reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 Google Inc. |
| 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 | |
| 8 | #include "SkSurface_Base.h" |
| 9 | #include "SkImagePriv.h" |
| 10 | #include "SkCanvas.h" |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 11 | #include "SkDevice.h" |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 12 | #include "SkMallocPixelRef.h" |
| 13 | |
| 14 | static const size_t kIgnoreRowBytesValue = (size_t)~0; |
| 15 | |
| 16 | class SkSurface_Raster : public SkSurface_Base { |
| 17 | public: |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame] | 18 | static bool Valid(const SkImageInfo&, size_t rb = kIgnoreRowBytesValue); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 19 | |
reed | 982542d | 2014-06-27 06:48:14 -0700 | [diff] [blame] | 20 | SkSurface_Raster(const SkImageInfo&, void*, size_t rb, |
reed | 4a8126e | 2014-09-22 07:29:03 -0700 | [diff] [blame] | 21 | void (*releaseProc)(void* pixels, void* context), void* context, |
| 22 | const SkSurfaceProps*); |
| 23 | SkSurface_Raster(SkPixelRef*, const SkSurfaceProps*); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 24 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 25 | SkCanvas* onNewCanvas() override; |
| 26 | SkSurface* onNewSurface(const SkImageInfo&) override; |
| 27 | SkImage* onNewImageSnapshot(Budgeted) override; |
tfarina | 7831a4b | 2015-04-27 07:53:07 -0700 | [diff] [blame] | 28 | void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*) override; |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 29 | void onCopyOnWrite(ContentChangeMode) override; |
reed | 26e0e58 | 2015-07-29 11:44:52 -0700 | [diff] [blame] | 30 | void onRestoreBackingMutability() override; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 31 | |
| 32 | private: |
| 33 | SkBitmap fBitmap; |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 34 | size_t fRowBytes; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 35 | bool fWeOwnThePixels; |
| 36 | |
| 37 | typedef SkSurface_Base INHERITED; |
| 38 | }; |
| 39 | |
| 40 | /////////////////////////////////////////////////////////////////////////////// |
| 41 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame] | 42 | bool SkSurface_Raster::Valid(const SkImageInfo& info, size_t rowBytes) { |
reed | b2497c2 | 2014-12-31 12:31:43 -0800 | [diff] [blame] | 43 | if (info.isEmpty()) { |
| 44 | return false; |
| 45 | } |
| 46 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 47 | static const size_t kMaxTotalSize = SK_MaxS32; |
| 48 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 49 | int shift = 0; |
reed | e5ea500 | 2014-09-03 11:54:58 -0700 | [diff] [blame] | 50 | switch (info.colorType()) { |
reed@google.com | 1360c52 | 2014-01-08 21:25:26 +0000 | [diff] [blame] | 51 | case kAlpha_8_SkColorType: |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 52 | shift = 0; |
| 53 | break; |
reed@google.com | 1360c52 | 2014-01-08 21:25:26 +0000 | [diff] [blame] | 54 | case kRGB_565_SkColorType: |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 55 | shift = 1; |
| 56 | break; |
commit-bot@chromium.org | 28fcae2 | 2014-04-11 17:15:40 +0000 | [diff] [blame] | 57 | case kN32_SkColorType: |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 58 | shift = 2; |
| 59 | break; |
| 60 | default: |
| 61 | return false; |
| 62 | } |
| 63 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 64 | if (kIgnoreRowBytesValue == rowBytes) { |
| 65 | return true; |
| 66 | } |
| 67 | |
reed | e5ea500 | 2014-09-03 11:54:58 -0700 | [diff] [blame] | 68 | uint64_t minRB = (uint64_t)info.width() << shift; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 69 | if (minRB > rowBytes) { |
| 70 | return false; |
| 71 | } |
| 72 | |
| 73 | size_t alignedRowBytes = rowBytes >> shift << shift; |
| 74 | if (alignedRowBytes != rowBytes) { |
| 75 | return false; |
| 76 | } |
| 77 | |
reed | e5ea500 | 2014-09-03 11:54:58 -0700 | [diff] [blame] | 78 | uint64_t size = sk_64_mul(info.height(), rowBytes); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 79 | if (size > kMaxTotalSize) { |
| 80 | return false; |
| 81 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 82 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 83 | return true; |
| 84 | } |
| 85 | |
reed | 982542d | 2014-06-27 06:48:14 -0700 | [diff] [blame] | 86 | SkSurface_Raster::SkSurface_Raster(const SkImageInfo& info, void* pixels, size_t rb, |
