size_t SkImage::getDeferredTextureImageData(const GrContextThreadSafeProxy& proxy,
const DeferredTextureImageUsageParams params[],
int paramCnt, void* buffer,
SkColorSpace* dstColorSpace) const {
// Extract relevant min/max values from the params array.
int lowestPreScaleMipLevel = params[0].fPreScaleMipLevel;
SkFilterQuality highestFilterQuality = params[0].fQuality;
bool useMipMaps = should_use_mip_maps(params[0]);
for (int i = 1; i < paramCnt; ++i) {
if (lowestPreScaleMipLevel > params[i].fPreScaleMipLevel)
lowestPreScaleMipLevel = params[i].fPreScaleMipLevel;
if (highestFilterQuality < params[i].fQuality)
highestFilterQuality = params[i].fQuality;
useMipMaps |= should_use_mip_maps(params[i]);
}
const bool fillMode = SkToBool(buffer);
if (fillMode && !SkIsAlign8(reinterpret_cast<intptr_t>(buffer))) {
return 0;
}
// Calculate scaling parameters.
bool isScaled = lowestPreScaleMipLevel != 0;
SkISize scaledSize;
if (isScaled) {
// SkMipMap::ComputeLevelSize takes an index into an SkMipMap. SkMipMaps don't contain the
// base level, so to get an SkMipMap index we must subtract one from the GL MipMap level.
scaledSize = SkMipMap::ComputeLevelSize(this->width(), this->height(),
lowestPreScaleMipLevel - 1);
} else {
scaledSize = SkISize::Make(this->width(), this->height());
}
// We never want to scale at higher than SW medium quality, as SW medium matches GPU high.
SkFilterQuality scaleFilterQuality = highestFilterQuality;
if (scaleFilterQuality > kMedium_SkFilterQuality) {
scaleFilterQuality = kMedium_SkFilterQuality;
}
const int maxTextureSize = proxy.fCaps->maxTextureSize();
if (scaledSize.width() > maxTextureSize || scaledSize.height() > maxTextureSize) {
return 0;
}
SkAutoPixmapStorage pixmap;
SkImageInfo info;
size_t pixelSize = 0;
size_t ctSize = 0;
int ctCount = 0;
if (!isScaled && this->peekPixels(&pixmap)) {
info = pixmap.info();
pixelSize = SkAlign8(pixmap.getSafeSize());
if (pixmap.ctable()) {
ctCount = pixmap.ctable()->count();
ctSize = SkAlign8(pixmap.ctable()->count() * 4);
}
} else {
// Here we're just using presence of data to know whether there is a codec behind the image.
// In the future we will access the cacherator and get the exact data that we want to (e.g.
// yuv planes) upload.
sk_sp<SkData> data(this->refEncoded());
if (!data && !this->peekPixels(nullptr)) {
return 0;
}
info = as_IB(this)->onImageInfo().makeWH(scaledSize.width(), scaledSize.height());
pixelSize = SkAlign8(SkAutoPixmapStorage::AllocSize(info, nullptr));
if (fillMode) {
pixmap.alloc(info);
if (isScaled) {
if (!this->scalePixels(pixmap, scaleFilterQuality,
SkImage::kDisallow_CachingHint)) {
return 0;
}
} else {
if (!this->readPixels(pixmap, 0, 0, SkImage::kDisallow_CachingHint)) {
return 0;
}
}
SkASSERT(!pixmap.ctable());
}
}
int mipMapLevelCount = 1;
if (useMipMaps) {
// SkMipMap only deals with the mipmap levels it generates, which does
// not include the base level.
// That means it generates and holds levels 1-x instead of 0-x.
// So the total mipmap level count is 1 more than what
// SkMipMap::ComputeLevelCount returns.
mipMapLevelCount = SkMipMap::ComputeLevelCount(scaledSize.width(), scaledSize.height()) + 1;
// We already initialized pixelSize to the size of the base level.
// SkMipMap will generate the extra mipmap levels. Their sizes need to
// be added to the total.
