X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8f2b21e474d7f7c07fd97306d2f6d5b1f05d2844..08670ea85abf4b4946a9ce64971b591d7b1ee30b:/src/common/image.cpp?ds=sidebyside diff --git a/src/common/image.cpp b/src/common/image.cpp index b55fd18070..62597542fd 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 ///////////////////////////////////////////////////////////////////////////// -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma implementation "image.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -18,33 +14,53 @@ #pragma hdrstop #endif -#include "wx/defs.h" - #if wxUSE_IMAGE #include "wx/image.h" -#include "wx/bitmap.h" -#include "wx/debug.h" -#include "wx/log.h" -#include "wx/app.h" -#include "wx/filefn.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/wfstream.h" -#include "wx/intl.h" -#include "wx/module.h" -#include "wx/hash.h" -#include "wx/utils.h" +#include "wx/xpmdecod.h" // For memcpy #include -#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 +//----------------------------------------------------------------------------- +// global data +//----------------------------------------------------------------------------- + +wxList wxImage::sm_handlers; +wxImage wxNullImage; //----------------------------------------------------------------------------- -// wxImage +// wxImageRefData //----------------------------------------------------------------------------- class wxImageRefData: public wxObjectRefData @@ -55,6 +71,7 @@ public: int m_width; int m_height; + wxBitmapType m_type; unsigned char *m_data; bool m_hasMask; @@ -64,8 +81,13 @@ public: 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 @@ -73,13 +95,14 @@ public: wxArrayString m_optionNames; wxArrayString m_optionValues; - DECLARE_NO_COPY_CLASS(wxImageRefData) + wxDECLARE_NO_COPY_CLASS(wxImageRefData); }; wxImageRefData::wxImageRefData() { m_width = 0; m_height = 0; + m_type = wxBITMAP_TYPE_INVALID; m_data = m_alpha = (unsigned char *) NULL; @@ -89,72 +112,39 @@ wxImageRefData::wxImageRefData() m_hasMask = false; m_ok = false; - m_static = false; + m_static = + m_staticAlpha = false; } wxImageRefData::~wxImageRefData() { if ( !m_static ) free( m_data ); - - free(m_alpha); + if ( !m_staticAlpha ) + free( m_alpha ); } -wxList wxImage::sm_handlers; - -wxImage wxNullImage; +//----------------------------------------------------------------------------- +// wxImage //----------------------------------------------------------------------------- -#define M_IMGDATA ((wxImageRefData *)m_refData) +#define M_IMGDATA static_cast(m_refData) IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) -wxImage::wxImage() -{ -} - -wxImage::wxImage( int width, int height, bool clear ) -{ - Create( width, height, clear ); -} - -wxImage::wxImage( int width, int height, unsigned char* data, bool static_data ) -{ - Create( width, height, data, static_data ); -} - -wxImage::wxImage( const wxString& name, long type, int index ) -{ - LoadFile( name, type, index ); -} - -wxImage::wxImage( const wxString& name, const wxString& mimetype, int index ) -{ - LoadFile( name, mimetype, index ); -} - -#if wxUSE_STREAMS -wxImage::wxImage( wxInputStream& stream, long type, int index ) -{ - LoadFile( stream, type, index ); -} - -wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index ) -{ - LoadFile( stream, mimetype, index ); -} -#endif // wxUSE_STREAMS - -wxImage::wxImage( const wxImage& image ) - : wxObject() +bool wxImage::Create(const char* const* xpmData) { - Ref(image); -} +#if wxUSE_XPM + UnRef(); -wxImage::wxImage( const wxImage* image ) -{ - if (image) Ref(*image); + wxXPMDecoder decoder; + (*this) = decoder.ReadData(xpmData); + return IsOk(); +#else + wxUnusedVar(xpmData); + return false; +#endif } bool wxImage::Create( int width, int height, bool clear ) @@ -170,29 +160,50 @@ bool wxImage::Create( int width, int height, bool clear ) return false; } + M_IMGDATA->m_width = width; + M_IMGDATA->m_height = height; + M_IMGDATA->m_ok = true; + if (clear) - memset(M_IMGDATA->m_data, 0, width*height*3); + { + Clear(); + } + + return true; +} + +bool wxImage::Create( int width, int height, unsigned char* data, bool static_data ) +{ + 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; } -bool wxImage::Create( int width, int height, unsigned char* data, bool static_data ) +bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) { UnRef(); - wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") ); + 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; } @@ -202,27 +213,90 @@ void wxImage::Destroy() UnRef(); } -wxImage wxImage::Copy() const +void wxImage::Clear(unsigned char value) +{ + memset(M_IMGDATA->m_data, value, M_IMGDATA->m_width*M_IMGDATA->m_height*3); +} + +wxObjectRefData* wxImage::CreateRefData() const +{ + return new wxImageRefData; +} + +wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const +{ + 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) + { + 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; +} + +// returns a new image with the same dimensions, alpha, and mask as *this +// if on_its_side is true, width and height are swapped +wxImage wxImage::MakeEmptyClone(int flags) const { wxImage image; - wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), image, wxS("invalid image") ); - image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; - unsigned char *data = image.GetData(); + if ( flags & Clone_SwapOrientation ) + wxSwap( width, height ); - wxCHECK_MSG( data, image, wxT("unable to create image") ); + if ( !image.Create( width, height, false ) ) + { + wxFAIL_MSG( wxS("unable to create image") ); + return image; + } - image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); - image.SetMask( M_IMGDATA->m_hasMask ); + if ( M_IMGDATA->m_alpha ) + { + image.SetAlpha(); + wxCHECK2_MSG( image.GetAlpha(), return wxImage(), + wxS("unable to create alpha channel") ); + } + + if ( M_IMGDATA->m_hasMask ) + { + image.SetMaskColour( M_IMGDATA->m_maskRed, + M_IMGDATA->m_maskGreen, + M_IMGDATA->m_maskBlue ); + } + + return image; +} + +wxImage wxImage::Copy() const +{ + wxImage image; - memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 ); + wxCHECK_MSG( IsOk(), image, wxT("invalid image") ); - // also copy the image options - wxImageRefData *imgData = (wxImageRefData *)image.m_refData; - imgData->m_optionNames = M_IMGDATA->m_optionNames; - imgData->m_optionValues = M_IMGDATA->m_optionValues; + image.m_refData = CloneRefData(m_refData); return image; } @@ -230,11 +304,11 @@ wxImage wxImage::Copy() const wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const { if( xFactor == 1 && yFactor == 1 ) - return Copy() ; - + return *this; + wxImage image; - wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), image, wxT("invalid image") ); // can't scale to/from 0 size wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image, @@ -242,7 +316,7 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const 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") ); @@ -258,21 +332,33 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const bool hasMask = false ; unsigned char maskRed = 0; unsigned char maskGreen = 0; - unsigned char maskBlue =0 ; + unsigned char maskBlue = 0 ; + + const unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data = data; + const unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; if (M_IMGDATA->m_hasMask) { 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 ); } - char unsigned *source_data = M_IMGDATA->m_data; - char unsigned *target_data = data; - + else + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + target_alpha = image.GetAlpha() ; + } + } + for (long y = 0; y < height; y++) { for (long x = 0; x < width; x++) @@ -280,6 +366,7 