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/*
* Copyright (C) 2018 Tomasz Kramkowski <tk@the-tk.com>
* SPDX-License-Identifier: MIT
*/
#include "eprintf.h"
#include "gl.h"
#define GL_FUNC(glname, rtype, name, ...) name##_func *name;
#include "glfunc.h"
#undef GL_FUNC
// load_func: load OpenGL function
static void *load_func(const char *name, gl_loadfunc *load)
{
void *ret;
ret = load(name);
if (ret == NULL)
eprintf("Could not load OpenGL function: %s\n", name);
return ret;
}
// gl_load: load required OpenGL functions
void gl_load(gl_loadfunc *load)
{
#define GL_FUNC(glname, rtype, name, ...) \
name = (name##_func *)load_func(#glname, load);
#include "glfunc.h"
#undef GL_FUNC
}
// gl_strerror: format OpenGL error code into a string
const char *gl_strerror(GLenum error)
{
switch (error) {
case GL_NO_ERROR: return "No error";
case GL_INVALID_ENUM: return "Invalid enumeration";
case GL_INVALID_VALUE: return "Invalid value";
case GL_INVALID_OPERATION: return "Invalid operation";
case GL_STACK_OVERFLOW: return "Stack overflow";
case GL_STACK_UNDERFLOW: return "Stack underflow";
case GL_OUT_OF_MEMORY: return "Out of memory";
case GL_INVALID_FRAMEBUFFER_OPERATION: return "Invalid framebuffer operation";
case GL_CONTEXT_LOST: return "Context lost";
}
return "Unknown";
}
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