Mercurial > sdl-ios-xcode
diff src/video/x11/SDL_x11window.c @ 3009:546c022a9ae5
Changed and hopefully fixed support for DirectColor with support for gammaramps.
author | Bob Pendleton <bob@pendleton.com> |
---|---|
date | Fri, 09 Jan 2009 20:39:33 +0000 |
parents | 502adab079a4 |
children | b36579172f27 |
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--- a/src/video/x11/SDL_x11window.c Fri Jan 09 15:41:45 2009 +0000 +++ b/src/video/x11/SDL_x11window.c Fri Jan 09 20:39:33 2009 +0000 @@ -28,6 +28,7 @@ #include "SDL_x11video.h" #include "SDL_x11mouse.h" +#include "SDL_x11gamma.h" #include "../Xext/extensions/StdCmap.h" static void @@ -213,6 +214,7 @@ xattr.border_pixel = 0; if (visual->class == PseudoColor) { +/* printf("asking for PseudoColor\n"); */ int nmaps; XStandardColormap cmap; XStandardColormap *stdmaps; @@ -293,18 +295,116 @@ displaydata->screen), visual, AllocAll); XStoreColors(data->display, colormap, colorcells, ncolors); - SDL_free(colorcells); xattr.colormap = colormap; X11_TrackColormap(data->display, displaydata->screen, colormap, - &cmap, visual); + visual, colorcells); + SDL_free(colorcells); } } else if (visual->class == DirectColor) { - /* FIXME: Allocate a read-write colormap for gamma fading someday */ - xattr.colormap = - XCreateColormap(data->display, - RootWindow(data->display, displaydata->screen), - visual, AllocNone); + Status status; + XStandardColormap cmap; + XColor *colorcells; + Colormap colormap; + int i; + int ncolors; + int rmax, gmax, bmax; + int rmask, gmask, bmask; + int rshift, gshift, bshift; + + /* Is the colormap we need already registered in SDL? */ + if (colormap = + X11_LookupColormap(data->display, + displaydata->screen, visual->visualid)) { + xattr.colormap = colormap; +/* printf("found existing colormap\n"); */ + } else { + /* The colormap is not known to SDL so we will create it */ + colormap = XCreateColormap(data->display, + RootWindow(data->display, + displaydata->screen), + visual, AllocAll); +/* printf("colormap = %x\n", colormap); */ + + /* If we can't create a colormap, then we must die */ + if (!colormap) { + SDL_SetError + ("Couldn't create window: Could not create wriatable colormap"); + return -1; + } + + /* OK, we got a colormap, now fill it in as best as we can */ + + colorcells = SDL_malloc(visual->map_entries * sizeof(XColor)); + if (NULL == colorcells) { + SDL_SetError("out of memory in X11_CreateWindow"); + return -1; + } + ncolors = visual->map_entries; + rmax = 0xffff; + gmax = 0xffff; + bmax = 0xffff; + + rshift = 0; + rmask = visual->red_mask; + while (0 == (rmask & 1)) { + rshift++; + rmask >>= 1; + } + +/* printf("rmask = %4x rshift = %4d\n", rmask, rshift); */ + + gshift = 0; + gmask = visual->green_mask; + while (0 == (gmask & 1)) { + gshift++; + gmask >>= 1; + } + +/* printf("gmask = %4x gshift = %4d\n", gmask, gshift); */ + + bshift = 0; + bmask = visual->blue_mask; + while (0 == (bmask & 1)) { + bshift++; + bmask >>= 1; + } + +/* printf("bmask = %4x bshift = %4d\n", bmask, bshift); */ + + /* build the color table pixel values */ + for (i = 0; i < ncolors; i++) { + Uint32 red = (rmax * i) / (ncolors - 1); + Uint32 green = (gmax * i) / (ncolors - 1); + Uint32 blue = (bmax * i) / (ncolors - 1); + + Uint32 rbits = (rmask * i) / (ncolors - 1); + Uint32 gbits = (gmask * i) / (ncolors - 1); + Uint32 bbits = (bmask * i) / (ncolors - 1); + + Uint32 pix = + (rbits << rshift) | (gbits << gshift) | (bbits << bshift); + + colorcells[i].pixel = pix; + + colorcells[i].red = red; + colorcells[i].green = green; + colorcells[i].blue = blue; + + colorcells[i].flags = DoRed | DoGreen | DoBlue; +/* printf("%2d:%4x [%4x %4x %4x]\n", i, pix, red, green, blue); */ + + } + + status = + XStoreColors(data->display, colormap, colorcells, ncolors); + + xattr.colormap = colormap; + X11_TrackColormap(data->display, displaydata->screen, + colormap, visual, colorcells); + + SDL_free(colorcells); + } } else { xattr.colormap = XCreateColormap(data->display,