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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkImage_Base.h"
#include "SkBitmap.h"
#include "SkBitmapProcShader.h"
#include "SkCanvas.h"
#include "SkColorSpaceXform_Base.h"
#include "SkColorSpaceXformImageGenerator.h"
#include "SkColorSpaceXformPriv.h"
#include "SkColorTable.h"
#include "SkData.h"
#include "SkImageInfoPriv.h"
#include "SkImagePriv.h"
#include "SkPixelRef.h"
#include "SkSurface.h"
#include "SkTLazy.h"
#include "SkUnPreMultiplyPriv.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrTextureAdjuster.h"
#include "SkGr.h"
#endif
// fixes https://bug.skia.org/5096
static bool is_not_subset(const SkBitmap& bm) {
SkASSERT(bm.pixelRef());
SkISize dim = SkISize::Make(bm.pixelRef()->width(), bm.pixelRef()->height());
SkASSERT(dim != bm.dimensions() || bm.pixelRefOrigin().isZero());
return dim == bm.dimensions();
}
class SkImage_Raster : public SkImage_Base {
public:
static bool ValidArgs(const Info& info, size_t rowBytes, size_t* minSize) {
const int maxDimension = SK_MaxS32 >> 2;
if (info.width() <= 0 || info.height() <= 0) {
return false;
}
if (info.width() > maxDimension || info.height() > maxDimension) {
return false;
}
if ((unsigned)info.colorType() > (unsigned)kLastEnum_SkColorType) {
return false;
}
if ((unsigned)info.alphaType() > (unsigned)kLastEnum_SkAlphaType) {
return false;
}
if (kUnknown_SkColorType == info.colorType()) {
return false;
}
if (rowBytes < info.minRowBytes()) {
return false;
}
size_t size = info.getSafeSize(rowBytes);
if (0 == size) {
return false;
}
if (minSize) {
*minSize = size;
}
return true;
}
SkImage_Raster(const SkImageInfo&, sk_sp<SkData>, size_t rb,
uint32_t id = kNeedNewImageUniqueID);
~SkImage_Raster() override;
SkImageInfo onImageInfo() const override {
return fBitmap.info();
}
SkAlphaType onAlphaType() const override {
return fBitmap.alphaType();
}
bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY, CachingHint) const override;
bool onPeekPixels(SkPixmap*) const override;
const SkBitmap* onPeekBitmap() const override { return &fBitmap; }
#if SK_SUPPORT_GPU
sk_sp<GrTextureProxy> asTextureProxyRef(GrContext*, const GrSamplerParams&,
SkColorSpace*, sk_sp<SkColorSpace>*,
SkScalar scaleAdjust[2]) const override;
#endif
bool getROPixels(SkBitmap*, SkColorSpace* dstColorSpace, CachingHint) const override;
sk_sp<SkImage> onMakeSubset(const SkIRect&) const override;
SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); }
bool onAsLegacyBitmap(SkBitmap*, LegacyBitmapMode) const override;
SkImage_Raster(const SkBitmap& bm, bool bitmapMayBeMutable = false)
: INHERITED(bm.width(), bm.height(),
is_not_subset(bm) ? bm.getGenerationID()
: (uint32_t)kNeedNewImageUniqueID)
, fBitmap(bm)
{
SkASSERT(bitmapMayBeMutable || fBitmap.isImmutable());
}
sk_sp<SkImage> onMakeColorSpace(sk_sp<SkColorSpace>, SkColorType,
SkTransferFunctionBehavior) const override;
bool onIsValid(GrContext* context) const override { return true; }
#if SK_SUPPORT_GPU
sk_sp<GrTextureProxy> refPinnedTextureProxy(uint32_t* uniqueID) const override;
bool onPinAsTexture(GrContext*) const override;
void onUnpinAsTexture(GrContext*) const override;
#endif
private:
SkBitmap fBitmap;
#if SK_SUPPORT_GPU
mutable sk_sp<GrTextureProxy> fPinnedProxy;
mutable int32_t fPinnedCount = 0;
mutable uint32_t fPinnedUniqueID = 0;
#endif
typedef SkImage_Base INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static void release_data(void* addr, void* context) {
SkData* data = static_cast<SkData*>(context);
data->unref();
}
SkImage_Raster::SkImage_Raster(const Info& info, sk_sp<SkData> data, size_t rowBytes, uint32_t id)
: INHERITED(info.width(), info.height(), id)
{
void* addr = const_cast<void*>(data->data());
