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bacb3affb3
This adds a gsk prefix to the stuff in the preamble, as we want to avoid it conflicting with things in the main shader. Especially once we start allow some customization of shaders.
41 lines
1.3 KiB
GLSL
41 lines
1.3 KiB
GLSL
// VERTEX_SHADER:
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uniform vec4 u_color;
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uniform vec4 u_widths;
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uniform vec4[3] u_outline_rect;
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_OUT_ vec4 final_color;
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_OUT_ _GSK_ROUNDED_RECT_UNIFORM_ transformed_outside_outline;
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_OUT_ _GSK_ROUNDED_RECT_UNIFORM_ transformed_inside_outline;
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void main() {
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gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
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final_color = gsk_premultiply(u_color) * u_alpha;
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GskRoundedRect outside = gsk_create_rect(u_outline_rect);
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GskRoundedRect inside = gsk_rounded_rect_shrink (outside, u_widths);
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gsk_rounded_rect_transform(outside, u_modelview);
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gsk_rounded_rect_transform(inside, u_modelview);
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gsk_rounded_rect_encode(outside, transformed_outside_outline);
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gsk_rounded_rect_encode(inside, transformed_inside_outline);
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}
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// FRAGMENT_SHADER:
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uniform vec4[3] u_outline_rect;
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_IN_ vec4 final_color;
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_IN_ _GSK_ROUNDED_RECT_UNIFORM_ transformed_outside_outline;
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_IN_ _GSK_ROUNDED_RECT_UNIFORM_ transformed_inside_outline;
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void main() {
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vec2 frag = gsk_get_frag_coord();
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float alpha = clamp(gsk_rounded_rect_coverage(gsk_decode_rect(transformed_outside_outline), frag) -
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gsk_rounded_rect_coverage(gsk_decode_rect(transformed_inside_outline), frag),
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0.0, 1.0);
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gskSetOutputColor(final_color * alpha);
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}
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