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#import <OpenGLES/EAGL.h>
#import <OpenGLES/ES2/gl.h>
#import <cpuinfo.h>
#import <log.h>
#import <gpu/api.h>
#if ! __has_feature(objc_arc)
#error "This file must be built with Automatic Reference Counting (-fobjc-arc option)"
#endif
void cpuinfo_gpu_ios_query_gles2(char gpu_name[restrict static CPUINFO_GPU_NAME_MAX]) {
EAGLContext *const existing_context = [EAGLContext currentContext];
EAGLContext *new_context = nil;
if (!existing_context) {
/* No existing context: create new context */
/* OpenGL ES 2.0 is supported by iPhone 3GS and up */
new_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
if (!new_context) {
cpuinfo_log_warning("failed to initialize OpenGLES context");
}
/* Set context */
if (![EAGLContext setCurrentContext:new_context]) {
cpuinfo_log_warning("failed to set current OpenGLES context");
}
}
const char* renderer_str = (const char*) glGetString(GL_RENDERER);
if (renderer_str != NULL) {
strncpy(gpu_name, renderer_str, CPUINFO_GPU_NAME_MAX - 1);
gpu_name[CPUINFO_GPU_NAME_MAX - 1] = '\0';
cpuinfo_log_debug("GL_RENDERER: %s", renderer_str);
} else {
cpuinfo_log_warning("failed to get GL_RENDERER for OpenGLES context");
}
if (new_context) {
/* Reset context back to the original one */
if (![EAGLContext setCurrentContext:nil]) {
cpuinfo_log_warning("failed to reset OpenGLES context");
}
}
}
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