X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/995612e2abc1131458863ed1d3e55206df7c33de..ede7b01760e920b31520b15c919445db882a8012:/src/common/image.cpp?ds=sidebyside diff --git a/src/common/image.cpp b/src/common/image.cpp index 5c304f0a9d..4fb2b0c254 100644 --- a/src/common/image.cpp +++ b/src/common/image.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: image.cpp +// Name: src/common/image.cpp // Purpose: wxImage // Author: Robert Roebling // RCS-ID: $Id$ @@ -7,10 +7,6 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "image.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -18,1637 +14,3332 @@ #pragma hdrstop #endif +#if wxUSE_IMAGE + #include "wx/image.h" -#include "wx/bitmap.h" -#include "wx/debug.h" -#include "wx/log.h" -#include "wx/app.h" + +#ifndef WX_PRECOMP + #include "wx/log.h" + #include "wx/hash.h" + #include "wx/utils.h" + #include "wx/math.h" + #include "wx/module.h" + #include "wx/palette.h" + #include "wx/intl.h" + #include "wx/colour.h" +#endif + #include "wx/filefn.h" #include "wx/wfstream.h" -#include "wx/intl.h" -#include "wx/module.h" +#include "wx/xpmdecod.h" // For memcpy #include -#ifdef __SALFORDC__ - #undef FAR +// make the code compile with either wxFile*Stream or wxFFile*Stream: +#define HAS_FILE_STREAMS (wxUSE_STREAMS && (wxUSE_FILE || wxUSE_FFILE)) + +#if HAS_FILE_STREAMS + #if wxUSE_FFILE + typedef wxFFileInputStream wxImageFileInputStream; + typedef wxFFileOutputStream wxImageFileOutputStream; + #elif wxUSE_FILE + typedef wxFileInputStream wxImageFileInputStream; + typedef wxFileOutputStream wxImageFileOutputStream; + #endif // wxUSE_FILE/wxUSE_FFILE +#endif // HAS_FILE_STREAMS + +#if wxUSE_VARIANT +IMPLEMENT_VARIANT_OBJECT_EXPORTED_SHALLOWCMP(wxImage,WXDLLEXPORT) #endif -#ifdef __WXMSW__ - #include "wx/msw/private.h" -#endif +//----------------------------------------------------------------------------- +// global data +//----------------------------------------------------------------------------- + +wxList wxImage::sm_handlers; +wxImage wxNullImage; //----------------------------------------------------------------------------- -// wxImage +// wxImageRefData //----------------------------------------------------------------------------- class wxImageRefData: public wxObjectRefData { - public: wxImageRefData(); - ~wxImageRefData(); + virtual ~wxImageRefData(); int m_width; int m_height; + wxBitmapType m_type; unsigned char *m_data; + bool m_hasMask; unsigned char m_maskRed,m_maskGreen,m_maskBlue; + + // alpha channel data, may be NULL for the formats without alpha support + unsigned char *m_alpha; + bool m_ok; + + // if true, m_data is pointer to static data and shouldn't be freed + bool m_static; + + // same as m_static but for m_alpha + bool m_staticAlpha; + +#if wxUSE_PALETTE + wxPalette m_palette; +#endif // wxUSE_PALETTE + + wxArrayString m_optionNames; + wxArrayString m_optionValues; + + wxDECLARE_NO_COPY_CLASS(wxImageRefData); }; wxImageRefData::wxImageRefData() { m_width = 0; m_height = 0; - m_data = (unsigned char*) NULL; - m_ok = FALSE; + m_type = wxBITMAP_TYPE_INVALID; + m_data = + m_alpha = (unsigned char *) NULL; + m_maskRed = 0; m_maskGreen = 0; m_maskBlue = 0; - m_hasMask = FALSE; + m_hasMask = false; + + m_ok = false; + m_static = + m_staticAlpha = false; } wxImageRefData::~wxImageRefData() { - if (m_data) free( m_data ); + if ( !m_static ) + free( m_data ); + if ( !m_staticAlpha ) + free( m_alpha ); } -wxList wxImage::sm_handlers; +//----------------------------------------------------------------------------- +// wxImage //----------------------------------------------------------------------------- -#define M_IMGDATA ((wxImageRefData *)m_refData) +#define M_IMGDATA static_cast(m_refData) -#if !USE_SHARED_LIBRARIES - IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) -#endif +IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) -wxImage::wxImage() +bool wxImage::Create(const char* const* xpmData) { -} +#if wxUSE_XPM + UnRef(); -wxImage::wxImage( int width, int height ) -{ - Create( width, height ); + wxXPMDecoder decoder; + (*this) = decoder.ReadData(xpmData); + return Ok(); +#else + return false; +#endif } -wxImage::wxImage( const wxString& name, long type ) +bool wxImage::Create( int width, int height, bool clear ) { - LoadFile( name, type ); + UnRef(); + + m_refData = new wxImageRefData(); + + M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 ); + if (!M_IMGDATA->m_data) + { + UnRef(); + return false; + } + + M_IMGDATA->m_width = width; + M_IMGDATA->m_height = height; + M_IMGDATA->m_ok = true; + + if (clear) + { + Clear(); + } + + return true; } -wxImage::wxImage( const wxString& name, const wxString& mimetype ) +bool wxImage::Create( int width, int height, unsigned char* data, bool static_data ) { - LoadFile( name, mimetype ); + UnRef(); + + wxCHECK_MSG( data, false, wxT("NULL data in wxImage::Create") ); + + m_refData = new wxImageRefData(); + + M_IMGDATA->m_data = data; + M_IMGDATA->m_width = width; + M_IMGDATA->m_height = height; + M_IMGDATA->m_ok = true; + M_IMGDATA->m_static = static_data; + + return true; } -#if wxUSE_STREAMS -wxImage::wxImage( wxInputStream& stream, long type ) +bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) { - LoadFile( stream, type ); + UnRef(); + + wxCHECK_MSG( data, false, wxT("NULL data in wxImage::Create") ); + + m_refData = new wxImageRefData(); + + M_IMGDATA->m_data = data; + M_IMGDATA->m_alpha = alpha; + M_IMGDATA->m_width = width; + M_IMGDATA->m_height = height; + M_IMGDATA->m_ok = true; + M_IMGDATA->m_static = static_data; + M_IMGDATA->m_staticAlpha = static_data; + + return true; } -wxImage::wxImage( wxInputStream& stream, const wxString& mimetype ) +void wxImage::Destroy() { - LoadFile( stream, mimetype ); + UnRef(); } -#endif // wxUSE_STREAMS -wxImage::wxImage( const wxImage& image ) +void wxImage::Clear(unsigned char value) { - Ref(image); + memset(M_IMGDATA->m_data, value, M_IMGDATA->m_width*M_IMGDATA->m_height*3); } -wxImage::wxImage( const wxImage* image ) +wxObjectRefData* wxImage::CreateRefData() const { - if (image) Ref(*image); + return new wxImageRefData; } -void wxImage::Create( int width, int height ) +wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const { - m_refData = new wxImageRefData(); - - M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 ); - if (M_IMGDATA->m_data) + const wxImageRefData* refData = static_cast(that); + wxCHECK_MSG(refData->m_ok, NULL, wxT("invalid image") ); + + wxImageRefData* refData_new = new wxImageRefData; + refData_new->m_width = refData->m_width; + refData_new->m_height = refData->m_height; + refData_new->m_maskRed = refData->m_maskRed; + refData_new->m_maskGreen = refData->m_maskGreen; + refData_new->m_maskBlue = refData->m_maskBlue; + refData_new->m_hasMask = refData->m_hasMask; + refData_new->m_ok = true; + unsigned size = unsigned(refData->m_width) * unsigned(refData->m_height); + if (refData->m_alpha != NULL) { - for (int l = 0; l < width*height*3; l++) M_IMGDATA->m_data[l] = 0; - - M_IMGDATA->m_width = width; - M_IMGDATA->m_height = height; - M_IMGDATA->m_ok = TRUE; - } - else - { - UnRef(); + refData_new->m_alpha = (unsigned char*)malloc(size); + memcpy(refData_new->m_alpha, refData->m_alpha, size); } + size *= 3; + refData_new->m_data = (unsigned char*)malloc(size); + memcpy(refData_new->m_data, refData->m_data, size); +#if wxUSE_PALETTE + refData_new->m_palette = refData->m_palette; +#endif + refData_new->m_optionNames = refData->m_optionNames; + refData_new->m_optionValues = refData->m_optionValues; + return refData_new; } -void wxImage::Destroy() +wxImage wxImage::Copy() const { - UnRef(); + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.m_refData = CloneRefData(m_refData); + + return image; } -wxImage wxImage::Scale( int width, int height ) const +wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const { + if( xFactor == 1 && yFactor == 1 ) + return *this; + wxImage image; wxCHECK_MSG( Ok(), image, wxT("invalid image") ); - wxCHECK_MSG( (width > 0) && (height > 0), image, wxT("invalid image size") ); + // can't scale to/from 0 size + wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image, + wxT("invalid new image size") ); - image.Create( width, height ); + long old_height = M_IMGDATA->m_height, + old_width = M_IMGDATA->m_width; - char unsigned *data = image.GetData(); + wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, + wxT("invalid old image size") ); - wxCHECK_MSG( data, image, wxT("unable to create image") ); + long width = old_width / xFactor ; + long height = old_height / yFactor ; - if (M_IMGDATA->m_hasMask) - image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + image.Create( width, height, false ); + + char unsigned *data = image.GetData(); - long old_height = M_IMGDATA->m_height; - long old_width = M_IMGDATA->m_width; + wxCHECK_MSG( data, image, wxT("unable to create image") ); - char unsigned *source_data = M_IMGDATA->m_data; - char unsigned *target_data = data; + bool hasMask = false ; + unsigned char maskRed = 0; + unsigned char maskGreen = 0; + unsigned char maskBlue =0 ; - for (long j = 0; j < height; j++) + unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data = data; + unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; + if (M_IMGDATA->m_hasMask) { - long y_offset = (j * old_height / height) * old_width; + hasMask = true ; + maskRed = M_IMGDATA->m_maskRed; + maskGreen = M_IMGDATA->m_maskGreen; + maskBlue =M_IMGDATA->m_maskBlue ; + + image.SetMaskColour( M_IMGDATA->m_maskRed, + M_IMGDATA->m_maskGreen, + M_IMGDATA->m_maskBlue ); + } + else + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + target_alpha = image.GetAlpha() ; + } + } - for (long i = 0; i < width; i++) + for (long y = 0; y < height; y++) + { + for (long x = 0; x < width; x++) { - memcpy( target_data, - source_data + 3*(y_offset + ((i * old_width )/ width)), - 3 ); - target_data += 3; + unsigned long avgRed = 0 ; + unsigned long avgGreen = 0; + unsigned long avgBlue = 0; + unsigned long avgAlpha = 0 ; + unsigned long counter = 0 ; + // determine average + for ( int y1 = 0 ; y1 < yFactor ; ++y1 ) + { + long y_offset = (y * yFactor + y1) * old_width; + for ( int x1 = 0 ; x1 < xFactor ; ++x1 ) + { + unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ; + unsigned char red = pixel[0] ; + unsigned char green = pixel[1] ; + unsigned char blue = pixel[2] ; + unsigned char alpha = 255 ; + if ( source_alpha ) + alpha = *(source_alpha + y_offset + x * xFactor + x1) ; + if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue ) + { + if ( alpha > 0 ) + { + avgRed += red ; + avgGreen += green ; + avgBlue += blue ; + } + avgAlpha += alpha ; + counter++ ; + } + } + } + if ( counter == 0 ) + { + *(target_data++) = M_IMGDATA->m_maskRed ; + *(target_data++) = M_IMGDATA->m_maskGreen ; + *(target_data++) = M_IMGDATA->m_maskBlue ; + } + else + { + if ( source_alpha ) + *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ; + *(target_data++) = (unsigned char)(avgRed / counter); + *(target_data++) = (unsigned char)(avgGreen / counter); + *(target_data++) = (unsigned char)(avgBlue / counter); + } } } + // In case this is a cursor, make sure the hotspot is scaled accordingly: + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, + (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor); + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, + (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y))/yFactor); + return image; } -wxImage wxImage::GetSubImage( const wxRect &rect ) const +wxImage +wxImage::Scale( int width, int height, wxImageResizeQuality quality ) const { wxImage image; wxCHECK_MSG( Ok(), image, wxT("invalid image") ); - wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()) - , image, wxT("invalid subimage size") ); + // can't scale to/from 0 size + wxCHECK_MSG( (width > 0) && (height > 0), image, + wxT("invalid new image size") ); - int subwidth=rect.GetWidth(); - const int subheight=rect.GetHeight(); + long old_height = M_IMGDATA->m_height, + old_width = M_IMGDATA->m_width; + wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, + wxT("invalid old image size") ); - image.Create( subwidth, subheight ); + // If the image's new width and height are the same as the original, no + // need to waste time or CPU cycles + if ( old_width == width && old_height == height ) + return *this; - char unsigned *subdata = image.GetData(), *data=GetData(); + // resample the image using either the nearest neighbourhood, bilinear or + // bicubic method as specified + switch ( quality ) + { + case wxIMAGE_QUALITY_BICUBIC: + case wxIMAGE_QUALITY_BILINEAR: + // both of these algorithms should be used for up-sampling the + // image only, when down-sampling always use box averaging for best + // results + if ( width < old_width && height < old_height ) + image = ResampleBox(width, height); + else if ( quality == wxIMAGE_QUALITY_BILINEAR ) + image = ResampleBilinear(width, height); + else if ( quality == wxIMAGE_QUALITY_BICUBIC ) + image = ResampleBicubic(width, height); + break; + + case wxIMAGE_QUALITY_NEAREST: + if ( old_width % width == 0 && old_width >= width && + old_height % height == 0 && old_height >= height ) + { + return ShrinkBy( old_width / width , old_height / height ); + } - wxCHECK_MSG( subdata, image, wxT("unable to create image") ); + image = ResampleNearest(width, height); + break; + } + // If the original image has a mask, apply the mask to the new image if (M_IMGDATA->m_hasMask) - image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); - - const int subleft=3*rect.GetLeft(); - const int width=3*GetWidth(); - subwidth*=3; - - data+=rect.GetTop()*width+subleft; - - for (long j = 0; j < subheight; ++j) { - memcpy( subdata, data, subwidth); - subdata+=subwidth; - data+=width; + image.SetMaskColour( M_IMGDATA->m_maskRed, + M_IMGDATA->m_maskGreen, + M_IMGDATA->m_maskBlue ); } + // In case this is a cursor, make sure the hotspot is scaled accordingly: + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, + (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width); + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, + (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)*height)/old_height); + return