X-Git-Url: https://git.ralfj.de/gltest.git/blobdiff_plain/141fa68c418105e1e60788f676cd7f6dcf9cbeb1..dac0dad539be501c94cb8646d979e6e7787e1992:/glxbackend.cpp

diff --git a/glxbackend.cpp b/glxbackend.cpp
index 9f8ed3e..3ebc878 100644
--- a/glxbackend.cpp
+++ b/glxbackend.cpp
@@ -17,6 +17,7 @@
  */
 
 #include "glxbackend.h"
+#include "glutil.h"
 
 #include <stdio.h>
 #include <assert.h>
@@ -24,15 +25,18 @@
 #include <GL/glxext.h>
 #include <string>
 
-/* attributes for a double buffered visual in RGBA format with at least
-* 4 bits per color */                       
+#if !defined(CON_GL1)
+#error "Valid GL contexts for GLX are: GL1"
+#endif
+
+// attributes for a double buffered visual in RGBA format with at least 4 bits per color
 static int attrList[] =                                             
-{                                                                      
+{
 	GLX_RGBA, GLX_DOUBLEBUFFER,
-	GLX_RED_SIZE, 4,                                                   
-	GLX_GREEN_SIZE, 4,                                                 
+	GLX_RED_SIZE, 4,
+	GLX_GREEN_SIZE, 4,
 	GLX_BLUE_SIZE, 4,
-	None                                                               
+	None
 };
 
 VisualID GLXBackend::initialize(Display *display)
@@ -42,7 +46,7 @@ VisualID GLXBackend::initialize(Display *display)
 		// debugging: show version information
 		int glxMajor, glxMinor;
 		glXQueryVersion(display, &glxMajor, &glxMinor);
-		printf("Using GLX version %d.%d\n", glxMajor, glxMinor);
+		printf("Using GLX version: %d.%d\n", glxMajor, glxMinor);
 		// check for swap control functions
 		const char *extensions = glXQueryExtensionsString(display, DefaultScreen(display));
 		if (std::string(extensions).find("GLX_MESA_swap_control") != std::string::npos) {
@@ -73,6 +77,9 @@ void GLXBackend::createContext(Window window)
 	context = glXCreateContext(display, vi, 0, GL_TRUE);                             
 	glXMakeCurrent(display, window, context);                                      
 	assert(glXIsDirect(display, context));
+	printf("Using GL version: %s\n", glGetString(GL_VERSION));
+	// initialise GL utilities
+	resolveFunctionPointers((T_glGetProcAddress)glXGetProcAddress);
 }
 
 GLXBackend::~GLXBackend()