#elif defined(SYS_X11)
#include <GL/glx.h>
#include <gdk/gdkx.h>
+static gboolean gtk_gl_errors;
+static int gtk_gl_handler(Display *xdisplay, XErrorEvent *xerror)
+{
+ gtk_gl_errors = TRUE;
+ return 0;
+}
+static GLXContext gtk_gl_create_context(Display *xdisplay, XVisualInfo *xvinfo,
+ GLXContext shared, Bool direct)
+{
+ gtk_gl_errors = FALSE;
+ XSync(xdisplay, False);
+ void *handler = XSetErrorHandler(gtk_gl_handler);
+ GLXContext context = glXCreateContext(xdisplay, xvinfo, shared, direct);
+ XSync(xdisplay, False);
+ XSetErrorHandler(handler);
+
+ if (gtk_gl_errors)
+ return 0;
+ return context;
+}
void gtk_gl_enable(GtkWidget *widget)
{
g_debug("GtkGl: enable");
GLX_DOUBLEBUFFER,
GLX_DEPTH_SIZE, 1,
None};
+
XVisualInfo *xvinfo = glXChooseVisual(xdisplay, nscreen, attribs);
if (!xvinfo)
g_error("GtkGl: enable - unable to get valid OpenGL Visual");
- GLXContext context = glXCreateContext(xdisplay, xvinfo, NULL, False);
+ GLXContext context = 0;
+ if (!context)
+ context = gtk_gl_create_context(xdisplay, xvinfo, NULL, True);
+ if (!context)
+ context = gtk_gl_create_context(xdisplay, xvinfo, NULL, False);
+ if (!context)
+ g_error("Unable to create OpenGL context,"
+ "possible graphics driver problem?");
+ g_debug("GtkGl: direct rendering = %d\n", glXIsDirect(xdisplay, context));
+
g_object_set_data(G_OBJECT(widget), "glcontext", context);
/* Fix up colormap */
#elif defined(SYS_WIN)
#include <windows.h>
#include <gdk/gdkwin32.h>
+#include <GL/gl.h>
+
+/* Windows doens't define OpenGL extensions */
+static void APIENTRY (*glMultiTexCoord2dvPtr)(int target, const double *v);
+static void APIENTRY (*glActiveTexturePtr)(int texture);
+
+void APIENTRY glMultiTexCoord2dv(int target, const double *v)
+{
+ glMultiTexCoord2dvPtr(target, v);
+}
+
+void APIENTRY glActiveTexture(int texture)
+{
+ glActiveTexturePtr(texture);
+}
+
+static void init_extensions(void)
+{
+ static gboolean init_done = FALSE;
+ if (init_done)
+ return;
+ init_done = TRUE;
+
+ g_debug("GtkGl: init_extensions");
+ const guchar *exts = NULL;
+ if (!(exts = glGetString(GL_EXTENSIONS)))
+ g_error("GtkGl: Unable to query extensions");
+ if (!(glMultiTexCoord2dvPtr = (void*)wglGetProcAddress("glMultiTexCoord2dvARB")))
+ g_error("GtkGl: Unable to load glMultiTexCoord2dv extension:\n%s", exts);
+ if (!(glActiveTexturePtr = (void*)wglGetProcAddress("glActiveTextureARB")))
+ g_error("GtkGl: Unable to load glActiveTexture extension\n%s", exts);
+ g_debug("GtkGl: extensions - glMultiTexCoord2dvPtr=%p glActiveTexturePtr=%p",
+ glMultiTexCoord2dvPtr, glActiveTexturePtr);
+}
+
+/* gtkgl implementation */
static void on_realize(GtkWidget *widget, gpointer _)
{
g_debug("GtkGl: on_realize");
HGLRC hRC = g_object_get_data(G_OBJECT(widget), "glcontext");
if (!wglMakeCurrent(hDC, hRC))
g_error("GtkGl: wglMakeCurrent failed");
+ init_extensions();
}
void gtk_gl_end(GtkWidget *widget)
}
-
/**************************
* Mac OSX implementation *
**************************/