* OpenGL pbuffers utility functions.
*
* Brian Paul
- * April 1997
+ * 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 = fbconfigs not available.
+ * 1 = fbconfigs are available via GLX 1.3.
+ * 2 = fbconfigs and pbuffers are available via GLX_SGIX_fbconfig
+ */
+int
+QueryFBConfig(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
+
+ /* Try the SGIX extensions */
+ {
+ char *extensions;
+ extensions = (char *) glXQueryServerString(dpy, screen, GLX_EXTENSIONS);
+ if (extensions && strstr(extensions,"GLX_SGIX_fbconfig")) {
+ return 2;
+ }
+ }
-/*
+ return 0;
+}
+
+/**
* 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.
+ * 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)
{
+ int ret;
+
+ ret = QueryFBConfig(dpy, screen);
+ if (ret == 2) {
+ char *extensions;
+ extensions = (char *) glXQueryServerString(dpy, screen, GLX_EXTENSIONS);
+ if (extensions && strstr(extensions, "GLX_SGIX_pbuffer"))
+ return 2;
+ else
+ return 0;
+ }
+ else
+ return ret;
+}
+
+FBCONFIG *
+ChooseFBConfig(Display *dpy, int screen, const int attribs[], int *nConfigs)
+{
+ int fbcSupport = QueryPbuffers(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+ if (fbcSupport == 1) {
+ return glXChooseFBConfig(dpy, screen, attribs, nConfigs);
+ }
+#endif
#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
- char *extensions;
+ if (fbcSupport == 2) {
+ return glXChooseFBConfigSGIX(dpy, screen, (int *) attribs, nConfigs);
+ }
+#endif
+ return NULL;
+}
+
- extensions = (char *) glXQueryServerString(dpy, screen, GLX_EXTENSIONS);
- if (!strstr(extensions,"GLX_SGIX_fbconfig")) {
- return 0;
+FBCONFIG *
+GetAllFBConfigs(Display *dpy, int screen, int *nConfigs)
+{
+ int fbcSupport = QueryFBConfig(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+ if (fbcSupport == 1) {
+ return glXGetFBConfigs(dpy, screen, nConfigs);
}
- if (!strstr(extensions,"GLX_SGIX_pbuffer")) {
- return 0;
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+ if (fbcSupport == 2) {
+ /* The GLX_SGIX_fbconfig extensions says to pass NULL to get list
+ * of all available configurations.
+ */
+ return glXChooseFBConfigSGIX(dpy, screen, NULL, nConfigs);
}
- return 1;
-#else
- return 0;
#endif
+ return NULL;
}
+XVisualInfo *
+GetVisualFromFBConfig(Display *dpy, int screen, FBCONFIG config)
+{
+ int fbcSupport = QueryFBConfig(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+ if (fbcSupport == 1) {
+ return glXGetVisualFromFBConfig(dpy, config);
+ }
+#endif
+#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
+ if (fbcSupport == 2) {
+ return glXGetVisualFromFBConfigSGIX(dpy, config);
+ }
+#endif
+ return NULL;
+}
-#ifdef GLX_SGIX_fbconfig
+/**
+ * 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 fbcSupport = QueryFBConfig(dpy, screen);
+ int value = 0;
-/*
+#if defined(GLX_VERSION_1_3)
+ if (fbcSupport == 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 (fbcSupport == 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, GLXFBConfigSGIX fbConfig, Bool horizFormat)
+PrintFBConfigInfo(Display *dpy, int screen, FBCONFIG config, Bool horizFormat)
{
- int pbAttribs[] = {GLX_LARGEST_PBUFFER_SGIX, True,
- GLX_PRESERVED_CONTENTS_SGIX, False,
- None};
- GLXPbufferSGIX pBuffer;
+ PBUFFER pBuffer;
int width=2, height=2;
int bufferSize, level, doubleBuffer, stereo, auxBuffers;
int redSize, greenSize, blueSize, alphaSize;
int drawableType, renderType, xRenderable, xVisual, id;
int maxWidth, maxHeight, maxPixels;
int optWidth, optHeight;
+ int floatComponents = 0;
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_BUFFER_SIZE, &bufferSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_LEVEL, &level);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DOUBLEBUFFER, &doubleBuffer);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_STEREO, &stereo);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_AUX_BUFFERS, &auxBuffers);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_RED_SIZE, &redSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_GREEN_SIZE, &greenSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_BLUE_SIZE, &blueSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ALPHA_SIZE, &alphaSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DEPTH_SIZE, &depthSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_STENCIL_SIZE, &stencilSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_RED_SIZE, &accumRedSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_GREEN_SIZE, &accumGreenSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_BLUE_SIZE, &accumBlueSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_ALPHA_SIZE, &accumAlphaSize);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_SAMPLE_BUFFERS_SGIS, &sampleBuffers);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_SAMPLES_SGIS, &samples);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DRAWABLE_TYPE_SGIX, &drawableType);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_RENDER_TYPE_SGIX, &renderType);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_X_RENDERABLE_SGIX, &xRenderable);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_X_VISUAL_TYPE_EXT, &xVisual);
