senorblanco@chromium.org | 60014ca | 2011-11-09 16:05:58 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
djsollen@google.com | 64a0ec3 | 2012-06-12 15:17:27 +0000 | [diff] [blame] | 8 | #include "SkBitmap.h" |
senorblanco@chromium.org | 60014ca | 2011-11-09 16:05:58 +0000 | [diff] [blame] | 9 | #include "SkBlurImageFilter.h" |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 10 | #include "SkColorPriv.h" |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 11 | #include "SkFlattenableBuffers.h" |
robertphillips@google.com | 736dd03 | 2013-07-15 15:06:54 +0000 | [diff] [blame] | 12 | #include "SkGpuBlurUtils.h" |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 13 | #if SK_SUPPORT_GPU |
senorblanco@chromium.org | 302cffb | 2012-08-01 20:16:34 +0000 | [diff] [blame] | 14 | #include "GrContext.h" |
senorblanco@chromium.org | c2594f4 | 2013-01-30 19:08:47 +0000 | [diff] [blame] | 15 | #include "SkImageFilterUtils.h" |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 16 | #endif |
senorblanco@chromium.org | 60014ca | 2011-11-09 16:05:58 +0000 | [diff] [blame] | 17 | |
senorblanco@chromium.org | 54e01b2 | 2011-11-16 18:20:47 +0000 | [diff] [blame] | 18 | SkBlurImageFilter::SkBlurImageFilter(SkFlattenableReadBuffer& buffer) |
| 19 | : INHERITED(buffer) { |
| 20 | fSigma.fWidth = buffer.readScalar(); |
| 21 | fSigma.fHeight = buffer.readScalar(); |
| 22 | } |
| 23 | |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 24 | SkBlurImageFilter::SkBlurImageFilter(SkScalar sigmaX, |
| 25 | SkScalar sigmaY, |
| 26 | SkImageFilter* input, |
senorblanco@chromium.org | b295fb6 | 2013-10-10 13:51:19 +0000 | [diff] [blame^] | 27 | const CropRect* cropRect) |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 28 | : INHERITED(input, cropRect), fSigma(SkSize::Make(sigmaX, sigmaY)) { |
senorblanco@chromium.org | 60014ca | 2011-11-09 16:05:58 +0000 | [diff] [blame] | 29 | SkASSERT(sigmaX >= 0 && sigmaY >= 0); |
| 30 | } |
| 31 | |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 32 | void SkBlurImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
senorblanco@chromium.org | 54e01b2 | 2011-11-16 18:20:47 +0000 | [diff] [blame] | 33 | this->INHERITED::flatten(buffer); |
| 34 | buffer.writeScalar(fSigma.fWidth); |
| 35 | buffer.writeScalar(fSigma.fHeight); |
| 36 | } |
| 37 | |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 38 | static void boxBlurX(const SkBitmap& src, SkBitmap* dst, int kernelSize, |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 39 | int leftOffset, int rightOffset, const SkIRect& bounds) |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 40 | { |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 41 | int width = bounds.width(), height = bounds.height(); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 42 | int rightBorder = SkMin32(rightOffset + 1, width); |
| 43 | for (int y = 0; y < height; ++y) { |
| 44 | int sumA = 0, sumR = 0, sumG = 0, sumB = 0; |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 45 | SkPMColor* p = src.getAddr32(bounds.fLeft, y + bounds.fTop); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 46 | for (int i = 0; i < rightBorder; ++i) { |
| 47 | sumA += SkGetPackedA32(*p); |
| 48 | sumR += SkGetPackedR32(*p); |
| 49 | sumG += SkGetPackedG32(*p); |
| 50 | sumB += SkGetPackedB32(*p); |
| 51 | p++; |
| 52 | } |
| 53 | |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 54 | const SkColor* sptr = src.getAddr32(bounds.fLeft, bounds.fTop + y); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 55 | SkColor* dptr = dst->getAddr32(0, y); |
| 56 | for (int x = 0; x < width; ++x) { |
| 57 | *dptr = SkPackARGB32(sumA / kernelSize, |
| 58 | sumR / kernelSize, |
| 59 | sumG / kernelSize, |
| 60 | sumB / kernelSize); |
| 61 | if (x >= leftOffset) { |
| 62 | SkColor l = *(sptr - leftOffset); |
| 63 | sumA -= SkGetPackedA32(l); |
| 64 | sumR -= SkGetPackedR32(l); |
| 65 | sumG -= SkGetPackedG32(l); |
| 66 | sumB -= SkGetPackedB32(l); |
| 67 | } |
| 68 | if (x + rightOffset + 1 < width) { |
| 69 | SkColor r = *(sptr + rightOffset + 1); |
| 70 | sumA += SkGetPackedA32(r); |
| 71 | sumR += SkGetPackedR32(r); |
| 72 | sumG += SkGetPackedG32(r); |
| 73 | sumB += SkGetPackedB32(r); |
| 74 | } |
| 75 | sptr++; |
