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#ifdef USE_EPOXY
 10#include <epoxy/gl.h>
 11#elif defined(BUILD_GL)
 12#ifdef __APPLE__
 13#include <OpenGL/gl3.h>
 14#else
 15#define GL_GLEXT_PROTOTYPES
 16#include <GL/gl.h>
 17#include <GL/glext.h>
 18#endif
 19#else
 20#include <GLES2/gl2.h>
 21#endif
 22
 23#include "platform/video-backend.h"
 24
 25union GBAGLES2UniformValue {
 26	GLfloat f;
 27	GLint i;
 28	GLboolean b;
 29	GLfloat fvec2[2];
 30	GLfloat fvec3[3];
 31	GLfloat fvec4[4];
 32	GLint ivec2[2];
 33	GLint ivec3[3];
 34	GLint ivec4[4];
 35	GLboolean bvec2[2];
 36	GLboolean bvec3[3];
 37	GLboolean bvec4[4];
 38	GLfloat fmat2x2[4];
 39	GLfloat fmat3x3[9];
 40	GLfloat fmat4x4[16];
 41};
 42
 43struct GBAGLES2Uniform {
 44	const char* name;
 45	GLenum type;
 46	union GBAGLES2UniformValue value;
 47	GLuint location;
 48	union GBAGLES2UniformValue min;
 49	union GBAGLES2UniformValue max;
 50	const char* readableName;
 51};
 52
 53struct GBAGLES2Shader {
 54	unsigned width;
 55	unsigned height;
 56	bool filter;
 57	bool blend;
 58	GLuint tex;
 59	GLuint fbo;
 60	GLuint fragmentShader;
 61	GLuint vertexShader;
 62	GLuint program;
 63	GLuint texLocation;
 64	GLuint positionLocation;
 65
 66	struct GBAGLES2Uniform* uniforms;
 67	size_t nUniforms;
 68};
 69
 70struct GBAGLES2Context {
 71	struct VideoBackend d;
 72
 73	GLuint tex;
 74	GLuint texLocation;
 75	GLuint positionLocation;
 76
 77	struct GBAGLES2Shader initialShader;
 78	struct GBAGLES2Shader finalShader;
 79
 80	struct GBAGLES2Shader* shaders;
 81	size_t nShaders;
 82};
 83
 84struct GBAGLES2ShaderMetadata {
 85	const char* name;
 86	const char* author;
 87	const char* description;
 88};
 89
 90void GBAGLES2ContextCreate(struct GBAGLES2Context*);
 91
 92void GBAGLES2ShaderInit(struct GBAGLES2Shader*, const char* vs, const char* fs, int width, int height, struct GBAGLES2Uniform* uniforms, size_t nUniforms);
 93void GBAGLES2ShaderDeinit(struct GBAGLES2Shader*);
 94void GBAGLES2ShaderAttach(struct GBAGLES2Context*, struct GBAGLES2Shader*, size_t nShaders);
 95void GBAGLES2ShaderDetach(struct GBAGLES2Context*);
 96
 97struct VDir;
 98bool GBAGLES2ShaderLoad(struct GBAGLES2Shader**, size_t* nShaders, struct GBAGLES2ShaderMetadata*, struct VDir*);
 99void GBAGLES2ShaderFree(struct GBAGLES2Shader*, size_t nShaders);
100
101#endif