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Diffstat (limited to 'progs/xdemos/pbutil.c')
| -rw-r--r-- | progs/xdemos/pbutil.c | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/progs/xdemos/pbutil.c b/progs/xdemos/pbutil.c new file mode 100644 index 00000000000..d0bbd1b0fce --- /dev/null +++ b/progs/xdemos/pbutil.c @@ -0,0 +1,426 @@ + +/* + * OpenGL pbuffers utility functions. + * + * Brian Paul + * Original code: April 1997 + * Updated on 5 October 2002 + * Updated again on 3 January 2005 to use GLX 1.3 functions in preference + * to the GLX_SGIX_fbconfig/pbuffer extensions. + */ + +#include <stdio.h> +#include <string.h> +#include "pbutil.h" + + +/** + * Test if we pixel buffers are available for a particular X screen. + * Input: dpy - the X display + * screen - screen number + * Return: 0 = pixel buffers not available. + * 1 = pixel buffers are available via GLX 1.3. + * 2 = pixel buffers are available via GLX_SGIX_fbconfig/pbuffer. + */ +int +QueryPbuffers(Display *dpy, int screen) +{ +#if defined(GLX_VERSION_1_3) + { + /* GLX 1.3 supports pbuffers */ + int glxVersionMajor, glxVersionMinor; + if (!glXQueryVersion(dpy, &glxVersionMajor, &glxVersionMinor)) { + /* GLX not available! */ + return 0; + } + if (glxVersionMajor * 100 + glxVersionMinor >= 103) { + return 1; + } + /* fall-through */ + } +#endif + +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + /* Try the SGIX extensions */ + { + char *extensions; + extensions = (char *) glXQueryServerString(dpy, screen, GLX_EXTENSIONS); + if (!extensions || + !strstr(extensions,"GLX_SGIX_fbconfig") || + !strstr(extensions,"GLX_SGIX_pbuffer")) { + return 0; + } + return 2; + } +#endif + + return 0; +} + + + +FBCONFIG * +ChooseFBConfig(Display *dpy, int screen, const int attribs[], int *nConfigs) +{ + int pbSupport = QueryPbuffers(dpy, screen); +#if defined(GLX_VERSION_1_3) + if (pbSupport == 1) { + return glXChooseFBConfig(dpy, screen, attribs, nConfigs); + } +#endif +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + if (pbSupport == 2) { + return glXChooseFBConfigSGIX(dpy, screen, (int *) attribs, nConfigs); + } +#endif + return NULL; +} + + +FBCONFIG * +GetAllFBConfigs(Display *dpy, int screen, int *nConfigs) +{ + int pbSupport = QueryPbuffers(dpy, screen); +#if defined(GLX_VERSION_1_3) + if (pbSupport == 1) { + return glXGetFBConfigs(dpy, screen, nConfigs); + } +#endif +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + if (pbSupport == 2) { + /* The GLX_SGIX_fbconfig extensions says to pass NULL to get list + * of all available configurations. + */ + return glXChooseFBConfigSGIX(dpy, screen, NULL, nConfigs); + } +#endif + return NULL; +} + + +XVisualInfo * +GetVisualFromFBConfig(Display *dpy, int screen, FBCONFIG config) +{ + int pbSupport = QueryPbuffers(dpy, screen); +#if defined(GLX_VERSION_1_3) + if (pbSupport == 1) { + return glXGetVisualFromFBConfig(dpy, config); + } +#endif +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + if (pbSupport == 2) { + return glXGetVisualFromFBConfigSGIX(dpy, config); + } +#endif + return NULL; +} + + +/** + * Either use glXGetFBConfigAttrib() or glXGetFBConfigAttribSGIX() + * to query an fbconfig attribute. + */ +static int +GetFBConfigAttrib(Display *dpy, int