65 lines
1.6 KiB
GLSL
65 lines
1.6 KiB
GLSL
/*
|
|
* Copyright (c) 2012 Adobe Systems Incorporated. All rights reserved.
|
|
* Copyright (c) 2012 Branislav Ulicny
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
precision mediump float;
|
|
|
|
// Uniform values from CSS
|
|
|
|
uniform float amount;
|
|
uniform float tileOutline;
|
|
|
|
// Built-in uniforms
|
|
|
|
uniform vec2 u_meshSize;
|
|
uniform vec2 u_textureSize;
|
|
|
|
// Varyings passed in from vertex shader
|
|
|
|
varying float v_depth;
|
|
varying vec2 v_uv;
|
|
|
|
// Main
|
|
|
|
void main()
|
|
{
|
|
// FIXME: Must swap x and y as a workaround for:
|
|
// https://bugs.webkit.org/show_bug.cgi?id=96285
|
|
vec2 u_meshSize = u_meshSize.yx;
|
|
|
|
vec4 c = vec4(1.0);
|
|
|
|
// Fade out.
|
|
c.a = 1.0 - v_depth;
|
|
|
|
// Show grid outline.
|
|
if (tileOutline >= 0.5) {
|
|
float cell_width = u_textureSize.x / u_meshSize.y;
|
|
float cell_height = u_textureSize.y / u_meshSize.x;
|
|
float dd = 1.0;
|
|
|
|
if (mod(v_uv.x * u_textureSize.x + dd, cell_width) < 2.0
|
|
|| mod(v_uv.y * u_textureSize.y + dd, cell_height) < 2.0) {
|
|
if (amount > 0.0)
|
|
c.rgb = vec3(1.0 - sqrt(amount));
|
|
}
|
|
}
|
|
css_ColorMatrix = mat4(c.r, 0.0, 0.0, 0.0,
|
|
0.0, c.g, 0.0, 0.0,
|
|
0.0, 0.0, c.b, 0.0,
|
|
0.0, 0.0, 0.0, c.a);
|
|
}
|