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/*
* Copyright (C) 2018 Tomasz Kramkowski <tk@the-tk.com>
* SPDX-License-Identifier: MIT
*/
#include <setjmp.h>
#include "loadgl.h"
#define LGL_FUNC(name, glname) \
name##_func *name; \
static const char *name##_gln = #glname;
LGL_FUNC(gl_viewport, glViewport);
LGL_FUNC(gl_clearcolor, glClearColor);
LGL_FUNC(gl_clear, glClear);
LGL_FUNC(gl_buf_gen, glGenBuffers);
LGL_FUNC(gl_buf_bind, glBindBuffer);
LGL_FUNC(gl_buf_data, glBufferData);
LGL_FUNC(gl_shdr_create, glCreateShader);
LGL_FUNC(gl_shdr_del, glDeleteShader);
LGL_FUNC(gl_shdr_source, glShaderSource);
LGL_FUNC(gl_shdr_compile, glCompileShader);
LGL_FUNC(gl_shdr_param, glGetShaderiv);
LGL_FUNC(gl_shdr_infolog, glGetShaderInfoLog);
LGL_FUNC(gl_prog_create, glCreateProgram);
LGL_FUNC(gl_prog_attachshdr, glAttachShader);
LGL_FUNC(gl_prog_link, glLinkProgram);
LGL_FUNC(gl_prog_use, glUseProgram);
LGL_FUNC(gl_prog_del, glDeleteProgram);
LGL_FUNC(gl_prog_param, glGetProgramiv);
LGL_FUNC(gl_prog_infolog, glGetProgramInfoLog);
LGL_FUNC(gl_va_define, glVertexAttribPointer);
LGL_FUNC(gl_va_enable, glEnableVertexAttribArray);
LGL_FUNC(gl_va_disable, glDisableVertexAttribArray);
LGL_FUNC(gl_va_gen, glGenVertexArrays);
LGL_FUNC(gl_va_bind, glBindVertexArray);
LGL_FUNC(gl_draw_arrays, glDrawArrays);
LGL_FUNC(gl_draw_elems, glDrawElements);
LGL_FUNC(gl_poly_mode, glPolygonMode);
static void *load_func(const char *name, lgl_loadfunc *load, jmp_buf env)
{
void *ret;
ret = load(name);
if (ret == NULL)
longjmp(env, LGL_MISSING);
return ret;
}
enum lgl_status lgl_load(lgl_loadfunc *load)
{
enum lgl_status status;
jmp_buf env;
status = setjmp(env);
if (status != 0)
return status;
#define LGL_LOAD(name) name = (name##_func *)load_func(name##_gln, load, env);
LGL_LOAD(gl_viewport);
LGL_LOAD(gl_clearcolor);
LGL_LOAD(gl_clear);
LGL_LOAD(gl_buf_gen);
LGL_LOAD(gl_buf_bind);
LGL_LOAD(gl_buf_data);
LGL_LOAD(gl_shdr_create);
LGL_LOAD(gl_shdr_del);
LGL_LOAD(gl_shdr_source);
LGL_LOAD(gl_shdr_compile);
LGL_LOAD(gl_shdr_param);
LGL_LOAD(gl_shdr_infolog);
LGL_LOAD(gl_prog_create);
LGL_LOAD(gl_prog_attachshdr);
LGL_LOAD(gl_prog_link);
LGL_LOAD(gl_prog_use);
LGL_LOAD(gl_prog_del);
LGL_LOAD(gl_prog_param);
LGL_LOAD(gl_prog_infolog);
LGL_LOAD(gl_va_define);
LGL_LOAD(gl_va_enable);
LGL_LOAD(gl_va_disable);
LGL_LOAD(gl_va_gen);
LGL_LOAD(gl_va_bind);
LGL_LOAD(gl_draw_arrays);
LGL_LOAD(gl_draw_elems);
LGL_LOAD(gl_poly_mode);
return LGL_OK;
}
const char *lgl_strerror(enum lgl_status status)
{
switch (status) {
case LGL_OK: return "Success";
case LGL_MISSING: return "Missing function";
}
return "Unknown";
}
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