30 lines
773 B
GLSL
30 lines
773 B
GLSL
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#version 450
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#include "common.frag.glsl"
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#include "clip.frag.glsl"
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#include "rect.frag.glsl"
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#define GSK_VULKAN_IMAGE_PREMULTIPLY (1 << 0)
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#
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layout(location = 0) in vec2 in_pos;
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layout(location = 1) in Rect in_rect;
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layout(location = 2) in vec2 in_tex_coord;
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layout(location = 3) flat in uint in_tex_id;
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layout(location = 4) in flat uint in_postprocess;
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layout(location = 0) out vec4 color;
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void main()
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{
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float alpha = rect_coverage (in_rect, in_pos);
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/* warning: This breaks with filters other than nearest,
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as linear filtering needs premultiplied alpha */
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vec4 pixel = texture (get_sampler (in_tex_id), in_tex_coord);
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if ((in_postprocess & GSK_VULKAN_IMAGE_PREMULTIPLY) != 0)
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pixel.rgb *= pixel.a;
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color = clip_scaled (in_pos, pixel * alpha);
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}
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