image; } -void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) +wxImage wxImage::ResampleNearest(int width, int height) const { - wxCHECK_RET( Ok(), wxT("invalid image") ); + wxImage image; + image.Create( width, height, false ); - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + unsigned char *data = image.GetData(); - wxCHECK_RET( (x>=0) && (y>=0) && (xm_data; + unsigned char *target_data = data; + unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; - M_IMGDATA->m_data[ pos ] = r; - M_IMGDATA->m_data[ pos+1 ] = g; - M_IMGDATA->m_data[ pos+2 ] = b; -} + if ( !M_IMGDATA->m_hasMask ) + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + target_alpha = image.GetAlpha() ; + } + } -unsigned char wxImage::GetRed( int x, int y ) -{ - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + long old_height = M_IMGDATA->m_height, + old_width = M_IMGDATA->m_width; + long x_delta = (old_width<<16) / width; + long y_delta = (old_height<<16) / height; - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + unsigned char* dest_pixel = target_data; - wxCHECK_MSG( (x>=0) && (y>=0) && (x>16)*old_width*3]; + unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ; - long pos = (y * w + x) * 3; + long x = 0; + for ( long i = 0; i < width; i++ ) + { + unsigned char* src_pixel = &src_line[(x>>16)*3]; + unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ; + dest_pixel[0] = src_pixel[0]; + dest_pixel[1] = src_pixel[1]; + dest_pixel[2] = src_pixel[2]; + dest_pixel += 3; + if ( source_alpha ) + *(target_alpha++) = *src_alpha_pixel ; + x += x_delta; + } - return M_IMGDATA->m_data[pos]; + y += y_delta; + } + + return image; } -unsigned char wxImage::GetGreen( int x, int y ) +wxImage wxImage::ResampleBox(int width, int height) const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + // This function implements a simple pre-blur/box averaging method for + // downsampling that gives reasonably smooth results To scale the image + // down we will need to gather a grid of pixels of the size of the scale + // factor in each direction and then do an averaging of the pixels. - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + wxImage ret_image(width, height, false); - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_width) / width; + const double scale_factor_y = double(M_IMGDATA->m_height) / height; - long pos = (y * w + x) * 3; + const int scale_factor_x_2 = (int)(scale_factor_x / 2); + const int scale_factor_y_2 = (int)(scale_factor_y / 2); - return M_IMGDATA->m_data[pos+1]; -} - -unsigned char wxImage::GetBlue( int x, int y ) -{ - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + unsigned char* src_data = M_IMGDATA->m_data; + unsigned char* src_alpha = M_IMGDATA->m_alpha; + unsigned char* dst_data = ret_image.GetData(); + unsigned char* dst_alpha = NULL; - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + if ( src_alpha ) + { + ret_image.SetAlpha(); + dst_alpha = ret_image.GetAlpha(); + } - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_data[pos+2]; -} + for ( int x = 0; x < width; x++ ) // Destination image - X direction + { + // Source pixel in the X direction + int src_x = (int)(x * scale_factor_x); -bool wxImage::Ok() const -{ - return (M_IMGDATA && M_IMGDATA->m_ok); -} + // Box of pixels to average + averaged_pixels = 0; + sum_r = sum_g = sum_b = sum_a = 0.0; -char unsigned *wxImage::GetData() const -{ - wxCHECK_MSG( Ok(), (char unsigned *)NULL, wxT("invalid image") ); + for ( int j = int(src_y - scale_factor_y/2.0 + 1); + j <= int(src_y + scale_factor_y_2); + j++ ) + { + // We don't care to average pixels that don't exist (edges) + if ( j < 0 || j > M_IMGDATA->m_height - 1 ) + continue; - return M_IMGDATA->m_data; -} + for ( int i = int(src_x - scale_factor_x/2.0 + 1); + i <= src_x + scale_factor_x_2; + i++ ) + { + // Don't average edge pixels + if ( i < 0 || i > M_IMGDATA->m_width - 1 ) + continue; -void wxImage::SetData( char unsigned *data ) -{ - wxCHECK_RET( Ok(), wxT("invalid image") ); + // Calculate the actual index in our source pixels + src_pixel_index = j * M_IMGDATA->m_width + i; - wxImageRefData *newRefData = new wxImageRefData(); + sum_r += src_data[src_pixel_index * 3 + 0]; + sum_g += src_data[src_pixel_index * 3 + 1]; + sum_b += src_data[src_pixel_index * 3 + 2]; + if ( src_alpha ) + sum_a += src_alpha[src_pixel_index]; - newRefData->m_width = M_IMGDATA->m_width; - newRefData->m_height = M_IMGDATA->m_height; - newRefData->m_data = data; - newRefData->m_ok = TRUE; - newRefData->m_maskRed = M_IMGDATA->m_maskRed; - newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; - newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; - newRefData->m_hasMask = M_IMGDATA->m_hasMask; + averaged_pixels++; + } + } - UnRef(); + // Calculate the average from the sum and number of averaged pixels + dst_data[0] = (unsigned char)(sum_r / averaged_pixels); + dst_data[1] = (unsigned char)(sum_g / averaged_pixels); + dst_data[2] = (unsigned char)(sum_b / averaged_pixels); + dst_data += 3; + if ( src_alpha ) + *dst_alpha++ = (unsigned char)(sum_a / averaged_pixels); + } + } - m_refData = newRefData; + return ret_image; } -void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) +wxImage wxImage::ResampleBilinear(int width, int height) const { - wxCHECK_RET( Ok(), wxT("invalid image") ); + // This function implements a Bilinear algorithm for resampling. + wxImage ret_image(width, height, false); + unsigned char* src_data = M_IMGDATA->m_data; + unsigned char* src_alpha = M_IMGDATA->m_alpha; + unsigned char* dst_data = ret_image.GetData(); + unsigned char* dst_alpha = NULL; + + if ( src_alpha ) + { + ret_image.SetAlpha(); + dst_alpha = ret_image.GetAlpha(); + } + double HFactor = double(M_IMGDATA->m_height) / height; + double WFactor = double(M_IMGDATA->m_width) / width; - M_IMGDATA->m_maskRed = r; - M_IMGDATA->m_maskGreen = g; - M_IMGDATA->m_maskBlue = b; - M_IMGDATA->m_hasMask = TRUE; -} + int srcpixymax = M_IMGDATA->m_height - 1; + int srcpixxmax = M_IMGDATA->m_width - 1; -unsigned char wxImage::GetMaskRed() const -{ - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + double srcpixy, srcpixy1, srcpixy2, dy, dy1; + double srcpixx, srcpixx1, srcpixx2, dx, dx1; - return M_IMGDATA->m_maskRed; -} + // initialize alpha values to avoid g++ warnings about possibly + // uninitialized variables + double r1, g1, b1, a1 = 0; + double r2, g2, b2, a2 = 0; -unsigned char wxImage::GetMaskGreen() const -{ - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + for ( int dsty = 0; dsty < height; dsty++ ) + { + // We need to calculate the source pixel to interpolate from - Y-axis + srcpixy = double(dsty) * HFactor; + srcpixy1 = int(srcpixy); + srcpixy2 = ( srcpixy1 == srcpixymax ) ? srcpixy1 : srcpixy1 + 1.0; + dy = srcpixy - (int)srcpixy; + dy1 = 1.0 - dy; - return M_IMGDATA->m_maskGreen; -} -unsigned char wxImage::GetMaskBlue() const -{ - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + for ( int dstx = 0; dstx < width; dstx++ ) + { + // X-axis of pixel to interpolate from + srcpixx = double(dstx) * WFactor; + srcpixx1 = int(srcpixx); + srcpixx2 = ( srcpixx1 == srcpixxmax ) ? srcpixx1 : srcpixx1 + 1.0; + dx = srcpixx - (int)srcpixx; + dx1 = 1.0 - dx; + + int x_offset1 = srcpixx1 < 0.0 ? 0 : srcpixx1 > srcpixxmax ? srcpixxmax : (int)srcpixx1; + int x_offset2 = srcpixx2 < 0.0 ? 0 : srcpixx2 > srcpixxmax ? srcpixxmax : (int)srcpixx2; + int y_offset1 = srcpixy1 < 0.0 ? 0 : srcpixy1 > srcpixymax ? srcpixymax : (int)srcpixy1; + int y_offset2 = srcpixy2 < 0.0 ? 0 : srcpixy2 > srcpixymax ? srcpixymax : (int)srcpixy2; + + int src_pixel_index00 = y_offset1 * M_IMGDATA->m_width + x_offset1; + int src_pixel_index01 = y_offset1 * M_IMGDATA->m_width + x_offset2; + int src_pixel_index10 = y_offset2 * M_IMGDATA->m_width + x_offset1; + int src_pixel_index11 = y_offset2 * M_IMGDATA->m_width + x_offset2; + + //first line + r1 = src_data[src_pixel_index00 * 3 + 0] * dx1 + src_data[src_pixel_index01 * 3 + 0] * dx; + g1 = src_data[src_pixel_index00 * 3 + 1] * dx1 + src_data[src_pixel_index01 * 3 + 1] * dx; + b1 = src_data[src_pixel_index00 * 3 + 2] * dx1 + src_data[src_pixel_index01 * 3 + 2] * dx; + if ( src_alpha ) + a1 = src_alpha[src_pixel_index00] * dx1 + src_alpha[src_pixel_index01] * dx; + + //second line + r2 = src_data[src_pixel_index10 * 3 + 0] * dx1 + src_data[src_pixel_index11 * 3 + 0] * dx; + g2 = src_data[src_pixel_index10 * 3 + 1] * dx1 + src_data[src_pixel_index11 * 3 + 1] * dx; + b2 = src_data[src_pixel_index10 * 3 + 2] * dx1 + src_data[src_pixel_index11 * 3 + 2] * dx; + if ( src_alpha ) + a2 = src_alpha[src_pixel_index10] * dx1 + src_alpha[src_pixel_index11] * dx; + + //result lines + + dst_data[0] = static_cast(r1 * dy1 + r2 * dy); + dst_data[1] = static_cast(g1 * dy1 + g2 * dy); + dst_data[2] = static_cast(b1 * dy1 + b2 * dy); + dst_data += 3; + + if ( src_alpha ) + *dst_alpha++ = static_cast(a1 * dy1 + a2 * dy); + } + } - return M_IMGDATA->m_maskBlue; + return ret_image; } -void wxImage::SetMask( bool mask ) +// The following two local functions are for the B-spline weighting of the +// bicubic sampling algorithm +static inline double spline_cube(double value) { - wxCHECK_RET( Ok(), wxT("invalid image") ); - - M_IMGDATA->m_hasMask = mask; + return value <= 0.0 ? 0.0 : value * value * value; } -bool wxImage::HasMask() const +static inline double spline_weight(double value) { - wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") ); - - return M_IMGDATA->m_hasMask; + return (spline_cube(value + 2) - + 4 * spline_cube(value + 1) + + 6 * spline_cube(value) - + 4 * spline_cube(value - 1)) / 6; } -int wxImage::GetWidth() const +// This is the bicubic resampling algorithm +wxImage wxImage::ResampleBicubic(int width, int height) const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + // This function implements a Bicubic B-Spline algorithm for resampling. + // This method is certainly a little slower than wxImage's default pixel + // replication method, however for most reasonably sized images not being + // upsampled too much on a fairly average CPU this difference is hardly + // noticeable and the results are far more pleasing to look at. + // + // This particular bicubic algorithm does pixel weighting according to a + // B-Spline that basically implements a Gaussian bell-like weighting + // kernel. Because of this method the results may appear a bit blurry when + // upsampling by large factors. This is basically because a slight + // gaussian blur is being performed to get the smooth look of the upsampled + // image. + + // Edge pixels: 3-4 possible solutions + // - (Wrap/tile) Wrap the image, take the color value from the opposite + // side of the image. + // - (Mirror) Duplicate edge pixels, so that pixel at coordinate (2, n), + // where n is nonpositive, will have the value of (2, 1). + // - (Ignore) Simply ignore the edge pixels and apply the kernel only to + // pixels which do have all neighbours. + // - (Clamp) Choose the nearest pixel along the border. This takes the + // border pixels and extends them out to infinity. + // + // NOTE: below the y_offset and x_offset variables are being set for edge + // pixels using the "Mirror" method mentioned above + + wxImage ret_image; + + ret_image.Create(width, height, false); + + unsigned char* src_data = M_IMGDATA->m_data; + unsigned char* src_alpha = M_IMGDATA->m_alpha; + unsigned char* dst_data = ret_image.GetData(); + unsigned char* dst_alpha = NULL; + + if ( src_alpha ) + { + ret_image.SetAlpha(); + dst_alpha = ret_image.GetAlpha(); + } - return M_IMGDATA->m_width; -} + for ( int dsty = 0; dsty < height; dsty++ ) + { + // We need to calculate the source pixel to interpolate from - Y-axis + double srcpixy = double(dsty * M_IMGDATA->m_height) / height; + double dy = srcpixy - (int)srcpixy; -int wxImage::GetHeight() const -{ - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + for ( int dstx = 0; dstx < width; dstx++ ) + { + // X-axis of pixel to interpolate from + double srcpixx = double(dstx * M_IMGDATA->m_width) / width; + double dx = srcpixx - (int)srcpixx; - return M_IMGDATA->m_height; -} + // Sums for each color channel + double sum_r = 0, sum_g = 0, sum_b = 0, sum_a = 0; -bool wxImage::LoadFile( const wxString& filename, long type ) -{ -#if wxUSE_STREAMS - if (wxFileExists(filename)) - { - wxFileInputStream stream(filename); - return LoadFile(stream, type); - } + // Here we actually determine the RGBA values for the destination pixel + for ( int k = -1; k <= 2; k++ ) + { + // Y offset + int y_offset = srcpixy + k < 0.0 + ? 0 + : srcpixy + k >= M_IMGDATA->m_height + ? M_IMGDATA->m_height - 1 + : (int)(srcpixy + k); + + // Loop across the X axis + for ( int i = -1; i <= 2; i++ ) + { + // X offset + int x_offset = srcpixx + i < 0.0 + ? 