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const 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 ) @@ -287,15 +374,22 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const 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 ) ; + const 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 ) { - avgRed += red ; - avgGreen += green ; - avgBlue += blue ; + if ( alpha > 0 ) + { + avgRed += red ; + avgGreen += green ; + avgBlue += blue ; + } + avgAlpha += alpha ; counter++ ; } } @@ -308,6 +402,8 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const } 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); @@ -315,7 +411,7 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const } } - // In case this is a cursor, make sure the hotspot is scalled accordingly: + // 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); @@ -326,11 +422,12 @@ wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const return image; } -wxImage wxImage::Scale( int width, int height ) const +wxImage +wxImage::Scale( int width, int height, wxImageResizeQuality quality ) const { wxImage image; - wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), image, wxT("invalid image") ); // can't scale to/from 0 size wxCHECK_MSG( (width > 0) && (height > 0), image, @@ -341,118 +438,798 @@ wxImage wxImage::Scale( int width, int height ) const wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, wxT("invalid old image size") ); - if ( old_width % width == 0 && old_width >= width && - old_height % height == 0 && old_height >= height ) - { - return ShrinkBy( old_width / width , old_height / height ) ; + // 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; + + if (quality == wxIMAGE_QUALITY_HIGH) + { + quality = (width < old_width && height < old_height) + ? wxIMAGE_QUALITY_BOX_AVERAGE + : wxIMAGE_QUALITY_BICUBIC; + } + + // Resample the image using the method as specified. + switch ( quality ) + { + 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 ); + } + + image = ResampleNearest(width, height); + break; + + case wxIMAGE_QUALITY_BILINEAR: + image = ResampleBilinear(width, height); + break; + + case wxIMAGE_QUALITY_BICUBIC: + image = ResampleBicubic(width, height); + break; + + case wxIMAGE_QUALITY_BOX_AVERAGE: + image = ResampleBox(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 ); + } + + // 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; +} + +wxImage wxImage::ResampleNearest(int width, int height) const +{ + wxImage image; + image.Create( width, height, false ); + + unsigned char *data = image.GetData(); + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + const unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data = data; + const unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; + + if ( !M_IMGDATA->m_hasMask ) + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + target_alpha = image.GetAlpha() ; + } + } + + 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; + + unsigned char* dest_pixel = target_data; + + long y = 0; + for ( long j = 0; j < height; j++ ) + { + const unsigned char* src_line = &source_data[(y>>16)*old_width*3]; + const unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ; + + long x = 0; + for ( long i = 0; i < width; i++ ) + { + const unsigned char* src_pixel = &src_line[(x>>16)*3]; + const 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; + } + + y += y_delta; + } + + return image; +} + +wxImage wxImage::ResampleBox(int width, int height) const +{ + // 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. + + wxImage ret_image(width, height, false); + + const double scale_factor_x = double(M_IMGDATA->m_width) / width; + const double scale_factor_y = double(M_IMGDATA->m_height) / height; + + const int scale_factor_x_2 = (int)(scale_factor_x / 2); + const int scale_factor_y_2 = (int)(scale_factor_y / 2); + + const unsigned char* src_data = M_IMGDATA->m_data; + const 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(); + } + + int averaged_pixels, src_pixel_index; + double sum_r, sum_g, sum_b, sum_a; + + for ( int y = 0; y < height; y++ ) // Destination image - Y direction + { + // Source pixel in the Y direction + int src_y = (int)(y * scale_factor_y); + + 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); + + // Box of pixels to average + averaged_pixels = 0; + sum_r = sum_g = sum_b = sum_a = 0.0; + + for ( int j = int(src_y - scale_factor_y/2.0 + 1), k = j; + j <= int(src_y + scale_factor_y_2) || j < k + 2; + j++ ) + { + // We don't care to average pixels that don't exist (edges) + if ( j < 0 || j > M_IMGDATA->m_height - 1 ) + continue; + + for ( int i = int(src_x - scale_factor_x/2.0 + 1), e = i; + i <= src_x + scale_factor_x_2 || i < e + 2; + i++ ) + { + // Don't average edge pixels + if ( i < 0 || i > M_IMGDATA->m_width - 1 ) + continue; + + // Calculate the actual index in our source pixels + src_pixel_index = j * M_IMGDATA->m_width + i; + + 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]; + + averaged_pixels++; + } + } + + // 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); + } + } + + return ret_image; +} + +wxImage wxImage::ResampleBilinear(int width, int height) const +{ + // This function implements a Bilinear algorithm for resampling. + wxImage ret_image(width, height, false); + const unsigned char* src_data = M_IMGDATA->m_data; + const 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; + + int srcpixymax = M_IMGDATA->m_height - 1; + int srcpixxmax = M_IMGDATA->m_width - 1; + + double srcpixy, srcpixy1, srcpixy2, dy, dy1; + double srcpixx, srcpixx1, srcpixx2, dx, dx1; + + // initialize alpha values to avoid g++ warnings about possibly + // uninitialized variables + double r1, g1, b1, a1 = 0; + double r2, g2, b2, a2 = 0; + + 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; + + + 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 ret_image; +} + +// The following two local functions are for the B-spline weighting of the +// bicubic sampling algorithm +static inline double spline_cube(double value) +{ + return value <= 0.0 ? 0.0 : value * value * value; +} + +static inline double spline_weight(double value) +{ + return (spline_cube(value + 2) - + 4 * spline_cube(value + 1) + + 6 * spline_cube(value) - + 4 * spline_cube(value - 1)) / 6; +} + +// This is the bicubic resampling algorithm +wxImage wxImage::ResampleBicubic(int width, int height) const +{ + // 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); + + const unsigned char* src_data = M_IMGDATA->m_data; + const 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(); + } + + 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; + + 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; + + // Sums for each color channel + double sum_r = 0, sum_g = 0, sum_b = 0, sum_a = 0; + + // 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; + } + } + + // 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; + + if ( src_alpha ) + *dst_alpha++ = (unsigned char)sum_a; + } + } + + return ret_image; +} + +// Blur in the horizontal direction +wxImage wxImage::BlurHorizontal(int blurRadius) const +{ + wxImage ret_image(MakeEmptyClone()); + + wxCHECK( ret_image.IsOk(), ret_image ); + + const unsigned char* src_data = M_IMGDATA->m_data; + unsigned char* dst_data = ret_image.GetData(); + const unsigned char* src_alpha = M_IMGDATA->m_alpha; + unsigned char* dst_alpha = ret_image.GetAlpha(); + + // 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]; + } + + 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); + + // 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); + } + } + + return ret_image; +} + +// Blur in the vertical direction +wxImage wxImage::BlurVertical(int blurRadius) const +{ + wxImage ret_image(MakeEmptyClone()); + + wxCHECK( ret_image.IsOk(), ret_image ); + + const unsigned char* src_data = M_IMGDATA->m_data; + unsigned char* dst_data = ret_image.GetData(); + const unsigned char* src_alpha = M_IMGDATA->m_alpha; + unsigned char* dst_alpha = ret_image.GetAlpha(); + + // 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; +} + +// The new blur function +wxImage wxImage::Blur(int blurRadius) const +{ + 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(MakeEmptyClone(Clone_SwapOrientation)); + + wxCHECK( image.IsOk(), image ); + + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; + + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) + { + int hot_x = GetOptionInt( wxIMAGE_OPTION_CUR_HOTSPOT_X ); + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, + clockwise ? hot_x : width - 1 - hot_x); + } + + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) + { + int hot_y = GetOptionInt( wxIMAGE_OPTION_CUR_HOTSPOT_Y ); + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, + clockwise ? height - 1 - hot_y : hot_y); + } + + unsigned char *data = image.GetData(); + unsigned char *target_data; + + // we rotate the image in 21-pixel (63-byte) wide strips + // to make better use of cpu cache - memory transfers + // (note: while much better than single-pixel "strips", + // our vertical strips will still generally straddle 64-byte cachelines) + for (long ii = 0; ii < width; ) + { + long next_ii = wxMin(ii + 21, width); + + for (long j = 0; j < height; j++) + { + const unsigned char *source_data + = M_IMGDATA->m_data + (j*width + ii)*3; + + for (long i = ii; i < next_ii; i++) + { + if ( clockwise ) + { + target_data = data + ((i + 1)*height - j - 1)*3; + } + else + { + target_data = data + (height*(width - 1 - i) + j)*3; + } + memcpy( target_data, source_data, 3 ); + source_data += 3; + } + } + + ii = next_ii; } - image.Create( width, height, false ); - unsigned char *data = image.GetData(); - - wxCHECK_MSG( data, image, wxT("unable to create image") ); + const unsigned char *source_alpha = M_IMGDATA->m_alpha; - if (M_IMGDATA->m_hasMask) + if ( source_alpha ) { - image.SetMaskColour( M_IMGDATA->m_maskRed, - M_IMGDATA->m_maskGreen, - M_IMGDATA->m_maskBlue ); - } + unsigned char *alpha_data = image.GetAlpha(); + unsigned char *target_alpha = 0 ; - unsigned char *source_data = M_IMGDATA->m_data; - unsigned char *target_data = data; + for (long ii = 0; ii < width; ) + { + long next_ii = wxMin(ii + 64, width); - long x_delta = (old_width<<16) / width; - long y_delta = (old_height<<16) / height; + for (long j = 0; j < height; j++) + { + source_alpha = M_IMGDATA->m_alpha + j*width + ii; - unsigned char* dest_pixel = target_data; + for (long i = ii; i < next_ii; i++) + { + if ( clockwise ) + { + target_alpha = alpha_data + (i+1)*height - j - 1; + } + else + { + target_alpha = alpha_data + height*(width - i - 1) + j; + } - long y = 0; - for ( long j = 0; j < height; j++ ) - { - unsigned char* src_line = &source_data[(y>>16)*old_width*3]; + *target_alpha = *source_alpha++; + } + } - long x = 0; - for ( long i = 0; i < width; i++ ) - { - unsigned char* src_pixel = &src_line[(x>>16)*3]; - dest_pixel[0] = src_pixel[0]; - dest_pixel[1] = src_pixel[1]; - dest_pixel[2] = src_pixel[2]; - dest_pixel += 3; - x += x_delta; + ii = next_ii; } - - y += y_delta; } - // In case this is a cursor, make sure the hotspot is scalled 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; } -wxImage wxImage::Rotate90( bool clockwise ) const +wxImage wxImage::Rotate180() const { - wxImage image; - - wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxImage image(MakeEmptyClone()); - 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") ); - - if (M_IMGDATA->m_hasMask) - image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + wxCHECK( image.IsOk(), image ); 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 ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) + { + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, + width - 1 - GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)); + } + + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) + { + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, + height - 1 - GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)); + } + + unsigned char *data = image.GetData(); + unsigned char *alpha = image.GetAlpha(); + const unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data = data + width * height * 3; 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; - else - target_data = data + ((height*(width-1)) + j - (i*height))*3; + target_data -= 3; memcpy( target_data, source_data, 3 ); source_data += 3; } } + if ( alpha ) + { + const unsigned char *src_alpha = M_IMGDATA->m_alpha; + unsigned char *dest_alpha = alpha + width * height; + + for (long j = 0; j < height; ++j) + { + for (long i = 0; i < width; ++i) + { + *(--dest_alpha) = *(src_alpha++); + } + } + } + return image; } 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 ); + wxImage image(MakeEmptyClone()); - unsigned char *data = image.GetData(); - - wxCHECK_MSG( data, image, wxT("unable to create image") ); - - if (M_IMGDATA->m_hasMask) - image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + wxCHECK( image.IsOk(), image ); long height = M_IMGDATA->m_height; long width = M_IMGDATA->m_width; - unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *data = image.GetData(); + unsigned char *alpha = image.GetAlpha(); + const unsigned char *source_data = M_IMGDATA->m_data; unsigned char *target_data; if (horizontally) @@ -468,6 +1245,25 @@ wxImage wxImage::Mirror( bool horizontally ) const 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 { @@ -477,6 +1273,23 @@ wxImage wxImage::Mirror( bool horizontally ) const memcpy( target_data, source_data, (size_t)3*width ); source_data += 3*width; } + + if ( alpha ) + { + // 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; @@ -486,34 +1299,100 @@ wxImage wxImage::GetSubImage( const wxRect &rect ) const { wxImage image; - wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), image, wxT("invalid image") ); - wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), + wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && + (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), image, wxT("invalid subimage size") ); - int subwidth=rect.GetWidth(); - const int subheight=rect.GetHeight(); + const int subwidth = rect.GetWidth(); + const int subheight = rect.GetHeight(); image.Create( subwidth, subheight, false ); - unsigned char *subdata = image.GetData(), *data=GetData(); + 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 ) { + 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 subleft=3*rect.GetLeft(); - const int width=3*GetWidth(); - subwidth*=3; + const int width = GetWidth(); + const int pixsoff = rect.GetLeft() + width * rect.GetTop(); - data+=rect.GetTop()*width+subleft; + 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, data, subwidth); - subdata+=subwidth; - data+=width; + 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( IsOk(), 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; @@ -521,8 +1400,10 @@ wxImage wxImage::GetSubImage( const wxRect &rect ) const void wxImage::Paste( const wxImage &image, int x, int y ) { - wxCHECK_RET( Ok(), wxT("invalid image") ); - wxCHECK_RET( image.Ok(), wxT("invalid image") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); + wxCHECK_RET( image.IsOk(), wxT("invalid image") ); + + AllocExclusive(); int xx = 0; int yy = 0; @@ -548,25 +1429,47 @@ void wxImage::Paste( const wxImage &image, int x, int y ) if (width < 1) return; if (height < 1) return; - if ((!HasMask() && !image.HasMask()) || - ((HasMask() && image.HasMask() && + // If we can, copy the data using memcpy() as this is the fastest way. But + // for this the image being pasted must have "compatible" mask with this + // one meaning that either it must not have one at all or it must use the + // same masked colour. + if ( !image.HasMask() || + ((HasMask() && (GetMaskRed()==image.GetMaskRed()) && (GetMaskGreen()==image.GetMaskGreen()) && - (GetMaskBlue()==image.GetMaskBlue())))) + (GetMaskBlue()==image.GetMaskBlue()))) ) { - width *= 3; - unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); + const unsigned char* source_data = image.GetData() + 3*(xx + yy*image.GetWidth()); int source_step = image.GetWidth()*3; - unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; + unsigned char* target_data = GetData() + 3*((x+xx) + (y+yy)*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 ); + memcpy( target_data, source_data, width*3 ); source_data += source_step; target_data += target_step; } - return; + } + + // Copy over the alpha channel from the original image + if ( image.HasAlpha() ) + { + if ( !HasAlpha() ) + InitAlpha(); + + const 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()) @@ -575,19 +1478,18 @@ void wxImage::Paste( const wxImage &image, int x, int y ) unsigned char g = image.GetMaskGreen(); unsigned char b = image.GetMaskBlue(); - width *= 3; - unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); + const unsigned char* source_data = image.GetData() + 3*(xx + yy*image.GetWidth()); int source_step = image.GetWidth()*3; - unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; + unsigned char* target_data = GetData() + 3*((x+xx) + (y+yy)*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; i+=3) + for (int i = 0; i < width*3; i+=3) { - if ((source_data[i] != r) && - (source_data[i+1] != g) && + if ((source_data[i] != r) || + (source_data[i+1] != g) || (source_data[i+2] != b)) { memcpy( target_data+i, source_data+i, 3 ); @@ -602,7 +1504,9 @@ void wxImage::Paste( const wxImage &image, int x, int y ) 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") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); + + AllocExclusive(); unsigned char *data = GetData(); @@ -622,11 +1526,50 @@ void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1, } } +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(MakeEmptyClone()); + + wxCHECK( image.IsOk(), image ); + + const unsigned char *src = M_IMGDATA->m_data; + unsigned char *dest = image.GetData(); + + const bool hasMask = M_IMGDATA->m_hasMask; + const unsigned char maskRed = M_IMGDATA->m_maskRed; + const unsigned char maskGreen = M_IMGDATA->m_maskGreen; + const unsigned char maskBlue = M_IMGDATA->m_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); + // only modify non-masked pixels + if ( !hasMask || src[0] != maskRed || src[1] != maskGreen || src[2] != maskBlue ) + { + wxColour::MakeGrey(dest + 0, dest + 1, dest + 2, weight_r, weight_g, weight_b); + } + } + + // copy the alpha channel, if any + if ( image.HasAlpha() ) + { + memcpy( image.GetAlpha(), GetAlpha(), GetWidth() * GetHeight() ); + } + + return image; +} + wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const { wxImage image; - wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), image, wxT("invalid image") ); image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); @@ -650,74 +1593,169 @@ wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char for ( long i = 0; i < size; i++, srcd += 3, tard += 3 ) { - if (srcd[0] == r && srcd[1] == g && srcd[2] == b) - tard[0] = tard[1] = tard[2] = 255; - else - tard[0] = tard[1] = tard[2] = 0; + bool on = (srcd[0] == r) && (srcd[1] == g) && (srcd[2] == b); + wxColourBase::MakeMono(tard + 0, tard + 1, tard + 2, on); } return image; } -void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) +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( IsOk(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_width; +} + +int wxImage::GetHeight() const { - wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_MSG( IsOk(), 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 ( IsOk() && + x >= 0 && y >= 0 && + x < M_IMGDATA->m_width && y < M_IMGDATA->m_height ) + { + return y*M_IMGDATA->m_width + x; + } - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + 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") ); - wxCHECK_RET( (x>=0) && (y>=0) && (xm_data[ pos ] = r; M_IMGDATA->m_data[ pos+1 ] = g; M_IMGDATA->m_data[ pos+2 ] = b; } -unsigned char wxImage::GetRed( int x, int y ) const +void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b ) { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + AllocExclusive(); - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_data[pos]; + 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::GetGreen( int x, int y ) const +unsigned char wxImage::GetRed( int x, int y ) const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + pos *= 3; - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + return M_IMGDATA->m_data[pos]; +} - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_data[pos+1]; } unsigned char wxImage::GetBlue( int x, int y ) const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); - - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; - - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_data[pos+2]; } -bool wxImage::Ok() const +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 @@ -727,14 +1765,14 @@ bool wxImage::Ok() const unsigned char *wxImage::GetData() const { - wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), (unsigned char *)NULL, wxT("invalid image") ); return M_IMGDATA->m_data; } -void wxImage::SetData( unsigned char *data ) +void wxImage::SetData( unsigned char *data, bool static_data ) { - wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); wxImageRefData *newRefData = new wxImageRefData(); @@ -746,13 +1784,14 @@ void wxImage::SetData( unsigned char *data ) 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 ) +void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data ) { wxImageRefData *newRefData = new wxImageRefData(); @@ -774,6 +1813,7 @@ void wxImage::SetData( unsigned char *data, int new_width, int new_height ) newRefData->m_data = data; newRefData->m_ok = true; } + newRefData->m_static = static_data; UnRef(); @@ -786,55 +1826,132 @@ void wxImage::SetData( unsigned char *data, int new_width, int new_height ) void wxImage::SetAlpha(int x, int y, unsigned char alpha) { - wxCHECK_RET( Ok() && HasAlpha(), wxT("invalid image or no alpha channel") ); + wxCHECK_RET( HasAlpha(), wxT("no alpha channel") ); - int w = M_IMGDATA->m_width, - h = M_IMGDATA->m_height; + long pos = XYToIndex(x, y); + wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); - wxCHECK_RET( x >=0 && y >= 0 && x < w && y < h, wxT("invalid image index") ); + AllocExclusive(); - M_IMGDATA->m_alpha[y*w + x] = alpha; + M_IMGDATA->m_alpha[pos] = alpha; } unsigned char wxImage::GetAlpha(int x, int y) const { - wxCHECK_MSG( Ok() && HasAlpha(), 0, wxT("invalid image or no alpha channel") ); + wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") ); - int w = M_IMGDATA->m_width, - h = M_IMGDATA->m_height; + 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(); - wxCHECK_MSG( x >=0 && y >= 0 && x < w && y < h, 0, wxT("invalid image index") ); + for ( int y = 0; y < h; y++ ) + { + for ( int x = 0; x < w; x++ ) + { + *alpha++ = *data; + *data++ = r; + *data++ = g; + *data++ = b; + } + } - return M_IMGDATA->m_alpha[y*w + x]; + return true; } -void wxImage::SetAlpha( unsigned char *alpha ) +void wxImage::SetAlpha( unsigned char *alpha, bool static_data ) { - wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); + + AllocExclusive(); if ( !alpha ) { alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height); } - free(M_IMGDATA->m_alpha); + 