| /* |
| * Copyright 2008 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 "SkAtomics.h" |
| #include "SkBitmap.h" |
| #include "SkColorPriv.h" |
| #include "SkColorTable.h" |
| #include "SkConvertPixels.h" |
| #include "SkData.h" |
| #include "SkFilterQuality.h" |
| #include "SkHalf.h" |
| #include "SkImageInfoPriv.h" |
| #include "SkMallocPixelRef.h" |
| #include "SkMask.h" |
| #include "SkMath.h" |
| #include "SkPixelRef.h" |
| #include "SkReadBuffer.h" |
| #include "SkRect.h" |
| #include "SkScalar.h" |
| #include "SkTemplates.h" |
| #include "SkUnPreMultiply.h" |
| #include "SkWriteBuffer.h" |
| #include "SkWritePixelsRec.h" |
| |
| #include <string.h> |
| |
| static bool reset_return_false(SkBitmap* bm) { |
| bm->reset(); |
| return false; |
| } |
| |
| SkBitmap::SkBitmap() |
| : fPixels (nullptr) |
| , fPixelRefOrigin{0, 0} |
| , fRowBytes (0) |
| , fFlags (0) {} |
| |
| SkBitmap::SkBitmap(const SkBitmap& src) |
| : fPixelRef (src.fPixelRef) |
| , fPixels (src.fPixels) |
| , fPixelRefOrigin(src.fPixelRefOrigin) |
| , fInfo (src.fInfo) |
| , fRowBytes (src.fRowBytes) |
| , fFlags (src.fFlags) |
| { |
| SkDEBUGCODE(src.validate();) |
| SkDEBUGCODE(this->validate();) |
| } |
| |
| SkBitmap::SkBitmap(SkBitmap&& other) |
| : fPixelRef (std::move(other.fPixelRef)) |
| , fPixels (other.fPixels) |
| , fPixelRefOrigin (other.fPixelRefOrigin) |
| , fInfo (std::move(other.fInfo)) |
| , fRowBytes (other.fRowBytes) |
| , fFlags (other.fFlags) |
| { |
| SkASSERT(!other.fPixelRef); |
| other.fInfo.reset(); |
| other.fPixels = nullptr; |
| other.fPixelRefOrigin = SkIPoint{0, 0}; |
| other.fRowBytes = 0; |
| other.fFlags = 0; |
| } |
| |
| SkBitmap::~SkBitmap() {} |
| |
| SkBitmap& SkBitmap::operator=(const SkBitmap& src) { |
| if (this != &src) { |
| fPixelRef = src.fPixelRef; |
| fPixels = src.fPixels; |
| fPixelRefOrigin = src.fPixelRefOrigin; |
| fInfo = src.fInfo; |
| fRowBytes = src.fRowBytes; |
| fFlags = src.fFlags; |
| } |
| SkDEBUGCODE(this->validate();) |
| return *this; |
| } |
| |
| SkBitmap& SkBitmap::operator=(SkBitmap&& other) { |
| if (this != &other) { |
| fPixelRef = std::move(other.fPixelRef); |
| fInfo = std::move(other.fInfo); |
| fPixels = other.fPixels; |
| fPixelRefOrigin = other.fPixelRefOrigin; |
| fRowBytes = other.fRowBytes; |
| fFlags = other.fFlags; |
| SkASSERT(!other.fPixelRef); |
| other.fInfo.reset(); |
| other.fPixels = nullptr; |
| other.fPixelRefOrigin = SkIPoint{0, 0}; |
| other.fRowBytes = 0; |
| other.fFlags = 0; |
| } |
| return *this; |
| } |
| |
| void SkBitmap::swap(SkBitmap& other) { |
| SkTSwap(*this, other); |
| SkDEBUGCODE(this->validate();) |
| } |
| |
| void SkBitmap::reset() { |
| this->freePixels(); |
| this->fInfo.reset(); |
| sk_bzero(this, sizeof(*this)); |
| } |
| |
| void SkBitmap::getBounds(SkRect* bounds) const { |
| SkASSERT(bounds); |
| bounds->set(0, 0, |
| SkIntToScalar(fInfo.width()), SkIntToScalar(fInfo.height())); |
| } |
| |
| void SkBitmap::getBounds(SkIRect* bounds) const { |
| SkASSERT(bounds); |
| bounds->set(0, 0, fInfo.width(), fInfo.height()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkBitmap::setInfo(const SkImageInfo& info, size_t rowBytes) { |
| SkAlphaType newAT = info.alphaType(); |
| if (!SkColorTypeValidateAlphaType(info.colorType(), info.alphaType(), &newAT)) { |
| return reset_return_false(this); |
