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#include <mbgl/platform/gl.hpp>
#include <mbgl/util/string.hpp>
#include <mutex>
namespace mbgl {
namespace gl {
std::vector<ExtensionFunctionBase*>& ExtensionFunctionBase::functions() {
static std::vector<ExtensionFunctionBase*> functions;
return functions;
}
static std::once_flag initializeExtensionsOnce;
void InitializeExtensions(glProc (*getProcAddress)(const char *)) {
std::call_once(initializeExtensionsOnce, [getProcAddress] {
const char * extensionsPtr = reinterpret_cast<const char *>(
MBGL_CHECK_ERROR(glGetString(GL_EXTENSIONS)));
if (!extensionsPtr)
return;
const std::string extensions = extensionsPtr;
for (auto fn : ExtensionFunctionBase::functions()) {
for (auto probe : fn->probes) {
if (extensions.find(probe.first) != std::string::npos) {
fn->ptr = getProcAddress(probe.second);
break;
}
}
}
});
}
void checkError(const char *cmd, const char *file, int line) {
const GLenum err = glGetError();
if (err != GL_NO_ERROR) {
const char *error = nullptr;
switch (err) {
case GL_INVALID_ENUM: error = "INVALID_ENUM"; break;
case GL_INVALID_VALUE: error = "INVALID_VALUE"; break;
case GL_INVALID_OPERATION: error = "INVALID_OPERATION"; break;
case GL_INVALID_FRAMEBUFFER_OPERATION: error = "INVALID_FRAMEBUFFER_OPERATION"; break;
case GL_OUT_OF_MEMORY: error = "OUT_OF_MEMORY"; break;
#ifdef GL_STACK_UNDERFLOW
case GL_STACK_UNDERFLOW: error = "STACK_UNDERFLOW"; break;
#endif
#ifdef GL_STACK_OVERFLOW
case GL_STACK_OVERFLOW: error = "STACK_OVERFLOW"; break;
#endif
default: error = "(unknown)"; break;
}
throw ::mbgl::gl::Error(err, std::string(cmd) + ": Error GL_" + error + " - " + file + ":" + util::toString(line));
}
}
}
}
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