RedEyeFilter.java revision 65953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9
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; 30import android.graphics.Bitmap; 31import android.graphics.Canvas; 32import android.graphics.Color; 33import android.graphics.Paint; 34import android.graphics.PointF; 35import android.util.Log; 36 37/** 38 * @hide 39 */ 40public class RedEyeFilter extends Filter { 41 42 private static final float RADIUS_RATIO = 0.06f; 43 private static final float MIN_RADIUS = 10.0f; 44 private static final float DEFAULT_RED_INTENSITY = 1.30f; 45 46 @GenerateFieldPort(name = "centers") 47 private float[] mCenters; 48 49 @GenerateFieldPort(name = "tile_size", hasDefault = true) 50 private int mTileSize = 640; 51 52 private Frame mRedEyeFrame; 53 private Bitmap mRedEyeBitmap; 54 55 private final Canvas mCanvas = new Canvas(); 56 private final Paint mPaint = new Paint(); 57 58 private float mRadius; 59 60 private int mWidth = 0; 61 private int mHeight = 0; 62 63 private Program mProgram; 64 private int mTarget = FrameFormat.TARGET_UNSPECIFIED; 65 66 private final String mRedEyeShader = 67 "precision mediump float;\n" + 68 "uniform sampler2D tex_sampler_0;\n" + 69 "uniform sampler2D tex_sampler_1;\n" + 70 "uniform float intensity;\n" + 71 "varying vec2 v_texcoord;\n" + 72 "void main() {\n" + 73 " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + 74 " vec4 mask = texture2D(tex_sampler_1, v_texcoord);\n" + 75 " gl_FragColor = vec4(mask.a, mask.a, mask.a, 1.0) * intensity + color * (1.0 - intensity);\n" + 76 " if (mask.a > 0.0) {\n" + 77 " gl_FragColor.r = 0.0;\n" + 78 " float green_blue = color.g + color.b;\n" + 79 " float red_intensity = color.r / green_blue;\n" + 80 " if (red_intensity > intensity) {\n" + 81 " color.r = 0.5 * green_blue;\n" + 82 " }\n" + 83 " }\n" + 84 " gl_FragColor = color;\n" + 85 "}\n"; 86 87 public RedEyeFilter(String name) { 88 super(name); 89 } 90 91 @Override 92 public void setupPorts() { 93 addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 94 addOutputBasedOnInput("image", "image"); 95 } 96 97 @Override 98 public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 99 return inputFormat; 100 } 101 102 public void initProgram(FilterContext context, int target) { 103 switch (target) { 104 case FrameFormat.TARGET_GPU: 105 ShaderProgram shaderProgram = new ShaderProgram(context, mRedEyeShader); 106 shaderProgram.setMaximumTileSize(mTileSize); 107 mProgram = shaderProgram; 108 break; 109 110 default: 111 throw new RuntimeException("Filter RedEye does not support frames of " + 112 "target " + target + "!"); 113 } 114 mTarget = target; 115 } 116 117 @Override 118 public void tearDown(FilterContext context) { 119 if (mRedEyeBitmap != null) { 120 mRedEyeBitmap.recycle(); 121 mRedEyeBitmap = null; 122 } 123 } 124 125 @Override 126 public void process(FilterContext context) { 127 // Get input frame 128 Frame input = pullInput("image"); 129 FrameFormat inputFormat = input.getFormat(); 130 131 // Create output frame 132 Frame output = context.getFrameManager().newFrame(inputFormat); 133 134 // Create program if not created already 135 if (mProgram == null || inputFormat.getTarget() != mTarget) { 136 initProgram(context, inputFormat.getTarget()); 137 } 138 139 // Check if the frame size has changed 140 if (inputFormat.getWidth() != mWidth || inputFormat.getHeight() != mHeight) { 141 mWidth = inputFormat.getWidth(); 142 mHeight = inputFormat.getHeight(); 143 144 createRedEyeBitmap(); 145 } 146 147 createRedEyeFrame(context); 148 149 // Process 150 Frame[] inputs = {input, mRedEyeFrame}; 151 mProgram.process(inputs, output); 152 153 // Push output 154 pushOutput("image", output); 155 156 // Release pushed frame 157 output.release(); 158 159 // Release unused frame 160 mRedEyeFrame.release(); 161 mRedEyeFrame = null; 162 } 163 164 @Override 165 public void fieldPortValueUpdated(String name, FilterContext context) { 166 if (mProgram != null) { 167 updateProgramParams(); 168 } 169 } 170 171 private void createRedEyeBitmap() { 172 if (mRedEyeBitmap != null) { 173 mRedEyeBitmap.recycle(); 174 } 175 176 int bitmapWidth = mWidth / 2; 177 int bitmapHeight = mHeight / 2; 178 179 mRedEyeBitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888); 180 mCanvas.setBitmap(mRedEyeBitmap); 181 mPaint.setColor(Color.WHITE); 182 mRadius = Math.max(MIN_RADIUS, RADIUS_RATIO * Math.min(bitmapWidth, bitmapHeight)); 183 184 updateProgramParams(); 185 } 186 187 private void createRedEyeFrame(FilterContext context) { 188 FrameFormat format = ImageFormat.create(mRedEyeBitmap.getWidth() , 189 mRedEyeBitmap.getHeight(), 190 ImageFormat.COLORSPACE_RGBA, 191 FrameFormat.TARGET_GPU); 192 mRedEyeFrame = context.getFrameManager().newFrame(format); 193 mRedEyeFrame.setBitmap(mRedEyeBitmap); 194 } 195 196 private void updateProgramParams() { 197 mProgram.setHostValue("intensity", DEFAULT_RED_INTENSITY); 198 199 if ( mCenters.length % 2 == 1) { 200 throw new RuntimeException("The size of center array must be even."); 201 } 202 203 if (mRedEyeBitmap != null) { 204 for (int i = 0; i < mCenters.length; i += 2) { 205 mCanvas.drawCircle(mCenters[i] * mRedEyeBitmap.getWidth(), 206 mCenters[i + 1] * mRedEyeBitmap.getHeight(), 207 mRadius, mPaint); 208 } 209 } 210 } 211} 212