302 lines
8.0 KiB
C
302 lines
8.0 KiB
C
/*
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* Color functions
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*
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* Copyright 1993 Alexandre Julliard
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*/
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static char Copyright[] = "Copyright Alexandre Julliard, 1993";
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#include <stdlib.h>
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#include <X11/Xlib.h>
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#include "windows.h"
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#include "options.h"
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#include "gdi.h"
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Colormap COLOR_WinColormap = 0;
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/* System palette static colors */
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#define NB_RESERVED_COLORS 20
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/* The first and last eight colors are EGA colors */
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static PALETTEENTRY COLOR_sysPaletteEntries[NB_RESERVED_COLORS] =
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{
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/* red green blue flags */
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{ 0x00, 0x00, 0x00, 0 },
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{ 0x80, 0x00, 0x00, 0 },
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{ 0x00, 0x80, 0x00, 0 },
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{ 0x80, 0x80, 0x00, 0 },
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{ 0x00, 0x00, 0x80, 0 },
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{ 0x80, 0x00, 0x80, 0 },
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{ 0x00, 0x80, 0x80, 0 },
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{ 0xc0, 0xc0, 0xc0, 0 },
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{ 0xc0, 0xdc, 0xc0, 0 },
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{ 0xa6, 0xca, 0xf0, 0 },
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{ 0xff, 0xfb, 0xf0, 0 },
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{ 0xa0, 0xa0, 0xa4, 0 },
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{ 0x80, 0x80, 0x80, 0 },
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{ 0xff, 0x00, 0x00, 0 },
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{ 0x00, 0xff, 0x00, 0 },
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{ 0xff, 0xff, 0x00, 0 },
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{ 0x00, 0x00, 0xff, 0 },
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{ 0xff, 0x00, 0xff, 0 },
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{ 0x00, 0xff, 0xff, 0 },
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{ 0xff, 0xff, 0xff, 0 }
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};
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static HANDLE hSysColorTranslation = 0;
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/* Map an EGA index (0..15) to a pixel value. Used for dithering. */
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int COLOR_mapEGAPixel[16];
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/***********************************************************************
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* COLOR_BuildMap
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*
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* Fill the private colormap.
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*/
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static BOOL COLOR_BuildMap( Colormap map, int depth, int size )
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{
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XColor color;
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int r, g, b, red_incr, green_incr, blue_incr;
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int index = 0;
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/* Fill the whole map with a range of colors */
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blue_incr = 0x10000 >> (depth / 3);
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red_incr = 0x10000 >> ((depth + 1) / 3);
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green_incr = 0x10000 >> ((depth + 2) / 3);
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for (r = red_incr - 1; r < 0x10000; r += red_incr)
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for (g = green_incr - 1; g < 0x10000; g += green_incr)
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for (b = blue_incr - 1; b < 0x10000; b += blue_incr)
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{
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if (index >= size) break;
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color.pixel = index++;
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color.red = r;
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color.green = g;
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color.blue = b;
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XStoreColor( display, map, &color );
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}
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return TRUE;
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}
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/***********************************************************************
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* COLOR_InitPalette
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*
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* Create the system palette.
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*/
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static HPALETTE COLOR_InitPalette()
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{
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int i, size;
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XColor color;
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HPALETTE hpalette;
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LOGPALETTE * palPtr;
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WORD *colorTranslation;
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if (!(hSysColorTranslation = GDI_HEAP_ALLOC( GMEM_MOVEABLE,
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sizeof(WORD)*NB_RESERVED_COLORS ))) return FALSE;
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colorTranslation = (WORD *) GDI_HEAP_ADDR( hSysColorTranslation );
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size = DefaultVisual( display, DefaultScreen(display) )->map_entries;
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for (i = 0; i < NB_RESERVED_COLORS; i++)
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{
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color.red = COLOR_sysPaletteEntries[i].peRed * 65535 / 255;
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color.green = COLOR_sysPaletteEntries[i].peGreen * 65535 / 255;
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color.blue = COLOR_sysPaletteEntries[i].peBlue * 65535 / 255;
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color.flags = DoRed | DoGreen | DoBlue;
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if (COLOR_WinColormap != DefaultColormapOfScreen(screen))
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{
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if (i < NB_RESERVED_COLORS/2)
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{
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/* Bottom half of the colormap */
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color.pixel = i;
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if (color.pixel >= size/2) continue;
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}
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else
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{
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/* Top half of the colormap */
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color.pixel = size - NB_RESERVED_COLORS + i;
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if (color.pixel < size/2) continue;
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}
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XStoreColor( display, COLOR_WinColormap, &color );
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}
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else if (!XAllocColor( display, COLOR_WinColormap, &color ))
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{
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printf( "Warning: Not enough free colors. Try using the -privatemap option.\n" );
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color.pixel = color.red = color.green = color.blue = 0;
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}
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colorTranslation[i] = color.pixel;
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#if 0
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/* Put the allocated colors back in the list */
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COLOR_sysPaletteEntries[i].peRed = color.red >> 8;
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COLOR_sysPaletteEntries[i].peGreen = color.green >> 8;
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COLOR_sysPaletteEntries[i].peBlue = color.blue >> 8;
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#endif
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/* Set EGA mapping if color in the first or last eight */
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if (i < 8)
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COLOR_mapEGAPixel[i] = color.pixel;
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else if (i >= NB_RESERVED_COLORS-8)
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COLOR_mapEGAPixel[i - (NB_RESERVED_COLORS-16)] = color.pixel;
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}
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palPtr = malloc( sizeof(LOGPALETTE) + (NB_RESERVED_COLORS-1)*sizeof(PALETTEENTRY) );
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if (!palPtr) return FALSE;
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palPtr->palVersion = 0x300;
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palPtr->palNumEntries = NB_RESERVED_COLORS;
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memcpy( palPtr->palPalEntry, COLOR_sysPaletteEntries,
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sizeof(COLOR_sysPaletteEntries) );
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hpalette = CreatePalette( palPtr );
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free( palPtr );
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return hpalette;
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}
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/***********************************************************************
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* COLOR_Init
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*
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* Initialize color map and system palette.
