diff options
Diffstat (limited to 'src/effects/shaders/gaussianinnershadow.frag')
-rw-r--r-- | src/effects/shaders/gaussianinnershadow.frag | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/effects/shaders/gaussianinnershadow.frag b/src/effects/shaders/gaussianinnershadow.frag new file mode 100644 index 0000000..c9f57a6 --- /dev/null +++ b/src/effects/shaders/gaussianinnershadow.frag @@ -0,0 +1,17 @@ +uniform highp sampler2D original; +uniform highp sampler2D shadow; +uniform lowp float qt_Opacity; +uniform highp float spread; +uniform lowp vec4 color; +varying highp vec2 qt_TexCoord0; + +highp float linearstep(highp float e0, highp float e1, highp float x) { + return clamp((x - e0) / (e1 - e0), 0.0, 1.0); +} + +void main(void) { + lowp vec4 originalColor = texture2D(original, qt_TexCoord0); + lowp vec4 shadowColor = texture2D(shadow, qt_TexCoord0); + shadowColor.rgb = mix(originalColor.rgb, color.rgb * originalColor.a, linearstep(0.0, spread, shadowColor.a)); + gl_FragColor = vec4(shadowColor.rgb, originalColor.a) * originalColor.a * qt_Opacity; +} |