blob: 31d3ae24636325bbeb89a2e8d0649395ea026301 [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <impeller/texture.glsl>
uniform sampler2D texture_sampler;
uniform GradientInfo {
vec2 center;
float radius;
float tile_mode;
float texture_sampler_y_coord_scale;
float alpha;
vec2 half_texel;
} gradient_info;
in vec2 v_position;
out vec4 frag_color;
void main() {
float len = length(v_position - gradient_info.center);
float t = len / gradient_info.radius;
frag_color = IPSampleLinearWithTileMode(
texture_sampler,
vec2(t, 0.5),
gradient_info.texture_sampler_y_coord_scale,
gradient_info.half_texel,
gradient_info.tile_mode);
frag_color = vec4(frag_color.xyz * frag_color.a, frag_color.a) * gradient_info.alpha;
}