0 + : srcpixx + i >= M_IMGDATA->m_width + ? M_IMGDATA->m_width - 1 + : (int)(srcpixx + i); + + // Calculate the exact position where the source data + // should be pulled from based on the x_offset and y_offset + int src_pixel_index = y_offset*M_IMGDATA->m_width + x_offset; + + // Calculate the weight for the specified pixel according + // to the bicubic b-spline kernel we're using for + // interpolation + double + pixel_weight = spline_weight(i - dx)*spline_weight(k - dy); + + // Create a sum of all velues for each color channel + // adjusted for the pixel's calculated weight + sum_r += src_data[src_pixel_index * 3 + 0] * pixel_weight; + sum_g += src_data[src_pixel_index * 3 + 1] * pixel_weight; + sum_b += src_data[src_pixel_index * 3 + 2] * pixel_weight; + if ( src_alpha ) + sum_a += src_alpha[src_pixel_index] * pixel_weight; + } + } - else { - wxLogError( wxT("Can't load image from file '%s': file does not exist."), filename.c_str() ); + // Put the data into the destination image. The summed values are + // of double data type and are rounded here for accuracy + dst_data[0] = (unsigned char)(sum_r + 0.5); + dst_data[1] = (unsigned char)(sum_g + 0.5); + dst_data[2] = (unsigned char)(sum_b + 0.5); + dst_data += 3; - return FALSE; + if ( src_alpha ) + *dst_alpha++ = (unsigned char)sum_a; + } } -#else // !wxUSE_STREAMS - return FALSE; -#endif // wxUSE_STREAMS + + return ret_image; } -bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype ) +// Blur in the horizontal direction +wxImage wxImage::BlurHorizontal(int blurRadius) const { -#if wxUSE_STREAMS - if (wxFileExists(filename)) + wxImage ret_image; + ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); + + unsigned char* src_data = M_IMGDATA->m_data; + unsigned char* dst_data = ret_image.GetData(); + unsigned char* src_alpha = M_IMGDATA->m_alpha; + unsigned char* dst_alpha = NULL; + + // Check for a mask or alpha + if ( src_alpha ) { - wxFileInputStream stream(filename); - return LoadFile(stream, mimetype); + ret_image.SetAlpha(); + dst_alpha = ret_image.GetAlpha(); } + else if ( M_IMGDATA->m_hasMask ) + { + ret_image.SetMaskColour(M_IMGDATA->m_maskRed, + M_IMGDATA->m_maskGreen, + M_IMGDATA->m_maskBlue); + } + + // number of pixels we average over + const int blurArea = blurRadius*2 + 1; + + // Horizontal blurring algorithm - average all pixels in the specified blur + // radius in the X or horizontal direction + for ( int y = 0; y < M_IMGDATA->m_height; y++ ) + { + // Variables used in the blurring algorithm + long sum_r = 0, + sum_g = 0, + sum_b = 0, + sum_a = 0; + + long pixel_idx; + const unsigned char *src; + unsigned char *dst; + + // Calculate the average of all pixels in the blur radius for the first + // pixel of the row + for ( int kernel_x = -blurRadius; kernel_x <= blurRadius; kernel_x++ ) + { + // To deal with the pixels at the start of a row so it's not + // grabbing GOK values from memory at negative indices of the + // image's data or grabbing from the previous row + if ( kernel_x < 0 ) + pixel_idx = y * M_IMGDATA->m_width; + else + pixel_idx = kernel_x + y * M_IMGDATA->m_width; + + src = src_data + pixel_idx*3; + sum_r += src[0]; + sum_g += src[1]; + sum_b += src[2]; + if ( src_alpha ) + sum_a += src_alpha[pixel_idx]; + } - else { - wxLogError( wxT("Can't load image from file '%s': file does not exist."), filename.c_str() ); + dst = dst_data + y * M_IMGDATA->m_width*3; + dst[0] = (unsigned char)(sum_r / blurArea); + dst[1] = (unsigned char)(sum_g / blurArea); + dst[2] = (unsigned char)(sum_b / blurArea); + if ( src_alpha ) + dst_alpha[y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); - return FALSE; + // Now average the values of the rest of the pixels by just moving the + // blur radius box along the row + for ( int x = 1; x < M_IMGDATA->m_width; x++ ) + { + // Take care of edge pixels on the left edge by essentially + // duplicating the edge pixel + if ( x - blurRadius - 1 < 0 ) + pixel_idx = y * M_IMGDATA->m_width; + else + pixel_idx = (x - blurRadius - 1) + y * M_IMGDATA->m_width; + + // Subtract the value of the pixel at the left side of the blur + // radius box + src = src_data + pixel_idx*3; + sum_r -= src[0]; + sum_g -= src[1]; + sum_b -= src[2]; + if ( src_alpha ) + sum_a -= src_alpha[pixel_idx]; + + // Take care of edge pixels on the right edge + if ( x + blurRadius > M_IMGDATA->m_width - 1 ) + pixel_idx = M_IMGDATA->m_width - 1 + y * M_IMGDATA->m_width; + else + pixel_idx = x + blurRadius + y * M_IMGDATA->m_width; + + // Add the value of the pixel being added to the end of our box + src = src_data + pixel_idx*3; + sum_r += src[0]; + sum_g += src[1]; + sum_b += src[2]; + if ( src_alpha ) + sum_a += src_alpha[pixel_idx]; + + // Save off the averaged data + dst = dst_data + x*3 + y*M_IMGDATA->m_width*3; + dst[0] = (unsigned char)(sum_r / blurArea); + dst[1] = (unsigned char)(sum_g / blurArea); + dst[2] = (unsigned char)(sum_b / blurArea); + if ( src_alpha ) + dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); + } } -#else // !wxUSE_STREAMS - return FALSE; -#endif // wxUSE_STREAMS + + return ret_image; } -bool wxImage::SaveFile( const wxString& filename, int type ) +// Blur in the vertical direction +wxImage wxImage::BlurVertical(int blurRadius) const { -#if wxUSE_STREAMS - wxFileOutputStream stream(filename); + wxImage ret_image; + ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); - if ( stream.LastError() == wxStream_NOERROR ) - return SaveFile(stream, type); - else -#endif // wxUSE_STREAMS - return FALSE; + unsigned char* src_data = M_IMGDATA->m_data; + unsigned char* dst_data = ret_image.GetData(); + unsigned char* src_alpha = M_IMGDATA->m_alpha; + unsigned char* dst_alpha = NULL; + + // Check for a mask or alpha + if ( src_alpha ) + { + ret_image.SetAlpha(); + dst_alpha = ret_image.GetAlpha(); + } + else if ( M_IMGDATA->m_hasMask ) + { + ret_image.SetMaskColour(M_IMGDATA->m_maskRed, + M_IMGDATA->m_maskGreen, + M_IMGDATA->m_maskBlue); + } + + // number of pixels we average over + const int blurArea = blurRadius*2 + 1; + + // Vertical blurring algorithm - same as horizontal but switched the + // opposite direction + for ( int x = 0; x < M_IMGDATA->m_width; x++ ) + { + // Variables used in the blurring algorithm + long sum_r = 0, + sum_g = 0, + sum_b = 0, + sum_a = 0; + + long pixel_idx; + const unsigned char *src; + unsigned char *dst; + + // Calculate the average of all pixels in our blur radius box for the + // first pixel of the column + for ( int kernel_y = -blurRadius; kernel_y <= blurRadius; kernel_y++ ) + { + // To deal with the pixels at the start of a column so it's not + // grabbing GOK values from memory at negative indices of the + // image's data or grabbing from the previous column + if ( kernel_y < 0 ) + pixel_idx = x; + else + pixel_idx = x + kernel_y * M_IMGDATA->m_width; + + src = src_data + pixel_idx*3; + sum_r += src[0]; + sum_g += src[1]; + sum_b += src[2]; + if ( src_alpha ) + sum_a += src_alpha[pixel_idx]; + } + + dst = dst_data + x*3; + dst[0] = (unsigned char)(sum_r / blurArea); + dst[1] = (unsigned char)(sum_g / blurArea); + dst[2] = (unsigned char)(sum_b / blurArea); + if ( src_alpha ) + dst_alpha[x] = (unsigned char)(sum_a / blurArea); + + // Now average the values of the rest of the pixels by just moving the + // box along the column from top to bottom + for ( int y = 1; y < M_IMGDATA->m_height; y++ ) + { + // Take care of pixels that would be beyond the top edge by + // duplicating the top edge pixel for the column + if ( y - blurRadius - 1 < 0 ) + pixel_idx = x; + else + pixel_idx = x + (y - blurRadius - 1) * M_IMGDATA->m_width; + + // Subtract the value of the pixel at the top of our blur radius box + src = src_data + pixel_idx*3; + sum_r -= src[0]; + sum_g -= src[1]; + sum_b -= src[2]; + if ( src_alpha ) + sum_a -= src_alpha[pixel_idx]; + + // Take care of the pixels that would be beyond the bottom edge of + // the image similar to the top edge + if ( y + blurRadius > M_IMGDATA->m_height - 1 ) + pixel_idx = x + (M_IMGDATA->m_height - 1) * M_IMGDATA->m_width; + else + pixel_idx = x + (blurRadius + y) * M_IMGDATA->m_width; + + // Add the value of the pixel being added to the end of our box + src = src_data + pixel_idx*3; + sum_r += src[0]; + sum_g += src[1]; + sum_b += src[2]; + if ( src_alpha ) + sum_a += src_alpha[pixel_idx]; + + // Save off the averaged data + dst = dst_data + (x + y * M_IMGDATA->m_width) * 3; + dst[0] = (unsigned char)(sum_r / blurArea); + dst[1] = (unsigned char)(sum_g / blurArea); + dst[2] = (unsigned char)(sum_b / blurArea); + if ( src_alpha ) + dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); + } + } + + return ret_image; } -bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) +// The new blur function +wxImage wxImage::Blur(int blurRadius) const { -#if wxUSE_STREAMS - wxFileOutputStream stream(filename); + wxImage ret_image; + ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); + + // Blur the image in each direction + ret_image = BlurHorizontal(blurRadius); + ret_image = ret_image.BlurVertical(blurRadius); + + return ret_image; +} + +wxImage wxImage::Rotate90( bool clockwise ) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false ); + + unsigned char *data = image.GetData(); + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data; + unsigned char *alpha_data = 0 ; + unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; - if ( stream.LastError() == wxStream_NOERROR ) - return SaveFile(stream, mimetype); + if (M_IMGDATA->m_hasMask) + { + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + } else -#endif // wxUSE_STREAMS - return FALSE; + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + alpha_data = image.GetAlpha() ; + } + } + + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; + + for (long j = 0; j < height; j++) + { + for (long i = 0; i < width; i++) + { + if (clockwise) + { + target_data = data + (((i+1)*height) - j - 1)*3; + if(source_alpha) + target_alpha = alpha_data + (((i+1)*height) - j - 1); + } + else + { + target_data = data + ((height*(width-1)) + j - (i*height))*3; + if(source_alpha) + target_alpha = alpha_data + ((height*(width-1)) + j - (i*height)); + } + memcpy( target_data, source_data, 3 ); + source_data += 3; + + if(source_alpha) + { + memcpy( target_alpha, source_alpha, 1 ); + source_alpha += 1; + } + } + } + + return image; } -#if wxUSE_STREAMS +wxImage wxImage::Mirror( bool horizontally ) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); + + unsigned char *data = image.GetData(); + unsigned char *alpha = NULL; + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + if (M_IMGDATA->m_alpha != NULL) { + image.SetAlpha(); + alpha = image.GetAlpha(); + wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") ); + } + + if (M_IMGDATA->m_hasMask) + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; + + unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data; + + if (horizontally) + { + for (long j = 0; j < height; j++) + { + data += width*3; + target_data = data-3; + for (long i = 0; i < width; i++) + { + memcpy( target_data, source_data, 3 ); + source_data += 3; + target_data -= 3; + } + } + + if (alpha != NULL) + { + // src_alpha starts at the first pixel and increases by 1 after each step + // (a step here is the copy of the alpha value of one pixel) + const unsigned char *src_alpha = M_IMGDATA->m_alpha; + // dest_alpha starts just beyond the first line, decreases before each step, + // and after each line is finished, increases by 2 widths (skipping the line + // just copied and the line that will be copied next) + unsigned char *dest_alpha = alpha + width; + + for (long jj = 0; jj < height; ++jj) + { + for (long i = 0; i < width; ++i) { + *(--dest_alpha) = *(src_alpha++); // copy one pixel + } + dest_alpha += 2 * width; // advance beyond the end of the next line + } + } + } + else + { + for (long i = 0; i < height; i++) + { + target_data = data + 3*width*(height-1-i); + memcpy( target_data, source_data, (size_t)3*width ); + source_data += 3*width; + } + + if (alpha != NULL) + { + // src_alpha starts at the first pixel and increases by 1 width after each step + // (a step here is the copy of the alpha channel of an entire line) + const unsigned char *src_alpha = M_IMGDATA->m_alpha; + // dest_alpha starts just beyond the last line (beyond the whole image) + // and decreases by 1 width before each step + unsigned char *dest_alpha = alpha + width * height; + + for (long jj = 0; jj < height; ++jj) + { + dest_alpha -= width; + memcpy( dest_alpha, src_alpha, (size_t)width ); + src_alpha += width; + } + } + } + + return image; +} + +wxImage wxImage::GetSubImage( const wxRect &rect ) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && + (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), + image, wxT("invalid subimage size") ); + + const int subwidth = rect.GetWidth(); + const int subheight = rect.GetHeight(); + + image.Create( subwidth, subheight, false ); + + const unsigned char *src_data = GetData(); + const unsigned char *src_alpha = M_IMGDATA->m_alpha; + unsigned char *subdata = image.GetData(); + unsigned char *subalpha = NULL; + + wxCHECK_MSG( subdata, image, wxT("unable to create image") ); + + if (src_alpha != NULL) { + image.SetAlpha(); + subalpha = image.GetAlpha(); + wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel")); + } + + if (M_IMGDATA->m_hasMask) + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + + const int width = GetWidth(); + const int pixsoff = rect.GetLeft() + width * rect.GetTop(); + + src_data += 3 * pixsoff; + src_alpha += pixsoff; // won't be used if was NULL, so this is ok + + for (long j = 0; j < subheight; ++j) + { + memcpy( subdata, src_data, 3 * subwidth ); + subdata += 3 * subwidth; + src_data += 3 * width; + if (subalpha != NULL) { + memcpy( subalpha, src_alpha, subwidth ); + subalpha += subwidth; + src_alpha += width; + } + } + + return image; +} + +wxImage wxImage::Size( const wxSize& size, const wxPoint& pos, + int r_, int g_, int b_ ) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") ); + + int width = GetWidth(), height = GetHeight(); + image.Create(size.GetWidth(), size.GetHeight(), false); + + unsigned char r = (unsigned char)r_; + unsigned char g = (unsigned char)g_; + unsigned char b = (unsigned char)b_; + if ((r_ == -1) && (g_ == -1) && (b_ == -1)) + { + GetOrFindMaskColour( &r, &g, &b ); + image.SetMaskColour(r, g, b); + } + + image.SetRGB(wxRect(), r, g, b); + + // we have two coordinate systems: + // source: starting at 0,0 of source image + // destination starting at 0,0 of destination image + // Documentation says: + // "The image is pasted into a new image [...] at the position pos relative + // to the upper left of the new image." this means the transition rule is: + // "dest coord" = "source coord" + pos; + + // calculate the intersection using source coordinates: + wxRect srcRect(0, 0, width, height); + wxRect dstRect(-pos, size); + + srcRect.Intersect(dstRect); + + if (!srcRect.IsEmpty()) + { + // insertion point is needed in destination coordinates. + // NB: it is not always "pos"! + wxPoint ptInsert = srcRect.GetTopLeft() + pos; + + if ((srcRect.GetWidth() == width) && (srcRect.GetHeight() == height)) + image.Paste(*this, ptInsert.x, ptInsert.y); + else + image.Paste(GetSubImage(srcRect), ptInsert.x, ptInsert.y); + } + + return image; +} + +void wxImage::Paste( const wxImage &image, int x, int y ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_RET( image.Ok(), wxT("invalid image") ); + + AllocExclusive(); + + int xx = 0; + int yy = 0; + int width = image.GetWidth(); + int height = image.GetHeight(); + + if (x < 0) + { + xx = -x; + width += x; + } + if (y < 0) + { + yy = -y; + height += y; + } + + if ((x+xx)+width > M_IMGDATA->m_width) + width = M_IMGDATA->m_width - (x+xx); + if ((y+yy)+height > M_IMGDATA->m_height) + height = M_IMGDATA->m_height - (y+yy); + + if (width < 1) return; + if (height < 1) return; + + if ((!HasMask() && !image.HasMask()) || + (HasMask() && !image.HasMask()) || + ((HasMask() && image.HasMask() && + (GetMaskRed()==image.GetMaskRed()) && + (GetMaskGreen()==image.GetMaskGreen()) && + (GetMaskBlue()==image.GetMaskBlue())))) + { + unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); + int source_step = image.GetWidth()*3; + + unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; + int target_step = M_IMGDATA->m_width*3; + for (int j = 0; j < height; j++) + { + memcpy( target_data, source_data, width*3 ); + source_data += source_step; + target_data += target_step; + } + } + + // Copy over the alpha channel from the original image + if ( image.HasAlpha() ) + { + if ( !HasAlpha() ) + InitAlpha(); + + unsigned char* source_data = image.GetAlpha() + xx + yy*image.GetWidth(); + int source_step = image.GetWidth(); + + unsigned char* target_data = GetAlpha() + (x+xx) + (y+yy)*M_IMGDATA->m_width; + int target_step = M_IMGDATA->m_width; + + for (int j = 0; j < height; j++, + source_data += source_step, + target_data += target_step) + { + memcpy( target_data, source_data, width ); + } + } + + if (!HasMask() && image.HasMask()) + { + unsigned char r = image.GetMaskRed(); + unsigned char g = image.GetMaskGreen(); + unsigned char b = image.GetMaskBlue(); + + unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); + int source_step = image.GetWidth()*3; + + unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; + int target_step = M_IMGDATA->m_width*3; + + for (int j = 0; j < height; j++) + { + for (int i = 0; i < width*3; i+=3) + { + if ((source_data[i] != r) || + (source_data[i+1] != g) || + (source_data[i+2] != b)) + { + memcpy( target_data+i, source_data+i, 3 ); + } + } + source_data += source_step; + target_data += target_step; + } + } +} + +void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1, + unsigned char r2, unsigned char g2, unsigned char b2 ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + unsigned char *data = GetData(); + + const int w = GetWidth(); + const int h = GetHeight(); + + for (int j = 0; j < h; j++) + for (int i = 0; i < w; i++) + { + if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1)) + { + data[0] = r2; + data[1] = g2; + data[2] = b2; + } + data += 3; + } +} + +wxImage wxImage::ConvertToGreyscale(void) const +{ + return ConvertToGreyscale(0.299, 0.587, 0.114); +} + +wxImage wxImage::ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); + + unsigned char *dest = image.GetData(); + + wxCHECK_MSG( dest, image, wxT("unable to create image") ); + + unsigned char *src = M_IMGDATA->m_data; + bool hasMask = M_IMGDATA->m_hasMask; + unsigned char maskRed = M_IMGDATA->m_maskRed; + unsigned char maskGreen = M_IMGDATA->m_maskGreen; + unsigned char maskBlue = M_IMGDATA->m_maskBlue; + + if ( hasMask ) + image.SetMaskColour(maskRed, maskGreen, maskBlue); + + const long size = M_IMGDATA->m_width * M_IMGDATA->m_height; + for ( long i = 0; i < size; i++, src += 3, dest += 3 ) + { + memcpy(dest, src, 3); + // don't modify the mask + if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue ) + { + } + else + { + wxColour::MakeGrey(dest + 0, dest + 1, dest + 2, weight_r, weight_g, weight_b); + } + } + + // copy the alpha channel, if any + if (HasAlpha()) + { + const size_t alphaSize = GetWidth() * GetHeight(); + unsigned char *alpha = (unsigned char*)malloc(alphaSize); + memcpy(alpha, GetAlpha(), alphaSize); + image.InitAlpha(); + image.SetAlpha(alpha); + } + + return image; +} + +wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); + + unsigned char *data = image.GetData(); + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + if (M_IMGDATA->m_hasMask) + { + if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g && + M_IMGDATA->m_maskBlue == b) + image.SetMaskColour( 255, 255, 255 ); + else + image.SetMaskColour( 0, 0, 0 ); + } + + long size = M_IMGDATA->m_height * M_IMGDATA->m_width; + + unsigned char *srcd = M_IMGDATA->m_data; + unsigned char *tard = image.GetData(); + + for ( long i = 0; i < size; i++, srcd += 3, tard += 3 ) + { + bool on = (srcd[0] == r) && (srcd[1] == g) && (srcd[2] == b); + wxColourBase::MakeMono(tard + 0, tard + 1, tard + 2, on); + } + + return image; +} + +wxImage wxImage::ConvertToDisabled(unsigned char brightness) const +{ + wxImage image = *this; + + unsigned char mr = image.GetMaskRed(); + unsigned char mg = image.GetMaskGreen(); + unsigned char mb = image.GetMaskBlue(); + + int width = image.GetWidth(); + int height = image.GetHeight(); + bool has_mask = image.HasMask(); + + for (int y = height-1; y >= 0; --y) + { + for (int x = width-1; x >= 0; --x) + { + unsigned char* data = image.GetData() + (y*(width*3))+(x*3); + unsigned char* r = data; + unsigned char* g = data+1; + unsigned char* b = data+2; + + if (has_mask && (*r == mr) && (*g == mg) && (*b == mb)) + continue; + + wxColour::MakeDisabled(r, g, b, brightness); + } + } + return image; +} + +int wxImage::GetWidth() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_width; +} + +int wxImage::GetHeight() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_height; +} + +wxBitmapType wxImage::GetType() const +{ + wxCHECK_MSG( IsOk(), wxBITMAP_TYPE_INVALID, wxT("invalid image") ); + + return M_IMGDATA->m_type; +} + +void wxImage::SetType(wxBitmapType type) +{ + wxCHECK_RET( IsOk(), "must create the image before setting its type"); + + // type can be wxBITMAP_TYPE_INVALID to reset the image type to default + wxASSERT_MSG( type != wxBITMAP_TYPE_MAX, "invalid bitmap type" ); + + M_IMGDATA->m_type = type; +} + +long wxImage::XYToIndex(int x, int y) const +{ + if ( Ok() && + x >= 0 && y >= 0 && + x < M_IMGDATA->m_width && y < M_IMGDATA->m_height ) + { + return y*M_IMGDATA->m_width + x; + } + + return -1; +} + +void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) +{ + long pos = XYToIndex(x, y); + wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); + + AllocExclusive(); + + pos *= 3; + + M_IMGDATA->m_data[ pos ] = r; + M_IMGDATA->m_data[ pos+1 ] = g; + M_IMGDATA->m_data[ pos+2 ] = b; +} + +void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + wxRect rect(rect_); + wxRect imageRect(0, 0, GetWidth(), GetHeight()); + if ( rect == wxRect() ) + { + rect = imageRect; + } + else + { + wxCHECK_RET( imageRect.Contains(rect.GetTopLeft()) && + imageRect.Contains(rect.GetBottomRight()), + wxT("invalid bounding rectangle") ); + } + + int x1 = rect.GetLeft(), + y1 = rect.GetTop(), + x2 = rect.GetRight() + 1, + y2 = rect.GetBottom() + 1; + + unsigned char *data wxDUMMY_INITIALIZE(NULL); + int x, y, width = GetWidth(); + for (y = y1; y < y2; y++) + { + data = M_IMGDATA->m_data + (y*width + x1)*3; + for (x = x1; x < x2; x++) + { + *data++ = r; + *data++ = g; + *data++ = b; + } + } +} + +unsigned char wxImage::GetRed( int x, int y ) const +{ + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + pos *= 3; + + return M_IMGDATA->m_data[pos]; +} + +unsigned char wxImage::GetGreen( int x, int y ) const +{ + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + pos *= 3; + + return M_IMGDATA->m_data[pos+1]; +} + +unsigned char wxImage::GetBlue( int x, int y ) const +{ + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + pos *= 3; + + return M_IMGDATA->m_data[pos+2]; +} + +bool wxImage::IsOk() const +{ + // image of 0 width or height can't be considered ok - at least because it + // causes crashes in ConvertToBitmap() if we don't catch it in time + wxImageRefData *data = M_IMGDATA; + return data && data->m_ok && data->m_width && data->m_height; +} + +unsigned char *wxImage::GetData() const +{ + wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); + + return M_IMGDATA->m_data; +} + +void wxImage::SetData( unsigned char *data, bool static_data ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + wxImageRefData *newRefData = new wxImageRefData(); + + newRefData->m_width = M_IMGDATA->m_width; + newRefData->m_height = M_IMGDATA->m_height; + newRefData->m_data = data; + newRefData->m_ok = true; + newRefData->m_maskRed = M_IMGDATA->m_maskRed; + newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; + newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; + newRefData->m_hasMask = M_IMGDATA->m_hasMask; + newRefData->m_static = static_data; + + UnRef(); + + m_refData = newRefData; +} + +void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data ) +{ + wxImageRefData *newRefData = new wxImageRefData(); + + if (m_refData) + { + newRefData->m_width = new_width; + newRefData->m_height = new_height; + newRefData->m_data = data; + newRefData->m_ok = true; + newRefData->m_maskRed = M_IMGDATA->m_maskRed; + newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; + newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; + newRefData->m_hasMask = M_IMGDATA->m_hasMask; + } + else + { + newRefData->m_width = new_width; + newRefData->m_height = new_height; + newRefData->m_data = data; + newRefData->m_ok = true; + } + newRefData->m_static = static_data; + + UnRef(); + + m_refData = newRefData; +} + +// ---------------------------------------------------------------------------- +// alpha channel support +// ---------------------------------------------------------------------------- + +void wxImage::SetAlpha(int x, int y, unsigned char alpha) +{ + wxCHECK_RET( HasAlpha(), wxT("no alpha channel") ); + + long pos = XYToIndex(x, y); + wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); + + AllocExclusive(); + + M_IMGDATA->m_alpha[pos] = alpha; +} + +unsigned char wxImage::GetAlpha(int x, int y) const +{ + wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") ); + + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + return M_IMGDATA->m_alpha[pos]; +} + +bool +wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b) +{ + SetAlpha(NULL); + + const int w = M_IMGDATA->m_width; + const int h = M_IMGDATA->m_height; + + unsigned char *alpha = GetAlpha(); + unsigned char *data = GetData(); + + for ( int y = 0; y < h; y++ ) + { + for ( int x = 0; x < w; x++ ) + { + *alpha++ = *data; + *data++ = r; + *data++ = g; + *data++ = b; + } + } + + return true; +} + +void wxImage::SetAlpha( unsigned char *alpha, bool static_data ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + if ( !alpha ) + { + alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height); + } + + if( !M_IMGDATA->m_staticAlpha ) + free(M_IMGDATA->m_alpha); + + M_IMGDATA->m_alpha = alpha; + M_IMGDATA->m_staticAlpha = static_data; +} + +unsigned char *wxImage::GetAlpha() const +{ + wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); + + return M_IMGDATA->m_alpha; +} + +void wxImage::InitAlpha() +{ + wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") ); + + // initialize memory for alpha channel + SetAlpha(); + + unsigned char *alpha = M_IMGDATA->m_alpha; + const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height; + + if ( HasMask() ) + { + // use the mask to initialize the alpha channel. + const unsigned char * const alphaEnd = alpha + lenAlpha; + + const unsigned char mr = M_IMGDATA->m_maskRed; + const unsigned char mg = M_IMGDATA->m_maskGreen; + const unsigned char mb = M_IMGDATA->m_maskBlue; + for ( unsigned char *src = M_IMGDATA->m_data; + alpha < alphaEnd; + src += 3, alpha++ ) + { + *alpha = (src[0] == mr && src[1] == mg && src[2] == mb) + ? wxIMAGE_ALPHA_TRANSPARENT + : wxIMAGE_ALPHA_OPAQUE; + } + + M_IMGDATA->m_hasMask = false; + } + else // no mask + { + // make the image fully opaque + memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha); + } +} + +void wxImage::ClearAlpha() +{ + wxCHECK_RET( HasAlpha(), wxT("image already doesn't have an alpha channel") ); + + if ( !M_IMGDATA->m_staticAlpha ) + free( M_IMGDATA->m_alpha ); + + M_IMGDATA->m_alpha = NULL; +} + + +// ---------------------------------------------------------------------------- +// mask support +// ---------------------------------------------------------------------------- + +void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + M_IMGDATA->m_maskRed = r; + M_IMGDATA->m_maskGreen = g; + M_IMGDATA->m_maskBlue = b; + M_IMGDATA->m_hasMask = true; +} + +bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const +{ + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + if (M_IMGDATA->m_hasMask) + { + if (r) *r = M_IMGDATA->m_maskRed; + if (g) *g = M_IMGDATA->m_maskGreen; + if (b) *b = M_IMGDATA->m_maskBlue; + return true; + } + else + { + FindFirstUnusedColour(r, g, b); + return false; + } +} + +unsigned char wxImage::GetMaskRed() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_maskRed; +} + +unsigned char wxImage::GetMaskGreen() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_maskGreen; +} + +unsigned char wxImage::GetMaskBlue() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_maskBlue; +} + +void wxImage::SetMask( bool mask ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + M_IMGDATA->m_hasMask = mask; +} + +bool wxImage::HasMask() const +{ + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + return M_IMGDATA->m_hasMask; +} + +bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const +{ + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") ); + + // check mask + if ( M_IMGDATA->m_hasMask ) + { + const unsigned char *p = M_IMGDATA->m_data + 3*pos; + if ( p[0] == M_IMGDATA->m_maskRed && + p[1] == M_IMGDATA->m_maskGreen && + p[2] == M_IMGDATA->m_maskBlue ) + { + return true; + } + } + + // then check alpha + if ( M_IMGDATA->m_alpha ) + { + if ( M_IMGDATA->m_alpha[pos] < threshold ) + { + // transparent enough + return true; + } + } + + // not transparent + return false; +} + +bool wxImage::SetMaskFromImage(const wxImage& mask, + unsigned char