static void emit_image_xobject(SkWStream* stream,
const SkImage* image,
bool alpha,
const sk_sp<SkPDFObject>& smask,
const SkPDFObjNumMap& objNumMap,
const SkPDFSubstituteMap& substitutes) {
SkBitmap bitmap;
image_get_ro_pixels(image, &bitmap); // TODO(halcanary): test
SkAutoLockPixels autoLockPixels(bitmap); // with malformed images.
// Write to a temporary buffer to get the compressed length.
SkDynamicMemoryWStream buffer;
SkDeflateWStream deflateWStream(&buffer);
if (alpha) {
bitmap_alpha_to_a8(bitmap, &deflateWStream);
} else {
bitmap_to_pdf_pixels(bitmap, &deflateWStream);
}
deflateWStream.finalize(); // call before detachAsStream().
std::unique_ptr<SkStreamAsset> asset(buffer.detachAsStream());
SkPDFDict pdfDict("XObject");
pdfDict.insertName("Subtype", "Image");
pdfDict.insertInt("Width", bitmap.width());
pdfDict.insertInt("Height", bitmap.height());
if (alpha) {
pdfDict.insertName("ColorSpace", "DeviceGray");
} else if (bitmap.colorType() == kIndex_8_SkColorType) {
SkASSERT(1 == pdf_color_component_count(bitmap.colorType()));
pdfDict.insertObject("ColorSpace",
make_indexed_color_space(bitmap.getColorTable(),
bitmap.alphaType()));
} else if (1 == pdf_color_component_count(bitmap.colorType())) {
pdfDict.insertName("ColorSpace", "DeviceGray");
} else {
pdfDict.insertName("ColorSpace", "DeviceRGB");
}
if (smask) {
pdfDict.insertObjRef("SMask", smask);
}
pdfDict.insertInt("BitsPerComponent", 8);
pdfDict.insertName("Filter", "FlateDecode");
pdfDict.insertInt("Length", asset->getLength());
pdfDict.emitObject(stream, objNumMap, substitutes);
pdf_stream_begin(stream);
stream->writeStream(asset.get(), asset->getLength());
pdf_stream_end(stream);
}
void PDFDefaultBitmap::emitObject(SkWStream* stream,
const SkPDFObjNumMap& objNumMap,
const SkPDFSubstituteMap& substitutes) const {
SkAutoLockPixels autoLockPixels(fBitmap);
SkASSERT(fBitmap.colorType() != kIndex_8_SkColorType ||
fBitmap.getColorTable());
// Write to a temporary buffer to get the compressed length.
SkDynamicMemoryWStream buffer;
SkDeflateWStream deflateWStream(&buffer);
bitmap_to_pdf_pixels(fBitmap, &deflateWStream);
deflateWStream.finalize(); // call before detachAsStream().
SkAutoTDelete<SkStreamAsset> asset(buffer.detachAsStream());
SkPDFDict pdfDict("XObject");
pdfDict.insertName("Subtype", "Image");
pdfDict.insertInt("Width", fBitmap.width());
pdfDict.insertInt("Height", fBitmap.height());
if (fBitmap.colorType() == kIndex_8_SkColorType) {
SkASSERT(1 == pdf_color_component_count(fBitmap.colorType()));
pdfDict.insertObject("ColorSpace",
make_indexed_color_space(fBitmap.getColorTable()));
} else if (1 == pdf_color_component_count(fBitmap.colorType())) {
pdfDict.insertName("ColorSpace", "DeviceGray");
} else {
pdfDict.insertName("ColorSpace", "DeviceRGB");
}
pdfDict.insertInt("BitsPerComponent", 8);
if (fSMask) {
pdfDict.insertObjRef("SMask", SkRef(fSMask.get()));
}
pdfDict.insertName("Filter", "FlateDecode");
pdfDict.insertInt("Length", asset->getLength());
pdfDict.emitObject(stream, objNumMap, substitutes);
pdf_stream_begin(stream);
stream->writeStream(asset.get(), asset->getLength());
pdf_stream_end(stream);
}