e3cc3f7841
This allows putting any number of color stops into the buffer, so fallbacks with too many stops are no longer necessary.
44 lines
1.0 KiB
GLSL
44 lines
1.0 KiB
GLSL
#version 450
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#include "common.vert.glsl"
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#include "rect.vert.glsl"
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struct ColorStop {
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float offset;
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vec4 color;
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};
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layout(location = 0) in vec4 inRect;
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layout(location = 1) in vec2 inStart;
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layout(location = 2) in vec2 inEnd;
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layout(location = 3) in int inRepeating;
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layout(location = 4) in int inStopOffset;
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layout(location = 5) in int inStopCount;
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layout(location = 0) out vec2 outPos;
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layout(location = 1) out flat Rect outRect;
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layout(location = 2) out float outGradientPos;
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layout(location = 3) out flat int outRepeating;
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layout(location = 4) out flat int outStopOffset;
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layout(location = 5) out flat int outStopCount;
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float
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get_gradient_pos (vec2 pos)
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{
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pos = pos - inStart * push.scale;
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vec2 grad = (inEnd - inStart) * push.scale;
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return dot (pos, grad) / dot (grad, grad);
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}
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void main() {
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Rect r = rect_from_gsk (inRect);
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vec2 pos = set_position_from_rect (r);
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outPos = pos;
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outRect = r;
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outGradientPos = get_gradient_pos (pos);
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outRepeating = inRepeating;
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outStopOffset = inStopOffset;
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outStopCount = inStopCount;
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}
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