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 integerScaling;
57	bool filter;
58	bool blend;
59	GLuint tex;
60	GLuint fbo;
61	GLuint fragmentShader;
62	GLuint vertexShader;
63	GLuint program;
64	GLuint texLocation;
65	GLuint positionLocation;
66
67	struct GBAGLES2Uniform* uniforms;
68	size_t nUniforms;
69};
70
71struct GBAGLES2Context {
72	struct VideoBackend d;
73
74	GLuint tex;
75	GLuint texLocation;
76	GLuint positionLocation;
77
78	struct GBAGLES2Shader initialShader;
79	struct GBAGLES2Shader finalShader;
80
81	struct GBAGLES2Shader* shaders;
82	size_t nShaders;
83};
84
85void GBAGLES2ContextCreate(struct GBAGLES2Context*);
86
87void GBAGLES2ShaderInit(struct GBAGLES2Shader*, const char* vs, const char* fs, int width, int height, bool integerScaling, struct GBAGLES2Uniform* uniforms, size_t nUniforms);
88void GBAGLES2ShaderDeinit(struct GBAGLES2Shader*);
89void GBAGLES2ShaderAttach(struct GBAGLES2Context*, struct GBAGLES2Shader*, size_t nShaders);
90void GBAGLES2ShaderDetach(struct GBAGLES2Context*);
91
92struct VDir;
93bool GBAGLES2ShaderLoad(struct VideoShader*, struct VDir*);
94void GBAGLES2ShaderFree(struct VideoShader*);
95
96#endif