servo/resources/shaders/ps_image_clip.vs.glsl

38 lines
1.4 KiB
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) {
Primitive prim = load_primitive(gl_InstanceID);
Image image = fetch_image(prim.prim_index);
#ifdef WR_FEATURE_TRANSFORM
TransformVertexInfo vi = write_transform_vertex(prim.local_rect,
prim.local_clip_rect,
prim.layer,
prim.tile);
vLocalRect = vi.clipped_local_rect;
vLocalPos = vi.local_pos;
#else
VertexInfo vi = write_vertex(prim.local_rect,
prim.local_clip_rect,
prim.layer,
prim.tile);
vLocalRect = prim.local_rect;
vLocalPos = vi.local_clamped_pos;
#endif
ClipData clip = fetch_clip(prim.clip_index);
write_clip(clip);
// vUv will contain how many times this image has wrapped around the image size.
vec2 texture_size = vec2(textureSize(sColor0, 0));
vec2 st0 = image.st_rect.xy / texture_size;
vec2 st1 = image.st_rect.zw / texture_size;
vTextureSize = st1 - st0;
vTextureOffset = st0;
vTileSpacing = image.stretch_size_and_tile_spacing.zw;
vStretchSize = image.stretch_size_and_tile_spacing.xy;
}