diff options
Diffstat (limited to 'Source/external/SDL2/src/render/opengles2/SDL_shaders_gles2.c')
| -rw-r--r-- | Source/external/SDL2/src/render/opengles2/SDL_shaders_gles2.c | 573 |
1 files changed, 573 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/render/opengles2/SDL_shaders_gles2.c b/Source/external/SDL2/src/render/opengles2/SDL_shaders_gles2.c new file mode 100644 index 0000000..f428a49 --- /dev/null +++ b/Source/external/SDL2/src/render/opengles2/SDL_shaders_gles2.c @@ -0,0 +1,573 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "../../SDL_internal.h" + +#if SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED + +#include "SDL_video.h" +#include "SDL_opengles2.h" +#include "SDL_shaders_gles2.h" +#include "SDL_stdinc.h" + +/************************************************************************************************* + * Vertex/fragment shader source * + *************************************************************************************************/ +/* Notes on a_angle: + * It is a vector containing sin and cos for rotation matrix + * To get correct rotation for most cases when a_angle is disabled cos + value is decremented by 1.0 to get proper output with 0.0 which is + default value +*/ +static const Uint8 GLES2_VertexSrc_Default_[] = " \ + uniform mat4 u_projection; \ + attribute vec2 a_position; \ + attribute vec2 a_texCoord; \ + attribute vec2 a_angle; \ + attribute vec2 a_center; \ + varying vec2 v_texCoord; \ + \ + void main() \ + { \ + float s = a_angle[0]; \ + float c = a_angle[1] + 1.0; \ + mat2 rotationMatrix = mat2(c, -s, s, c); \ + vec2 position = rotationMatrix * (a_position - a_center) + a_center; \ + v_texCoord = a_texCoord; \ + gl_Position = u_projection * vec4(position, 0.0, 1.0);\ + gl_PointSize = 1.0; \ + } \ +"; + +static const Uint8 GLES2_FragmentSrc_SolidSrc_[] = " \ + precision mediump float; \ + uniform vec4 u_color; \ + \ + void main() \ + { \ + gl_FragColor = u_color; \ + } \ +"; + +static const Uint8 GLES2_FragmentSrc_TextureABGRSrc_[] = " \ + precision mediump float; \ + uniform sampler2D u_texture; \ + uniform vec4 u_modulation; \ + varying vec2 v_texCoord; \ + \ + void main() \ + { \ + gl_FragColor = texture2D(u_texture, v_texCoord); \ + gl_FragColor *= u_modulation; \ + } \ +"; + +/* ARGB to ABGR conversion */ +static const Uint8 GLES2_FragmentSrc_TextureARGBSrc_[] = " \ + precision mediump float; \ + uniform sampler2D u_texture; \ + uniform vec4 u_modulation; \ + varying vec2 v_texCoord; \ + \ + void main() \ + { \ + vec4 abgr = texture2D(u_texture, v_texCoord); \ + gl_FragColor = abgr; \ + gl_FragColor.r = abgr.b; \ + gl_FragColor.b = abgr.r; \ + gl_FragColor *= u_modulation; \ + } \ +"; + +/* RGB to ABGR conversion */ +static const Uint8 GLES2_FragmentSrc_TextureRGBSrc_[] = " \ + precision mediump float; \ + uniform sampler2D u_texture; \ + uniform vec4 u_modulation; \ + varying vec2 v_texCoord; \ + \ + void main() \ + { \ + vec4 abgr = texture2D(u_texture, v_texCoord); \ + gl_FragColor = abgr; \ + gl_FragColor.r = abgr.b; \ + gl_FragColor.b = abgr.r; \ + gl_FragColor.a = 1.0; \ + gl_FragColor *= u_modulation; \ + } \ +"; + +/* BGR to ABGR conversion */ +static const Uint8 GLES2_FragmentSrc_TextureBGRSrc_[] = " \ + precision mediump float; \ + uniform sampler2D u_texture; \ + uniform vec4 u_modulation; \ + varying vec2 v_texCoord; \ + \ + void main() \ + { \ + vec4 abgr = texture2D(u_texture, v_texCoord); \ + gl_FragColor = abgr; \ + gl_FragColor.a = 1.0; \ + gl_FragColor *= u_modulation; \ + } \ +"; + +#define JPEG_SHADER_CONSTANTS \ +"// YUV offset \n" \ +"const vec3 offset = vec3(0, -0.501960814, -0.501960814);\n" \ +"\n" \ +"// RGB coefficients \n" \ +"const mat3 matrix = mat3( 