static SkStream* extract_argb8888_data(const SkBitmap& bitmap,
const SkIRect& srcRect,
bool extractAlpha,
bool* isOpaque,
bool* isTransparent) {
size_t streamSize = extractAlpha ? srcRect.width() * srcRect.height()
: get_uncompressed_size(bitmap, srcRect);
SkStream* stream = SkNEW_ARGS(SkMemoryStream, (streamSize));
uint8_t* dst = (uint8_t*)stream->getMemoryBase();
const SkUnPreMultiply::Scale* scaleTable = SkUnPreMultiply::GetScaleTable();
for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
uint32_t* src = bitmap.getAddr32(0, y);
for (int x = srcRect.fLeft; x < srcRect.fRight; x++) {
SkPMColor c = src[x];
U8CPU alpha = SkGetPackedA32(c);
if (extractAlpha) {
*isOpaque &= alpha == SK_AlphaOPAQUE;
*isTransparent &= alpha == SK_AlphaTRANSPARENT;
*dst++ = alpha;
} else {
if (SK_AlphaTRANSPARENT == alpha) {
// It is necessary to average the color component of
// transparent pixels with their surrounding neighbors
// since the PDF renderer may separately re-sample the
// alpha and color channels when the image is not
// displayed at its native resolution. Since an alpha of
// zero gives no information about the color component,
// the pathological case is a white image with sharp
// transparency bounds - the color channel goes to black,
// and the should-be-transparent pixels are rendered
// as grey because of the separate soft mask and color
// resizing.
c = get_argb8888_neighbor_avg_color(bitmap, x, y);
*dst++ = SkGetPackedR32(c);
*dst++ = SkGetPackedG32(c);
*dst++ = SkGetPackedB32(c);
} else {
SkUnPreMultiply::Scale s = scaleTable[alpha];
*dst++ = SkUnPreMultiply::ApplyScale(s, SkGetPackedR32(c));
*dst++ = SkUnPreMultiply::ApplyScale(s, SkGetPackedG32(c));
*dst++ = SkUnPreMultiply::ApplyScale(s, SkGetPackedB32(c));
}
}
}
}
SkASSERT(dst == streamSize + (uint8_t*)stream->getMemoryBase());
return stream;
}
/* make a deep copy of the asset, and return it as a stream, or NULL if there
was an error.
*/
SkStream*
BitmapFactoryGlue::copyAssetToStream(Asset& asset)
{
// if we could "ref/reopen" the asset, we may not need to copy it here
off64_t size = asset.seek(0, SEEK_SET);
if ((off64_t)-1 == size) {
SkDebugf("---- copyAsset: asset rewind failed\n");
return NULL;
}
size = asset.getLength();
if (size <= 0) {
SkDebugf("---- copyAsset: asset->getLength() returned %d\n", size);
return NULL;
}
SkStream* stream = new SkMemoryStream(size);
void* data = const_cast<void*>(stream->getMemoryBase());
off64_t len = asset.read(data, size);
if (len != size) {
SkDebugf("---- copyAsset: asset->read(%d) returned %d\n", size, len);
delete stream;
stream = NULL;
}
return stream;
}
static void delete_stream_proc(void* info, const void* addr, size_t size) {
SkASSERT(info);
SkStream* stream = (SkStream*)info;
SkASSERT(stream->getMemoryBase() == addr);
SkASSERT(stream->getLength() == size);
SkDELETE(stream);
}
static SkStream* extract_argb8888_data(const SkBitmap& bitmap,
const SkIRect& srcRect,
bool extractAlpha,
bool* isOpaque,
bool* isTransparent) {
SkStream* stream;
if (extractAlpha) {
