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Diffstat (limited to 'src/glut/glx/glut_cindex.c')
-rw-r--r--src/glut/glx/glut_cindex.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/src/glut/glx/glut_cindex.c b/src/glut/glx/glut_cindex.c
new file mode 100644
index 000000000..d0c12bf3a
--- /dev/null
+++ b/src/glut/glx/glut_cindex.c
@@ -0,0 +1,252 @@
+
+/* 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. */
+
+#include <stdlib.h>
+#include "glutint.h"
+
+#define CLAMP(i) ((i) > 1.0 ? 1.0 : ((i) < 0.0 ? 0.0 : (i)))
+
+/* CENTRY */
+void GLUTAPIENTRY
+glutSetColor(int ndx, GLfloat red, GLfloat green, GLfloat blue)
+{
+ GLUTcolormap *cmap, *newcmap;
+ XVisualInfo *vis;
+ XColor color;
+ int i;
+
+ if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
+ cmap = __glutCurrentWindow->colormap;
+ vis = __glutCurrentWindow->vis;
+ } else {
+ cmap = __glutCurrentWindow->overlay->colormap;
+ vis = __glutCurrentWindow->overlay->vis;
+ if (ndx == __glutCurrentWindow->overlay->transparentPixel) {
+ __glutWarning(
+ "glutSetColor: cannot set color of overlay transparent index %d\n",
+ ndx);
+ return;
+ }
+ }
+
+ if (!cmap) {
+ __glutWarning("glutSetColor: current window is RGBA");
+ return;
+ }
+#if defined(_WIN32)
+ if (ndx >= 256 || /* always assume 256 colors on Win32 */
+#else
+ if (ndx >= vis->visual->map_entries ||
+#endif
+ ndx < 0) {
+ __glutWarning("glutSetColor: index %d out of range", ndx);
+ return;
+ }
+ if (cmap->refcnt > 1) {
+ newcmap = __glutAssociateNewColormap(vis);
+ cmap->refcnt--;
+ /* Wouldn't it be nice if XCopyColormapAndFree could be
+ told not to free the old colormap's entries! */
+ for (i = cmap->size - 1; i >= 0; i--) {
+ if (i == ndx) {
+ /* We are going to set this cell shortly! */
+ continue;
+ }
+ if (cmap->cells[i].component[GLUT_RED] >= 0.0) {
+ color.pixel = i;
+ newcmap->cells[i].component[GLUT_RED] =
+ cmap->cells[i].component[GLUT_RED];
+ color.red = (GLfloat) 0xffff *
+ cmap->cells[i].component[GLUT_RED];
+ newcmap->cells[i].component[GLUT_GREEN] =
+ cmap->cells[i].component[GLUT_GREEN];
+ color.green = (GLfloat) 0xffff *
+ cmap->cells[i].component[GLUT_GREEN];
+ newcmap->cells[i].component[GLUT_BLUE] =
+ cmap->cells[i].component[GLUT_BLUE];
+ color.blue = (GLfloat) 0xffff *
+ cmap->cells[i].component[GLUT_BLUE];
+ color.flags = DoRed | DoGreen | DoBlue;
+#if defined(_WIN32)
+ if (IsWindowVisible(__glutCurrentWindow->win)) {
+ XHDC = __glutCurrentWindow->hdc;
+ } else {
+ XHDC = 0;
+ }
+#endif
+ XStoreColor(__glutDisplay, newcmap->cmap, &color);
+ } else {
+ /* Leave unallocated entries unallocated. */
+ }
+ }
+ cmap = newcmap;
+ if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
+ __glutCurrentWindow->colormap = cmap;
+ __glutCurrentWindow->cmap = cmap->cmap;
+ } else {
+ __glutCurrentWindow->overlay->colormap = cmap;
+ __glutCurrentWindow->overlay->cmap = cmap->cmap;
+ }
+ XSetWindowColormap(__glutDisplay,
+ __glutCurrentWindow->renderWin, cmap->cmap);
+
+#if !defined(_WIN32)
+ {
+ GLUTwindow *toplevel;
+
+ toplevel = __glutToplevelOf(__glutCurrentWindow);
+ if (toplevel->cmap != cmap->cmap) {
+ __glutPutOnWorkList(toplevel, GLUT_COLORMAP_WORK);
+ }
+ }
+#endif
+ }
+ color.pixel = ndx;
+ red = CLAMP(red);
+ cmap->cells[ndx].component[GLUT_RED] = red;
+ color.red = (GLfloat) 0xffff *red;
+ green = CLAMP(green);
+ cmap->cells[ndx].component[GLUT_GREEN] = green;
+ color.green = (GLfloat) 0xffff *green;
+ blue = CLAMP(blue);
+ cmap->cells[ndx].component[GLUT_BLUE] = blue;
+ color.blue = (GLfloat) 0xffff *blue;
+ color.flags = DoRed | DoGreen | DoBlue;
+#if defined(_WIN32)
+ if (IsWindowVisible(__glutCurrentWindow->win)) {
+ XHDC = __glutCurrentWindow->hdc;
+ } else {
+ XHDC = 0;
+ }
+#endif
+ XStoreColor(__glutDisplay, cmap->cmap, &color);
