reed@android.com | a6260ff | 2009-05-04 18:52:54 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2006-2009 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 16 | |
| 17 | #include "SkBitmap.h" |
| 18 | #include "SkFlattenable.h" |
| 19 | #include "SkStream.h" |
| 20 | #include "SkTemplates.h" |
| 21 | |
| 22 | SkColorTable::SkColorTable(int count) |
| 23 | : f16BitCache(NULL), fFlags(0) |
| 24 | { |
| 25 | if (count < 0) |
| 26 | count = 0; |
| 27 | else if (count > 256) |
| 28 | count = 256; |
| 29 | |
| 30 | fCount = SkToU16(count); |
| 31 | fColors = (SkPMColor*)sk_malloc_throw(count * sizeof(SkPMColor)); |
| 32 | memset(fColors, 0, count * sizeof(SkPMColor)); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 33 | |
| 34 | SkDEBUGCODE(fColorLockCount = 0;) |
| 35 | SkDEBUGCODE(f16BitCacheLockCount = 0;) |
| 36 | } |
| 37 | |
| 38 | SkColorTable::SkColorTable(const SkColorTable& src) { |
| 39 | f16BitCache = NULL; |
| 40 | fFlags = src.fFlags; |
| 41 | int count = src.count(); |
| 42 | fCount = SkToU16(count); |
reed@android.com | a6260ff | 2009-05-04 18:52:54 +0000 | [diff] [blame^] | 43 | fColors = reinterpret_cast<SkPMColor*>( |
| 44 | sk_malloc_throw(count * sizeof(SkPMColor))); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 45 | memcpy(fColors, src.fColors, count * sizeof(SkPMColor)); |
| 46 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 47 | SkDEBUGCODE(fColorLockCount = 0;) |
| 48 | SkDEBUGCODE(f16BitCacheLockCount = 0;) |
| 49 | } |
| 50 | |
| 51 | SkColorTable::SkColorTable(const SkPMColor colors[], int count) |
| 52 | : f16BitCache(NULL), fFlags(0) |
| 53 | { |
| 54 | if (count < 0) |
| 55 | count = 0; |
| 56 | else if (count > 256) |
| 57 | count = 256; |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 58 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 59 | fCount = SkToU16(count); |
reed@android.com | a6260ff | 2009-05-04 18:52:54 +0000 | [diff] [blame^] | 60 | fColors = reinterpret_cast<SkPMColor*>( |
| 61 | sk_malloc_throw(count * sizeof(SkPMColor))); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 62 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 63 | if (colors) |
| 64 | memcpy(fColors, colors, count * sizeof(SkPMColor)); |
weita@google.com | f9ab99a | 2009-05-03 18:23:30 +0000 | [diff] [blame] | 65 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 66 | SkDEBUGCODE(fColorLockCount = 0;) |
| 67 | SkDEBUGCODE(f16BitCacheLockCount = 0;) |
| 68 | } |
| 69 | |
| 70 | SkColorTable::~SkColorTable() |
| 71 | { |
| 72 | SkASSERT(fColorLockCount == 0); |
| 73 | SkASSERT(f16BitCacheLockCount == 0); |
| 74 | |
| 75 | sk_free(fColors); |
| 76 | sk_free(f16BitCache); |
| 77 | } |
| 78 | |
| 79 | void SkColorTable::setFlags(unsigned flags) |
| 80 | { |
| 81 | fFlags = SkToU8(flags); |
| 82 | } |
| 83 | |
| 84 | void SkColorTable::unlockColors(bool changed) |
| 85 | { |
| 86 | SkASSERT(fColorLockCount != 0); |
| 87 | SkDEBUGCODE(fColorLockCount -= 1;) |
| 88 | if (changed) |
| 89 | this->inval16BitCache(); |
| 90 | } |
| 91 | |
| 92 | void SkColorTable::inval16BitCache() |
| 93 | { |
| 94 | SkASSERT(f16BitCacheLockCount == 0); |
| 95 | if (f16BitCache) |
| 96 | { |
| 97 | sk_free(f16BitCache); |
| 98 | f16BitCache = NULL; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | #include "SkColorPriv.h" |
| 103 | |
| 104 | static inline void build_16bitcache(uint16_t dst[], const SkPMColor src[], int count) |
| 105 | { |
| 106 | while (--count >= 0) |
| 107 | *dst++ = SkPixel32ToPixel16_ToU16(*src++); |
| 108 | } |
| 109 | |
| 110 | const uint16_t* SkColorTable::lock16BitCache() |
| 111 | { |
| 112 | if (fFlags & kColorsAreOpaque_Flag) |
| 113 | { |
| 114 | if (f16BitCache == NULL) // build the cache |
| 115 | { |
| 116 | f16BitCache = (uint16_t*)sk_malloc_throw(fCount * sizeof(uint16_t)); |
| 117 | build_16bitcache(f16BitCache, fColors, fCount); |
| 118 | } |
| 119 | } |
| 120 | else // our colors have alpha, so no cache |
| 121 | { |
| 122 | this->inval16BitCache(); |
| 123 | if (f16BitCache) |
| 124 | { |
| 125 | sk_free(f16BitCache); |
| 126 | f16BitCache = NULL; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | SkDEBUGCODE(f16BitCacheLockCount += 1); |
| 131 | return f16BitCache; |
| 132 | } |
| 133 | |
| 134 | /////////////////////////////////////////////////////////////////////////////// |
| 135 | |
| 136 | SkColorTable::SkColorTable(SkFlattenableReadBuffer& buffer) { |
| 137 | f16BitCache = NULL; |
| 138 | SkDEBUGCODE(fColorLockCount = 0;) |
| 139 | SkDEBUGCODE(f16BitCacheLockCount = 0;) |
| 140 | |
| 141 | fCount = buffer.readU16(); |
| 142 | SkASSERT((unsigned)fCount <= 256); |
| 143 | |
| 144 | fFlags = buffer.readU8(); |
| 145 | |
| 146 | fColors = (SkPMColor*)sk_malloc_throw(fCount * sizeof(SkPMColor)); |
| 147 | buffer.read(fColors, fCount * sizeof(SkPMColor)); |
| 148 | } |
| 149 | |
| 150 | void SkColorTable::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 151 | int count = this->count(); |
| 152 | buffer.write16(count); |
| 153 | buffer.write8(this->getFlags()); |
| 154 | buffer.writeMul4(fColors, count * sizeof(SkPMColor)); |
| 155 | } |
| 156 | |