varying highp vec2 qt_TexCoord0; | |
uniform lowp float qt_Opacity; | |
uniform highp sampler2D source; | |
uniform lowp vec4 color; | |
uniform highp float horizontalOffset; | |
uniform highp float verticalOffset; | |
void main(void) { | |
highp vec2 pos = qt_TexCoord0 - vec2(horizontalOffset, verticalOffset); | |
lowp float ea = step(0.0, pos.x) * step(0.0, pos.y) * step(pos.x, 1.0) * step(pos.y, 1.0); | |
lowp float eb = 1.0 - ea; | |
gl_FragColor = (eb * color + ea * color * (1.0 - texture2D(source, pos).a)) * qt_Opacity; | |
} |