| } |
| // don't look at info.alphaType(), since newAT is the real value... |
| |
| // require that rowBytes fit in 31bits |
| int64_t mrb = info.minRowBytes64(); |
| if ((int32_t)mrb != mrb) { |
| return reset_return_false(this); |
| } |
| if ((int64_t)rowBytes != (int32_t)rowBytes) { |
| return reset_return_false(this); |
| } |
| |
| if (info.width() < 0 || info.height() < 0) { |
| return reset_return_false(this); |
| } |
| |
| if (kUnknown_SkColorType == info.colorType()) { |
| rowBytes = 0; |
| } else if (0 == rowBytes) { |
| rowBytes = (size_t)mrb; |
| } else if (!info.validRowBytes(rowBytes)) { |
| return reset_return_false(this); |
| } |
| |
| this->freePixels(); |
| |
| fInfo = info.makeAlphaType(newAT); |
| fRowBytes = SkToU32(rowBytes); |
| SkDEBUGCODE(this->validate();) |
| return true; |
| } |
| |
| bool SkBitmap::setAlphaType(SkAlphaType newAlphaType) { |
| if (!SkColorTypeValidateAlphaType(fInfo.colorType(), newAlphaType, &newAlphaType)) { |
| return false; |
| } |
| if (fInfo.alphaType() != newAlphaType) { |
| fInfo = fInfo.makeAlphaType(newAlphaType); |
| } |
| SkDEBUGCODE(this->validate();) |
| return true; |
| } |
| |
| void SkBitmap::updatePixelsFromRef() { |
| void* p = nullptr; |
| if (fPixelRef) { |
| // wish we could assert that a pixelref *always* has pixels |
| p = fPixelRef->pixels(); |
| if (p) { |
| SkASSERT(fRowBytes == fPixelRef->rowBytes()); |
| p = (char*)p |
| + fPixelRefOrigin.fY * fRowBytes |
| + fPixelRefOrigin.fX * fInfo.bytesPerPixel(); |
| } |
| } |
| fPixels = p; |
| } |
| |
| void SkBitmap::setPixelRef(sk_sp<SkPixelRef> pr, int dx, int dy) { |
| #ifdef SK_DEBUG |
| if (pr) { |
| if (kUnknown_SkColorType != fInfo.colorType()) { |
| SkASSERT(fInfo.width() + dx <= pr->width()); |
| SkASSERT(fInfo.height() + dy <= pr->height()); |
| } |
| } |
| #endif |
| |
| fPixelRef = std::move(pr); |
| if (fPixelRef) { |
| fPixelRefOrigin.set(SkTPin(dx, 0, fPixelRef->width()), SkTPin(dy, 0, fPixelRef->height())); |
| this->updatePixelsFromRef(); |
| } else { |
| // ignore dx,dy if there is no pixelref |
| fPixelRefOrigin.setZero(); |
| fPixels = nullptr; |
| } |
| |
| SkDEBUGCODE(this->validate();) |
| } |
| |
| void SkBitmap::setPixels(void* p) { |
| if (nullptr == p) { |
| this->setPixelRef(nullptr, 0, 0); |
| return; |
| } |
| |
| if (kUnknown_SkColorType == fInfo.colorType()) { |
| this->setPixelRef(nullptr, 0, 0); |
| return; |
| } |
| |
| this->setPixelRef(SkMallocPixelRef::MakeDirect(fInfo, p, fRowBytes), 0, 0); |
| if (!fPixelRef) { |
| return; |
| } |
| SkDEBUGCODE(this->validate();) |
| } |
| |
| bool SkBitmap::tryAllocPixels(Allocator* allocator) { |
| HeapAllocator stdalloc; |
| |
| if (nullptr == allocator) { |
| allocator = &stdalloc; |
| } |
| return allocator->allocPixelRef(this); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkBitmap::tryAllocPixels(const SkImageInfo& requestedInfo, size_t rowBytes) { |
| if (!this->setInfo(requestedInfo, rowBytes)) { |
| return reset_return_false(this); |
| } |
| |
| // setInfo may have corrected info (e.g. 565 is always opaque). |
| const SkImageInfo& correctedInfo = this->info(); |
| // setInfo may have computed a valid rowbytes if 0 were passed in |
| rowBytes = this->rowBytes(); |
| |
| sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeAllocate(correctedInfo, rowBytes); |
| if (!pr) { |
