X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/004fd0c8834ca526d335a9294322d9def17ef8a9..3bd380a3880d5138c8d5af1f3646466fe0f67b14:/src/common/image.cpp?ds=sidebyside diff --git a/src/common/image.cpp b/src/common/image.cpp index bb9f59afc4..9e4921bd87 100644 --- a/src/common/image.cpp +++ b/src/common/image.cpp @@ -30,6 +30,7 @@ // For memcpy #include +#include #ifdef __SALFORDC__ #undef FAR @@ -45,7 +46,6 @@ class wxImageRefData: public wxObjectRefData { - public: wxImageRefData(); ~wxImageRefData(); @@ -56,6 +56,10 @@ public: bool m_hasMask; unsigned char m_maskRed,m_maskGreen,m_maskBlue; bool m_ok; + bool m_static; + wxPalette m_palette; + wxArrayString m_optionNames; + wxArrayString m_optionValues; }; wxImageRefData::wxImageRefData() @@ -68,11 +72,13 @@ wxImageRefData::wxImageRefData() m_maskGreen = 0; m_maskBlue = 0; m_hasMask = FALSE; + m_static = FALSE; } wxImageRefData::~wxImageRefData() { - if (m_data) free( m_data ); + if (m_data && !m_static) + free( m_data ); } wxList wxImage::sm_handlers; @@ -81,9 +87,7 @@ wxList wxImage::sm_handlers; #define M_IMGDATA ((wxImageRefData *)m_refData) -#if !USE_SHARED_LIBRARIES - IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) -#endif +IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) wxImage::wxImage() { @@ -94,6 +98,11 @@ wxImage::wxImage( int width, int height ) Create( width, height ); } +wxImage::wxImage( int width, int height, unsigned char* data, bool static_data ) +{ + Create( width, height, data, static_data ); +} + wxImage::wxImage( const wxString& name, long type ) { LoadFile( name, type ); @@ -128,6 +137,8 @@ wxImage::wxImage( const wxImage* image ) void wxImage::Create( int width, int height ) { + UnRef(); + m_refData = new wxImageRefData(); M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 ); @@ -145,11 +156,51 @@ void wxImage::Create( int width, int height ) } } +void wxImage::Create( int width, int height, unsigned char* data, bool static_data ) +{ + UnRef(); + + m_refData = new wxImageRefData(); + + M_IMGDATA->m_data = data; + if (M_IMGDATA->m_data) + { + M_IMGDATA->m_width = width; + M_IMGDATA->m_height = height; + M_IMGDATA->m_ok = TRUE; + M_IMGDATA->m_static = static_data; + } + else + { + UnRef(); + } +} + void wxImage::Destroy() { UnRef(); } +wxImage wxImage::Copy() const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height ); + + char unsigned *data = image.GetData(); + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + if (M_IMGDATA->m_hasMask) + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + + memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 ); + + return image; +} + wxImage wxImage::Scale( int width, int height ) const { wxImage image; @@ -189,14 +240,99 @@ wxImage wxImage::Scale( int width, int height ) const return image; } +wxImage wxImage::Rotate90( bool clockwise ) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width ); + + char unsigned *data = image.GetData(); + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + if (M_IMGDATA->m_hasMask) + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; + + char unsigned *source_data = M_IMGDATA->m_data; + char unsigned *target_data; + + for (long j = 0; j < height; j++) + { + for (long i = 0; i < width; i++) + { + if (clockwise) + target_data = data + (((i+1)*height) - j - 1)*3; + else + target_data = data + ((height*(width-1)) + j - (i*height))*3; + memcpy( target_data, source_data, 3 ); + source_data += 3; + } + } + + return image; +} + +wxImage wxImage::Mirror( bool horizontally ) const +{ + wxImage image; + + wxCHECK_MSG( Ok(), image, wxT("invalid image") ); + + image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height ); + + char unsigned *data = image.GetData(); + + wxCHECK_MSG( data, image, wxT("unable to create image") ); + + if (M_IMGDATA->m_hasMask) + image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); + + long height = M_IMGDATA->m_height; + long width = M_IMGDATA->m_width; + + char unsigned *source_data = M_IMGDATA->m_data; + char unsigned *target_data; + + if (horizontally) + { + for (long j = 0; j < height; j++) + { + data += width*3; + target_data = data-3; + for (long i = 0; i < width; i++) + { + memcpy( target_data, source_data, 3 ); + source_data += 3; + target_data -= 3; + } + } + } + else + { + for (long i = 0; i < height; i++) + { + target_data = data + 3*width*(height-1-i); + memcpy( target_data, source_data, 3*width ); + source_data += 3*width; + } + } + + return image; +} + wxImage wxImage::GetSubImage( const wxRect &rect ) const { wxImage image; wxCHECK_MSG( Ok(), image, wxT("invalid image") ); - wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()) - , image, wxT("invalid