Aurimas Liutikas | 88c7ff1 | 2023-08-10 12:42:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.filterpacks.imageproc; |
| 18 | |
| 19 | import android.filterfw.core.FilterContext; |
| 20 | import android.filterfw.core.Program; |
| 21 | import android.filterfw.core.ShaderProgram; |
| 22 | |
| 23 | /** |
| 24 | * The filter linearly blends "left" and "right" frames. The blending weight is |
| 25 | * the multiplication of parameter "blend" and the alpha value in "right" frame. |
| 26 | * @hide |
| 27 | */ |
| 28 | public class BlendFilter extends ImageCombineFilter { |
| 29 | |
| 30 | private final String mBlendShader = |
| 31 | "precision mediump float;\n" + |
| 32 | "uniform sampler2D tex_sampler_0;\n" + |
| 33 | "uniform sampler2D tex_sampler_1;\n" + |
| 34 | "uniform float blend;\n" + |
| 35 | "varying vec2 v_texcoord;\n" + |
| 36 | "void main() {\n" + |
| 37 | " vec4 colorL = texture2D(tex_sampler_0, v_texcoord);\n" + |
| 38 | " vec4 colorR = texture2D(tex_sampler_1, v_texcoord);\n" + |
| 39 | " float weight = colorR.a * blend;\n" + |
| 40 | " gl_FragColor = mix(colorL, colorR, weight);\n" + |
| 41 | "}\n"; |
| 42 | |
| 43 | public BlendFilter(String name) { |
| 44 | super(name, new String[] { "left", "right" }, "blended", "blend"); |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | protected Program getNativeProgram(FilterContext context) { |
| 49 | throw new RuntimeException("TODO: Write native implementation for Blend!"); |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | protected Program getShaderProgram(FilterContext context) { |
| 54 | return new ShaderProgram(context, mBlendShader); |
| 55 | } |
| 56 | } |