fBitmap.installPixels(info, addr, rowBytes, release_data, data.release());
fBitmap.setImmutable();
}
SkImage_Raster::~SkImage_Raster() {
#if SK_SUPPORT_GPU
SkASSERT(nullptr == fPinnedProxy.get()); // want the caller to have manually unpinned
#endif
}
bool SkImage_Raster::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
int srcX, int srcY, CachingHint) const {
SkBitmap shallowCopy(fBitmap);
return shallowCopy.readPixels(dstInfo, dstPixels, dstRowBytes, srcX, srcY);
}
bool SkImage_Raster::onPeekPixels(SkPixmap* pm) const {
return fBitmap.peekPixels(pm);
}
bool SkImage_Raster::getROPixels(SkBitmap* dst, SkColorSpace* dstColorSpace, CachingHint) const {
*dst = fBitmap;
return true;
}
#if SK_SUPPORT_GPU
sk_sp<GrTextureProxy> SkImage_Raster::asTextureProxyRef(GrContext* context,
const GrSamplerParams& params,
SkColorSpace* dstColorSpace,
sk_sp<SkColorSpace>* texColorSpace,
SkScalar scaleAdjust[2]) const {
if (!context) {
return nullptr;
}
if (texColorSpace) {
*texColorSpace = sk_ref_sp(fBitmap.colorSpace());
}
uint32_t uniqueID;
sk_sp<GrTextureProxy> tex = this->refPinnedTextureProxy(&uniqueID);
if (tex) {
GrTextureAdjuster adjuster(context, fPinnedProxy,
fBitmap.alphaType(), fBitmap.bounds(),
fPinnedUniqueID, fBitmap.colorSpace());
return adjuster.refTextureProxySafeForParams(params, nullptr, scaleAdjust);
}
return GrRefCachedBitmapTextureProxy(context, fBitmap, params, scaleAdjust);
}
#endif
#if SK_SUPPORT_GPU
sk_sp<GrTextureProxy> SkImage_Raster::refPinnedTextureProxy(uint32_t* uniqueID) const {
if (fPinnedProxy) {
SkASSERT(fPinnedCount > 0);
SkASSERT(fPinnedUniqueID != 0);
*uniqueID = fPinnedUniqueID;
return fPinnedProxy;
}
return nullptr;
}
bool SkImage_Raster::onPinAsTexture(GrContext* ctx) const {
if (fPinnedProxy) {
SkASSERT(fPinnedCount > 0);
SkASSERT(fPinnedUniqueID != 0);
} else {
SkASSERT(fPinnedCount == 0);
SkASSERT(fPinnedUniqueID == 0);
fPinnedProxy = GrRefCachedBitmapTextureProxy(ctx, fBitmap,
GrSamplerParams::ClampNoFilter(), nullptr);
if (!fPinnedProxy) {
return false;
}
fPinnedUniqueID = fBitmap.getGenerationID();
}
// Note: we only increment if the texture was successfully pinned
++fPinnedCount;
return true;
}
void SkImage_Raster::onUnpinAsTexture(GrContext* ctx) const {
// Note: we always decrement, even if fPinnedTexture is null
SkASSERT(fPinnedCount > 0);
SkASSERT(fPinnedUniqueID != 0);
if (0 == --fPinnedCount) {
fPinnedProxy.reset(nullptr);
fPinnedUniqueID = 0;
}
}
#endif
sk_sp<SkImage> SkImage_Raster::onMakeSubset(const SkIRect& subset) const {
// TODO : could consider heurist of sharing pixels, if subset is pretty close to complete
SkImageInfo info = SkImageInfo::MakeN32(subset.width(), subset.height(), fBitmap.alphaType());
auto surface(SkSurface::MakeRaster(info));
if (!surface) {
return nullptr;
}
surface->getCanvas()->clear(0);
surface->getCanvas()->drawImage(this, SkIntToScalar(-subset.x()), SkIntToScalar(-subset.y()),
nullptr);
return surface->makeImageSnapshot();
}
///////////////////////////////////////////////////////////////////////////////
sk_sp<SkImage> MakeRasterCopyPriv(const SkPixmap& pmap, uint32_t id) {
size_t size;
if (!SkImage_Raster::ValidArgs(pmap.info(), pmap.rowBytes(), &size) || !pmap.addr()) {
return nullptr;
}
// Here we actually make a copy of the caller's pixel data
sk_sp<SkData> data(SkData::MakeWithCopy(pmap.addr(), size));
return sk_make_sp<SkImage_Raster>(pmap.info(), std::move(data), pmap.rowBytes(), id);
}
sk_sp<SkImage> SkImage::MakeRasterCopy(const SkPixmap& pmap) {
return MakeRasterCopyPriv(pmap, kNeedNewImageUniqueID);
}
sk_sp<SkImage> SkImage::MakeRasterData(const SkImageInfo& info, sk_sp<SkData> data,
size_t rowBytes) {
size_t size;
if (!SkImage_Raster::ValidArgs(info, rowBytes, &size) || !data) {
return nullptr;
}
// did they give us enough data?
