mirror of
https://github.com/servo/servo.git
synced 2025-06-06 16:45:39 +00:00
c0531c312f
WebRender is an experimental GPU accelerated rendering backend for Servo. The WebRender backend can be specified by running Servo with the -w option (otherwise the default rendering backend will be used). WebRender has many bugs, and missing features - but it is usable to browse most websites - please report any WebRender specific rendering bugs you encounter!
38 lines
1.2 KiB
GLSL
38 lines
1.2 KiB
GLSL
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
// GLSL point in rect test.
|
|
// See: https://stackoverflow.com/questions/12751080/glsl-point-inside-box-test
|
|
bool PointInRect(vec2 p, vec2 p0, vec2 p1)
|
|
{
|
|
vec2 s = step(p0, p) - step(p1, p);
|
|
return s.x * s.y != 0.0;
|
|
}
|
|
|
|
void main(void)
|
|
{
|
|
// Clip out.
|
|
if (PointInRect(vPosition, vClipOutRect.xy, vClipOutRect.zw)) {
|
|
discard;
|
|
}
|
|
|
|
// Clip in.
|
|
if (!PointInRect(vPosition, vClipInRect.xy, vClipInRect.zw)) {
|
|
discard;
|
|
}
|
|
|
|
// Apply image tiling parameters (offset and scale) to color UVs.
|
|
vec2 colorTexCoord = vTileParams.xy + fract(vColorTexCoord.xy) * vTileParams.zw;
|
|
vec2 maskTexCoord = vMaskTexCoord.xy;
|
|
|
|
// Fetch the diffuse and mask texels.
|
|
vec4 diffuse = Texture(sDiffuse, colorTexCoord);
|
|
vec4 mask = Texture(sMask, maskTexCoord);
|
|
|
|
// Extract alpha from the mask (component depends on platform)
|
|
float alpha = GetAlphaFromMask(mask);
|
|
|
|
// Write the final fragment color.
|
|
SetFragColor(diffuse * vec4(vColor.rgb, vColor.a * alpha));
|
|
}
|