stream = SkNEW_ARGS(SkMemoryStream,
(srcRect.width() * srcRect.height()));
} else {
stream = SkNEW_ARGS(SkMemoryStream,
(get_uncompressed_size(bitmap, srcRect)));
}
uint8_t* dst = (uint8_t*)stream->getMemoryBase();
for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
uint32_t* src = bitmap.getAddr32(0, y);
for (int x = srcRect.fLeft; x < srcRect.fRight; x++) {
if (extractAlpha) {
dst[0] = SkGetPackedA32(src[x]);
*isOpaque &= dst[0] == SK_AlphaOPAQUE;
*isTransparent &= dst[0] == SK_AlphaTRANSPARENT;
dst++;
} else {
dst[0] = SkGetPackedR32(src[x]);
dst[1] = SkGetPackedG32(src[x]);
dst[2] = SkGetPackedB32(src[x]);
dst += 3;
}
}
}
return stream;
}
static SkStream* extract_argb4444_data(const SkBitmap& bitmap,
const SkIRect& srcRect,
bool extractAlpha,
bool* isOpaque,
bool* isTransparent) {
SkStream* stream;
uint8_t* dst = NULL;
if (extractAlpha) {
const int alphaRowBytes = (srcRect.width() + 1) / 2;
stream = SkNEW_ARGS(SkMemoryStream,
(alphaRowBytes * srcRect.height()));
} else {
stream = SkNEW_ARGS(SkMemoryStream,
(get_uncompressed_size(bitmap, srcRect)));
}
dst = (uint8_t*)stream->getMemoryBase();
for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
uint16_t* src = bitmap.getAddr16(0, y);
int x;
for (x = srcRect.fLeft; x + 1 < srcRect.fRight; x += 2) {
if (extractAlpha) {
dst[0] = (SkGetPackedA4444(src[x]) << 4) |
SkGetPackedA4444(src[x + 1]);
*isOpaque &= dst[0] == SK_AlphaOPAQUE;
*isTransparent &= dst[0] == SK_AlphaTRANSPARENT;
dst++;
} else {
dst[0] = (SkGetPackedR4444(src[x]) << 4) |
SkGetPackedG4444(src[x]);
dst[1] = (SkGetPackedB4444(src[x]) << 4) |
SkGetPackedR4444(src[x + 1]);
dst[2] = (SkGetPackedG4444(src[x + 1]) << 4) |
SkGetPackedB4444(src[x + 1]);
dst += 3;
}
}
if (srcRect.width() & 1) {
if (extractAlpha) {
dst[0] = (SkGetPackedA4444(src[x]) << 4);
*isOpaque &= dst[0] == (SK_AlphaOPAQUE & 0xF0);
*isTransparent &= dst[0] == (SK_AlphaTRANSPARENT & 0xF0);
dst++;
} else {
dst[0] = (SkGetPackedR4444(src[x]) << 4) |
SkGetPackedG4444(src[x]);
dst[1] = (SkGetPackedB4444(src[x]) << 4);
dst += 2;
}
}
}
return stream;
}
// Will return 0 on failure
static SkFaceRec* ref_ft_face(uint32_t fontID) {
SkFaceRec* rec = gFaceRecHead;
while (rec) {
if (rec->fFontID == fontID) {
SkASSERT(rec->fFace);
rec->fRefCnt += 1;
return rec;
}
rec = rec->fNext;
}
SkStream* strm = SkFontHost::OpenStream(fontID);
if (NULL == strm) {
SkDEBUGF(("SkFontHost::OpenStream failed opening %x\n", fontID));
return 0;
}
// this passes ownership of strm to the rec
rec = SkNEW_ARGS(SkFaceRec, (strm, fontID));
FT_Open_Args args;
memset(&args, 0, sizeof(args));
const void* memoryBase = strm->getMemoryBase();
if (NULL != memoryBase) {
//printf("mmap(%s)\n", keyString.c_str());
args.flags = FT_OPEN_MEMORY;
args.memory_base = (const FT_Byte*)memoryBase;
args.memory_size = strm->getLength();
} else {
//printf("fopen(%s)\n", keyString.c_str());
args.flags = FT_OPEN_STREAM;
args.stream = &rec->fFTStream;
}
int face_index;
int length = SkFontHost::GetFileName(fontID, NULL, 0, &face_index);
