forked from AuroraMiddleware/gtk
6bec7aae89
Instead of having 3 different shaders for the different clipping versions, just have one shader and use a preprocessor define to use different clip functions. That preprocessor define is set in the Makefile. Also use foo.frag and foo.vert as the file extensions instead of using foo.frag.glsl and foo.vert.glsl, as that's what glslc suggests as extension.
77 lines
2.3 KiB
GLSL
77 lines
2.3 KiB
GLSL
#version 420 core
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#include "clip.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 inStopCount;
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layout(location = 5) in vec4 inOffsets0;
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layout(location = 6) in vec4 inOffsets1;
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layout(location = 7) in vec4 inColors0;
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layout(location = 8) in vec4 inColors1;
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layout(location = 9) in vec4 inColors2;
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layout(location = 10) in vec4 inColors3;
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layout(location = 11) in vec4 inColors4;
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layout(location = 12) in vec4 inColors5;
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layout(location = 13) in vec4 inColors6;
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layout(location = 14) in vec4 inColors7;
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layout(location = 0) out vec2 outPos;
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layout(location = 1) out float outGradientPos;
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layout(location = 2) out flat int outRepeating;
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layout(location = 3) out flat int outStopCount;
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layout(location = 4) out flat ColorStop outStops[8];
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out gl_PerVertex {
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vec4 gl_Position;
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};
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vec2 offsets[6] = { vec2(0.0, 0.0),
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vec2(1.0, 0.0),
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vec2(0.0, 1.0),
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vec2(0.0, 1.0),
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vec2(1.0, 0.0),
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vec2(1.0, 1.0) };
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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;
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vec2 grad = inEnd - inStart;
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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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vec4 rect = clip (inRect);
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vec2 pos = rect.xy + rect.zw * offsets[gl_VertexIndex];
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gl_Position = push.mvp * vec4 (pos, 0.0, 1.0);
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outPos = pos;
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outGradientPos = get_gradient_pos (pos);
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outRepeating = inRepeating;
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outStopCount = inStopCount;
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outStops[0].offset = inOffsets0[0];
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outStops[0].color = inColors0 * vec4(inColors0.aaa, 1.0);
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outStops[1].offset = inOffsets0[1];
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outStops[1].color = inColors1 * vec4(inColors1.aaa, 1.0);
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outStops[2].offset = inOffsets0[2];
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outStops[2].color = inColors2 * vec4(inColors2.aaa, 1.0);
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outStops[3].offset = inOffsets0[3];
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outStops[3].color = inColors3 * vec4(inColors3.aaa, 1.0);
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outStops[4].offset = inOffsets1[0];
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outStops[4].color = inColors4 * vec4(inColors4.aaa, 1.0);
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outStops[5].offset = inOffsets1[1];
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outStops[5].color = inColors5 * vec4(inColors5.aaa, 1.0);
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outStops[6].offset = inOffsets1[2];
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outStops[6].color = inColors6 * vec4(inColors6.aaa, 1.0);
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outStops[7].offset = inOffsets1[3];
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outStops[7].color = inColors7 * vec4(inColors7.aaa, 1.0);
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}
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