diff options
Diffstat (limited to 'src/effects/shaders_ng/desaturate.frag')
-rw-r--r-- | src/effects/shaders_ng/desaturate.frag | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/effects/shaders_ng/desaturate.frag b/src/effects/shaders_ng/desaturate.frag new file mode 100644 index 0000000..b54b3ac --- /dev/null +++ b/src/effects/shaders_ng/desaturate.frag @@ -0,0 +1,21 @@ +#version 440 + +layout(location = 0) in vec2 qt_TexCoord0; +layout(location = 0) out vec4 fragColor; + +layout(std140, binding = 0) uniform buf { + // qt_Matrix and qt_Opacity must always be both present + // if the built-in vertex shader is used. + mat4 qt_Matrix; + float qt_Opacity; + float desaturation; +}; + +layout(binding = 1) uniform sampler2D source; + +void main(void) +{ + vec4 textureColor = texture(source, qt_TexCoord0.st); + float grayColor = (textureColor.r + textureColor.g + textureColor.b) / 3.0; + fragColor = mix(textureColor, vec4(vec3(grayColor), textureColor.a), desaturation) * qt_Opacity; +} |