aboutsummaryrefslogtreecommitdiffstats
path: root/test/native/glExtensionsListGL3.c
diff options
context:
space:
mode:
Diffstat (limited to 'test/native/glExtensionsListGL3.c')
-rw-r--r--test/native/glExtensionsListGL3.c300
1 files changed, 300 insertions, 0 deletions
diff --git a/test/native/glExtensionsListGL3.c b/test/native/glExtensionsListGL3.c
new file mode 100644
index 000000000..c531577e8
--- /dev/null
+++ b/test/native/glExtensionsListGL3.c
@@ -0,0 +1,300 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <GL/gl.h>
+#include <GL/glext.h>
+#include <GL/glx.h>
+#include <GL/glxext.h>
+
+typedef int bool;
+#define true 1;
+#define false 0;
+
+// Helper to check for extension string presence. Adapted from:
+// http://www.opengl.org/resources/features/OGLextensions/
+static bool isExtensionSupported(const char *extList, const char *extension)
+{
+
+ const char *start;
+ const char *where, *terminator;
+
+ /* Extension names should not have spaces. */
+ where = strchr(extension, ' ');
+ if ( where || *extension == '\0' )
+ return false;
+
+ /* It takes a bit of care to be fool-proof about parsing the
+ OpenGL extensions string. Don't be fooled by sub-strings,
+ etc. */
+ for ( start = extList; ; ) {
+ where = strstr( start, extension );
+
+ if ( !where )
+ break;
+
+ terminator = where + strlen( extension );
+
+ if ( where == start || *(where - 1) == ' ' )
+ if ( *terminator == ' ' || *terminator == '\0' )
+ return true;
+
+ start = terminator;
+ }
+
+ return false;
+}
+
+static bool ctxErrorOccurred = false;
+static int ctxErrorHandler( Display *dpy, XErrorEvent *ev )
+{
+ ctxErrorOccurred = true;
+ return 0;
+}
+
+void dumpGLExtension() {
+ PFNGLGETSTRINGIPROC glGetStringi = 0;
+ int i, n;
+
+ fprintf(stderr, "GL_VENDOR: %s\n", glGetString(GL_VENDOR));
+
+ glGetIntegerv(GL_NUM_EXTENSIONS, &n);
+ fprintf(stderr, "GL_NUM_EXTENSIONS: %d\n", n);
+
+ glGetStringi = (PFNGLGETSTRINGIPROC)glXGetProcAddressARB("glGetStringi");
+ if(NULL==glGetStringi) {
+ return;
+ }
+
+ for (i=0; i<n; i++) {
+ const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
+ fprintf(stderr, "GL_EXTENSION %d/%d: %s\n", (i+1), n, extension);
+ }
+
+}
+
+int main (int argc, char ** argv)
+{
+ Display *display = XOpenDisplay(0);
+
+ if ( !display )
+ {
+ printf( "Failed to open X display\n" );
+ exit(1);
+ }
+
+ // Get a matching FB config
+ static int visual_attribs[] =
+ {
+ GLX_X_RENDERABLE , True,
+ GLX_DRAWABLE_TYPE , GLX_WINDOW_BIT,
+ GLX_RENDER_TYPE , GLX_RGBA_BIT,
+ GLX_X_VISUAL_TYPE , GLX_TRUE_COLOR,
+ GLX_RED_SIZE , 8,
+ GLX_GREEN_SIZE , 8,
+ GLX_BLUE_SIZE , 8,
+ GLX_ALPHA_SIZE , 8,
+ GLX_DEPTH_SIZE , 24,
+ GLX_STENCIL_SIZE , 8,
+ GLX_DOUBLEBUFFER , True,
+ //GLX_SAMPLE_BUFFERS , 1,
+ //GLX_SAMPLES , 4,
+ None
+ };
+
+ int glx_major, glx_minor;
+
+ // FBConfigs were added in GLX version 1.3.
+ if ( !glXQueryVersion( display, &glx_major, &glx_minor ) ||
+ ( ( glx_major == 1 ) && ( glx_minor < 3 ) ) || ( glx_major < 1 ) )
+ {
+ printf( "Invalid GLX version" );
+ exit(1);
+ }
+
+ printf( "Getting matching framebuffer configs\n" );
+ int fbcount;
+ GLXFBConfig *fbc = glXChooseFBConfig( display, DefaultScreen( display ),
+ visual_attribs, &fbcount );
+ if ( !fbc )
+ {
+ printf( "Failed to retrieve a framebuffer config\n" );
+ exit(1);
+ }
+ printf( "Found %d matching FB configs.\n", fbcount );
+
+ // Pick the FB config/visual with the most samples per pixel
+ printf( "Getting XVisualInfos\n" );
+ int best_fbc = -1, worst_fbc = -1, best_num_samp = -1, worst_num_samp = 999;
+
+ int i;
+ for ( i = 0; i < fbcount; i++ )
+ {
+ XVisualInfo *vi = glXGetVisualFromFBConfig( display, fbc[i] );
+ if ( vi )
+ {
+ int samp_buf, samples;
+ glXGetFBConfigAttrib( display, fbc[i], GLX_SAMPLE_BUFFERS, &samp_buf );
+ glXGetFBConfigAttrib( display, fbc[i], GLX_SAMPLES , &samples );
+
+ printf( " Matching fbconfig %d, visual ID 0x%2x: SAMPLE_BUFFERS = %d,"
+ " SAMPLES = %d\n",
+ (int)i, (int)( vi -> visualid), samp_buf, samples );
+
+ if ( best_fbc < 0 || samp_buf && samples > best_num_samp )
+ best_fbc = i, best_num_samp = samples;
+ if ( worst_fbc < 0 || !samp_buf || samples < worst_num_samp )
+ worst_fbc = i, worst_num_samp = samples;
+ }
+ XFree( vi );
+ }
+
+ GLXFBConfig bestFbc = fbc[ best_fbc ];
+
+ // Be sure to free the FBConfig list allocated by glXChooseFBConfig()
