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/*
* Copyright 2009 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkColorTable.h"
#include "SkFlattenableBuffers.h"
#include "SkStream.h"
#include "SkTemplates.h"
SK_DEFINE_INST_COUNT(SkColorTable)
SkColorTable::SkColorTable(int count)
: f16BitCache(NULL), fFlags(0)
{
if (count < 0)
count = 0;
else if (count > 256)
count = 256;
fCount = SkToU16(count);
fColors = (SkPMColor*)sk_malloc_throw(count * sizeof(SkPMColor));
memset(fColors, 0, count * sizeof(SkPMColor));
SkDEBUGCODE(fColorLockCount = 0;)
SkDEBUGCODE(f16BitCacheLockCount = 0;)
}
// As copy constructor is hidden in the class hierarchy, we need to call
// default constructor explicitly to suppress a compiler warning.
SkColorTable::SkColorTable(const SkColorTable& src) : INHERITED() {
f16BitCache = NULL;
fFlags = src.fFlags;
int count = src.count();
fCount = SkToU16(count);
fColors = reinterpret_cast<SkPMColor*>(
sk_malloc_throw(count * sizeof(SkPMColor)));
memcpy(fColors, src.fColors, count * sizeof(SkPMColor));
SkDEBUGCODE(fColorLockCount = 0;)
SkDEBUGCODE(f16BitCacheLockCount = 0;)
}
SkColorTable::SkColorTable(const SkPMColor colors[], int count)
: f16BitCache(NULL), fFlags(0)
{
if (count < 0)
count = 0;
else if (count > 256)
count = 256;
fCount = SkToU16(count);
fColors = reinterpret_cast<SkPMColor*>(
sk_malloc_throw(count * sizeof(SkPMColor)));
if (colors)
memcpy(fColors, colors, count * sizeof(SkPMColor));
SkDEBUGCODE(fColorLockCount = 0;)
SkDEBUGCODE(f16BitCacheLockCount = 0;)
}
SkColorTable::~SkColorTable()
{
SkASSERT(fColorLockCount == 0);
SkASSERT(f16BitCacheLockCount == 0);
sk_free(fColors);
sk_free(f16BitCache);
}
void SkColorTable::setFlags(unsigned flags)
{
fFlags = SkToU8(flags);
}
void SkColorTable::unlockColors(bool changed)
{
SkASSERT(fColorLockCount != 0);
SkDEBUGCODE(sk_atomic_dec(&fColorLockCount);)
if (changed)
this->inval16BitCache();
}
void SkColorTable::inval16BitCache()
{
SkASSERT(f16BitCacheLockCount == 0);
if (f16BitCache)
{
sk_free(f16BitCache);
f16BitCache = NULL;
}
}
#include "SkColorPriv.h"
static inline void build_16bitcache(uint16_t dst[], const SkPMColor src[], int count)
{
while (--count >= 0)
*dst++ = SkPixel32ToPixel16_ToU16(*src++);
}
const uint16_t* SkColorTable::lock16BitCache()
{
if (fFlags & kColorsAreOpaque_Flag)
{
if (f16BitCache == NULL) // build the cache
{
f16BitCache = (uint16_t*)sk_malloc_throw(fCount * sizeof(uint16_t));
build_16bitcache(f16BitCache, fColors, fCount);
}
}
else // our colors have alpha, so no cache
{
this->inval16BitCache();
if (f16BitCache)
{
sk_free(f16BitCache);
f16BitCache = NULL;
}
}
SkDEBUGCODE(f16BitCacheLockCount += 1);
return f16BitCache;
}
void SkColorTable::setIsOpaque(bool isOpaque) {
if (isOpaque) {
fFlags |= kColorsAreOpaque_Flag;
} else {
fFlags &= ~kColorsAreOpaque_Flag;
}
}
///////////////////////////////////////////////////////////////////////////////
SkColorTable::SkColorTable(SkFlattenableReadBuffer& buffer) {
f16BitCache = NULL;
SkDEBUGCODE(fColorLockCount = 0;)
SkDEBUGCODE(f16BitCacheLockCount = 0;)
fFlags = buffer.readUInt();
fCount = buffer.getArrayCount();
fColors = (SkPMColor*)sk_malloc_throw(fCount * sizeof(SkPMColor));
SkDEBUGCODE(const uint32_t countRead =) buffer.readColorArray(fColors);
#ifdef SK_DEBUG
SkASSERT((unsigned)fCount <= 256);
SkASSERT(countRead == fCount);
#endif
}
void SkColorTable::flatten(SkFlattenableWriteBuffer& buffer) const {
buffer.writeUInt(fFlags);
buffer.writeColorArray(fColors, fCount);
}
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