| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.filterpacks.imageproc; |
| |
| import android.filterfw.core.Filter; |
| import android.filterfw.core.FilterContext; |
| import android.filterfw.core.Frame; |
| import android.filterfw.core.FrameFormat; |
| import android.filterfw.core.FrameManager; |
| import android.filterfw.core.GenerateFieldPort; |
| import android.filterfw.core.KeyValueMap; |
| import android.filterfw.core.MutableFrameFormat; |
| import android.filterfw.core.Program; |
| import android.filterfw.core.ShaderProgram; |
| import android.filterfw.format.ImageFormat; |
| |
| import android.util.Log; |
| |
| public class ImageStitcher extends Filter { |
| |
| @GenerateFieldPort(name = "xSlices") |
| private int mXSlices; |
| |
| @GenerateFieldPort(name = "ySlices") |
| private int mYSlices; |
| |
| @GenerateFieldPort(name = "padSize") |
| private int mPadSize; |
| |
| private Program mProgram; |
| private Frame mOutputFrame; |
| |
| private int mInputWidth; |
| private int mInputHeight; |
| |
| private int mImageWidth; |
| private int mImageHeight; |
| |
| private int mSliceWidth; |
| private int mSliceHeight; |
| |
| private int mSliceIndex; |
| |
| public ImageStitcher(String name) { |
| super(name); |
| mSliceIndex = 0; |
| } |
| |
| @Override |
| public void setupPorts() { |
| addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA, |
| FrameFormat.TARGET_GPU)); |
| addOutputBasedOnInput("image", "image"); |
| } |
| |
| @Override |
| public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { |
| return inputFormat; |
| } |
| |
| private FrameFormat calcOutputFormatForInput(FrameFormat format) { |
| MutableFrameFormat outputFormat = format.mutableCopy(); |
| |
| mInputWidth = format.getWidth(); |
| mInputHeight = format.getHeight(); |
| |
| mSliceWidth = mInputWidth - 2 * mPadSize; |
| mSliceHeight = mInputHeight - 2 * mPadSize; |
| |
| mImageWidth = mSliceWidth * mXSlices; |
| mImageHeight = mSliceHeight * mYSlices; |
| |
| outputFormat.setDimensions(mImageWidth, mImageHeight); |
| return outputFormat; |
| } |
| |
| @Override |
| public void process(FilterContext context) { |
| // Get input frame |
| Frame input = pullInput("image"); |
| FrameFormat format = input.getFormat(); |
| |
| // Create output frame |
| if (mSliceIndex == 0) { |
| mOutputFrame = context.getFrameManager().newFrame(calcOutputFormatForInput(format)); |
| } else { |
| if ((format.getWidth() != mInputWidth) || |
| (format.getHeight() != mInputHeight)) { |
| // CHECK input format here |
| throw new RuntimeException("Image size should not change."); |
| } |
| } |
| |
| // Create the program if not created already |
| if (mProgram == null) { |
| mProgram = ShaderProgram.createIdentity(context); |
| } |
| |
| // TODO(rslin) : not sure shifting by 0.5 is needed. |
| float x0 = ((float) mPadSize) / mInputWidth; |
| float y0 = ((float) mPadSize) / mInputHeight; |
| |
| int outputOffsetX = (mSliceIndex % mXSlices) * mSliceWidth; |
| int outputOffsetY = (mSliceIndex / mXSlices) * mSliceHeight; |
| |
| float outputWidth = (float) Math.min(mSliceWidth, mImageWidth - outputOffsetX); |
| float outputHeight = (float) Math.min(mSliceHeight, mImageHeight - outputOffsetY); |
| |
| // We need to set the source rect as well because the input are padded images. |
| ((ShaderProgram) mProgram).setSourceRect(x0, y0, |
| outputWidth / mInputWidth, |
| outputHeight / mInputHeight); |
| |
| ((ShaderProgram) mProgram).setTargetRect(((float) outputOffsetX)/ mImageWidth, |
| ((float) outputOffsetY) / mImageHeight, |
| outputWidth / mImageWidth, |
| outputHeight / mImageHeight); |
| |
| // Process this tile |
| mProgram.process(input, mOutputFrame); |
| mSliceIndex++; |
| |
| // Push output |
| if (mSliceIndex == mXSlices * mYSlices) { |
| pushOutput("image", mOutputFrame); |
| mOutputFrame.release(); |
| mSliceIndex = 0; |
| } |
| } |
| } |