subimage size") ); + wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), + image, wxT("invalid subimage size") ); int subwidth=rect.GetWidth(); const int subheight=rect.GetHeight(); @@ -226,6 +362,82 @@ wxImage wxImage::GetSubImage( const wxRect &rect ) const return image; } +void wxImage::Paste( const wxImage &image, int x, int y ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + wxCHECK_RET( image.Ok(), wxT("invalid image") ); + + 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() && + (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; + } + } + else + { + } +} + +void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1, + unsigned char r2, unsigned char g2, unsigned char b2 ) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + char unsigned *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::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) { wxCHECK_RET( Ok(), wxT("invalid image") ); @@ -242,7 +454,7 @@ void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned c M_IMGDATA->m_data[ pos+2 ] = b; } -unsigned char wxImage::GetRed( int x, int y ) +unsigned char wxImage::GetRed( int x, int y ) const { wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); @@ -256,7 +468,7 @@ unsigned char wxImage::GetRed( int x, int y ) return M_IMGDATA->m_data[pos]; } -unsigned char wxImage::GetGreen( int x, int y ) +unsigned char wxImage::GetGreen( int x, int y ) const { wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); @@ -270,7 +482,7 @@ unsigned char wxImage::GetGreen( int x, int y ) return M_IMGDATA->m_data[pos+1]; } -unsigned char wxImage::GetBlue( int x, int y ) +unsigned char wxImage::GetBlue( int x, int y ) const { wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); @@ -316,6 +528,34 @@ void wxImage::SetData( char unsigned *data ) m_refData = newRefData; } +void wxImage::SetData( char unsigned *data, int new_width, int new_height ) +{ + 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; + } + + UnRef(); + + m_refData = newRefData; +} + void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) { wxCHECK_RET( Ok(), wxT("invalid image") ); @@ -375,17 +615,92 @@ int wxImage::GetHeight() const return M_IMGDATA->m_height; } +// Palette functions + +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") ); + + M_IMGDATA->m_palette = palette; +} + +// Option functions (arbitrary name/value mapping) +void wxImage::SetOption(const wxString& name, const wxString& value) +{ + wxCHECK_RET( Ok(), wxT("invalid image") ); + + 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 +{ + wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); + + return wxAtoi(GetOption(name)); +} + +bool wxImage::HasOption(const wxString& name) const +{ + wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") ); + + return (M_IMGDATA->m_optionNames.Index(name, FALSE) != wxNOT_FOUND); +} + bool wxImage::LoadFile( const wxString& filename, long type ) { #if wxUSE_STREAMS if (wxFileExists(filename)) { wxFileInputStream stream(filename); - return LoadFile(stream, type); + wxBufferedInputStream bstream( stream ); + return LoadFile(bstream, type); } - - else { - wxLogError( wxT("Can't load image from file '%s': file does not exist."), filename.c_str() ); + else + { + wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); return FALSE; } @@ -400,11 +715,12 @@ bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype ) if (wxFileExists(filename)) { wxFileInputStream stream(filename); - return LoadFile(stream, mimetype); + wxBufferedInputStream bstream( stream ); + return LoadFile(bstream, mimetype); } - - else { - wxLogError( wxT("Can't load image from file '%s': file does not exist."), filename.c_str() ); + else + { + wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); return FALSE; } @@ -419,7 +735,10 @@ bool wxImage::SaveFile( const wxString& filename, int type ) wxFileOutputStream stream(filename); if ( stream.LastError() == wxStream_NOERROR ) - return SaveFile(stream, type); + { + wxBufferedOutputStream bstream( stream ); + return SaveFile(bstream, type); + } else #endif // wxUSE_STREAMS return FALSE; @@ -431,7 +750,10 @@ bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) wxFileOutputStream stream(filename); if ( stream.LastError() == wxStream_NOERROR ) - return SaveFile(stream, mimetype); + { + wxBufferedOutputStream bstream( stream ); + return SaveFile(bstream, mimetype); + } else #endif // wxUSE_STREAMS return FALSE; @@ -457,7 +779,7 @@ bool wxImage::CanRead( wxInputStream &stream ) { wxImageHandler *handler=(wxImageHandler*)node->GetData(); if (handler->CanRead( stream )) - return TRUE; + return TRUE; } return FALSE; @@ -483,7 +805,7 @@ bool