| /* |
| * 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.MutableFrameFormat; |
| 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.util.Log; |
| |
| import java.lang.reflect.Field; |
| |
| /** |
| * @hide |
| */ |
| public class ToGrayFilter extends SimpleImageFilter { |
| |
| @GenerateFieldPort(name = "invertSource", hasDefault = true) |
| private boolean mInvertSource = false; |
| |
| @GenerateFieldPort(name = "tile_size", hasDefault = true) |
| private int mTileSize = 640; |
| |
| private MutableFrameFormat mOutputFormat; |
| |
| private static final String mColorToGray4Shader = |
| "precision mediump float;\n" + |
| "uniform sampler2D tex_sampler_0;\n" + |
| "varying vec2 v_texcoord;\n" + |
| "void main() {\n" + |
| " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + |
| " float y = dot(color, vec4(0.299, 0.587, 0.114, 0));\n" + |
| " gl_FragColor = vec4(y, y, y, color.a);\n" + |
| "}\n"; |
| |
| public ToGrayFilter(String name) { |
| super(name, null); |
| } |
| |
| @Override |
| public void setupPorts() { |
| addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA, |
| FrameFormat.TARGET_GPU)); |
| addOutputBasedOnInput("image", "image"); |
| } |
| |
| @Override |
| protected Program getNativeProgram(FilterContext context) { |
| throw new RuntimeException("Native toGray not implemented yet!"); |
| } |
| |
| @Override |
| protected Program getShaderProgram(FilterContext context) { |
| int inputChannels = getInputFormat("image").getBytesPerSample(); |
| if (inputChannels != 4) { |
| throw new RuntimeException("Unsupported GL input channels: " + |
| inputChannels + "! Channels must be 4!"); |
| } |
| ShaderProgram program = new ShaderProgram(context, mColorToGray4Shader); |
| program.setMaximumTileSize(mTileSize); |
| if (mInvertSource) |
| program.setSourceRect(0.0f, 1.0f, 1.0f, -1.0f); |
| return program; |
| } |
| |
| } |