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") ); + wxCHECK_MSG( IsOk(), (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") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); + + AllocExclusive(); M_IMGDATA->m_maskRed = r; M_IMGDATA->m_maskGreen = g; @@ -842,53 +1959,90 @@ void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) M_IMGDATA->m_hasMask = true; } +bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const +{ + wxCHECK_MSG( IsOk(), 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") ); + wxCHECK_MSG( IsOk(), 0, wxT("invalid image") ); return M_IMGDATA->m_maskRed; } unsigned char wxImage::GetMaskGreen() const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), 0, wxT("invalid image") ); return M_IMGDATA->m_maskGreen; } unsigned char wxImage::GetMaskBlue() const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), 0, wxT("invalid image") ); return M_IMGDATA->m_maskBlue; } void wxImage::SetMask( bool mask ) { - wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); + + AllocExclusive(); M_IMGDATA->m_hasMask = mask; } bool wxImage::HasMask() const { - wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), false, wxT("invalid image") ); return M_IMGDATA->m_hasMask; } -int wxImage::GetWidth() const +bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") ); - return M_IMGDATA->m_width; -} + // 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; + } + } -int wxImage::GetHeight() const -{ - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + // then check alpha + if ( M_IMGDATA->m_alpha ) + { + if ( M_IMGDATA->m_alpha[pos] < threshold ) + { + // transparent enough + return true; + } + } - return M_IMGDATA->m_height; + // not transparent + return false; } bool wxImage::SetMaskFromImage(const wxImage& mask, @@ -909,6 +2063,8 @@ bool wxImage::SetMaskFromImage(const wxImage& mask, return false ; } + AllocExclusive(); + unsigned char *imgdata = GetData(); unsigned char *maskdata = mask.GetData(); @@ -935,19 +2091,32 @@ bool wxImage::SetMaskFromImage(const wxImage& mask, return true; } - + bool wxImage::ConvertAlphaToMask(unsigned char threshold) { - if (!HasAlpha()) - return true; + if ( !HasAlpha() ) + return false; unsigned char mr, mg, mb; - if (!FindFirstUnusedColour(&mr, &mg, &mb)) + if ( !FindFirstUnusedColour(&mr, &mg, &mb) ) { wxLogError( _("No unused colour in image being masked.") ); return false; } + return ConvertAlphaToMask(mr, mg, mb, threshold); +} + +bool wxImage::ConvertAlphaToMask(unsigned char mr, + unsigned char mg, + unsigned char mb, + unsigned char threshold) +{ + if ( !HasAlpha() ) + return false; + + AllocExclusive(); + SetMask(true); SetMaskColour(mr, mg, mb); @@ -961,7 +2130,7 @@ bool wxImage::ConvertAlphaToMask(unsigned char threshold) { for (int x = 0; x < w; x++, imgdata += 3, alphadata++) { - if ((unsigned)(*alphadata) < threshold) + if (*alphadata < threshold) { imgdata[0] = mr; imgdata[1] = mg; @@ -970,47 +2139,57 @@ bool wxImage::ConvertAlphaToMask(unsigned char threshold) } } - free(M_IMGDATA->m_alpha); + if ( !M_IMGDATA->m_staticAlpha ) + free(M_IMGDATA->m_alpha); + M_IMGDATA->m_alpha = NULL; + M_IMGDATA->m_staticAlpha = false; return true; } -#if wxUSE_PALETTE - +// ---------------------------------------------------------------------------- // Palette functions +// ---------------------------------------------------------------------------- + +#if wxUSE_PALETTE bool wxImage::HasPalette() const { - if (!Ok()) + if (!IsOk()) return false; - return M_IMGDATA->m_palette.Ok(); + return M_IMGDATA->m_palette.IsOk(); } const wxPalette& wxImage::GetPalette() const { - wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), wxNullPalette, wxT("invalid image") ); return M_IMGDATA->m_palette; } void wxImage::SetPalette(const wxPalette& palette) { - wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_RET( IsOk(), wxT("invalid image") ); + + AllocExclusive(); M_IMGDATA->m_palette = palette; } #endif // wxUSE_PALETTE +// ---------------------------------------------------------------------------- // Option functions (arbitrary name/value mapping) +// ---------------------------------------------------------------------------- + void wxImage::SetOption(const wxString& name, const wxString& value) { - wxCHECK_RET( Ok(), wxT("invalid image") ); + AllocExclusive(); int idx = M_IMGDATA->m_optionNames.Index(name, false); - if (idx == wxNOT_FOUND) + if ( idx == wxNOT_FOUND ) { M_IMGDATA->m_optionNames.Add(name); M_IMGDATA->m_optionValues.Add(value); @@ -1031,10 +2210,11 @@ void wxImage::SetOption(const wxString& name, int value) wxString wxImage::GetOption(const wxString& name) const { - wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") ); + if ( !M_IMGDATA ) + return wxEmptyString; int idx = M_IMGDATA->m_optionNames.Index(name, false); - if (idx == wxNOT_FOUND) + if ( idx == wxNOT_FOUND ) return wxEmptyString; else return M_IMGDATA->m_optionValues[idx]; @@ -1042,126 +2222,130 @@ wxString wxImage::GetOption(const wxString& name) const int wxImage::GetOptionInt(const wxString& name) const { - wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); - return wxAtoi(GetOption(name)); } bool wxImage::HasOption(const wxString& name) const { - wxCHECK_MSG( Ok(), false, wxT("invalid image") ); - - return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND); + return M_IMGDATA ? M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND + : false; } -bool wxImage::LoadFile( const wxString& filename, long type, int index ) +// ---------------------------------------------------------------------------- +// image I/O +// ---------------------------------------------------------------------------- + +bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + wxBitmapType WXUNUSED_UNLESS_STREAMS(type), + int WXUNUSED_UNLESS_STREAMS(index) ) { -#if wxUSE_STREAMS - if (wxFileExists(filename)) +#if HAS_FILE_STREAMS + wxImageFileInputStream stream(filename); + if ( stream.IsOk() ) { - wxFileInputStream stream(filename); wxBufferedInputStream bstream( stream ); - return LoadFile(bstream, type, index); + if ( LoadFile(bstream, type, index) ) + return true; } - else - { - wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); - return false; - } -#else // !wxUSE_STREAMS + wxLogError(_("Failed to load image from file \"%s\"."), filename); +#endif // HAS_FILE_STREAMS + return false; -#endif // wxUSE_STREAMS } -bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int index ) +bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + const wxString& WXUNUSED_UNLESS_STREAMS(mimetype), + int WXUNUSED_UNLESS_STREAMS(index) ) { -#if wxUSE_STREAMS - if (wxFileExists(filename)) +#if HAS_FILE_STREAMS + wxImageFileInputStream stream(filename); + if ( stream.IsOk() ) { - wxFileInputStream stream(filename); wxBufferedInputStream bstream( stream ); - return LoadFile(bstream, mimetype, index); + if ( LoadFile(bstream, mimetype, index) ) + return true; } - else - { - wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); - return false; - } -#else // !wxUSE_STREAMS + wxLogError(_("Failed to load image from file \"%s\"."), filename); +#endif // HAS_FILE_STREAMS + return false; -#endif // wxUSE_STREAMS } - bool wxImage::SaveFile( const wxString& filename ) const { wxString ext = filename.AfterLast('.').Lower(); - wxImageHandler * pHandler = FindHandler(ext, -1); - if (pHandler) + wxImageHandler *handler = FindHandler(ext, wxBITMAP_TYPE_ANY); + if ( !handler) { - SaveFile(filename, pHandler->GetType()); - return true; + wxLogError(_("Can't save image to file '%s': unknown extension."), + filename); + return false; } - wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str()); - - return false; + return SaveFile(filename, handler->GetType()); } -bool wxImage::SaveFile( const wxString& filename, int