wxImage::LoadFile( wxInputStream& stream, long type ) } - wxLogWarning( wxT("No handler found for this image.") ); + wxLogWarning( _("No handler found for image type.") ); return FALSE; } @@ -491,7 +813,7 @@ bool wxImage::LoadFile( wxInputStream& stream, long type ) if (handler == NULL) { - wxLogWarning( wxT("No image handler for type %d defined."), type ); + wxLogWarning( _("No image handler for type %d defined."), type ); return FALSE; } @@ -509,7 +831,7 @@ bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype ) if (handler == NULL) { - wxLogWarning( wxT("No image handler for type %s defined."), mimetype.GetData() ); + wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); return FALSE; } @@ -525,7 +847,7 @@ bool wxImage::SaveFile( wxOutputStream& stream, int type ) if (handler == NULL) { - wxLogWarning( wxT("No image handler for type %d defined."), type ); + wxLogWarning( _("No image handler for type %d defined."), type ); return FALSE; } @@ -541,7 +863,7 @@ bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) if (handler == NULL) { - wxLogWarning( wxT("No image handler for type %s defined."), mimetype.GetData() ); + wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); return FALSE; } @@ -651,12 +973,10 @@ void wxImage::CleanUpHandlers() // wxImageHandler //----------------------------------------------------------------------------- -#if !USE_SHARED_LIBRARIES IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject) -#endif #if wxUSE_STREAMS -bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) +bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) ) { return FALSE; } @@ -666,9 +986,13 @@ bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSE return FALSE; } +int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) ) +{ + return 1; +} + bool wxImageHandler::CanRead( const wxString& name ) { -#if wxUSE_STREAMS if (wxFileExists(name)) { wxFileInputStream stream(name); @@ -676,17 +1000,13 @@ bool wxImageHandler::CanRead( const wxString& name ) } else { - wxLogError( wxT("Can't check image format of file '%s': file does not exist."), name.c_str() ); + wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() ); return FALSE; } -#else // !wxUSE_STREAMS - return FALSE; -#endif // wxUSE_STREAMS +// return FALSE; } - - #endif // wxUSE_STREAMS //----------------------------------------------------------------------------- @@ -743,7 +1063,7 @@ wxBitmap wxImage::ConvertToBitmap() const // create a DIB header int headersize = sizeof(BITMAPINFOHEADER); - LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); + BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize ); wxCHECK_MSG( lpDIBh, bitmap, wxT("could not allocate memory for DIB header") ); // Fill in the DIB header lpDIBh->bmiHeader.biSize = headersize; @@ -777,6 +1097,13 @@ wxBitmap wxImage::ConvertToBitmap() const hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight ); ::SelectObject( memdc, hbitmap); + HPALETTE hOldPalette = 0; + if (GetPalette().Ok()) + { + hOldPalette = ::SelectPalette(memdc, (HPALETTE) GetPalette().GetHPALETTE(), FALSE); + ::RealizePalette(memdc); + } + // copy image data into DIB data and then into DDB (in a loop) unsigned char *data = GetData(); int i, j, n; @@ -826,11 +1153,14 @@ wxBitmap wxImage::ConvertToBitmap() const } bitmap.SetHBITMAP( (WXHBITMAP) hbitmap ); + if (hOldPalette) + SelectPalette(memdc, hOldPalette, FALSE); + // similarly, created an mono-bitmap for the possible mask if( HasMask() ) { hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL ); - ::SelectObject( memdc, hbitmap); + HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap); if( numDIB == 1 ) height = bmpHeight; else height = sizeLimit/bytePerLine; lpDIBh->bmiHeader.biHeight = (DWORD)(-height); @@ -856,7 +1186,12 @@ wxBitmap wxImage::ConvertToBitmap() const { for(i=0; iSetOk(); +#endif // WXWIN_COMPATIBILITY_2 return bitmap; } @@ -936,7 +1271,7 @@ wxImage::wxImage( const wxBitmap &bitmap ) // create a DIB header int headersize = sizeof(BITMAPINFOHEADER); - LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); + BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize ); if( !lpDIBh ) { wxFAIL_MSG( wxT("could not allocate data for DIB header") ); @@ -1034,46 +1369,361 @@ wxImage::wxImage( const wxBitmap &bitmap ) #endif -//----------------------------------------------------------------------------- -// GTK conversion routines -//----------------------------------------------------------------------------- - -#ifdef __WXGTK__ +#ifdef __WXMAC__ -#include "gtk/gtk.h" -#include "gdk/gdk.h" -#include "gdk/gdkx.h" +#include -#if (GTK_MINOR_VERSION > 0) -#include "gdk/gdkrgb.h" -#endif +extern