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Merge pull request #33 from dougbinks/timing

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Support for cases where the gl header does not include GL_ARB_TIMER_QUERY
This commit is contained in:
Mikko Mononen 2014-02-18 19:38:54 +02:00
commit 31f8f6075c
1 changed files with 15 additions and 0 deletions
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15
example/example_gl3.c
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@ -31,6 +31,14 @@
#include "nanovg_gl3buf.h"
#include "demo.h"
// timer query support
#ifndef GL_ARB_timer_query
#define GL_TIME_ELAPSED 0x88BF
typedef void (APIENTRY *pfnGLGETQUERYOBJECTUI64V)(GLuint id, GLenum pname, GLuint64* params);
pfnGLGETQUERYOBJECTUI64V glGetQueryObjectui64v = 0;
#endif
void errorcb(int error, const char* desc)
{
printf("GLFW error %d: %s\n", error, desc);
@ -117,6 +125,13 @@ int main()
timerquery = glfwExtensionSupported("GL_ARB_timer_query");
if( timerquery ) {
#ifndef GL_ARB_timer_query
glGetQueryObjectui64v = (pfnGLGETQUERYOBJECTUI64V)glfwGetProcAddress("glGetQueryObjectui64v");
if( !glGetQueryObjectui64v )
{
timerquery = GL_FALSE;
}
#endif
glGenQueries(NUM_QUERIES, timerqueryid);
}