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 18package android.filterpacks.imageproc; 19 20import android.filterfw.core.Filter; 21import android.filterfw.core.FilterContext; 22import android.filterfw.core.Frame; 23import android.filterfw.core.FrameFormat; 24import android.filterfw.core.GenerateFieldPort; 25import android.filterfw.core.GLFrame; 26import android.filterfw.core.MutableFrameFormat; 27import android.filterfw.core.Program; 28import android.filterfw.core.ShaderProgram; 29import android.filterfw.format.ImageFormat; 30 31import android.opengl.GLES20; 32 33/** 34 * @hide 35 */ 36public class ResizeFilter extends Filter { 37 38 @GenerateFieldPort(name = "owidth") 39 private int mOWidth; 40 @GenerateFieldPort(name = "oheight") 41 private int mOHeight; 42 @GenerateFieldPort(name = "keepAspectRatio", hasDefault = true) 43 private boolean mKeepAspectRatio = false; 44 @GenerateFieldPort(name = "generateMipMap", hasDefault = true) 45 private boolean mGenerateMipMap = false; 46 47 private Program mProgram; 48 private FrameFormat mLastFormat = null; 49 50 private MutableFrameFormat mOutputFormat; 51 private int mInputChannels; 52 53 public ResizeFilter(String name) { 54 super(name); 55 } 56 57 @Override 58 public void setupPorts() { 59 addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 60 addOutputBasedOnInput("image", "image"); 61 } 62 63 @Override 64 public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 65 return inputFormat; 66 } 67 68 protected void createProgram(FilterContext context, FrameFormat format) { 69 if (mLastFormat != null && mLastFormat.getTarget() == format.getTarget()) return; 70 mLastFormat = format; 71 switch (format.getTarget()) { 72 case FrameFormat.TARGET_NATIVE: 73 throw new RuntimeException("Native ResizeFilter not implemented yet!"); 74 75 76 case FrameFormat.TARGET_GPU: 77 ShaderProgram prog = ShaderProgram.createIdentity(context); 78 mProgram = prog; 79 break; 80 81 default: 82 throw new RuntimeException("ResizeFilter could not create suitable program!"); 83 } 84 } 85 @Override 86 public void process(FilterContext env) { 87 // Get input frame 88 Frame input = pullInput("image"); 89 createProgram(env, input.getFormat()); 90 91 // Create output frame 92 MutableFrameFormat outputFormat = input.getFormat().mutableCopy(); 93 if (mKeepAspectRatio) { 94 FrameFormat inputFormat = input.getFormat(); 95 mOHeight = mOWidth * inputFormat.getHeight() / inputFormat.getWidth(); 96 } 97 outputFormat.setDimensions(mOWidth, mOHeight); 98 Frame output = env.getFrameManager().newFrame(outputFormat); 99 100 // Process 101 if (mGenerateMipMap) { 102 GLFrame mipmapped = (GLFrame)env.getFrameManager().newFrame(input.getFormat()); 103 mipmapped.setTextureParameter(GLES20.GL_TEXTURE_MIN_FILTER, 104 GLES20.GL_LINEAR_MIPMAP_NEAREST); 105 mipmapped.setDataFromFrame(input); 106 mipmapped.generateMipMap(); 107 mProgram.process(mipmapped, output); 108 mipmapped.release(); 109 } else { 110 mProgram.process(input, output); 111 } 112 113 // Push output 114 pushOutput("image", output); 115 116 // Release pushed frame 117 output.release(); 118 } 119 120 121} 122