CTabHandle wxMacCreateColorTable( int numColors ) ; +extern void wxMacDestroyColorTable( CTabHandle colors ) ; +extern void wxMacSetColorTableEntry( CTabHandle newColors , int index , int red , int green , int blue ) ; +extern GWorldPtr wxMacCreateGWorld( int height , int width , int depth ) ; +extern void wxMacDestroyGWorld( GWorldPtr gw ) ; wxBitmap wxImage::ConvertToBitmap() const { - wxBitmap bitmap; - - wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") ); - + // width and height of the device-dependent bitmap int width = GetWidth(); int height = GetHeight(); - bitmap.SetHeight( height ); - bitmap.SetWidth( width ); + // Create picture - bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) ); + wxBitmap bitmap( width , height , wxDisplayDepth() ) ; - // Retrieve depth - - GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() ); - if (visual == NULL) visual = gdk_visual_get_system(); - int bpp = visual->depth; + // Create mask - bitmap.SetDepth( bpp ); + if (HasMask()) + { + /* + unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height ); - if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15; - if (bpp < 8) bpp = 8; + mask_image = gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height ); -#if (GTK_MINOR_VERSION > 0) + wxMask *mask = new wxMask(); + mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 ); + + bitmap.SetMask( mask ); + */ + } + + // Render + + int r_mask = GetMaskRed(); + int g_mask = GetMaskGreen(); + int b_mask = GetMaskBlue(); + + CGrafPtr origPort ; + GDHandle origDevice ; + + GetGWorld( &origPort , &origDevice ) ; + SetGWorld( bitmap.GetHBITMAP() , NULL ) ; + + register unsigned char* data = GetData(); + + int index = 0; + for (int y = 0; y < height; y++) + { + for (int x = 0; x < width; x++) + { + unsigned char r = data[index++]; + unsigned char g = data[index++]; + unsigned char b = data[index++]; + RGBColor color ; + color.red = ( r << 8 ) + r ; + color.green = ( g << 8 ) + g ; + color.blue = ( b << 8 ) + b ; + SetCPixel( x , y , &color ) ; + } + } // for height + + SetGWorld( origPort , origDevice ) ; + + if ( HasMask() ) + { + wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue()); + wxMask *mask = new wxMask( bitmap, colour ); + bitmap.SetMask( mask ); + } + return bitmap; + +} + +wxImage::wxImage( const wxBitmap &bitmap ) +{ + // check the bitmap + if( !bitmap.Ok() ) + { + wxFAIL_MSG( "invalid bitmap" ); + return; + } + + // create an wxImage object + int width = bitmap.GetWidth(); + int height = bitmap.GetHeight(); + Create( width, height ); + /* + unsigned char *data = GetData(); + if( !data ) + { + wxFAIL_MSG( "could not allocate data for image" ); + return; + } + + // 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 ) + { + padding = sizeDWORD - lineBoundary.rem; + bytePerLine += padding; + } + + // create a DIB header + int headersize = sizeof(BITMAPINFOHEADER); + LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); + if( !lpDIBh ) + { + wxFAIL_MSG( "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( "could not allocate data for DIB" ); + free( data ); + free( lpDIBh ); + return; + } + + // 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 ); + + // copy DIB data into the wxImage object + int i, j; + unsigned char *ptdata = data; + unsigned char *ptbits = lpBits; + for( i=0; iGetMaskBitmap() ) + { + hbitmap = (HBITMAP) bitmap.GetMask()->GetMaskBitmap(); + // memory DC created, color set, data copied, and memory DC deleted + HDC memdc = ::CreateCompatibleDC( hdc ); + ::SetTextColor( memdc, RGB( 0, 0, 0 ) ); + ::SetBkColor( memdc, RGB( 255, 255, 255 ) ); + ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); + ::DeleteDC( memdc ); + // background color set to RGB(16,16,16) in consistent with wxGTK + unsigned char r=16, g=16, b=16; + ptdata = data; + ptbits = lpBits; + for( i=0; i +#include +#include + +#if (GTK_MINOR_VERSION > 0) +#include +#endif + +extern GtkWidget *wxRootWindow; + +wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) +{ + wxBitmap bitmap; + + wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") ); + + int width = GetWidth(); + int height = GetHeight(); + + bitmap.SetHeight( height ); + bitmap.SetWidth( width ); + + bitmap.SetBitmap( gdk_pixmap_new( wxRootWindow->window, width, height, 1 ) ); + + bitmap.SetDepth( 1 ); + + GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window ); + wxASSERT( visual ); + + // Create picture image + + unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height ); + + GdkImage *data_image = + gdk_image_new_bitmap( visual, data_data, width, height ); + + // Create mask image + + GdkImage *mask_image = (GdkImage*) NULL; + + if (HasMask()) + { + unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height ); + + mask_image = gdk_image_new_bitmap( visual, mask_data, width, height ); + + wxMask *mask = new wxMask(); + mask->m_bitmap = gdk_pixmap_new( wxRootWindow->window, width, height, 1 ); + + bitmap.SetMask( mask ); + } + + int r_mask = GetMaskRed(); + int g_mask = GetMaskGreen(); + int b_mask = GetMaskBlue(); + + unsigned char* data = GetData(); + + int index = 0; + for (int y = 0; y < height; y++) + { + for (int x = 0; x < width; x++) + { + int r = data[index]; + index++; + int g = data[index]; + index++; + int b = data[index]; + index++; + + if (HasMask()) + { + if ((r == r_mask) && (b == b_mask) && (g == g_mask)) + gdk_image_put_pixel( mask_image, x, y, 1 ); + else + gdk_image_put_pixel( mask_image, x, y, 0 ); + } + + if ((r == red) && (b == blue) && (g == green)) + gdk_image_put_pixel( data_image, x, y, 1 ); + else + gdk_image_put_pixel( data_image, x, y, 0 ); + + } // for + } // for + + // Blit picture + + GdkGC *data_gc = gdk_gc_new( bitmap.GetBitmap() ); + + gdk_draw_image( bitmap.GetBitmap(), 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 ); + } + + return bitmap; +} + + +wxBitmap wxImage::ConvertToBitmap() const +{ + wxBitmap bitmap; + + wxCHECK_MSG( Ok(), bitmap, wxT("invalid image") ); + + int width = GetWidth(); + int height = GetHeight(); + + bitmap.SetHeight( height ); + bitmap.SetWidth( width ); + + bitmap.SetPixmap( gdk_pixmap_new( wxRootWindow->window, width, height, -1 ) ); + + // Retrieve depth + + GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window ); + wxASSERT( visual ); + + int bpp = visual->depth; + + bitmap.SetDepth( bpp ); + + if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15; + if (bpp < 8) bpp = 8; + +#if (GTK_MINOR_VERSION > 0) if (!HasMask() && (bpp > 8)) { @@ -1105,7 +1755,7 @@ wxBitmap wxImage::ConvertToBitmap() const // Create picture image GdkImage *data_image = - gdk_image_new( GDK_IMAGE_FASTEST, gdk_visual_get_system(), width, height ); + gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height ); // Create mask image @@ -1115,10 +1765,10 @@ wxBitmap wxImage::ConvertToBitmap() const { 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 ); + mask_image = gdk_image_new_bitmap( visual, mask_data, width, height ); wxMask *mask = new wxMask(); - mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 ); + mask->m_bitmap = gdk_pixmap_new( wxRootWindow->window, width, height, 1 ); bitmap.SetMask( mask ); } @@ -1130,7 +1780,6 @@ wxBitmap wxImage::ConvertToBitmap() const if (bpp >= 24) { - 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; @@ -1165,14 +1814,6 @@ wxBitmap wxImage::ConvertToBitmap() const gdk_image_put_pixel( mask_image, x, y, 0 ); } - if (HasMask()) - { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); - } - switch (bpp) { case 8: @@ -1301,15 +1942,36 @@ wxImage::wxImage( const wxBitmap &bitmap ) SetMaskColour( 16, 16, 16 ); // anything unlikely and dividable } - GdkVisual *visual = (GdkVisual*) NULL; + int bpp = -1; + int red_shift_right = 0; + int green_shift_right = 0; + int blue_shift_right = 0; + int red_shift_left = 0; + int green_shift_left = 0; + int blue_shift_left = 0; + bool use_shift = FALSE; + if (bitmap.GetPixmap()) - visual = gdk_window_get_visual( bitmap.GetPixmap() ); - else - visual = gdk_window_get_visual( bitmap.GetBitmap() ); + { + GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() ); + + if (visual == NULL) visual = gdk_window_get_visual( wxRootWindow->window ); + bpp = visual->depth; + if (bpp == 16) bpp = visual->red_prec + visual->green_prec + visual->blue_prec; + red_shift_right = visual->red_shift; + red_shift_left = 8-visual->red_prec; + green_shift_right = visual->green_shift; + green_shift_left = 8-visual->green_prec; + blue_shift_right = visual->blue_shift; + blue_shift_left = 8-visual->blue_prec; + + use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR); + } + if (bitmap.GetBitmap()) + { + bpp = 1; + } - 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; GdkColormap *cmap = gtk_widget_get_default_colormap(); @@ -1318,28 +1980,37 @@ wxImage::wxImage( const wxBitmap &bitmap ) { for (int i = 0; i < bitmap.GetWidth(); i++) { - wxInt32 pixel = gdk_image_get_pixel( gdk_image, i, j ); - // pixel = wxINT32_SWAP_ON_BE( pixel ); - 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) + wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j ); + if (bpp == 1) + { + if (pixel == 0) + { + data[pos] = 0; + data[pos+1] = 0; + data[pos+2] = 0; + } + else + { + data[pos] = 255; + data[pos+1] = 255; + data[pos+2] = 255; + } + } + else if (use_shift) { - data[pos] = (pixel >> 7) & 0xf8; - data[pos+1] = (pixel >> 2) & 0xf8; - data[pos+2] = (pixel << 3) & 0xf8; - } else if (bpp == 16) + data[pos] = (pixel >> red_shift_right) << red_shift_left; + data[pos+1] = (pixel >> green_shift_right) << green_shift_left; + data[pos+2] = (pixel >> blue_shift_right) << blue_shift_left; + } + else if (cmap->colors) { - data[pos] = (pixel >> 8) & 0xf8; - data[pos+1] = (pixel >> 3) & 0xfc; - data[pos+2] = (pixel << 3) & 0xf8; - } else + data[pos] = cmap->colors[pixel].red >> 8; + data[pos+1] = cmap->colors[pixel].green >> 8; + data[pos+2] = cmap->colors[pixel].blue >> 8; + } + else { - data[pos] = (pixel >> 16) & 0xff; - data[pos+1] = (pixel >> 8) & 0xff; - data[pos+2] = pixel & 0xff; + wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") ); } if (gdk_image_mask) @@ -1368,11 +2039,189 @@ wxImage::wxImage( const wxBitmap &bitmap ) //----------------------------------------------------------------------------- #ifdef __WXMOTIF__ - +#ifdef __VMS__ +#pragma message disable nosimpint +#endif #include +#ifdef __VMS__ +#pragma message enable nosimpint +#endif #include "wx/utils.h" #include +/* + +Date: Wed, 05 Jan 2000 11:45:40 +0100 +From: Frits Boel +To: julian.smart@ukonline.co.uk +Subject: Patch for Motif ConvertToBitmap + +Hi Julian, + +I've been working on a wxWin application for image processing. From the +beginning, I was surprised by the (lack of) speed of ConvertToBitmap, +till I looked in the source code of image.cpp. I saw that converting a +wxImage to a bitmap with 8-bit pixels is done with comparing every pixel +to the 256 colors of the palet. A very time-consuming piece of code! + +Because I wanted a faster application, I've made a 'patch' for this. In +short: every pixel of the image is compared to a sorted list with +colors. If the color is found in the list, the palette entry is +returned; if the color is not found, the color palette is searched and +then the palette entry is returned and the color added to the sorted +list. + +Maybe there is another method for this, namely changing the palette +itself (if the colors are known, as is the case with tiffs with a +colormap). I did not look at this, maybe someone else did? + +The code of the patch is attached, have a look on it, and maybe you will +ship it with the next release of wxMotif? + +Regards, + +Frits Boel +Software engineer at Hubrecht Laboratory, The Netherlands. + +*/ + +class wxSearchColor +{ +public: + wxSearchColor( void ); + wxSearchColor( int size, XColor *colors ); + ~wxSearchColor( void ); + + int SearchColor( int r, int g, int b ); +private: + int AddColor( unsigned int value, int pos ); + + int size; + XColor *colors; + unsigned int *color; + int *entry; + + int bottom; + int top; +}; + +wxSearchColor::wxSearchColor( void ) +{ + size = 0; + colors = (XColor*) NULL; + color = (unsigned int *) NULL; + entry = (int*) NULL; + + bottom = 0; + top = 0; +} + +wxSearchColor::wxSearchColor( int size_, XColor *colors_ ) +{ + int i; + size = size_; + colors = colors_; + color = new unsigned int[size]; + entry = new int [size]; + + for (i = 0; i < size; i++ ) { + entry[i] = -1; + } + + bottom = top = ( size >> 1 ); +} + +wxSearchColor::~wxSearchColor( void ) +{ + if ( color ) delete color; + if ( entry ) delete entry; +} + +int wxSearchColor::SearchColor( int r, int g, int b ) +{ + unsigned int value = ( ( ( r * 256 ) + g ) * 256 ) + b; + int begin = bottom; + int end = top; + int middle; + + while ( begin <= end ) { + + middle = ( begin + end ) >> 1; + + if ( value == color[middle] ) { + return( entry[middle] ); + } else if ( value < color[middle] ) { + end = middle - 1; + } else { + begin = middle + 1; + } + + } + + return AddColor( value, middle ); +} + +int wxSearchColor::AddColor( unsigned int value, int pos ) +{ + int i; + int pixel = -1; + int max = 3 * (65536); + for ( i = 0; i < 256; i++ ) { + int rdiff = ((value >> 8) & 0xFF00 ) - colors[i].red; + int gdiff = ((value ) & 0xFF00 ) - colors[i].green; + int bdiff = ((value << 8) & 0xFF00 ) - colors[i].blue; + int sum = abs (rdiff) + abs (gdiff) + abs (bdiff); + if (sum < max) { pixel = i; max = sum; } + } + + if ( entry[pos] < 0 ) { + color[pos] = value; + entry[pos] = pixel; + } else if ( value < color[pos] ) { + + if ( bottom > 0 ) { + for ( i = bottom; i < pos; i++ ) { + color[i-1] = color[i]; + entry[i-1] = entry[i]; + } + bottom--; + color[pos-1] = value; + entry[pos-1] = pixel; + } else if ( top < size-1 ) { + for ( i = top; i >= pos; i-- ) { + color[i+1] = color[i]; + entry[i+1] = entry[i]; + } + top++; + color[pos] = value; + entry[pos] = pixel; + } + + } else { + + if ( top < size-1 ) { + for ( i = top; i > pos; i-- ) { + color[i+1] = color[i]; + entry[i+1] = entry[i]; + } + top++; + color[pos+1] = value; + entry[pos+1] = pixel; + } else if ( bottom > 0 ) { + for ( i = bottom; i < pos; i++ ) { + color[i-1] = color[i]; + entry[i-1] = entry[i]; + } + bottom--; + color[pos] = value; + entry[pos] = pixel; + } + + } + + return( pixel ); +} + wxBitmap wxImage::ConvertToBitmap() const { wxBitmap bitmap; @@ -1396,23 +2245,14 @@ wxBitmap wxImage::ConvertToBitmap() const bitmap.Create( width, height, bpp ); - /* // Create mask - GdkImage *mask_image = (GdkImage*) NULL; - - if (HasMask()) - { - 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 ); - } - */ + XImage *mask_image = (XImage*) NULL; + if (HasMask()) + { + mask_image = XCreateImage( dpy, vis, 1, ZPixmap, 0, 0, width, height, 32, 0 ); + mask_image->data = (char*) malloc( mask_image->bytes_per_line * mask_image->height ); + } // Retrieve depth info @@ -1448,11 +2288,9 @@ wxBitmap wxImage::ConvertToBitmap() const else if ((vi->green_mask > vi->blue_mask) && (vi->blue_mask > vi->red_mask)) b_o = GBR; } - /* int r_mask = GetMaskRed(); int g_mask = GetMaskGreen(); int b_mask = GetMaskBlue(); - */ XColor colors[256]; if (bpp == 8) @@ -1463,8 +2301,11 @@ wxBitmap wxImage::ConvertToBitmap() const XQueryColors( dpy, cmap, colors, 256 ); } + wxSearchColor scolor( 256, colors ); unsigned char* data = GetData(); + bool hasMask = HasMask(); + int index = 0; for (int y = 0; y < height; y++) { @@ -1477,20 +2318,19 @@ wxBitmap wxImage::ConvertToBitmap() const int b = data[index]; index++; - /* - if (HasMask()) + if (hasMask) { - if ((r == r_mask) && (b == b_mask) && (g == g_mask)) - gdk_image_put_pixel( mask_image, x, y, 1 ); - else - gdk_image_put_pixel( mask_image, x, y, 0 ); + if ((r == r_mask) && (b == b_mask) && (g == g_mask)) + XPutPixel( mask_image, x, y, 0 ); + else + XPutPixel( mask_image, x, y, 1 ); } - */ switch (bpp) { case 8: { +#if 0 // Old, slower code int pixel = -1; /* if (wxTheApp->m_colorCube) @@ -1513,6 +2353,10 @@ wxBitmap wxImage::ConvertToBitmap() const /* } */ +#endif + + // And this is all to get the 'right' color... + int pixel = scolor.SearchColor( r, g, b ); XPutPixel( data_image, x, y, pixel ); break; } @@ -1558,19 +2402,24 @@ wxBitmap wxImage::ConvertToBitmap() const XDestroyImage( data_image ); XFreeGC( dpy, gc ); - /* // Blit mask + if (HasMask()) + { + wxBitmap maskBitmap(width, height, 1); - if (HasMask()) - { - GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() ); + GC gcMask = XCreateGC( dpy, (Pixmap) maskBitmap.GetPixmap(), (XtGCMask) 0, (XGCValues*)NULL ); + XPutImage( dpy, (Drawable)maskBitmap.GetPixmap(), gcMask, mask_image, 0, 0, 0, 0, width, height ); - gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height ); + XDestroyImage( mask_image ); + XFreeGC( dpy, gcMask ); - gdk_image_destroy( mask_image ); - gdk_gc_unref( mask_gc ); - } - */ + wxMask* mask = new wxMask; + mask->SetPixmap(maskBitmap.GetPixmap()); + + bitmap.SetMask(mask); + + maskBitmap.SetPixmapNull(); + } return bitmap; } @@ -2041,3 +2890,342 @@ public: }; IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule) + + +//----------------------------------------------------------------------------- + +// 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 ) +{ + wxHashTable h; + wxObject dummy; + unsigned char r, g, b, *p; + unsigned long size, nentries, key; + + p = GetData(); + size = GetWidth() * GetHeight(); + nentries = 0; + + for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++) + { + r = *(p++); + g = *(p++); + b = *(p++); + key = (r << 16) | (g << 8) | b; + + if (h.Get(key) == NULL) + { + h.Put(key, &dummy); + nentries++; + } + } + + return nentries; +} + + +// GRG, Dic/99 +// Computes the histogram of the image and fills a hash table, indexed +// with integer keys built as 0xRRGGBB, containing wxHNode objects. Each +// wxHNode contains an 'index' (useful to build a palette with the image +// colours) and a 'value', which is the number of pixels in the image with +// that colour. +// +unsigned long wxImage::ComputeHistogram( wxHashTable &h ) +{ + unsigned char r, g, b, *p; + unsigned long size, nentries, key; + wxHNode *hnode; + + p = GetData(); + size = GetWidth() * GetHeight(); + nentries = 0; + + for (unsigned long j = 0; j < size; j++) + { + r = *(p++); + g = *(p++); + b = *(p++); + key = (r << 16) | (g << 8) | b; + + hnode = (wxHNode *) h.Get(key); + + if (hnode) + hnode->value++; + else + { + hnode = new wxHNode(); + hnode->index = nentries++; + hnode->value = 1; + + h.Put(key, (wxObject *)hnode); + } + } + + return nentries; +} + +/* + * Rotation code by Carlos Moreno + */ + +// GRG: I've removed wxRotationPoint - we already have wxRealPoint which +// does