forked from AuroraMiddleware/gtk
103 lines
2.5 KiB
GLSL
103 lines
2.5 KiB
GLSL
uniform sampler2D u_source;
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uniform mat4 u_projection;
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uniform mat4 u_modelview;
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uniform float u_alpha;// = 1.0;
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uniform vec4 u_viewport;
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uniform vec4[3] u_clip_rect;
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#if GSK_GLES
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#elif GSK_LEGACY
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_OUT_ vec4 outputColor;
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#else
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_OUT_ vec4 outputColor;
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#endif
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_IN_ vec2 vUv;
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RoundedRect decode_rect(_ROUNDED_RECT_UNIFORM_ r)
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{
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#if defined(GSK_GLES) || defined(GSK_LEGACY)
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return RoundedRect(r[0], r[1], r[2]);
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#else
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return r;
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#endif
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}
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float
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ellipsis_dist (vec2 p, vec2 radius)
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{
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if (radius == vec2(0, 0))
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return 0.0;
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vec2 p0 = p / radius;
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vec2 p1 = 2.0 * p0 / radius;
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return (dot(p0, p0) - 1.0) / length (p1);
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}
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float
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ellipsis_coverage (vec2 point, vec2 center, vec2 radius)
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{
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float d = ellipsis_dist (point - center, radius);
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return clamp (0.5 - d, 0.0, 1.0);
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}
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float
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rounded_rect_coverage (RoundedRect r, vec2 p)
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{
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if (p.x < r.bounds.x || p.y < r.bounds.y ||
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p.x >= r.bounds.z || p.y >= r.bounds.w)
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return 0.0;
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vec2 rad_tl = r.corner_points1.xy - r.bounds.xy;
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vec2 rad_tr = r.corner_points1.zw - r.bounds.zy;
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vec2 rad_br = r.corner_points2.xy - r.bounds.zw;
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vec2 rad_bl = r.corner_points2.zw - r.bounds.xw;
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vec2 ref_tl = r.corner_points1.xy;
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vec2 ref_tr = r.corner_points1.zw;
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vec2 ref_br = r.corner_points2.xy;
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vec2 ref_bl = r.corner_points2.zw;
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float d_tl = ellipsis_coverage(p, ref_tl, rad_tl);
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float d_tr = ellipsis_coverage(p, ref_tr, rad_tr);
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float d_br = ellipsis_coverage(p, ref_br, rad_br);
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float d_bl = ellipsis_coverage(p, ref_bl, rad_bl);
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vec4 corner_coverages = 1.0 - vec4(d_tl, d_tr, d_br, d_bl);
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bvec4 is_out = bvec4(p.x < ref_tl.x && p.y < ref_tl.y,
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p.x > ref_tr.x && p.y < ref_tr.y,
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p.x > ref_br.x && p.y > ref_br.y,
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p.x < ref_bl.x && p.y > ref_bl.y);
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return 1.0 - dot(vec4(is_out), corner_coverages);
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}
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vec4 Texture(sampler2D sampler, vec2 texCoords) {
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#if defined(GSK_GLES) || defined(GSK_LEGACY)
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return texture2D(sampler, texCoords);
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#else
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return texture(sampler, texCoords);
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#endif
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}
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void setOutputColor(vec4 color) {
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vec4 f = gl_FragCoord;
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f.x += u_viewport.x;
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f.y = (u_viewport.y + u_viewport.w) - f.y;
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// We do *NOT* transform the clip rect here since we already
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// need to do that on the CPU.
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#if defined(GSK_GLES) || defined(GSK_LEGACY)
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gl_FragColor = color * rounded_rect_coverage(create_rect(u_clip_rect), f.xy);
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#else
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outputColor = color * rounded_rect_coverage(create_rect(u_clip_rect), f.xy);
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#endif
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/*outputColor = color;*/
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}
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