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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkMallocPixelRef.h"
#include "SkBitmap.h"
#include "SkReadBuffer.h"
#include "SkWriteBuffer.h"
// assumes ptr was allocated via sk_malloc
static void sk_free_releaseproc(void* ptr, void*) {
sk_free(ptr);
}
static bool is_valid(const SkImageInfo& info, SkColorTable* ctable) {
if (info.fWidth < 0 ||
info.fHeight < 0 ||
(unsigned)info.fColorType > (unsigned)kLastEnum_SkColorType ||
(unsigned)info.fAlphaType > (unsigned)kLastEnum_SkAlphaType)
{
return false;
}
// these seem like good checks, but currently we have (at least) tests
// that expect the pixelref to succeed even when there is a mismatch
// with colortables. fix?
#if 0
if (kIndex8_SkColorType == info.fColorType && NULL == ctable) {
return false;
}
if (kIndex8_SkColorType != info.fColorType && NULL != ctable) {
return false;
}
#endif
return true;
}
SkMallocPixelRef* SkMallocPixelRef::NewDirect(const SkImageInfo& info,
void* addr,
size_t rowBytes,
SkColorTable* ctable) {
if (!is_valid(info, ctable)) {
return NULL;
}
return SkNEW_ARGS(SkMallocPixelRef,
(info, addr, rowBytes, ctable, NULL, NULL));
}
SkMallocPixelRef* SkMallocPixelRef::NewAllocate(const SkImageInfo& info,
size_t requestedRowBytes,
SkColorTable* ctable) {
if (!is_valid(info, ctable)) {
return NULL;
}
int32_t minRB = SkToS32(info.minRowBytes());
if (minRB < 0) {
return NULL; // allocation will be too large
}
if (requestedRowBytes > 0 && (int32_t)requestedRowBytes < minRB) {
return NULL; // cannot meet requested rowbytes
}
int32_t rowBytes;
if (requestedRowBytes) {
rowBytes = SkToS32(requestedRowBytes);
} else {
rowBytes = minRB;
}
int64_t bigSize = (int64_t)info.fHeight * rowBytes;
if (!sk_64_isS32(bigSize)) {
return NULL;
}
size_t size = sk_64_asS32(bigSize);
SkASSERT(size >= info.getSafeSize(rowBytes));
void* addr = sk_malloc_flags(size, 0);
if (NULL == addr) {
return NULL;
}
return SkNEW_ARGS(SkMallocPixelRef,
(info, addr, rowBytes, ctable,
sk_free_releaseproc, NULL));
}
SkMallocPixelRef* SkMallocPixelRef::NewWithProc(const SkImageInfo& info,
size_t rowBytes,
SkColorTable* ctable,
void* addr,
SkMallocPixelRef::ReleaseProc proc,
void* context) {
if (!is_valid(info, ctable)) {
return NULL;
}
return SkNEW_ARGS(SkMallocPixelRef,
(info, addr, rowBytes, ctable, proc, context));
}
static void sk_data_releaseproc(void*, void* dataPtr) {
(static_cast<SkData*>(dataPtr))->unref();
}
SkMallocPixelRef* SkMallocPixelRef::NewWithData(const SkImageInfo& info,
size_t rowBytes,
SkColorTable* ctable,
SkData* data) {
SkASSERT(data != NULL);
if (!is_valid(info, ctable)) {
return NULL;
}
if ((rowBytes < info.minRowBytes())
|| (data->size() < info.getSafeSize(rowBytes))) {
return NULL;
}
data->ref();
SkMallocPixelRef* pr
= SkNEW_ARGS(SkMallocPixelRef,
(info, const_cast<void*>(data->data()), rowBytes, ctable,
sk_data_releaseproc, static_cast<void*>(data)));
SkASSERT(pr != NULL);
// We rely on the immutability of the pixels to make the
// const_cast okay.
pr->setImmutable();
return pr;
}
///////////////////////////////////////////////////////////////////////////////
SkMallocPixelRef::SkMallocPixelRef(const SkImageInfo& info, void* storage,
size_t rowBytes, SkColorTable* ctable,
bool ownsPixels)
: INHERITED(info)
, fReleaseProc(ownsPixels ? sk_free_releaseproc : NULL)
, fReleaseProcContext(NULL) {
// This constructor is now DEPRICATED.
SkASSERT(is_valid(info, ctable));
SkASSERT(rowBytes >= info.minRowBytes());
if (kIndex_8_SkColorType != info.fColorType) {
ctable = NULL;
}
fStorage = storage;
fCTable = ctable;
fRB = rowBytes;
SkSafeRef(ctable);
this->setPreLocked(fStorage, rowBytes, fCTable);
}
SkMallocPixelRef::SkMallocPixelRef(const SkImageInfo& info, void* storage,
size_t rowBytes, SkColorTable* ctable,
SkMallocPixelRef::ReleaseProc proc,
void* context)
: INHERITED(info)
, fReleaseProc(proc)
, fReleaseProcContext(context)
{
SkASSERT(is_valid(info, ctable));
SkASSERT(rowBytes >= info.minRowBytes());
if (kIndex_8_SkColorType != info.fColorType) {
ctable = NULL;
}
fStorage = storage;
fCTable = ctable;
fRB = rowBytes;
SkSafeRef(ctable);
this->setPreLocked(fStorage, rowBytes, fCTable);
}
SkMallocPixelRef::~SkMallocPixelRef() {
SkSafeUnref(fCTable);
if (fReleaseProc != NULL) {
fReleaseProc(fStorage, fReleaseProcContext);
}
}
bool SkMallocPixelRef::onNewLockPixels(LockRec* rec) {
rec->fPixels = fStorage;
rec->fRowBytes = fRB;
rec->fColorTable = fCTable;
return true;
}
void SkMallocPixelRef::onUnlockPixels() {
// nothing to do
}
size_t SkMallocPixelRef::getAllocatedSizeInBytes() const {
return this->info().getSafeSize(fRB);
}
#ifdef SK_SUPPORT_LEGACY_PIXELREF_UNFLATTENABLE
SkMallocPixelRef::SkMallocPixelRef(SkReadBuffer& buffer)
: INHERITED(buffer, NULL)
, fReleaseProc(sk_free_releaseproc)
, fReleaseProcContext(NULL)
{
fRB = buffer.read32();
size_t size = buffer.isValid() ? this->info().getSafeSize(fRB) : 0;
if (buffer.validateAvailable(size)) {
fStorage = sk_malloc_throw(size);
buffer.readByteArray(fStorage, size);
} else {
fStorage = NULL;
}
if (buffer.readBool()) {
fCTable = SkNEW_ARGS(SkColorTable, (buffer));
} else {
fCTable = NULL;
}
this->setPreLocked(fStorage, fRB, fCTable);
}
#endif
///////////////////////////////////////////////////////////////////////////////
SkPixelRef* SkMallocPixelRef::PRFactory::create(const SkImageInfo& info, size_t rowBytes,
SkColorTable* ctable) {
return SkMallocPixelRef::NewAllocate(info, rowBytes, ctable);
}
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