if (data->size() < size) {
return nullptr;
}
return sk_make_sp<SkImage_Raster>(info, std::move(data), rowBytes);
}
sk_sp<SkImage> SkImage::MakeFromRaster(const SkPixmap& pmap, RasterReleaseProc proc,
ReleaseContext ctx) {
size_t size;
if (!SkImage_Raster::ValidArgs(pmap.info(), pmap.rowBytes(), &size) || !pmap.addr()) {
return nullptr;
}
sk_sp<SkData> data(SkData::MakeWithProc(pmap.addr(), size, proc, ctx));
return sk_make_sp<SkImage_Raster>(pmap.info(), std::move(data), pmap.rowBytes());
}
sk_sp<SkImage> SkMakeImageFromRasterBitmapPriv(const SkBitmap& bm, SkCopyPixelsMode cpm,
uint32_t idForCopy) {
if (kAlways_SkCopyPixelsMode == cpm || (!bm.isImmutable() && kNever_SkCopyPixelsMode != cpm)) {
SkPixmap pmap;
if (bm.peekPixels(&pmap)) {
return MakeRasterCopyPriv(pmap, idForCopy);
} else {
return sk_sp<SkImage>();
}
}
return sk_make_sp<SkImage_Raster>(bm, kNever_SkCopyPixelsMode == cpm);
}
sk_sp<SkImage> SkMakeImageFromRasterBitmap(const SkBitmap& bm, SkCopyPixelsMode cpm) {
if (!SkImageInfoIsValidAllowNumericalCS(bm.info()) || bm.rowBytes() < bm.info().minRowBytes()) {
return nullptr;
}
return SkMakeImageFromRasterBitmapPriv(bm, cpm, kNeedNewImageUniqueID);
}
sk_sp<SkImage> SkMakeImageInColorSpace(const SkBitmap& bm, sk_sp<SkColorSpace> dstCS, uint32_t id,
SkCopyPixelsMode cpm) {
if (!SkImageInfoIsValidAllowNumericalCS(bm.info()) || !bm.getPixels() ||
bm.rowBytes() < bm.info().minRowBytes() || !dstCS) {
return nullptr;
}
sk_sp<SkColorSpace> srcCS = bm.info().refColorSpace();
if (!srcCS) {
// Treat nullptr as sRGB.
srcCS = SkColorSpace::MakeSRGB();
}
sk_sp<SkImage> image = nullptr;
// For the Android use case, this is very likely to be true.
if (SkColorSpace::Equals(srcCS.get(), dstCS.get())) {
SkASSERT(kNeedNewImageUniqueID == id || bm.getGenerationID() == id);
image = SkMakeImageFromRasterBitmapPriv(bm, cpm, id);
} else {
image = SkImage::MakeFromGenerator(SkColorSpaceXformImageGenerator::Make(bm, dstCS, cpm,
id));
}
// If the caller suplied an id, we must propagate that to the image we return
SkASSERT(kNeedNewImageUniqueID == id || image->uniqueID() == id);
return image;
}
const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* image) {
return ((const SkImage_Raster*)image)->getPixelRef();
}
bool SkImage_Raster::onAsLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
if (kRO_LegacyBitmapMode == mode) {
// When we're a snapshot from a surface, our bitmap may not be marked immutable
// even though logically always we are, but in that case we can't physically share our
// pixelref since the caller might call setImmutable() themselves
// (thus changing our state).
if (fBitmap.isImmutable()) {
bitmap->setInfo(fBitmap.info(), fBitmap.rowBytes());
bitmap->setPixelRef(sk_ref_sp(fBitmap.pixelRef()),
fBitmap.pixelRefOrigin().x(),
fBitmap.pixelRefOrigin().y());
return true;
}
}
return this->INHERITED::onAsLegacyBitmap(bitmap, mode);
}
///////////////////////////////////////////////////////////////////////////////
sk_sp<SkImage> SkImage_Raster::onMakeColorSpace(sk_sp<SkColorSpace> target,
SkColorType targetColorType,
SkTransferFunctionBehavior premulBehavior) const {
SkPixmap src;
SkAssertResult(fBitmap.peekPixels(&src));
// Treat nullptr srcs as sRGB.
if (!src.colorSpace()) {
if (target->isSRGB()) {
return sk_ref_sp(const_cast<SkImage*>((SkImage*)this));
}
src.setColorSpace(SkColorSpace::MakeSRGB());
}
SkImageInfo dstInfo = fBitmap.info().makeColorType(targetColorType).makeColorSpace(target);
SkBitmap dst;
dst.allocPixels(dstInfo);
SkAssertResult(dst.writePixels(src, 0, 0, premulBehavior));
dst.setImmutable();
return SkImage::MakeFromBitmap(dst);
}