reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 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 "SkBitmapCache.h" |
reed | 011f39a | 2014-08-28 13:35:23 -0700 | [diff] [blame] | 9 | #include "SkResourceCache.h" |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 10 | #include "SkMipMap.h" |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 11 | #include "SkRect.h" |
| 12 | |
reed | 14b6aba | 2014-08-29 10:25:26 -0700 | [diff] [blame] | 13 | SkBitmap::Allocator* SkBitmapCache::GetAllocator() { |
| 14 | return SkResourceCache::GetAllocator(); |
| 15 | } |
| 16 | |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 17 | /** |
| 18 | This function finds the bounds of the bitmap *within its pixelRef*. |
| 19 | If the bitmap lacks a pixelRef, it will return an empty rect, since |
| 20 | that doesn't make sense. This may be a useful enough function that |
| 21 | it should be somewhere else (in SkBitmap?). |
| 22 | */ |
| 23 | static SkIRect get_bounds_from_bitmap(const SkBitmap& bm) { |
| 24 | if (!(bm.pixelRef())) { |
| 25 | return SkIRect::MakeEmpty(); |
| 26 | } |
| 27 | SkIPoint origin = bm.pixelRefOrigin(); |
| 28 | return SkIRect::MakeXYWH(origin.fX, origin.fY, bm.width(), bm.height()); |
| 29 | } |
| 30 | |
reed | 011f39a | 2014-08-28 13:35:23 -0700 | [diff] [blame] | 31 | struct BitmapKey : public SkResourceCache::Key { |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 32 | public: |
| 33 | BitmapKey(uint32_t genID, SkScalar scaleX, SkScalar scaleY, const SkIRect& bounds) |
| 34 | : fGenID(genID) |
| 35 | , fScaleX(scaleX) |
| 36 | , fScaleY(scaleY) |
| 37 | , fBounds(bounds) |
| 38 | { |
| 39 | this->init(sizeof(fGenID) + sizeof(fScaleX) + sizeof(fScaleY) + sizeof(fBounds)); |
| 40 | } |
qiankun.miao | 045bb7f | 2014-08-25 06:08:25 -0700 | [diff] [blame] | 41 | |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 42 | uint32_t fGenID; |
| 43 | SkScalar fScaleX; |
| 44 | SkScalar fScaleY; |
| 45 | SkIRect fBounds; |
| 46 | }; |
| 47 | |
| 48 | ////////////////////////////////////////////////////////////////////////////////////////// |
| 49 | |
reed | 011f39a | 2014-08-28 13:35:23 -0700 | [diff] [blame] | 50 | struct BitmapRec : public SkResourceCache::Rec { |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 51 | BitmapRec(uint32_t genID, SkScalar scaleX, SkScalar scaleY, const SkIRect& bounds, |
| 52 | const SkBitmap& result) |
| 53 | : fKey(genID, scaleX, scaleY, bounds) |
| 54 | , fBitmap(result) |
| 55 | {} |
| 56 | |
| 57 | BitmapKey fKey; |
| 58 | SkBitmap fBitmap; |
piotaixr | 42b0dfe | 2014-09-03 11:33:13 -0700 | [diff] [blame] | 59 | |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 60 | virtual const Key& getKey() const SK_OVERRIDE { return fKey; } |
| 61 | virtual size_t bytesUsed() const SK_OVERRIDE { return sizeof(fKey) + fBitmap.getSize(); } |
reed | dee6a8e | 2014-09-15 06:44:47 -0700 | [diff] [blame] | 62 | }; |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 63 | |
reed | 595aa05 | 2014-09-15 10:15:18 -0700 | [diff] [blame^] | 64 | static bool find_and_return(const BitmapKey& key, SkBitmap* result) { |
| 65 | const BitmapRec* rec = (BitmapRec*)SkResourceCache::FindAndLock(key); |
| 66 | if (rec) { |
| 67 | *result = rec->fBitmap; |
| 68 | SkResourceCache::Unlock(rec); |
| 69 | |
| 70 | result->lockPixels(); |
| 71 | if (result->getPixels()) { |
| 72 | return true; |
| 73 | } |
| 74 | |
| 75 | SkResourceCache::Remove(rec); |
| 76 | result->reset(); |
| 77 | // fall-through to false |
| 78 | } |
| 79 | return false; |
| 80 | } |
| 81 | |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 82 | bool SkBitmapCache::Find(const SkBitmap& src, SkScalar invScaleX, SkScalar invScaleY, |
| 83 | SkBitmap* result) { |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 84 | if (0 == invScaleX || 0 == invScaleY) { |
| 85 | // degenerate, and the key we use for mipmaps |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 86 | return false; |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 87 | } |
| 88 | BitmapKey key(src.getGenerationID(), invScaleX, invScaleY, get_bounds_from_bitmap(src)); |
reed | 595aa05 | 2014-09-15 10:15:18 -0700 | [diff] [blame^] | 89 | return find_and_return(key, result); |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 90 | } |
