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
87void GBAGLES2ContextCreate(struct GBAGLES2Context*);
88
89void GBAGLES2ShaderInit(struct GBAGLES2Shader*, const char* vs, const char* fs, int width, int height, struct GBAGLES2Uniform* uniforms, size_t nUniforms);
90void GBAGLES2ShaderDeinit(struct GBAGLES2Shader*);
91void GBAGLES2ShaderAttach(struct GBAGLES2Context*, struct GBAGLES2Shader*, size_t nShaders);
92void GBAGLES2ShaderDetach(struct GBAGLES2Context*);
93
94#endif