3 * Copyright 2009 The Android Open Source Project
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
10 #include "SkColorTable.h"
11 #include "SkReadBuffer.h"
12 #include "SkWriteBuffer.h"
14 #include "SkTemplates.h"
16 // As copy constructor is hidden in the class hierarchy, we need to call
17 // default constructor explicitly to suppress a compiler warning.
18 SkColorTable::SkColorTable(const SkColorTable& src) : INHERITED() {
20 fAlphaType = src.fAlphaType;
21 int count = src.count();
22 fCount = SkToU16(count);
23 fColors = reinterpret_cast<SkPMColor*>(
24 sk_malloc_throw(count * sizeof(SkPMColor)));
25 memcpy(fColors, src.fColors, count * sizeof(SkPMColor));
27 SkDEBUGCODE(fColorLockCount = 0;)
28 SkDEBUGCODE(f16BitCacheLockCount = 0;)
31 SkColorTable::SkColorTable(const SkPMColor colors[], int count, SkAlphaType at)
32 : f16BitCache(NULL), fAlphaType(SkToU8(at))
34 SkASSERT(0 == count || NULL != colors);
38 } else if (count > 256) {
42 fCount = SkToU16(count);
43 fColors = reinterpret_cast<SkPMColor*>(
44 sk_malloc_throw(count * sizeof(SkPMColor)));
46 memcpy(fColors, colors, count * sizeof(SkPMColor));
48 SkDEBUGCODE(fColorLockCount = 0;)
49 SkDEBUGCODE(f16BitCacheLockCount = 0;)
52 SkColorTable::~SkColorTable()
54 SkASSERT(fColorLockCount == 0);
55 SkASSERT(f16BitCacheLockCount == 0);
61 void SkColorTable::unlockColors() {
62 SkASSERT(fColorLockCount != 0);
63 SkDEBUGCODE(sk_atomic_dec(&fColorLockCount);)
66 #include "SkColorPriv.h"
68 static inline void build_16bitcache(uint16_t dst[], const SkPMColor src[],
70 while (--count >= 0) {
71 *dst++ = SkPixel32ToPixel16_ToU16(*src++);
75 const uint16_t* SkColorTable::lock16BitCache() {
76 if (this->isOpaque() && NULL == f16BitCache) {
77 f16BitCache = (uint16_t*)sk_malloc_throw(fCount * sizeof(uint16_t));
78 build_16bitcache(f16BitCache, fColors, fCount);
81 SkDEBUGCODE(f16BitCacheLockCount += 1);
85 ///////////////////////////////////////////////////////////////////////////////
87 SkColorTable::SkColorTable(SkReadBuffer& buffer) {
89 SkDEBUGCODE(fColorLockCount = 0;)
90 SkDEBUGCODE(f16BitCacheLockCount = 0;)
92 fAlphaType = SkToU8(buffer.readUInt());
93 fCount = buffer.getArrayCount();
94 size_t allocSize = fCount * sizeof(SkPMColor);
95 SkDEBUGCODE(bool success = false;)
96 if (buffer.validateAvailable(allocSize)) {
97 fColors = (SkPMColor*)sk_malloc_throw(allocSize);
98 SkDEBUGCODE(success =) buffer.readColorArray(fColors, fCount);
104 SkASSERT((unsigned)fCount <= 256);
109 void SkColorTable::writeToBuffer(SkWriteBuffer& buffer) const {
110 buffer.writeUInt(fAlphaType);
111 buffer.writeColorArray(fColors, fCount);