reed | 4a8126e | 2014-09-22 07:29:03 -0700 | [diff] [blame] | 87 | void (*releaseProc)(void* pixels, void* context), void* context, |
| 88 | const SkSurfaceProps* props) |
| 89 | : INHERITED(info, props) |
reed@google.com | 1360c52 | 2014-01-08 21:25:26 +0000 | [diff] [blame] | 90 | { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 91 | fBitmap.installPixels(info, pixels, rb, nullptr, releaseProc, context); |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 92 | fRowBytes = 0; // don't need to track the rowbytes |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 93 | fWeOwnThePixels = false; // We are "Direct" |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 94 | } |
| 95 | |
reed | 4a8126e | 2014-09-22 07:29:03 -0700 | [diff] [blame] | 96 | SkSurface_Raster::SkSurface_Raster(SkPixelRef* pr, const SkSurfaceProps* props) |
| 97 | : INHERITED(pr->info().width(), pr->info().height(), props) |
reed@google.com | 1360c52 | 2014-01-08 21:25:26 +0000 | [diff] [blame] | 98 | { |
commit-bot@chromium.org | e13af71 | 2014-01-13 20:39:14 +0000 | [diff] [blame] | 99 | const SkImageInfo& info = pr->info(); |
| 100 | |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 101 | fBitmap.setInfo(info, pr->rowBytes()); |
commit-bot@chromium.org | e13af71 | 2014-01-13 20:39:14 +0000 | [diff] [blame] | 102 | fBitmap.setPixelRef(pr); |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 103 | fRowBytes = pr->rowBytes(); // we track this, so that subsequent re-allocs will match |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 104 | fWeOwnThePixels = true; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 105 | } |
| 106 | |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 107 | SkCanvas* SkSurface_Raster::onNewCanvas() { return new SkCanvas(fBitmap, this->props()); } |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 108 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame] | 109 | SkSurface* SkSurface_Raster::onNewSurface(const SkImageInfo& info) { |
robertphillips | 702edbd | 2015-06-23 06:26:08 -0700 | [diff] [blame] | 110 | return SkSurface::NewRaster(info, &this->props()); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 111 | } |
| 112 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 113 | void SkSurface_Raster::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, |
| 114 | const SkPaint* paint) { |
| 115 | canvas->drawBitmap(fBitmap, x, y, paint); |
| 116 | } |
| 117 | |
bsalomon | eaaaf0b | 2015-01-23 08:08:04 -0800 | [diff] [blame] | 118 | SkImage* SkSurface_Raster::onNewImageSnapshot(Budgeted) { |
reed | 26e0e58 | 2015-07-29 11:44:52 -0700 | [diff] [blame] | 119 | if (fWeOwnThePixels) { |
| 120 | // SkImage_raster requires these pixels are immutable for its full lifetime. |
| 121 | // We'll undo this via onRestoreBackingMutability() if we can avoid the COW. |
| 122 | if (SkPixelRef* pr = fBitmap.pixelRef()) { |
| 123 | pr->setTemporarilyImmutable(); |
| 124 | } |
| 125 | } |
fmalita | 9a5d1ab | 2015-07-27 10:27:28 -0700 | [diff] [blame] | 126 | // Our pixels are in memory, so read access on the snapshot SkImage could be cheap. |
| 127 | // Lock the shared pixel ref to ensure peekPixels() is usable. |
reed | af3fbfc | 2015-10-04 11:28:36 -0700 | [diff] [blame] | 128 | return SkNewImageFromRasterBitmap(fBitmap, |
reed | 26e0e58 | 2015-07-29 11:44:52 -0700 | [diff] [blame] | 129 | fWeOwnThePixels ? kNo_ForceCopyMode : kYes_ForceCopyMode); |
| 130 | } |
| 131 | |
| 132 | void SkSurface_Raster::onRestoreBackingMutability() { |
| 133 | SkASSERT(!this->hasCachedImage()); // Shouldn't be any snapshots out there. |
| 134 | if (SkPixelRef* pr = fBitmap.pixelRef()) { |
| 135 | pr->restoreMutability(); |
| 136 | } |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 137 | } |
| 138 | |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 139 | void SkSurface_Raster::onCopyOnWrite(ContentChangeMode mode) { |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 140 | // are we sharing pixelrefs with the image? |
bsalomon | eaaaf0b | 2015-01-23 08:08:04 -0800 | [diff] [blame] | 141 | SkASSERT(this->getCachedImage(kNo_Budgeted)); |
| 142 | if (SkBitmapImageGetPixelRef(this->getCachedImage(kNo_Budgeted)) == fBitmap.pixelRef()) { |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 143 | SkASSERT(fWeOwnThePixels); |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 144 | if (kDiscard_ContentChangeMode == mode) { |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 145 | fBitmap.allocPixels(); |
