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.Filter; 20 import android.filterfw.core.FilterContext; 21 import android.filterfw.core.Frame; 22 import android.filterfw.core.FrameFormat; 23 import android.filterfw.core.GenerateFieldPort; 24 import android.filterfw.core.Program; 25 import android.filterfw.core.ShaderProgram; 26 import android.filterfw.format.ImageFormat; 27 28 public class PosterizeFilter extends Filter { 29 30 @GenerateFieldPort(name = "tile_size", hasDefault = true) 31 private int mTileSize = 640; 32 33 private Program mProgram; 34 private int mTarget = FrameFormat.TARGET_UNSPECIFIED; 35 36 private final String mPosterizeShader = 37 "precision mediump float;\n" + 38 "uniform sampler2D tex_sampler_0;\n" + 39 "varying vec2 v_texcoord;\n" + 40 "void main() {\n" + 41 " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + 42 " vec3 pcolor;\n" + 43 " pcolor.r = (color.r >= 0.5) ? 0.75 : 0.25;\n" + 44 " pcolor.g = (color.g >= 0.5) ? 0.75 : 0.25;\n" + 45 " pcolor.b = (color.b >= 0.5) ? 0.75 : 0.25;\n" + 46 " gl_FragColor = vec4(pcolor, color.a);\n" + 47 "}\n"; 48 49 public PosterizeFilter(String name) { 50 super(name); 51 } 52 53 @Override 54 public void setupPorts() { 55 addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 56 addOutputBasedOnInput("image", "image"); 57 } 58 59 @Override 60 public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 61 return inputFormat; 62 } 63 64 public void initProgram(FilterContext context, int target) { 65 switch (target) { 66 case FrameFormat.TARGET_GPU: 67 ShaderProgram shaderProgram = new ShaderProgram(context, mPosterizeShader); 68 shaderProgram.setMaximumTileSize(mTileSize); 69 mProgram = shaderProgram; 70 break; 71 72 default: 73 throw new RuntimeException("Filter Sharpen does not support frames of " + 74 "target " + target + "!"); 75 } 76 mTarget = target; 77 } 78 79 @Override 80 public void process(FilterContext context) { 81 // Get input frame 82 Frame input = pullInput("image"); 83 FrameFormat inputFormat = input.getFormat(); 84 85 // Create output frame 86 Frame output = context.getFrameManager().newFrame(inputFormat); 87 88 // Create program if not created already 89 if (mProgram == null || inputFormat.getTarget() != mTarget) { 90 initProgram(context, inputFormat.getTarget()); 91 } 92 93 // Process 94 mProgram.process(input, output); 95 96 // Push output 97 pushOutput("image", output); 98 99 // Release pushed frame 100 output.release(); 101 } 102 103 } 104
