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 17package android.filterpacks.imageproc; 18 19import android.filterfw.core.Filter; 20import android.filterfw.core.FilterContext; 21import android.filterfw.core.Frame; 22import android.filterfw.core.FrameFormat; 23import android.filterfw.core.GenerateFieldPort; 24import android.filterfw.core.KeyValueMap; 25import android.filterfw.core.NativeProgram; 26import android.filterfw.core.NativeFrame; 27import android.filterfw.core.Program; 28import android.filterfw.core.ShaderProgram; 29import android.filterfw.format.ImageFormat; 30 31public class SepiaFilter extends Filter { 32 33 @GenerateFieldPort(name = "tile_size", hasDefault = true) 34 private int mTileSize = 640; 35 36 private Program mProgram; 37 private int mTarget = FrameFormat.TARGET_UNSPECIFIED; 38 39 private final String mSepiaShader = 40 "precision mediump float;\n" + 41 "uniform sampler2D tex_sampler_0;\n" + 42 "uniform mat3 matrix;\n" + 43 "varying vec2 v_texcoord;\n" + 44 "void main() {\n" + 45 " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + 46 " vec3 new_color = min(matrix * color.rgb, 1.0);\n" + 47 " gl_FragColor = vec4(new_color.rgb, color.a);\n" + 48 "}\n"; 49 50 public SepiaFilter(String name) { 51 super(name); 52 } 53 54 @Override 55 public void setupPorts() { 56 addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 57 addOutputBasedOnInput("image", "image"); 58 } 59 60 @Override 61 public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 62 return inputFormat; 63 } 64 65 public void initProgram(FilterContext context, int target) { 66 switch (target) { 67 case FrameFormat.TARGET_GPU: 68 ShaderProgram shaderProgram = new ShaderProgram(context, mSepiaShader); 69 shaderProgram.setMaximumTileSize(mTileSize); 70 mProgram = shaderProgram; 71 break; 72 73 default: 74 throw new RuntimeException("Filter Sharpen does not support frames of " + 75 "target " + target + "!"); 76 } 77 mTarget = target; 78 } 79 80 @Override 81 public void process(FilterContext context) { 82 // Get input frame 83 Frame input = pullInput("image"); 84 FrameFormat inputFormat = input.getFormat(); 85 86 // Create output frame 87 Frame output = context.getFrameManager().newFrame(inputFormat); 88 89 // Create program if not created already 90 if (mProgram == null || inputFormat.getTarget() != mTarget) { 91 initProgram(context, inputFormat.getTarget()); 92 initParameters(); 93 } 94 95 // Process 96 mProgram.process(input, output); 97 98 // Push output 99 pushOutput("image", output); 100 101 // Release pushed frame 102 output.release(); 103 } 104 105 private void initParameters() { 106 float weights[] = { 805.0f / 2048.0f, 715.0f / 2048.0f, 557.0f / 2048.0f, 107 1575.0f / 2048.0f, 1405.0f / 2048.0f, 1097.0f / 2048.0f, 108 387.0f / 2048.0f, 344.0f / 2048.0f, 268.0f / 2048.0f }; 109 mProgram.setHostValue("matrix", weights); 110 } 111} 112