16570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin/* 26570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * Copyright (C) 2011 The Android Open Source Project 36570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * 46570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * Licensed under the Apache License, Version 2.0 (the "License"); 56570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * you may not use this file except in compliance with the License. 66570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * You may obtain a copy of the License at 76570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * 86570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * http://www.apache.org/licenses/LICENSE-2.0 96570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * 106570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * Unless required by applicable law or agreed to in writing, software 116570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * distributed under the License is distributed on an "AS IS" BASIS, 126570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 136570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * See the License for the specific language governing permissions and 146570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin * limitations under the License. 156570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin */ 166570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 176570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linpackage android.filterpacks.imageproc; 186570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 196570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.Filter; 206570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.FilterContext; 216570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.Frame; 226570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.FrameFormat; 236570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.GenerateFieldPort; 246570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.KeyValueMap; 256570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.NativeProgram; 266570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.NativeFrame; 276570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.Program; 286570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.core.ShaderProgram; 296570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linimport android.filterfw.format.ImageFormat; 306570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 316570ec1c3edb8071446791001872d8ba87659200Ruei-sung Linpublic class VignetteFilter extends Filter { 326570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 33ebdfce054988de002387c0bcedde7fda8a4f0eb0Marius Renn @GenerateFieldPort(name = "scale", hasDefault = true) 34d94917b4c773773430b2c4e0bc3ad48162d8a8f7Ruei-sung Lin private float mScale = 0f; 356570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 366570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin @GenerateFieldPort(name = "tile_size", hasDefault = true) 376570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private int mTileSize = 640; 386570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 396570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private Program mProgram; 406570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 416570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private int mWidth = 0; 426570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private int mHeight = 0; 436570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private int mTarget = FrameFormat.TARGET_UNSPECIFIED; 446570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 456570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private final float mSlope = 20.0f; 466570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private final float mShade = 0.85f; 476570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 486570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private final String mVignetteShader = 496570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "precision mediump float;\n" + 506570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "uniform sampler2D tex_sampler_0;\n" + 516570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "uniform float range;\n" + 526570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "uniform float inv_max_dist;\n" + 536570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "uniform float shade;\n" + 546570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "uniform vec2 center;\n" + 556570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "varying vec2 v_texcoord;\n" + 566570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "void main() {\n" + 576570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin " const float slope = 20.0;\n" + 586570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin " float dist = distance(gl_FragCoord.xy, center);\n" + 596570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin " float lumen = shade / (1.0 + exp((dist * inv_max_dist - range) * slope)) + (1.0 - shade);\n" + 606570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + 616570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin " gl_FragColor = vec4(color.rgb * lumen, color.a);\n" + 626570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "}\n"; 636570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 646570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin public VignetteFilter(String name) { 656570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin super(name); 666570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 676570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 686570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin @Override 696570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin public void setupPorts() { 706570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 716570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin addOutputBasedOnInput("image", "image"); 726570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 736570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 746570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin @Override 756570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 766570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin return inputFormat; 776570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 786570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 796570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin public void initProgram(FilterContext context, int target) { 806570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin switch (target) { 816570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin case FrameFormat.TARGET_GPU: 826570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin ShaderProgram shaderProgram = new ShaderProgram(context, mVignetteShader); 836570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin shaderProgram.setMaximumTileSize(mTileSize); 846570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mProgram = shaderProgram; 856570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin break; 866570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 876570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin default: 886570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin throw new RuntimeException("Filter Sharpen does not support frames of " + 896570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin "target " + target + "!"); 906570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 916570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mTarget = target; 926570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 936570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 946570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private void initParameters() { 956570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin if (mProgram != null) { 966570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin float centerX = (float) (0.5 * mWidth); 976570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin float centerY = (float) (0.5 * mHeight); 986570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin float center[] = {centerX, centerY}; 996570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin float max_dist = (float) Math.sqrt(centerX * centerX + centerY * centerY); 1006570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1016570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mProgram.setHostValue("center", center); 1026570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mProgram.setHostValue("inv_max_dist", 1.0f / max_dist); 1036570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mProgram.setHostValue("shade", mShade); 1046570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1056570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin updateParameters(); 1066570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1076570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1086570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1096570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin private void updateParameters() { 110d94917b4c773773430b2c4e0bc3ad48162d8a8f7Ruei-sung Lin // The 'range' is between 1.3 to 0.6. When scale is zero then range is 1.3 111d94917b4c773773430b2c4e0bc3ad48162d8a8f7Ruei-sung Lin // which means no vignette at all because the luminousity difference is 112d94917b4c773773430b2c4e0bc3ad48162d8a8f7Ruei-sung Lin // less than 1/256 and will cause nothing. 113d94917b4c773773430b2c4e0bc3ad48162d8a8f7Ruei-sung Lin mProgram.setHostValue("range", 1.30f - (float) Math.sqrt(mScale) * 0.7f); 1146570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1156570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1166570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin @Override 1176570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin public void fieldPortValueUpdated(String name, FilterContext context) { 1186570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin if (mProgram != null) { 1196570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin updateParameters(); 1206570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1216570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1226570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1236570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin @Override 1246570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin public void process(FilterContext context) { 1256570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin // Get input frame 1266570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin Frame input = pullInput("image"); 1276570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin FrameFormat inputFormat = input.getFormat(); 1286570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1296570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin // Create program if not created already 1306570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin if (mProgram == null || inputFormat.getTarget() != mTarget) { 1316570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin initProgram(context, inputFormat.getTarget()); 1326570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1336570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1346570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin // Check if the frame size has changed 1356570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin if (inputFormat.getWidth() != mWidth || inputFormat.getHeight() != mHeight) { 1366570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mWidth = inputFormat.getWidth(); 1376570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mHeight = inputFormat.getHeight(); 1386570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin initParameters(); 1396570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1406570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1416570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin // Create output frame 1426570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin Frame output = context.getFrameManager().newFrame(inputFormat); 1436570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1446570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin // Process 1456570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin mProgram.process(input, output); 1466570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1476570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin // Push output 1486570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin pushOutput("image", output); 1496570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin 1506570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin // Release pushed frame 1516570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin output.release(); 1526570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin } 1536570ec1c3edb8071446791001872d8ba87659200Ruei-sung Lin} 154