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/* 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/. */
#include gradient
// Size of the gradient pattern's rectangle, used to compute horizontal and vertical
// repetitions. Not to be confused with another kind of repetition of the pattern
// which happens along the gradient stops.
flat varying vec2 v_repeated_size;
varying vec2 v_pos;
#ifdef WR_FEATURE_ALPHA_PASS
flat varying vec2 v_tile_repeat;
#endif
#ifdef WR_VERTEX_SHADER
void write_gradient_vertex(
VertexInfo vi,
RectWithEndpoint local_rect,
RectWithEndpoint segment_rect,
ivec4 prim_user_data,
int brush_flags,
vec4 texel_rect,
int extend_mode,
vec2 stretch_size
) {
if ((brush_flags & BRUSH_FLAG_SEGMENT_RELATIVE) != 0) {
v_pos = (vi.local_pos - segment_rect.p0) / rect_size(segment_rect);
v_pos = v_pos * (texel_rect.zw - texel_rect.xy) + texel_rect.xy;
v_pos = v_pos * rect_size(local_rect);
} else {
v_pos = vi.local_pos - local_rect.p0;
}
vec2 tile_repeat = rect_size(local_rect) / stretch_size;
v_repeated_size = stretch_size;
// Normalize UV to 0..1 scale.
v_pos /= v_repeated_size;
v_gradient_address.x = prim_user_data.x;
// Whether to repeat the gradient along the line instead of clamping.
v_gradient_repeat.x = float(extend_mode == EXTEND_MODE_REPEAT);
#ifdef WR_FEATURE_ALPHA_PASS
v_tile_repeat = tile_repeat;
#endif
}
#endif //WR_VERTEX_SHADER
#ifdef WR_FRAGMENT_SHADER
vec2 compute_repeated_pos() {
#if defined(WR_FEATURE_ALPHA_PASS) && !defined(SWGL_ANTIALIAS)
// Handle top and left inflated edges (see brush_image).
vec2 local_pos = max(v_pos, vec2(0.0));
// Apply potential horizontal and vertical repetitions.
vec2 pos = fract(local_pos);
// Handle bottom and right inflated edges (see brush_image).
if (local_pos.x >= v_tile_repeat.x) {
pos.x = 1.0;
}
if (local_pos.y >= v_tile_repeat.y) {
pos.y = 1.0;
}
return pos;
#else
// Apply potential horizontal and vertical repetitions.
return fract(v_pos);
#endif
}
#endif //WR_FRAGMENT_SHADER
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