+ /* 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;
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_FBCONFIG_ID_SGIX, &id);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_WIDTH_SGIX,
- &maxWidth);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_HEIGHT_SGIX,
- &maxHeight);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_PIXELS_SGIX,
- &maxPixels);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_OPTIMAL_PBUFFER_WIDTH_SGIX,
- &optWidth);
- glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX,
- &optHeight);
+ 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
- pBuffer = CreatePbuffer(dpy, fbConfig, width, height, pbAttribs);
+ /* See if we can create a pbuffer with this config */
+ pBuffer = CreatePbuffer(dpy, screen, config, width, height, False, False);
if (horizFormat) {
- printf("0x%03x ", id);
+ 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_DIRECT_COLOR) printf("DirectColor ");
else printf(" -none- ");
printf(" %3d %3d %s %s %s %2s ", bufferSize, level,
- (renderType & GLX_RGBA_BIT_SGIX) ? "y" : "n",
- (renderType & GLX_COLOR_INDEX_BIT_SGIX) ? "y" : "n",
- doubleBuffer ? "y" : "n",
- stereo ? "y" : "n");
+ (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", pBuffer ? "y" : "n");
+ printf(" %s %c", pBuffer ? "y" : ".",
+ ".y"[floatComponents]);
printf("\n");
}
else {
printf(" Sample Buffers: %d\n", sampleBuffers);
printf(" Samples/Pixel: %d\n", samples);
printf(" Drawable Types: ");
- if (drawableType & GLX_WINDOW_BIT_SGIX) printf("Window ");
- if (drawableType & GLX_PIXMAP_BIT_SGIX) printf("Pixmap ");
- if (drawableType & GLX_PBUFFER_BIT_SGIX) printf("PBuffer");
+ 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(" Max width: %d\n", maxWidth);
- printf(" Max height: %d\n", maxHeight);
- printf(" Max pixels: %d\n", maxPixels);
- printf(" Optimum width: %d\n", optWidth);
- printf(" Optimum height: %d\n", optHeight);
- */
+
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) {
- glXDestroyGLXPbufferSGIX(dpy, pBuffer);
+ DestroyPbuffer(dpy, screen, pBuffer);
}
}
+GLXContext
+CreateContext(Display *dpy, int screen, FBCONFIG config)
+{
+ int fbcSupport = QueryFBConfig(dpy, screen);
+#if defined(GLX_VERSION_1_3)
+ if (fbcSupport == 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 (fbcSupport == 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 )
+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 pixel buffer attributes as used by
- * glXCreateGLXPbufferSGIX().
- * Return: a pixel buffer or None.
+ * pbAttribs - list of optional pixel buffer attributes
+ * Return: a Pbuffer or None.
*/
-GLXPbufferSGIX
-CreatePbuffer( Display *dpy, GLXFBConfigSGIX fbConfig,
- int width, int height, int *pbAttribs )
+PBUFFER
+CreatePbuffer(Display *dpy, int screen, FBCONFIG config,
+ int width, int height, Bool largest, Bool preserve)
{
- int (*oldHandler)( Display *, XErrorEvent * );
- GLXPbufferSGIX pBuffer = None;
+ int (*oldHandler)(Display *, XErrorEvent *);
+ PBUFFER pBuffer = None;
+ int pbSupport = QueryPbuffers(dpy, screen);
/* Catch X protocol errors with our own error handler */
- oldHandler = XSetErrorHandler( HandleXError );
-
+ oldHandler = XSetErrorHandler(HandleXError);
XErrorFlag = 0;
- pBuffer = glXCreateGLXPbufferSGIX(dpy, fbConfig, width, height, pbAttribs);
+#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;
+ }
+
+ XSync(dpy, False);
/* Restore original X error handler */
- (void) XSetErrorHandler( oldHandler );
+ (void) XSetErrorHandler(oldHandler);
/* Return pbuffer (may be None) */
- if (!XErrorFlag && pBuffer!=None) {
+ if (!XErrorFlag && pBuffer != None) {
/*printf("config %d worked!\n", i);*/
return pBuffer;
}
}
-
-#endif /*GLX_SGIX_fbconfig*/
-
-
+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
+}
projects / mesa.git / blobdiff