screen, +#if defined(GLX_VERSION_1_3) + const GLXFBConfig config, +#elif defined(GLX_SGIX_fbconfig) + const GLXFBConfigSGIX config, +#endif + int attrib + ) +{ + int pbSupport = QueryPbuffers(dpy, screen); + int value = 0; + +#if defined(GLX_VERSION_1_3) + if (pbSupport == 1) { + /* ok */ + if (glXGetFBConfigAttrib(dpy, config, attrib, &value) != 0) { + value = 0; + } + return value; + } + /* fall-through */ +#endif + +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + if (pbSupport == 2) { + if (glXGetFBConfigAttribSGIX(dpy, config, attrib, &value) != 0) { + value = 0; + } + return value; + } +#endif + + return value; +} + + + +/** + * Print parameters for a GLXFBConfig to stdout. + * Input: dpy - the X display + * screen - the X screen number + * fbConfig - the fbconfig handle + * horizFormat - if true, print in horizontal format + */ +void +PrintFBConfigInfo(Display *dpy, int screen, FBCONFIG config, Bool horizFormat) +{ + PBUFFER pBuffer; + int width=2, height=2; + int bufferSize, level, doubleBuffer, stereo, auxBuffers; + int redSize, greenSize, blueSize, alphaSize; + int depthSize, stencilSize; + int accumRedSize, accumBlueSize, accumGreenSize, accumAlphaSize; + int sampleBuffers, samples; + int drawableType, renderType, xRenderable, xVisual, id; + int maxWidth, maxHeight, maxPixels; + int optWidth, optHeight; + int floatComponents = 0; + + /* do queries using the GLX 1.3 tokens (same as the SGIX tokens) */ + bufferSize = GetFBConfigAttrib(dpy, screen, config, GLX_BUFFER_SIZE); + level = GetFBConfigAttrib(dpy, screen, config, GLX_LEVEL); + doubleBuffer = GetFBConfigAttrib(dpy, screen, config, GLX_DOUBLEBUFFER); + stereo = GetFBConfigAttrib(dpy, screen, config, GLX_STEREO); + auxBuffers = GetFBConfigAttrib(dpy, screen, config, GLX_AUX_BUFFERS); + redSize = GetFBConfigAttrib(dpy, screen, config, GLX_RED_SIZE); + greenSize = GetFBConfigAttrib(dpy, screen, config, GLX_GREEN_SIZE); + blueSize = GetFBConfigAttrib(dpy, screen, config, GLX_BLUE_SIZE); + alphaSize = GetFBConfigAttrib(dpy, screen, config, GLX_ALPHA_SIZE); + depthSize = GetFBConfigAttrib(dpy, screen, config, GLX_DEPTH_SIZE); + stencilSize = GetFBConfigAttrib(dpy, screen, config, GLX_STENCIL_SIZE); + accumRedSize = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_RED_SIZE); + accumGreenSize = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_GREEN_SIZE); + accumBlueSize = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_BLUE_SIZE); + accumAlphaSize = GetFBConfigAttrib(dpy, screen, config, GLX_ACCUM_ALPHA_SIZE); + sampleBuffers = GetFBConfigAttrib(dpy, screen, config, GLX_SAMPLE_BUFFERS); + samples = GetFBConfigAttrib(dpy, screen, config, GLX_SAMPLES); + drawableType = GetFBConfigAttrib(dpy, screen, config, GLX_DRAWABLE_TYPE); + renderType = GetFBConfigAttrib(dpy, screen, config, GLX_RENDER_TYPE); + xRenderable = GetFBConfigAttrib(dpy, screen, config, GLX_X_RENDERABLE); + xVisual = GetFBConfigAttrib(dpy, screen, config, GLX_X_VISUAL_TYPE); + if (!xRenderable || !