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@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 20 | SkSurface_Raster(const SkImageInfo&, void*, size_t rb); |
| 21 | SkSurface_Raster(const SkImageInfo&, SkPixelRef*, size_t rb); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 22 | |
| 23 | virtual SkCanvas* onNewCanvas() SK_OVERRIDE; |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 24 | virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE; |
junov@chromium.org | 5ee449a | 2013-04-12 20:20:50 +0000 | [diff] [blame] | 25 | virtual SkImage* onNewImageSnapshot() SK_OVERRIDE; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 26 | virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, |
| 27 | const SkPaint*) SK_OVERRIDE; |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 28 | virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE; |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 29 | |
| 30 | private: |
| 31 | SkBitmap fBitmap; |
| 32 | bool fWeOwnThePixels; |
| 33 | |
| 34 | typedef SkSurface_Base INHERITED; |
| 35 | }; |
| 36 | |
| 37 | /////////////////////////////////////////////////////////////////////////////// |
| 38 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 39 | bool SkSurface_Raster::Valid(const SkImageInfo& info, size_t rowBytes) { |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 40 | static const size_t kMaxTotalSize = SK_MaxS32; |
| 41 | |
reed@google.com | 383a697 | 2013-10-21 14:00:07 +0000 | [diff] [blame] | 42 | SkBitmap::Config config = SkImageInfoToBitmapConfig(info); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 43 | |
| 44 | int shift = 0; |
| 45 | switch (config) { |
| 46 | case SkBitmap::kA8_Config: |
| 47 | shift = 0; |
| 48 | break; |
| 49 | case SkBitmap::kRGB_565_Config: |
| 50 | shift = 1; |
| 51 | break; |
| 52 | case SkBitmap::kARGB_8888_Config: |
| 53 | shift = 2; |
| 54 | break; |
| 55 | default: |
| 56 | return false; |
| 57 | } |
| 58 | |
| 59 | // TODO: examine colorspace |
| 60 | |
| 61 | if (kIgnoreRowBytesValue == rowBytes) { |
| 62 | return true; |
| 63 | } |
| 64 | |
| 65 | uint64_t minRB = (uint64_t)info.fWidth << shift; |
| 66 | if (minRB > rowBytes) { |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | size_t alignedRowBytes = rowBytes >> shift << shift; |
| 71 | if (alignedRowBytes != rowBytes) { |
| 72 | return false; |
| 73 | } |
| 74 | |
| 75 | uint64_t size = (uint64_t)info.fHeight * rowBytes; |
| 76 | if (size > kMaxTotalSize) { |
| 77 | return false; |
| 78 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 79 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 80 | return true; |
| 81 | } |
| 82 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 83 | SkSurface_Raster::SkSurface_Raster(const SkImageInfo& info, void* pixels, size_t rb) |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 84 | : INHERITED(info.fWidth, info.fHeight) { |
reed@google.com | 383a697 | 2013-10-21 14:00:07 +0000 | [diff] [blame] | 85 | SkBitmap::Config config = SkImageInfoToBitmapConfig(info); |
| 86 | fBitmap.setConfig(config, info.fWidth, info.fHeight, rb, info.fAlphaType); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 87 | fBitmap.setPixels(pixels); |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 88 | fWeOwnThePixels = false; // We are "Direct" |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 89 | } |
| 90 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 91 | SkSurface_Raster::SkSurface_Raster(const SkImageInfo& info, SkPixelRef* pr, size_t rb) |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 92 | : INHERITED(info.fWidth, info.fHeight) { |
reed@google.com | 383a697 | 2013-10-21 14:00:07 +0000 | [diff] [blame] | 93 | SkBitmap::Config config = SkImageInfoToBitmapConfig(info); |
| 94 | fBitmap.setConfig(config, info.fWidth, info.fHeight, rb, info.fAlphaType); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 95 | fBitmap.setPixelRef(pr); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 96 | fWeOwnThePixels = true; |
| 97 | |
reed@google.com | 383a697 | 2013-10-21 14:00:07 +0000 | [diff] [blame] | 98 | if (!SkAlphaTypeIsOpaque(info.fAlphaType)) { |
junov@google.com | dbfac8a | 2012-12-06 21:47:40 +0000 | [diff] [blame] | 99 | fBitmap.eraseColor(SK_ColorTRANSPARENT); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 100 | } |
| 101 | } |
| 102 | |
| 103 | SkCanvas* SkSurface_Raster::onNewCanvas() { |
| 104 | return SkNEW_ARGS(SkCanvas, (fBitmap)); |
| 105 | } |
