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#include <mbgl/gl/gl.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/platform/log.hpp>
#include <cassert>
#include <iostream>
#include <unordered_map>
#include <mutex>
namespace mbgl {
namespace gl {
ExtensionFunction<void (GLuint array)>
BindVertexArray({
{"GL_ARB_vertex_array_object", "glBindVertexArray"},
{"GL_OES_vertex_array_object", "glBindVertexArrayOES"},
{"GL_APPLE_vertex_array_object", "glBindVertexArrayAPPLE"}
});
ExtensionFunction<void (GLsizei n, const GLuint* arrays)>
DeleteVertexArrays({
{"GL_ARB_vertex_array_object", "glDeleteVertexArrays"},
{"GL_OES_vertex_array_object", "glDeleteVertexArraysOES"},
{"GL_APPLE_vertex_array_object", "glDeleteVertexArraysAPPLE"}
});
ExtensionFunction<void (GLsizei n, GLuint* arrays)>
GenVertexArrays({
{"GL_ARB_vertex_array_object", "glGenVertexArrays"},
{"GL_OES_vertex_array_object", "glGenVertexArraysOES"},
{"GL_APPLE_vertex_array_object", "glGenVertexArraysAPPLE"}
});
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;
}
}
}
});
}
namespace {
constexpr const char* stringFromError(GLenum err) {
switch (err) {
case GL_INVALID_ENUM:
return "GL_INVALID_ENUM";
case GL_INVALID_VALUE:
return "GL_INVALID_VALUE";
case GL_INVALID_OPERATION:
return "GL_INVALID_OPERATION";
case GL_INVALID_FRAMEBUFFER_OPERATION:
return "GL_INVALID_FRAMEBUFFER_OPERATION";
case GL_OUT_OF_MEMORY:
return "GL_OUT_OF_MEMORY";
#ifdef GL_TABLE_TOO_LARGE
case GL_TABLE_TOO_LARGE:
return "GL_TABLE_TOO_LARGE";
#endif
#ifdef GL_STACK_OVERFLOW
case GL_STACK_OVERFLOW:
return "GL_STACK_OVERFLOW";
#endif
#ifdef GL_STACK_UNDERFLOW
case GL_STACK_UNDERFLOW:
return "GL_STACK_UNDERFLOW";
#endif
#ifdef GL_CONTEXT_LOST
case GL_CONTEXT_LOST:
return "GL_CONTEXT_LOST";
#endif
default:
return "GL_UNKNOWN";
}
}
} // namespace
void checkError(const char* cmd, const char* file, int line) {
GLenum err = GL_NO_ERROR;
if ((err = glGetError()) != GL_NO_ERROR) {
std::string message = std::string(cmd) + ": Error " + stringFromError(err);
// Check for further errors
while ((err = glGetError()) != GL_NO_ERROR) {
message += ", ";
message += stringFromError(err);
}
throw Error(message + " at " + file + ":" + util::toString(line));
}
}
} // namespace gl
} // namespace mbgl
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