exactly the same thing. And I also got rid of wxRotationPixel +// bacause of potential problems in architectures where alignment +// is an issue, so I had to rewrite parts of the code. + +static const double gs_Epsilon = 1e-10; + +static inline int wxCint (double x) +{ + return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5); +} + + +// 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. + +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); +} + +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); +} + +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 + + // 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()); + + // precompute coefficients for rotation formula + // (sine and cosine of the angle) + const double cos_angle = cos(angle); + const double sin_angle = sin(angle); + + // Create new Image to store the result + // First, find rectangle that covers the rotated image; to do that, + // rotate the four corners + + const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y); + + 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); + + int x1 = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x))); + int y1 = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y))); + int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x))); + int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y))); + + wxImage rotated (x2 - x1 + 1, y2 - y1 + 1); + + if (offset_after_rotation != NULL) + { + *offset_after_rotation = wxPoint (x1, y1); + } + + // 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(); + + // 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; + + if (HasMask()) + { + blank_r = GetMaskRed(); + blank_g = GetMaskGreen(); + blank_b = GetMaskBlue(); + rotated.SetMaskColour( blank_r, blank_g, blank_b ); + } + + // 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 + + // 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 y = 0; y < rotated.GetHeight(); y++) + { + for (x = 0; x < rotated.GetWidth(); x++) + { + wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0); + + if (-0.25 < src.x && src.x < GetWidth() - 0.75 && + -0.25 < src.y && src.y < GetHeight() - 0.75) + { + // interpolate using the 4 enclosing grid-points. Those + // points can be obtained using floor and ceiling of the + // exact coordinates of the point + // C.M. 2000-02-17: when the point is near the border, special care is required. + + int x1, y1, x2, y2; + + if (0 < src.x && src.x < GetWidth() - 1) + { + x1 = wxCint(floor(src.x)); + x2 = wxCint(ceil(src.x)); + } + else // else means that x is near one of the borders (0 or width-1) + { + x1 = x2 = wxCint (src.x); + } + + if (0 < src.y && src.y < GetHeight() - 1) + { + y1 = wxCint(floor(src.y)); + y2 = wxCint(ceil(src.y)); + } + else + { + y1 = y2 = wxCint (src.y); + } + + // get four points and the distances (square of the distance, + // for efficiency reasons) for the interpolation formula + + // 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 + + 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); + + // Now interpolate as a weighted average of the four surrounding + // points, where the weights are the distances to each of those points + + // If the point is exactly at one point of the grid of the source + // image, then don't interpolate -- just assign the pixel + + if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs() + { + unsigned char *p = data[y1] + (3 * x1); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *(p++); + } + else if (d2 < gs_Epsilon) + { + unsigned char *p = data[y1] + (3 * x2); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *(p++); + } + else if (d3 < gs_Epsilon) + { + unsigned char *p = data[y2] + (3 * x2); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *(p++); + } + else if (d4 < gs_Epsilon) + { + unsigned char *p = data[y2] + (3 * x1); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *(p++); + } + 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) ); + } + } + else + { + *(dst++) = blank_r; + *(dst++) = blank_g; + *(dst++) = blank_b; + } + } + } + } + else // not interpolating + { + for (int y = 0; y < rotated.GetHeight(); y++) + { + for (x = 0; x < rotated.GetWidth(); x++) + { + wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0); + + const int xs = wxCint (src.x); // wxCint rounds to the + const int ys = wxCint (src.y); // closest integer + + if (0 <= xs && xs < GetWidth() && + 0 <= ys && ys < GetHeight()) + { + unsigned char *p = data[ys] + (3 * xs); + *(dst++) = *(p++); + *(dst++) = *(p++); + *(dst++) = *(p++); + } + else + { + *(dst++) = blank_r; + *(dst++) = blank_g; + *(dst++) = blank_b; + } + } + } + } + + delete [] data; + + return rotated; +} +