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| 1 /* libs/graphics/sgl/SkColorTable.cpp | |
| 2 ** | |
| 3 ** Copyright 2006, The Android Open Source Project | |
| 4 ** | |
| 5 ** Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 ** you may not use this file except in compliance with the License. | |
| 7 ** You may obtain a copy of the License at | |
| 8 ** | |
| 9 ** http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 ** | |
| 11 ** Unless required by applicable law or agreed to in writing, software | |
| 12 ** distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 ** See the License for the specific language governing permissions and | |
| 15 ** limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 #include "SkBitmap.h" | |
| 19 #include "SkFlattenable.h" | |
| 20 #include "SkStream.h" | |
| 21 #include "SkTemplates.h" | |
| 22 | |
| 23 SkColorTable::SkColorTable(int count) | |
| 24 : f16BitCache(NULL), fFlags(0) | |
| 25 { | |
| 26 if (count < 0) | |
| 27 count = 0; | |
| 28 else if (count > 256) | |
| 29 count = 256; | |
| 30 | |
| 31 fCount = SkToU16(count); | |
| 32 fColors = (SkPMColor*)sk_malloc_throw(count * sizeof(SkPMColor)); | |
| 33 memset(fColors, 0, count * sizeof(SkPMColor)); | |
| 34 | |
| 35 SkDEBUGCODE(fColorLockCount = 0;) | |
| 36 SkDEBUGCODE(f16BitCacheLockCount = 0;) | |
| 37 } | |
| 38 | |
| 39 SkColorTable::SkColorTable(const SkPMColor colors[], int count) | |
| 40 : f16BitCache(NULL), fFlags(0) | |
| 41 { | |
| 42 if (count < 0) | |
| 43 count = 0; | |
| 44 else if (count > 256) | |
| 45 count = 256; | |
| 46 | |
| 47 fCount = SkToU16(count); | |
| 48 fColors = (SkPMColor*)sk_malloc_throw(count * sizeof(SkPMColor)); | |
| 49 | |
| 50 if (colors) | |
| 51 memcpy(fColors, colors, count * sizeof(SkPMColor)); | |
| 52 | |
| 53 SkDEBUGCODE(fColorLockCount = 0;) | |
| 54 SkDEBUGCODE(f16BitCacheLockCount = 0;) | |
| 55 } | |
| 56 | |
| 57 SkColorTable::~SkColorTable() | |
| 58 { | |
| 59 SkASSERT(fColorLockCount == 0); | |
| 60 SkASSERT(f16BitCacheLockCount == 0); | |
| 61 | |
| 62 sk_free(fColors); | |
| 63 sk_free(f16BitCache); | |
| 64 } | |
| 65 | |
| 66 void SkColorTable::setFlags(unsigned flags) | |
| 67 { | |
| 68 fFlags = SkToU8(flags); | |
| 69 } | |
| 70 | |
| 71 void SkColorTable::unlockColors(bool changed) | |
| 72 { | |
| 73 SkASSERT(fColorLockCount != 0); | |
| 74 SkDEBUGCODE(fColorLockCount -= 1;) | |
| 75 if (changed) | |
| 76 this->inval16BitCache(); | |
| 77 } | |
| 78 | |
| 79 void SkColorTable::inval16BitCache() | |
| 80 { | |
| 81 SkASSERT(f16BitCacheLockCount == 0); | |
| 82 if (f16BitCache) | |
| 83 { | |
| 84 sk_free(f16BitCache); | |
| 85 f16BitCache = NULL; | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 #include "SkColorPriv.h" | |
| 90 | |
| 91 static inline void build_16bitcache(uint16_t dst[], const SkPMColor src[], int c
ount) | |
| 92 { | |
| 93 while (--count >= 0) | |
| 94 *dst++ = SkPixel32ToPixel16_ToU16(*src++); | |
| 95 } | |
| 96 | |
| 97 const uint16_t* SkColorTable::lock16BitCache() | |
| 98 { | |
| 99 if (fFlags & kColorsAreOpaque_Flag) | |
| 100 { | |
| 101 if (f16BitCache == NULL) // build the cache | |
| 102 { | |
| 103 f16BitCache = (uint16_t*)sk_malloc_throw(fCount * sizeof(uint16_t)); | |
| 104 build_16bitcache(f16BitCache, fColors, fCount); | |
| 105 } | |
| 106 } | |
| 107 else // our colors have alpha, so no cache | |
| 108 { | |
| 109 this->inval16BitCache(); | |
| 110 if (f16BitCache) | |
| 111 { | |
| 112 sk_free(f16BitCache); | |
| 113 f16BitCache = NULL; | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 SkDEBUGCODE(f16BitCacheLockCount += 1); | |
| 118 return f16BitCache; | |
| 119 } | |
| 120 | |
| 121 /////////////////////////////////////////////////////////////////////////////// | |
| 122 | |
| 123 SkColorTable::SkColorTable(SkFlattenableReadBuffer& buffer) { | |
| 124 f16BitCache = NULL; | |
| 125 SkDEBUGCODE(fColorLockCount = 0;) | |
| 126 SkDEBUGCODE(f16BitCacheLockCount = 0;) | |
| 127 | |
| 128 fCount = buffer.readU16(); | |
| 129 SkASSERT((unsigned)fCount <= 256); | |
| 130 | |
| 131 fFlags = buffer.readU8(); | |
| 132 | |
| 133 fColors = (SkPMColor*)sk_malloc_throw(fCount * sizeof(SkPMColor)); | |
| 134 buffer.read(fColors, fCount * sizeof(SkPMColor)); | |
| 135 } | |
| 136 | |
| 137 void SkColorTable::flatten(SkFlattenableWriteBuffer& buffer) const { | |
| 138 int count = this->count(); | |
| 139 buffer.write16(count); | |
| 140 buffer.write8(this->getFlags()); | |
| 141 buffer.writeMul4(fColors, count * sizeof(SkPMColor)); | |
| 142 } | |
| 143 | |
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Chromium Code Reviews
Issue 113827:
Remove the remainder of the skia source code from the Chromium repo.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/