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Add support for bit depth with raw input and output (#2762)

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* Determine input raw pixel depth from the given typed array
* Allow pixel depth to be set on raw output
This commit is contained in:
Mart
2021-08-03 15:52:54 +02:00
committed by GitHub
parent eabb671b10
commit b7add480c7
9 changed files with 123 additions and 16 deletions
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14
src/pipeline.cc
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@@ -889,9 +889,9 @@ class PipelineWorker : public Napi::AsyncWorker {
image = image[0];
baton->channels = 1;
}
if (image.format() != VIPS_FORMAT_UCHAR) {
// Cast pixels to uint8 (unsigned char)
image = image.cast(VIPS_FORMAT_UCHAR);
if (image.format() != baton->rawDepth) {
// Cast pixels to requested format
image = image.cast(baton->rawDepth);
}
// Get raw image data
baton->bufferOut = static_cast<char*>(image.write_to_memory(&baton->bufferOutLength));
@@ -1131,6 +1131,9 @@ class PipelineWorker : public Napi::AsyncWorker {
info.Set("width", static_cast<uint32_t>(width));
info.Set("height", static_cast<uint32_t>(height));
info.Set("channels", static_cast<uint32_t>(baton->channels));
if (baton->formatOut == "raw") {
info.Set("depth", vips_enum_nick(VIPS_TYPE_BAND_FORMAT, baton->rawDepth));
}
info.Set("premultiplied", baton->premultiplied);
if (baton->hasCropOffset) {
info.Set("cropOffsetLeft", static_cast<int32_t>(baton->cropOffsetLeft));
@@ -1457,6 +1460,11 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
baton->heifSpeed = sharp::AttrAsUint32(options, "heifSpeed");
baton->heifChromaSubsampling = sharp::AttrAsStr(options, "heifChromaSubsampling");
// Raw output
baton->rawDepth = static_cast<VipsBandFormat>(
vips_enum_from_nick(nullptr, VIPS_TYPE_BAND_FORMAT,
sharp::AttrAsStr(options, "rawDepth").data()));
// Animated output
if (sharp::HasAttr(options, "pageHeight")) {
baton->pageHeight = sharp::AttrAsUint32(options, "pageHeight");