1 /*
2   Simple DirectMedia Layer
3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4 
5   This software is provided 'as-is', without any express or implied
6   warranty.  In no event will the authors be held liable for any damages
7   arising from the use of this software.
8 
9   Permission is granted to anyone to use this software for any purpose,
10   including commercial applications, and to alter it and redistribute it
11   freely, subject to the following restrictions:
12 
13   1. The origin of this software must not be misrepresented; you must not
14      claim that you wrote the original software. If you use this software
15      in a product, an acknowledgment in the product documentation would be
16      appreciated but is not required.
17   2. Altered source versions must be plainly marked as such, and must not be
18      misrepresented as being the original software.
19   3. This notice may not be removed or altered from any source distribution.
20 */
21 
22 #ifndef SDL_shaders_gl_h_
23 #define SDL_shaders_gl_h_
24 
25 #include "../../SDL_internal.h"
26 
27 /* OpenGL shader implementation */
28 
29 typedef enum {
30     SHADER_INVALID = -1,
31     SHADER_NONE,
32     SHADER_SOLID,
33     SHADER_RGB,
34     SHADER_RGBA,
35     SHADER_YUV_JPEG,
36     SHADER_YUV_BT601,
37     SHADER_YUV_BT709,
38     SHADER_NV12_JPEG,
39     SHADER_NV12_BT601,
40     SHADER_NV12_BT709,
41     SHADER_NV21_JPEG,
42     SHADER_NV21_BT601,
43     SHADER_NV21_BT709,
44     NUM_SHADERS
45 } GL_Shader;
46 
47 typedef struct GL_ShaderContext GL_ShaderContext;
48 
49 extern GL_ShaderContext * GL_CreateShaderContext(void);
50 extern void GL_SelectShader(GL_ShaderContext *ctx, GL_Shader shader);
51 extern void GL_DestroyShaderContext(GL_ShaderContext *ctx);
52 
53 #endif /* SDL_shaders_gl_h_ */
54 
55 /* vi: set ts=4 sw=4 expandtab: */
56