RetroArch/gfx/gl_common.h
Themaister 44c52ca4f8 Add -pedantic for shits 'n giggles.
Fix portability issues with void* -> void (*)(void) casts.
Use a more ... bizarre technique ;)
2011-05-31 15:03:59 +02:00

126 lines
3.1 KiB
C

/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
*
* Some code herein may be based on code found in BSNES.
*
* SSNES 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* SSNES 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 SSNES.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GL_COMMON_H
#define __GL_COMMON_H
#include "general.h"
#include <assert.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef __APPLE__
#include <OpenGL/gl.h>
#include <OpenGL/glext.h>
#else
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glext.h>
#endif
static inline bool gl_check_error(void)
{
int error = glGetError();
switch (error)
{
case GL_INVALID_ENUM:
SSNES_ERR("GL: Invalid enum.\n");
break;
case GL_INVALID_VALUE:
SSNES_ERR("GL: Invalid value. (You're not alone.)\n");
break;
case GL_INVALID_OPERATION:
SSNES_ERR("GL: Invalid operation.\n");
break;
case GL_STACK_OVERFLOW:
SSNES_ERR("GL: Stack overflow. (wtf)\n");
break;
case GL_STACK_UNDERFLOW:
SSNES_ERR("GL: Stack underflow. (:v)\n");
break;
case GL_OUT_OF_MEMORY:
SSNES_ERR("GL: Out of memory. Harhar.\n");
break;
case GL_TABLE_TOO_LARGE:
SSNES_ERR("GL: Table too large. Big tables scare you! :(\n");
break;
case GL_NO_ERROR:
return true;
break;
default:
SSNES_ERR("Non specified error :v\n");
}
return false;
}
struct gl_fbo_rect
{
unsigned img_width;
unsigned img_height;
unsigned max_img_width;
unsigned max_img_height;
unsigned width;
unsigned height;
};
enum gl_scale_type
{
SSNES_SCALE_ABSOLUTE,
SSNES_SCALE_INPUT,
SSNES_SCALE_VIEWPORT
};
struct gl_fbo_scale
{
enum gl_scale_type type_x;
enum gl_scale_type type_y;
float scale_x;
float scale_y;
unsigned abs_x;
unsigned abs_y;
bool valid;
};
struct gl_tex_info
{
GLuint tex;
float input_size[2];
float tex_size[2];
float coord[8];
};
// Not legal to cast void* to fn-pointer. Need dirty hack to be compilant.
// sizeof(void*) == sizeof(void (*)(void)) is asserted earlier.
#define SDL_SYM_WRAP(sym, symbol) { \
void *sym__ = SDL_GL_GetProcAddress(symbol); \
memcpy(&(sym), &sym__, sizeof(void*)); \
}
// Windows ... <_<
#if (defined(HAVE_XML) || defined(HAVE_CG)) && defined(_WIN32)
extern PFNGLCLIENTACTIVETEXTUREPROC pglClientActiveTexture;
extern PFNGLACTIVETEXTUREPROC pglActiveTexture;
#else
#define pglClientActiveTexture glClientActiveTexture
#define pglActiveTexture glActiveTexture
#endif
#endif