type ) const +bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + wxBitmapType WXUNUSED_UNLESS_STREAMS(type) ) const { -#if wxUSE_STREAMS +#if HAS_FILE_STREAMS + wxCHECK_MSG( IsOk(), false, wxT("invalid image") ); + ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); - wxFileOutputStream stream(filename); + wxImageFileOutputStream stream(filename); if ( stream.IsOk() ) { wxBufferedOutputStream bstream( stream ); return SaveFile(bstream, type); } -#endif // wxUSE_STREAMS +#endif // HAS_FILE_STREAMS return false; } -bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const +bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const { -#if wxUSE_STREAMS +#if HAS_FILE_STREAMS + wxCHECK_MSG( IsOk(), false, wxT("invalid image") ); + ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); - wxFileOutputStream stream(filename); + wxImageFileOutputStream stream(filename); if ( stream.IsOk() ) { wxBufferedOutputStream bstream( stream ); return SaveFile(bstream, mimetype); } -#endif // wxUSE_STREAMS +#endif // HAS_FILE_STREAMS return false; } -bool wxImage::CanRead( const wxString &name ) +bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) ) { -#if wxUSE_STREAMS - wxFileInputStream stream(name); - return CanRead(stream); +#if HAS_FILE_STREAMS + wxImageFileInputStream stream(name); + return CanRead(stream); #else - return false; + return false; #endif } -int wxImage::GetImageCount( const wxString &name, long type ) +int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name), + wxBitmapType WXUNUSED_UNLESS_STREAMS(type) ) { -#if wxUSE_STREAMS - wxFileInputStream stream(name); - if (stream.Ok()) - return GetImageCount(stream, type); +#if HAS_FILE_STREAMS + wxImageFileInputStream stream(name); + if (stream.IsOk()) + return GetImageCount(stream, type); #endif return 0; @@ -1183,19 +2367,25 @@ bool wxImage::CanRead( wxInputStream &stream ) return false; } -int wxImage::GetImageCount( wxInputStream &stream, long type ) +int wxImage::GetImageCount( wxInputStream &stream, wxBitmapType type ) { wxImageHandler *handler; if ( type == wxBITMAP_TYPE_ANY ) { - wxList &list=GetHandlers(); + const wxList& list = GetHandlers(); - for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext()) + for ( wxList::compatibility_iterator node = list.GetFirst(); + node; + node = node->GetNext() ) { - handler=(wxImageHandler*)node->GetData(); + handler = (wxImageHandler*)node->GetData(); if ( handler->CanRead(stream) ) - return handler->GetImageCount(stream); + { + const int count = handler->GetImageCount(stream); + if ( count >= 0 ) + return count; + } } @@ -1222,40 +2412,113 @@ int wxImage::GetImageCount( wxInputStream &stream, long type ) } } -bool wxImage::LoadFile( wxInputStream& stream, long type, int index ) +bool wxImage::DoLoad(wxImageHandler& handler, wxInputStream& stream, int index) { - UnRef(); + // 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); - m_refData = new wxImageRefData; + // Preserve the original stream position if possible to rewind back to it + // if we failed to load the file -- maybe the next handler that we try can + // succeed after us then. + wxFileOffset posOld = wxInvalidOffset; + if ( stream.IsSeekable() ) + posOld = stream.TellI(); + + if ( !handler.LoadFile(this, stream, true/*verbose*/, index) ) + { + if ( posOld != wxInvalidOffset ) + stream.SeekI(posOld); + + 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 ) + { + // get the original size if it was set by the image handler + // but also in order to restore it after Rescale + int widthOrigOption = GetOptionInt(wxIMAGE_OPTION_ORIGINAL_WIDTH), + heightOrigOption = GetOptionInt(wxIMAGE_OPTION_ORIGINAL_HEIGHT); + + Rescale(width, height, wxIMAGE_QUALITY_HIGH); + + SetOption(wxIMAGE_OPTION_ORIGINAL_WIDTH, widthOrigOption ? widthOrigOption : widthOrig); + SetOption(wxIMAGE_OPTION_ORIGINAL_HEIGHT, heightOrigOption ? heightOrigOption : heightOrig); + } + } + + // Set this after Rescale, which currently does not preserve it + M_IMGDATA->m_type = handler.GetType(); + + return true; +} + +bool wxImage::LoadFile( wxInputStream& stream, wxBitmapType type, int index ) +{ + AllocExclusive(); wxImageHandler *handler; if ( type == wxBITMAP_TYPE_ANY ) { - wxList &list=GetHandlers(); - - for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) + if ( !stream.IsSeekable() ) { - handler=(wxImageHandler*)node->GetData(); - if ( handler->CanRead(stream) ) - return handler->LoadFile(this, stream, true/*verbose*/, index); + // The error message about image data format being unknown below + // would be misleading in this case as we are not even going to try + // any handlers because CanRead() never does anything for not + // seekable stream, so try to be more precise here. + wxLogError(_("Can't automatically determine the image format " + "for non-seekable input.")); + return false; + } + 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.") ); + wxLogWarning( _("Unknown image data format.") ); + return false; } + //else: have specific type handler = FindHandler(type); - - if (handler == 0) + if ( !handler ) { wxLogWarning( _("No image handler for type %d defined."), type ); + return false; + } + if ( stream.IsSeekable() && !handler->CanRead(stream) ) + { + wxLogError(_("This is not a %s."), handler->GetName()); return false; } - return handler->LoadFile(this, stream, true/*verbose*/, index); + return DoLoad(*handler, stream, index); } bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index ) @@ -1266,49 +2529,64 @@ bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int ind wxImageHandler *handler = FindHandlerMime(mimetype); - if (handler == 0) + if ( !handler ) { wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); + return false; + } + if ( stream.IsSeekable() && !handler->CanRead(stream) ) + { + wxLogError(_("Image is not of type %s."), mimetype); return false; } - return handler->LoadFile( this, stream, true/*verbose*/, index ); + return DoLoad(*handler, stream, index); } -bool wxImage::SaveFile( wxOutputStream& stream, int type ) const +bool wxImage::DoSave(wxImageHandler& handler, wxOutputStream& stream) const { - wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + wxImage * const self = const_cast(this); + if ( !handler.SaveFile(self, stream) ) + return false; - wxImageHandler *handler = FindHandler(type); + M_IMGDATA->m_type = handler.GetType(); + return true; +} + +bool wxImage::SaveFile( wxOutputStream& stream, wxBitmapType type ) const +{ + wxCHECK_MSG( IsOk(), false, wxT("invalid image") ); - if (handler == 0) + wxImageHandler *handler = FindHandler(type); + if ( !handler ) { wxLogWarning( _("No image handler for type %d defined."), type ); - return false; } - return handler->SaveFile( (wxImage*)this, stream ); + return DoSave(*handler, stream); } bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const { - wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + wxCHECK_MSG( IsOk(), false, wxT("invalid image") ); wxImageHandler *handler = FindHandlerMime(mimetype); - - if (handler == 0) + if ( !handler ) { wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); - - return false; } - return handler->SaveFile( (wxImage*)this, stream ); + return DoSave(*handler, stream); } + #endif // wxUSE_STREAMS +// ---------------------------------------------------------------------------- +// image I/O handlers +// ---------------------------------------------------------------------------- + void wxImage::AddHandler( wxImageHandler *handler ) { // Check for an existing handler of the type being added. @@ -1324,7 +2602,7 @@ void wxImage::AddHandler( wxImageHandler *handler ) // may) we should probably refcount the duplicates. // also an issue in InsertHandler below. - wxLogDebug( _T("Adding duplicate image handler for '%s'"), + wxLogDebug( wxT("Adding duplicate image handler for '%s'"), handler->GetName().c_str() ); delete handler; } @@ -1340,7 +2618,7 @@ void wxImage::InsertHandler( wxImageHandler *handler ) else { // see AddHandler for additional comments. - wxLogDebug( _T("Inserting duplicate image handler for '%s'"), + wxLogDebug( wxT("Inserting duplicate image handler for '%s'"), handler->GetName().c_str() ); delete handler; } @@ -1369,24 +2647,28 @@ wxImageHandler *wxImage::FindHandler( const wxString& name ) node = node->GetNext(); } - return 0; + return NULL; } -wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType ) +wxImageHandler *wxImage::FindHandler( const wxString& extension, wxBitmapType bitmapType ) { wxList::compatibility_iterator node = sm_handlers.GetFirst(); while (node) { wxImageHandler *handler = (wxImageHandler*)node->GetData(); - if ( (handler->GetExtension().Cmp(extension) == 0) && - (bitmapType == -1 || handler->GetType() == bitmapType) ) - return handler; + if ((bitmapType == wxBITMAP_TYPE_ANY) || (handler->GetType() == bitmapType)) + { + if (handler->GetExtension() == extension) + return handler; + if (handler->GetAltExtensions().Index(extension, false) != wxNOT_FOUND) + return handler; + } node = node->GetNext(); } - return 0; + return NULL; } -wxImageHandler *wxImage::FindHandler( long bitmapType ) +wxImageHandler *wxImage::FindHandler(wxBitmapType bitmapType ) { wxList::compatibility_iterator node = sm_handlers.GetFirst(); while (node) @@ -1395,7 +2677,7 @@ wxImageHandler *wxImage::FindHandler( long bitmapType ) if (handler->GetType() == bitmapType) return handler; node = node->GetNext(); } - return 0; + return NULL; } wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) @@ -1407,7 +2689,7 @@ wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler; node = node->GetNext(); } - return 0; + return NULL; } void wxImage::InitStandardHandlers() @@ -1441,6 +2723,8 @@ wxString wxImage::GetImageExtWildcard() { 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(";"); } @@ -1448,6 +2732,179 @@ wxString wxImage::GetImageExtWildcard() 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 ) + { + chMax = GREEN; + maximumRGB = green; + } + if ( blue > maximumRGB ) + { + chMax = BLUE; + maximumRGB = blue; + } + + const double value = maximumRGB; + + double hue = 0.0, saturation; + const double deltaRGB = maximumRGB - minimumRGB; + if ( wxIsNullDouble(deltaRGB) ) + { + // Gray has no color + hue = 0.0; + saturation = 0.0; + } + else + { + switch ( chMax ) + { + case RED: + hue = (green - blue) / deltaRGB; + break; + + case GREEN: + hue = 2.0 + (blue - red) / deltaRGB; + break; + + case BLUE: + hue = 4.0 + (red - green) / deltaRGB; + break; + + default: + wxFAIL_MSG(wxT("hue not specified")); + break; + } + + hue /= 6.0; + + if ( hue < 0.0 ) + hue += 1.0; + + saturation = deltaRGB / maximumRGB; + } + + return HSVValue(hue, saturation, value); +} + +wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv) +{ + double red, green, blue; + + if ( wxIsNullDouble(hsv.saturation) ) + { + // 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); + + switch (i) + { + 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; + } + } + + return RGBValue((unsigned char)(red * 255.0), + (unsigned char)(green * 255.0), + (unsigned char)(blue * 255.0)); +} + +/* + * 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(); + + unsigned char *srcBytePtr; + unsigned char *dstBytePtr; + unsigned long count; + wxImage::HSVValue hsv; + wxImage::RGBValue rgb; + + 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); + } +} + //----------------------------------------------------------------------------- // wxImageHandler //----------------------------------------------------------------------------- @@ -1455,49 +2912,57 @@ wxString wxImage::GetImageExtWildcard() IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject) #if wxUSE_STREAMS -bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) ) +int wxImageHandler::GetImageCount( wxInputStream& stream ) { - return false; -} + // NOTE: this code is the same of wxAnimationDecoder::CanRead and + // wxImageHandler::CallDoCanRead -bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) -{ - return false; -} + if ( !stream.IsSeekable() ) + return false; // can't test unseekable stream -int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) ) -{ - return 1; + wxFileOffset posOld = stream.TellI(); + int n = DoGetImageCount(stream); + + // restore the old position to be able to test other formats and so on + if ( stream.SeekI(posOld) == wxInvalidOffset ) + { + wxLogDebug(wxT("Failed to rewind the stream in wxImageHandler!")); + + // reading would fail anyhow as we're not at the right position + return false; + } + + return n; } bool wxImageHandler::CanRead( const wxString& name ) { - if (wxFileExists(name)) + wxImageFileInputStream stream(name); + if ( !stream.IsOk() ) { - wxFileInputStream stream(name); - return CanRead(stream); - } + wxLogError(_("Failed to check format of image file \"%s\"."), name); - wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() ); + return false; + } - return false; + return CanRead(stream); } bool wxImageHandler::CallDoCanRead(wxInputStream& stream) { - off_t posOld = stream.TellI(); - if ( posOld == wxInvalidOffset ) - { - // can't test unseekable stream - return false; - } + // NOTE: this code is the same of wxAnimationDecoder::CanRead and + // wxImageHandler::GetImageCount + + if ( !stream.IsSeekable() ) + return false; // can't test unseekable stream + wxFileOffset posOld = stream.TellI(); bool ok = DoCanRead(stream); // restore the old position to be able to test other formats and so on if ( stream.SeekI(posOld) == wxInvalidOffset ) { - wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!")); + wxLogDebug(wxT("Failed to rewind the stream in wxImageHandler!")); // reading would fail anyhow as we're not at the right position return false; @@ -1508,6 +2973,42 @@ bool wxImageHandler::CallDoCanRead(wxInputStream& stream) #endif // wxUSE_STREAMS +/* static */ +wxImageResolution +wxImageHandler::GetResolutionFromOptions(const wxImage& image, int *x, int *y) +{ + wxCHECK_MSG( x && y, wxIMAGE_RESOLUTION_NONE, wxT("NULL pointer") ); + + if ( image.HasOption(wxIMAGE_OPTION_RESOLUTIONX) && + image.HasOption(wxIMAGE_OPTION_RESOLUTIONY) ) + { + *x = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX); + *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); + } + else if ( image.HasOption(wxIMAGE_OPTION_RESOLUTION) ) + { + *x = + *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTION); + } + else // no resolution options specified + { + *x = + *y = 0; + + return wxIMAGE_RESOLUTION_NONE; + } + + // get the resolution unit too + int resUnit = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT); + if ( !resUnit ) + { + // this is the default + resUnit = wxIMAGE_RESOLUTION_INCHES; + } + + return (wxImageResolution)resUnit; +} + // ---------------------------------------------------------------------------- // image histogram stuff // ---------------------------------------------------------------------------- @@ -1638,18 +3139,7 @@ unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const * Rotation code by Carlos Moreno */ -// GRG: I've removed wxRotationPoint - we already have wxRealPoint which -// does exactly the same thing. And I also got rid of wxRotationPixel -// bacause of potential problems in architectures where alignment -// is an issue, so I had to rewrite parts of the code. - -static const double gs_Epsilon = 1e-10; - -static inline int wxCint (double x) -{ - return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5); -} - +static const double wxROTATE_EPSILON = 1e-10; // Auxiliary function to rotate a