| return reset_return_false(this); |
| } |
| this->setPixelRef(std::move(pr), 0, 0); |
| if (nullptr == this->getPixels()) { |
| return reset_return_false(this); |
| } |
| SkDEBUGCODE(this->validate();) |
| return true; |
| } |
| |
| bool SkBitmap::tryAllocPixelsFlags(const SkImageInfo& requestedInfo, uint32_t allocFlags) { |
| if (!this->setInfo(requestedInfo)) { |
| return reset_return_false(this); |
| } |
| |
| // setInfo may have corrected info (e.g. 565 is always opaque). |
| const SkImageInfo& correctedInfo = this->info(); |
| |
| sk_sp<SkPixelRef> pr = (allocFlags & kZeroPixels_AllocFlag) ? |
| SkMallocPixelRef::MakeZeroed(correctedInfo, correctedInfo.minRowBytes()) : |
| SkMallocPixelRef::MakeAllocate(correctedInfo, correctedInfo.minRowBytes()); |
| if (!pr) { |
| return reset_return_false(this); |
| } |
| this->setPixelRef(std::move(pr), 0, 0); |
| if (nullptr == this->getPixels()) { |
| return reset_return_false(this); |
| } |
| SkDEBUGCODE(this->validate();) |
| return true; |
| } |
| |
| static void invoke_release_proc(void (*proc)(void* pixels, void* ctx), void* pixels, void* ctx) { |
| if (proc) { |
| proc(pixels, ctx); |
| } |
| } |
| |
| bool SkBitmap::installPixels(const SkImageInfo& requestedInfo, void* pixels, size_t rb, |
| void (*releaseProc)(void* addr, void* context), void* context) { |
| if (!this->setInfo(requestedInfo, rb)) { |
| invoke_release_proc(releaseProc, pixels, context); |
| this->reset(); |
| return false; |
| } |
| if (nullptr == pixels) { |
| invoke_release_proc(releaseProc, pixels, context); |
| return true; // we behaved as if they called setInfo() |
| } |
| |
| // setInfo may have corrected info (e.g. 565 is always opaque). |
| const SkImageInfo& correctedInfo = this->info(); |
| |
| sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeWithProc(correctedInfo, rb, pixels, |
| releaseProc, context); |
| if (!pr) { |
| this->reset(); |
| return false; |
| } |
| |
| this->setPixelRef(std::move(pr), 0, 0); |
| SkDEBUGCODE(this->validate();) |
| return true; |
| } |
| |
| bool SkBitmap::installPixels(const SkPixmap& pixmap) { |
| return this->installPixels(pixmap.info(), pixmap.writable_addr(), pixmap.rowBytes(), |
| nullptr, nullptr); |
| } |
| |
| bool SkBitmap::installMaskPixels(const SkMask& mask) { |
| if (SkMask::kA8_Format != mask.fFormat) { |
| this->reset(); |
| return false; |
| } |
| return this->installPixels(SkImageInfo::MakeA8(mask.fBounds.width(), |
| mask.fBounds.height()), |
| mask.fImage, mask.fRowBytes); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkBitmap::freePixels() { |
| fPixelRef = nullptr; |
| fPixelRefOrigin.setZero(); |
| fPixels = nullptr; |
| } |
| |
| uint32_t SkBitmap::getGenerationID() const { |
| return fPixelRef ? fPixelRef->getGenerationID() : 0; |
| } |
| |
| void SkBitmap::notifyPixelsChanged() const { |
| SkASSERT(!this->isImmutable()); |
| if (fPixelRef) { |
| fPixelRef->notifyPixelsChanged(); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** We explicitly use the same allocator for our pixels that SkMask does, |
| so that we can freely assign memory allocated by one class to the other. |
| */ |
| bool SkBitmap::HeapAllocator::allocPixelRef(SkBitmap* dst) { |
| const SkImageInfo info = dst->info(); |
| if (kUnknown_SkColorType == info.colorType()) { |
| // SkDebugf("unsupported config for info %d\n", dst->config()); |
