diff options
Diffstat (limited to 'system/shaders/convolution-4x4.glsl')
| -rw-r--r-- | system/shaders/convolution-4x4.glsl | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/system/shaders/convolution-4x4.glsl b/system/shaders/convolution-4x4.glsl index 1b6358b0df..70813f45cb 100644 --- a/system/shaders/convolution-4x4.glsl +++ b/system/shaders/convolution-4x4.glsl @@ -1,23 +1,20 @@ +#version 130 + uniform sampler2D img; uniform sampler1D kernelTex; uniform vec2 stepxy; uniform float m_stretch; - -//nvidia's half is a 16 bit float and can bring some speed improvements -//without affecting quality -#ifndef __GLSL_CG_DATA_TYPES - #define half float - #define half3 vec3 - #define half4 vec4 -#endif +out vec4 gl_FragColor; +in vec4 gl_TexCoord[]; +in vec4 gl_Color; #if (HAS_FLOAT_TEXTURE) -half4 weight(float pos) +vec4 weight(float pos) { return texture(kernelTex, pos); } #else -half4 weight(float pos) +vec4 weight(float pos) { return texture(kernelTex, pos) * 2.0 - 1.0; } @@ -36,7 +33,7 @@ vec2 stretch(vec2 pos) #endif } -half3 line (vec2 pos, const int yoffset, half4 linetaps) +vec3 line (vec2 pos, const int yoffset, vec4 linetaps) { return textureOffset(img, pos, ivec2(-1, yoffset)).rgb * linetaps.r + @@ -50,8 +47,8 @@ void main() vec2 pos = stretch(gl_TexCoord[0].xy); vec2 f = fract(pos / stepxy); - half4 linetaps = weight(1.0 - f.x); - half4 columntaps = weight(1.0 - f.y); + vec4 linetaps = weight(1.0 - f.x); + vec4 columntaps = weight(1.0 - f.y); //make sure all taps added together is exactly 1.0, otherwise some (very small) distortion can occur linetaps /= linetaps.r + linetaps.g + linetaps.b + linetaps.a; |