point (x,y) with respect to point p0 // make it inline and use a straight return to facilitate optimization @@ -1657,32 +3147,53 @@ static inline int wxCint (double x) // repeating the time-consuming calls to these functions -- sin/cos can // be computed and stored in the calling function. -inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0) +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); + 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); } -inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0) +static inline wxRealPoint +wxRotatePoint(double x, double y, double cos_angle, double sin_angle, + const wxRealPoint & p0) { - return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0); + return wxRotatePoint (wxRealPoint(x,y), cos_angle, sin_angle, p0); } -wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const +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; + + const bool has_alpha = HasAlpha(); + + const int w = GetWidth(); + const int h = GetHeight(); + int i; - angle = -angle; // screen coordinates are a mirror image of "real" coordinates // Create pointer-based array to accelerate access to wxImage's data - unsigned char ** data = new unsigned char * [GetHeight()]; - + unsigned char ** data = new unsigned char * [h]; data[0] = GetData(); + for (i = 1; i < h; i++) + data[i] = data[i - 1] + (3 * w); - for (i = 1; i < GetHeight(); i++) - data[i] = data[i - 1] + (3 * GetWidth()); + // Same for alpha channel + unsigned char ** alpha = NULL; + if (has_alpha) + { + alpha = new unsigned char * [h]; + alpha[0] = GetAlpha(); + for (i = 1; i < h; i++) + alpha[i] = alpha[i - 1] + w; + } // precompute coefficients for rotation formula - // (sine and cosine of the angle) const double cos_angle = cos(angle); const double sin_angle = sin(angle); @@ -1692,32 +3203,35 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y); - wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0); - wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0); - wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0); - wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0); + 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 x1 = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x))); - int y1 = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y))); - int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x))); - int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y))); + 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))); - wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false); + // 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) { - *offset_after_rotation = wxPoint (x1, y1); + *offset_after_rotation = wxPoint (x1a, y1a); } - // GRG: The rotated (destination) image is always accessed - // sequentially, so there is no need for a pointer-based - // array here (and in fact it would be slower). - // - unsigned char * dst = rotated.GetData(); + // 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(); - // GRG: if the original image has a mask, use its RGB values - // as the blank pixel, else, fall back to default (black). - // + 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; @@ -1734,46 +3248,45 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i // performing an inverse rotation (a rotation of -angle) and getting the // pixel at those coordinates - // GRG: I've taken the (interpolating) test out of the loops, so that - // it is done only once, instead of repeating it for each pixel. + const int rH = rotated.GetHeight(); + const int rW = rotated.GetWidth(); - int x; + // 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 y = 0; y < rotated.GetHeight(); y++) + for (int y = 0; y < rH; y++) { - for (x = 0; x < rotated.GetWidth(); x++) + for (int x = 0; x < rW; x++) { - wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0); + wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); - if (-0.25 < src.x && src.x < GetWidth() - 0.75 && - -0.25 < src.y && src.y < GetHeight() - 0.75) + if (-0.25 < src.x && src.x < w - 0.75 && + -0.25 < src.y && src.y < h - 0.75) { // interpolate using the 4 enclosing grid-points. Those // points can be obtained using floor and ceiling of the // exact coordinates of the point - // C.M. 2000-02-17: when the point is near the border, special care is required. - int x1, y1, x2, y2; - if (0 < src.x && src.x < GetWidth() - 1) + if (0 < src.x && src.x < w - 1) { - x1 = wxCint(floor(src.x)); - x2 = wxCint(ceil(src.x)); + x1 = wxRound(floor(src.x)); + x2 = wxRound(ceil(src.x)); } else // else means that x is near one of the borders (0 or width-1) { - x1 = x2 = wxCint (src.x); + x1 = x2 = wxRound (src.x); } - if (0 < src.y && src.y < GetHeight() - 1) + if (0 < src.y && src.y < h - 1) { - y1 = wxCint(floor(src.y)); - y2 = wxCint(ceil(src.y)); + y1 = wxRound(floor(src.y)); + y2 = wxRound(ceil(src.y)); } else { - y1 = y2 = wxCint (src.y); + y1 = y2 = wxRound (src.y); } // get four points and the distances (square of the distance, @@ -1782,7 +3295,7 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i // 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 < gs_Epsilon + // or d4 are < wxROTATE_EPSILON 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); @@ -1795,33 +3308,46 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i // If the point is exactly at one point of the grid of the source // image, then don't interpolate -- just assign the pixel - if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs() + // 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++); + *(dst++) = *p; + + if (has_alpha) + *(alpha_dst++) = *(alpha[y1] + x1); } - else if (d2 < gs_Epsilon) + else if (d2 < wxROTATE_EPSILON) { unsigned char *p = data[y1] + (3 * x2); *(dst++) = *(p++); *(dst++) = *(p++); - *(dst++) = *(p++); + *(dst++) = *p; + + if (has_alpha) + *(alpha_dst++) = *(alpha[y1] + x2); } - else if (d3 < gs_Epsilon) + else if (d3 < wxROTATE_EPSILON) { unsigned char *p = data[y2] + (3 * x2); *(dst++) = *(p++); *(dst++) = *(p++); - *(dst++) = *(p++); + *(dst++) = *p; + + if (has_alpha) + *(alpha_dst++) = *(alpha[y2] + x2); } - else if (d4 < gs_Epsilon) + else if (d4 < wxROTATE_EPSILON) { unsigned char *p = data[y2] + (3 * x1); *(dst++) = *(p++); *(dst++) = *(p++); - *(dst++) = *(p++); + *(dst++) = *p; + + if (has_alpha) + *(alpha_dst++) = *(alpha[y2] + x1); } else { @@ -1847,6 +3373,19 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i ( (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 @@ -1854,40 +3393,49 @@ wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool i *(dst++) = blank_r; *(dst++) = blank_g; *(dst++) = blank_b; + + if (has_alpha) + *(alpha_dst++) = 0; } } } } - else // not interpolating + else // not interpolating { - for (int y = 0; y < rotated.GetHeight(); y++) + for (int y = 0; y < rH; y++) { - for (x = 0; x < rotated.GetWidth(); x++) + for (int x = 0; x < rW; x++) { - wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0); + wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); - const int xs = wxCint (src.x); // wxCint rounds to the - const int ys = wxCint (src.y); // closest integer + const int xs = wxRound (src.x); // wxRound rounds to the + const int ys = wxRound (src.y); // closest integer - if (0 <= xs && xs < GetWidth() && - 0 <= ys && ys < GetHeight()) + if (0 <= xs && xs < w && 0 <= ys && ys < h) { unsigned char *p = data[ys] + (3 * xs); *(dst++) = *(p++); *(dst++) = *(p++); *(dst++) = *p; + + if (has_alpha) + *(alpha_dst++) = *(alpha[ys] + (xs)); } else { *(dst++) = blank_r; *(dst++) = blank_g; *(dst++) = blank_b; + + if (has_alpha) + *(alpha_dst++) = 255; } } } } delete [] data; + delete [] alpha; return rotated; } @@ -1905,8 +3453,8 @@ 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)