X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/58c837a4e67c0996134cc0947691dc09c5f26687..9453a61bd887cb6a9a5c08e80af2eba072516663:/src/common/image.cpp diff --git a/src/common/image.cpp b/src/common/image.cpp index 29e7087ea3..e9435b5a46 100644 --- a/src/common/image.cpp +++ b/src/common/image.cpp @@ -30,6 +30,7 @@ // For memcpy #include +#include #ifdef __SALFORDC__ #undef FAR @@ -71,7 +72,7 @@ wxImageRefData::wxImageRefData() wxImageRefData::~wxImageRefData() { - if (m_data) + if (m_data) free( m_data ); } @@ -81,9 +82,7 @@ wxList wxImage::sm_handlers; #define M_IMGDATA ((wxImageRefData *)m_refData) -#if !USE_SHARED_LIBRARIES IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) -#endif wxImage::wxImage() { @@ -226,6 +225,29 @@ wxImage wxImage::GetSubImage( const wxRect &rect ) const return image; } +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") ); @@ -381,9 +403,10 @@ bool wxImage::LoadFile( const wxString& filename, long type ) if (wxFileExists(filename)) { wxFileInputStream stream(filename); - return LoadFile(stream, type); + wxBufferedInputStream bstream( stream ); + return LoadFile(bstream, type); } - else + else { wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); @@ -400,9 +423,10 @@ 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 + else { wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); @@ -419,7 +443,10 @@ 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 +458,10 @@ 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 +487,7 @@ bool wxImage::CanRead( wxInputStream &stream ) { wxImageHandler *handler=(wxImageHandler*)node->GetData(); if (handler->CanRead( stream )) - return TRUE; + return TRUE; } return FALSE; @@ -651,9 +681,7 @@ 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), int WXUNUSED(index) ) @@ -684,7 +712,7 @@ bool wxImageHandler::CanRead( const wxString& name ) return FALSE; } - return FALSE; +// return FALSE; } #endif // wxUSE_STREAMS @@ -743,7 +771,7 @@ 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; @@ -830,7 +858,7 @@ wxBitmap wxImage::ConvertToBitmap() const 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 +884,12 @@ wxBitmap wxImage::ConvertToBitmap() const { for(i=0; i> 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 ); */ } - + // Render - + int r_mask = GetMaskRed(); int g_mask = GetMaskGreen(); int b_mask = GetMaskBlue(); - - CGrafPtr origPort ; - GDHandle origDevice ; - - GetGWorld( &origPort , &origDevice ) ; - SetGWorld( bitmap.GetHBITMAP() , NULL ) ; + + 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++) { -#if 0 - unsigned char lastr = 0 ; - unsigned char lastg = 0 ; - unsigned char lastb = 0 ; - RGBColor lastcolor ; - - MoveTo( 0 , y ) ; - for (int x = 0; x < width; x++) - { - unsigned char r = data[index++]; - unsigned char g = data[index++]; - unsigned char b = data[index++]; - - if ( r != lastr || g != lastg || b != lastb ) - { - lastcolor.red = ( lastr << 8 ) + lastr ; - lastcolor.green = ( lastg << 8 ) + lastg ; - lastcolor.blue = ( lastb << 8 ) + lastb ; - RGBForeColor( &lastcolor ) ; - LineTo( x , y ) ; - lastr = r ; - lastg = g ; - lastb = b ; - } - } // for width - lastcolor.red = ( lastr << 8 ) + lastr ; - lastcolor.green = ( lastg << 8 ) + lastg ; - lastcolor.blue = ( lastb << 8 ) + lastb ; - RGBForeColor( &lastcolor ) ; - LineTo( width - 1 , y ) ; -#else 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 ) ; - } -#endif + 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 ) ; - + 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 ) @@ -1145,11 +1153,11 @@ wxImage::wxImage( const wxBitmap &bitmap ) wxFAIL_MSG( "invalid bitmap" ); return; } - + // create an wxImage object int width = bitmap.GetWidth(); int height = bitmap.GetHeight(); - Create( width, height ); + Create( width, height ); /* unsigned char *data = GetData(); if( !data ) @@ -1157,18 +1165,18 @@ wxImage::wxImage( const wxBitmap &bitmap ) 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 ) + if( lineBoundary.rem > 0 ) { padding = sizeDWORD - lineBoundary.rem; bytePerLine += padding; } - + // create