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/*
* 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" +
" if (mask.a > 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;
mProgram.setHostValue("intensity", DEFAULT_RED_INTENSITY);
break;
default:
throw new RuntimeException("Filter RedEye does not support frames of " +
"target " + target + "!");
}
mTarget = target;
}
@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();
}
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 createRedEyeFrame(FilterContext context) {
int bitmapWidth = mWidth / 2;
int bitmapHeight = mHeight / 2;
Bitmap redEyeBitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Bitmap.Config.ARGB_8888);
mCanvas.setBitmap(redEyeBitmap);
mPaint.setColor(Color.WHITE);
mRadius = Math.max(MIN_RADIUS, RADIUS_RATIO * Math.min(bitmapWidth, bitmapHeight));
for (int i = 0; i < mCenters.length; i += 2) {
mCanvas.drawCircle(mCenters[i] * bitmapWidth, mCenters[i + 1] * bitmapHeight,
mRadius, mPaint);
}
FrameFormat format = ImageFormat.create(bitmapWidth, bitmapHeight,
ImageFormat.COLORSPACE_RGBA,
FrameFormat.TARGET_GPU);
mRedEyeFrame = context.getFrameManager().newFrame(format);
mRedEyeFrame.setBitmap(redEyeBitmap);
redEyeBitmap.recycle();
}
private void updateProgramParams() {
if ( mCenters.length % 2 == 1) {
throw new RuntimeException("The size of center array must be even.");
}
}
}
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