mr, unsigned char mg, unsigned char mb) +{ + // check that the images are the same size + if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) ) + { + wxLogError( _("Image and mask have different sizes.") ); + return false; + } + + // find unused colour + unsigned char r,g,b ; + if (!FindFirstUnusedColour(&r, &g, &b)) + { + wxLogError( _("No unused colour in image being masked.") ); + return false ; + } -bool wxImage::LoadFile( wxInputStream& stream, long type ) -{ - UnRef(); + AllocExclusive(); - m_refData = new wxImageRefData; + unsigned char *imgdata = GetData(); + unsigned char *maskdata = mask.GetData(); - wxImageHandler *handler; + const int w = GetWidth(); + const int h = GetHeight(); - if (type==wxBITMAP_TYPE_ANY) + for (int j = 0; j < h; j++) { - wxList &list=GetHandlers(); - - for ( wxList::Node *node = list.GetFirst(); node; node = node->GetNext() ) + for (int i = 0; i < w; i++) { - handler=(wxImageHandler*)node->GetData(); - if (handler->CanRead( stream )) - return handler->LoadFile( this, stream ); - + if ((maskdata[0] == mr) && (maskdata[1] == mg) && (maskdata[2] == mb)) + { + imgdata[0] = r; + imgdata[1] = g; + imgdata[2] = b; + } + imgdata += 3; + maskdata += 3; } - - wxLogWarning( wxT("No handler found for this image.") ); - return FALSE; } - handler = FindHandler(type); + SetMaskColour(r, g, b); + SetMask(true); - if (handler == NULL) - { - wxLogWarning( wxT("No image handler for type %d defined."), type ); + return true; +} + +bool wxImage::ConvertAlphaToMask(unsigned char threshold) +{ + if ( !HasAlpha() ) + return true; - return FALSE; + unsigned char mr, mg, mb; + if ( !FindFirstUnusedColour(&mr, &mg, &mb) ) + { + wxLogError( _("No unused colour in image being masked.") ); + return false; } - return handler->LoadFile( this, stream ); + ConvertAlphaToMask(mr, mg, mb, threshold); + return true; } -bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype ) +void wxImage::ConvertAlphaToMask(unsigned char mr, + unsigned char mg, + unsigned char mb, + unsigned char threshold) { - UnRef(); + if ( !HasAlpha() ) + return; - m_refData = new wxImageRefData; + AllocExclusive(); - wxImageHandler *handler = FindHandlerMime(mimetype); + SetMask(true); + SetMaskColour(mr, mg, mb); - if (handler == NULL) - { - wxLogWarning( wxT("No image handler for type %s defined."), mimetype.GetData() ); + unsigned char *imgdata = GetData(); + unsigned char *alphadata = GetAlpha(); - return FALSE; + int w = GetWidth(); + int h = GetHeight(); + + for (int y = 0; y < h; y++) + { + for (int x = 0; x < w; x++, imgdata += 3, alphadata++) + { + if (*alphadata < threshold) + { + imgdata[0] = mr; + imgdata[1] = mg; + imgdata[2] = mb; + } + } } - return handler->LoadFile( this, stream ); + if ( !M_IMGDATA->m_staticAlpha ) + free(M_IMGDATA->m_alpha); + + M_IMGDATA->m_alpha = NULL; + M_IMGDATA->m_staticAlpha = false; } -bool wxImage::SaveFile( wxOutputStream& stream, int type ) -{ - wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") ); +// ---------------------------------------------------------------------------- +// Palette functions +// ---------------------------------------------------------------------------- - wxImageHandler *handler = FindHandler(type); +#if wxUSE_PALETTE - if (handler == NULL) - { - wxLogWarning( wxT("No image handler for type %d defined."), type ); +bool wxImage::HasPalette() const +{ + if (!Ok()) + return false; - return FALSE; - } + return M_IMGDATA->m_palette.Ok(); +} + +const wxPalette& wxImage::GetPalette() const +{ + wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") ); - return handler->SaveFile( this, stream ); + return M_IMGDATA->m_palette; } -bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) +void wxImage::SetPalette(const wxPalette& palette) { - wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") ); + wxCHECK_RET( Ok(), wxT("invalid image") ); - wxImageHandler *handler = FindHandlerMime(mimetype); + AllocExclusive(); - if (handler == NULL) - { - wxLogWarning( wxT("No image handler for type %s defined."), mimetype.GetData() ); + M_IMGDATA->m_palette = palette; +} + +#endif // wxUSE_PALETTE + +// ---------------------------------------------------------------------------- +// Option functions (arbitrary name/value mapping) +// ---------------------------------------------------------------------------- + +void wxImage::SetOption(const wxString& name, const wxString& value) +{ + AllocExclusive(); - return FALSE; + int idx = M_IMGDATA->m_optionNames.Index(name, false); + if ( idx == wxNOT_FOUND ) + { + M_IMGDATA->m_optionNames.Add(name); + M_IMGDATA->m_optionValues.Add(value); + } + else + { + M_IMGDATA->m_optionNames[idx] = name; + M_IMGDATA->m_optionValues[idx] = value; } +} - return handler->SaveFile( this, stream ); +void wxImage::SetOption(const wxString& name, int value) +{ + wxString valStr; + valStr.Printf(wxT("%d"), value); + SetOption(name, valStr); } -#endif // wxUSE_STREAMS -void wxImage::AddHandler( wxImageHandler *handler ) +wxString wxImage::GetOption(const wxString& name) const { - // make sure that the memory will be freed at the program end - sm_handlers.DeleteContents(TRUE); + if ( !M_IMGDATA ) + return wxEmptyString; - sm_handlers.Append( handler ); + int idx = M_IMGDATA->m_optionNames.Index(name, false); + if ( idx == wxNOT_FOUND ) + return wxEmptyString; + else + return M_IMGDATA->m_optionValues[idx]; } -void wxImage::InsertHandler( wxImageHandler *handler ) +int wxImage::GetOptionInt(const wxString& name) const { - // make sure that the memory will be freed at the program end - sm_handlers.DeleteContents(TRUE); + return wxAtoi(GetOption(name)); +} - sm_handlers.Insert( handler ); +bool wxImage::HasOption(const wxString& name) const +{ + return M_IMGDATA ? M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND + : false; } -bool wxImage::RemoveHandler( const wxString& name ) +// ---------------------------------------------------------------------------- +// image I/O +// ---------------------------------------------------------------------------- + +bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + wxBitmapType WXUNUSED_UNLESS_STREAMS(type), + int WXUNUSED_UNLESS_STREAMS(index) ) { - wxImageHandler *handler = FindHandler(name); - if (handler) +#if HAS_FILE_STREAMS + if (wxFileExists(filename)) { - sm_handlers.DeleteObject(handler); - return TRUE; + wxImageFileInputStream stream(filename); + wxBufferedInputStream bstream( stream ); + return LoadFile(bstream, type, index); } else - return FALSE; + { + wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); + + return false; + } +#else // !HAS_FILE_STREAMS + return false; +#endif // HAS_FILE_STREAMS } -wxImageHandler *wxImage::FindHandler( const wxString& name ) +bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + const wxString& WXUNUSED_UNLESS_STREAMS(mimetype), + int WXUNUSED_UNLESS_STREAMS(index) ) { - wxNode *node = sm_handlers.First(); - while (node) +#if HAS_FILE_STREAMS + if (wxFileExists(filename)) { - wxImageHandler *handler = (wxImageHandler*)node->Data(); - if (handler->GetName().Cmp(name) == 0) return handler; + wxImageFileInputStream stream(filename); + wxBufferedInputStream bstream( stream ); + return LoadFile(bstream, mimetype, index); + } + else + { + wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); - node = node->Next(); + return false; } - return (wxImageHandler *)NULL; +#else // !HAS_FILE_STREAMS + return false; +#endif // HAS_FILE_STREAMS } -wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType ) + +bool wxImage::SaveFile( const wxString& filename ) const { - wxNode *node = sm_handlers.First(); - while (node) + wxString ext = filename.AfterLast('.').Lower(); + + wxImageHandler *handler = FindHandler(ext, wxBITMAP_TYPE_ANY); + if ( !handler) { - wxImageHandler *handler = (wxImageHandler*)node->Data(); - if ( (handler->GetExtension().Cmp(extension) == 0) && - (bitmapType == -1 || handler->GetType() == bitmapType) ) - return handler; - node = node->Next(); + wxLogError(_("Can't save image to file '%s': unknown extension."), + filename); + return false; } - return (wxImageHandler*)NULL; + + return SaveFile(filename, handler->GetType()); } -wxImageHandler *wxImage::FindHandler( long bitmapType ) +bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + wxBitmapType WXUNUSED_UNLESS_STREAMS(type) ) const { - wxNode *node = sm_handlers.First(); - while (node) +#if HAS_FILE_STREAMS + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); + + wxImageFileOutputStream stream(filename); + + if ( stream.IsOk() ) { - wxImageHandler *handler = (wxImageHandler *)node->Data(); - if (handler->GetType() == bitmapType) return handler; - node = node->Next(); + wxBufferedOutputStream bstream( stream ); + return SaveFile(bstream, type); } - return NULL; +#endif // HAS_FILE_STREAMS + + return false; } -wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) +bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const { - wxNode *node = sm_handlers.First(); - while (node) +#if HAS_FILE_STREAMS + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); + + wxImageFileOutputStream stream(filename); + + if ( stream.IsOk() ) { - wxImageHandler *handler = (wxImageHandler *)node->Data(); - if (handler->GetMimeType().IsSameAs(mimetype, FALSE)) return handler; - node = node->Next(); + wxBufferedOutputStream bstream( stream ); + return SaveFile(bstream, mimetype); } - return NULL; +#endif // HAS_FILE_STREAMS + + return false; } -void wxImage::InitStandardHandlers() +bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) ) { - AddHandler( new wxBMPHandler ); +#if HAS_FILE_STREAMS + wxImageFileInputStream stream(name); + return CanRead(stream); +#else + return false; +#endif } -void wxImage::CleanUpHandlers() +int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name), + wxBitmapType WXUNUSED_UNLESS_STREAMS(type) ) { - wxNode *node = sm_handlers.First(); - while (node) +#if HAS_FILE_STREAMS + wxImageFileInputStream stream(name); + if (stream.Ok()) + return GetImageCount(stream, type); +#endif + + return 0; +} + +#if wxUSE_STREAMS + +bool wxImage::CanRead( wxInputStream &stream ) +{ + const wxList& list = GetHandlers(); + + for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) { - wxImageHandler *handler = (wxImageHandler *)node->Data(); - wxNode *next = node->Next(); - delete handler; - delete node; - node = next; + wxImageHandler *handler=(wxImageHandler*)node->GetData(); + if (handler->CanRead( stream )) + return true; } + + return false; } -//----------------------------------------------------------------------------- -// wxImageHandler -//----------------------------------------------------------------------------- +int wxImage::GetImageCount( wxInputStream &stream, wxBitmapType type ) +{ + wxImageHandler *handler; -#if !USE_SHARED_LIBRARIES -IMPLEMENT_DYNAMIC_CLASS(wxImageHandler,wxObject) -#endif + if ( type == wxBITMAP_TYPE_ANY ) + { + const wxList& list = GetHandlers(); -#if wxUSE_STREAMS -bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) -{ - return FALSE; + for ( wxList::compatibility_iterator node = list.GetFirst(); + node; + node = node->GetNext() ) + { + handler = (wxImageHandler*)node->GetData(); + if ( handler->CanRead(stream) ) + { + const int count = handler->GetImageCount(stream); + if ( count >= 0 ) + return count; + } + + } + + wxLogWarning(_("No handler found for image type.")); + return 0; + } + + handler = FindHandler(type); + + if ( !handler ) + { + wxLogWarning(_("No image handler for type %ld defined."), type); + return false; + } + + if ( handler->CanRead(stream) ) + { + return handler->GetImageCount(stream); + } + else + { + wxLogError(_("Image file is not of type %ld."), type); + return 0; + } } -bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) +bool wxImage::DoLoad(wxImageHandler& handler, wxInputStream& stream, int index) { - return FALSE; + // save the options values which can be clobbered by the handler (e.g. many + // of them call Destroy() before trying to load the file) + const unsigned maxWidth = GetOptionInt(wxIMAGE_OPTION_MAX_WIDTH), + maxHeight = GetOptionInt(wxIMAGE_OPTION_MAX_HEIGHT); + + if ( !handler.LoadFile(this, stream, true/*verbose*/, index) ) + return false; + + // rescale the image to the specified size if needed + if ( maxWidth || maxHeight ) + { + const unsigned widthOrig = GetWidth(), + heightOrig = GetHeight(); + + // this uses the same (trivial) algorithm as the JPEG handler + unsigned width = widthOrig, + height = heightOrig; + while ( (maxWidth && width > maxWidth) || + (maxHeight && height > maxHeight) ) + { + width /= 2; + height /= 2; + } + + if ( width != widthOrig || height != heightOrig ) + Rescale(width, height, wxIMAGE_QUALITY_HIGH); + } + + // Set this after Rescale, which currently does not preserve it + M_IMGDATA->m_type = handler.GetType(); + + return true; } -bool wxImageHandler::CanRead( const wxString& name ) +bool wxImage::LoadFile( wxInputStream& stream, wxBitmapType type, int index ) { -#if wxUSE_STREAMS - if (wxFileExists(name)) + AllocExclusive(); + + wxImageHandler *handler; + + if ( type == wxBITMAP_TYPE_ANY ) { - wxFileInputStream stream(name); - return CanRead(stream); + const wxList& list = GetHandlers(); + for ( wxList::compatibility_iterator node = list.GetFirst(); + node; + node = node->GetNext() ) + { + handler = (wxImageHandler*)node->GetData(); + if ( handler->CanRead(stream) && DoLoad(*handler, stream, index) ) + return true; + } + + wxLogWarning( _("No handler found for image type.") ); + + return false; } + //else: have specific type - else { - wxLogError( wxT("Can't check image format of file '%s': file does not exist."), name.c_str() ); + handler = FindHandler(type); + if ( !handler ) + { + wxLogWarning( _("No image handler for type %ld defined."), type ); + return false; + } - return FALSE; + if ( stream.IsSeekable() && !handler->CanRead(stream) ) + { + wxLogError(_("Image file is not of type %ld."), type); + return false; } -#else // !wxUSE_STREAMS - return FALSE; -#endif // wxUSE_STREAMS + + return DoLoad(*handler, stream, index); +} + +bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index ) +{ + UnRef(); + + m_refData = new wxImageRefData; + + wxImageHandler *handler = FindHandlerMime(mimetype); + + if ( !handler ) + { + wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); + return false; + } + + if ( stream.IsSeekable() && !handler->CanRead(stream) ) + { + wxLogError(_("Image file is not of type %s."), mimetype); + return false; + } + + return DoLoad(*handler, stream, index); } +bool wxImage::DoSave(wxImageHandler& handler, wxOutputStream& stream) const +{ + wxImage * const self = const_cast(this); + if ( !handler.SaveFile(self, stream) ) + return false; + M_IMGDATA->m_type = handler.GetType(); + return true; +} -#endif // wxUSE_STREAMS +bool wxImage::SaveFile( wxOutputStream& stream, wxBitmapType type ) const +{ + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); -//----------------------------------------------------------------------------- -// MSW conversion routines -//----------------------------------------------------------------------------- + wxImageHandler *handler = FindHandler(type); + if ( !handler ) + { + wxLogWarning( _("No image handler for type %d defined."), type ); + return false; + } -#ifdef __WXMSW__ + return DoSave(*handler, stream); +} -wxBitmap wxImage::ConvertToBitmap() const +bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const { - if ( !Ok() ) - return wxNullBitmap; + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); - // sizeLimit is the MS upper limit for the DIB size -#ifdef WIN32 - int sizeLimit = 1024*768*3; -#else - int sizeLimit = 0x7fff ; -#endif + wxImageHandler *handler = FindHandlerMime(mimetype); + if ( !handler ) + { + wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); + } + + return DoSave(*handler, stream); +} + +#endif // wxUSE_STREAMS - // width and height of the device-dependent bitmap - int width = GetWidth(); - int bmpHeight = GetHeight(); - - // calc the number of bytes per scanline and padding - int bytePerLine = width*3; - int sizeDWORD = sizeof( DWORD ); - int lineBoundary = bytePerLine % sizeDWORD; - int padding = 0; - if( lineBoundary > 0 ) - { - padding = sizeDWORD - lineBoundary; - bytePerLine += padding; - } - // calc the number of DIBs and heights of DIBs - int numDIB = 1; - int hRemain = 0; - int height = sizeLimit/bytePerLine; - if( height >= bmpHeight ) - height = bmpHeight; +// ---------------------------------------------------------------------------- +// image I/O handlers +// ---------------------------------------------------------------------------- + +void wxImage::AddHandler( wxImageHandler *handler ) +{ + // Check for an existing handler of the type being added. + if (FindHandler( handler->GetType() ) == 0) + { + sm_handlers.Append( handler ); + } else { - numDIB = bmpHeight / height; - hRemain = bmpHeight % height; - if( hRemain >0 ) numDIB++; - } - - // set bitmap parameters - wxBitmap bitmap; - wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") ); - bitmap.SetWidth( width ); - bitmap.SetHeight( bmpHeight ); - bitmap.SetDepth( wxDisplayDepth() ); - - // create a DIB header - int headersize = sizeof(BITMAPINFOHEADER); - LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); - wxCHECK_MSG( lpDIBh, bitmap, wxT("could not allocate memory for DIB header") ); - // Fill in the DIB header - lpDIBh->bmiHeader.biSize = headersize; - lpDIBh->bmiHeader.biWidth = (DWORD)width; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - // the general formula for biSizeImage: - // ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height; - lpDIBh->bmiHeader.biPlanes = 1; - lpDIBh->bmiHeader.biBitCount = 24; - lpDIBh->bmiHeader.biCompression = BI_RGB; - lpDIBh->bmiHeader.biClrUsed = 0; - // These seem not really needed for our purpose here. - lpDIBh->bmiHeader.biClrImportant = 0; - lpDIBh->bmiHeader.biXPelsPerMeter = 0; - lpDIBh->bmiHeader.biYPelsPerMeter = 0; - // memory for DIB data - unsigned char *lpBits; - lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage ); - if( !lpBits ) - { - wxFAIL_MSG( wxT("could not allocate memory for DIB") ); - free( lpDIBh ); - return bitmap; - } - - // create and set the device-dependent bitmap - HDC hdc = ::GetDC(NULL); - HDC memdc = ::CreateCompatibleDC( hdc ); - HBITMAP hbitmap; - hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight ); - ::SelectObject( memdc, hbitmap); - - // copy image data into DIB data and then into DDB (in a loop) - unsigned char *data = GetData(); - int i, j, n; - int origin = 0; - unsigned char *ptdata = data; - unsigned char *ptbits; + // This is not documented behaviour, merely the simplest 'fix' + // for preventing duplicate additions. If someone ever has + // a good reason to add and remove duplicate handlers (and they + // may) we should probably refcount the duplicates. + // also an issue in InsertHandler below. + + wxLogDebug( wxT("Adding duplicate image handler for '%s'"), + handler->GetName().c_str() ); + delete handler; + } +} - for( n=0; nGetType() ) == 0) { - if( numDIB > 1 && n == numDIB-1 && hRemain > 0 ) - { - // redefine height and size of the (possibly) last smaller DIB - // memory is not reallocated - height = hRemain; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - } - ptbits = lpBits; + sm_handlers.Insert( handler ); + } + else + { + // see AddHandler for additional comments. + wxLogDebug( wxT("Inserting duplicate image handler for '%s'"), + handler->GetName().c_str() ); + delete handler; + } +} - for( j=0; jbmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS ); - // The above line is equivalent to the following two lines. - // hbitmap = ::CreateCompatibleBitmap( hdc, width, height ); - // ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS); - // or the following lines - // hbitmap = ::CreateCompatibleBitmap( hdc, width, height ); - // HDC memdc = ::CreateCompatibleDC( hdc ); - // ::SelectObject( memdc, hbitmap); - // ::SetDIBitsToDevice( memdc, 0, 0, width, height, - // 0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS); - // ::SelectObject( memdc, 0 ); - // ::DeleteDC( memdc ); - } - bitmap.SetHBITMAP( (WXHBITMAP) hbitmap ); - - // similarly, created an mono-bitmap for the possible mask - if( HasMask() ) - { - hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL ); - ::SelectObject( memdc, hbitmap); - if( numDIB == 1 ) height = bmpHeight; - else height = sizeLimit/bytePerLine; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - origin = 0; - unsigned char r = GetMaskRed(); - unsigned char g = GetMaskGreen(); - unsigned char b = GetMaskBlue(); - unsigned char zero = 0, one = 255; - ptdata = data; - for( n=0; nGetData(); + if (handler->GetName().Cmp(name) == 0) return handler; + + node = node->GetNext(); + } + return NULL; +} + +wxImageHandler *wxImage::FindHandler( const wxString& extension, wxBitmapType bitmapType ) +{ + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) + { + wxImageHandler *handler = (wxImageHandler*)node->GetData(); + if ((bitmapType == wxBITMAP_TYPE_ANY) || (handler->GetType() == bitmapType)) { - if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 ) - { - // redefine height and size of the (possibly) last smaller DIB - // memory is not reallocated - height = hRemain; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - } - ptbits = lpBits; - for( int j=0; jGetExtension() == extension) + return handler; + if (handler->GetAltExtensions().Index(extension, false) != wxNOT_FOUND) + return handler; } - // create a wxMask object - wxMask *mask = new wxMask(); - mask->SetMaskBitmap( (WXHBITMAP) hbitmap ); - bitmap.SetMask( mask ); - // It will be deleted when the wxBitmap object is deleted (as of 01/1999) - /* The following can also be used but is slow to run - wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue()); - wxMask *mask = new wxMask( bitmap, colour ); - bitmap.SetMask( mask ); - */ - } - - // free allocated resources - ::SelectObject( memdc, 0 ); - ::DeleteDC( memdc ); - ::ReleaseDC(NULL, hdc); - free(lpDIBh); - free(lpBits); - - // check the wxBitmap object - if( bitmap.GetHBITMAP() ) - bitmap.SetOk( TRUE ); - else - bitmap.SetOk( FALSE ); + node = node->GetNext(); + } + return NULL; +} - return bitmap; +wxImageHandler *wxImage::FindHandler(wxBitmapType bitmapType ) +{ + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) + { + wxImageHandler *handler = (wxImageHandler *)node->GetData(); + if (handler->GetType() == bitmapType) return handler; + node = node->GetNext(); + } + return NULL; } -wxImage::wxImage( const wxBitmap &bitmap ) +wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) { - // check the bitmap - if( !bitmap.Ok() ) + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) { - wxFAIL_MSG( wxT("invalid bitmap") ); - return; + wxImageHandler *handler = (wxImageHandler *)node->GetData(); + if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler; + node = node->GetNext(); } + return NULL; +} - // create an wxImage object - int width = bitmap.GetWidth(); - int height = bitmap.GetHeight(); - Create( width, height ); - unsigned char *data = GetData(); - if( !data ) +void wxImage::InitStandardHandlers() +{ +#if wxUSE_STREAMS + AddHandler(new wxBMPHandler); +#endif // wxUSE_STREAMS +} + +void wxImage::CleanUpHandlers() +{ + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) { - wxFAIL_MSG( wxT("could not allocate data for image") ); - return; + wxImageHandler *handler = (wxImageHandler *)node->GetData(); + wxList::compatibility_iterator next = node->GetNext(); + delete handler; + node = next; } - // calc the number of bytes per scanline and padding in the DIB - int bytePerLine = width*3; - int sizeDWORD = sizeof( DWORD ); - int lineBoundary = bytePerLine % sizeDWORD; - int padding = 0; - if( lineBoundary > 0 ) + sm_handlers.Clear(); +} + +wxString wxImage::GetImageExtWildcard() +{ + wxString fmts; + + wxList& Handlers = wxImage::GetHandlers(); + wxList::compatibility_iterator Node = Handlers.GetFirst(); + while ( Node ) { - padding = sizeDWORD - lineBoundary; - bytePerLine += padding; + wxImageHandler* Handler = (wxImageHandler*)Node->GetData(); + fmts += wxT("*.") + Handler->GetExtension(); + for (size_t i = 0; i < Handler->GetAltExtensions().size(); i++) + fmts += wxT(";*.") + Handler->GetAltExtensions()[i]; + Node = Node->GetNext(); + if ( Node ) fmts += wxT(";"); } - // create a DIB header - int headersize = sizeof(BITMAPINFOHEADER); - LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); - if( !lpDIBh ) + return wxT("(") + fmts + wxT(")|") + fmts; +} + +wxImage::HSVValue wxImage::RGBtoHSV(const RGBValue& rgb) +{ + const double red = rgb.red / 255.0, + green = rgb.green / 255.0, + blue = rgb.blue / 255.0; + + // find the min and max intensity (and remember which one was it for the + // latter) + double minimumRGB = red; + if ( green < minimumRGB ) + minimumRGB = green; + if ( blue < minimumRGB ) + minimumRGB = blue; + + enum { RED, GREEN, BLUE } chMax = RED; + double maximumRGB = red; + if ( green > maximumRGB ) { - wxFAIL_MSG( wxT("could not allocate data for DIB header") ); - free( data ); - return; + chMax = GREEN; + maximumRGB = green; } - // Fill in the DIB header - lpDIBh->bmiHeader.biSize = headersize; - lpDIBh->bmiHeader.biWidth = width; - lpDIBh->bmiHeader.biHeight = -height; - lpDIBh->bmiHeader.biSizeImage = bytePerLine * height; - lpDIBh->bmiHeader.biPlanes = 1; - lpDIBh->bmiHeader.biBitCount = 24; - lpDIBh->bmiHeader.biCompression = BI_RGB; - lpDIBh->bmiHeader.biClrUsed = 0; - // These seem not really needed for our purpose here. - lpDIBh->bmiHeader.biClrImportant = 0; - lpDIBh->bmiHeader.biXPelsPerMeter = 0; - lpDIBh->bmiHeader.biYPelsPerMeter = 0; - // memory for DIB data - unsigned char *lpBits; - lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage ); - if( !lpBits ) - { - wxFAIL_MSG( wxT("could not allocate data for DIB") ); - free( data ); - free( lpDIBh ); - return; + if ( blue > maximumRGB ) + { + chMax = BLUE; + maximumRGB = blue; } - // copy data from the device-dependent bitmap to the DIB - HDC hdc = ::GetDC(NULL); - HBITMAP hbitmap; - hbitmap = (HBITMAP) bitmap.GetHBITMAP(); - ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); + const double value = maximumRGB; - // copy DIB data into the wxImage object - int i, j; - unsigned char *ptdata = data; - unsigned char *ptbits = lpBits; - for( i=0; iGetMaskBitmap() ) - { - hbitmap = (HBITMAP) bitmap.GetMask()->GetMaskBitmap(); - // memory DC created, color set, data copied, and memory DC deleted - HDC memdc = ::CreateCompatibleDC( hdc ); - ::SetTextColor( memdc, RGB( 0, 0, 0 ) ); - ::SetBkColor( memdc, RGB( 255, 255, 255 ) ); - ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); - ::DeleteDC( memdc ); - // background color set to RGB(16,16,16) in consistent with wxGTK - unsigned char r=16, g=16, b=16; - ptdata = data; - ptbits = lpBits; - for( i=0; i 0) -#include "gdk/gdkrgb.h" -#endif - -wxBitmap wxImage::ConvertToBitmap() const -{ - wxBitmap bitmap; - - wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") ); + switch ( chMax ) + { + case RED: + hue = (green - blue) / deltaRGB; + break; - int width = GetWidth(); - int height = GetHeight(); + case GREEN: + hue = 2.0 + (blue - red) / deltaRGB; + break; - bitmap.SetHeight( height ); - bitmap.SetWidth( width ); + case BLUE: + hue = 4.0 + (red - green) / deltaRGB; + break; - bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) ); + default: + wxFAIL_MSG(wxT("hue not specified")); + break; + } - // Retrieve depth + hue /= 6.0; - GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() ); - if (visual == NULL) visual = gdk_visual_get_system(); - int bpp = visual->depth; + if ( hue < 0.0 ) + hue += 1.0; - bitmap.SetDepth( bpp ); + saturation = deltaRGB / maximumRGB; + } - if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15; - if (bpp < 8) bpp = 8; + return HSVValue(hue, saturation, value); +} -#if (GTK_MINOR_VERSION > 0) +wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv) +{ + double red, green, blue; - if (!HasMask() && (bpp > 8)) + if ( wxIsNullDouble(hsv.saturation) ) { - static bool s_hasInitialized = FALSE; + // Grey + red = hsv.value; + green = hsv.value; + blue = hsv.value; + } + else // not grey + { + double hue = hsv.hue * 6.0; // sector 