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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 "SkReadBuffer.h"
#include "SkWriteBuffer.h"
#include "SkStream.h"
#include "SkTemplates.h"
void SkColorTable::init(const SkPMColor colors[], int count) {
SkASSERT((unsigned)count <= 256);
f16BitCache = NULL;
fCount = count;
fColors = reinterpret_cast<SkPMColor*>(sk_malloc_throw(count * sizeof(SkPMColor)));
memcpy(fColors, colors, 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() {
this->init(src.fColors, src.fCount);
}
SkColorTable::SkColorTable(const SkPMColor colors[], int count) {
SkASSERT(0 == count || colors);
if (count < 0) {
count = 0;
} else if (count > 256) {
count = 256;
}
this->init(colors, count);
}
SkColorTable::~SkColorTable() {
SkASSERT(fColorLockCount == 0);
SkASSERT(f16BitCacheLockCount == 0);
sk_free(fColors);
sk_free(f16BitCache);
}
void SkColorTable::unlockColors() {
SkASSERT(fColorLockCount != 0);
SkDEBUGCODE(sk_atomic_dec(&fColorLockCount);)
}
#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 (NULL == f16BitCache) {
f16BitCache = (uint16_t*)sk_malloc_throw(fCount * sizeof(uint16_t));
build_16bitcache(f16BitCache, fColors, fCount);
}
SkDEBUGCODE(f16BitCacheLockCount += 1);
return f16BitCache;
}
///////////////////////////////////////////////////////////////////////////////
SkColorTable::SkColorTable(SkReadBuffer& buffer) {
f16BitCache = NULL;
SkDEBUGCODE(fColorLockCount = 0;)
SkDEBUGCODE(f16BitCacheLockCount = 0;)
if (buffer.isVersionLT(SkReadBuffer::kRemoveColorTableAlpha_Version)) {
/*fAlphaType = */buffer.readUInt();
}
fCount = buffer.getArrayCount();
size_t allocSize = fCount * sizeof(SkPMColor);
SkDEBUGCODE(bool success = false;)
if (buffer.validateAvailable(allocSize)) {
fColors = (SkPMColor*)sk_malloc_throw(allocSize);
SkDEBUGCODE(success =) buffer.readColorArray(fColors, fCount);
} else {
fCount = 0;
fColors = NULL;
}
#ifdef SK_DEBUG
SkASSERT((unsigned)fCount <= 256);
SkASSERT(success);
#endif
}
void SkColorTable::writeToBuffer(SkWriteBuffer& buffer) const {
buffer.writeColorArray(fColors, fCount);
}
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