a9418f8f63
With GLAD it's not needed anymore to link against OpenGL libraries. As configure knows better whether a platform supports GLAD, detection is moved here. To allow platforms where OpenGL should be linked at build time, the tests are kept. Android uses them for now. The OpenGL for Games was completely decoupled from the OpenGL for 2D engines. This not the case anymore.
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef GRAPHICS_OPENGL_SYSTEM_HEADERS_H
|
|
#define GRAPHICS_OPENGL_SYSTEM_HEADERS_H
|
|
|
|
#include "common/scummsys.h"
|
|
|
|
// On OS X we only support GL contexts. The reason is that Apple's GL interface
|
|
// uses "void *" for GLhandleARB which is not type compatible with GLint. This
|
|
// kills our aliasing trick for extension functions and thus would force us to
|
|
// supply two different Shader class implementations or introduce other
|
|
// wrappers. OS X only supports GL contexts right now anyway (at least
|
|
// according to SDL2 sources), thus it is not much of an issue.
|
|
#if defined(MACOSX) && (!defined(USE_GLES_MODE) || USE_GLES_MODE != 0)
|
|
//#warning "Only forced OpenGL mode is supported on Mac OS X. Overriding settings."
|
|
#undef USE_GLES_MODE
|
|
#define USE_GLES_MODE 0
|
|
#endif
|
|
|
|
// We allow to force GL or GLES modes on compile time.
|
|
// For this the USE_GLES_MODE define is used. The following values represent
|
|
// the given selection choices:
|
|
// 0 - Force OpenGL context
|
|
// 1 - Force OpenGL ES context
|
|
// 2 - Force OpenGL ES 2.0 context
|
|
#ifdef USE_GLES_MODE
|
|
#define USE_FORCED_GL (USE_GLES_MODE == 0)
|
|
#define USE_FORCED_GLES (USE_GLES_MODE == 1)
|
|
#define USE_FORCED_GLES2 (USE_GLES_MODE == 2)
|
|
#else
|
|
#define USE_FORCED_GL 0
|
|
#define USE_FORCED_GLES 0
|
|
#define USE_FORCED_GLES2 0
|
|
#endif
|
|
|
|
// Don't include any OpenGL stuff if we didn't enable it
|
|
#ifdef USE_OPENGL
|
|
#ifdef USE_GLAD
|
|
|
|
#include "graphics/opengl/glad.h"
|
|
|
|
#elif USE_FORCED_GLES2
|
|
|
|
#define GL_GLEXT_PROTOTYPES
|
|
#if defined(IPHONE)
|
|
#include <OpenGLES/ES2/gl.h>
|
|
#include <OpenGLES/ES2/glext.h>
|
|
#else
|
|
#include <GLES2/gl2.h>
|
|
#include <GLES2/gl2ext.h>
|
|
#endif
|
|
#undef GL_GLEXT_PROTOTYPES
|
|
|
|
#ifndef GL_BGRA
|
|
#define GL_BGRA GL_BGRA_EXT
|
|
#endif
|
|
|
|
#if !defined(GL_UNPACK_ROW_LENGTH)
|
|
// The Android SDK does not declare GL_UNPACK_ROW_LENGTH_EXT
|
|
#define GL_UNPACK_ROW_LENGTH 0x0CF2
|
|
#endif
|
|
|
|
#if !defined(GL_MAX_SAMPLES)
|
|
// The Android SDK and SDL1 don't declare GL_MAX_SAMPLES
|
|
#define GL_MAX_SAMPLES 0x8D57
|
|
#endif
|
|
|
|
#endif
|
|
#endif
|
|
|
|
#endif
|