228 lines
7.9 KiB
C
228 lines
7.9 KiB
C
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/*
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* OpenGL pbuffers utility functions.
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*
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* Brian Paul
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* April 1997
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* Updated on 5 October 2002
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*/
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#include <stdio.h>
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#include <string.h>
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#include "pbutil.h"
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/*
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* Test if we pixel buffers are available for a particular X screen.
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* Input: dpy - the X display
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* screen - screen number
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* Return: 0 = pixel buffers not available.
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* 1 = pixel buffers are available.
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*/
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int
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QueryPbuffers(Display *dpy, int screen)
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{
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#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
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char *extensions;
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extensions = (char *) glXQueryServerString(dpy, screen, GLX_EXTENSIONS);
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if (!strstr(extensions,"GLX_SGIX_fbconfig")) {
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return 0;
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}
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if (!strstr(extensions,"GLX_SGIX_pbuffer")) {
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return 0;
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}
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return 1;
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#else
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return 0;
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#endif
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}
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#ifdef GLX_SGIX_fbconfig
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/*
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* Print parameters for a GLXFBConfig to stdout.
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* Input: dpy - the X display
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* fbConfig - the fbconfig handle
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* horizFormat - if true, print in horizontal format
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*/
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void
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PrintFBConfigInfo(Display *dpy, GLXFBConfigSGIX fbConfig, Bool horizFormat)
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{
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int pbAttribs[] = {GLX_LARGEST_PBUFFER_SGIX, True,
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GLX_PRESERVED_CONTENTS_SGIX, False,
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None};
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GLXPbufferSGIX pBuffer;
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int width=2, height=2;
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int bufferSize, level, doubleBuffer, stereo, auxBuffers;
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int redSize, greenSize, blueSize, alphaSize;
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int depthSize, stencilSize;
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int accumRedSize, accumBlueSize, accumGreenSize, accumAlphaSize;
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int sampleBuffers, samples;
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int drawableType, renderType, xRenderable, xVisual, id;
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int maxWidth, maxHeight, maxPixels;
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int optWidth, optHeight;
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_BUFFER_SIZE, &bufferSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_LEVEL, &level);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DOUBLEBUFFER, &doubleBuffer);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_STEREO, &stereo);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_AUX_BUFFERS, &auxBuffers);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_RED_SIZE, &redSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_GREEN_SIZE, &greenSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_BLUE_SIZE, &blueSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ALPHA_SIZE, &alphaSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DEPTH_SIZE, &depthSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_STENCIL_SIZE, &stencilSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_RED_SIZE, &accumRedSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_GREEN_SIZE, &accumGreenSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_BLUE_SIZE, &accumBlueSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_ALPHA_SIZE, &accumAlphaSize);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_SAMPLE_BUFFERS_SGIS, &sampleBuffers);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_SAMPLES_SGIS, &samples);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DRAWABLE_TYPE_SGIX, &drawableType);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_RENDER_TYPE_SGIX, &renderType);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_X_RENDERABLE_SGIX, &xRenderable);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_X_VISUAL_TYPE_EXT, &xVisual);
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if (!xRenderable || !(drawableType & GLX_WINDOW_BIT_SGIX))
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xVisual = -1;
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_FBCONFIG_ID_SGIX, &id);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_WIDTH_SGIX,
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&maxWidth);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_HEIGHT_SGIX,
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&maxHeight);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_PIXELS_SGIX,
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&maxPixels);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_OPTIMAL_PBUFFER_WIDTH_SGIX,
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&optWidth);
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glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX,
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&optHeight);
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pBuffer = CreatePbuffer(dpy, fbConfig, width, height, pbAttribs);
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if (horizFormat) {
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printf("0x%03x ", id);
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if (xVisual==GLX_STATIC_GRAY) printf("StaticGray ");
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else if (xVisual==GLX_GRAY_SCALE) printf("GrayScale ");
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else if (xVisual==GLX_STATIC_COLOR) printf("StaticColor ");
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else if (xVisual==GLX_PSEUDO_COLOR) printf("PseudoColor ");
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else if (xVisual==GLX_TRUE_COLOR) printf("TrueColor ");
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else if (xVisual==GLX_DIRECT_COLOR) printf("DirectColor ");
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else printf(" -none- ");
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printf(" %3d %3d %s %s %s %2s ", bufferSize, level,
