+ // Check extensions we use.
+
+ if (!ES) {
+ if (version_major > 3 ||
+ (version_major == 3 && version_minor >= 2)) {
+ GLint num_extensions = 0;
+ glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
+ for (GLint i = 0; i < num_extensions; ++i) {
+ const char *extension = (const char *)glGetStringi(GL_EXTENSIONS, i);
+ if (extension) {
+ if (strcmp(extension, "GL_ARB_sampler_objects") == 0) {
+ ARB_sampler_objects = true;
+ } else if (strcmp(extension, "GL_KHR_debug") == 0) {
+ KHR_debug = true;
+ }
+ }
+ }
+ } else {
+ const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
+ ARB_sampler_objects = glws::checkExtension("GL_ARB_sampler_objects", extensions);
+ KHR_debug = glws::checkExtension("GL_KHR_debug", extensions);
+ }
+ } else {
+ const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
+ KHR_debug = glws::checkExtension("GL_KHR_debug", extensions);
+ }