X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/bea74fbbebd7d859d94c803c1e0de3c8751a434b..f2c88494b6978bee502f4c856ba9dc7e3b7c3954:/src/common/image.cpp?ds=sidebyside diff --git a/src/common/image.cpp b/src/common/image.cpp index 714750f706..9defc7b068 100644 --- a/src/common/image.cpp +++ b/src/common/image.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: image.cpp +// Name: src/common/image.cpp // Purpose: wxImage // Author: Robert Roebling // RCS-ID: $Id$ @@ -7,10 +7,6 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "image.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -18,26 +14,30 @@ #pragma hdrstop #endif +#if wxUSE_IMAGE + #include "wx/image.h" -#include "wx/bitmap.h" -#include "wx/debug.h" -#include "wx/log.h" -#include "wx/app.h" + +#ifndef WX_PRECOMP + #include "wx/log.h" + #include "wx/app.h" + #include "wx/hash.h" + #include "wx/utils.h" + #include "wx/bitmap.h" + #include "wx/math.h" +#endif + #include "wx/filefn.h" #include "wx/wfstream.h" #include "wx/intl.h" #include "wx/module.h" -// For memcpy -#include - -#ifdef __SALFORDC__ - #undef FAR +#if wxUSE_XPM + #include "wx/xpmdecod.h" #endif -#ifdef __WXMSW__ - #include "wx/msw/private.h" -#endif +// For memcpy +#include //----------------------------------------------------------------------------- // wxImage @@ -45,1512 +45,2549 @@ class wxImageRefData: public wxObjectRefData { - public: wxImageRefData(); - ~wxImageRefData(); + virtual ~wxImageRefData(); int m_width; int m_height; unsigned char *m_data; + bool m_hasMask; unsigned char m_maskRed,m_maskGreen,m_maskBlue; + + // alpha channel data, may be NULL for the formats without alpha support + unsigned char *m_alpha; + bool m_ok; + + // if true, m_data is pointer to static data and shouldn't be freed + bool m_static; + + // same as m_static but for m_alpha + bool m_staticAlpha; + +#if wxUSE_PALETTE + wxPalette m_palette; +#endif // wxUSE_PALETTE + + wxArrayString m_optionNames; + wxArrayString m_optionValues; + + DECLARE_NO_COPY_CLASS(wxImageRefData) }; wxImageRefData::wxImageRefData() { m_width = 0; m_height = 0; - m_data = (unsigned char*) NULL; - m_ok = FALSE; + m_data = + m_alpha = (unsigned char *) NULL; + m_maskRed = 0; m_maskGreen = 0; m_maskBlue = 0; - m_hasMask = FALSE; + m_hasMask = false; + + m_ok = false; + m_static = + m_staticAlpha = false; } wxImageRefData::~wxImageRefData() { - if (m_data) free( m_data ); + if ( !m_static ) + free( m_data ); + if ( !m_staticAlpha ) + free( m_alpha ); } wxList wxImage::sm_handlers; +wxImage wxNullImage; + //----------------------------------------------------------------------------- -#define M_IMGDATA ((wxImageRefData *)m_refData) +#define M_IMGDATA wx_static_cast(wxImageRefData*, m_refData) -#if !USE_SHARED_LIBRARIES - IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) -#endif +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 ) +wxImage::wxImage( int width, int height, unsigned char* data, bool static_data ) { - Create( width, height ); + Create( width, height, data, static_data ); } -wxImage::wxImage( const wxString& name, long type ) +wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) { - LoadFile( name, type ); + Create( width, height, data, alpha, static_data ); } -wxImage::wxImage( const wxString& name, const wxString& mimetype ) +wxImage::wxImage( const wxString& name, long type, int index ) { - LoadFile( name, mimetype ); + LoadFile( name, type, index ); } -#if wxUSE_STREAMS -wxImage::wxImage( wxInputStream& stream, long type ) +wxImage::wxImage( const wxString& name, const wxString& mimetype, int index ) { - LoadFile( stream, type ); + LoadFile( name, mimetype, index ); } -wxImage::wxImage( wxInputStream& stream, const wxString& mimetype ) +#if wxUSE_STREAMS +wxImage::wxImage( wxInputStream& stream, long type, int index ) { - LoadFile( stream, mimetype ); + LoadFile( stream, type, index ); } -#endif // wxUSE_STREAMS -wxImage::wxImage( const wxImage& image ) +wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index ) { - Ref(image); + LoadFile( stream, mimetype, index ); } +#endif // wxUSE_STREAMS -wxImage::wxImage( const wxImage* image ) +wxImage::wxImage( const char** xpmData ) { - if (image) Ref(*image); + Create(xpmData); } -void wxImage::Create( int width, int height ) +wxImage::wxImage( char** xpmData ) { - m_refData = new wxImageRefData(); - - M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 ); - if (M_IMGDATA->m_data) - { - for (int l = 0; l < width*height*3; l++) M_IMGDATA->m_data[l] = 0; - - M_IMGDATA->m_width = width; - M_IMGDATA->m_height = height; - M_IMGDATA->m_ok = TRUE; - } - else - { - UnRef(); - } + Create((const char**) xpmData); } -void wxImage::Destroy() +bool wxImage::Create( const char** xpmData ) { +#if wxUSE_XPM UnRef(); + + wxXPMDecoder decoder; + (*this) = decoder.ReadData(xpmData); + return Ok(); +#else + return false; +#endif } -wxImage wxImage::Scale( int width, int height ) +bool wxImage::Create( int width, int height, bool clear ) { - wxImage image; - - wxCHECK_MSG( Ok(), image, _T("invalid image") ); - - wxCHECK_MSG( (width > 0) && (height > 0), image, _T("invalid image size") ); - - image.Create( width, height ); - - char unsigned *data = image.GetData(); - - wxCHECK_MSG( data, image, _T("unable to create image") ); - - if (M_IMGDATA->m_hasMask) - image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); - - long old_height = M_IMGDATA->m_height; - long old_width = M_IMGDATA->m_width; + UnRef(); - char unsigned *source_data = M_IMGDATA->m_data; - char unsigned *target_data = data; + m_refData = new wxImageRefData(); - for (long j = 0; j < height; j++) + M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 ); + if (!M_IMGDATA->m_data) { - long y_offset = (j * old_height / height) * old_width; - - for (long i = 0; i < width; i++) - { - memcpy( target_data, - source_data + 3*(y_offset + ((i * old_width )/ width)), - 3 ); - target_data += 3; - } + UnRef(); + return false; } - return image; -} - -void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) -{ - wxCHECK_RET( Ok(), _T("invalid image") ); - - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; - - 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 ) -{ - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); - - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + if (clear) + memset(M_IMGDATA->m_data, 0, width*height*3); - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_width = width; + M_IMGDATA->m_height = height; + M_IMGDATA->m_ok = true; - long pos = (y * w + x) * 3; - - return M_IMGDATA->m_data[pos]; + return true; } -unsigned char wxImage::GetGreen( int x, int y ) +bool wxImage::Create( int width, int height, unsigned char* data, bool static_data ) { - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); + UnRef(); - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") ); - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_data = data; + M_IMGDATA->m_width = width; + M_IMGDATA->m_height = height; + M_IMGDATA->m_ok = true; + M_IMGDATA->m_static = static_data; - return M_IMGDATA->m_data[pos+1]; + return true; } -unsigned char wxImage::GetBlue( int x, int y ) +bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) { - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); + UnRef(); - int w = M_IMGDATA->m_width; - int h = M_IMGDATA->m_height; + wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") ); - wxCHECK_MSG( (x>=0) && (y>=0) && (xm_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; - return M_IMGDATA->m_data[pos+2]; + return true; } -bool wxImage::Ok() const +void wxImage::Destroy() { - return (M_IMGDATA && M_IMGDATA->m_ok); + UnRef(); } -char unsigned *wxImage::GetData() const +wxObjectRefData* wxImage::CreateRefData() const { - wxCHECK_MSG( Ok(), (char unsigned *)NULL, _T("invalid image") ); - - return M_IMGDATA->m_data; + return new wxImageRefData; } -void wxImage::SetData( char unsigned *data ) +wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const { - wxCHECK_RET( Ok(), _T("invalid image") ); - - memcpy(M_IMGDATA->m_data, data, M_IMGDATA->m_width * M_IMGDATA->m_height * 3); + const wxImageRefData* refData = wx_static_cast(const wxImageRefData*, 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; } -void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) +wxImage wxImage::Copy() const { - wxCHECK_RET( Ok(), _T("invalid image") ); + wxImage image; - M_IMGDATA->m_maskRed = r; - M_IMGDATA->m_maskGreen = g; - M_IMGDATA->m_maskBlue = b; - M_IMGDATA->m_hasMask = TRUE; -} + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); -unsigned char wxImage::GetMaskRed() const -{ - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); + image.m_refData = CloneRefData(m_refData); - return M_IMGDATA->m_maskRed; + return image; } -unsigned char wxImage::GetMaskGreen() const +wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const { - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); + if( xFactor == 1 && yFactor == 1 ) + return *this; - return M_IMGDATA->m_maskGreen; -} + wxImage image; -unsigned char wxImage::GetMaskBlue() const -{ - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); - return M_IMGDATA->m_maskBlue; -} + // can't scale to/from 0 size + wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image, + wxT("invalid new image size") ); -void wxImage::SetMask( bool mask ) -{ - wxCHECK_RET( Ok(), _T("invalid image") ); + long old_height = M_IMGDATA->m_height, + old_width = M_IMGDATA->m_width; - M_IMGDATA->m_hasMask = mask; -} + wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, + wxT("invalid old image size") ); -bool wxImage::HasMask() const -{ - wxCHECK_MSG( Ok(), FALSE, _T("invalid image") ); + long width = old_width / xFactor ; + long height = old_height / yFactor ; - return M_IMGDATA->m_hasMask; -} + image.Create( width, height, false ); -int wxImage::GetWidth() const -{ - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); + char unsigned *data = image.GetData(); - return M_IMGDATA->m_width; -} + wxCHECK_MSG( data, image, wxT("unable to create image") ); -int wxImage::GetHeight() const -{ - wxCHECK_MSG( Ok(), 0, _T("invalid image") ); + bool hasMask = false ; + unsigned char maskRed = 0; + unsigned char maskGreen = 0; + unsigned char maskBlue =0 ; - return M_IMGDATA->m_height; -} + unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data = data; + unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; + if (M_IMGDATA->m_hasMask) + { + hasMask = true ; + maskRed = M_IMGDATA->m_maskRed; + maskGreen = M_IMGDATA->m_maskGreen; + maskBlue =M_IMGDATA->m_maskBlue ; + + image.SetMaskColour( M_IMGDATA->m_maskRed, + M_IMGDATA->m_maskGreen, + M_IMGDATA->m_maskBlue ); + } + else + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + target_alpha = image.GetAlpha() ; + } + } -bool wxImage::LoadFile( const wxString& filename, long type ) -{ -#if wxUSE_STREAMS - if (wxFileExists(filename)) + for (long y = 0; y < height; y++) { - wxFileInputStream stream(filename); - return LoadFile(stream, type); + for (long x = 0; x < width; x++) + { + unsigned long avgRed = 0 ; + unsigned long avgGreen = 0; + unsigned long avgBlue = 0; + unsigned long avgAlpha = 0 ; + unsigned long counter = 0 ; + // determine average + for ( int y1 = 0 ; y1 < yFactor ; ++y1 ) + { + long y_offset = (y * yFactor + y1) * old_width; + for ( int x1 = 0 ; x1 < xFactor ; ++x1 ) + { + unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ; + unsigned char red = pixel[0] ; + unsigned char green = pixel[1] ; + unsigned char blue = pixel[2] ; + unsigned char alpha = 255 ; + if ( source_alpha ) + alpha = *(source_alpha + y_offset + x * xFactor + x1) ; + if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue ) + { + if ( alpha > 0 ) + { + avgRed += red ; + avgGreen += green ; + avgBlue += blue ; + } + avgAlpha += alpha ; + counter++ ; + } + } + } + if ( counter == 0 ) + { + *(target_data++) = M_IMGDATA->m_maskRed ; + *(target_data++) = M_IMGDATA->m_maskGreen ; + *(target_data++) = M_IMGDATA->m_maskBlue ; + } + else + { + if ( source_alpha ) + *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ; + *(target_data++) = (unsigned char)(avgRed / counter); + *(target_data++) = (unsigned char)(avgGreen / counter); + *(target_data++) = (unsigned char)(avgBlue / counter); + } + } } - else { - wxLogError( _T("Can't load image from file '%s': file does not exist."), filename.c_str() ); + // In case this is a cursor, make sure the hotspot is scaled accordingly: + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, + (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor); + if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) + image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, + (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y))/yFactor); - return FALSE; - } -#else // !wxUSE_STREAMS - return FALSE; -#endif // wxUSE_STREAMS + return image; } -bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype ) +wxImage wxImage::Scale( int width, int height ) const { -#if wxUSE_STREAMS - if (wxFileExists(filename)) - { - wxFileInputStream stream(filename); - return LoadFile(stream, mimetype); - } + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); - else { - wxLogError( _T("Can't load image from file '%s': file does not exist."), filename.c_str() ); + // can't scale to/from 0 size + wxCHECK_MSG( (width > 0) && (height > 0), image, + wxT("invalid new image size") ); - return FALSE; + 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") ); + + if ( old_width % width == 0 && old_width >= width && + old_height % height == 0 && old_height >= height ) + { + return ShrinkBy( old_width / width , old_height / height ) ; } -#else // !wxUSE_STREAMS - return FALSE; -#endif // wxUSE_STREAMS -} + image.Create( width, height, false ); -bool wxImage::SaveFile( const wxString& filename, int type ) -{ -#if wxUSE_STREAMS - wxFileOutputStream stream(filename); + unsigned char *data = image.GetData(); - if ( stream.LastError() == wxStream_NOERROR ) - return SaveFile(stream, type); - else -#endif // wxUSE_STREAMS - return FALSE; -} + wxCHECK_MSG( data, image, wxT("unable to create image") ); -bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) -{ -#if wxUSE_STREAMS - wxFileOutputStream stream(filename); + unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data = data; + unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; - if ( stream.LastError() == wxStream_NOERROR ) - return SaveFile(stream, mimetype); + if (M_IMGDATA->m_hasMask) + { + image.SetMaskColour( M_IMGDATA->m_maskRed, + M_IMGDATA->m_maskGreen, + M_IMGDATA->m_maskBlue ); + } else -#endif // wxUSE_STREAMS - return FALSE; -} + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + target_alpha = image.GetAlpha() ; + } + } -#if wxUSE_STREAMS -bool wxImage::LoadFile( wxInputStream& stream, long type ) -{ - UnRef(); + long x_delta = (old_width<<16) / width; + long y_delta = (old_height<<16) / height; - m_refData = new wxImageRefData; + unsigned char* dest_pixel = target_data; - wxImageHandler *handler = FindHandler(type); + long y = 0; + for ( long j = 0; j < height; j++ ) + { + unsigned char* src_line = &source_data[(y>>16)*old_width*3]; + unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ; - if (handler == NULL) - { - wxLogWarning( _T("No image handler for type %d defined."), type ); + long x = 0; + for ( long i = 0; i < width; i++ ) + { + unsigned char* src_pixel = &src_line[(x>>16)*3]; + unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ; + dest_pixel[0] = src_pixel[0]; + dest_pixel[1] = src_pixel[1]; + dest_pixel[2] = src_pixel[2]; + dest_pixel += 3; + if ( source_alpha ) + *(target_alpha++) = *src_alpha_pixel ; + x += x_delta; + } - return FALSE; + y += y_delta; } - return handler->LoadFile( this, stream ); + // 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; } -bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype ) +wxImage wxImage::Rotate90( bool clockwise ) const { - UnRef(); + wxImage image; - m_refData = new wxImageRefData; + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); - wxImageHandler *handler = FindHandlerMime(mimetype); + image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false ); - if (handler == NULL) - { - wxLogWarning( _T("No image handler for type %s defined."), mimetype.GetData() ); + unsigned char *data = image.GetData(); - return FALSE; - } + wxCHECK_MSG( data, image, wxT("unable to create image") ); - return handler->LoadFile( this, stream ); -} + unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data; + unsigned char *alpha_data = 0 ; + unsigned char *source_alpha = 0 ; + unsigned char *target_alpha = 0 ; -bool wxImage::SaveFile( wxOutputStream& stream, int type ) -{ - wxCHECK_MSG( Ok(), FALSE, _T("invalid image") ); + if (M_IMGDATA->m_hasMask) + { + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + } + else + { + source_alpha = M_IMGDATA->m_alpha ; + if ( source_alpha ) + { + image.SetAlpha() ; + alpha_data = image.GetAlpha() ; + } + } - wxImageHandler *handler = FindHandler(type); + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; - if (handler == NULL) + for (long j = 0; j < height; j++) { - wxLogWarning( _T("No image handler for type %d defined."), type ); + for (long i = 0; i < width; i++) + { + if (clockwise) + { + target_data = data + (((i+1)*height) - j - 1)*3; + if(source_alpha) + target_alpha = alpha_data + (((i+1)*height) - j - 1); + } + else + { + target_data = data + ((height*(width-1)) + j - (i*height))*3; + if(source_alpha) + target_alpha = alpha_data + ((height*(width-1)) + j - (i*height)); + } + memcpy( target_data, source_data, 3 ); + source_data += 3; - return FALSE; + if(source_alpha) + { + memcpy( target_alpha, source_alpha, 1 ); + source_alpha += 1; + } + } } - return handler->SaveFile( this, stream ); + return image; } -bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) +wxImage wxImage::Mirror( bool horizontally ) const { - wxCHECK_MSG( Ok(), FALSE, _T("invalid image") ); + wxImage image; - wxImageHandler *handler = FindHandlerMime(mimetype); + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); - if (handler == NULL) - { - wxLogWarning( _T("No image handler for type %s defined."), mimetype.GetData() ); + image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); - return FALSE; - } + unsigned char *data = image.GetData(); + unsigned char *alpha = NULL; - return handler->SaveFile( this, stream ); -} -#endif // wxUSE_STREAMS + wxCHECK_MSG( data, image, wxT("unable to create image") ); -void wxImage::AddHandler( wxImageHandler *handler ) -{ - // make sure that the memory will be freed at the program end - sm_handlers.DeleteContents(TRUE); + if (M_IMGDATA->m_alpha != NULL) { + image.SetAlpha(); + alpha = image.GetAlpha(); + wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") ); + } - sm_handlers.Append( handler ); -} + if (M_IMGDATA->m_hasMask) + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); -void wxImage::InsertHandler( wxImageHandler *handler ) -{ - // make sure that the memory will be freed at the program end - sm_handlers.DeleteContents(TRUE); + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; - sm_handlers.Insert( handler ); -} + unsigned char *source_data = M_IMGDATA->m_data; + unsigned char *target_data; -bool wxImage::RemoveHandler( const wxString& name ) -{ - wxImageHandler *handler = FindHandler(name); - if (handler) + if (horizontally) { - sm_handlers.DeleteObject(handler); - return TRUE; - } - else - return FALSE; -} - -wxImageHandler *wxImage::FindHandler( const wxString& name ) -{ - wxNode *node = sm_handlers.First(); - while (node) + for (long j = 0; j < height; j++) + { + data += width*3; + target_data = data-3; + for (long i = 0; i < width; i++) + { + memcpy( target_data, source_data, 3 ); + source_data += 3; + target_data -= 3; + } + } + + if (alpha != NULL) + { + // src_alpha starts at the first pixel and increases by 1 after each step + // (a step here is the copy of the alpha value of one pixel) + const unsigned char *src_alpha = M_IMGDATA->m_alpha; + // dest_alpha starts just beyond the first line, decreases before each step, + // and after each line is finished, increases by 2 widths (skipping the line + // just copied and the line that will be copied next) + unsigned char *dest_alpha = alpha + width; + + for (long jj = 0; jj < height; ++jj) + { + for (long i = 0; i < width; ++i) { + *(--dest_alpha) = *(src_alpha++); // copy one pixel + } + dest_alpha += 2 * width; // advance beyond the end of the next line + } + } + } + else { - wxImageHandler *handler = (wxImageHandler*)node->Data(); - if (handler->GetName().Cmp(name) == 0) return handler; + for (long i = 0; i < height; i++) + { + target_data = data + 3*width*(height-1-i); + memcpy( target_data, source_data, (size_t)3*width ); + source_data += 3*width; + } - node = node->Next(); + if (alpha != NULL) + { + // src_alpha starts at the first pixel and increases by 1 width after each step + // (a step here is the copy of the alpha channel of an entire