diff options
Diffstat (limited to 'src/quick/scenegraph/shaders/smoothtexture_core.vert')
-rw-r--r-- | src/quick/scenegraph/shaders/smoothtexture_core.vert | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/quick/scenegraph/shaders/smoothtexture_core.vert b/src/quick/scenegraph/shaders/smoothtexture_core.vert new file mode 100644 index 0000000000..a2489a39c5 --- /dev/null +++ b/src/quick/scenegraph/shaders/smoothtexture_core.vert @@ -0,0 +1,54 @@ +#version 150 core + +in vec4 vertex; +in vec2 multiTexCoord; +in vec2 vertexOffset; +in vec2 texCoordOffset; + +out vec2 texCoord; +out float vertexOpacity; + +uniform vec2 pixelSize; +uniform mat4 qt_Matrix; +uniform float opacity; + +void main() +{ + vec4 pos = qt_Matrix * vertex; + gl_Position = pos; + texCoord = multiTexCoord; + + if (vertexOffset.x != 0.) { + vec4 delta = qt_Matrix[0] * vertexOffset.x; + vec2 dir = delta.xy * pos.w - pos.xy * delta.w; + vec2 ndir = .5 * pixelSize * normalize(dir / pixelSize); + dir -= ndir * delta.w * pos.w; + float numerator = dot(dir, ndir * pos.w * pos.w); + float scale = 0.0; + if (numerator < 0.0) + scale = 1.0; + else + scale = min(1.0, numerator / dot(dir, dir)); + gl_Position += scale * delta; + texCoord.x += scale * texCoordOffset.x; + } + + if (vertexOffset.y != 0.) { + vec4 delta = qt_Matrix[1] * vertexOffset.y; + vec2 dir = delta.xy * pos.w - pos.xy * delta.w; + vec2 ndir = .5 * pixelSize * normalize(dir / pixelSize); + dir -= ndir * delta.w * pos.w; + float numerator = dot(dir, ndir * pos.w * pos.w); + float scale = 0.0; + if (numerator < 0.0) + scale = 1.0; + else + scale = min(1.0, numerator / dot(dir, dir)); + gl_Position += scale * delta; + texCoord.y += scale * texCoordOffset.y; + } + + bool onEdge = any(notEqual(vertexOffset, vec2(0.))); + bool outerEdge = all(equal(texCoordOffset, vec2(0.))); + vertexOpacity = onEdge && outerEdge ? 0. : opacity; +}
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