| return false; |
| } |
| |
| sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeAllocate(info, dst->rowBytes()); |
| if (!pr) { |
| return false; |
| } |
| |
| dst->setPixelRef(std::move(pr), 0, 0); |
| SkDEBUGCODE(dst->validate();) |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkBitmap::isImmutable() const { |
| return fPixelRef ? fPixelRef->isImmutable() : false; |
| } |
| |
| void SkBitmap::setImmutable() { |
| if (fPixelRef) { |
| fPixelRef->setImmutable(); |
| } |
| } |
| |
| bool SkBitmap::isVolatile() const { |
| return (fFlags & kImageIsVolatile_Flag) != 0; |
| } |
| |
| void SkBitmap::setIsVolatile(bool isVolatile) { |
| if (isVolatile) { |
| fFlags |= kImageIsVolatile_Flag; |
| } else { |
| fFlags &= ~kImageIsVolatile_Flag; |
| } |
| } |
| |
| void* SkBitmap::getAddr(int x, int y) const { |
| SkASSERT((unsigned)x < (unsigned)this->width()); |
| SkASSERT((unsigned)y < (unsigned)this->height()); |
| |
| char* base = (char*)this->getPixels(); |
| if (base) { |
| base += y * this->rowBytes(); |
| switch (this->colorType()) { |
| case kRGBA_F16_SkColorType: |
| base += x << 3; |
| break; |
| case kRGBA_8888_SkColorType: |
| case kBGRA_8888_SkColorType: |
| base += x << 2; |
| break; |
| case kARGB_4444_SkColorType: |
| case kRGB_565_SkColorType: |
| base += x << 1; |
| break; |
| case kAlpha_8_SkColorType: |
| case kGray_8_SkColorType: |
| base += x; |
| break; |
| default: |
| SkDEBUGFAIL("Can't return addr for config"); |
| base = nullptr; |
| break; |
| } |
| } |
| return base; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkBitmap::erase(SkColor c, const SkIRect& area) const { |
| SkDEBUGCODE(this->validate();) |
| |
| switch (fInfo.colorType()) { |
| case kUnknown_SkColorType: |
| // TODO: can we ASSERT that we never get here? |
| return; // can't erase. Should we bzero so the memory is not uninitialized? |
| default: |
| break; |
| } |
| |
| SkPixmap result; |
| if (!this->peekPixels(&result)) { |
| return; |
| } |
| |
| if (result.erase(c, area)) { |
| this->notifyPixelsChanged(); |
| } |
| } |
| |
| void SkBitmap::eraseColor(SkColor c) const { |
| this->erase(c, SkIRect::MakeWH(this->width(), this->height())); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////////// |
| ////////////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkBitmap::extractSubset(SkBitmap* result, const SkIRect& subset) const { |
| SkDEBUGCODE(this->validate();) |
| |
| if (nullptr == result || !fPixelRef) { |
| return false; // no src pixels |
| } |
| |
| SkIRect srcRect, r; |
| srcRect.set(0, 0, this->width(), this->height()); |
| if (!r.intersect(srcRect, subset)) { |
| return false; // r is empty (i.e. no intersection) |
| } |
| |
| // If the upper left of the rectangle was outside the bounds of this SkBitmap, we should have |
| // exited above. |
| SkASSERT(static_cast<unsigned>(r.fLeft) < static_cast<unsigned>(this->width())); |
| SkASSERT(static_cast<unsigned>(r.fTop) < static_cast<unsigned>(this->height())); |
| |
| SkBitmap dst; |
| dst.setInfo(this->info().makeWH(r.width(), r.height()), this->rowBytes()); |
| dst.setIsVolatile(this->isVolatile()); |
| |
| if (fPixelRef) { |
| SkIPoint origin = fPixelRefOrigin; |
| origin.fX += r.fLeft; |
| origin.fY += r.fTop; |
| // share the pixelref with a custom offset |