line) + const unsigned char *src_alpha = M_IMGDATA->m_alpha; + // dest_alpha starts just beyond the last line (beyond the whole image) + // and decreases by 1 width before each step + unsigned char *dest_alpha = alpha + width * height; + + for (long jj = 0; jj < height; ++jj) + { + dest_alpha -= width; + memcpy( dest_alpha, src_alpha, (size_t)width ); + src_alpha += width; + } + } } - return (wxImageHandler *)NULL; + + return image; } -wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType ) +wxImage wxImage::GetSubImage( const wxRect &rect ) const { - wxNode *node = sm_handlers.First(); - while (node) + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && + (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), + image, wxT("invalid subimage size") ); + + const int subwidth = rect.GetWidth(); + const int subheight = rect.GetHeight(); + + image.Create( subwidth, subheight, false ); + + const unsigned char *src_data = GetData(); + const unsigned char *src_alpha = M_IMGDATA->m_alpha; + unsigned char *subdata = image.GetData(); + unsigned char *subalpha = NULL; + + wxCHECK_MSG( subdata, image, wxT("unable to create image") ); + + if (src_alpha != NULL) { + image.SetAlpha(); + subalpha = image.GetAlpha(); + wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel")); + } + + if (M_IMGDATA->m_hasMask) + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + + const int width = GetWidth(); + const int pixsoff = rect.GetLeft() + width * rect.GetTop(); + + src_data += 3 * pixsoff; + src_alpha += pixsoff; // won't be used if was NULL, so this is ok + + for (long j = 0; j < subheight; ++j) { - wxImageHandler *handler = (wxImageHandler*)node->Data(); - if ( (handler->GetExtension().Cmp(extension) == 0) && - (bitmapType == -1 || handler->GetType() == bitmapType) ) - return handler; - node = node->Next(); + 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 (wxImageHandler*)NULL; + + return image; } -wxImageHandler *wxImage::FindHandler( long bitmapType ) +wxImage wxImage::Size( const wxSize& size, const wxPoint& pos, + int r_, int g_, int b_ ) const { - wxNode *node = sm_handlers.First(); - while (node) + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") ); + + int width = GetWidth(), height = GetHeight(); + image.Create(size.GetWidth(), size.GetHeight(), false); + + unsigned char r = (unsigned char)r_; + unsigned char g = (unsigned char)g_; + unsigned char b = (unsigned char)b_; + if ((r_ == -1) && (g_ == -1) && (b_ == -1)) { - wxImageHandler *handler = (wxImageHandler *)node->Data(); - if (handler->GetType() == bitmapType) return handler; - node = node->Next(); + GetOrFindMaskColour( &r, &g, &b ); + image.SetMaskColour(r, g, b); + } + + image.SetRGB(wxRect(), r, g, b); + + wxRect subRect(pos.x, pos.y, width, height); + wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight()); + if (pos.x < 0) + finalRect.width -= pos.x; + if (pos.y < 0) + finalRect.height -= pos.y; + + subRect.Intersect(finalRect); + + if (!subRect.IsEmpty()) + { + if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height)) + image.Paste(*this, pos.x, pos.y); + else + image.Paste(GetSubImage(subRect), pos.x, pos.y); } - return NULL; + + return image; } -wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) +void wxImage::Paste( const wxImage &image, int x, int y ) { - wxNode *node = sm_handlers.First(); - while (node) + wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_RET( image.Ok(), wxT("invalid image") ); + + AllocExclusive(); + + int xx = 0; + int yy = 0; + int width = image.GetWidth(); + int height = image.GetHeight(); + + if (x < 0) + { + xx = -x; + width += x; + } + if (y < 0) + { + yy = -y; + height += y; + } + + if ((x+xx)+width > M_IMGDATA->m_width) + width = M_IMGDATA->m_width - (x+xx); + if ((y+yy)+height > M_IMGDATA->m_height) + height = M_IMGDATA->m_height - (y+yy); + + if (width < 1) return; + if (height < 1) return; + + if ((!HasMask() && !image.HasMask()) || + (HasMask() && !image.HasMask()) || + ((HasMask() && image.HasMask() && + (GetMaskRed()==image.GetMaskRed()) && + (GetMaskGreen()==image.GetMaskGreen()) && + (GetMaskBlue()==image.GetMaskBlue())))) + { + width *= 3; + unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); + int source_step = image.GetWidth()*3; + + unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; + int target_step = M_IMGDATA->m_width*3; + for (int j = 0; j < height; j++) + { + memcpy( target_data, source_data, width ); + source_data += source_step; + target_data += target_step; + } + return; + } + + if (!HasMask() && image.HasMask()) { - wxImageHandler *handler = (wxImageHandler *)node->Data(); - if (handler->GetMimeType().IsSameAs(mimetype, FALSE)) return handler; - node = node->Next(); + unsigned char r = image.GetMaskRed(); + unsigned char g = image.GetMaskGreen(); + unsigned char b = image.GetMaskBlue(); + + width *= 3; + unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); + int source_step = image.GetWidth()*3; + + unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; + int target_step = M_IMGDATA->m_width*3; + + for (int j = 0; j < height; j++) + { + for (int i = 0; i < width; i+=3) + { + if ((source_data[i] != r) && + (source_data[i+1] != g) && + (source_data[i+2] != b)) + { + memcpy( target_data+i, source_data+i, 3 ); + } + } + source_data += source_step; + target_data += target_step; + } } - return NULL; } -void wxImage::InitStandardHandlers() +void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1, + unsigned char r2, unsigned char g2, unsigned char b2 ) { - AddHandler( new wxBMPHandler ); + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + unsigned char *data = GetData(); + + const int w = GetWidth(); + const int h = GetHeight(); + + for (int j = 0; j < h; j++) + for (int i = 0; i < w; i++) + { + if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1)) + { + data[0] = r2; + data[1] = g2; + data[2] = b2; + } + data += 3; + } } -void wxImage::CleanUpHandlers() +wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const { - wxNode *node = sm_handlers.First(); - while (node) + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); + + unsigned char *dest = image.GetData(); + + wxCHECK_MSG( dest, image, wxT("unable to create image") ); + + unsigned char *src = M_IMGDATA->m_data; + bool hasMask = M_IMGDATA->m_hasMask; + unsigned char maskRed = M_IMGDATA->m_maskRed; + unsigned char maskGreen = M_IMGDATA->m_maskGreen; + unsigned char maskBlue = M_IMGDATA->m_maskBlue; + + if ( hasMask ) + image.SetMaskColour(maskRed, maskGreen, maskBlue); + + const long size = M_IMGDATA->m_width * M_IMGDATA->m_height; + for ( long i = 0; i < size; i++, src += 3, dest += 3 ) { - wxImageHandler *handler = (wxImageHandler *)node->Data(); - wxNode *next = node->Next(); - delete handler; - delete node; - node = next; + // don't modify the mask + if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue ) + { + memcpy(dest, src, 3); + } + else + { + // calculate the luma + double luma = (src[0] * lr + src[1] * lg + src[2] * lb) + 0.5; + dest[0] = dest[1] = dest[2] = wx_static_cast(unsigned char, luma); + } } + + // copy the alpha channel, if any + if (HasAlpha()) + { + const size_t alphaSize = GetWidth() * GetHeight(); + unsigned char *alpha = (unsigned char*)malloc(alphaSize); + memcpy(alpha, GetAlpha(), alphaSize); + image.InitAlpha(); + image.SetAlpha(alpha); + } + + return image; } -//----------------------------------------------------------------------------- -// wxImageHandler -//----------------------------------------------------------------------------- +wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const +{ + wxImage image; -#if !USE_SHARED_LIBRARIES -IMPLEMENT_DYNAMIC_CLASS(wxImageHandler,wxObject) -#endif + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); -#if wxUSE_STREAMS -bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream) ) + image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); + + unsigned char *data = image.GetData(); + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + if (M_IMGDATA->m_hasMask) + { + if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g && + M_IMGDATA->m_maskBlue == b) + image.SetMaskColour( 255, 255, 255 ); + else + image.SetMaskColour( 0, 0, 0 ); + } + + long size = M_IMGDATA->m_height * M_IMGDATA->m_width; + + unsigned char *srcd = M_IMGDATA->m_data; + unsigned char *tard = image.GetData(); + + for ( long i = 0; i < size; i++, srcd += 3, tard += 3 ) + { + 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; + } + + return image; +} + +int wxImage::GetWidth() const { - return FALSE; + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_width; } -bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream) ) +int wxImage::GetHeight() const { - return FALSE; + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_height; } -#endif // wxUSE_STREAMS -//----------------------------------------------------------------------------- -// MSW conversion routines -//----------------------------------------------------------------------------- +long wxImage::XYToIndex(int x, int y) const +{ + if ( Ok() && + x >= 0 && y >= 0 && + x < M_IMGDATA->m_width && y < M_IMGDATA->m_height ) + { + return y*M_IMGDATA->m_width + x; + } + + return -1; +} + +void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) +{ + long pos = XYToIndex(x, y); + wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); -#ifdef __WXMSW__ + AllocExclusive(); -wxBitmap wxImage::ConvertToBitmap() const + pos *= 3; + + M_IMGDATA->m_data[ pos ] = r; + M_IMGDATA->m_data[ pos+1 ] = g; + M_IMGDATA->m_data[ pos+2 ] = b; +} + +void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b ) { - // sizeLimit is the MS upper limit for the DIB size - int sizeLimit = 1024*768*3; + wxCHECK_RET( Ok(), wxT("invalid image") ); - // width and height of the device-dependent bitmap - int width = GetWidth(); - int bmpHeight = GetHeight(); + AllocExclusive(); - // calc the number of bytes per scanline and padding - int bytePerLine = width*3; - int sizeDWORD = sizeof( DWORD ); - div_t lineBoundary = div( bytePerLine, sizeDWORD ); - int padding = 0; - if( lineBoundary.rem > 0 ) + wxRect rect(rect_); + wxRect imageRect(0, 0, GetWidth(), GetHeight()); + if ( rect == wxRect() ) { - padding = sizeDWORD - lineBoundary.rem; - bytePerLine += padding; + rect = imageRect; } - // calc the number of DIBs and heights of DIBs - int numDIB = 1; - int hRemain = 0; - int height = sizeLimit/bytePerLine; - if( height >= bmpHeight ) - height = bmpHeight; else { - div_t result = div( bmpHeight, height ); - numDIB = result.quot; - hRemain = result.rem; - if( hRemain >0 ) numDIB++; - } - - // set bitmap parameters - wxBitmap bitmap; - wxCHECK_MSG( Ok(), bitmap, _T("invalid image") ); - bitmap.SetWidth( width ); - bitmap.SetHeight( bmpHeight ); - bitmap.SetDepth( wxDisplayDepth() ); - - // create a DIB header - int headersize = sizeof(BITMAPINFOHEADER); - LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); - wxCHECK_MSG( lpDIBh, bitmap, _T("could not allocate memory for DIB header") ); - // Fill in the DIB header - lpDIBh->bmiHeader.biSize = headersize; - lpDIBh->bmiHeader.biWidth = (DWORD)width; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - // the general formula for biSizeImage: - // ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height; - lpDIBh->bmiHeader.biPlanes = 1; - lpDIBh->bmiHeader.biBitCount = 24; - lpDIBh->bmiHeader.biCompression = BI_RGB; - lpDIBh->bmiHeader.biClrUsed = 0; - // These seem not really needed for our purpose here. - lpDIBh->bmiHeader.biClrImportant = 0; - lpDIBh->bmiHeader.biXPelsPerMeter = 0; - lpDIBh->bmiHeader.biYPelsPerMeter = 0; - // memory for DIB data - unsigned char *lpBits; - lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage ); - if( !lpBits ) - { - wxFAIL_MSG( _T("could not allocate memory for DIB") ); - free( lpDIBh ); - return bitmap; - } - - // create and set the device-dependent bitmap - HDC hdc = ::GetDC(NULL); - HDC memdc = ::CreateCompatibleDC( hdc ); - HBITMAP hbitmap; - hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight ); - ::SelectObject( memdc, hbitmap); - - // copy image data into DIB data and then into DDB (in a loop) - unsigned char *data = GetData(); - int i, j, n; - int origin = 0; - unsigned char *ptdata = data; - unsigned char *ptbits; + wxCHECK_RET( imageRect.Inside(rect.GetTopLeft()) && + imageRect.Inside(rect.GetBottomRight()), + wxT("invalid bounding rectangle") ); + } - for( n=0; n 1 && n == numDIB-1 && hRemain > 0 ) + data = M_IMGDATA->m_data + (y*width + x1)*3; + for (x = x1; x < x2; x++) { - // redefine height and size of the (possibly) last smaller DIB - // memory is not reallocated - height = hRemain; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; + *data++ = r; + *data++ = g; + *data++ = b; } - ptbits = lpBits; + } +} - for( j=0; jbmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS ); - // The above line is equivalent to the following two lines. - // hbitmap = ::CreateCompatibleBitmap( hdc, width, height ); - // ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS); - // or the following lines - // hbitmap = ::CreateCompatibleBitmap( hdc, width, height ); - // HDC memdc = ::CreateCompatibleDC( hdc ); - // ::SelectObject( memdc, hbitmap); - // ::SetDIBitsToDevice( memdc, 0, 0, width, height, - // 0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS); - // ::SelectObject( memdc, 0 ); - // ::DeleteDC( memdc ); - } - bitmap.SetHBITMAP( (WXHBITMAP) hbitmap ); - - // similarly, created an mono-bitmap for the possible mask - if( HasMask() ) - { - hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL ); - ::SelectObject( memdc, hbitmap); - if( numDIB == 1 ) height = bmpHeight; - else height = sizeLimit/bytePerLine; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - origin = 0; - unsigned char r = GetMaskRed(); - unsigned char g = GetMaskGreen(); - unsigned char b = GetMaskBlue(); - unsigned char zero = 0, one = 255; - ptdata = data; - for( n=0; nm_data[pos]; +} + +unsigned char wxImage::GetGreen( int x, int y ) const +{ + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + pos *= 3; + + return M_IMGDATA->m_data[pos+1]; +} + +unsigned char wxImage::GetBlue( int x, int y ) const +{ + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + pos *= 3; + + return M_IMGDATA->m_data[pos+2]; +} + +bool wxImage::Ok() const +{ + // image of 0 width or height can't be considered ok - at least because it + // causes crashes in ConvertToBitmap() if we don't catch it in time + wxImageRefData *data = M_IMGDATA; + return data && data->m_ok && data->m_width && data->m_height; +} + +unsigned char *wxImage::GetData() const +{ + wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); + + return M_IMGDATA->m_data; +} + +void wxImage::SetData( unsigned char *data, bool static_data ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + wxImageRefData *newRefData = new wxImageRefData(); + + newRefData->m_width = M_IMGDATA->m_width; + newRefData->m_height = M_IMGDATA->m_height; + newRefData->m_data = data; + newRefData->m_ok = true; + newRefData->m_maskRed = M_IMGDATA->m_maskRed; + newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; + newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; + newRefData->m_hasMask = M_IMGDATA->m_hasMask; + newRefData->m_static = static_data; + + UnRef(); + + m_refData = newRefData; +} + +void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data ) +{ + wxImageRefData *newRefData = new wxImageRefData(); + + if (m_refData) + { + newRefData->m_width = new_width; + newRefData->m_height = new_height; + newRefData->m_data = data; + newRefData->m_ok = true; + newRefData->m_maskRed = M_IMGDATA->m_maskRed; + newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; + newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; + newRefData->m_hasMask = M_IMGDATA->m_hasMask; + } + else + { + newRefData->m_width = new_width; + newRefData->m_height = new_height; + newRefData->m_data = data; + newRefData->m_ok = true; + } + newRefData->m_static = static_data; + + UnRef(); + + m_refData = newRefData; +} + +// ---------------------------------------------------------------------------- +// alpha channel support +// ---------------------------------------------------------------------------- + +void wxImage::SetAlpha(int x, int y, unsigned char alpha) +{ + wxCHECK_RET( HasAlpha(), wxT("no alpha channel") ); + + long pos = XYToIndex(x, y); + wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); + + AllocExclusive(); + + M_IMGDATA->m_alpha[pos] = alpha; +} + +unsigned char wxImage::GetAlpha(int x, int y) const +{ + wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") ); + + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); + + return M_IMGDATA->m_alpha[pos]; +} + +bool +wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b) +{ + SetAlpha(NULL); + + const int w = M_IMGDATA->m_width; + const int h = M_IMGDATA->m_height; + + unsigned char *alpha = GetAlpha(); + unsigned char *data = GetData(); + + for ( int y = 0; y < h; y++ ) + { + for ( int x = 0; x < w; x++ ) { - if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 ) - { - // redefine height and size of the (possibly) last smaller DIB - // memory is not reallocated - height = hRemain; - lpDIBh->bmiHeader.biHeight = (DWORD)(-height); - lpDIBh->bmiHeader.biSizeImage = bytePerLine*height; - } - ptbits = lpBits; - for( int j=0; jSetMaskBitmap( (WXHBITMAP) hbitmap ); - bitmap.SetMask( mask ); - // It will be deleted when the wxBitmap object is deleted (as of 01/1999) - /* The following can also be used but is slow to run - wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue()); - wxMask *mask = new wxMask( bitmap, colour ); - bitmap.SetMask( mask ); - */ - } - - // free allocated resources - ::SelectObject( memdc, 0 ); - ::DeleteDC( memdc ); - ::ReleaseDC(NULL, hdc); - free(lpDIBh); - free(lpBits); - - // check the wxBitmap object - if( bitmap.GetHBITMAP() ) - bitmap.SetOk( TRUE ); - else - bitmap.SetOk( FALSE ); + } + + return true; +} - return bitmap; +void wxImage::SetAlpha( unsigned char *alpha, bool static_data ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + if ( !alpha ) + { + alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height); + } + + free(M_IMGDATA->m_alpha); + M_IMGDATA->m_alpha = alpha; + M_IMGDATA->m_staticAlpha = static_data; +} + +unsigned char *wxImage::GetAlpha() const +{ + wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); + + return M_IMGDATA->m_alpha; +} + +void wxImage::InitAlpha() +{ + wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") ); + + // initialize memory for alpha channel + SetAlpha(); + + unsigned char *alpha = M_IMGDATA->m_alpha; + const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height; + + if ( HasMask() ) + { + // use the mask to initialize the alpha channel. + const unsigned char * const alphaEnd = alpha + lenAlpha; + + const unsigned char mr = M_IMGDATA->m_maskRed; + const unsigned char mg = M_IMGDATA->m_maskGreen; + const unsigned char mb = M_IMGDATA->m_maskBlue; + for ( unsigned char *src = M_IMGDATA->m_data; + alpha < alphaEnd; + src += 3, alpha++ ) + { + *alpha = (src[0] == mr && src[1] == mg && src[2] == mb) + ? wxIMAGE_ALPHA_TRANSPARENT + : wxIMAGE_ALPHA_OPAQUE; + } + + M_IMGDATA->m_hasMask = false; + } + else // no mask + { + // make the image fully opaque + memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha); + } +} + +// ---------------------------------------------------------------------------- +// mask support +// ---------------------------------------------------------------------------- + +void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + M_IMGDATA->m_maskRed = r; + M_IMGDATA->m_maskGreen = g; + M_IMGDATA->m_maskBlue = b; + M_IMGDATA->m_hasMask = true; +} + +bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const +{ + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + if (M_IMGDATA->m_hasMask) + { + if (r) *r = M_IMGDATA->m_maskRed; + if (g) *g = M_IMGDATA->m_maskGreen; + if (b) *b = M_IMGDATA->m_maskBlue; + return true; + } + else + { + FindFirstUnusedColour(r, g, b); + return false; + } +} + +unsigned char wxImage::GetMaskRed() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_maskRed; +} + +unsigned char wxImage::GetMaskGreen() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_maskGreen; +} + +unsigned char wxImage::GetMaskBlue() const +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return M_IMGDATA->m_maskBlue; +} + +void wxImage::SetMask( bool mask ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + AllocExclusive(); + + M_IMGDATA->m_hasMask = mask; +} + +bool wxImage::HasMask() const +{ + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + return M_IMGDATA->m_hasMask; +} + +bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const +{ + long pos = XYToIndex(x, y); + wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") ); + + // check mask + if ( M_IMGDATA->m_hasMask ) + { + const unsigned char *p = M_IMGDATA->m_data + 3*pos; + if ( p[0] == M_IMGDATA->m_maskRed && + p[1] == M_IMGDATA->m_maskGreen && + p[2] == M_IMGDATA->m_maskBlue ) + { + return true; + } + } + + // then check alpha + if ( M_IMGDATA->m_alpha ) + { + if ( M_IMGDATA->m_alpha[pos] < threshold ) + { + // transparent enough + return true; + } + } + + // not transparent + return false; +} + +bool wxImage::SetMaskFromImage(const wxImage& mask, + unsigned char mr, unsigned char mg, unsigned char mb) +{ + // check that the images are the same size + if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) ) + { + wxLogError( _("Image and mask have different sizes.") ); + return false; + } + + // find unused colour + unsigned char r,g,b ; + if (!FindFirstUnusedColour(&r, &g, &b)) + { + wxLogError( _("No unused colour in image being masked.") ); + return false ; + } + + AllocExclusive(); + + unsigned char *imgdata = GetData(); + unsigned char *maskdata = mask.GetData(); + + const int w = GetWidth(); + const int h = GetHeight(); + + for (int j = 0; j < h; j++) + { + for (int i = 0; i < w; i++) + { + if ((maskdata[0] == mr) && (maskdata[1] == mg) && (maskdata[2] == mb)) + { + imgdata[0] = r; + imgdata[1] = g; + imgdata[2] = b; + } + imgdata += 3; + maskdata += 3; + } + } + + SetMaskColour(r, g, b); + SetMask(true); + + return true; +} + +bool wxImage::ConvertAlphaToMask(unsigned char threshold) +{ + if (!HasAlpha()) + return true; + + unsigned char mr, mg, mb; + if (!FindFirstUnusedColour(&mr, &mg, &mb)) + { + wxLogError( _("No unused colour in image being masked.") ); + return false; + } + + AllocExclusive(); + + SetMask(true); + SetMaskColour(mr, mg, mb); + + unsigned char *imgdata = GetData(); + unsigned char *alphadata = GetAlpha(); + + int w = GetWidth(); + int h = GetHeight(); + + for (int y = 0; y < h; y++) + { + for (int x = 0; x < w; x++, imgdata += 3, alphadata++) + { + if (*alphadata < threshold) + { + imgdata[0] = mr; + imgdata[1] = mg; + imgdata[2] = mb; + } + } + } + + free(M_IMGDATA->m_alpha); + M_IMGDATA->m_alpha = NULL; + + return true; +} + +// ---------------------------------------------------------------------------- +// Palette functions +// ---------------------------------------------------------------------------- + +#if wxUSE_PALETTE + +bool wxImage::HasPalette() const +{ + if (!Ok()) + return false; + + return M_IMGDATA->m_palette.Ok(); +} + +const wxPalette& wxImage::GetPalette() const +{ + wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") ); + + return M_IMGDATA->m_palette; +} + +void wxImage::SetPalette(const wxPalette& palette) +{ + wxCHECK_RET( Ok(), 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) + { + M_IMGDATA->m_optionNames.Add(name); + M_IMGDATA->m_optionValues.Add(value); + } + else + { + M_IMGDATA->m_optionNames[idx] = name; + M_IMGDATA->m_optionValues[idx] = value; + } +} + +void wxImage::SetOption(const wxString& name, int value) +{ + wxString valStr; + valStr.Printf(wxT("%d"), value); + SetOption(name, valStr); +} + +wxString wxImage::GetOption(const wxString& name) const +{ + wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") ); + + int idx = M_IMGDATA->m_optionNames.Index(name, false); + if (idx == wxNOT_FOUND) + return wxEmptyString; + else + return M_IMGDATA->m_optionValues[idx]; +} + +int wxImage::GetOptionInt(const wxString& name) const +{ + 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); +} + +// ---------------------------------------------------------------------------- +// image I/O +// ---------------------------------------------------------------------------- + +bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + long WXUNUSED_UNLESS_STREAMS(type), + int WXUNUSED_UNLESS_STREAMS(index) ) +{ +#if wxUSE_STREAMS + if (wxFileExists(filename)) + { + wxFileInputStream stream(filename); + wxBufferedInputStream bstream( stream ); + return LoadFile(bstream, type, index); + } + else + { + wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); + + return false; + } +#else // !wxUSE_STREAMS + return false; +#endif // wxUSE_STREAMS +} + +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)) + { + wxFileInputStream stream(filename); + wxBufferedInputStream bstream( stream ); + return LoadFile(bstream, mimetype, index); + } + else + { + wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); + + return false; + } +#else // !wxUSE_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) + { + SaveFile(filename, pHandler->GetType()); + return true; + } + + wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str()); + + return false; +} + +bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + int WXUNUSED_UNLESS_STREAMS(type) ) const +{ +#if wxUSE_STREAMS + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); + + wxFileOutputStream stream(filename); + + if ( stream.IsOk() ) + { + wxBufferedOutputStream bstream( stream ); + return SaveFile(bstream, type); + } +#endif // wxUSE_STREAMS + + return false; +} + +bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), + const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const +{ +#if wxUSE_STREAMS + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); + + wxFileOutputStream stream(filename); + + if ( stream.IsOk() ) + { + wxBufferedOutputStream bstream( stream ); + return SaveFile(bstream, mimetype); + } +#endif // wxUSE_STREAMS + + return false; +} + +bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) ) +{ +#if wxUSE_STREAMS + wxFileInputStream stream(name); + return CanRead(stream); +#else + return false; +#endif +} + +int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name), + long WXUNUSED_UNLESS_STREAMS(type) ) +{ +#if wxUSE_STREAMS + wxFileInputStream stream(name); + if (stream.Ok()) + return GetImageCount(stream, type); +#endif + + return 0; +} + +#if wxUSE_STREAMS + +bool wxImage::CanRead( wxInputStream &stream ) +{ + const wxList& list = GetHandlers(); + + for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) + { + wxImageHandler *handler=(wxImageHandler*)node->GetData(); + if (handler->CanRead( stream )) + return true; + } + + return false; +} + +int wxImage::GetImageCount( wxInputStream &stream, long type ) +{ + wxImageHandler *handler; + + if ( type == wxBITMAP_TYPE_ANY ) + { + wxList &list=GetHandlers(); + + for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext()) + { + handler=(wxImageHandler*)node->GetData(); + if ( handler->CanRead(stream) ) + return handler->GetImageCount(stream); + + } + + wxLogWarning(_("No handler found for image type.")); + return 0; + } + + handler = FindHandler(type); + + if ( !handler ) + { + wxLogWarning(_("No image handler for type %d defined."), type); + return false; + } + + if ( handler->CanRead(stream) ) + { + return handler->GetImageCount(stream); + } + else + { + wxLogError(_("Image file is not of type %d."), type); + return 0; + } +} + +bool wxImage::LoadFile( wxInputStream& stream, long type, int index ) +{ + UnRef(); + + m_refData = new wxImageRefData; + + wxImageHandler *handler; + + if ( type == wxBITMAP_TYPE_ANY ) + { + wxList &list=GetHandlers(); + + for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) + { + handler=(wxImageHandler*)node->GetData(); + if ( handler->CanRead(stream) ) + return handler->LoadFile(this, stream, true/*verbose*/, index); + + } + + wxLogWarning( _("No handler found for image type.") ); + return false; + } + + handler = FindHandler(type); + + if (handler == 0) + { + wxLogWarning( _("No image handler for type %d defined."), type ); + + return false; + } + + if (stream.IsSeekable() && !handler->CanRead(stream)) + { + wxLogError(_("Image file is not of type %d."), type); + return false; + } + else + return handler->LoadFile(this, stream, true/*verbose*/, index); +} + +bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index ) +{ + UnRef(); + + m_refData = new wxImageRefData; + + wxImageHandler *handler = FindHandlerMime(mimetype); + + if (handler == 0) + { + wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); + + return false; + } + + if (stream.IsSeekable() && !handler->CanRead(stream)) + { + wxLogError(_("Image file is not of type %s."), (const wxChar*) mimetype); + return false; + } + else + return handler->LoadFile( this, stream, true/*verbose*/, index ); +} + +bool wxImage::SaveFile( wxOutputStream& stream, int type ) const +{ + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + wxImageHandler *handler = FindHandler(type); + if ( !handler ) + { + wxLogWarning( _("No image handler for type %d defined."), type ); + + return false; + } + + return handler->SaveFile( (wxImage*)this, stream ); +} + +bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const +{ + wxCHECK_MSG( Ok(), false, wxT("invalid image") ); + + wxImageHandler *handler = FindHandlerMime(mimetype); + if ( !handler ) + { + wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); + + return false; + } + + return handler->SaveFile( (wxImage*)this, stream ); +} +#endif // wxUSE_STREAMS + +// ---------------------------------------------------------------------------- +// image I/O handlers +// ---------------------------------------------------------------------------- + +void wxImage::AddHandler( wxImageHandler *handler ) +{ + // Check for an existing handler of the type being added. + if (FindHandler( handler->GetType() ) == 0) + { + sm_handlers.Append( handler ); + } + else + { + // This is not documented behaviour, merely the simplest 'fix' + // for preventing duplicate additions. If someone ever has + // a good reason to add and remove duplicate handlers (and they + // may) we should probably refcount the duplicates. + // also an issue in InsertHandler below. + + wxLogDebug( _T("Adding duplicate image handler for '%s'"), + handler->GetName().c_str() ); + delete handler; + } +} + +void wxImage::InsertHandler( wxImageHandler *handler ) +{ + // Check for an existing handler of the type being added. + if (FindHandler( handler->GetType() ) == 0) + { + sm_handlers.Insert( handler ); + } + else + { + // see AddHandler for additional comments. + wxLogDebug( _T("Inserting duplicate image handler for '%s'"), + handler->GetName().c_str() ); + delete handler; + } +} + +bool wxImage::RemoveHandler( const wxString& name ) +{ + wxImageHandler *handler = FindHandler(name); + if (handler) + { + sm_handlers.DeleteObject(handler); + delete handler; + return true; + } + else + return false; +} + +wxImageHandler *wxImage::FindHandler( const wxString& name ) +{ + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) + { + wxImageHandler *handler = (wxImageHandler*)node->GetData(); + if (handler->GetName().Cmp(name) == 0) return handler; + + node = node->GetNext(); + } + return 0; +} + +wxImageHandler *wxImage::FindHandler( const wxString& extension, long 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; + node = node->GetNext(); + } + return 0; } -wxImage::wxImage( const wxBitmap &bitmap ) +wxImageHandler *wxImage::FindHandler( long bitmapType ) { - // check the bitmap - if( !bitmap.Ok() ) + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) { - wxFAIL_MSG( _T("invalid bitmap") ); - return; + wxImageHandler *handler = (wxImageHandler *)node->GetData(); + if (handler->GetType() == bitmapType) return handler; + node = node->GetNext(); } + return 0; +} - // create an wxImage object - int width = bitmap.GetWidth(); - int height = bitmap.GetHeight(); - Create( width, height ); - unsigned char *data = GetData(); - if( !data ) +wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) +{ + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) { - wxFAIL_MSG( _T("could not allocate data for image") ); - return; + wxImageHandler *handler = (wxImageHandler *)node->GetData(); + if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler; + node = node->GetNext(); } + return 0; +} + +void wxImage::InitStandardHandlers() +{ +#if wxUSE_STREAMS + AddHandler(new wxBMPHandler); +#endif // wxUSE_STREAMS +} - // calc the number of bytes per scanline and padding in the DIB - int bytePerLine = width*3; - int sizeDWORD = sizeof( DWORD ); - div_t lineBoundary = div( bytePerLine, sizeDWORD ); - int padding = 0; - if( lineBoundary.rem > 0 ) +void wxImage::CleanUpHandlers() +{ + wxList::compatibility_iterator node = sm_handlers.GetFirst(); + while (node) { - padding = sizeDWORD - lineBoundary.rem; - bytePerLine += padding; + wxImageHandler *handler = (wxImageHandler *)node->GetData(); + wxList::compatibility_iterator next = node->GetNext(); + delete handler; + node = next; } - // create a DIB header - int headersize = sizeof(BITMAPINFOHEADER); - LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); - if( !lpDIBh ) + sm_handlers.Clear(); +} + +wxString wxImage::GetImageExtWildcard() +{ + wxString fmts; + + wxList& Handlers = wxImage::GetHandlers(); + wxList::compatibility_iterator Node = Handlers.GetFirst(); + while ( Node ) { - wxFAIL_MSG( _T("could not allocate data for DIB header") ); - free( data ); - return; - } - // Fill in the DIB header - lpDIBh->bmiHeader.biSize = headersize; - lpDIBh->bmiHeader.biWidth = width; - lpDIBh->bmiHeader.biHeight = -height; - lpDIBh->bmiHeader.biSizeImage = bytePerLine * height; - lpDIBh->bmiHeader.biPlanes = 1; - lpDIBh->bmiHeader.biBitCount = 24; - lpDIBh->bmiHeader.biCompression = BI_RGB; - lpDIBh->bmiHeader.biClrUsed = 0; - // These seem not really needed for our purpose here. - lpDIBh->bmiHeader.biClrImportant = 0; - lpDIBh->bmiHeader.biXPelsPerMeter = 0; - lpDIBh->bmiHeader.biYPelsPerMeter = 0; - // memory for DIB data - unsigned char *lpBits; - lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage ); - if( !lpBits ) - { - wxFAIL_MSG( _T("could not allocate data for DIB") ); - free( data ); - free( lpDIBh ); - return; + wxImageHandler* Handler = (wxImageHandler*)Node->GetData(); + fmts += wxT("*.") + Handler->GetExtension(); + Node = Node->GetNext(); + if ( Node ) fmts += wxT(";"); } - // copy data from the device-dependent bitmap to the DIB - HDC hdc = ::GetDC(NULL); - HBITMAP hbitmap; - hbitmap = (HBITMAP) bitmap.GetHBITMAP(); - ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); + return wxT("(") + fmts + wxT(")|") + fmts; +} - // copy DIB data into the wxImage object - int i, j; - unsigned char *ptdata = data; - unsigned char *ptbits = lpBits; - for( i=0; i maximumRGB ) { - for( j=0; jGetMaskBitmap() ) - { - hbitmap = (HBITMAP) bitmap.GetMask()->GetMaskBitmap(); - // memory DC created, color set, data copied, and memory DC deleted - HDC memdc = ::CreateCompatibleDC( hdc ); - ::SetTextColor( memdc, RGB( 0, 0, 0 ) ); - ::SetBkColor( memdc, RGB( 255, 255, 255 ) ); - ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); - ::DeleteDC( memdc ); - // background color set to RGB(16,16,16) in consistent with wxGTK - unsigned char r=16, g=16, b=16; - ptdata = data; - ptbits = lpBits; - for( i=0; i maximumRGB ) { - SetMask( FALSE ); + chMax = BLUE; + maximumRGB = blue; } - // free allocated resources - ::ReleaseDC(NULL, hdc); - free(lpDIBh); - free(lpBits); -} - -#endif - -//----------------------------------------------------------------------------- -// GTK conversion routines -//----------------------------------------------------------------------------- - -#ifdef __WXGTK__ - -#include "gtk/gtk.h" -#include "gdk/gdk.h" -#include "gdk/gdkx.h" -#if (GTK_MINOR_VERSION > 0) -#include "gdk/gdkrgb.h" -#endif - -wxBitmap wxImage::ConvertToBitmap() const -{ - wxBitmap bitmap; + const double value = maximumRGB; - wxCHECK_MSG( Ok(), bitmap, _T("invalid image") ); + 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; - int width = GetWidth(); - int height = GetHeight(); + case GREEN: + hue = 2.0 + (blue - red) / deltaRGB; + break; - bitmap.SetHeight( height ); - bitmap.SetWidth( width ); + case BLUE: + hue = 4.0 + (red - green) / deltaRGB; + break; - bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) ); + default: + wxFAIL_MSG(wxT("hue not specified")); + break; + } - // Retrieve depth + hue /= 6.0; - GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() ); - if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent ); - int bpp = visual->depth; + if ( hue < 0.0 ) + hue += 1.0; - bitmap.SetDepth( bpp ); + saturation = deltaRGB / maximumRGB; + } - if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15; - if (bpp < 8) bpp = 8; + return HSVValue(hue, saturation, value); +} -#if (GTK_MINOR_VERSION > 0) +wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv) +{ + double red, green, blue; - if (!HasMask() && (bpp > 8)) + if ( wxIsNullDouble(hsv.saturation) ) { - static bool s_hasInitialized = FALSE; + // Grey + red = hsv.value; + green = hsv.value; + blue = hsv.value; + } + else // not grey + { + double hue = hsv.hue * 6.0; // sector 0 to 5 + int i = (int)floor(hue); + double f = hue - i; // fractional part of h + double p = hsv.value * (1.0 - hsv.saturation); - if (!s_hasInitialized) - { - gdk_rgb_init(); - s_hasInitialized = TRUE; - } + 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; + } + } - GdkGC *gc = gdk_gc_new( bitmap.GetPixmap() ); + return RGBValue((unsigned char)(red * 255.0), + (unsigned char)(green * 255.0), + (unsigned char)(blue * 255.0)); +} - gdk_draw_rgb_image( bitmap.GetPixmap(), - gc, - 0, 0, - width, height, - GDK_RGB_DITHER_NONE, - GetData(), - width*3 ); +/* + * Rotates the hue of each pixel of the image. angle is a double in the range + * -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees + */ +void wxImage::RotateHue(double angle) +{ + AllocExclusive(); - gdk_gc_unref( gc ); + unsigned char *srcBytePtr; + unsigned char *dstBytePtr; + unsigned long count; + wxImage::HSVValue hsv; + wxImage::RGBValue rgb; - return bitmap; + wxASSERT (angle >= -1.0 && angle <= 1.0); + count = M_IMGDATA->m_width * M_IMGDATA->m_height; + if ( count > 0 && !wxIsNullDouble(angle) ) + { + srcBytePtr = M_IMGDATA->m_data; + dstBytePtr = srcBytePtr; + do + { + rgb.red = *srcBytePtr++; + rgb.green = *srcBytePtr++; + rgb.blue = *srcBytePtr++; + hsv = RGBtoHSV(rgb); + + hsv.hue = hsv.hue + angle; + if (hsv.hue > 1.0) + hsv.hue = hsv.hue - 1.0; + else if (hsv.hue < 0.0) + hsv.hue = hsv.hue + 1.0; + + rgb = HSVtoRGB(hsv); + *dstBytePtr++ = rgb.red; + *dstBytePtr++ = rgb.green; + *dstBytePtr++ = rgb.blue; + } while (--count != 0); } +} -#endif +//----------------------------------------------------------------------------- +// wxImageHandler +//----------------------------------------------------------------------------- - // Create picture image +IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject) - GdkImage *data_image = - gdk_image_new( GDK_IMAGE_FASTEST, gdk_visual_get_system(), width, height ); +#if wxUSE_STREAMS +bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) ) +{ + return false; +} - // Create mask image +bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) +{ + return false; +} - GdkImage *mask_image = (GdkImage*) NULL; +int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) ) +{ + return 1; +} - if (HasMask()) +bool wxImageHandler::CanRead( const wxString& name ) +{ + if (wxFileExists(name)) { - unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height ); - - mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height ); - - wxMask *mask = new wxMask(); - mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 ); - - bitmap.SetMask( mask ); + wxFileInputStream stream(name); + return CanRead(stream); } - // Render + wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() ); - enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR }; - byte_order b_o = RGB; + return false; +} - if (bpp >= 24) +bool wxImageHandler::CallDoCanRead(wxInputStream& stream) +{ + wxFileOffset posOld = stream.TellI(); + if ( posOld == wxInvalidOffset ) { - GdkVisual *visual = gdk_visual_get_system(); - if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask)) b_o = RGB; - else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask)) b_o = RGB; - else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask)) b_o = BRG; - else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR; - else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask)) b_o = GRB; - else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask)) b_o = GBR; + // can't test unseekable stream + return false; } - int r_mask = GetMaskRed(); - int g_mask = GetMaskGreen(); - int b_mask = GetMaskBlue(); + bool ok = DoCanRead(stream); - unsigned char* data = GetData(); - - int index = 0; - for (int y = 0; y < height; y++) + // restore the old position to be able to test other formats and so on + if ( stream.SeekI(posOld) == wxInvalidOffset ) { - for (int x = 0; x < width; x++) - { - int r = data[index]; - index++; - int g = data[index]; - index++; - int b = data[index]; - index++; - - if (HasMask()) - { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); - } + wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!")); - if (HasMask()) - { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); - } + // reading would fail anyhow as we're not at the right position + return false; + } - switch (bpp) - { - case 8: - { - int pixel = -1; - if (wxTheApp->m_colorCube) - { - pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ]; - } - else - { - GdkColormap *cmap = gtk_widget_get_default_colormap(); - GdkColor *colors = cmap->colors; - int max = 3 * (65536); + return ok; +} - for (int i = 0; i < cmap->size; i++) - { - int rdiff = (r << 8) - colors[i].red; - int gdiff = (g << 8) - colors[i].green; - int bdiff = (b << 8) - colors[i].blue; - int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff); - if (sum < max) { pixel = i; max = sum; } - } - } +#endif // wxUSE_STREAMS - gdk_image_put_pixel( data_image, x, y, pixel ); +// ---------------------------------------------------------------------------- +// image histogram stuff +// ---------------------------------------------------------------------------- + +bool +wxImageHistogram::FindFirstUnusedColour(unsigned char *r, + unsigned char *g, + unsigned char *b, + unsigned char r2, + unsigned char b2, + unsigned char g2) const +{ + unsigned long key = MakeKey(r2, g2, b2); - break; - } - case 15: - { - guint32 pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); - gdk_image_put_pixel( data_image, x, y, pixel ); - break; - } - case 16: - { - guint32 pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); - gdk_image_put_pixel( data_image, x, y, pixel ); - break; - } - case 32: - case 24: + while ( find(key) != end() ) + { + // color already used + r2++; + if ( r2 >= 255 ) + { + r2 = 0; + g2++; + if ( g2 >= 255 ) + { + g2 = 0; + b2++; + if ( b2 >= 255 ) { - guint32 pixel = 0; - switch (b_o) - { - case RGB: pixel = (r << 16) | (g << 8) | b; break; - case RBG: pixel = (r << 16) | (b << 8) | g; break; - case BRG: pixel = (b << 16) | (r << 8) | g; break; - case BGR: pixel = (b << 16) | (g << 8) | r; break; - case GRB: pixel = (g << 16) | (r << 8) | b; break; - case GBR: pixel = (g << 16) | (b << 8) | r; break; - } - gdk_image_put_pixel( data_image, x, y, pixel ); + wxLogError(_("No unused colour in image.") ); + return false; } - default: break; } - } // for - } // for - - // Blit picture - - GdkGC *data_gc = gdk_gc_new( bitmap.GetPixmap() ); - - gdk_draw_image( bitmap.GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height ); - - gdk_image_destroy( data_image ); - gdk_gc_unref( data_gc ); - - // Blit mask - - if (HasMask()) - { - GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() ); - - gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height ); + } - gdk_image_destroy( mask_image ); - gdk_gc_unref( mask_gc ); + key = MakeKey(r2, g2, b2); } - return bitmap; + if ( r ) + *r = r2; + if ( g ) + *g = g2; + if ( b ) + *b = b2; + + return true; } -wxImage::wxImage( const wxBitmap &bitmap ) +bool +wxImage::FindFirstUnusedColour(unsigned char *r, + unsigned char *g, + unsigned char *b, + unsigned char r2, + unsigned char b2, + unsigned char g2) const { - wxCHECK_RET( bitmap.Ok(), _T("invalid bitmap") ); - - GdkImage *gdk_image = gdk_image_get( bitmap.GetPixmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight() ); - - wxCHECK_RET( gdk_image, _T("couldn't create image") ); + wxImageHistogram histogram; - Create( bitmap.GetWidth(), bitmap.GetHeight() ); - char unsigned *data = GetData(); + ComputeHistogram(histogram); - if (!data) - { - gdk_image_destroy( gdk_image ); - wxFAIL_MSG( _T("couldn't create image") ); - return; - } + return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2); +} - GdkImage *gdk_image_mask = (GdkImage*) NULL; - if (bitmap.GetMask()) - { - gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight() ); - SetMaskColour( 16, 16, 16 ); // anything unlikely and dividable - } - GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() ); - if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent ); - int bpp = visual->depth; - if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15; +// GRG, Dic/99 +// Counts and returns the number of different colours. Optionally stops +// when it exceeds 'stopafter' different colours. This is useful, for +// example, to see if the image can be saved as 8-bit (256 colour or +// less, in this case it would be invoked as CountColours(256)). Default +// value for stopafter is -1 (don't care). +// +unsigned long wxImage::CountColours( unsigned long stopafter ) const +{ + wxHashTable h; + wxObject dummy; + unsigned char r, g, b; + unsigned char *p; + unsigned long size, nentries, key; - GdkColormap *cmap = gtk_widget_get_default_colormap(); + p = GetData(); + size = GetWidth() * GetHeight(); + nentries = 0; - long pos = 0; - for (int j = 0; j < bitmap.GetHeight(); j++) + for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++) { - for (int i = 0; i < bitmap.GetWidth(); i++) - { - int pixel = gdk_image_get_pixel( gdk_image, i, j ); - if (bpp <= 8) - { - data[pos] = cmap->colors[pixel].red >> 8; - data[pos+1] = cmap->colors[pixel].green >> 8; - data[pos+2] = cmap->colors[pixel].blue >> 8; - } else if (bpp == 15) - { - data[pos] = (pixel >> 7) & 0xf8; - data[pos+1] = (pixel >> 2) & 0xf8; - data[pos+2] = (pixel << 3) & 0xf8; - } else if (bpp == 16) - { - data[pos] = (pixel >> 8) & 0xf8; - data[pos+1] = (pixel >> 3) & 0xfc; - data[pos+2] = (pixel << 3) & 0xf8; - } else - { - data[pos] = (pixel >> 16) & 0xff; - data[pos+1] = (pixel >> 8) & 0xff; - data[pos+2] = pixel & 0xff; - } - - if (gdk_image_mask) - { - int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j ); - if (mask_pixel == 0) - { - data[pos] = 16; - data[pos+1] = 16; - data[pos+2] = 16; - } - } + r = *(p++); + g = *(p++); + b = *(p++); + key = wxImageHistogram::MakeKey(r, g, b); - pos += 3; + if (h.Get(key) == NULL) + { + h.Put(key, &dummy); + nentries++; } } - gdk_image_destroy( gdk_image ); - if (gdk_image_mask) gdk_image_destroy( gdk_image_mask ); + return nentries; } -#endif - -//----------------------------------------------------------------------------- -// Motif conversion routines -//----------------------------------------------------------------------------- -#ifdef __WXMOTIF__ +unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const +{ + unsigned char *p = GetData(); + unsigned long nentries = 0; -#include -#include "wx/utils.h" -#include + h.clear(); -wxBitmap wxImage::ConvertToBitmap() const -{ - wxBitmap bitmap; + const unsigned long size = GetWidth() * GetHeight(); - wxCHECK_MSG( Ok(), bitmap, _T("invalid image") ); + unsigned char r, g, b; + for ( unsigned long n = 0; n < size; n++ ) + { + r = *p++; + g = *p++; + b = *p++; - int width = GetWidth(); - int height = GetHeight(); + wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)]; - bitmap.SetHeight( height ); - bitmap.SetWidth( width ); + if ( entry.value++ == 0 ) + entry.index = nentries++; + } - Display *dpy = (Display*) wxGetDisplay(); - Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) ); - int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) ); + return nentries; +} - // Create image +/* + * Rotation code by Carlos Moreno + */ - XImage *data_image = XCreateImage( dpy, vis, bpp, ZPixmap, 0, 0, width, height, 32, 0 ); - data_image->data = (char*) malloc( data_image->bytes_per_line * data_image->height ); +// 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. - bitmap.Create( width, height, bpp ); +static const double gs_Epsilon = 1e-10; - /* - // Create mask +static inline int wxCint (double x) +{ + return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5); +} - GdkImage *mask_image = (GdkImage*) NULL; - if (HasMask()) - { - unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height ); +// Auxiliary function to rotate a point (x,y) with respect to point p0 +// make it inline and use a straight return to facilitate optimization +// also, the function receives the sine and cosine of the angle to avoid +// repeating the time-consuming calls to these functions -- sin/cos can +// be computed and stored in the calling function. - mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height ); +inline wxRealPoint rotated_point (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); +} - wxMask *mask = new wxMask(); - mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 ); +inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0) +{ + return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0); +} - bitmap.SetMask( mask ); - } - */ +wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const +{ + int i; + angle = -angle; // screen coordinates are a mirror image of "real" coordinates - // Retrieve depth info + bool has_alpha = HasAlpha(); - XVisualInfo vinfo_template; - XVisualInfo *vi; + // Create pointer-based array to accelerate access to wxImage's data + unsigned char ** data = new unsigned char * [GetHeight()]; + data[0] = GetData(); + for (i = 1; i < GetHeight(); i++) + data[i] = data[i - 1] + (3 * GetWidth()); - vinfo_template.visual = vis; - vinfo_template.visualid = XVisualIDFromVisual( vis ); - vinfo_template.depth = bpp; - int nitem = 0; + // Same for alpha channel + unsigned char ** alpha = NULL; + if (has_alpha) + { + alpha = new unsigned char * [GetHeight()]; + alpha[0] = GetAlpha(); + for (i = 1; i < GetHeight(); i++) + alpha[i] = alpha[i - 1] + GetWidth(); + } - vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem ); + // precompute coefficients for rotation formula + // (sine and cosine of the angle) + const double cos_angle = cos(angle); + const double sin_angle = sin(angle); - wxCHECK_MSG( vi, wxNullBitmap, _T("no visual") ); + // Create new Image to store the result + // First, find rectangle that covers the rotated image; to do that, + // rotate the four corners - XFree( vi ); + const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y); - if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15; - if (bpp < 8) bpp = 8; + 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); - // Render + 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))); - enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR }; - byte_order b_o = RGB; + // Create rotated image + wxImage rotated (x2a - x1a + 1, y2a - y1a + 1, false); + // With alpha channel + if (has_alpha) + rotated.SetAlpha(); - if (bpp >= 24) + if (offset_after_rotation != NULL) { - if ((vi->red_mask > vi->green_mask) && (vi->green_mask > vi->blue_mask)) b_o = RGB; - else if ((vi->red_mask > vi->blue_mask) && (vi->blue_mask > vi->green_mask)) b_o = RGB; - else if ((vi->blue_mask > vi->red_mask) && (vi->red_mask > vi->green_mask)) b_o = BRG; - else if ((vi->blue_mask > vi->green_mask) && (vi->green_mask > vi->red_mask)) b_o = BGR; - else if ((vi->green_mask > vi->red_mask) && (vi->red_mask > vi->blue_mask)) b_o = GRB; - else if ((vi->green_mask > vi->blue_mask) && (vi->blue_mask > vi->red_mask)) b_o = GBR; + *offset_after_rotation = wxPoint (x1a, y1a); } - /* - int r_mask = GetMaskRed(); - int g_mask = GetMaskGreen(); - int b_mask = GetMaskBlue(); - */ + // 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(); - XColor colors[256]; - if (bpp == 8) - { - Colormap cmap = (Colormap) wxTheApp->GetMainColormap( dpy ); + unsigned char * alpha_dst = NULL; + if (has_alpha) + alpha_dst = rotated.GetAlpha(); + + // GRG: 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; - for (int i = 0; i < 256; i++) colors[i].pixel = i; - XQueryColors( dpy, cmap, colors, 256 ); + if (HasMask()) + { + blank_r = GetMaskRed(); + blank_g = GetMaskGreen(); + blank_b = GetMaskBlue(); + rotated.SetMaskColour( blank_r, blank_g, blank_b ); } - unsigned char* data = GetData(); + // Now, for each point of the rotated image, find where it came from, by + // performing an inverse rotation (a rotation of -angle) and getting the + // pixel at those coordinates - int index = 0; - for (int y = 0; y < height; y++) + // 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. + + int x; + if (interpolating) { - for (int x = 0; x < width; x++) + for (int y = 0; y < rotated.GetHeight(); y++) { - int r = data[index]; - index++; - int g = data[index]; - index++; - int b = data[index]; - index++; - - /* - if (HasMask()) + for (x = 0; x < rotated.GetWidth(); x++) { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); - } - */ + wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0); - switch (bpp) - { - case 8: + if (-0.25 < src.x && src.x < GetWidth() - 0.75 && + -0.25 < src.y && src.y < GetHeight() - 0.75) { - int pixel = -1; - /* - if (wxTheApp->m_colorCube) + // interpolate using the 4 enclosing grid-points. Those + // points can be obtained using floor and ceiling of the + // exact coordinates of the point + int x1, y1, x2, y2; + + if (0 < src.x && src.x < GetWidth() - 1) { - pixel = wxTheApp->m_colorCube - [ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ]; + x1 = wxCint(floor(src.x)); + x2 = wxCint(ceil(src.x)); } - else + else // else means that x is near one of the borders (0 or width-1) { - */ - int max = 3 * (65536); - for (int i = 0; i < 256; i++) - { - int rdiff = (r << 8) - colors[i].red; - int gdiff = (g << 8) - colors[i].green; - int bdiff = (b << 8) - colors[i].blue; - int sum = abs (rdiff) + abs (gdiff) + abs (bdiff); - if (sum < max) { pixel = i; max = sum; } + x1 = x2 = wxCint (src.x); } - /* + + if (0 < src.y && src.y < GetHeight() - 1) + { + y1 = wxCint(floor(src.y)); + y2 = wxCint(ceil(src.y)); } - */ - XPutPixel( data_image, x, y, pixel ); - break; - } - case 15: - { - int pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); - XPutPixel( data_image, x, y, pixel ); - break; - } - case 16: - { - int pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); - XPutPixel( data_image, x, y, pixel ); - break; - } - case 32: - case 24: - { - int pixel = 0; - switch (b_o) + else { - case RGB: pixel = (r << 16) | (g << 8) | b; break; - case RBG: pixel = (r << 16) | (b << 8) | g; break; - case BRG: pixel = (b << 16) | (r << 8) | g; break; - case BGR: pixel = (b << 16) | (g << 8) | r; break; - case GRB: pixel = (g << 16) | (r << 8) | b; break; - case GBR: pixel = (g << 16) | (b << 8) | r; break; + y1 = y2 = wxCint (src.y); } - XPutPixel( data_image, x, y, pixel ); - } - default: break; - } - } // for - } // for - // Blit picture + // get four points and the distances (square of the distance, + // for efficiency reasons) for the interpolation formula - XGCValues gcvalues; - gcvalues.foreground = BlackPixel( dpy, DefaultScreen( dpy ) ); - GC gc = XCreateGC( dpy, RootWindow ( dpy, DefaultScreen(dpy) ), GCForeground, &gcvalues ); - XPutImage( dpy, (Drawable)bitmap.GetPixmap(), gc, data_image, 0, 0, 0, 0, width, height ); + // 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 - XDestroyImage( data_image ); - XFreeGC( dpy, gc ); + const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1); + const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1); + const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2); + const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2); - /* - // Blit mask + // Now interpolate as a weighted average of the four surrounding + // points, where the weights are the distances to each of those points - if (HasMask()) - { - GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() ); - - gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height ); - - gdk_image_destroy( mask_image ); - gdk_gc_unref( mask_gc ); - } - */ - - return bitmap; -} + // If the point is exactly at one point of the grid of the source + // image, then don't interpolate -- just assign the pixel -wxImage::wxImage( const wxBitmap &bitmap ) -{ - wxCHECK_RET( bitmap.Ok(), _T("invalid bitmap") ); + if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs() + { + unsigned char *p = data[y1] + (3 * x1); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - Display *dpy = (Display*) wxGetDisplay(); - Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) ); - int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) ); + if (has_alpha) + *(alpha_dst++) = *(alpha[y1] + x1); + } + else if (d2 < gs_Epsilon) + { + unsigned char *p = data[y1] + (3 * x2); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - XImage *ximage = XGetImage( dpy, - (Drawable)bitmap.GetPixmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight(), - AllPlanes, ZPixmap ); + if (has_alpha) + *(alpha_dst++) = *(alpha[y1] + x2); + } + else if (d3 < gs_Epsilon) + { + unsigned char *p = data[y2] + (3 * x2); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - wxCHECK_RET( ximage, _T("couldn't create image") ); + if (has_alpha) + *(alpha_dst++) = *(alpha[y2] + x2); + } + else if (d4 < gs_Epsilon) + { + unsigned char *p = data[y2] + (3 * x1); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - Create( bitmap.GetWidth(), bitmap.GetHeight() ); - char unsigned *data = GetData(); + if (has_alpha) + *(alpha_dst++) = *(alpha[y2] + x1); + } + else + { + // weights for the weighted average are proportional to the inverse of the distance + unsigned char *v1 = data[y1] + (3 * x1); + unsigned char *v2 = data[y1] + (3 * x2); + unsigned char *v3 = data[y2] + (3 * x2); + unsigned char *v4 = data[y2] + (3 * x1); + + const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4; + + // GRG: Unrolled. + + *(dst++) = (unsigned char) + ( (w1 * *(v1++) + w2 * *(v2++) + + w3 * *(v3++) + w4 * *(v4++)) / + (w1 + w2 + w3 + w4) ); + *(dst++) = (unsigned char) + ( (w1 * *(v1++) + w2 * *(v2++) + + w3 * *(v3++) + w4 * *(v4++)) / + (w1 + w2 + w3 + w4) ); + *(dst++) = (unsigned char) + ( (w1 * *v1 + w2 * *v2 + + w3 * *v3 + w4 * *v4) / + (w1 + w2 + w3 + w4) ); + + if (has_alpha) + { + v1 = alpha[y1] + (x1); + v2 = alpha[y1] + (x2); + v3 = alpha[y2] + (x2); + v4 = alpha[y2] + (x1); + + *(alpha_dst++) = (unsigned char) + ( (w1 * *v1 + w2 * *v2 + + w3 * *v3 + w4 * *v4) / + (w1 + w2 + w3 + w4) ); + } + } + } + else + { + *(dst++) = blank_r; + *(dst++) = blank_g; + *(dst++) = blank_b; - if (!data) - { - XDestroyImage( ximage ); - wxFAIL_MSG( _T("couldn't create image") ); - return; + if (has_alpha) + *(alpha_dst++) = 0; + } + } + } } - - /* - GdkImage *gdk_image_mask = (GdkImage*) NULL; - if (bitmap.GetMask()) + else // not interpolating { - gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(), - 0, 0, - bitmap.GetWidth(), bitmap.GetHeight() ); - - SetMaskColour( 16, 16, 16 ); // anything unlikely and dividable - } - */ - - // Retrieve depth info - - XVisualInfo vinfo_template; - XVisualInfo *vi; + for (int y = 0; y < rotated.GetHeight(); y++) + { + for (x = 0; x < rotated.GetWidth(); x++) + { + wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0); - vinfo_template.visual = vis; - vinfo_template.visualid = XVisualIDFromVisual( vis ); - vinfo_template.depth = bpp; - int nitem = 0; + const int xs = wxCint (src.x); // wxCint rounds to the + const int ys = wxCint (src.y); // closest integer - vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem ); + if (0 <= xs && xs < GetWidth() && + 0 <= ys && ys < GetHeight()) + { + unsigned char *p = data[ys] + (3 * xs); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *p; - wxCHECK_RET( vi, _T("no visual") ); + if (has_alpha) + *(alpha_dst++) = *(alpha[ys] + (xs)); + } + else + { + *(dst++) = blank_r; + *(dst++) = blank_g; + *(dst++) = blank_b; - if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15; + if (has_alpha) + *(alpha_dst++) = 255; + } + } + } + } - XFree( vi ); + delete [] data; - XColor colors[256]; - if (bpp == 8) - { - Colormap cmap = (Colormap)wxTheApp->GetMainColormap( dpy ); + if (has_alpha) + delete [] alpha; - for (int i = 0; i < 256; i++) colors[i].pixel = i; - XQueryColors( dpy, cmap, colors, 256 ); - } + return rotated; +} - long pos = 0; - for (int j = 0; j < bitmap.GetHeight(); j++) - { - for (int i = 0; i < bitmap.GetWidth(); i++) - { - int pixel = XGetPixel( ximage, i, j ); - if (bpp <= 8) - { - data[pos] = colors[pixel].red >> 8; - data[pos+1] = colors[pixel].green >> 8; - data[pos+2] = colors[pixel].blue >> 8; - } else if (bpp == 15) - { - data[pos] = (pixel >> 7) & 0xf8; - data[pos+1] = (pixel >> 2) & 0xf8; - data[pos+2] = (pixel << 3) & 0xf8; - } else if (bpp == 16) - { - data[pos] = (pixel >> 8) & 0xf8; - data[pos+1] = (pixel >> 3) & 0xfc; - data[pos+2] = (pixel << 3) & 0xf8; - } else - { - data[pos] = (pixel >> 16) & 0xff; - data[pos+1] = (pixel >> 8) & 0xff; - data[pos+2] = pixel & 0xff; - } - /* - if (gdk_image_mask) - { - int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j ); - if (mask_pixel == 0) - { - data[pos] = 16; - data[pos+1] = 16; - data[pos+2] = 16; - } - } - */ - pos += 3; - } - } - XDestroyImage( ximage ); - /* - if (gdk_image_mask) gdk_image_destroy( gdk_image_mask ); - */ -} -#endif // A module to allow wxImage initialization/cleanup // without calling these functions from app.cpp or from @@ -1561,8 +2598,11 @@ class wxImageModule: public wxModule DECLARE_DYNAMIC_CLASS(wxImageModule) public: wxImageModule() {} - bool OnInit() { wxImage::InitStandardHandlers(); return TRUE; }; + bool OnInit() { wxImage::InitStandardHandlers(); return true; }; void OnExit() { wxImage::CleanUpHandlers(); }; }; IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule) + + +#endif // wxUSE_IMAGE