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*/
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HPALETTE COLOR_Init()
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{
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Visual * visual = DefaultVisual( display, DefaultScreen(display) );
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switch(visual->class)
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{
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case GrayScale:
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case PseudoColor:
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case DirectColor:
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if (Options.usePrivateMap)
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{
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COLOR_WinColormap = XCreateColormap( display, rootWindow,
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visual, AllocAll );
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if (COLOR_WinColormap)
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{
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COLOR_BuildMap( COLOR_WinColormap, screenDepth,
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visual->map_entries );
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if (rootWindow != DefaultRootWindow(display))
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{
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XSetWindowAttributes win_attr;
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win_attr.colormap = COLOR_WinColormap;
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XChangeWindowAttributes( display, rootWindow,
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CWColormap, &win_attr );
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}
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break;
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}
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}
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/* Fall through */
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case StaticGray:
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case StaticColor:
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case TrueColor:
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COLOR_WinColormap = DefaultColormapOfScreen( screen );
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break;
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}
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return COLOR_InitPalette();
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}
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/***********************************************************************
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* COLOR_IsSolid
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*
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* Check whether 'color' can be represented with a solid color.
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*/
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BOOL COLOR_IsSolid( COLORREF color )
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{
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int i;
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PALETTEENTRY *pEntry = COLOR_sysPaletteEntries;
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if (color & 0xff000000) return TRUE;
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if (!color || (color == 0xffffff)) return TRUE;
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for (i = NB_RESERVED_COLORS; i > 0; i--, pEntry++)
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{
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if ((GetRValue(color) == pEntry->peRed) &&
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(GetGValue(color) == pEntry->peGreen) &&
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(GetBValue(color) == pEntry->peBlue)) return TRUE;
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}
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return FALSE;
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}
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/***********************************************************************
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* COLOR_ToPhysical
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*
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* Return the physical color closest to 'color'.
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*/
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WORD COLOR_ToPhysical( DC *dc, COLORREF color )
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{
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WORD index = 0;
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WORD *mapping;
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if (!dc->u.x.pal.hMapping) return 0;
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switch(color & 0xff000000)
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{
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case 0: /* RGB */
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index = GetNearestPaletteIndex( STOCK_DEFAULT_PALETTE, color );
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break;
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case 1: /* PALETTEINDEX */
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index = color & 0xffff;
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break;
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case 2: /* PALETTERGB */
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index = GetNearestPaletteIndex( dc->w.hPalette, color );
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break;
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}
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if (index >= dc->u.x.pal.mappingSize) return 0;
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mapping = (WORD *) GDI_HEAP_ADDR( dc->u.x.pal.hMapping );
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return mapping[index];
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}
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/***********************************************************************
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* COLOR_SetMapping
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*
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* Set the color-mapping table in a DC.
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*/
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void COLOR_SetMapping( DC *dc, HANDLE map, WORD size )
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{
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WORD *pmap, *pnewmap;
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if (dc->u.x.pal.hMapping && (dc->u.x.pal.hMapping != hSysColorTranslation))
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GDI_HEAP_FREE( dc->u.x.pal.hMapping );
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if (map && (map != hSysColorTranslation))
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{
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/* Copy mapping table */
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dc->u.x.pal.hMapping = GDI_HEAP_ALLOC(GMEM_MOVEABLE,sizeof(WORD)*size);
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pmap = (WORD *) GDI_HEAP_ADDR( map );
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pnewmap = (WORD *) GDI_HEAP_ADDR( dc->u.x.pal.hMapping );
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memcpy( pnewmap, pmap, sizeof(WORD)*size );
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}
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else dc->u.x.pal.hMapping = map;
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dc->u.x.pal.mappingSize = size;
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}
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/***********************************************************************
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* GetNearestColor (GDI.154)
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*/
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COLORREF GetNearestColor( HDC hdc, COLORREF color )
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{
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WORD index;
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DC *dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return 0;
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index = COLOR_ToPhysical( dc, color & 0xffffff );
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return PALETTEINDEX( index );
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}
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/***********************************************************************
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* RealizeDefaultPalette (GDI.365)
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*/
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WORD RealizeDefaultPalette( HDC hdc )
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{
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DC *dc;
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if (!(dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ))) return 0;
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dc->w.hPalette = STOCK_DEFAULT_PALETTE;
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COLOR_SetMapping( dc, hSysColorTranslation, NB_RESERVED_COLORS );
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return NB_RESERVED_COLORS;
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}
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