+ XFree( fbc );
+
+ // Get a visual
+ XVisualInfo *vi = glXGetVisualFromFBConfig( display, bestFbc );
+ printf( "Chosen visual ID = 0x%x\n", (int) vi->visualid );
+
+ printf( "Creating colormap\n" );
+ XSetWindowAttributes swa;
+ Colormap cmap;
+ swa.colormap = cmap = XCreateColormap( display,
+ RootWindow( display, vi->screen ),
+ vi->visual, AllocNone );
+ swa.background_pixmap = None ;
+ swa.border_pixel = 0;
+ swa.event_mask = StructureNotifyMask;
+
+ printf( "Creating window\n" );
+ Window win = XCreateWindow( display, RootWindow( display, vi->screen ),
+ 0, 0, 100, 100, 0, vi->depth, InputOutput,
+ vi->visual,
+ CWBorderPixel|CWColormap|CWEventMask, &swa );
+ if ( !win )
+ {
+ printf( "Failed to create window.\n" );
+ exit(1);
+ }
+
+ // Done with the visual info data
+ XFree( vi );
+
+ XStoreName( display, win, "GL 3.0 Window" );
+
+ printf( "Mapping window\n" );
+ XMapWindow( display, win );
+
+ // Get the default screen's GLX extension list
+ const char *glxExts = glXQueryExtensionsString( display,
+ DefaultScreen( display ) );
+
+ // NOTE: It is not necessary to create or make current to a context before
+ // calling glXGetProcAddressARB
+ PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = 0;
+ glXCreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
+ glXGetProcAddressARB( (const GLubyte *) "glXCreateContextAttribsARB" );
+
+ GLXContext ctx = 0;
+
+ // Install an X error handler so the application won't exit if GL 3.0
+ // context allocation fails.
+ //
+ // Note this error handler is global. All display connections in all threads
+ // of a process use the same error handler, so be sure to guard against other
+ // threads issuing X commands while this code is running.
+ ctxErrorOccurred = false;
+ int (*oldHandler)(Display*, XErrorEvent*) =
+ XSetErrorHandler(&ctxErrorHandler);
+
+ // Check for the GLX_ARB_create_context extension string and the function.
+ // If either is not present, use GLX 1.3 context creation method.
+ if ( !isExtensionSupported( glxExts, "GLX_ARB_create_context" ) ||
+ !glXCreateContextAttribsARB )
+ {
+ printf( "glXCreateContextAttribsARB() not found"
+ " ... using old-style GLX context\n" );
+ ctx = glXCreateNewContext( display, bestFbc, GLX_RGBA_TYPE, 0, True );
+ }
+
+ // If it does, try to get a GL 3.0 context!
+ else
+ {
+ int context_attribs[] =
+ {
+ GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
+ GLX_CONTEXT_MINOR_VERSION_ARB, 0,
+ GLX_RENDER_TYPE , GLX_RGBA_TYPE,
+ GLX_CONTEXT_FLAGS_ARB , GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+ None
+ };
+
+ printf( "Creating context\n" );
+ ctx = glXCreateContextAttribsARB( display, bestFbc, 0,
+ True, context_attribs );
+
+ // Sync to ensure any errors generated are processed.
+ XSync( display, False );
+ if ( !ctxErrorOccurred && ctx ) {
+ printf( "Created GL 3.0 context\n" );
+ } else
+ {
+ // Couldn't create GL 3.0 context. Fall back to old-style 2.x context.
+ // When a context version below 3.0 is requested, implementations will
+ // return the newest context version compatible with OpenGL versions less
+ // than version 3.0.
+ // GLX_CONTEXT_MAJOR_VERSION_ARB = 1
+ context_attribs[1] = 1;
+ // GLX_CONTEXT_MINOR_VERSION_ARB = 0
+ context_attribs[3] = 0;
+
+ ctxErrorOccurred = false;
+
+ printf( "Failed to create GL 3.0 context"
+ " ... using old-style GLX context\n" );
+ ctx = glXCreateContextAttribsARB( display, bestFbc, 0,
+ True, context_attribs );
+ }
+ }
+
+ // Sync to ensure any errors generated are processed.
+ XSync( display, False );
+
+ // Restore the original error handler
+ XSetErrorHandler( oldHandler );
+
+ if ( ctxErrorOccurred || !ctx )
+ {
+ printf( "Failed to create an OpenGL context\n" );
+ exit(1);
+ }
+
+ // Verifying that context is a direct context
+ if ( ! glXIsDirect ( display, ctx ) )
+ {
+ printf( "Indirect GLX rendering context obtained\n" );
+ }
+ else
+ {
+ printf( "Direct GLX rendering context obtained\n" );
+ }
+
+ printf( "Making context current\n" );
+ glXMakeCurrent( display, win, ctx );
+
+ dumpGLExtension();
+
+ glXMakeCurrent( display, 0, 0 );
+ glXDestroyContext( display, ctx );
+
+ XDestroyWindow( display, win );
+ XFreeColormap( display, cmap );
+ XCloseDisplay( display );
+
+ return 0;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 05:50:39 +0000