mirror of
https://github.com/servo/servo.git
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114 lines
3.8 KiB
GLSL
114 lines
3.8 KiB
GLSL
#line 1
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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struct Border {
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PrimitiveInfo info;
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vec4 verticalColor;
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vec4 horizontalColor;
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vec4 radii;
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uvec4 border_style_trbl;
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};
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layout(std140) uniform Items {
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Border borders[WR_MAX_PRIM_ITEMS];
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};
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uint get_border_style(Border a_border, uint a_edge) {
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switch (a_edge) {
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case PST_TOP:
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case PST_TOP_LEFT:
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return a_border.border_style_trbl.x;
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case PST_BOTTOM_LEFT:
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case PST_LEFT:
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return a_border.border_style_trbl.z;
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case PST_BOTTOM_RIGHT:
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case PST_BOTTOM:
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return a_border.border_style_trbl.w;
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case PST_TOP_RIGHT:
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case PST_RIGHT:
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return a_border.border_style_trbl.y;
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}
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}
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void main(void) {
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Border border = borders[gl_InstanceID];
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VertexInfo vi = write_vertex(border.info);
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// Just our boring radius position.
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vRadii = border.radii;
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float x0, y0, x1, y1;
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vBorderPart = border.info.layer_tile_part.z;
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switch (vBorderPart) {
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// These are the layer tile part PrimitivePart as uploaded by the tiling.rs
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case PST_TOP_LEFT:
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x0 = border.info.local_rect.x;
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y0 = border.info.local_rect.y;
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// These are width / heights
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x1 = border.info.local_rect.x + border.info.local_rect.z;
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y1 = border.info.local_rect.y + border.info.local_rect.w;
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// The radius here is the border-radius. This is 0, so vRefPoint will
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// just be the top left (x,y) corner.
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vRefPoint = vec2(x0, y0) + vRadii.xy;
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break;
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case PST_TOP_RIGHT:
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x0 = border.info.local_rect.x + border.info.local_rect.z;
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y0 = border.info.local_rect.y;
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x1 = border.info.local_rect.x;
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y1 = border.info.local_rect.y + border.info.local_rect.w;
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vRefPoint = vec2(x0, y0) + vec2(-vRadii.x, vRadii.y);
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break;
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case PST_BOTTOM_LEFT:
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x0 = border.info.local_rect.x;
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y0 = border.info.local_rect.y + border.info.local_rect.w;
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x1 = border.info.local_rect.x + border.info.local_rect.z;
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y1 = border.info.local_rect.y;
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vRefPoint = vec2(x0, y0) + vec2(vRadii.x, -vRadii.y);
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break;
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case PST_BOTTOM_RIGHT:
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x0 = border.info.local_rect.x;
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y0 = border.info.local_rect.y;
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x1 = border.info.local_rect.x + border.info.local_rect.z;
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y1 = border.info.local_rect.y + border.info.local_rect.w;
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vRefPoint = vec2(x1, y1) + vec2(-vRadii.x, -vRadii.y);
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break;
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case PST_TOP:
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case PST_LEFT:
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case PST_BOTTOM:
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case PST_RIGHT:
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vRefPoint = border.info.local_rect.xy;
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x0 = border.info.local_rect.x;
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y0 = border.info.local_rect.y;
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x1 = border.info.local_rect.x + border.info.local_rect.z;
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y1 = border.info.local_rect.y + border.info.local_rect.w;
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break;
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}
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vBorderStyle = get_border_style(border, vBorderPart);
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// y1 - y0 is the height of the corner / line
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// x1 - x0 is the width of the corner / line.
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float width = x1 - x0;
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float height = y1 - y0;
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// This is just a weighting of the pixel colors it seems?
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vF = (vi.local_clamped_pos.x - x0) * height - (vi.local_clamped_pos.y - y0) * width;
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// This is what was currently sent.
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vVerticalColor = border.verticalColor;
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vHorizontalColor = border.horizontalColor;
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// Local space
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vLocalPos = vi.local_clamped_pos.xy;
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// Local space
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vLocalBorders = border.info.local_rect;
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// These are in device space
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vDevicePos = vi.global_clamped_pos;
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// These are in device space
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vBorders = border.info.local_rect * uDevicePixelRatio;
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}
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