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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 "SkData.h"
#include "SkImageInfo.h"
#include "SkMalloc.h"
#include "SkMallocPixelRef.h"
#include "SkSafeMath.h"
void* sk_calloc_throw(size_t count, size_t elemSize) {
return sk_calloc_throw(SkSafeMath::Mul(count, elemSize));
}
void* sk_malloc_throw(size_t count, size_t elemSize) {
return sk_malloc_throw(SkSafeMath::Mul(count, elemSize));
}
void* sk_realloc_throw(void* buffer, size_t count, size_t elemSize) {
return sk_realloc_throw(buffer, SkSafeMath::Mul(count, elemSize));
}
void* sk_malloc_canfail(size_t count, size_t elemSize) {
return sk_malloc_canfail(SkSafeMath::Mul(count, elemSize));
}
///////////////////////////////////////////////////////////////////////////////////////////////////
// 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) {
if (info.width() < 0 || info.height() < 0 ||
(unsigned)info.colorType() > (unsigned)kLastEnum_SkColorType ||
(unsigned)info.alphaType() > (unsigned)kLastEnum_SkAlphaType)
{
return false;
}
return true;
}
sk_sp<SkPixelRef> SkMallocPixelRef::MakeDirect(const SkImageInfo& info,
void* addr,
size_t rowBytes) {
if (!is_valid(info)) {
return nullptr;
}
return sk_sp<SkPixelRef>(new SkMallocPixelRef(info, addr, rowBytes, nullptr, nullptr));
}
sk_sp<SkPixelRef> SkMallocPixelRef::MakeUsing(void*(*allocProc)(size_t),
const SkImageInfo& info,
size_t requestedRowBytes) {
size_t rowBytes = requestedRowBytes;
if (rowBytes == 0) {
rowBytes = info.minRowBytes();
// rowBytes can still be zero, if it overflowed (width * bytesPerPixel > size_t)
// or if colortype is unknown
}
if (!is_valid(info) || !info.validRowBytes(rowBytes)) {
return nullptr;
}
size_t size = 0;
if (!info.isEmpty() && rowBytes) {
size = info.computeByteSize(rowBytes);
if (SkImageInfo::ByteSizeOverflowed(size)) {
return nullptr;
}
}
void* addr = allocProc(size);
if (nullptr == addr) {
return nullptr;
}
return sk_sp<SkPixelRef>(new SkMallocPixelRef(info, addr, rowBytes,
sk_free_releaseproc, nullptr));
}
sk_sp<SkPixelRef> SkMallocPixelRef::MakeAllocate(const SkImageInfo& info, size_t rowBytes) {
return MakeUsing(sk_malloc_canfail, info, rowBytes);
}
sk_sp<SkPixelRef> SkMallocPixelRef::MakeZeroed(const SkImageInfo& info,
size_t rowBytes) {
return MakeUsing(sk_calloc_canfail, info, rowBytes);
}
static void sk_data_releaseproc(void*, void* dataPtr) {
(static_cast<SkData*>(dataPtr))->unref();
}
sk_sp<SkPixelRef> SkMallocPixelRef::MakeWithProc(const SkImageInfo& info,
size_t rowBytes,
void* addr,
SkMallocPixelRef::ReleaseProc proc,
void* context) {
if (!is_valid(info)) {
if (proc) {
proc(addr, context);
}
return nullptr;
}
return sk_sp<SkPixelRef>(new SkMallocPixelRef(info, addr, rowBytes, proc, context));
}
sk_sp<SkPixelRef> SkMallocPixelRef::MakeWithData(const SkImageInfo& info,
size_t rowBytes,
sk_sp<SkData> data) {
SkASSERT(data != nullptr);
if (!is_valid(info)) {
return nullptr;
}
// TODO: what should we return if computeByteSize returns 0?
// - the info was empty?
// - we overflowed computing the size?
if ((rowBytes < info.minRowBytes()) || (data->size() < info.computeByteSize(rowBytes))) {
return nullptr;
}
// must get this address before we call release
void* pixels = const_cast<void*>(data->data());
SkPixelRef* pr = new SkMallocPixelRef(info, pixels, rowBytes,
sk_data_releaseproc, data.release());
pr->setImmutable(); // since we were created with (immutable) data
return sk_sp<SkPixelRef>(pr);
}
///////////////////////////////////////////////////////////////////////////////
SkMallocPixelRef::SkMallocPixelRef(const SkImageInfo& info, void* storage,
size_t rowBytes,
SkMallocPixelRef::ReleaseProc proc,
void* context)
: INHERITED(info.width(), info.height(), storage, rowBytes)
, fReleaseProc(proc)
, fReleaseProcContext(context)
{}
SkMallocPixelRef::~SkMallocPixelRef() {
if (fReleaseProc != nullptr) {
fReleaseProc(this->pixels(), fReleaseProcContext);
}
}
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