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	GLuint ui;
 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	GLuint uivec2[2];
 36	GLuint uivec3[3];
 37	GLuint uivec4[4];
 38	GLfloat fmat2x2[4];
 39	GLfloat fmat2x3[6];
 40	GLfloat fmat2x4[8];
 41	GLfloat fmat3x2[6];
 42	GLfloat fmat3x3[9];
 43	GLfloat fmat3x4[12];
 44	GLfloat fmat4x2[8];
 45	GLfloat fmat4x3[12];
 46	GLfloat fmat4x4[16];
 47};
 48
 49struct GBAGLES2Uniform {
 50	const char* name;
 51	GLenum type;
 52	union GBAGLES2UniformValue value;
 53	GLuint location;
 54};
 55
 56struct GBAGLES2Shader {
 57	unsigned width;
 58	unsigned height;
 59	bool filter;
 60	bool blend;
 61	GLuint tex;
 62	GLuint fbo;
 63	GLuint fragmentShader;
 64	GLuint vertexShader;
 65	GLuint program;
 66	GLuint texLocation;
 67	GLuint positionLocation;
 68
 69	struct GBAGLES2Uniform* uniforms;
 70	size_t nUniforms;
 71};
 72
 73struct GBAGLES2Context {
 74	struct VideoBackend d;
 75
 76	GLuint tex;
 77	GLuint texLocation;
 78	GLuint positionLocation;
 79
 80	struct GBAGLES2Shader initialShader;
 81	struct GBAGLES2Shader finalShader;
 82
 83	struct GBAGLES2Shader* shaders;
 84	size_t nShaders;
 85};
 86
 87struct GBAGLES2ShaderMetadata {
 88	const char* name;
 89	const char* author;
 90	const char* description;
 91};
 92
 93void GBAGLES2ContextCreate(struct GBAGLES2Context*);
 94
 95void GBAGLES2ShaderInit(struct GBAGLES2Shader*, const char* vs, const char* fs, int width, int height, struct GBAGLES2Uniform* uniforms, size_t nUniforms);
 96void GBAGLES2ShaderDeinit(struct GBAGLES2Shader*);
 97void GBAGLES2ShaderAttach(struct GBAGLES2Context*, struct GBAGLES2Shader*, size_t nShaders);
 98void GBAGLES2ShaderDetach(struct GBAGLES2Context*);
 99
100struct VDir;
101bool GBAGLES2ShaderLoad(struct GBAGLES2Shader**, size_t* nShaders, struct GBAGLES2ShaderMetadata*, struct VDir*);
102void GBAGLES2ShaderFree(struct GBAGLES2Shader*, size_t nShaders);
103
104#endif