+}
+
+GLfloat GLUTAPIENTRY
+glutGetColor(int ndx, int comp)
+{
+ GLUTcolormap *colormap;
+ XVisualInfo *vis;
+
+ if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
+ colormap = __glutCurrentWindow->colormap;
+ vis = __glutCurrentWindow->vis;
+ } else {
+ colormap = __glutCurrentWindow->overlay->colormap;
+ vis = __glutCurrentWindow->overlay->vis;
+ if (ndx == __glutCurrentWindow->overlay->transparentPixel) {
+ __glutWarning("glutGetColor: requesting overlay transparent index %d\n",
+ ndx);
+ return -1.0;
+ }
+ }
+
+ if (!colormap) {
+ __glutWarning("glutGetColor: current window is RGBA");
+ return -1.0;
+ }
+#if defined(_WIN32)
+#define OUT_OF_RANGE_NDX(ndx) (ndx >= 256 || ndx < 0)
+#else
+#define OUT_OF_RANGE_NDX(ndx) (ndx >= vis->visual->map_entries || ndx < 0)
+#endif
+ if (OUT_OF_RANGE_NDX(ndx)) {
+ __glutWarning("glutGetColor: index %d out of range", ndx);
+ return -1.0;
+ }
+ return colormap->cells[ndx].component[comp];
+}
+
+void GLUTAPIENTRY
+glutCopyColormap(int winnum)
+{
+ GLUTwindow *window = __glutWindowList[winnum - 1];
+ GLUTcolormap *oldcmap, *newcmap;
+ XVisualInfo *dstvis;
+
+ if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
+ oldcmap = __glutCurrentWindow->colormap;
+ dstvis = __glutCurrentWindow->vis;
+ newcmap = window->colormap;
+ } else {
+ oldcmap = __glutCurrentWindow->overlay->colormap;
+ dstvis = __glutCurrentWindow->overlay->vis;
+ if (!window->overlay) {
+ __glutWarning("glutCopyColormap: window %d has no overlay", winnum);
+ return;
+ }
+ newcmap = window->overlay->colormap;
+ }
+
+ if (!oldcmap) {
+ __glutWarning("glutCopyColormap: destination colormap must be color index");
+ return;
+ }
+ if (!newcmap) {
+ __glutWarning(
+ "glutCopyColormap: source colormap of window %d must be color index",
+ winnum);
+ return;
+ }
+ if (newcmap == oldcmap) {
+ /* Source and destination are the same; now copy needed. */
+ return;
+ }
+#if !defined(_WIN32)
+ /* Play safe: compare visual IDs, not Visual*'s. */
+ if (newcmap->visual->visualid == oldcmap->visual->visualid) {
+#endif
+ /* Visuals match! "Copy" by reference... */
+ __glutFreeColormap(oldcmap);
+ newcmap->refcnt++;
+ if (__glutCurrentWindow->renderWin == __glutCurrentWindow->win) {
+ __glutCurrentWindow->colormap = newcmap;
+ __glutCurrentWindow->cmap = newcmap->cmap;
+ } else {
+ __glutCurrentWindow->overlay->colormap = newcmap;
+ __glutCurrentWindow->overlay->cmap = newcmap->cmap;
+ }
+ XSetWindowColormap(__glutDisplay, __glutCurrentWindow->renderWin,
+ newcmap->cmap);
+#if !defined(_WIN32)
+ __glutPutOnWorkList(__glutToplevelOf(window), GLUT_COLORMAP_WORK);
+ } else {
+ GLUTcolormap *copycmap;
+ XColor color;
+ int i, last;
+
+ /* Visuals different - need a distinct X colormap! */
+ copycmap = __glutAssociateNewColormap(dstvis);
+ /* Wouldn't it be nice if XCopyColormapAndFree could be
+ told not to free the old colormap's entries! */
+ last = newcmap->size;
+ if (last > copycmap->size) {
+ last = copycmap->size;
+ }
+ for (i = last - 1; i >= 0; i--) {
+ if (newcmap->cells[i].component[GLUT_RED] >= 0.0) {
+ color.pixel = i;
+ copycmap->cells[i].component[GLUT_RED] =
+ newcmap->cells[i].component[GLUT_RED];
+ color.red = (GLfloat) 0xffff *
+ newcmap->cells[i].component[GLUT_RED];
+ copycmap->cells[i].component[GLUT_GREEN] =
+ newcmap->cells[i].component[GLUT_GREEN];
+ color.green = (GLfloat) 0xffff *
+ newcmap->cells[i].component[GLUT_GREEN];
+ copycmap->cells[i].component[GLUT_BLUE] =
+ newcmap->cells[i].component[GLUT_BLUE];
+ color.blue = (GLfloat) 0xffff *
+ newcmap->cells[i].component[GLUT_BLUE];
+ color.flags = DoRed | DoGreen | DoBlue;
+ XStoreColor(__glutDisplay, copycmap->cmap, &color);
+ }
+ }
+ }
+#endif
+}
+/* ENDCENTRY */
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