src/gl_common.c


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#define AL_LOG_SECTION "gl"
#include <al/log.h>
#include <al/lib.h>

#include "gl_common.h"

// https://stackoverflow.com/a/49236965
#define ERROR_CASE_STR(value) case value: return #value;
static const char *glGetErrorString(GLenum error)
{
    switch (error) {
    ERROR_CASE_STR(GL_INVALID_ENUM)
    ERROR_CASE_STR(GL_INVALID_VALUE)
    ERROR_CASE_STR(GL_INVALID_OPERATION)
    ERROR_CASE_STR(GL_OUT_OF_MEMORY)
    default: return "Unknown";
    }
}
#undef ERROR_CASE_STR

bool stl_gl_check_error()
{
    GLenum error;
    bool any_error = false;
    while ((error = glGetError()) != GL_NO_ERROR) {
        log_error("GL error %s, %d.", glGetErrorString(error), error);
        any_error = true;
    }
    return any_error;
}

bool stl_gl_loader_load(void (*(*get_proc_address)(const char *))(void))
{
#ifdef STELA_USE_GLAD
    al_assert(get_proc_address);
#ifdef STELA_USE_GLES
    if (!gladLoadGLES2((GLADloadfunc)get_proc_address)) {
        return false;
    }
#else
    if (!gladLoadGL((GLADloadfunc)get_proc_address)) {
        return false;
    }
#endif
#else
    (void)get_proc_address;
#endif
    return true;
}