r_error.h

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/*
Copyright (C) 2002-2025 UFO: Alien Invasion.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#pragma once
 
#include "../../shared/cxx.h"
 
#define R_CheckError() R_CheckErrorDebug(__FILE__, __LINE__, __PRETTY_FUNCTION__)
#define GL_ERROR_TRANSLATE(e) case e: return #e;
 
static inline const char* R_TranslateError (GLenum error)
{
    switch (error) {
    /* openGL errors */
    GL_ERROR_TRANSLATE(GL_INVALID_ENUM)
    GL_ERROR_TRANSLATE(GL_INVALID_VALUE)
    GL_ERROR_TRANSLATE(GL_INVALID_OPERATION)
    GL_ERROR_TRANSLATE(GL_OUT_OF_MEMORY)
    GL_ERROR_TRANSLATE(GL_STACK_OVERFLOW)
    GL_ERROR_TRANSLATE(GL_STACK_UNDERFLOW)
    GL_ERROR_TRANSLATE(GL_INVALID_FRAMEBUFFER_OPERATION_EXT)
    /* framebuffer-extension specific errors */
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_UNSUPPORTED_EXT)
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT)
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT)
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT)
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT)
#ifndef GL_VERSION_ES_CM_1_0
#ifdef GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT)
#endif
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT)
    GL_ERROR_TRANSLATE(GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT)
#endif
    default:
        return "UNKNOWN";
    }
}

static int R_CheckErrorDebug (const char* file, int line, const char* function)
{
    int ret = 0;
    if (r_checkerror && r_checkerror->integer) {
        /* check gl errors (can return multiple errors) */
        for (;;) {
            GLenum error = glGetError();
            if (error != GL_NO_ERROR) {
                Com_Printf("OpenGL err: %s (%d): %s %s (0x%X)\n", file, line,
                        function, R_TranslateError(error), error);
                ret++;
            }
            else
                break;
        }
        /* check framebuffer errors (can *NOT* return multiple errors)*/
        if (qglCheckFramebufferStatusEXT) {
            GLenum error = qglCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
            if (error != GL_FRAMEBUFFER_COMPLETE_EXT) {
                Com_Printf("OpenGL FBO err: %s (%d): %s %s (0x%X)\n", file, line,
                        function, R_TranslateError(error), error);
                ret++;
            }
        }
    } else {
        glGetError();
    }
 
    return ret;
}