| 146 | } else { |
| 147 | SkBitmap prev(fBitmap); |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 148 | fBitmap.allocPixels(); |
| 149 | prev.lockPixels(); |
| 150 | SkASSERT(prev.info() == fBitmap.info()); |
| 151 | SkASSERT(prev.rowBytes() == fBitmap.rowBytes()); |
| 152 | memcpy(fBitmap.getPixels(), prev.getPixels(), fBitmap.getSafeSize()); |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 153 | } |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 154 | SkASSERT(fBitmap.rowBytes() == fRowBytes); // be sure we always use the same value |
| 155 | |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 156 | // Now fBitmap is a deep copy of itself (and therefore different from |
| 157 | // what is being used by the image. Next we update the canvas to use |
| 158 | // this as its backend, so we can't modify the image's pixels anymore. |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 159 | SkASSERT(this->getCachedCanvas()); |
junov@chromium.org | acea3ef | 2013-04-16 19:41:09 +0000 | [diff] [blame] | 160 | this->getCachedCanvas()->getDevice()->replaceBitmapBackendForRasterSurface(fBitmap); |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 161 | } |
| 162 | } |
| 163 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 164 | /////////////////////////////////////////////////////////////////////////////// |
| 165 | |
reed | 982542d | 2014-06-27 06:48:14 -0700 | [diff] [blame] | 166 | SkSurface* SkSurface::NewRasterDirectReleaseProc(const SkImageInfo& info, void* pixels, size_t rb, |
| 167 | void (*releaseProc)(void* pixels, void* context), |
reed | 4a8126e | 2014-09-22 07:29:03 -0700 | [diff] [blame] | 168 | void* context, const SkSurfaceProps* props) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 169 | if (nullptr == releaseProc) { |
| 170 | context = nullptr; |
reed | 982542d | 2014-06-27 06:48:14 -0700 | [diff] [blame] | 171 | } |
| 172 | if (!SkSurface_Raster::Valid(info, rb)) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 173 | return nullptr; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 174 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 175 | if (nullptr == pixels) { |
| 176 | return nullptr; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 177 | } |
reed | 26e0e58 | 2015-07-29 11:44:52 -0700 | [diff] [blame] | 178 | |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 179 | return new SkSurface_Raster(info, pixels, rb, releaseProc, context, props); |
reed | 982542d | 2014-06-27 06:48:14 -0700 | [diff] [blame] | 180 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 181 | |
reed | 4a8126e | 2014-09-22 07:29:03 -0700 | [diff] [blame] | 182 | SkSurface* SkSurface::NewRasterDirect(const SkImageInfo& info, void* pixels, size_t rowBytes, |
| 183 | const SkSurfaceProps* props) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 184 | return NewRasterDirectReleaseProc(info, pixels, rowBytes, nullptr, nullptr, props); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 185 | } |
| 186 | |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 187 | SkSurface* SkSurface::NewRaster(const SkImageInfo& info, size_t rowBytes, |
| 188 | const SkSurfaceProps* props) { |
mike@reedtribe.org | b947625 | 2012-11-15 02:37:45 +0000 | [diff] [blame] | 189 | if (!SkSurface_Raster::Valid(info)) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 190 | return nullptr; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 191 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 192 | |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 193 | SkAutoTUnref<SkPixelRef> pr(SkMallocPixelRef::NewZeroed(info, rowBytes, nullptr)); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 194 | if (nullptr == pr.get()) { |
| 195 | return nullptr; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 196 | } |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 197 | if (rowBytes) { |
| 198 | SkASSERT(pr->rowBytes() == rowBytes); |
| 199 | } |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 200 | return new SkSurface_Raster(pr, props); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 201 | } |
reed | 9cd016e | 2016-01-30 10:01:06 -0800 | [diff] [blame] | 202 | |
| 203 | SkSurface* SkSurface::NewRaster(const SkImageInfo& info, const SkSurfaceProps* props) { |
| 204 | return NewRaster(info, 0, props); |
| 205 | } |