// Index 0 here does not refer to the base mipmap level -- it is
// SkMipMap's first generated mipmap level (level 1).
for (int currentMipMapLevelIndex = mipMapLevelCount - 2; currentMipMapLevelIndex >= 0;
currentMipMapLevelIndex--) {
SkISize mipSize = SkMipMap::ComputeLevelSize(scaledSize.width(), scaledSize.height(),
currentMipMapLevelIndex);
SkImageInfo mipInfo = info.makeWH(mipSize.fWidth, mipSize.fHeight);
pixelSize += SkAlign8(SkAutoPixmapStorage::AllocSize(mipInfo, nullptr));
}
}
size_t size = 0;
size_t dtiSize = SkAlign8(sizeof(DeferredTextureImage));
size += dtiSize;
size += (mipMapLevelCount - 1) * sizeof(MipMapLevelData);
// We subtract 1 because DeferredTextureImage already includes the base
// level in its size
size_t pixelOffset = size;
size += pixelSize;
size_t ctOffset = size;
size += ctSize;
size_t colorSpaceOffset = 0;
size_t colorSpaceSize = 0;
if (info.colorSpace()) {
colorSpaceOffset = size;
colorSpaceSize = info.colorSpace()->writeToMemory(nullptr);
size += colorSpaceSize;
}
if (!fillMode) {
return size;
}
char* bufferAsCharPtr = reinterpret_cast<char*>(buffer);
char* pixelsAsCharPtr = bufferAsCharPtr + pixelOffset;
void* pixels = pixelsAsCharPtr;
void* ct = nullptr;
if (ctSize) {
ct = bufferAsCharPtr + ctOffset;
}
memcpy(reinterpret_cast<void*>(SkAlign8(reinterpret_cast<uintptr_t>(pixelsAsCharPtr))),
pixmap.addr(), pixmap.getSafeSize());
if (ctSize) {
memcpy(ct, pixmap.ctable()->readColors(), ctSize);
}
// If the context has sRGB support, and we're intending to render to a surface with an attached
// color space, and the image has an sRGB-like color space attached, then use our gamma (sRGB)
// aware mip-mapping.
SkSourceGammaTreatment gammaTreatment = SkSourceGammaTreatment::kIgnore;
if (proxy.fCaps->srgbSupport() && SkToBool(dstColorSpace) &&
info.colorSpace() && info.colorSpace()->gammaCloseToSRGB()) {
gammaTreatment = SkSourceGammaTreatment::kRespect;
}
SkASSERT(info == pixmap.info());
size_t rowBytes = pixmap.rowBytes();
static_assert(std::is_standard_layout<DeferredTextureImage>::value,
"offsetof, which we use below, requires the type have standard layout");
auto dtiBufferFiller = DTIBufferFiller{bufferAsCharPtr};
FILL_MEMBER(dtiBufferFiller, fGammaTreatment, &gammaTreatment);
FILL_MEMBER(dtiBufferFiller, fContextUniqueID, &proxy.fContextUniqueID);
int width = info.width();
FILL_MEMBER(dtiBufferFiller, fWidth, &width);
int height = info.height();
FILL_MEMBER(dtiBufferFiller, fHeight, &height);
SkColorType colorType = info.colorType();
FILL_MEMBER(dtiBufferFiller, fColorType, &colorType);
SkAlphaType alphaType = info.alphaType();
FILL_MEMBER(dtiBufferFiller, fAlphaType, &alphaType);
FILL_MEMBER(dtiBufferFiller, fColorTableCnt, &ctCount);
FILL_MEMBER(dtiBufferFiller, fColorTableData, &ct);
FILL_MEMBER(dtiBufferFiller, fMipMapLevelCount, &mipMapLevelCount);
memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData[0].fPixelData),
&pixels, sizeof(pixels));
memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData[0].fRowBytes),
&rowBytes, sizeof(rowBytes));
if (colorSpaceSize) {
void* colorSpace = bufferAsCharPtr + colorSpaceOffset;
FILL_MEMBER(dtiBufferFiller, fColorSpace, &colorSpace);
FILL_MEMBER(dtiBufferFiller, fColorSpaceSize, &colorSpaceSize);
info.colorSpace()->writeToMemory(bufferAsCharPtr + colorSpaceOffset);
} else {
memset(bufferAsCharPtr + offsetof(DeferredTextureImage, fColorSpace),
0, sizeof(DeferredTextureImage::fColorSpace));
memset(bufferAsCharPtr + offsetof(DeferredTextureImage, fColorSpaceSize),
0, sizeof(DeferredTextureImage::fColorSpaceSize));
}
// Fill in the mipmap levels if they exist
char* mipLevelPtr = pixelsAsCharPtr + SkAlign8(pixmap.getSafeSize());
if (useMipMaps) {
static_assert(std::is_standard_layout<MipMapLevelData>::value,
"offsetof, which we use below, requires the type have a standard layout");
SkAutoTDelete<SkMipMap> mipmaps(SkMipMap::Build(pixmap, gammaTreatment, nullptr));
// SkMipMap holds only the mipmap levels it generates.
// A programmer can use the data they provided to SkMipMap::Build as level 0.