| dst.setPixelRef(fPixelRef, origin.x(), origin.y()); |
| } |
| SkDEBUGCODE(dst.validate();) |
| |
| // we know we're good, so commit to result |
| result->swap(dst); |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkBitmap::readPixels(const SkImageInfo& requestedDstInfo, void* dstPixels, size_t dstRB, |
| int x, int y, SkTransferFunctionBehavior behavior) const { |
| SkPixmap src; |
| if (!this->peekPixels(&src)) { |
| return false; |
| } |
| return src.readPixels(requestedDstInfo, dstPixels, dstRB, x, y, behavior); |
| } |
| |
| bool SkBitmap::readPixels(const SkPixmap& dst, int srcX, int srcY) const { |
| return this->readPixels(dst.info(), dst.writable_addr(), dst.rowBytes(), srcX, srcY); |
| } |
| |
| bool SkBitmap::writePixels(const SkPixmap& src, int dstX, int dstY, |
| SkTransferFunctionBehavior behavior) { |
| if (!SkImageInfoValidConversion(fInfo, src.info())) { |
| return false; |
| } |
| |
| SkWritePixelsRec rec(src.info(), src.addr(), src.rowBytes(), dstX, dstY); |
| if (!rec.trim(fInfo.width(), fInfo.height())) { |
| return false; |
| } |
| |
| void* dstPixels = this->getAddr(rec.fX, rec.fY); |
| const SkImageInfo dstInfo = fInfo.makeWH(rec.fInfo.width(), rec.fInfo.height()); |
| SkConvertPixels(dstInfo, dstPixels, this->rowBytes(), rec.fInfo, rec.fPixels, rec.fRowBytes, |
| nullptr, behavior); |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool GetBitmapAlpha(const SkBitmap& src, uint8_t* SK_RESTRICT alpha, int alphaRowBytes) { |
| SkASSERT(alpha != nullptr); |
| SkASSERT(alphaRowBytes >= src.width()); |
| |
| SkPixmap pmap; |
| if (!src.peekPixels(&pmap)) { |
| for (int y = 0; y < src.height(); ++y) { |
| memset(alpha, 0, src.width()); |
| alpha += alphaRowBytes; |
| } |
| return false; |
| } |
| SkConvertPixels(SkImageInfo::MakeA8(pmap.width(), pmap.height()), alpha, alphaRowBytes, |
| pmap.info(), pmap.addr(), pmap.rowBytes(), nullptr, |
| SkTransferFunctionBehavior::kRespect); |
| return true; |
| } |
| |
| #include "SkPaint.h" |
| #include "SkMaskFilter.h" |
| #include "SkMatrix.h" |
| |
| bool SkBitmap::extractAlpha(SkBitmap* dst, const SkPaint* paint, |
| Allocator *allocator, SkIPoint* offset) const { |
| SkDEBUGCODE(this->validate();) |
| |
| SkBitmap tmpBitmap; |
| SkMatrix identity; |
| SkMask srcM, dstM; |
| |
| srcM.fBounds.set(0, 0, this->width(), this->height()); |
| srcM.fRowBytes = SkAlign4(this->width()); |
| srcM.fFormat = SkMask::kA8_Format; |
| |
| SkMaskFilter* filter = paint ? paint->getMaskFilter() : nullptr; |
| |
| // compute our (larger?) dst bounds if we have a filter |
| if (filter) { |
| identity.reset(); |
| if (!filter->filterMask(&dstM, srcM, identity, nullptr)) { |
| goto NO_FILTER_CASE; |
| } |
| dstM.fRowBytes = SkAlign4(dstM.fBounds.width()); |
| } else { |
| NO_FILTER_CASE: |
| tmpBitmap.setInfo(SkImageInfo::MakeA8(this->width(), this->height()), srcM.fRowBytes); |
| if (!tmpBitmap.tryAllocPixels(allocator)) { |
| // Allocation of pixels for alpha bitmap failed. |
| SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n", |
| tmpBitmap.width(), tmpBitmap.height()); |
| return false; |
| } |
| GetBitmapAlpha(*this, tmpBitmap.getAddr8(0, 0), srcM.fRowBytes); |
| if (offset) { |
| offset->set(0, 0); |
| } |
| tmpBitmap.swap(*dst); |
| return true; |
| } |
| srcM.fImage = SkMask::AllocImage(srcM.computeImageSize()); |
| SkAutoMaskFreeImage srcCleanup(srcM.fImage); |