1, 1, 1,\n" \ +" 0, -0.3441, 1.772,\n" \ +" 1.402, -0.7141, 0);\n" \ + +#define BT601_SHADER_CONSTANTS \ +"// YUV offset \n" \ +"const vec3 offset = vec3(-0.0627451017, -0.501960814, -0.501960814);\n" \ +"\n" \ +"// RGB coefficients \n" \ +"const mat3 matrix = mat3( 1.1644, 1.1644, 1.1644,\n" \ +" 0, -0.3918, 2.0172,\n" \ +" 1.596, -0.813, 0);\n" \ + +#define BT709_SHADER_CONSTANTS \ +"// YUV offset \n" \ +"const vec3 offset = vec3(-0.0627451017, -0.501960814, -0.501960814);\n" \ +"\n" \ +"// RGB coefficients \n" \ +"const mat3 matrix = mat3( 1.1644, 1.1644, 1.1644,\n" \ +" 0, -0.2132, 2.1124,\n" \ +" 1.7927, -0.5329, 0);\n" \ + + +#define YUV_SHADER_PROLOGUE \ +"precision mediump float;\n" \ +"uniform sampler2D u_texture;\n" \ +"uniform sampler2D u_texture_u;\n" \ +"uniform sampler2D u_texture_v;\n" \ +"uniform vec4 u_modulation;\n" \ +"varying vec2 v_texCoord;\n" \ +"\n" \ + +#define YUV_SHADER_BODY \ +"\n" \ +"void main()\n" \ +"{\n" \ +" mediump vec3 yuv;\n" \ +" lowp vec3 rgb;\n" \ +"\n" \ +" // Get the YUV values \n" \ +" yuv.x = texture2D(u_texture, v_texCoord).r;\n" \ +" yuv.y = texture2D(u_texture_u, v_texCoord).r;\n" \ +" yuv.z = texture2D(u_texture_v, v_texCoord).r;\n" \ +"\n" \ +" // Do the color transform \n" \ +" yuv += offset;\n" \ +" rgb = matrix * yuv;\n" \ +"\n" \ +" // That was easy. :) \n" \ +" gl_FragColor = vec4(rgb, 1);\n" \ +" gl_FragColor *= u_modulation;\n" \ +"}" \ + +#define NV12_SHADER_BODY \ +"\n" \ +"void main()\n" \ +"{\n" \ +" mediump vec3 yuv;\n" \ +" lowp vec3 rgb;\n" \ +"\n" \ +" // Get the YUV values \n" \ +" yuv.x = texture2D(u_texture, v_texCoord).r;\n" \ +" yuv.yz = texture2D(u_texture_u, v_texCoord).ra;\n" \ +"\n" \ +" // Do the color transform \n" \ +" yuv += offset;\n" \ +" rgb = matrix * yuv;\n" \ +"\n" \ +" // That was easy. :) \n" \ +" gl_FragColor = vec4(rgb, 1);\n" \ +" gl_FragColor *= u_modulation;\n" \ +"}" \ + +#define NV21_SHADER_BODY \ +"\n" \ +"void main()\n" \ +"{\n" \ +" mediump vec3 yuv;\n" \ +" lowp vec3 rgb;\n" \ +"\n" \ +" // Get the YUV values \n" \ +" yuv.x = texture2D(u_texture, v_texCoord).r;\n" \ +" yuv.yz = texture2D(u_texture_u, v_texCoord).ar;\n" \ +"\n" \ +" // Do the color transform \n" \ +" yuv += offset;\n" \ +" rgb = matrix * yuv;\n" \ +"\n" \ +" // That was easy. :) \n" \ +" gl_FragColor = vec4(rgb, 1);\n" \ +" gl_FragColor *= u_modulation;\n" \ +"}" \ + +/* YUV to ABGR conversion */ +static const Uint8 GLES2_FragmentSrc_TextureYUVJPEGSrc_[] = \ + YUV_SHADER_PROLOGUE \ + JPEG_SHADER_CONSTANTS \ + YUV_SHADER_BODY \ +; +static const Uint8 GLES2_FragmentSrc_TextureYUVBT601Src_[] = \ + YUV_SHADER_PROLOGUE \ + BT601_SHADER_CONSTANTS \ + YUV_SHADER_BODY \ +; +static const Uint8 GLES2_FragmentSrc_TextureYUVBT709Src_[] = \ + YUV_SHADER_PROLOGUE \ + BT709_SHADER_CONSTANTS \ + YUV_SHADER_BODY \ +; + +/* NV12 to ABGR conversion */ +static const Uint8 GLES2_FragmentSrc_TextureNV12JPEGSrc_[] = \ + YUV_SHADER_PROLOGUE \ + JPEG_SHADER_CONSTANTS \ + NV12_SHADER_BODY \ +; +static const Uint8 GLES2_FragmentSrc_TextureNV12BT601Src_[] = \ + YUV_SHADER_PROLOGUE \ + BT601_SHADER_CONSTANTS \ + NV12_SHADER_BODY \ +; +static const Uint8 GLES2_FragmentSrc_TextureNV12BT709Src_[] = \ + YUV_SHADER_PROLOGUE \ + BT709_SHADER_CONSTANTS \ + NV12_SHADER_BODY \ +; + +/* NV21 to ABGR conversion */ +static const Uint8 GLES2_FragmentSrc_TextureNV21JPEGSrc_[] = \ + YUV_SHADER_PROLOGUE \ + JPEG_SHADER_CONSTANTS \ + NV21_SHADER_BODY \ +; +static const Uint8 GLES2_FragmentSrc_TextureNV21BT601Src_[] = \ + YUV_SHADER_PROLOGUE \ + BT601_SHADER_CONSTANTS \ + NV21_SHADER_BODY \ +; +static const Uint8 GLES2_FragmentSrc_TextureNV21BT709Src_[] = \ + YUV_SHADER_PROLOGUE \ + BT709_SHADER_CONSTANTS \ + NV21_SHADER_BODY \ +; + +/* Custom Android video format texture */ +static const Uint8 GLES2_FragmentSrc_TextureExternalOESSrc_[] = " \ + #extension GL_OES_EGL_image_external : require\n\ + precision mediump float; \ + uniform samplerExternalOES u_texture; \ + uniform vec4 u_modulation; \ + varying vec2 v_texCoord; \ + \ + void main() \ + { \ + gl_FragColor = texture2D(u_texture, v_texCoord); \ + gl_FragColor *= u_modulation; \ + } \ +"; + +static const GLES2_ShaderInstance GLES2_VertexSrc_Default = { + GL_VERTEX_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_VertexSrc_Default_), + GLES2_VertexSrc_Default_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_SolidSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_SolidSrc_), + GLES2_FragmentSrc_SolidSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureABGRSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureABGRSrc_), + GLES2_FragmentSrc_TextureABGRSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureARGBSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureARGBSrc_), + GLES2_FragmentSrc_TextureARGBSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureRGBSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureRGBSrc_), + GLES2_FragmentSrc_TextureRGBSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureBGRSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureBGRSrc_), + GLES2_FragmentSrc_TextureBGRSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureYUVJPEGSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureYUVJPEGSrc_), + GLES2_FragmentSrc_TextureYUVJPEGSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureYUVBT601Src = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureYUVBT601Src_), + GLES2_FragmentSrc_TextureYUVBT601Src_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureYUVBT709Src = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureYUVBT709Src_), + GLES2_FragmentSrc_TextureYUVBT709Src_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureNV12JPEGSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureNV12JPEGSrc_), + GLES2_FragmentSrc_TextureNV12JPEGSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureNV12BT601Src = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureNV12BT601Src_), + GLES2_FragmentSrc_TextureNV12BT601Src_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureNV21BT709Src = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureNV21BT709Src_), + GLES2_FragmentSrc_TextureNV21BT709Src_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureNV21JPEGSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureNV21JPEGSrc_), + GLES2_FragmentSrc_TextureNV21JPEGSrc_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureNV21BT601Src = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureNV21BT601Src_), + GLES2_FragmentSrc_TextureNV21BT601Src_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureNV12BT709Src = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureNV12BT709Src_), + GLES2_FragmentSrc_TextureNV12BT709Src_ +}; + +static const GLES2_ShaderInstance GLES2_FragmentSrc_TextureExternalOESSrc = { + GL_FRAGMENT_SHADER, + GLES2_SOURCE_SHADER, + sizeof(GLES2_FragmentSrc_TextureExternalOESSrc_), + GLES2_FragmentSrc_TextureExternalOESSrc_ +}; + + +/************************************************************************************************* + * Vertex/fragment shader definitions * + *************************************************************************************************/ + +static GLES2_Shader GLES2_VertexShader_Default = { + 1, + { + &GLES2_VertexSrc_Default + } +}; + +static GLES2_Shader GLES2_FragmentShader_SolidSrc = { + 1, + { + &GLES2_FragmentSrc_SolidSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureABGRSrc = { + 1, + { + &GLES2_FragmentSrc_TextureABGRSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureARGBSrc = { + 1, + { + &GLES2_FragmentSrc_TextureARGBSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureRGBSrc = { + 1, + { + &GLES2_FragmentSrc_TextureRGBSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureBGRSrc = { + 1, + { + &GLES2_FragmentSrc_TextureBGRSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureYUVJPEGSrc = { + 1, + { + &GLES2_FragmentSrc_TextureYUVJPEGSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureYUVBT601Src = { + 1, + { + &GLES2_FragmentSrc_TextureYUVBT601Src + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureYUVBT709Src = { + 1, + { + &GLES2_FragmentSrc_TextureYUVBT709Src + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureNV12JPEGSrc = { + 1, + { + &GLES2_FragmentSrc_TextureNV12JPEGSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureNV12BT601Src = { + 1, + { + &GLES2_FragmentSrc_TextureNV12BT601Src + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureNV12BT709Src = { + 1, + { + &GLES2_FragmentSrc_TextureNV12BT709Src + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureNV21JPEGSrc = { + 1, + { + &GLES2_FragmentSrc_TextureNV21JPEGSrc + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureNV21BT601Src = { + 1, + { + &GLES2_FragmentSrc_TextureNV21BT601Src + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureNV21BT709Src = { + 1, + { + &GLES2_FragmentSrc_TextureNV21BT709Src + } +}; + +static GLES2_Shader GLES2_FragmentShader_TextureExternalOESSrc = { + 1, + { + &GLES2_FragmentSrc_TextureExternalOESSrc + } +}; + + +/************************************************************************************************* + * Shader selector * + *************************************************************************************************/ + +const GLES2_Shader *GLES2_GetShader(GLES2_ShaderType type) +{ + switch (type) { + case GLES2_SHADER_VERTEX_DEFAULT: + return &GLES2_VertexShader_Default; + case GLES2_SHADER_FRAGMENT_SOLID_SRC: + return &GLES2_FragmentShader_SolidSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_ABGR_SRC: + return &GLES2_FragmentShader_TextureABGRSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_ARGB_SRC: + return &GLES2_FragmentShader_TextureARGBSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_RGB_SRC: + return &GLES2_FragmentShader_TextureRGBSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_BGR_SRC: + return &GLES2_FragmentShader_TextureBGRSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_YUV_JPEG_SRC: + return &GLES2_FragmentShader_TextureYUVJPEGSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_YUV_BT601_SRC: + return &GLES2_FragmentShader_TextureYUVBT601Src; + case GLES2_SHADER_FRAGMENT_TEXTURE_YUV_BT709_SRC: + return &GLES2_FragmentShader_TextureYUVBT709Src; + case GLES2_SHADER_FRAGMENT_TEXTURE_NV12_JPEG_SRC: + return &GLES2_FragmentShader_TextureNV12JPEGSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_NV12_BT601_SRC: + return &GLES2_FragmentShader_TextureNV12BT601Src; + case GLES2_SHADER_FRAGMENT_TEXTURE_NV12_BT709_SRC: + return &GLES2_FragmentShader_TextureNV12BT709Src; + case GLES2_SHADER_FRAGMENT_TEXTURE_NV21_JPEG_SRC: + return &GLES2_FragmentShader_TextureNV21JPEGSrc; + case GLES2_SHADER_FRAGMENT_TEXTURE_NV21_BT601_SRC: + return &GLES2_FragmentShader_TextureNV21BT601Src; + case GLES2_SHADER_FRAGMENT_TEXTURE_NV21_BT709_SRC: + return &GLES2_FragmentShader_TextureNV21BT709Src; + case GLES2_SHADER_FRAGMENT_TEXTURE_EXTERNAL_OES_SRC: + return &GLES2_FragmentShader_TextureExternalOESSrc; + default: + return NULL; + } +} + +#endif /* SDL_VIDEO_RENDER_OGL_ES2 && !SDL_RENDER_DISABLED */ + +/* vi: set ts=4 sw=4 expandtab: */ |