/* Copyright (c) Mark J. Kilgard, 1994, 1996, 1997. */ /* This program is freely distributable without licensing fees and is provided without guarantee or warrantee expressed or implied. This program is -not- in the public domain. */ #ifdef __VMS #include <GL/vms_x_fix.h> #endif #include <stdlib.h> #include <string.h> #include <stdio.h> /* SunOS multithreaded assert() needs <stdio.h>. Lame. */ #include <assert.h> #if !defined(_WIN32) #include <X11/Xlib.h> #include <X11/Xutil.h> #include <X11/Xatom.h> /* for XA_RGB_DEFAULT_MAP atom */ #if defined(__vms) #include <Xmu/StdCmap.h> /* for XmuLookupStandardColormap */ #else #include <X11/Xmu/StdCmap.h> /* for XmuLookupStandardColormap */ #endif #endif /* SGI optimization introduced in IRIX 6.3 to avoid X server round trips for interning common X atoms. */ #if defined(_SGI_EXTRA_PREDEFINES) && !defined(NO_FAST_ATOMS) #include <X11/SGIFastAtom.h> #else #define XSGIFastInternAtom(dpy,string,fast_name,how) XInternAtom(dpy,string,how) #endif #include "glutint.h" #include "layerutil.h" GLUTcolormap *__glutColormapList = NULL; GLUTcolormap * __glutAssociateNewColormap(XVisualInfo * vis) { GLUTcolormap *cmap; int transparentPixel, i; unsigned long pixels[255]; cmap = (GLUTcolormap *) malloc(sizeof(GLUTcolormap)); if (!cmap) __glutFatalError("out of memory."); #if defined(_WIN32) pixels[0] = 0; /* avoid compilation warnings on win32 */ cmap->visual = 0; cmap->size = 256; /* always assume 256 on Win32 */ #else cmap->visual = vis->visual; cmap->size = vis->visual->map_entries; #endif cmap->refcnt = 1; cmap->cells = (GLUTcolorcell *) malloc(sizeof(GLUTcolorcell) * cmap->size); if (!cmap->cells) __glutFatalError("out of memory."); /* make all color cell entries be invalid */ for (i = cmap->size - 1; i >= 0; i--) { cmap->cells[i].component[GLUT_RED] = -1.0; cmap->cells[i].component[GLUT_GREEN] = -1.0; cmap->cells[i].component[GLUT_BLUE] = -1.0; } transparentPixel = __glutGetTransparentPixel(__glutDisplay, vis); if (transparentPixel == -1 || transparentPixel >= cmap->size) { /* If there is no transparent pixel or if the transparent pixel is outside the range of valid colormap cells (HP can implement their overlays this smart way since their transparent pixel is 255), we can AllocAll the colormap. See note below. */ cmap->cmap = XCreateColormap(__glutDisplay, __glutRoot, cmap->visual, AllocAll); } else { /* On machines where zero (or some other value in the range of 0 through map_entries-1), BadAlloc may be generated when an AllocAll overlay colormap is allocated since the transparent pixel precludes all the cells in the colormap being allocated (the transparent pixel is pre-allocated). So in this case, use XAllocColorCells to allocate map_entries-1 pixels (that is, all but the transparent pixel. */ #if defined(_WIN32) cmap->cmap = XCreateColormap(__glutDisplay, __glutRoot, 0, AllocNone); #else cmap->cmap = XCreateColormap(__glutDisplay, __glutRoot, vis->visual, AllocNone); XAllocColorCells(__glutDisplay, cmap->cmap, False, 0, 0, pixels, cmap->size - 1); #endif } cmap->next = __glutColormapList; __glutColormapList = cmap; return cmap; } static GLUTcolormap * associateColormap(XVisualInfo * vis) { #if !defined(_WIN32) GLUTcolormap *cmap = __glutColormapList; while (cmap != NULL) { /* Play safe: compare visual IDs, not Visual*'s. */ if (cmap->visual->visualid == vis->visual->visualid) { /* Already have created colormap for the visual. */ cmap->refcnt++; return cmap; } cmap = cmap->next; } #endif return __glutAssociateNewColormap(vis); } void __glutSetupColormap(XVisualInfo * vi, GLUTcolormap ** colormap, Colormap * cmap) { #if defined(_WIN32) if (vi->dwFlags & PFD_NEED_PALETTE || vi->iPixelType == PFD_TYPE_COLORINDEX) { *colormap = associateColormap(vi); *cmap = (*colormap)->cmap; } else { *colormap = NULL; *cmap = 0; } #else Status status; XStandardColormap *standardCmaps; int i, numCmaps; static Atom hpColorRecoveryAtom = -1; int isRGB, visualClass, rc; #if defined(__cplusplus) || defined(c_plusplus) visualClass = vi->c_class; #else visualClass = vi->class; #endif switch (visualClass) { case PseudoColor: /* Mesa might return a PseudoColor visual for RGB mode. */ rc = glXGetConfig(__glutDisplay, vi, GLX_RGBA, &isRGB); if (rc == 0 && isRGB) { /* Must be Mesa. */ *colormap = NULL; if (MaxCmapsOfScreen(DefaultScreenOfDisplay(__glutDisplay)) == 1 && vi->visual == DefaultVisual(__glutDisplay, __glutScreen)) { char *privateCmap = getenv("MESA_PRIVATE_CMAP"); if (privateCmap) { /* User doesn't want to share colormaps. */ *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); } else { /* Share the root colormap. */ *cmap = DefaultColormap(__glutDisplay, __glutScreen); } } else { /* Get our own PseudoColor colormap. */ *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); } } else { /* CI mode, real GLX never returns a PseudoColor visual for RGB mode. */ *colormap = associateColormap(vi); *cmap = (*colormap)->cmap; } break; case TrueColor: *colormap = NULL; /* NULL if RGBA */ /* Hewlett-Packard supports a feature called "HP Color Recovery". Mesa has code to use HP Color Recovery. For Mesa to use this feature, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined on the root window AND the colormap obtainable by XGetRGBColormaps for that atom must be set on the window. If that colormap is not set, the output will look stripy. */ if (hpColorRecoveryAtom == -1) { char *xvendor; #define VENDOR_HP "Hewlett-Packard" /* Only makes sense to make XInternAtom round-trip if we know that we are connected to an HP X server. */ xvendor = ServerVendor(__glutDisplay); if (!strncmp(xvendor, VENDOR_HP, sizeof(VENDOR_HP) - 1)) { hpColorRecoveryAtom = XInternAtom(__glutDisplay, "_HP_RGB_SMOOTH_MAP_LIST", True); } else { hpColorRecoveryAtom = None; } } if (hpColorRecoveryAtom != None) { status = XGetRGBColormaps(__glutDisplay, __glutRoot, &standardCmaps, &numCmaps, hpColorRecoveryAtom); if (status == 1) { for (i = 0; i < numCmaps; i++) { if (standardCmaps[i].visualid == vi->visualid) { *cmap = standardCmaps[i].colormap; XFree(standardCmaps); return; } } XFree(standardCmaps); } } #ifndef SOLARIS_2_4_BUG /* Solaris 2.4 and 2.5 have a bug in their XmuLookupStandardColormap implementations. Please compile your Solaris 2.4 or 2.5 version of GLUT with -DSOLARIS_2_4_BUG to work around this bug. The symptom of the bug is that programs will get a BadMatch error from X_CreateWindow when creating a GLUT window because Solaris 2.4 and 2.5 create a corrupted RGB_DEFAULT_MAP property. Note that this workaround prevents Colormap sharing between applications, perhaps leading unnecessary colormap installations or colormap flashing. Sun fixed this bug in Solaris 2.6. */ status = XmuLookupStandardColormap(__glutDisplay, vi->screen, vi->visualid, vi->depth, XA_RGB_DEFAULT_MAP, /* replace */ False, /* retain */ True); if (status == 1) { status = XGetRGBColormaps(__glutDisplay, __glutRoot, &standardCmaps, &numCmaps, XA_RGB_DEFAULT_MAP); if (status == 1) { for (i = 0; i < numCmaps; i++) { if (standardCmaps[i].visualid == vi->visualid) { *cmap = standardCmaps[i].colormap; XFree(standardCmaps); return; } } XFree(standardCmaps); } } #endif /* If no standard colormap but TrueColor, just make a private one. */ /* XXX Should do a better job of internal sharing for privately allocated TrueColor colormaps. */ *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); break; case DirectColor: *colormap = NULL; /* NULL if RGBA */ *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocAll); if (vi->depth == 24) { /* init the red, green, blue maps to linear ramps */ XColor xc[256]; int i; for (i = 0; i < 256; i++) { xc[i].pixel = (i << 16) | (i << 8) | i; xc[i].red = (i << 8) | i; xc[i].green = (i << 8) | i; xc[i].blue = (i << 8) | i; xc[i].flags = DoRed | DoGreen | DoBlue; } XStoreColors(__glutDisplay, *cmap, xc, 256); } else { fprintf(stderr, "GLUT Error: DirectColor visuals other than 24-bits " "not fully supported.