119 lines
2.7 KiB
Plaintext
119 lines
2.7 KiB
Plaintext
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#if defined(GSK_GLES3)
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#extension GL_OES_EGL_image_external_essl3 : require
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#elif defined (GSK_GLES)
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#extension GL_OES_EGL_image_external : require
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#endif
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#ifndef GSK_LEGACY
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precision highp float;
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#endif
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#if defined(GSK_GLES) || defined(GSK_LEGACY)
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#define _OUT_ varying
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#define _IN_ varying
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#define _GSK_ROUNDED_RECT_UNIFORM_ vec4[3]
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#else
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#define _OUT_ out
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#define _IN_ in
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#define _GSK_ROUNDED_RECT_UNIFORM_ GskRoundedRect
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#endif
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struct GskRoundedRect
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{
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vec4 bounds; // Top left and bottom right
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// Look, arrays can't be in structs if you want to return the struct
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// from a function in gles or whatever. Just kill me.
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vec4 corner_points1; // xy = top left, zw = top right
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vec4 corner_points2; // xy = bottom right, zw = bottom left
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};
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void gsk_rounded_rect_normalize(inout GskRoundedRect r)
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{
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if (r.bounds.x > r.bounds.z)
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{
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float t = r.bounds.x;
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r.bounds.x = r.bounds.z;
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r.bounds.z = t;
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vec2 c = r.corner_points1.xy;
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r.corner_points1.xy = r.corner_points1.zw;
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r.corner_points1.zw = c;
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c = r.corner_points2.xy;
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r.corner_points2.xy = r.corner_points2.zw;
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r.corner_points2.zw = c;
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}
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if (r.bounds.y > r.bounds.w)
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{
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float t = r.bounds.y;
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r.bounds.y = r.bounds.w;
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r.bounds.w = t;
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vec2 c = r.corner_points1.xy;
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r.corner_points1.xy = r.corner_points2.xy;
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r.corner_points2.xy = c;
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c = r.corner_points1.zw;
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r.corner_points1.zw = r.corner_points2.zw;
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r.corner_points2.zw = c;
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}
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}
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void gsk_bounds_normalize (inout vec4 bounds)
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{
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if (bounds.x > bounds.z)
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{
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float t = bounds.x;
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bounds.x = bounds.z;
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bounds.z = t;
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}
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if (bounds.y > bounds.w)
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{
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float t = bounds.y;
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bounds.y = bounds.w;
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bounds.w = t;
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}
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}
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// Transform from a C GskRoundedRect to what we need.
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GskRoundedRect
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gsk_create_rect(vec4[3] data)
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{
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vec4 bounds = vec4(data[0].xy, data[0].xy + data[0].zw);
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vec4 corner_points1 = vec4(bounds.xy + data[1].xy,
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bounds.zy + vec2(data[1].zw * vec2(-1, 1)));
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vec4 corner_points2 = vec4(bounds.zw + (data[2].xy * vec2(-1, -1)),
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bounds.xw + vec2(data[2].zw * vec2(1, -1)));
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GskRoundedRect rect = GskRoundedRect(bounds, corner_points1, corner_points2);
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gsk_rounded_rect_normalize (rect);
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return rect;
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}
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vec4
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gsk_get_bounds(vec4[3] data)
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{
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vec4 bounds = vec4(data[0].xy, data[0].xy + data[0].zw);
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gsk_bounds_normalize (bounds);
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return bounds;
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}
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vec4 gsk_premultiply(vec4 c) {
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return vec4(c.rgb * c.a, c.a);
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}
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vec4 gsk_scaled_premultiply(vec4 c, float s) {
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// Fast version of gsk_premultiply(c) * s
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// 4 muls instead of 7
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float a = s * c.a;
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return vec4(c.rgb * a, a);
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}
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