1/* Copyright (c) 2013-2015 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#ifndef GLES2_H
  7#define GLES2_H
  8
  9#include <mgba-util/common.h>
 10
 11CXX_GUARD_START
 12
 13#ifdef USE_EPOXY
 14#include <epoxy/gl.h>
 15#elif defined(BUILD_GL)
 16#ifdef __APPLE__
 17#include <OpenGL/gl3.h>
 18#else
 19#define GL_GLEXT_PROTOTYPES
 20#include <GL/gl.h>
 21#include <GL/glext.h>
 22#endif
 23#else
 24#include <GLES2/gl2.h>
 25#endif
 26
 27#include "platform/video-backend.h"
 28
 29union mGLES2UniformValue {
 30	GLfloat f;
 31	GLint i;
 32	GLboolean b;
 33	GLfloat fvec2[2];
 34	GLfloat fvec3[3];
 35	GLfloat fvec4[4];
 36	GLint ivec2[2];
 37	GLint ivec3[3];
 38	GLint ivec4[4];
 39	GLboolean bvec2[2];
 40	GLboolean bvec3[3];
 41	GLboolean bvec4[4];
 42	GLfloat fmat2x2[4];
 43	GLfloat fmat3x3[9];
 44	GLfloat fmat4x4[16];
 45};
 46
 47struct mGLES2Uniform {
 48	const char* name;
 49	GLenum type;
 50	union mGLES2UniformValue value;
 51	GLuint location;
 52	union mGLES2UniformValue min;
 53	union mGLES2UniformValue max;
 54	const char* readableName;
 55};
 56
 57struct mGLES2Shader {
 58	int width;
 59	int height;
 60	bool integerScaling;
 61	bool filter;
 62	bool blend;
 63	GLuint tex;
 64	GLuint fbo;
 65	GLuint fragmentShader;
 66	GLuint vertexShader;
 67	GLuint program;
 68	GLuint texLocation;
 69	GLuint texSizeLocation;
 70	GLuint positionLocation;
 71
 72	struct mGLES2Uniform* uniforms;
 73	size_t nUniforms;
 74};
 75
 76struct mGLES2Context {
 77	struct VideoBackend d;
 78
 79	GLuint tex;
 80	GLuint texLocation;
 81	GLuint positionLocation;
 82
 83	struct mGLES2Shader initialShader;
 84	struct mGLES2Shader finalShader;
 85
 86	struct mGLES2Shader* shaders;
 87	size_t nShaders;
 88};
 89
 90void mGLES2ContextCreate(struct mGLES2Context*);
 91
 92void mGLES2ShaderInit(struct mGLES2Shader*, const char* vs, const char* fs, int width, int height, bool integerScaling, struct mGLES2Uniform* uniforms, size_t nUniforms);
 93void mGLES2ShaderDeinit(struct mGLES2Shader*);
 94void mGLES2ShaderAttach(struct mGLES2Context*, struct mGLES2Shader*, size_t nShaders);
 95void mGLES2ShaderDetach(struct mGLES2Context*);
 96
 97struct VDir;
 98bool mGLES2ShaderLoad(struct VideoShader*, struct VDir*);
 99void mGLES2ShaderFree(struct VideoShader*);
100
101CXX_GUARD_END
102
103#endif