| 91 | |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 92 | void SkBitmapCache::Add(const SkBitmap& src, SkScalar invScaleX, SkScalar invScaleY, |
| 93 | const SkBitmap& result) { |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 94 | if (0 == invScaleX || 0 == invScaleY) { |
| 95 | // degenerate, and the key we use for mipmaps |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 96 | return; |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 97 | } |
reed | 14b6aba | 2014-08-29 10:25:26 -0700 | [diff] [blame] | 98 | SkASSERT(result.isImmutable()); |
reed | 011f39a | 2014-08-28 13:35:23 -0700 | [diff] [blame] | 99 | SkResourceCache::Add(SkNEW_ARGS(BitmapRec, (src.getGenerationID(), invScaleX, invScaleY, |
| 100 | get_bounds_from_bitmap(src), result))); |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 101 | } |
| 102 | |
piotaixr | 42b0dfe | 2014-09-03 11:33:13 -0700 | [diff] [blame] | 103 | bool SkBitmapCache::Find(uint32_t genID, const SkIRect& subset, SkBitmap* result) { |
| 104 | BitmapKey key(genID, SK_Scalar1, SK_Scalar1, subset); |
reed | 595aa05 | 2014-09-15 10:15:18 -0700 | [diff] [blame^] | 105 | return find_and_return(key, result); |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 106 | } |
| 107 | |
piotaixr | 42b0dfe | 2014-09-03 11:33:13 -0700 | [diff] [blame] | 108 | bool SkBitmapCache::Add(uint32_t genID, const SkIRect& subset, const SkBitmap& result) { |
reed | 14b6aba | 2014-08-29 10:25:26 -0700 | [diff] [blame] | 109 | SkASSERT(result.isImmutable()); |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 110 | |
piotaixr | 42b0dfe | 2014-09-03 11:33:13 -0700 | [diff] [blame] | 111 | if (subset.isEmpty() |
| 112 | || subset.top() < 0 |
| 113 | || subset.left() < 0 |
| 114 | || result.width() != subset.width() |
| 115 | || result.height() != subset.height()) { |
| 116 | return false; |
| 117 | } else { |
| 118 | SkResourceCache::Add(SkNEW_ARGS(BitmapRec, (genID, SK_Scalar1, SK_Scalar1, |
| 119 | subset, result))); |
| 120 | |
| 121 | return true; |
| 122 | } |
| 123 | } |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 124 | ////////////////////////////////////////////////////////////////////////////////////////// |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 125 | |
reed | 011f39a | 2014-08-28 13:35:23 -0700 | [diff] [blame] | 126 | struct MipMapRec : public SkResourceCache::Rec { |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 127 | MipMapRec(const SkBitmap& src, const SkMipMap* result) |
| 128 | : fKey(src.getGenerationID(), 0, 0, get_bounds_from_bitmap(src)) |
| 129 | , fMipMap(SkRef(result)) |
| 130 | {} |
| 131 | |
| 132 | virtual ~MipMapRec() { |
| 133 | fMipMap->unref(); |
| 134 | } |
| 135 | |
| 136 | BitmapKey fKey; |
| 137 | const SkMipMap* fMipMap; |
piotaixr | 42b0dfe | 2014-09-03 11:33:13 -0700 | [diff] [blame] | 138 | |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 139 | virtual const Key& getKey() const SK_OVERRIDE { return fKey; } |
| 140 | virtual size_t bytesUsed() const SK_OVERRIDE { return sizeof(fKey) + fMipMap->getSize(); } |
reed | dee6a8e | 2014-09-15 06:44:47 -0700 | [diff] [blame] | 141 | }; |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 142 | |
reed | 595aa05 | 2014-09-15 10:15:18 -0700 | [diff] [blame^] | 143 | |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 144 | const SkMipMap* SkMipMapCache::FindAndRef(const SkBitmap& src) { |
| 145 | BitmapKey key(src.getGenerationID(), 0, 0, get_bounds_from_bitmap(src)); |
reed | 595aa05 | 2014-09-15 10:15:18 -0700 | [diff] [blame^] | 146 | const MipMapRec* rec = (MipMapRec*)SkResourceCache::FindAndLock(key); |
| 147 | const SkMipMap* result = NULL; |
| 148 | if (rec) { |
| 149 | result = SkRef(rec->fMipMap); |
| 150 | SkResourceCache::Unlock(rec); |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 151 | } |
| 152 | return result; |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 153 | } |
| 154 | |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 155 | void SkMipMapCache::Add(const SkBitmap& src, const SkMipMap* result) { |
| 156 | if (result) { |
reed | 011f39a | 2014-08-28 13:35:23 -0700 | [diff] [blame] | 157 | SkResourceCache::Add(SkNEW_ARGS(MipMapRec, (src, result))); |
reed | 680fb9e | 2014-08-26 09:08:04 -0700 | [diff] [blame] | 158 | } |
reed | 0461713 | 2014-08-21 09:46:49 -0700 | [diff] [blame] | 159 | } |
| 160 | |