Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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 com.android.launcher2; |
| 18 | |
| 19 | import android.graphics.Bitmap; |
| 20 | import android.graphics.BlurMaskFilter; |
| 21 | import android.graphics.Canvas; |
Joe Onorato | 4be866d | 2010-10-10 11:26:02 -0700 | [diff] [blame] | 22 | import android.graphics.MaskFilter; |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 23 | import android.graphics.Paint; |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 24 | import android.graphics.PorterDuff; |
| 25 | import android.graphics.PorterDuffXfermode; |
| 26 | |
| 27 | public class HolographicOutlineHelper { |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 28 | private final Paint mHolographicPaint = new Paint(); |
Joe Onorato | 4be866d | 2010-10-10 11:26:02 -0700 | [diff] [blame] | 29 | private final Paint mBlurPaint = new Paint(); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 30 | private final Paint mErasePaint = new Paint(); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 31 | |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 32 | public static final int MAX_OUTER_BLUR_RADIUS; |
Winson Chung | 1908d07 | 2011-02-24 18:09:44 -0800 | [diff] [blame] | 33 | public static final int MIN_OUTER_BLUR_RADIUS; |
Joe Onorato | 4be866d | 2010-10-10 11:26:02 -0700 | [diff] [blame] | 34 | |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 35 | private static final BlurMaskFilter sExtraThickOuterBlurMaskFilter; |
Patrick Dubroy | 8e58e91 | 2010-10-14 13:21:48 -0700 | [diff] [blame] | 36 | private static final BlurMaskFilter sThickOuterBlurMaskFilter; |
| 37 | private static final BlurMaskFilter sMediumOuterBlurMaskFilter; |
| 38 | private static final BlurMaskFilter sThinOuterBlurMaskFilter; |
| 39 | private static final BlurMaskFilter sThickInnerBlurMaskFilter; |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 40 | private static final BlurMaskFilter sExtraThickInnerBlurMaskFilter; |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 41 | private static final BlurMaskFilter sMediumInnerBlurMaskFilter; |
| 42 | |
| 43 | private static final int THICK = 0; |
| 44 | private static final int MEDIUM = 1; |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 45 | private static final int EXTRA_THICK = 2; |
Patrick Dubroy | 8e58e91 | 2010-10-14 13:21:48 -0700 | [diff] [blame] | 46 | |
| 47 | static { |
| 48 | final float scale = LauncherApplication.getScreenDensity(); |
| 49 | |
Winson Chung | 1908d07 | 2011-02-24 18:09:44 -0800 | [diff] [blame] | 50 | MIN_OUTER_BLUR_RADIUS = (int) (scale * 1.0f); |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 51 | MAX_OUTER_BLUR_RADIUS = (int) (scale * 12.0f); |
Patrick Dubroy | 8e58e91 | 2010-10-14 13:21:48 -0700 | [diff] [blame] | 52 | |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 53 | sExtraThickOuterBlurMaskFilter = new BlurMaskFilter(scale * 12.0f, BlurMaskFilter.Blur.OUTER); |
| 54 | sThickOuterBlurMaskFilter = new BlurMaskFilter(scale * 6.0f, BlurMaskFilter.Blur.OUTER); |
Patrick Dubroy | 8e58e91 | 2010-10-14 13:21:48 -0700 | [diff] [blame] | 55 | sMediumOuterBlurMaskFilter = new BlurMaskFilter(scale * 2.0f, BlurMaskFilter.Blur.OUTER); |
| 56 | sThinOuterBlurMaskFilter = new BlurMaskFilter(scale * 1.0f, BlurMaskFilter.Blur.OUTER); |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 57 | sExtraThickInnerBlurMaskFilter = new BlurMaskFilter(scale * 6.0f, BlurMaskFilter.Blur.NORMAL); |
Patrick Dubroy | 8e58e91 | 2010-10-14 13:21:48 -0700 | [diff] [blame] | 58 | sThickInnerBlurMaskFilter = new BlurMaskFilter(scale * 4.0f, BlurMaskFilter.Blur.NORMAL); |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 59 | sMediumInnerBlurMaskFilter = new BlurMaskFilter(scale * 2.0f, BlurMaskFilter.Blur.NORMAL); |
Patrick Dubroy | 8e58e91 | 2010-10-14 13:21:48 -0700 | [diff] [blame] | 60 | } |
Joe Onorato | 4be866d | 2010-10-10 11:26:02 -0700 | [diff] [blame] | 61 | |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 62 | HolographicOutlineHelper() { |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 63 | mHolographicPaint.setFilterBitmap(true); |
| 64 | mHolographicPaint.setAntiAlias(true); |
Joe Onorato | 4be866d | 2010-10-10 11:26:02 -0700 | [diff] [blame] | 65 | mBlurPaint.setFilterBitmap(true); |
| 66 | mBlurPaint.setAntiAlias(true); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 67 | mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); |
| 68 | mErasePaint.setFilterBitmap(true); |
| 69 | mErasePaint.setAntiAlias(true); |
| 70 | } |
| 71 | |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 72 | /** |
