diff options
Diffstat (limited to 'examples/quick/shadereffects/content/shaders/rhi/outline.frag')
-rw-r--r-- | examples/quick/shadereffects/content/shaders/rhi/outline.frag | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/examples/quick/shadereffects/content/shaders/rhi/outline.frag b/examples/quick/shadereffects/content/shaders/rhi/outline.frag new file mode 100644 index 0000000000..26df69c5fe --- /dev/null +++ b/examples/quick/shadereffects/content/shaders/rhi/outline.frag @@ -0,0 +1,24 @@ +#version 440 + +layout(location = 0) in vec2 qt_TexCoord0; +layout(location = 0) out vec4 fragColor; + +layout(binding = 1) uniform sampler2D source; + +layout(std140, binding = 0) uniform buf { + mat4 qt_Matrix; + float qt_Opacity; + vec2 delta; +} ubuf; + +void main() +{ + vec4 tl = texture(source, qt_TexCoord0 - ubuf.delta); + vec4 tr = texture(source, qt_TexCoord0 + vec2(ubuf.delta.x, -ubuf.delta.y)); + vec4 bl = texture(source, qt_TexCoord0 - vec2(ubuf.delta.x, -ubuf.delta.y)); + vec4 br = texture(source, qt_TexCoord0 + ubuf.delta); + vec4 gx = (tl + bl) - (tr + br); + vec4 gy = (tl + tr) - (bl + br); + fragColor.xyz = vec3(0.); + fragColor.w = clamp(dot(sqrt(gx * gx + gy * gy), vec4(1.)), 0., 1.) * ubuf.qt_Opacity; +} |