| |
| GetBitmapAlpha(*this, srcM.fImage, srcM.fRowBytes); |
| if (!filter->filterMask(&dstM, srcM, identity, nullptr)) { |
| goto NO_FILTER_CASE; |
| } |
| SkAutoMaskFreeImage dstCleanup(dstM.fImage); |
| |
| tmpBitmap.setInfo(SkImageInfo::MakeA8(dstM.fBounds.width(), dstM.fBounds.height()), |
| dstM.fRowBytes); |
| if (!tmpBitmap.tryAllocPixels(allocator)) { |
| // Allocation of pixels for alpha bitmap failed. |
| SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n", |
| tmpBitmap.width(), tmpBitmap.height()); |
| return false; |
| } |
| memcpy(tmpBitmap.getPixels(), dstM.fImage, dstM.computeImageSize()); |
| if (offset) { |
| offset->set(dstM.fBounds.fLeft, dstM.fBounds.fTop); |
| } |
| SkDEBUGCODE(tmpBitmap.validate();) |
| |
| tmpBitmap.swap(*dst); |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static void write_raw_pixels(SkWriteBuffer* buffer, const SkPixmap& pmap) { |
| const SkImageInfo& info = pmap.info(); |
| const size_t snugRB = info.width() * info.bytesPerPixel(); |
| const char* src = (const char*)pmap.addr(); |
| const size_t ramRB = pmap.rowBytes(); |
| |
| buffer->write32(SkToU32(snugRB)); |
| info.flatten(*buffer); |
| |
| const size_t size = snugRB * info.height(); |
| SkAutoTMalloc<char> storage(size); |
| char* dst = storage.get(); |
| for (int y = 0; y < info.height(); ++y) { |
| memcpy(dst, src, snugRB); |
| dst += snugRB; |
| src += ramRB; |
| } |
| buffer->writeByteArray(storage.get(), size); |
| // no colortable |
| buffer->writeBool(false); |
| } |
| |
| void SkBitmap::WriteRawPixels(SkWriteBuffer* buffer, const SkBitmap& bitmap) { |
| const SkImageInfo info = bitmap.info(); |
| if (0 == info.width() || 0 == info.height() || bitmap.isNull()) { |
| buffer->writeUInt(0); // instead of snugRB, signaling no pixels |
| return; |
| } |
| |
| SkPixmap result; |
| if (!bitmap.peekPixels(&result)) { |
| buffer->writeUInt(0); // instead of snugRB, signaling no pixels |
| return; |
| } |
| |
| write_raw_pixels(buffer, result); |
| } |
| |
| bool SkBitmap::ReadRawPixels(SkReadBuffer* buffer, SkBitmap* bitmap) { |
| const size_t snugRB = buffer->readUInt(); |
| if (0 == snugRB) { // no pixels |
| return false; |
| } |
| |
| SkImageInfo info; |
| info.unflatten(*buffer); |
| |
| if (info.width() < 0 || info.height() < 0) { |
| return false; |
| } |
| |
| // If there was an error reading "info" or if it is bogus, |
| // don't use it to compute minRowBytes() |
| if (!buffer->validate(SkColorTypeValidateAlphaType(info.colorType(), |
| info.alphaType()))) { |
| return false; |
| } |
| |
| const size_t ramRB = info.minRowBytes(); |
| const int height = SkMax32(info.height(), 0); |
| const uint64_t snugSize = sk_64_mul(snugRB, height); |
| const uint64_t ramSize = sk_64_mul(ramRB, height); |
| static const uint64_t max_size_t = (size_t)(-1); |
| if (!buffer->validate((snugSize <= ramSize) && (ramSize <= max_size_t))) { |
| return false; |
| } |
| |
| sk_sp<SkData> data(SkData::MakeUninitialized(SkToSizeT(ramSize))); |
| unsigned char* dst = (unsigned char*)data->writable_data(); |
| buffer->readByteArray(dst, SkToSizeT(snugSize)); |
| |
| if (snugSize != ramSize) { |
| const unsigned char* srcRow = dst + snugRB * (height - 1); |
| unsigned char* dstRow = dst + ramRB * (height - 1); |
| for (int y = height - 1; y >= 1; --y) { |
