void
initContext() {
glretrace::Context *currentContext = glretrace::getCurrentContext();
/* Ensure we have adequate extension support */
assert(currentContext);
supportsTimestamp = currentContext->hasExtension("GL_ARB_timer_query");
supportsElapsed = currentContext->hasExtension("GL_EXT_timer_query") || supportsTimestamp;
supportsOcclusion = currentContext->hasExtension("GL_ARB_occlusion_query");
supportsDebugOutput = currentContext->hasExtension("GL_ARB_debug_output");
supportsARBShaderObjects = currentContext->hasExtension("GL_ARB_shader_objects");
/* Check for timer query support */
if (retrace::profilingGpuTimes) {
if (!supportsTimestamp && !supportsElapsed) {
std::cout << "Error: Cannot run profile, GL_ARB_timer_query or GL_EXT_timer_query extensions are not supported." << std::endl;
exit(-1);
}
GLint bits = 0;
glGetQueryiv(GL_TIME_ELAPSED, GL_QUERY_COUNTER_BITS, &bits);
if (!bits) {
std::cout << "Error: Cannot run profile, GL_QUERY_COUNTER_BITS == 0." << std::endl;
exit(-1);
}
}
/* Check for occlusion query support */
if (retrace::profilingPixelsDrawn && !supportsOcclusion) {
std::cout << "Error: Cannot run profile, GL_ARB_occlusion_query extension is not supported." << std::endl;
exit(-1);
}
/* Setup debug message call back */
if (retrace::debug && supportsDebugOutput) {
glretrace::Context *currentContext = glretrace::getCurrentContext();
glDebugMessageControlARB(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
glDebugMessageCallbackARB(&debugOutputCallback, currentContext);
if (DEBUG_OUTPUT_SYNCHRONOUS) {
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
}
}
/* Sync the gpu and cpu start times */
if (retrace::profilingCpuTimes || retrace::profilingGpuTimes) {
if (!retrace::profiler.hasBaseTimes()) {
double cpuTimeScale = 1.0E9 / getTimeFrequency();
GLint64 currentTime = getCurrentTime() * cpuTimeScale;
retrace::profiler.setBaseCpuTime(currentTime);
retrace::profiler.setBaseGpuTime(currentTime);
}
}
if (retrace::profilingMemoryUsage) {
GLint64 currentVsize, currentRss;
getCurrentVsize(currentVsize);
retrace::profiler.setBaseVsizeUsage(currentVsize);
getCurrentRss(currentRss);
retrace::profiler.setBaseRssUsage(currentRss);
}
}
/*
* Called the first time a context is made current.
*/
void
initContext() {
glretrace::Context *currentContext = glretrace::getCurrentContext();
assert(currentContext);
/* Ensure we have adequate extension support */
glprofile::Profile currentProfile = currentContext->actualProfile();
supportsTimestamp = currentProfile.versionGreaterOrEqual(glprofile::API_GL, 3, 3) ||
currentContext->hasExtension("GL_ARB_timer_query");
supportsElapsed = currentContext->hasExtension("GL_EXT_timer_query") || supportsTimestamp;
supportsOcclusion = currentProfile.versionGreaterOrEqual(glprofile::API_GL, 1, 5);
supportsARBShaderObjects = currentContext->hasExtension("GL_ARB_shader_objects");
currentContext->KHR_debug = currentContext->hasExtension("GL_KHR_debug");
if (currentContext->KHR_debug) {
glGetIntegerv(GL_MAX_DEBUG_MESSAGE_LENGTH, ¤tContext->maxDebugMessageLength);
assert(currentContext->maxDebugMessageLength > 0);
}
#ifdef __APPLE__
// GL_TIMESTAMP doesn't work on Apple. GL_TIME_ELAPSED still does however.
// http://lists.apple.com/archives/mac-opengl/2014/Nov/threads.html#00001
supportsTimestamp = false;
#endif
/* Check for timer query support */
if (retrace::profilingGpuTimes) {
if (!supportsTimestamp && !supportsElapsed) {
std::cout << "error: cannot profile, GL_ARB_timer_query or GL_EXT_timer_query extensions are not supported." << std::endl;
exit(-1);
}
GLint bits = 0;
glGetQueryiv(GL_TIME_ELAPSED, GL_QUERY_COUNTER_BITS, &bits);
if (!bits) {
std::cout << "error: cannot profile, GL_QUERY_COUNTER_BITS == 0." << std::endl;
exit(-1);
}
}
/* Check for occlusion query support */
if (retrace::profilingPixelsDrawn && !supportsOcclusion) {
std::cout << "error: cannot profile, GL_ARB_occlusion_query extension is not supported (" << currentProfile << ")" << std::endl;
exit(-1);
}
/* Setup debug message call back */
if (retrace::debug) {
if (currentContext->KHR_debug) {
if (currentProfile.desktop()) {
glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
glDebugMessageCallback(&debugOutputCallback, currentContext);
} else {
glDebugMessageControlKHR(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
glDebugMessageCallbackKHR(&debugOutputCallback, currentContext);
}
if (DEBUG_OUTPUT_SYNCHRONOUS) {
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
}
} else if (currentContext->hasExtension("GL_ARB_debug_output")) {
glDebugMessageControlARB(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
glDebugMessageCallbackARB(&debugOutputCallback, currentContext);
if (DEBUG_OUTPUT_SYNCHRONOUS) {
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
}
}
}
/* Sync the gpu and cpu start times */
if (retrace::profilingCpuTimes || retrace::profilingGpuTimes) {
if (!retrace::profiler.hasBaseTimes()) {
double cpuTimeScale = 1.0E9 / getTimeFrequency();
GLint64 currentTime = getCurrentTime() * cpuTimeScale;
retrace::profiler.setBaseCpuTime(currentTime);
retrace::profiler.setBaseGpuTime(currentTime);
}
}
if (retrace::profilingMemoryUsage) {
GLint64 currentVsize, currentRss;
getCurrentVsize(currentVsize);
retrace::profiler.setBaseVsizeUsage(currentVsize);
getCurrentRss(currentRss);
retrace::profiler.setBaseRssUsage(currentRss);
}
}
