| /* |
| * 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.KeyValueMap; |
| import android.filterfw.core.NativeProgram; |
| import android.filterfw.core.NativeFrame; |
| import android.filterfw.core.Program; |
| import android.filterfw.core.ShaderProgram; |
| import android.filterfw.format.ImageFormat; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.PointF; |
| import android.util.Log; |
| |
| /** |
| * @hide |
| */ |
| public class RedEyeFilter extends Filter { |
| |
| private static final float RADIUS_RATIO = 0.06f; |
| private static final float MIN_RADIUS = 10.0f; |
| private static final float DEFAULT_RED_INTENSITY = 1.30f; |
| |
| @GenerateFieldPort(name = "centers") |
| private float[] mCenters; |
| |
| @GenerateFieldPort(name = "tile_size", hasDefault = true) |
| private int mTileSize = 640; |
| |
| private Frame mRedEyeFrame; |
| private Bitmap mRedEyeBitmap; |
| |
| private final Canvas mCanvas = new Canvas(); |
| private final Paint mPaint = new Paint(); |
| |
| private float mRadius; |
| |
| private int mWidth = 0; |
| private int mHeight = 0; |
| |
| private Program mProgram; |
| private int mTarget = FrameFormat.TARGET_UNSPECIFIED; |
| |
| private final String mRedEyeShader = |
| "precision mediump float;\n" + |
| "uniform sampler2D tex_sampler_0;\n" + |
| "uniform sampler2D tex_sampler_1;\n" + |
| "uniform float intensity;\n" + |
| "varying vec2 v_texcoord;\n" + |
| "void main() {\n" + |
| " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + |
| " vec4 mask = texture2D(tex_sampler_1, v_texcoord);\n" + |
| " gl_FragColor = vec4(mask.a, mask.a, mask.a, 1.0) * intensity + color * (1.0 - intensity);\n" + |
| " if (mask.a > 0.0) {\n" + |
| " gl_FragColor.r = 0.0;\n" + |
| " float green_blue = color.g + color.b;\n" + |
| " float red_intensity = color.r / green_blue;\n" + |
| " if (red_intensity > intensity) {\n" + |
| " color.r = 0.5 * green_blue;\n" + |
| " }\n" + |
| " }\n" + |
| " gl_FragColor = color;\n" + |
| "}\n"; |
| |
| public RedEyeFilter(String name) { |
| super(name); |
| } |
| |
| @Override |
| public void setupPorts() { |
| addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); |
| addOutputBasedOnInput("image", "image"); |
| } |
| |
| @Override |
| public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { |
| return inputFormat; |
| } |
| |
| public void initProgram(FilterContext context, int target) { |
| switch (target) { |
| case FrameFormat.TARGET_GPU: |
| ShaderProgram shaderProgram = new ShaderProgram(context, mRedEyeShader); |
| shaderProgram.setMaximumTileSize(mTileSize); |
| mProgram = shaderProgram; |
| break; |
| |
| default: |
| throw new RuntimeException("Filter RedEye does not support frames of " + |
| "target " + target + "!"); |
| } |
| mTarget = target; |
| } |
| |
| @Override |
| public void tearDown(FilterContext context) { |
| if (mRedEyeBitmap != null) { |
| mRedEyeBitmap.recycle(); |
| mRedEyeBitmap = null; |
| } |
| } |
| |
| @Override |
| public void process(FilterContext context) { |
| // Get input frame |
| Frame input = pullInput("image"); |
| FrameFormat inputFormat = input.getFormat(); |
| |
| // Create output frame |
| Frame output = context.getFrameManager().newFrame(inputFormat); |
| |
| // Create program if not created already |
| if (mProgram == null || inputFormat.getTarget() != mTarget) { |
| initProgram(context, inputFormat.getTarget()); |
| } |
| |
| // Check if the frame size has changed |
| if (inputFormat.getWidth() != mWidth || inputFormat.getHeight() != mHeight) { |
| mWidth = inputFormat.getWidth(); |
| mHeight = inputFormat.getHeight(); |
| |
| createRedEyeBitmap(); |
| } |
| |
| createRedEyeFrame(context); |
| |
| // Process |
| Frame[] inputs = {input, mRedEyeFrame}; |
| mProgram.process(inputs, output); |
| |
| // Push output |
| pushOutput("image", output); |
| |
| // Release pushed frame |
| output.release(); |
| |
| // Release unused frame |
| mRedEyeFrame.release(); |
| mRedEyeFrame = null; |
| } |
| |
| @Override |
| public void fieldPortValueUpdated(String name, FilterContext context) { |
| if (mProgram != null) { |
| updateProgramParams(); |
| } |
| } |
| |
| private void createRedEyeBitmap() { |
| if (mRedEyeBitmap != null) { |
| mRedEyeBitmap.recycle(); |
| } |
| |
| int bitmapWidth = mWidth / 2; |
| int bitmapHeight = mHeight / 2; |
| |
| mRedEyeBitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888); |
| mCanvas.setBitmap(mRedEyeBitmap); |
| mPaint.setColor(Color.WHITE); |
| mRadius = Math.max(MIN_RADIUS, RADIUS_RATIO * Math.min(bitmapWidth, bitmapHeight)); |
| |
| updateProgramParams(); |
| } |
| |
| private void createRedEyeFrame(FilterContext context) { |
| FrameFormat format = ImageFormat.create(mRedEyeBitmap.getWidth() , |
| mRedEyeBitmap.getHeight(), |
| ImageFormat.COLORSPACE_RGBA, |
| FrameFormat.TARGET_GPU); |
| mRedEyeFrame = context.getFrameManager().newFrame(format); |
| mRedEyeFrame.setBitmap(mRedEyeBitmap); |
| } |
| |
| private void updateProgramParams() { |
| mProgram.setHostValue("intensity", DEFAULT_RED_INTENSITY); |
| |
| if ( mCenters.length % 2 == 1) { |
| throw new RuntimeException("The size of center array must be even."); |
| } |
| |
| if (mRedEyeBitmap != null) { |
| for (int i = 0; i < mCenters.length; i += 2) { |
| mCanvas.drawCircle(mCenters[i] * mRedEyeBitmap.getWidth(), |
| mCenters[i + 1] * mRedEyeBitmap.getHeight(), |
| mRadius, mPaint); |
| } |
| } |
| } |
| } |