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49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
#define SHADER_GLOBAL_VARS "uniform mat4 uMatrixProj; \
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uniform mat4 uLayerQuadTransform; \
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uniform mat4 uLayerTransform; \
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uniform vec4 uRenderTargetOffset; \
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uniform vec4 uRenderColor; \
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uniform float uLayerOpacity; \
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\
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uniform sampler2D uLayerTexture; \
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uniform sampler2D uYTexture; \
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uniform sampler2D uCbTexture; \
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uniform sampler2D uCrTexture; \
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varying vec2 vTextureCoordinate;"
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static const GLchar *sVertexShader = SHADER_GLOBAL_VARS "attribute vec4 aVertex; \
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void main() \
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{ \
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vec4 finalPosition = aVertex; \
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finalPosition = uLayerQuadTransform * finalPosition; \
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finalPosition = uLayerTransform * finalPosition; \
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finalPosition = finalPosition - uRenderTargetOffset; \
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finalPosition = uMatrixProj * finalPosition; \
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gl_Position = finalPosition; \
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vTextureCoordinate = vec2(aVertex); \
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}";
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static const GLchar *sRGBLayerPS = SHADER_GLOBAL_VARS "void main() \
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{ \
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gl_FragColor = texture2D(uLayerTexture, vTextureCoordinate) * uLayerOpacity; \
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}";
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static const GLchar *sColorLayerPS = SHADER_GLOBAL_VARS "void main() \
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{ \
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gl_FragColor = uRenderColor; \
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}";
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static const GLchar *sYUVLayerPS = SHADER_GLOBAL_VARS "void main() \
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{ \
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vec4 yuv; \
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vec4 color; \
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yuv.r = texture2D(uCrTexture, vTextureCoordinate).r - 0.5; \
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yuv.g = texture2D(uYTexture, vTextureCoordinate).r - 0.0625; \
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yuv.b = texture2D(uCbTexture, vTextureCoordinate).r - 0.5; \
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color.r = yuv.g * 1.164 + yuv.r * 1.596; \
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color.g = yuv.g * 1.164 - 0.813 * yuv.r - 0.391 * yuv.b; \
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color.b = yuv.g * 1.164 + yuv.b * 2.018; \
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color.a = 1.0; \
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gl_FragColor = color * uLayerOpacity; \
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}";
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