| /* |
| * 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.Program; |
| import android.filterfw.core.ShaderProgram; |
| import android.filterfw.geometry.Quad; |
| import android.filterfw.format.ImageFormat; |
| import android.filterfw.format.ObjectFormat; |
| |
| /** |
| * @hide |
| */ |
| public class CropFilter extends Filter { |
| |
| private Program mProgram; |
| private FrameFormat mLastFormat = null; |
| |
| @GenerateFieldPort(name = "owidth") |
| private int mOutputWidth = -1; |
| |
| @GenerateFieldPort(name = "oheight") |
| private int mOutputHeight = -1; |
| |
| @GenerateFieldPort(name = "fillblack") |
| private boolean mFillBlack = false; |
| |
| public CropFilter(String name) { |
| super(name); |
| } |
| |
| private final String mFragShader = |
| "precision mediump float;\n" + |
| "uniform sampler2D tex_sampler_0;\n" + |
| "varying vec2 v_texcoord;\n" + |
| "void main() {\n" + |
| " const vec2 lo = vec2(0.0, 0.0);\n" + |
| " const vec2 hi = vec2(1.0, 1.0);\n" + |
| " const vec4 black = vec4(0.0, 0.0, 0.0, 1.0);\n" + |
| " bool out_of_bounds =\n" + |
| " any(lessThan(v_texcoord, lo)) ||\n" + |
| " any(greaterThan(v_texcoord, hi));\n" + |
| " if (out_of_bounds) {\n" + |
| " gl_FragColor = black;\n" + |
| " } else {\n" + |
| " gl_FragColor = texture2D(tex_sampler_0, v_texcoord);\n" + |
| " }\n" + |
| "}\n"; |
| |
| @Override |
| public void setupPorts() { |
| addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); |
| addMaskedInputPort("box", ObjectFormat.fromClass(Quad.class, FrameFormat.TARGET_SIMPLE)); |
| addOutputBasedOnInput("image", "image"); |
| } |
| |
| @Override |
| public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { |
| // Make sure output size is set to unspecified, as we do not know what we will be resizing |
| // to. |
| MutableFrameFormat outputFormat = inputFormat.mutableCopy(); |
| outputFormat.setDimensions(FrameFormat.SIZE_UNSPECIFIED, FrameFormat.SIZE_UNSPECIFIED); |
| return outputFormat; |
| } |
| |
| protected void createProgram(FilterContext context, FrameFormat format) { |
| // TODO: Add CPU version |
| if (mLastFormat != null && mLastFormat.getTarget() == format.getTarget()) return; |
| mLastFormat = format; |
| mProgram = null; |
| switch (format.getTarget()) { |
| case FrameFormat.TARGET_GPU: |
| if(mFillBlack) |
| mProgram = new ShaderProgram(context, mFragShader); |
| else |
| mProgram = ShaderProgram.createIdentity(context); |
| |
| break; |
| } |
| if (mProgram == null) { |
| throw new RuntimeException("Could not create a program for crop filter " + this + "!"); |
| } |
| } |
| |
| @Override |
| public void process(FilterContext env) { |
| // Get input frame |
| Frame imageFrame = pullInput("image"); |
| Frame boxFrame = pullInput("box"); |
| |
| createProgram(env, imageFrame.getFormat()); |
| |
| // Get the box |
| Quad box = (Quad)boxFrame.getObjectValue(); |
| |
| // Create output format |
| MutableFrameFormat outputFormat = imageFrame.getFormat().mutableCopy(); |
| outputFormat.setDimensions(mOutputWidth == -1 ? outputFormat.getWidth() : mOutputWidth, |
| mOutputHeight == -1 ? outputFormat.getHeight() : mOutputHeight); |
| |
| // Create output frame |
| Frame output = env.getFrameManager().newFrame(outputFormat); |
| |
| // Set the program parameters |
| if (mProgram instanceof ShaderProgram) { |
| ShaderProgram shaderProgram = (ShaderProgram)mProgram; |
| shaderProgram.setSourceRegion(box); |
| } |
| |
| mProgram.process(imageFrame, output); |
| |
| // Push output |
| pushOutput("image", output); |
| |
| // Release pushed frame |
| output.release(); |
| } |
| |
| |
| } |