| 76 | dptr++; |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | static void boxBlurY(const SkBitmap& src, SkBitmap* dst, int kernelSize, |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 82 | int topOffset, int bottomOffset, const SkIRect& bounds) |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 83 | { |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 84 | int width = bounds.width(), height = bounds.height(); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 85 | int bottomBorder = SkMin32(bottomOffset + 1, height); |
| 86 | int srcStride = src.rowBytesAsPixels(); |
| 87 | int dstStride = dst->rowBytesAsPixels(); |
| 88 | for (int x = 0; x < width; ++x) { |
| 89 | int sumA = 0, sumR = 0, sumG = 0, sumB = 0; |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 90 | SkColor* p = src.getAddr32(bounds.fLeft + x, bounds.fTop); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 91 | for (int i = 0; i < bottomBorder; ++i) { |
| 92 | sumA += SkGetPackedA32(*p); |
| 93 | sumR += SkGetPackedR32(*p); |
| 94 | sumG += SkGetPackedG32(*p); |
| 95 | sumB += SkGetPackedB32(*p); |
| 96 | p += srcStride; |
| 97 | } |
| 98 | |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 99 | const SkColor* sptr = src.getAddr32(bounds.fLeft + x, bounds.fTop); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 100 | SkColor* dptr = dst->getAddr32(x, 0); |
| 101 | for (int y = 0; y < height; ++y) { |
| 102 | *dptr = SkPackARGB32(sumA / kernelSize, |
| 103 | sumR / kernelSize, |
| 104 | sumG / kernelSize, |
| 105 | sumB / kernelSize); |
| 106 | if (y >= topOffset) { |
| 107 | SkColor l = *(sptr - topOffset * srcStride); |
| 108 | sumA -= SkGetPackedA32(l); |
| 109 | sumR -= SkGetPackedR32(l); |
| 110 | sumG -= SkGetPackedG32(l); |
| 111 | sumB -= SkGetPackedB32(l); |
| 112 | } |
| 113 | if (y + bottomOffset + 1 < height) { |
| 114 | SkColor r = *(sptr + (bottomOffset + 1) * srcStride); |
| 115 | sumA += SkGetPackedA32(r); |
| 116 | sumR += SkGetPackedR32(r); |
| 117 | sumG += SkGetPackedG32(r); |
| 118 | sumB += SkGetPackedB32(r); |
| 119 | } |
| 120 | sptr += srcStride; |
| 121 | dptr += dstStride; |
| 122 | } |
| 123 | } |
| 124 | } |
| 125 | |
commit-bot@chromium.org | 7b32070 | 2013-07-10 21:22:18 +0000 | [diff] [blame] | 126 | static void getBox3Params(SkScalar s, int *kernelSize, int* kernelSize3, int *lowOffset, |
| 127 | int *highOffset) |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 128 | { |
schenney@chromium.org | 73f3ded | 2011-12-20 22:31:40 +0000 | [diff] [blame] | 129 | float pi = SkScalarToFloat(SK_ScalarPI); |
| 130 | int d = static_cast<int>(floorf(SkScalarToFloat(s) * 3.0f * sqrtf(2.0f * pi) / 4.0f + 0.5f)); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 131 | *kernelSize = d; |
| 132 | if (d % 2 == 1) { |
| 133 | *lowOffset = *highOffset = (d - 1) / 2; |
| 134 | *kernelSize3 = d; |
| 135 | } else { |
| 136 | *highOffset = d / 2; |
| 137 | *lowOffset = *highOffset - 1; |
| 138 | *kernelSize3 = d + 1; |
| 139 | } |
| 140 | } |
| 141 | |
senorblanco@chromium.org | f1369ce | 2012-08-20 14:53:21 +0000 | [diff] [blame] | 142 | bool SkBlurImageFilter::onFilterImage(Proxy* proxy, |
| 143 | const SkBitmap& source, const SkMatrix& ctm, |
| 144 | SkBitmap* dst, SkIPoint* offset) { |
senorblanco@chromium.org | 6840076 | 2013-05-24 15:04:07 +0000 | [diff] [blame] | 145 | SkBitmap src = source; |
| 146 | if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctm, &src, offset)) { |
| 147 | return false; |
| 148 | } |
| 149 | |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 150 | if (src.config() != SkBitmap::kARGB_8888_Config) { |
| 151 | return false; |
| 152 | } |
| 153 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 154 | SkAutoLockPixels alp(src); |
| 155 | if (!src.getPixels()) { |
| 156 | return false; |
| 157 | } |
| 158 | |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 159 | SkIRect srcBounds, dstBounds; |
| 160 | src.getBounds(&srcBounds); |
senorblanco@chromium.org | fbaea53 | 2013-08-27 21:37:01 +0000 | [diff] [blame] | 161 | if (!this->applyCropRect(&srcBounds, ctm)) { |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 162 | return false; |
| 163 | } |
| 164 | |
| 165 | dst->setConfig(src.config(), srcBounds.width(), srcBounds.height()); |
| 166 | dst->getBounds(&dstBounds); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 167 | dst->allocPixels(); |
| 168 | int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX; |
| 169 | int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY; |