| 106 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 107 | SkSurface* SkSurface_Raster::onNewSurface(const SkImageInfo& info) { |
mike@reedtribe.org | b947625 | 2012-11-15 02:37:45 +0000 | [diff] [blame] | 108 | return SkSurface::NewRaster(info); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 109 | } |
| 110 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 111 | void SkSurface_Raster::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, |
| 112 | const SkPaint* paint) { |
| 113 | canvas->drawBitmap(fBitmap, x, y, paint); |
| 114 | } |
| 115 | |
junov@chromium.org | 5ee449a | 2013-04-12 20:20:50 +0000 | [diff] [blame] | 116 | SkImage* SkSurface_Raster::onNewImageSnapshot() { |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 117 | return SkNewImageFromBitmap(fBitmap, fWeOwnThePixels); |
| 118 | } |
| 119 | |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 120 | void SkSurface_Raster::onCopyOnWrite(ContentChangeMode mode) { |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 121 | // are we sharing pixelrefs with the image? |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 122 | SkASSERT(NULL != this->getCachedImage()); |
junov@chromium.org | acea3ef | 2013-04-16 19:41:09 +0000 | [diff] [blame] | 123 | if (SkBitmapImageGetPixelRef(this->getCachedImage()) == fBitmap.pixelRef()) { |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 124 | SkASSERT(fWeOwnThePixels); |
commit-bot@chromium.org | c4c9870 | 2013-04-22 14:28:01 +0000 | [diff] [blame] | 125 | if (kDiscard_ContentChangeMode == mode) { |
| 126 | fBitmap.setPixelRef(NULL, 0); |
| 127 | fBitmap.allocPixels(); |
| 128 | } else { |
| 129 | SkBitmap prev(fBitmap); |
| 130 | prev.deepCopyTo(&fBitmap, prev.config()); |
| 131 | } |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 132 | // Now fBitmap is a deep copy of itself (and therefore different from |
| 133 | // what is being used by the image. Next we update the canvas to use |
| 134 | // this as its backend, so we can't modify the image's pixels anymore. |
junov@chromium.org | acea3ef | 2013-04-16 19:41:09 +0000 | [diff] [blame] | 135 | SkASSERT(NULL != this->getCachedCanvas()); |
| 136 | this->getCachedCanvas()->getDevice()->replaceBitmapBackendForRasterSurface(fBitmap); |
reed@google.com | 97af1a6 | 2012-08-28 12:19:02 +0000 | [diff] [blame] | 137 | } |
| 138 | } |
| 139 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 140 | /////////////////////////////////////////////////////////////////////////////// |
| 141 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 142 | SkSurface* SkSurface::NewRasterDirect(const SkImageInfo& info, void* pixels, size_t rowBytes) { |
mike@reedtribe.org | b947625 | 2012-11-15 02:37:45 +0000 | [diff] [blame] | 143 | if (!SkSurface_Raster::Valid(info, rowBytes)) { |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 144 | return NULL; |
| 145 | } |
| 146 | if (NULL == pixels) { |
| 147 | return NULL; |
| 148 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 149 | |
mike@reedtribe.org | b947625 | 2012-11-15 02:37:45 +0000 | [diff] [blame] | 150 | return SkNEW_ARGS(SkSurface_Raster, (info, pixels, rowBytes)); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 151 | } |
| 152 | |
reed@google.com | 2bd8b81 | 2013-11-01 13:46:54 +0000 | [diff] [blame^] | 153 | SkSurface* SkSurface::NewRaster(const SkImageInfo& info) { |
mike@reedtribe.org | b947625 | 2012-11-15 02:37:45 +0000 | [diff] [blame] | 154 | if (!SkSurface_Raster::Valid(info)) { |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 155 | return NULL; |
| 156 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 157 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 158 | static const size_t kMaxTotalSize = SK_MaxS32; |
| 159 | size_t rowBytes = SkImageMinRowBytes(info); |
| 160 | uint64_t size64 = (uint64_t)info.fHeight * rowBytes; |
| 161 | if (size64 > kMaxTotalSize) { |
| 162 | return NULL; |
| 163 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 164 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 165 | size_t size = (size_t)size64; |
| 166 | void* pixels = sk_malloc_throw(size); |
| 167 | if (NULL == pixels) { |
| 168 | return NULL; |
| 169 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 170 | |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 171 | SkAutoTUnref<SkPixelRef> pr(SkNEW_ARGS(SkMallocPixelRef, (pixels, size, NULL, true))); |
mike@reedtribe.org | b947625 | 2012-11-15 02:37:45 +0000 | [diff] [blame] | 172 | return SkNEW_ARGS(SkSurface_Raster, (info, pr, rowBytes)); |
reed@google.com | c906204 | 2012-07-30 18:06:00 +0000 | [diff] [blame] | 173 | } |