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Add support for Buffer and Stream-based TIFF output

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Lovell Fuller
2017-05-04 16:40:49 +01:00
parent 19dd6a997f
commit c8e59f08ec
7 changed files with 42 additions and 6 deletions
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20
src/pipeline.cc
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@@ -734,7 +734,7 @@ class PipelineWorker : public Nan::AsyncWorker {
baton->width = image.width();
baton->height = image.height();
// Output
if (baton->fileOut == "") {
if (baton->fileOut.empty()) {
// Buffer output
if (baton->formatOut == "jpeg" || (baton->formatOut == "input" && inputImageType == ImageType::JPEG)) {
// Write JPEG to buffer
@@ -786,6 +786,24 @@ class PipelineWorker : public Nan::AsyncWorker {
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "webp";
} else if (baton->formatOut == "tiff" || (baton->formatOut == "input" && inputImageType == ImageType::TIFF)) {
// Cast pixel values to float, if required
if (baton->tiffPredictor == VIPS_FOREIGN_TIFF_PREDICTOR_FLOAT) {
image = image.cast(VIPS_FORMAT_FLOAT);
}
// Write TIFF to buffer
VipsArea *area = VIPS_AREA(image.tiffsave_buffer(VImage::option()
->set("strip", !baton->withMetadata)
->set("Q", baton->tiffQuality)
->set("squash", baton->tiffSquash)
->set("compression", baton->tiffCompression)
->set("predictor", baton->tiffPredictor)));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "tiff";
baton->channels = std::min(baton->channels, 3);
} else if (baton->formatOut == "raw" || (baton->formatOut == "input" && inputImageType == ImageType::RAW)) {
// Write raw, uncompressed image data to buffer
if (baton->greyscale || image.interpretation() == VIPS_INTERPRETATION_B_W) {