0 to 5 + int i = (int)floor(hue); + double f = hue - i; // fractional part of h + double p = hsv.value * (1.0 - hsv.saturation); - if (!s_hasInitialized) + switch (i) { - gdk_rgb_init(); - s_hasInitialized = TRUE; + case 0: + red = hsv.value; + green = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); + blue = p; + break; + + case 1: + red = hsv.value * (1.0 - hsv.saturation * f); + green = hsv.value; + blue = p; + break; + + case 2: + red = p; + green = hsv.value; + blue = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); + break; + + case 3: + red = p; + green = hsv.value * (1.0 - hsv.saturation * f); + blue = hsv.value; + break; + + case 4: + red = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); + green = p; + blue = hsv.value; + break; + + default: // case 5: + red = hsv.value; + green = p; + blue = hsv.value * (1.0 - hsv.saturation * f); + break; } + } - GdkGC *gc = gdk_gc_new( bitmap.GetPixmap() ); + return RGBValue((unsigned char)(red * 255.0), + (unsigned char)(green * 255.0), + (unsigned char)(blue * 255.0)); +} - gdk_draw_rgb_image( bitmap.GetPixmap(), - gc, - 0, 0, - width, height, - GDK_RGB_DITHER_NONE, - GetData(), - width*3 ); +/* + * Rotates the hue of each pixel of the image. angle is a double in the range + * -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees + */ +void wxImage::RotateHue(double angle) +{ + AllocExclusive(); - gdk_gc_unref( gc ); + unsigned char *srcBytePtr; + unsigned char *dstBytePtr; + unsigned long count; + wxImage::HSVValue hsv; + wxImage::RGBValue rgb; - return bitmap; + wxASSERT (angle >= -1.0 && angle <= 1.0); + count = M_IMGDATA->m_width * M_IMGDATA->m_height; + if ( count > 0 && !wxIsNullDouble(angle) ) + { + srcBytePtr = M_IMGDATA->m_data; + dstBytePtr = srcBytePtr; + do + { + rgb.red = *srcBytePtr++; + rgb.green = *srcBytePtr++; + rgb.blue = *srcBytePtr++; + hsv = RGBtoHSV(rgb); + + hsv.hue = hsv.hue + angle; + if (hsv.hue > 1.0) + hsv.hue = hsv.hue - 1.0; + else if (hsv.hue < 0.0) + hsv.hue = hsv.hue + 1.0; + + rgb = HSVtoRGB(hsv); + *dstBytePtr++ = rgb.red; + *dstBytePtr++ = rgb.green; + *dstBytePtr++ = rgb.blue; + } while (--count != 0); } +} -#endif +//----------------------------------------------------------------------------- +// wxImageHandler +//----------------------------------------------------------------------------- - // Create picture image +IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject) - GdkImage *data_image = - gdk_image_new( GDK_IMAGE_FASTEST, gdk_visual_get_system(), width, height ); +#if wxUSE_STREAMS +int wxImageHandler::GetImageCount( wxInputStream& stream ) +{ + // NOTE: this code is the same of wxAnimationDecoder::CanRead and + // wxImageHandler::CallDoCanRead - // Create mask image + if ( !stream.IsSeekable() ) + return false; // can't test unseekable stream - GdkImage *mask_image = (GdkImage*) NULL; + wxFileOffset posOld = stream.TellI(); + int n = DoGetImageCount(stream); - if (HasMask()) + // restore the old position to be able to test other formats and so on + if ( stream.SeekI(posOld) == wxInvalidOffset ) { - unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height ); - - mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height ); + wxLogDebug(wxT("Failed to rewind the stream in wxImageHandler!")); - wxMask *mask = new wxMask(); - mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 ); - - bitmap.SetMask( mask ); + // reading would fail anyhow as we're not at the right position + return false; } - // Render - - enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR }; - byte_order b_o = RGB; + return n; +} - if (bpp >= 24) +bool wxImageHandler::CanRead( const wxString& name ) +{ + if (wxFileExists(name)) { - GdkVisual *visual = gdk_visual_get_system(); - if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask)) b_o = RGB; - else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask)) b_o = RGB; - else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask)) b_o = BRG; - else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR; - else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask)) b_o = GRB; - else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask)) b_o = GBR; + wxImageFileInputStream stream(name); + return CanRead(stream); } - int r_mask = GetMaskRed(); - int g_mask = GetMaskGreen(); - int b_mask = GetMaskBlue(); - - unsigned char* data = GetData(); - - int index = 0; - for (int y = 0; y < height; y++) - { - for (int x = 0; x < width; x++) - { - int r = data[index]; - index++; - int g = data[index]; - index++; - int b = data[index]; - index++; - - if (HasMask()) - { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); - } - - if (HasMask()) - { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); - } - - switch (bpp) - { - case 8: - { - int pixel = -1; - if (wxTheApp->m_colorCube) - { - pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ]; - } - else - { - GdkColormap *cmap = gtk_widget_get_default_colormap(); - GdkColor *colors = cmap->colors; - int max = 3 * (65536); - - for (int i = 0; i < cmap->size; i++) - { - int rdiff = (r << 8) - colors[i].red; - int gdiff = (g << 8) - colors[i].green; - int bdiff = (b << 8) - colors[i].blue; - int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff); - if (sum < max) { pixel = i; max = sum; } - } - } - - gdk_image_put_pixel( data_image, x, y, pixel ); - - break; - } - case 15: - { - guint32 pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); - gdk_image_put_pixel( data_image, x, y, pixel ); - break; - } - case 16: - { - guint32 pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); - gdk_image_put_pixel( data_image, x, y, pixel ); - break; - } - case 32: - case 24: - { - guint32 pixel = 0; - switch (b_o) - { - case RGB: pixel = (r << 16) | (g << 8) | b; break; - case RBG: pixel = (r << 16) | (b << 8) | g; break; - case BRG: pixel = (b << 16) | (r << 8) | g; break; - case BGR: pixel = (b << 16) | (g << 8) | r; break; - case GRB: pixel = (g << 16) | (r << 8) | b; break; - case GBR: pixel = (g << 16) | (b << 8) | r; break; - } - gdk_image_put_pixel( data_image, x, y, pixel ); - } - default: break; - } - } // for - } // for - - // Blit picture + wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() ); - GdkGC *data_gc = gdk_gc_new( bitmap.GetPixmap() ); + return false; +} - gdk_draw_image( bitmap.GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height ); +bool wxImageHandler::CallDoCanRead(wxInputStream& stream) +{ + // NOTE: this code is the same of wxAnimationDecoder::CanRead and + // wxImageHandler::GetImageCount - gdk_image_destroy( data_image ); - gdk_gc_unref( data_gc ); + if ( !stream.IsSeekable() ) + return false; // can't test unseekable stream - // Blit mask + wxFileOffset posOld = stream.TellI(); + bool ok = DoCanRead(stream); - if (HasMask()) + // restore the old position to be able to test other formats and so on + if ( stream.SeekI(posOld) == wxInvalidOffset ) { - GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() ); - - gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height ); + wxLogDebug(wxT("Failed to rewind the stream in wxImageHandler!")); - gdk_image_destroy( mask_image ); - gdk_gc_unref( mask_gc ); + // reading would fail anyhow as we're not at the right position + return false; } - return bitmap; + return ok; } -wxImage::wxImage( const wxBitmap &bitmap ) -{ - wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") ); - - GdkImage *gdk_image = gdk_image_get( bitmap.GetPixmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight() ); - - wxCHECK_RET( gdk_image, wxT("couldn't create image") ); +#endif // wxUSE_STREAMS - Create( bitmap.GetWidth(), bitmap.GetHeight() ); - char unsigned *data = GetData(); +/* static */ +wxImageResolution +wxImageHandler::GetResolutionFromOptions(const wxImage& image, int *x, int *y) +{ + wxCHECK_MSG( x && y, wxIMAGE_RESOLUTION_NONE, wxT("NULL pointer") ); - if (!data) + if ( image.HasOption(wxIMAGE_OPTION_RESOLUTIONX) && + image.HasOption(wxIMAGE_OPTION_RESOLUTIONY) ) { - gdk_image_destroy( gdk_image ); - wxFAIL_MSG( wxT("couldn't create image") ); - return; + *x = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX); + *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); } - - GdkImage *gdk_image_mask = (GdkImage*) NULL; - if (bitmap.GetMask()) + else if ( image.HasOption(wxIMAGE_OPTION_RESOLUTION) ) + { + *x = + *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTION); + } + else // no resolution options specified { - gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight() ); + *x = + *y = 0; + + return wxIMAGE_RESOLUTION_NONE; + } - SetMaskColour( 16, 16, 16 ); // anything unlikely and dividable + // get the resolution unit too + int resUnit = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT); + if ( !resUnit ) + { + // this is the default + resUnit = wxIMAGE_RESOLUTION_INCHES; } - GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() ); - if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent ); - int bpp = visual->depth; - if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15; + return (wxImageResolution)resUnit; +} - GdkColormap *cmap = gtk_widget_get_default_colormap(); +// ---------------------------------------------------------------------------- +// image histogram stuff +// ---------------------------------------------------------------------------- + +bool +wxImageHistogram::FindFirstUnusedColour(unsigned char *r, + unsigned char *g, + unsigned char *b, + unsigned char r2, + unsigned char b2, + unsigned char g2) const +{ + unsigned long key = MakeKey(r2, g2, b2); - long pos = 0; - for (int j = 0; j < bitmap.GetHeight(); j++) + while ( find(key) != end() ) { - for (int i = 0; i < bitmap.GetWidth(); i++) + // color already used + r2++; + if ( r2 >= 255 ) { - wxInt32 pixel = gdk_image_get_pixel( gdk_image, i, j ); - pixel = wxINT32_SWAP_ON_BE( pixel ); - if (bpp <= 8) + r2 = 0; + g2++; + if ( g2 >= 255 ) { - data[pos] = cmap->colors[pixel].red >> 8; - data[pos+1] = cmap->colors[pixel].green >> 8; - data[pos+2] = cmap->colors[pixel].blue >> 8; - } else if (bpp == 15) - { - data[pos] = (pixel >> 7) & 0xf8; - data[pos+1] = (pixel >> 2) & 0xf8; - data[pos+2] = (pixel << 3) & 0xf8; - } else if (bpp == 16) - { - data[pos] = (pixel >> 8) & 0xf8; - data[pos+1] = (pixel >> 3) & 0xfc; - data[pos+2] = (pixel << 3) & 0xf8; - } else - { - data[pos] = (pixel >> 16) & 0xff; - data[pos+1] = (pixel >> 8) & 0xff; - data[pos+2] = pixel & 0xff; - } - - if (gdk_image_mask) - { - int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j ); - if (mask_pixel == 0) + g2 = 0; + b2++; + if ( b2 >= 255 ) { - data[pos] = 16; - data[pos+1] = 16; - data[pos+2] = 16; + wxLogError(_("No unused colour in image.") ); + return false; } } - - pos += 3; } + + key = MakeKey(r2, g2, b2); } - gdk_image_destroy( gdk_image ); - if (gdk_image_mask) gdk_image_destroy( gdk_image_mask ); + if ( r ) + *r = r2; + if ( g ) + *g = g2; + if ( b ) + *b = b2; + + return true; } -#endif +bool +wxImage::FindFirstUnusedColour(unsigned char *r, + unsigned char *g, + unsigned char *b, + unsigned char r2, + unsigned char b2, + unsigned char g2) const +{ + wxImageHistogram histogram; -//----------------------------------------------------------------------------- -// Motif conversion routines -//----------------------------------------------------------------------------- + ComputeHistogram(histogram); + + return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2); +} -#ifdef __WXMOTIF__ -#include -#include "wx/utils.h" -#include -wxBitmap wxImage::ConvertToBitmap() const +// GRG, Dic/99 +// Counts and returns the number of different colours. Optionally stops +// when it exceeds 'stopafter' different colours. This is useful, for +// example, to see if the image can be saved as 8-bit (256 colour or +// less, in this case it would be invoked as CountColours(256)). Default +// value for stopafter is -1 (don't care). +// +unsigned long wxImage::CountColours( unsigned long stopafter ) const { - wxBitmap bitmap; + wxHashTable h; + wxObject dummy; + unsigned char r, g, b; + unsigned char *p; + unsigned long size, nentries, key; - wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") ); + p = GetData(); + size = GetWidth() * GetHeight(); + nentries = 0; - int width = GetWidth(); - int height = GetHeight(); + for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++) + { + r = *(p++); + g = *(p++); + b = *(p++); + key = wxImageHistogram::MakeKey(r, g, b); - bitmap.SetHeight( height ); - bitmap.SetWidth( width ); + if (h.Get(key) == NULL) + { + h.Put(key, &dummy); + nentries++; + } + } - Display *dpy = (Display*) wxGetDisplay(); - Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) ); - int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) ); + return nentries; +} - // Create image - XImage *data_image = XCreateImage( dpy, vis, bpp, ZPixmap, 0, 0, width, height, 32, 0 ); - data_image->data = (char*) malloc( data_image->bytes_per_line * data_image->height ); +unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const +{ + unsigned char *p = GetData(); + unsigned long nentries = 0; - bitmap.Create( width, height, bpp ); + h.clear(); - /* - // Create mask + const unsigned long size = GetWidth() * GetHeight(); - GdkImage *mask_image = (GdkImage*) NULL; + unsigned char r, g, b; + for ( unsigned long n = 0; n < size; n++ ) + { + r = *p++; + g = *p++; + b = *p++; - if (HasMask()) - { - unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height ); + wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)]; - mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height ); + if ( entry.value++ == 0 ) + entry.index = nentries++; + } - wxMask *mask = new wxMask(); - mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 ); + return nentries; +} - bitmap.SetMask( mask ); - } - */ +/* + * Rotation code by Carlos Moreno + */ - // Retrieve depth info +static const double wxROTATE_EPSILON = 1e-10; - XVisualInfo vinfo_template; - XVisualInfo *vi; +// Auxiliary function to rotate a point (x,y) with respect to point p0 +// make it inline and use a straight return to facilitate optimization +// also, the