a DIB header int headersize = sizeof(BITMAPINFOHEADER); LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize ); @@ -1201,13 +1209,13 @@ wxImage::wxImage( const wxBitmap &bitmap ) 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; @@ -1222,8 +1230,8 @@ wxImage::wxImage( const wxBitmap &bitmap ) ptbits += 3; } ptbits += padding; - } - + } + // similarly, set data according to the possible mask bitmap if( bitmap.GetMask() && bitmap.GetMask()->GetMaskBitmap() ) { @@ -1233,9 +1241,9 @@ wxImage::wxImage( const wxBitmap &bitmap ) ::SetTextColor( memdc, RGB( 0, 0, 0 ) ); ::SetBkColor( memdc, RGB( 255, 255, 255 ) ); ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS ); - ::DeleteDC( memdc ); + ::DeleteDC( memdc ); // background color set to RGB(16,16,16) in consistent with wxGTK - unsigned char r=16, g=16, b=16; + unsigned char r=16, g=16, b=16; ptdata = data; ptbits = lpBits; for( i=0; i #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; @@ -1296,12 +1407,13 @@ wxBitmap wxImage::ConvertToBitmap() const bitmap.SetHeight( height ); bitmap.SetWidth( width ); - bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) ); + bitmap.SetPixmap( gdk_pixmap_new( wxRootWindow->window, width, height, -1 ) ); - // Retrieve depth + // Retrieve depth - GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() ); - if (visual == NULL) visual = gdk_visual_get_system(); + GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window ); + wxASSERT( visual ); + int bpp = visual->depth; bitmap.SetDepth( bpp ); @@ -1341,7 +1453,7 @@ 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 @@ -1351,10 +1463,10 @@ 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 ); } @@ -1366,7 +1478,6 @@ 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; @@ -1401,14 +1512,6 @@ 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: @@ -1537,16 +1640,37 @@ 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() ); - - 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; + { + 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; + } + GdkColormap *cmap = gtk_widget_get_default_colormap(); long pos = 0; @@ -1554,40 +1678,38 @@ wxImage::wxImage( const wxBitmap &bitmap ) { for (int i = 0; i < bitmap.GetWidth(); i++) { - wxInt32 pixel = gdk_image_get_pixel( gdk_image, i, j ); - if (bpp <= 8) + 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] = 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 >> 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) { -#if (wxBYTE_ORDER == wxBIG_ENDIAN) - // ? -#endif - data[pos] = (pixel >> 7) & 0xf8; - data[pos+1] = (pixel >> 2) & 0xf8; - data[pos+2] = (pixel << 3) & 0xf8; - } else if (bpp == 16) - { -#if (wxBYTE_ORDER == wxBIG_ENDIAN) - // ? -#endif - 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 { -#if (wxBYTE_ORDER == wxBIG_ENDIAN) - data[pos] = (pixel) & 0xff; // Red - data[pos+1] = (pixel >> 8) & 0xff; // Green - data[pos+2] = (pixel >> 16) & 0xff; // Blue -#else - data[pos] = (pixel >> 16) & 0xff; - data[pos+1] = (pixel >> 8) & 0xff; - data[pos+2] = pixel & 0xff; -#endif - } + wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") ); + } if (gdk_image_mask) { @@ -1625,6 +1747,179 @@ wxImage::wxImage( const wxBitmap &bitmap ) #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; @@ -1715,6 +2010,7 @@ wxBitmap wxImage::ConvertToBitmap() const XQueryColors( dpy, cmap, colors, 256 ); } + wxSearchColor scolor( 256, colors ); unsigned char* data = GetData(); int index = 0; @@ -1743,6 +2039,7 @@ wxBitmap wxImage::ConvertToBitmap() const { case 8: { +#if 0 // Old, slower code int pixel = -1; /* if (wxTheApp->m_colorCube) @@ -1765,6 +2062,10 @@ 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; } @@ -2293,3 +2594,287 @@ 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; + wxNode *node; + wxHNode *hnode; + 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; + + hnode = (wxHNode *) h.Get(key); + + if (!hnode) + { + h.Put(key, (wxObject *)(new wxHNode)); + nentries++; + } + } + + // delete all HNodes + h.BeginFind(); + while ((node = h.Next()) != NULL) + delete (wxHNode *)node->GetData(); + + 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 + */ + +struct wxRotationPixel +{ + unsigned char rgb[3]; +}; + +struct wxRotationPoint +{ + wxRotationPoint (double _x, double _y) : x(_x), y(_y) {} + wxRotationPoint (const wxPoint & p) : x(p.x), y(p.y) {} + double x, y; +}; + +static const wxRotationPixel gs_BlankPixel = {0,0,0}; +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 wxRotationPoint rotated_point (const wxRotationPoint & p, double cos_angle, double sin_angle, const wxRotationPoint & p0) +{ + return wxRotationPoint (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 wxRotationPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRotationPoint & p0) +{ + return rotated_point (wxRotationPoint(x,y), cos_angle, sin_angle, p0); +} + +wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const +{ + const wxImage& img = * this; + int i; + angle = -angle; // screen coordinates are a mirror image of "real" coordinates + + // Create pointer-based array to accelerate access to wxImage's data + wxRotationPixel ** data = new wxRotationPixel * [img.GetHeight()]; + + data[0] = (wxRotationPixel *) img.GetData(); + + for (i = 1; i < img.GetHeight(); i++) + { + data[i] = data[i - 1] + img.GetWidth(); + } + + // pre-compute 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 wxRotationPoint p0 = centre_of_rotation; + + wxRotationPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0); + wxRotationPoint p2 = rotated_point (0, img.GetHeight(), cos_angle, sin_angle, p0); + wxRotationPoint p3 = rotated_point (img.GetWidth(), 0, cos_angle, sin_angle, p0); + wxRotationPoint p4 = rotated_point (img.GetWidth(), img.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); + } + + + wxRotationPixel ** result_data = new wxRotationPixel * [rotated.GetHeight()]; + + result_data[0] = (wxRotationPixel *) rotated.GetData(); + + for (i = 1; i < rotated.GetHeight(); i++) + { + result_data[i] = result_data[i - 1] + rotated.GetWidth(); + } + + // 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 x; + for (x = 0; x < rotated.GetWidth(); x++) + { + for (int y = 0; y < rotated.GetHeight(); y++) + { + wxRotationPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0); + + if (interpolating) + { + if (0 < src.x && src.x < img.GetWidth() - 1 && + 0 < src.y && src.y < img.GetHeight() - 1) + { + // interpolate using the 4 enclosing grid-points. Those + // points can be obtained using floor and ceiling of the + // exact coordinates of the point + + const int x1 = wxCint(floor(src.x)); + const int y1 = wxCint(floor(src.y)); + const int x2 = wxCint(ceil(src.x)); + const int y2 = wxCint(ceil(src.y)); + + // get four points and the distances (square of the distance, + // for efficiency reasons) for the interpolation formula + const wxRotationPixel & v1 = data[y1][x1]; + const wxRotationPixel & v2 = data[y1][x2]; + const wxRotationPixel & v3 = data[y2][x2]; + const wxRotationPixel & v4 = data[y2][x1]; + + 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() + { + result_data[y][x] = v1; + } + else if (d2 < gs_Epsilon) + { + result_data[y][x] = v2; + } + else if (d3 < gs_Epsilon) + { + result_data[y][x] = v3; + } + else if (d4 < gs_Epsilon) + { + result_data[y][x] = v4; + } + else + { + // weights for the weighted average are proportional to the inverse of the distance + const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4; + + for (int i = 0; i < 3; i++) // repeat calculation for R, G, and B + { + result_data[y][x].rgb[i] = + (unsigned char) ( (w1 * v1.rgb[i] + w2 * v2.rgb[i] + + w3 * v3.rgb[i] + w4 * v4.rgb[i]) / + (w1 + w2 + w3 + w4) ); + } + } + } + else + { + result_data[y][x] = gs_BlankPixel; + } + } + else + { + const int xs = wxCint (src.x); // wxCint performs rounding to the + const int ys = wxCint (src.y); // closest integer + + if (0 <= xs && xs < img.GetWidth() && + 0 <= ys && ys < img.GetHeight()) + { + result_data[y][x] = data[ys][xs]; + } + else + { + result_data[y][x] = gs_BlankPixel; + } + } + } + } + + return rotated; +} +