servo/resources/shaders/ps_image_clip.fs.glsl
2016-09-15 09:07:27 +10:00

27 lines
919 B
GLSL

#line 1
/* 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/. */
void main(void) {
#ifdef WR_FEATURE_TRANSFORM
float alpha = 1;
vec2 local_pos = init_transform_fs(vLocalPos, vLocalRect, alpha);
// We clamp the texture coordinate calculation here to the local rectangle boundaries,
// which makes the edge of the texture stretch instead of repeat.
vec2 uv = clamp(local_pos.xy, vLocalRect.xy, vLocalRect.xy + vLocalRect.zw);
uv = (uv - vLocalRect.xy) / vStretchSize;
#else
float alpha = 1;
vec2 local_pos = vLocalPos;
vec2 uv = vUv;
#endif
vec2 st = vTextureOffset + vTextureSize * fract(uv);
alpha = min(alpha, do_clip(local_pos, vClipRect, vClipRadius));
oFragColor = texture(sDiffuse, st) * vec4(1, 1, 1, alpha);
}