| /* |
| * 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.GenerateFieldPort; |
| import android.filterfw.core.MutableFrameFormat; |
| import android.filterfw.core.ShaderProgram; |
| import android.filterfw.format.ImageFormat; |
| import android.filterfw.geometry.Point; |
| import android.filterfw.geometry.Quad; |
| |
| /** |
| * The FixedRotationFilter rotates the input image clockwise, it only accepts |
| * 4 rotation angles: 0, 90, 180, 270 |
| * @hide |
| */ |
| public class FixedRotationFilter extends Filter { |
| |
| @GenerateFieldPort(name = "rotation", hasDefault = true) |
| private int mRotation = 0; |
| |
| private ShaderProgram mProgram = null; |
| |
| public FixedRotationFilter(String name) { |
| super(name); |
| } |
| |
| @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; |
| } |
| |
| @Override |
| public void process(FilterContext context) { |
| Frame input = pullInput("image"); |
| if (mRotation == 0) { |
| pushOutput("image", input); |
| return; |
| } |
| FrameFormat inputFormat = input.getFormat(); |
| |
| // Create program if not created already |
| if (mProgram == null) { |
| mProgram = ShaderProgram.createIdentity(context); |
| } |
| MutableFrameFormat outputFormat = inputFormat.mutableCopy(); |
| int width = inputFormat.getWidth(); |
| int height = inputFormat.getHeight(); |
| Point p1 = new Point(0.0f, 0.0f); |
| Point p2 = new Point(1.0f, 0.0f); |
| Point p3 = new Point(0.0f, 1.0f); |
| Point p4 = new Point(1.0f, 1.0f); |
| Quad sourceRegion; |
| switch (((int)Math.round(mRotation / 90f)) % 4) { |
| case 1: |
| sourceRegion = new Quad(p3,p1,p4,p2); |
| outputFormat.setDimensions(height, width); |
| break; |
| case 2: |
| sourceRegion = new Quad(p4,p3,p2,p1); |
| break; |
| case 3: |
| sourceRegion = new Quad(p2,p4,p1,p3); |
| outputFormat.setDimensions(height, width); |
| break; |
| case 0: |
| default: |
| sourceRegion = new Quad(p1,p2,p3,p4); |
| break; |
| } |
| // Create output frame |
| Frame output = context.getFrameManager().newFrame(outputFormat); |
| |
| // Set the source region |
| mProgram.setSourceRegion(sourceRegion); |
| |
| // Process |
| mProgram.process(input, output); |
| |
| // Push output |
| pushOutput("image", output); |
| |
| // Release pushed frame |
| output.release(); |
| } |
| } |