| memmove(dstRow, srcRow, snugRB); |
| srcRow -= snugRB; |
| dstRow -= ramRB; |
| } |
| SkASSERT(srcRow == dstRow); // first row does not need to be moved |
| } |
| |
| if (buffer->readBool()) { |
| sk_sp<SkColorTable> ctable = SkColorTable::Create(*buffer); |
| if (!ctable) { |
| return false; |
| } |
| |
| if (info.isEmpty()) { |
| // require an empty ctable |
| if (ctable->count() != 0) { |
| buffer->validate(false); |
| return false; |
| } |
| } else { |
| // require a non-empty ctable |
| if (ctable->count() == 0) { |
| buffer->validate(false); |
| return false; |
| } |
| unsigned char maxIndex = ctable->count() - 1; |
| for (uint64_t i = 0; i < ramSize; ++i) { |
| dst[i] = SkTMin(dst[i], maxIndex); |
| } |
| } |
| } |
| |
| sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeWithData(info, info.minRowBytes(), |
| std::move(data)); |
| if (!pr) { |
| return false; |
| } |
| bitmap->setInfo(info); |
| bitmap->setPixelRef(std::move(pr), 0, 0); |
| return true; |
| } |
| |
| enum { |
| SERIALIZE_PIXELTYPE_NONE, |
| SERIALIZE_PIXELTYPE_REF_DATA |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef SK_DEBUG |
| void SkBitmap::validate() const { |
| fInfo.validate(); |
| |
| // ImageInfo may not require this, but Bitmap ensures that opaque-only |
| // colorTypes report opaque for their alphatype |
| if (kRGB_565_SkColorType == fInfo.colorType()) { |
| SkASSERT(kOpaque_SkAlphaType == fInfo.alphaType()); |
| } |
| |
| SkASSERT(fInfo.validRowBytes(fRowBytes)); |
| uint8_t allFlags = kImageIsVolatile_Flag; |
| #ifdef SK_BUILD_FOR_ANDROID |
| allFlags |= kHasHardwareMipMap_Flag; |
| #endif |
| SkASSERT((~allFlags & fFlags) == 0); |
| |
| if (fPixelRef && fPixelRef->pixels()) { |
| SkASSERT(fPixels); |
| } else { |
| SkASSERT(!fPixels); |
| } |
| |
| if (fPixels) { |
| SkASSERT(fPixelRef); |
| SkASSERT(fPixelRef->rowBytes() == fRowBytes); |
| SkASSERT(fPixelRefOrigin.fX >= 0); |
| SkASSERT(fPixelRefOrigin.fY >= 0); |
| SkASSERT(fPixelRef->width() >= (int)this->width() + fPixelRefOrigin.fX); |
| SkASSERT(fPixelRef->height() >= (int)this->height() + fPixelRefOrigin.fY); |
| SkASSERT(fPixelRef->rowBytes() >= fInfo.minRowBytes()); |
| } |
| } |
| #endif |
| |
| #ifndef SK_IGNORE_TO_STRING |
| #include "SkString.h" |
| void SkBitmap::toString(SkString* str) const { |
| |
| static const char* gColorTypeNames[kLastEnum_SkColorType + 1] = { |
| "UNKNOWN", "A8", "565", "4444", "RGBA", "BGRA", "INDEX8", |
| }; |
| |
| str->appendf("bitmap: ((%d, %d) %s", this->width(), this->height(), |
| gColorTypeNames[this->colorType()]); |
| |
| str->append(" ("); |
| if (this->isOpaque()) { |
| str->append("opaque"); |
| } else { |
| str->append("transparent"); |
| } |
| if (this->isImmutable()) { |
| str->append(", immutable"); |
| } else { |
| str->append(", not-immutable"); |
| } |
| str->append(")"); |
| |
| str->appendf(" pixelref:%p", this->pixelRef()); |
| str->append(")"); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkBitmap::peekPixels(SkPixmap* pmap) const { |
| if (fPixels) { |
| if (pmap) { |
| pmap->reset(fInfo, fPixels, fRowBytes); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef SK_DEBUG |
| void SkImageInfo::validate() const { |
| SkASSERT(fWidth >= 0); |
| SkASSERT(fHeight >= 0); |
| SkASSERT(SkColorTypeIsValid(fColorType)); |
| SkASSERT(SkAlphaTypeIsValid(fAlphaType)); |
| } |
| #endif |
