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-rw-r--r--shaders/rect.frag33
1 files changed, 0 insertions, 33 deletions
diff --git a/shaders/rect.frag b/shaders/rect.frag
deleted file mode 100644
index ecec50d..0000000
--- a/shaders/rect.frag
+++ /dev/null
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-/* The fragment shader uses the UV coordinates to calculate whether it is in
- the T, R, B, or L border. These are then mixed with the border color, and
- their inverse is mixed with the fill color, to calculate the fragment color.
- For example, if we are in the top border, then T=1, so the border mix factor
- TRBL=1, and the fill mix factor (1-TRBL) is 0.
-
- The use of pixel units here is handy because the border width can be
- specified precisely in pixels to draw sharp lines. The border width is just
- hardcoded, but could be made a uniform or vertex attribute easily enough. */
-
-INTER(location = 0) noperspective in vec2 f_uv;
-INTER(location = 1) noperspective in vec2 f_size;
-INTER(location = 2) noperspective in vec4 f_fillColor;
-
-layout(location = 0) out vec4 FragColor;
-
-void
-main()
-{
- const float borderWidth = 2.0;
-
- vec4 borderColor = f_fillColor + vec4(0.0, 0.4, 0.4, 0.0);
- float t = step(borderWidth, f_uv[1]);
- float r = step(borderWidth, f_size.x - f_uv[0]);
- float b = step(borderWidth, f_size.y - f_uv[1]);
- float l = step(borderWidth, f_uv[0]);
- float fillMix = t * r * b * l;
- float borderMix = 1.0 - fillMix;
- vec4 fill = fillMix * f_fillColor;
- vec4 border = borderMix * borderColor;
-
- FragColor = fill + border;
-}