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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 shared
varying float vPos;
flat varying vec4 vStops;
flat varying vec4 vColor0;
flat varying vec4 vColor1;
flat varying vec4 vColor2;
flat varying vec4 vColor3;
#ifdef WR_VERTEX_SHADER
PER_INSTANCE in vec4 aTaskRect;
PER_INSTANCE in float aAxisSelect;
PER_INSTANCE in vec4 aStops;
PER_INSTANCE in vec4 aColor0;
PER_INSTANCE in vec4 aColor1;
PER_INSTANCE in vec4 aColor2;
PER_INSTANCE in vec4 aColor3;
PER_INSTANCE in vec2 aStartStop;
void main(void) {
vPos = mix(aStartStop.x, aStartStop.y, mix(aPosition.x, aPosition.y, aAxisSelect));
vStops = aStops;
vColor0 = aColor0;
vColor1 = aColor1;
vColor2 = aColor2;
vColor3 = aColor3;
gl_Position = uTransform * vec4(aTaskRect.xy + aTaskRect.zw * aPosition.xy, 0.0, 1.0);
}
#endif
#ifdef WR_FRAGMENT_SHADER
float linear_step(float edge0, float edge1, float x) {
if (edge0 >= edge1) {
return 0.0;
}
return clamp((x - edge0) / (edge1 - edge0), 0.0, 1.0);
}
void main(void) {
vec4 color = vColor0;
color = mix(color, vColor1, linear_step(vStops.x, vStops.y, vPos));
color = mix(color, vColor2, linear_step(vStops.y, vStops.z, vPos));
color = mix(color, vColor3, linear_step(vStops.z, vStops.w, vPos));
oFragColor = color;
}
#endif
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