FT_Error err = FT_Open_Face(gFTLibrary, &args, length ? face_index : 0,
&rec->fFace);
if (err) { // bad filename, try the default font
fprintf(stderr, "ERROR: unable to open font '%x'\n", fontID);
SkDELETE(rec);
return 0;
} else {
SkASSERT(rec->fFace);
//fprintf(stderr, "Opened font '%s'\n", filename.c_str());
rec->fNext = gFaceRecHead;
gFaceRecHead = rec;
rec->fRefCnt = 1;
return rec;
}
}
static SkStream* extract_index8_image(const SkBitmap& bitmap,
const SkIRect& srcRect) {
const int rowBytes = srcRect.width();
SkStream* stream = SkNEW_ARGS(SkMemoryStream,
(get_uncompressed_size(bitmap, srcRect)));
uint8_t* dst = (uint8_t*)stream->getMemoryBase();
for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
memcpy(dst, bitmap.getAddr8(srcRect.fLeft, y), rowBytes);
dst += rowBytes;
}
return stream;
}
static SkStream* extract_gray8_image(const SkBitmap& bitmap, const SkIRect& srcRect) {
SkStream* stream = SkNEW_ARGS(SkMemoryStream,
(get_uncompressed_size(bitmap, srcRect)));
uint8_t* dst = (uint8_t*)stream->getMemoryBase();
for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
uint8_t* src = bitmap.getAddr8(0, y);
for (int x = srcRect.fLeft; x < srcRect.fRight; x++) {
dst[0] = dst[1] = dst[2] = src[x];
dst += 3;
}
}
return stream;
}
static SkStream* extract_a8_alpha(const SkBitmap& bitmap,
const SkIRect& srcRect,
bool* isOpaque,
bool* isTransparent) {
const int alphaRowBytes = srcRect.width();
SkStream* stream = SkNEW_ARGS(SkMemoryStream,
(alphaRowBytes * srcRect.height()));
uint8_t* alphaDst = (uint8_t*)stream->getMemoryBase();
for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
uint8_t* src = bitmap.getAddr8(0, y);
for (int x = srcRect.fLeft; x < srcRect.fRight; x++) {
alphaDst[0] = src[x];
*isOpaque &= alphaDst[0] == SK_AlphaOPAQUE;
*isTransparent &= alphaDst[0] == SK_AlphaTRANSPARENT;
alphaDst++;
}
}
return stream;
}
SkStream* FontConfigTypeface::onOpenStream(int* ttcIndex) const {
SkStream* stream = this->getLocalStream();
if (stream) {
// should have been provided by CreateFromStream()
*ttcIndex = 0;
SkAutoTUnref<SkStream> dupStream(stream->duplicate());
if (dupStream) {
return dupStream.detach();
}
// TODO: update interface use, remove the following code in this block.
size_t length = stream->getLength();
const void* memory = stream->getMemoryBase();
if (NULL != memory) {
return new SkMemoryStream(memory, length, true);
}
SkAutoTMalloc<uint8_t> allocMemory(length);
stream->rewind();
if (length == stream->read(allocMemory.get(), length)) {
SkAutoTUnref<SkMemoryStream> copyStream(new SkMemoryStream());
copyStream->setMemoryOwned(allocMemory.detach(), length);
return copyStream.detach();
}
stream->rewind();
stream->ref();
} else {
SkAutoTUnref<SkFontConfigInterface> fci(RefFCI());
if (NULL == fci.get()) {
return NULL;
}
stream = fci->openStream(this->getIdentity());
*ttcIndex = this->getIdentity().fTTCIndex;
}
return stream;
}
static SkStream* create_black_image() {
SkStream* stream = SkNEW_ARGS(SkMemoryStream, (1));
((uint8_t*)stream->getMemoryBase())[0] = 0;
return stream;
}