function receives the sine and cosine of the angle to avoid +// repeating the time-consuming calls to these functions -- sin/cos can +// be computed and stored in the calling function. - vinfo_template.visual = vis; - vinfo_template.visualid = XVisualIDFromVisual( vis ); - vinfo_template.depth = bpp; - int nitem = 0; +static inline wxRealPoint +wxRotatePoint(const wxRealPoint& p, double cos_angle, double sin_angle, + const wxRealPoint& p0) +{ + return wxRealPoint(p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle, + p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle); +} - vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem ); +static inline wxRealPoint +wxRotatePoint(double x, double y, double cos_angle, double sin_angle, + const wxRealPoint & p0) +{ + return wxRotatePoint (wxRealPoint(x,y), cos_angle, sin_angle, p0); +} - wxCHECK_MSG( vi, wxNullBitmap, wxT("no visual") ); +wxImage wxImage::Rotate(double angle, + const wxPoint& centre_of_rotation, + bool interpolating, + wxPoint *offset_after_rotation) const +{ + // screen coordinates are a mirror image of "real" coordinates + angle = -angle; - XFree( vi ); + const bool has_alpha = HasAlpha(); - if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15; - if (bpp < 8) bpp = 8; + const int w = GetWidth(); + const int h = GetHeight(); - // Render + int i; - enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR }; - byte_order b_o = RGB; + // Create pointer-based array to accelerate access to wxImage's data + unsigned char ** data = new unsigned char * [h]; + data[0] = GetData(); + for (i = 1; i < h; i++) + data[i] = data[i - 1] + (3 * w); - if (bpp >= 24) + // Same for alpha channel + unsigned char ** alpha = NULL; + if (has_alpha) { - if ((vi->red_mask > vi->green_mask) && (vi->green_mask > vi->blue_mask)) b_o = RGB; - else if ((vi->red_mask > vi->blue_mask) && (vi->blue_mask > vi->green_mask)) b_o = RGB; - else if ((vi->blue_mask > vi->red_mask) && (vi->red_mask > vi->green_mask)) b_o = BRG; - else if ((vi->blue_mask > vi->green_mask) && (vi->green_mask > vi->red_mask)) b_o = BGR; - else if ((vi->green_mask > vi->red_mask) && (vi->red_mask > vi->blue_mask)) b_o = GRB; - else if ((vi->green_mask > vi->blue_mask) && (vi->blue_mask > vi->red_mask)) b_o = GBR; + alpha = new unsigned char * [h]; + alpha[0] = GetAlpha(); + for (i = 1; i < h; i++) + alpha[i] = alpha[i - 1] + w; } - /* - int r_mask = GetMaskRed(); - int g_mask = GetMaskGreen(); - int b_mask = GetMaskBlue(); - */ + // precompute coefficients for rotation formula + const double cos_angle = cos(angle); + const double sin_angle = sin(angle); + + // Create new Image to store the result + // First, find rectangle that covers the rotated image; to do that, + // rotate the four corners + + const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y); - XColor colors[256]; - if (bpp == 8) + wxRealPoint p1 = wxRotatePoint (0, 0, cos_angle, sin_angle, p0); + wxRealPoint p2 = wxRotatePoint (0, h, cos_angle, sin_angle, p0); + wxRealPoint p3 = wxRotatePoint (w, 0, cos_angle, sin_angle, p0); + wxRealPoint p4 = wxRotatePoint (w, h, cos_angle, sin_angle, p0); + + int x1a = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x))); + int y1a = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y))); + int x2a = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x))); + int y2a = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y))); + + // Create rotated image + wxImage rotated (x2a - x1a + 1, y2a - y1a + 1, false); + // With alpha channel + if (has_alpha) + rotated.SetAlpha(); + + if (offset_after_rotation != NULL) { - Colormap cmap = (Colormap) wxTheApp->GetMainColormap( dpy ); + *offset_after_rotation = wxPoint (x1a, y1a); + } - for (int i = 0; i < 256; i++) colors[i].pixel = i; - XQueryColors( dpy, cmap, colors, 256 ); + // the rotated (destination) image is always accessed sequentially via this + // pointer, there is no need for pointer-based arrays here + unsigned char *dst = rotated.GetData(); + + unsigned char *alpha_dst = has_alpha ? rotated.GetAlpha() : NULL; + + // if the original image has a mask, use its RGB values as the blank pixel, + // else, fall back to default (black). + unsigned char blank_r = 0; + unsigned char blank_g = 0; + unsigned char blank_b = 0; + + if (HasMask()) + { + blank_r = GetMaskRed(); + blank_g = GetMaskGreen(); + blank_b = GetMaskBlue(); + rotated.SetMaskColour( blank_r, blank_g, blank_b ); } - unsigned char* data = GetData(); + // Now, for each point of the rotated image, find where it came from, by + // performing an inverse rotation (a rotation of -angle) and getting the + // pixel at those coordinates + + const int rH = rotated.GetHeight(); + const int rW = rotated.GetWidth(); - int index = 0; - for (int y = 0; y < height; y++) + // do the (interpolating) test outside of the loops, so that it is done + // only once, instead of repeating it for each pixel. + if (interpolating) { - for (int x = 0; x < width; x++) + for (int y = 0; y < rH; y++) { - int r = data[index]; - index++; - int g = data[index]; - index++; - int b = data[index]; - index++; - - /* - if (HasMask()) + for (int x = 0; x < rW; x++) { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); - } - */ + wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); - switch (bpp) - { - case 8: + if (-0.25 < src.x && src.x < w - 0.75 && + -0.25 < src.y && src.y < h - 0.75) { - int pixel = -1; - /* - if (wxTheApp->m_colorCube) + // interpolate using the 4 enclosing grid-points. Those + // points can be obtained using floor and ceiling of the + // exact coordinates of the point + int x1, y1, x2, y2; + + if (0 < src.x && src.x < w - 1) { - pixel = wxTheApp->m_colorCube - [ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ]; + x1 = wxRound(floor(src.x)); + x2 = wxRound(ceil(src.x)); } - else - { - */ - int max = 3 * (65536); - for (int i = 0; i < 256; i++) + else // else means that x is near one of the borders (0 or width-1) { - int rdiff = (r << 8) - colors[i].red; - int gdiff = (g << 8) - colors[i].green; - int bdiff = (b << 8) - colors[i].blue; - int sum = abs (rdiff) + abs (gdiff) + abs (bdiff); - if (sum < max) { pixel = i; max = sum; } + x1 = x2 = wxRound (src.x); } - /* + + if (0 < src.y && src.y < h - 1) + { + y1 = wxRound(floor(src.y)); + y2 = wxRound(ceil(src.y)); } - */ - XPutPixel( data_image, x, y, pixel ); - break; - } - case 15: - { - int pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); - XPutPixel( data_image, x, y, pixel ); - break; - } - case 16: - { - int pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); - XPutPixel( data_image, x, y, pixel ); - break; - } - case 32: - case 24: - { - int pixel = 0; - switch (b_o) + else { - case RGB: pixel = (r << 16) | (g << 8) | b; break; - case RBG: pixel = (r << 16) | (b << 8) | g; break; - case BRG: pixel = (b << 16) | (r << 8) | g; break; - case BGR: pixel = (b << 16) | (g << 8) | r; break; - case GRB: pixel = (g << 16) | (r << 8) | b; break; - case GBR: pixel = (g << 16) | (b << 8) | r; break; + y1 = y2 = wxRound (src.y); } - XPutPixel( data_image, x, y, pixel ); - } - default: break; - } - } // for - } // for - - // Blit picture - XGCValues gcvalues; - gcvalues.foreground = BlackPixel( dpy, DefaultScreen( dpy ) ); - GC gc = XCreateGC( dpy, RootWindow ( dpy, DefaultScreen(dpy) ), GCForeground, &gcvalues ); - XPutImage( dpy, (Drawable)bitmap.GetPixmap(), gc, data_image, 0, 0, 0, 0, width, height ); + // get four points and the distances (square of the distance, + // for efficiency reasons) for the interpolation formula - XDestroyImage( data_image ); - XFreeGC( dpy, gc ); + // GRG: Do not calculate the points until they are + // really needed -- this way we can calculate + // just one, instead of four, if d1, d2, d3 + // or d4 are < wxROTATE_EPSILON - /* - // Blit mask + const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1); + const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1); + const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2); + const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2); - if (HasMask()) - { - GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() ); + // Now interpolate as a weighted average of the four surrounding + // points, where the weights are the distances to each of those points - gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height ); + // If the point is exactly at one point of the grid of the source + // image, then don't interpolate -- just assign the pixel - gdk_image_destroy( mask_image ); - gdk_gc_unref( mask_gc ); - } - */ - - return bitmap; -} - -wxImage::wxImage( const wxBitmap &bitmap ) -{ - wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") ); + // d1,d2,d3,d4 are positive -- no need for abs() + if (d1 < wxROTATE_EPSILON) + { + unsigned char *p = data[y1] + (3 * x1); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - Display *dpy = (Display*) wxGetDisplay(); - Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) ); - int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) ); + if (has_alpha) + *(alpha_dst++) = *(alpha[y1] + x1); + } + else if (d2 < wxROTATE_EPSILON) + { + unsigned char *p = data[y1] + (3 * x2); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - XImage *ximage = XGetImage( dpy, - (Drawable)bitmap.GetPixmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight(), - AllPlanes, ZPixmap ); + if (has_alpha) + *(alpha_dst++) = *(alpha[y1] + x2); + } + else if (d3 < wxROTATE_EPSILON) + { + unsigned char *p = data[y2] + (3 * x2); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - wxCHECK_RET( ximage, wxT("couldn't create image") ); + if (has_alpha) + *(alpha_dst++) = *(alpha[y2] + x2); + } + else if (d4 < wxROTATE_EPSILON) + { + unsigned char *p = data[y2] + (3 * x1); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - Create( bitmap.GetWidth(), bitmap.GetHeight() ); - char unsigned *data = GetData(); + if (has_alpha) + *(alpha_dst++) = *(alpha[y2] + x1); + } + else + { + // weights for the weighted average are proportional to the inverse of the distance + unsigned char *v1 = data[y1] + (3 * x1); + unsigned char *v2 = data[y1] + (3 * x2); + unsigned char *v3 = data[y2] + (3 * x2); + unsigned char *v4 = data[y2] + (3 * x1); + + const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4; + + // GRG: Unrolled. + + *(dst++) = (unsigned char) + ( (w1 * *(v1++) + w2 * *(v2++) + + w3 * *(v3++) + w4 * *(v4++)) / + (w1 + w2 + w3 + w4) ); + *(dst++) = (unsigned char) + ( (w1 * *(v1++) + w2 * *(v2++) + + w3 * *(v3++) + w4 * *(v4++)) / + (w1 + w2 + w3 + w4) ); + *(dst++) = (unsigned char) + ( (w1 * *v1 + w2 * *v2 + + w3 * *v3 + w4 * *v4) / + (w1 + w2 + w3 + w4) ); + + if (has_alpha) + { + v1 = alpha[y1] + (x1); + v2 = alpha[y1] + (x2); + v3 = alpha[y2] + (x2); + v4 = alpha[y2] + (x1); + + *(alpha_dst++) = (unsigned char) + ( (w1 * *v1 + w2 * *v2 + + w3 * *v3 + w4 * *v4) / + (w1 + w2 + w3 + w4) ); + } + } + } + else + { + *(dst++) = blank_r; + *(dst++) = blank_g; + *(dst++) = blank_b; - if (!data) - { - XDestroyImage( ximage ); - wxFAIL_MSG( wxT("couldn't create image") ); - return; + if (has_alpha) + *(alpha_dst++) = 0; + } + } + } } - - /* - GdkImage *gdk_image_mask = (GdkImage*) NULL; - if (bitmap.GetMask()) + else // not interpolating { - gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight() ); - - SetMaskColour( 16, 16, 16 ); // anything unlikely and dividable - } - */ - - // Retrieve depth info - - XVisualInfo vinfo_template; - XVisualInfo *vi; - - vinfo_template.visual = vis; - vinfo_template.visualid = XVisualIDFromVisual( vis ); - vinfo_template.depth = bpp; - int nitem = 0; + for (int y = 0; y < rH; y++) + { + for (int x = 0; x < rW; x++) + { + wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); - vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem ); + const int xs = wxRound (src.x); // wxRound rounds to the + const int ys = wxRound (src.y); // closest integer - wxCHECK_RET( vi, wxT("no visual") ); + if (0 <= xs && xs < w && 0 <= ys && ys < h) + { + unsigned char *p = data[ys] + (3 * xs); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15; + if (has_alpha) + *(alpha_dst++) = *(alpha[ys] + (xs)); + } + else + { + *(dst++) = blank_r; + *(dst++) = blank_g; + *(dst++) = blank_b; - XFree( vi ); + if (has_alpha) + *(alpha_dst++) = 255; + } + } + } + } - XColor colors[256]; - if (bpp == 8) - { - Colormap cmap = (Colormap)wxTheApp->GetMainColormap( dpy ); + delete [] data; + delete [] alpha; - for (int i = 0; i < 256; i++) colors[i].pixel = i; - XQueryColors( dpy, cmap, colors, 256 ); - } + return rotated; +} - long pos = 0; - for (int j = 0; j < bitmap.GetHeight(); j++) - { - for (int i = 0; i < bitmap.GetWidth(); i++) - { - int pixel = XGetPixel( ximage, i, j ); - if (bpp <= 8) - { - data[pos] = colors[pixel].red >> 8; - data[pos+1] = colors[pixel].green >> 8; - data[pos+2] = colors[pixel].blue >> 8; - } else if (bpp == 15) - { - data[pos] = (pixel >> 7) & 0xf8; - data[pos+1] = (pixel >> 2) & 0xf8; - data[pos+2] = (pixel << 3) & 0xf8; - } else if (bpp == 16) - { - data[pos] = (pixel >> 8) & 0xf8; - data[pos+1] = (pixel >> 3) & 0xfc; - data[pos+2] = (pixel << 3) & 0xf8; - } else - { - data[pos] = (pixel >> 16) & 0xff; - data[pos+1] = (pixel >> 8) & 0xff; - data[pos+2] = pixel & 0xff; - } - /* - if (gdk_image_mask) - { - int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j ); - if (mask_pixel == 0) - { - data[pos] = 16; - data[pos+1] = 16; - data[pos+2] = 16; - } - } - */ - pos += 3; - } - } - XDestroyImage( ximage ); - /* - if (gdk_image_mask) gdk_image_destroy( gdk_image_mask ); - */ -} -#endif // A module to allow wxImage initialization/cleanup // without calling these functions from app.cpp or from @@ -1659,8 +3350,11 @@ class wxImageModule: public wxModule DECLARE_DYNAMIC_CLASS(wxImageModule) public: wxImageModule() {} - bool OnInit() { wxImage::InitStandardHandlers(); return TRUE; }; - void OnExit() { wxImage::CleanUpHandlers(); }; + bool OnInit() { wxImage::InitStandardHandlers(); return true; } + void OnExit() { wxImage::CleanUpHandlers(); } }; IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule) + + +#endif // wxUSE_IMAGE