(drawableType & GLX_WINDOW_BIT_SGIX)) + xVisual = -1; + + id = GetFBConfigAttrib(dpy, screen, config, GLX_FBCONFIG_ID); + maxWidth = GetFBConfigAttrib(dpy, screen, config, GLX_MAX_PBUFFER_WIDTH); + maxHeight = GetFBConfigAttrib(dpy, screen, config, GLX_MAX_PBUFFER_HEIGHT); + maxPixels = GetFBConfigAttrib(dpy, screen, config, GLX_MAX_PBUFFER_PIXELS); +#if defined(GLX_SGIX_pbuffer) + optWidth = GetFBConfigAttrib(dpy, screen, config, GLX_OPTIMAL_PBUFFER_WIDTH_SGIX); + optHeight = GetFBConfigAttrib(dpy, screen, config, GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX); +#else + optWidth = optHeight = 0; +#endif +#if defined(GLX_NV_float_buffer) + floatComponents = GetFBConfigAttrib(dpy, screen, config, GLX_FLOAT_COMPONENTS_NV); +#endif + + /* See if we can create a pbuffer with this config */ + pBuffer = CreatePbuffer(dpy, screen, config, width, height, False, False); + + if (horizFormat) { + printf("0x%-9x ", id); + if (xVisual==GLX_STATIC_GRAY) printf("StaticGray "); + else if (xVisual==GLX_GRAY_SCALE) printf("GrayScale "); + else if (xVisual==GLX_STATIC_COLOR) printf("StaticColor "); + else if (xVisual==GLX_PSEUDO_COLOR) printf("PseudoColor "); + else if (xVisual==GLX_TRUE_COLOR) printf("TrueColor "); + else if (xVisual==GLX_DIRECT_COLOR) printf("DirectColor "); + else printf(" -none- "); + printf(" %3d %3d %s %s %s %2s ", bufferSize, level, + (renderType & GLX_RGBA_BIT_SGIX) ? "y" : ".", + (renderType & GLX_COLOR_INDEX_BIT_SGIX) ? "y" : ".", + doubleBuffer ? "y" : ".", + stereo ? "y" : "."); + printf("%2d %2d %2d %2d ", redSize, greenSize, blueSize, alphaSize); + printf("%2d %2d ", depthSize, stencilSize); + printf("%2d %2d %2d %2d", accumRedSize, accumGreenSize, accumBlueSize, + accumAlphaSize); + printf(" %2d %2d", sampleBuffers, samples); + printf(" %s %c", pBuffer ? "y" : ".", + ".y"[floatComponents]); + printf("\n"); + } + else { + printf("Id 0x%x\n", id); + printf(" Buffer Size: %d\n", bufferSize); + printf(" Level: %d\n", level); + printf(" Double Buffer: %s\n", doubleBuffer ? "yes" : "no"); + printf(" Stereo: %s\n", stereo ? "yes" : "no"); + printf(" Aux Buffers: %d\n", auxBuffers); + printf(" Red Size: %d\n", redSize); + printf(" Green Size: %d\n", greenSize); + printf(" Blue Size: %d\n", blueSize); + printf(" Alpha Size: %d\n", alphaSize); + printf(" Depth Size: %d\n", depthSize); + printf(" Stencil Size: %d\n", stencilSize); + printf(" Accum Red Size: %d\n", accumRedSize); + printf(" Accum Green Size: %d\n", accumGreenSize); + printf(" Accum Blue Size: %d\n", accumBlueSize); + printf(" Accum Alpha Size: %d\n", accumAlphaSize); + printf(" Sample Buffers: %d\n", sampleBuffers); + printf(" Samples/Pixel: %d\n", samples); + printf(" Drawable Types: "); + if (drawableType & GLX_WINDOW_BIT) printf("Window "); + if (drawableType & GLX_PIXMAP_BIT) printf("Pixmap "); + if (drawableType & GLX_PBUFFER_BIT) printf("PBuffer"); + printf("\n"); + printf(" Render Types: "); + if (renderType & GLX_RGBA_BIT_SGIX) printf("RGBA "); + if (renderType & GLX_COLOR_INDEX_BIT_SGIX) printf("CI "); + printf("\n"); + printf(" X Renderable: %s\n", xRenderable ? "yes" : "no"); + + printf(" Pbuffer: %s\n", pBuffer ? "yes" : "no"); + printf(" Max Pbuffer width: %d\n", maxWidth); + printf(" Max Pbuffer height: %d\n", maxHeight); + printf(" Max Pbuffer pixels: %d\n", maxPixels); + printf(" Optimum Pbuffer width: %d\n", optWidth); + printf(" Optimum Pbuffer height: %d\n", optHeight); + + printf(" Float Components: %s\n", floatComponents ? "yes" : "no"); + } + + if (pBuffer) { + DestroyPbuffer(dpy, screen, pBuffer); + } +} + + + +GLXContext +CreateContext(Display *dpy, int screen, FBCONFIG config) +{ + int pbSupport = QueryPbuffers(dpy, screen); +#if defined(GLX_VERSION_1_3) + if (pbSupport == 1) { + /* GLX 1.3 */ + GLXContext c; + c = glXCreateNewContext(dpy, config, GLX_RGBA_TYPE, NULL, True); + if (!c) { + /* try indirect */ + c = glXCreateNewContext(dpy, config, GLX_RGBA_TYPE, NULL, False); + } + return c; + } +#endif +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + if (pbSupport == 2) { + GLXContext c; + c = glXCreateContextWithConfigSGIX(dpy, config, GLX_RGBA_TYPE_SGIX, NULL, True); + if (!c) { + c = glXCreateContextWithConfigSGIX(dpy, config, GLX_RGBA_TYPE_SGIX, NULL, False); + } + return c; + } +#endif + return 0; +} + + +void +DestroyContext(Display *dpy, GLXContext ctx) +{ + glXDestroyContext(dpy, ctx); +} + + +/* This is only used by CreatePbuffer() */ +static int XErrorFlag = 0; +static int HandleXError(Display *dpy, XErrorEvent *event) +{ + XErrorFlag = 1; + return 0; +} + + +/** + * Create a Pbuffer. Use an X error handler to deal with potential + * BadAlloc errors. + * + * Input: dpy - the X display + * fbConfig - an FBConfig as returned by glXChooseFBConfigSGIX(). + * width, height - size of pixel buffer to request, in pixels. + * pbAttribs - list of optional pixel buffer attributes + * Return: a Pbuffer or None. + */ +PBUFFER +CreatePbuffer(Display *dpy, int screen, FBCONFIG config, + int width, int height, Bool largest, Bool preserve) +{ + int (*oldHandler)(Display *, XErrorEvent *); + PBUFFER pBuffer = None; + int pbSupport = QueryPbuffers(dpy, screen); + + /* Catch X protocol errors with our own error handler */ + oldHandler = XSetErrorHandler(HandleXError); + XErrorFlag = 0; + +#if defined(GLX_VERSION_1_3) + if (pbSupport == 1) { + /* GLX 1.3 */ + int attribs[100], i = 0; + attribs[i++] = GLX_PBUFFER_WIDTH; + attribs[i++] = width; + attribs[i++] = GLX_PBUFFER_HEIGHT; + attribs[i++] = height; + attribs[i++] = GLX_PRESERVED_CONTENTS; + attribs[i++] = preserve; + attribs[i++] = GLX_LARGEST_PBUFFER; + attribs[i++] = largest; + attribs[i++] = 0; + pBuffer = glXCreatePbuffer(dpy, config, attribs); + } + else +#endif +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + if (pbSupport == 2) { + int attribs[100], i = 0; + attribs[i++] = GLX_PRESERVED_CONTENTS; + attribs[i++] = preserve; + attribs[i++] = GLX_LARGEST_PBUFFER; + attribs[i++] = largest; + attribs[i++] = 0; + pBuffer = glXCreateGLXPbufferSGIX(dpy, config, width, height, attribs); + } + else +#endif + { + pBuffer = None; + } + + /* Restore original X error handler */ + (void) XSetErrorHandler(oldHandler); + + /* Return pbuffer (may be None) */ + if (!XErrorFlag && pBuffer != None) { + /*printf("config %d worked!\n", i);*/ + return pBuffer; + } + else { + return None; + } +} + + +void +DestroyPbuffer(Display *dpy, int screen, PBUFFER pbuffer) +{ + int pbSupport = QueryPbuffers(dpy, screen); +#if defined(GLX_VERSION_1_3) + if (pbSupport == 1) { + glXDestroyPbuffer(dpy, pbuffer); + return; + } +#endif +#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer) + if (pbSupport == 2) { + glXDestroyGLXPbufferSGIX(dpy, pbuffer); + return; + } +#endif +} |