| 73 | * Returns the interpolated holographic highlight alpha for the effect we want when scrolling |
| 74 | * pages. |
| 75 | */ |
Winson Chung | b44b524 | 2011-06-13 11:32:14 -0700 | [diff] [blame] | 76 | public static float highlightAlphaInterpolator(float r) { |
| 77 | float maxAlpha = 0.6f; |
Winson Chung | e8878e3 | 2010-09-15 20:37:09 -0700 | [diff] [blame] | 78 | return (float) Math.pow(maxAlpha * (1.0f - r), 1.5f); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Returns the interpolated view alpha for the effect we want when scrolling pages. |
| 83 | */ |
Winson Chung | b44b524 | 2011-06-13 11:32:14 -0700 | [diff] [blame] | 84 | public static float viewAlphaInterpolator(float r) { |
Winson Chung | e8878e3 | 2010-09-15 20:37:09 -0700 | [diff] [blame] | 85 | final float pivot = 0.95f; |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 86 | if (r < pivot) { |
Winson Chung | e8878e3 | 2010-09-15 20:37:09 -0700 | [diff] [blame] | 87 | return (float) Math.pow(r / pivot, 1.5f); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 88 | } else { |
| 89 | return 1.0f; |
| 90 | } |
| 91 | } |
| 92 | |
Patrick Dubroy | 8e58e91 | 2010-10-14 13:21:48 -0700 | [diff] [blame] | 93 | /** |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 94 | * Applies a more expensive and accurate outline to whatever is currently drawn in a specified |
| 95 | * bitmap. |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 96 | */ |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 97 | void applyExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color, |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 98 | int outlineColor, int thickness) { |
Michael Jurka | 8c3339b | 2012-06-14 16:18:21 -0700 | [diff] [blame^] | 99 | applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, true, |
Peter Ng | 8db7000 | 2011-10-25 15:40:08 -0700 | [diff] [blame] | 100 | thickness); |
| 101 | } |
| 102 | void applyExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color, |
Michael Jurka | 8c3339b | 2012-06-14 16:18:21 -0700 | [diff] [blame^] | 103 | int outlineColor, boolean clipAlpha, int thickness) { |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 104 | |
| 105 | // We start by removing most of the alpha channel so as to ignore shadows, and |
| 106 | // other types of partial transparency when defining the shape of the object |
Michael Jurka | 8c3339b | 2012-06-14 16:18:21 -0700 | [diff] [blame^] | 107 | if (clipAlpha) { |
| 108 | int[] srcBuffer = new int[srcDst.getWidth() * srcDst.getHeight()]; |
| 109 | srcDst.getPixels(srcBuffer, |
| 110 | 0, srcDst.getWidth(), 0, 0, srcDst.getWidth(), srcDst.getHeight()); |
| 111 | for (int i = 0; i < srcBuffer.length; i++) { |
| 112 | final int alpha = srcBuffer[i] >>> 24; |
| 113 | if (alpha < 188) { |
| 114 | srcBuffer[i] = 0; |
| 115 | } |
| 116 | } |
| 117 | srcDst.setPixels(srcBuffer, |
| 118 | 0, srcDst.getWidth(), 0, 0, srcDst.getWidth(), srcDst.getHeight()); |
Peter Ng | 8db7000 | 2011-10-25 15:40:08 -0700 | [diff] [blame] | 119 | } |
Michael Jurka | 8c3339b | 2012-06-14 16:18:21 -0700 | [diff] [blame^] | 120 | Bitmap glowShape = srcDst.extractAlpha(); |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 121 | |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 122 | // calculate the outer blur first |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 123 | BlurMaskFilter outerBlurMaskFilter; |
| 124 | switch (thickness) { |
| 125 | case EXTRA_THICK: |
| 126 | outerBlurMaskFilter = sExtraThickOuterBlurMaskFilter; |
| 127 | break; |
| 128 | case THICK: |
| 129 | outerBlurMaskFilter = sThickOuterBlurMaskFilter; |
| 130 | break; |
| 131 | case MEDIUM: |
| 132 | outerBlurMaskFilter = sMediumOuterBlurMaskFilter; |
| 133 | break; |
| 134 | default: |
| 135 | throw new RuntimeException("Invalid blur thickness"); |
| 136 | } |
| 137 | mBlurPaint.setMaskFilter(outerBlurMaskFilter); |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 138 | int[] outerBlurOffset = new int[2]; |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 139 | Bitmap thickOuterBlur = glowShape.extractAlpha(mBlurPaint, outerBlurOffset); |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 140 | if (thickness == EXTRA_THICK) { |
| 141 | mBlurPaint.setMaskFilter(sMediumOuterBlurMaskFilter); |
| 142 | } else { |
| 143 | mBlurPaint.setMaskFilter(sThinOuterBlurMaskFilter); |
| 144 | } |
| 145 | |
| 146 | int[] brightOutlineOffset = new int[2]; |
| 147 | Bitmap brightOutline = glowShape.extractAlpha(mBlurPaint, brightOutlineOffset); |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 148 | |
