Marius Renn | 65953da | 2012-03-27 10:44:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | |
| 18 | package android.filterpacks.imageproc; |
| 19 | |
| 20 | import android.filterfw.core.Filter; |
| 21 | import android.filterfw.core.FilterContext; |
| 22 | import android.filterfw.core.Frame; |
| 23 | import android.filterfw.core.FrameFormat; |
Marius Renn | 65953da | 2012-03-27 10:44:45 -0700 | [diff] [blame] | 24 | import android.filterfw.core.ShaderProgram; |
| 25 | import android.filterfw.geometry.Quad; |
| 26 | import android.filterfw.format.ImageFormat; |
| 27 | import android.filterfw.format.ObjectFormat; |
| 28 | |
Marius Renn | 65953da | 2012-03-27 10:44:45 -0700 | [diff] [blame] | 29 | /** |
| 30 | * @hide |
| 31 | */ |
| 32 | public class DrawOverlayFilter extends Filter { |
| 33 | |
| 34 | private ShaderProgram mProgram; |
| 35 | |
| 36 | public DrawOverlayFilter(String name) { |
| 37 | super(name); |
| 38 | } |
| 39 | |
| 40 | @Override |
| 41 | public void setupPorts() { |
| 42 | FrameFormat imageFormatMask = ImageFormat.create(ImageFormat.COLORSPACE_RGBA, |
| 43 | FrameFormat.TARGET_GPU); |
| 44 | addMaskedInputPort("source", imageFormatMask); |
| 45 | addMaskedInputPort("overlay", imageFormatMask); |
| 46 | addMaskedInputPort("box", ObjectFormat.fromClass(Quad.class, FrameFormat.TARGET_SIMPLE)); |
| 47 | addOutputBasedOnInput("image", "source"); |
| 48 | } |
| 49 | |
| 50 | @Override |
| 51 | public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { |
| 52 | return inputFormat; |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | public void prepare(FilterContext context) { |
| 57 | mProgram = ShaderProgram.createIdentity(context); |
| 58 | } |
| 59 | |
| 60 | @Override |
| 61 | public void process(FilterContext env) { |
| 62 | // Get input frame |
| 63 | Frame sourceFrame = pullInput("source"); |
| 64 | Frame overlayFrame = pullInput("overlay"); |
| 65 | Frame boxFrame = pullInput("box"); |
| 66 | |
| 67 | // Get the box |
| 68 | Quad box = (Quad)boxFrame.getObjectValue(); |
| 69 | box = box.translated(1.0f, 1.0f).scaled(2.0f); |
| 70 | |
| 71 | mProgram.setTargetRegion(box); |
| 72 | |
| 73 | // Create output frame with copy of input |
| 74 | Frame output = env.getFrameManager().newFrame(sourceFrame.getFormat()); |
| 75 | output.setDataFromFrame(sourceFrame); |
| 76 | |
| 77 | // Draw onto output |
| 78 | mProgram.process(overlayFrame, output); |
| 79 | |
| 80 | // Push output |
| 81 | pushOutput("image", output); |
| 82 | |
| 83 | // Release pushed frame |
| 84 | output.release(); |
| 85 | } |
| 86 | } |