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 package android.filterpacks.imageproc; 18 19 import android.filterfw.core.Filter; 20 import android.filterfw.core.FilterContext; 21 import android.filterfw.core.Frame; 22 import android.filterfw.core.FrameFormat; 23 import android.filterfw.core.GenerateFieldPort; 24 import android.filterfw.core.KeyValueMap; 25 import android.filterfw.core.NativeProgram; 26 import android.filterfw.core.NativeFrame; 27 import android.filterfw.core.Program; 28 import android.filterfw.core.ShaderProgram; 29 import android.filterfw.format.ImageFormat; 30 import android.util.Log; 31 32 public class ColorTemperatureFilter extends Filter { 33 34 @GenerateFieldPort(name = "scale", hasDefault = true) 35 private float mScale = 0.5f; 36 37 @GenerateFieldPort(name = "tile_size", hasDefault = true) 38 private int mTileSize = 640; 39 40 private Program mProgram; 41 private int mTarget = FrameFormat.TARGET_UNSPECIFIED; 42 43 private final String mColorTemperatureShader = 44 "precision mediump float;\n" + 45 "uniform sampler2D tex_sampler_0;\n" + 46 "uniform float scale;\n" + 47 "varying vec2 v_texcoord;\n" + 48 "void main() {\n" + 49 " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + 50 " vec3 new_color = color.rgb;\n" + 51 " new_color.r = color.r + color.r * ( 1.0 - color.r) * scale;\n" + 52 " new_color.b = color.b - color.b * ( 1.0 - color.b) * scale;\n" + 53 " if (scale > 0.0) { \n" + 54 " new_color.g = color.g + color.g * ( 1.0 - color.g) * scale * 0.25;\n" + 55 " }\n" + 56 " float max_value = max(new_color.r, max(new_color.g, new_color.b));\n" + 57 " if (max_value > 1.0) { \n" + 58 " new_color /= max_value;\n" + 59 " } \n" + 60 " gl_FragColor = vec4(new_color, color.a);\n" + 61 "}\n"; 62 63 public ColorTemperatureFilter(String name) { 64 super(name); 65 } 66 67 @Override 68 public void setupPorts() { 69 addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 70 addOutputBasedOnInput("image", "image"); 71 } 72 73 @Override 74 public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 75 return inputFormat; 76 } 77 78 public void initProgram(FilterContext context, int target) { 79 switch (target) { 80 case FrameFormat.TARGET_GPU: 81 ShaderProgram shaderProgram = new ShaderProgram(context, mColorTemperatureShader); 82 shaderProgram.setMaximumTileSize(mTileSize); 83 mProgram = shaderProgram; 84 break; 85 86 default: 87 throw new RuntimeException("Filter Sharpen does not support frames of " + 88 "target " + target + "!"); 89 } 90 mTarget = target; 91 } 92 93 @Override 94 public void process(FilterContext context) { 95 // Get input frame 96 Frame input = pullInput("image"); 97 FrameFormat inputFormat = input.getFormat(); 98 99 // Create program if not created already 100 if (mProgram == null || inputFormat.getTarget() != mTarget) { 101 initProgram(context, inputFormat.getTarget()); 102 updateParameters(); 103 } 104 105 // Create output frame 106 Frame output = context.getFrameManager().newFrame(inputFormat); 107 108 // Process 109 mProgram.process(input, output); 110 111 // Push output 112 pushOutput("image", output); 113 114 // Release pushed frame 115 output.release(); 116 } 117 118 private void updateParameters() { 119 mProgram.setHostValue("scale", 2.0f * mScale - 1.0f); 120 } 121 122 @Override 123 public void fieldPortValueUpdated(String name, FilterContext context) { 124 if (mProgram != null) { 125 updateParameters(); 126 } 127 } 128 } 129