| 149 | // calculate the inner blur |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 150 | srcDstCanvas.setBitmap(glowShape); |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 151 | srcDstCanvas.drawColor(0xFF000000, PorterDuff.Mode.SRC_OUT); |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 152 | BlurMaskFilter innerBlurMaskFilter; |
| 153 | switch (thickness) { |
| 154 | case EXTRA_THICK: |
| 155 | innerBlurMaskFilter = sExtraThickInnerBlurMaskFilter; |
| 156 | break; |
| 157 | case THICK: |
| 158 | innerBlurMaskFilter = sThickInnerBlurMaskFilter; |
| 159 | break; |
| 160 | case MEDIUM: |
| 161 | innerBlurMaskFilter = sMediumInnerBlurMaskFilter; |
| 162 | break; |
| 163 | default: |
| 164 | throw new RuntimeException("Invalid blur thickness"); |
| 165 | } |
| 166 | mBlurPaint.setMaskFilter(innerBlurMaskFilter); |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 167 | int[] thickInnerBlurOffset = new int[2]; |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 168 | Bitmap thickInnerBlur = glowShape.extractAlpha(mBlurPaint, thickInnerBlurOffset); |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 169 | |
| 170 | // mask out the inner blur |
| 171 | srcDstCanvas.setBitmap(thickInnerBlur); |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 172 | srcDstCanvas.drawBitmap(glowShape, -thickInnerBlurOffset[0], |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 173 | -thickInnerBlurOffset[1], mErasePaint); |
| 174 | srcDstCanvas.drawRect(0, 0, -thickInnerBlurOffset[0], thickInnerBlur.getHeight(), |
| 175 | mErasePaint); |
| 176 | srcDstCanvas.drawRect(0, 0, thickInnerBlur.getWidth(), -thickInnerBlurOffset[1], |
| 177 | mErasePaint); |
| 178 | |
| 179 | // draw the inner and outer blur |
| 180 | srcDstCanvas.setBitmap(srcDst); |
Michael Jurka | 2a9e706 | 2011-01-14 15:48:04 -0800 | [diff] [blame] | 181 | srcDstCanvas.drawColor(0, PorterDuff.Mode.CLEAR); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 182 | mHolographicPaint.setColor(color); |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 183 | srcDstCanvas.drawBitmap(thickInnerBlur, thickInnerBlurOffset[0], thickInnerBlurOffset[1], |
| 184 | mHolographicPaint); |
| 185 | srcDstCanvas.drawBitmap(thickOuterBlur, outerBlurOffset[0], outerBlurOffset[1], |
| 186 | mHolographicPaint); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 187 | |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 188 | // draw the bright outline |
| 189 | mHolographicPaint.setColor(outlineColor); |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 190 | srcDstCanvas.drawBitmap(brightOutline, brightOutlineOffset[0], brightOutlineOffset[1], |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 191 | mHolographicPaint); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 192 | |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 193 | // cleanup |
Adam Cohen | aaf473c | 2011-08-03 12:02:47 -0700 | [diff] [blame] | 194 | srcDstCanvas.setBitmap(null); |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 195 | brightOutline.recycle(); |
Winson Chung | 64a3cd4 | 2010-09-17 16:47:33 -0700 | [diff] [blame] | 196 | thickOuterBlur.recycle(); |
| 197 | thickInnerBlur.recycle(); |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 198 | glowShape.recycle(); |
Michael Jurka | 5f1c509 | 2010-09-03 14:15:02 -0700 | [diff] [blame] | 199 | } |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 200 | |
Michael Jurka | 38b4f7c | 2010-12-14 16:46:39 -0800 | [diff] [blame] | 201 | void applyExtraThickExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color, |
| 202 | int outlineColor) { |
| 203 | applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, EXTRA_THICK); |
| 204 | } |
| 205 | |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 206 | void applyThickExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color, |
| 207 | int outlineColor) { |
| 208 | applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, THICK); |
| 209 | } |
| 210 | |
| 211 | void applyMediumExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color, |
Michael Jurka | 8c3339b | 2012-06-14 16:18:21 -0700 | [diff] [blame^] | 212 | int outlineColor, boolean clipAlpha) { |
| 213 | applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, clipAlpha, |
Peter Ng | 8db7000 | 2011-10-25 15:40:08 -0700 | [diff] [blame] | 214 | MEDIUM); |
| 215 | } |
| 216 | |
| 217 | void applyMediumExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color, |
Adam Cohen | 5bb50bd | 2010-12-03 11:39:55 -0800 | [diff] [blame] | 218 | int outlineColor) { |
| 219 | applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, MEDIUM); |
| 220 | } |
| 221 | |
Winson Chung | 7da1025 | 2010-10-28 16:07:04 -0700 | [diff] [blame] | 222 | } |