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(renderType & GLX_RGBA_BIT_SGIX) ? "y" : "n",
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(renderType & GLX_COLOR_INDEX_BIT_SGIX) ? "y" : "n",
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doubleBuffer ? "y" : "n",
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stereo ? "y" : "n");
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printf("%2d %2d %2d %2d ", redSize, greenSize, blueSize, alphaSize);
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printf("%2d %2d ", depthSize, stencilSize);
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printf("%2d %2d %2d %2d", accumRedSize, accumGreenSize, accumBlueSize,
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accumAlphaSize);
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printf(" %2d %2d", sampleBuffers, samples);
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printf(" %s", pBuffer ? "y" : "n");
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printf("\n");
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}
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else {
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printf("Id 0x%x\n", id);
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printf(" Buffer Size: %d\n", bufferSize);
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printf(" Level: %d\n", level);
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printf(" Double Buffer: %s\n", doubleBuffer ? "yes" : "no");
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printf(" Stereo: %s\n", stereo ? "yes" : "no");
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printf(" Aux Buffers: %d\n", auxBuffers);
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printf(" Red Size: %d\n", redSize);
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printf(" Green Size: %d\n", greenSize);
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printf(" Blue Size: %d\n", blueSize);
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printf(" Alpha Size: %d\n", alphaSize);
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printf(" Depth Size: %d\n", depthSize);
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printf(" Stencil Size: %d\n", stencilSize);
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printf(" Accum Red Size: %d\n", accumRedSize);
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printf(" Accum Green Size: %d\n", accumGreenSize);
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printf(" Accum Blue Size: %d\n", accumBlueSize);
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printf(" Accum Alpha Size: %d\n", accumAlphaSize);
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printf(" Sample Buffers: %d\n", sampleBuffers);
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printf(" Samples/Pixel: %d\n", samples);
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printf(" Drawable Types: ");
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if (drawableType & GLX_WINDOW_BIT_SGIX) printf("Window ");
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if (drawableType & GLX_PIXMAP_BIT_SGIX) printf("Pixmap ");
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if (drawableType & GLX_PBUFFER_BIT_SGIX) printf("PBuffer");
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printf("\n");
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printf(" Render Types: ");
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if (renderType & GLX_RGBA_BIT_SGIX) printf("RGBA ");
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if (renderType & GLX_COLOR_INDEX_BIT_SGIX) printf("CI ");
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printf("\n");
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printf(" X Renderable: %s\n", xRenderable ? "yes" : "no");
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/*
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printf(" Max width: %d\n", maxWidth);
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printf(" Max height: %d\n", maxHeight);
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printf(" Max pixels: %d\n", maxPixels);
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printf(" Optimum width: %d\n", optWidth);
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printf(" Optimum height: %d\n", optHeight);
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*/
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printf(" Pbuffer: %s\n", pBuffer ? "yes" : "no");
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}
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if (pBuffer) {
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glXDestroyGLXPbufferSGIX(dpy, pBuffer);
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}
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}
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/* This is only used by CreatePbuffer() */
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static int XErrorFlag = 0;
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static int HandleXError( Display *dpy, XErrorEvent *event )
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{
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XErrorFlag = 1;
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return 0;
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}
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/*
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* Create a Pbuffer. Use an X error handler to deal with potential
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* BadAlloc errors.
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*
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* Input: dpy - the X display
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* fbConfig - an FBConfig as returned by glXChooseFBConfigSGIX().
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* width, height - size of pixel buffer to request, in pixels.
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* pbAttribs - list of pixel buffer attributes as used by
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* glXCreateGLXPbufferSGIX().
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* Return: a pixel buffer or None.
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*/
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GLXPbufferSGIX
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CreatePbuffer( Display *dpy, GLXFBConfigSGIX fbConfig,
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int width, int height, int *pbAttribs )
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{
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int (*oldHandler)( Display *, XErrorEvent * );
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GLXPbufferSGIX pBuffer = None;
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/* Catch X protocol errors with our own error handler */
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oldHandler = XSetErrorHandler( HandleXError );
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XErrorFlag = 0;
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pBuffer = glXCreateGLXPbufferSGIX(dpy, fbConfig, width, height, pbAttribs);
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/* Restore original X error handler */
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(void) XSetErrorHandler( oldHandler );
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/* Return pbuffer (may be None) */
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if (!XErrorFlag && pBuffer!=None) {
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/*printf("config %d worked!\n", i);*/
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return pBuffer;
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}
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else {
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return None;
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}
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}
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#endif /*GLX_SGIX_fbconfig*/
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