\n"); } break; case StaticColor: case StaticGray: case GrayScale: /* Mesa supports these visuals */ *colormap = NULL; *cmap = XCreateColormap(__glutDisplay, __glutRoot, vi->visual, AllocNone); break; default: __glutFatalError( "could not allocate colormap for visual type: %d.", visualClass); } return; #endif } #if !defined(_WIN32) static int findColormaps(GLUTwindow * window, Window * winlist, Colormap * cmaplist, int num, int max) { GLUTwindow *child; int i; /* Do not allow more entries that maximum number of colormaps! */ if (num >= max) return num; /* Is cmap for this window already on the list? */ for (i = 0; i < num; i++) { if (cmaplist[i] == window->cmap) goto normalColormapAlreadyListed; } /* Not found on the list; add colormap and window. */ winlist[num] = window->win; cmaplist[num] = window->cmap; num++; normalColormapAlreadyListed: /* Repeat above but for the overlay colormap if there one. */ if (window->overlay) { if (num >= max) return num; for (i = 0; i < num; i++) { if (cmaplist[i] == window->overlay->cmap) goto overlayColormapAlreadyListed; } winlist[num] = window->overlay->win; cmaplist[num] = window->overlay->cmap; num++; } overlayColormapAlreadyListed: /* Recursively search children. */ child = window->children; while (child) { num = findColormaps(child, winlist, cmaplist, num, max); child = child->siblings; } return num; } void __glutEstablishColormapsProperty(GLUTwindow * window) { /* this routine is strictly X. Win32 doesn't need to do anything of this sort (but has to do other wacky stuff later). */ static Atom wmColormapWindows = None; Window *winlist; Colormap *cmaplist; Status status; int maxcmaps, num, i; assert(!window->parent); maxcmaps = MaxCmapsOfScreen(ScreenOfDisplay(__glutDisplay, __glutScreen)); /* For portability reasons we don't use alloca for winlist and cmaplist, but we could. */ winlist = (Window *) malloc(maxcmaps * sizeof(Window)); cmaplist = (Colormap *) malloc(maxcmaps * sizeof(Colormap)); for (i = 0; i < maxcmaps; i++) { cmaplist[i] = 0; } num = findColormaps(window, winlist, cmaplist, 0, maxcmaps); if (num < 2) { /* Property no longer needed; remove it. */ wmColormapWindows = XSGIFastInternAtom(__glutDisplay, "WM_COLORMAP_WINDOWS", SGI_XA_WM_COLORMAP_WINDOWS, False); if (wmColormapWindows == None) { __glutWarning("Could not intern X atom for WM_COLORMAP_WINDOWS."); return; } XDeleteProperty(__glutDisplay, window->win, wmColormapWindows); } else { status = XSetWMColormapWindows(__glutDisplay, window->win, winlist, num); /* XSetWMColormapWindows should always work unless the WM_COLORMAP_WINDOWS property cannot be intern'ed. We check to be safe. */ if (status == False) __glutFatalError("XSetWMColormapWindows returned False."); } /* For portability reasons we don't use alloca for winlist and cmaplist, but we could. */ free(winlist); free(cmaplist); } GLUTwindow * __glutToplevelOf(GLUTwindow * window) { while (window->parent) { window = window->parent; } return window; } #endif void __glutFreeColormap(GLUTcolormap * cmap) { GLUTcolormap *cur, **prev; cmap->refcnt--; if (cmap->refcnt == 0) { /* remove from colormap list */ cur = __glutColormapList; prev = &__glutColormapList; while (cur) { if (cur == cmap) { *prev = cmap->next; break; } prev = &(cur->next); cur = cur->next; } /* actually free colormap */ XFreeColormap(__glutDisplay, cmap->cmap); free(cmap->cells); free(cmap); } }