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 " if (mask.a > 0.0) {\n" + 76 " float green_blue = color.g + color.b;\n" + 77 " float red_intensity = color.r / green_blue;\n" + 78 " if (red_intensity > intensity) {\n" + 79 " color.r = 0.5 * green_blue;\n" + 80 " }\n" + 81 " }\n" + 82 " gl_FragColor = color;\n" + 83 "}\n"; 84 85 public RedEyeFilter(String name) { 86 super(name); 87 } 88 89 @Override 90 public void setupPorts() { 91 addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 92 addOutputBasedOnInput("image", "image"); 93 } 94 95 @Override 96 public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 97 return inputFormat; 98 } 99 100 public void initProgram(FilterContext context, int target) { 101 switch (target) { 102 case FrameFormat.TARGET_GPU: 103 ShaderProgram shaderProgram = new ShaderProgram(context, mRedEyeShader); 104 shaderProgram.setMaximumTileSize(mTileSize); 105 mProgram = shaderProgram; 106 mProgram.setHostValue("intensity", DEFAULT_RED_INTENSITY); 107 break; 108 default: 109 throw new RuntimeException("Filter RedEye does not support frames of " + 110 "target " + target + "!"); 111 } 112 mTarget = target; 113 } 114 115 @Override 116 public void process(FilterContext context) { 117 // Get input frame 118 Frame input = pullInput("image"); 119 FrameFormat inputFormat = input.getFormat(); 120 121 // Create output frame 122 Frame output = context.getFrameManager().newFrame(inputFormat); 123 124 // Create program if not created already 125 if (mProgram == null || inputFormat.getTarget() != mTarget) { 126 initProgram(context, inputFormat.getTarget()); 127 } 128 129 // Check if the frame size has changed 130 if (inputFormat.getWidth() != mWidth || inputFormat.getHeight() != mHeight) { 131 mWidth = inputFormat.getWidth(); 132 mHeight = inputFormat.getHeight(); 133 } 134 createRedEyeFrame(context); 135 136 // Process 137 Frame[] inputs = {input, mRedEyeFrame}; 138 mProgram.process(inputs, output); 139 140 // Push output 141 pushOutput("image", output); 142 143 // Release pushed frame 144 output.release(); 145 146 // Release unused frame 147 mRedEyeFrame.release(); 148 mRedEyeFrame = null; 149 } 150 151 @Override 152 public void fieldPortValueUpdated(String name, FilterContext context) { 153 if (mProgram != null) { 154 updateProgramParams(); 155 } 156 } 157 158 private void createRedEyeFrame(FilterContext context) { 159 int bitmapWidth = mWidth / 2; 160 int bitmapHeight = mHeight / 2; 161 162 Bitmap redEyeBitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888); 163 mCanvas.setBitmap(redEyeBitmap); 164 mPaint.setColor(Color.WHITE); 165 mRadius = Math.max(MIN_RADIUS, RADIUS_RATIO * Math.min(bitmapWidth, bitmapHeight)); 166 167 for (int i = 0; i < mCenters.length; i += 2) { 168 mCanvas.drawCircle(mCenters[i] * bitmapWidth, mCenters[i + 1] * bitmapHeight, 169 mRadius, mPaint); 170 } 171 172 FrameFormat format = ImageFormat.create(bitmapWidth, bitmapHeight, 173 ImageFormat.COLORSPACE_RGBA, 174 FrameFormat.TARGET_GPU); 175 mRedEyeFrame = context.getFrameManager().newFrame(format); 176 mRedEyeFrame.setBitmap(redEyeBitmap); 177 redEyeBitmap.recycle(); 178 } 179 180 private void updateProgramParams() { 181 if ( mCenters.length % 2 == 1) { 182 throw new RuntimeException("The size of center array must be even."); 183 } 184 } 185} 186