// So the SkMipMap provides levels 1-x but it stores them in its own
// range 0-(x-1).
for (int generatedMipLevelIndex = 0; generatedMipLevelIndex < mipMapLevelCount - 1;
generatedMipLevelIndex++) {
SkMipMap::Level mipLevel;
mipmaps->getLevel(generatedMipLevelIndex, &mipLevel);
// Make sure the mipmap data is after the start of the buffer
SkASSERT(mipLevelPtr > bufferAsCharPtr);
// Make sure the mipmap data starts before the end of the buffer
SkASSERT(mipLevelPtr < bufferAsCharPtr + pixelOffset + pixelSize);
// Make sure the mipmap data ends before the end of the buffer
SkASSERT(mipLevelPtr + mipLevel.fPixmap.getSafeSize() <=
bufferAsCharPtr + pixelOffset + pixelSize);
// getSafeSize includes rowbyte padding except for the last row,
// right?
memcpy(mipLevelPtr, mipLevel.fPixmap.addr(), mipLevel.fPixmap.getSafeSize());
memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData) +
sizeof(MipMapLevelData) * (generatedMipLevelIndex + 1) +
offsetof(MipMapLevelData, fPixelData), &mipLevelPtr, sizeof(void*));
size_t rowBytes = mipLevel.fPixmap.rowBytes();
memcpy(bufferAsCharPtr + offsetof(DeferredTextureImage, fMipMapLevelData) +
sizeof(MipMapLevelData) * (generatedMipLevelIndex + 1) +
offsetof(MipMapLevelData, fRowBytes), &rowBytes, sizeof(rowBytes));
mipLevelPtr += SkAlign8(mipLevel.fPixmap.getSafeSize());
}
}
return size;
}
static int perspective_run(const FilterActivation *fa, const FilterFunctions *ff) {
PerspectiveFilterData *mfd = (PerspectiveFilterData *)fa->filter_data;
VDPixmap pxsrc = {0};
VDPixmap pxdst = {0};
pxsrc.data = (char *)fa->src.data + fa->src.pitch * (fa->src.h-1);
pxsrc.pitch = -fa->src.pitch;
pxsrc.format = nsVDPixmap::kPixFormat_XRGB8888;
pxsrc.w = fa->src.w;
pxsrc.h = fa->src.h;
pxdst.data = (char *)fa->dst.data + fa->dst.pitch * (fa->dst.h-1);
pxdst.pitch = -fa->dst.pitch;
pxdst.format = nsVDPixmap::kPixFormat_XRGB8888;
pxdst.w = fa->dst.w;
pxdst.h = fa->dst.h;
VDPixmapTextureMipmapChain mipmaps(pxsrc, false, mfd->filtermode ? 16 : 1);
VDTriBltVertex trivx[8]={
{ -1, -1, 0, 0, 0 },
{ +1, -1, 0, (float)pxsrc.w, 0 },
{ +1, +1, 0, (float)pxsrc.w, (float)pxsrc.h },
{ -1, +1, 0, 0, (float)pxsrc.h },
};
static const int indices[6]={0,1,2,0,2,3};
vdfloat3x3 temp(MapQuadToUnitSquare(mfd->src));
if (!mfd->unproject)
temp = ~temp;
vdfloat4x4 mx;
mx[0][0] = temp[0][0];
mx[0][1] = temp[0][1];
mx[0][2] = 0;
mx[0][3] = temp[0][2];
mx[1][0] = temp[1][0];
mx[1][1] = temp[1][1];
mx[1][2] = 0;
mx[1][3] = temp[1][2];
mx[2][0] = 0;
mx[2][1] = 0;
mx[2][3] = 0;
mx[2][2] = 0;
mx[3][0] = temp[2][0];
mx[3][1] = temp[2][1];
mx[3][2] = 0;
mx[3][3] = temp[2][2];
// manually transform corners and form fill mesh
for(int i=0; i<4; ++i) {
vdfloat3 xfv((mx*vdfloat4c(trivx[i].x, trivx[i].y, trivx[i].z, 1.0f)).project());
trivx[i+4].x = xfv[0];
trivx[i+4].y = xfv[1];
trivx[i+4].z = xfv[2];
}
static const int fillmesh[24]={
0,1,5,5,4,0,
1,2,6,6,5,1,
2,3,7,7,6,2,
3,0,4,4,7,3
};
VDPixmapTriFill(pxdst, 0, trivx, 8, fillmesh, 24, NULL);
// texture image
VDPixmapTriBlt(pxdst, mipmaps.Mips(), mipmaps.Levels(), trivx, 4, indices, 6, (VDTriBltFilterMode)mfd->filtermode, true, mx.data());
return 0;
}