| 170 | getBox3Params(fSigma.width(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX); |
| 171 | getBox3Params(fSigma.height(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY); |
| 172 | |
| 173 | if (kernelSizeX < 0 || kernelSizeY < 0) { |
| 174 | return false; |
| 175 | } |
| 176 | |
| 177 | if (kernelSizeX == 0 && kernelSizeY == 0) { |
| 178 | src.copyTo(dst, dst->config()); |
| 179 | return true; |
| 180 | } |
| 181 | |
| 182 | SkBitmap temp; |
| 183 | temp.setConfig(dst->config(), dst->width(), dst->height()); |
| 184 | if (!temp.allocPixels()) { |
| 185 | return false; |
| 186 | } |
| 187 | |
| 188 | if (kernelSizeX > 0 && kernelSizeY > 0) { |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 189 | boxBlurX(src, &temp, kernelSizeX, lowOffsetX, highOffsetX, srcBounds); |
| 190 | boxBlurY(temp, dst, kernelSizeY, lowOffsetY, highOffsetY, dstBounds); |
| 191 | boxBlurX(*dst, &temp, kernelSizeX, highOffsetX, lowOffsetX, dstBounds); |
| 192 | boxBlurY(temp, dst, kernelSizeY, highOffsetY, lowOffsetY, dstBounds); |
| 193 | boxBlurX(*dst, &temp, kernelSizeX3, highOffsetX, highOffsetX, dstBounds); |
| 194 | boxBlurY(temp, dst, kernelSizeY3, highOffsetY, highOffsetY, dstBounds); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 195 | } else if (kernelSizeX > 0) { |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 196 | boxBlurX(src, dst, kernelSizeX, lowOffsetX, highOffsetX, srcBounds); |
| 197 | boxBlurX(*dst, &temp, kernelSizeX, highOffsetX, lowOffsetX, dstBounds); |
| 198 | boxBlurX(temp, dst, kernelSizeX3, highOffsetX, highOffsetX, dstBounds); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 199 | } else if (kernelSizeY > 0) { |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 200 | boxBlurY(src, dst, kernelSizeY, lowOffsetY, highOffsetY, srcBounds); |
| 201 | boxBlurY(*dst, &temp, kernelSizeY, highOffsetY, lowOffsetY, dstBounds); |
| 202 | boxBlurY(temp, dst, kernelSizeY3, highOffsetY, highOffsetY, dstBounds); |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 203 | } |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 204 | offset->fX += srcBounds.fLeft; |
| 205 | offset->fY += srcBounds.fTop; |
senorblanco@chromium.org | ae814c7 | 2011-12-20 20:02:19 +0000 | [diff] [blame] | 206 | return true; |
| 207 | } |
| 208 | |
commit-bot@chromium.org | 1aa54bf | 2013-08-05 16:53:50 +0000 | [diff] [blame] | 209 | bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm, |
| 210 | SkBitmap* result, SkIPoint* offset) { |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 211 | #if SK_SUPPORT_GPU |
senorblanco@chromium.org | c2594f4 | 2013-01-30 19:08:47 +0000 | [diff] [blame] | 212 | SkBitmap input; |
commit-bot@chromium.org | 1aa54bf | 2013-08-05 16:53:50 +0000 | [diff] [blame] | 213 | if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &input, offset)) { |
senorblanco@chromium.org | c2594f4 | 2013-01-30 19:08:47 +0000 | [diff] [blame] | 214 | return false; |
| 215 | } |
commit-bot@chromium.org | b8d00db | 2013-06-26 19:18:23 +0000 | [diff] [blame] | 216 | GrTexture* source = input.getTexture(); |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 217 | SkIRect rect; |
senorblanco@chromium.org | c2594f4 | 2013-01-30 19:08:47 +0000 | [diff] [blame] | 218 | src.getBounds(&rect); |
senorblanco@chromium.org | fbaea53 | 2013-08-27 21:37:01 +0000 | [diff] [blame] | 219 | if (!this->applyCropRect(&rect, ctm)) { |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 220 | return false; |
| 221 | } |
skia.committer@gmail.com | 6ae6383 | 2013-07-23 07:01:05 +0000 | [diff] [blame] | 222 | SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(), |
senorblanco@chromium.org | 194d775 | 2013-07-24 22:19:24 +0000 | [diff] [blame] | 223 | source, |
| 224 | false, |
| 225 | SkRect::Make(rect), |
| 226 | true, |
| 227 | fSigma.width(), |
| 228 | fSigma.height())); |
| 229 | offset->fX += rect.fLeft; |
| 230 | offset->fY += rect.fTop; |
| 231 | return SkImageFilterUtils::WrapTexture(tex, rect.width(), rect.height(), result); |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 232 | #else |
| 233 | SkDEBUGFAIL("Should not call in GPU-less build"); |
senorblanco@chromium.org | c2594f4 | 2013-01-30 19:08:47 +0000 | [diff] [blame] | 234 | return false; |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 235 | #endif |
senorblanco@chromium.org | 302cffb | 2012-08-01 20:16:34 +0000 | [diff] [blame] | 236 | } |