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Expose WebP alpha quality, lossless and near-lossless output options (#685)

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This commit is contained in:
Rahul Nanwani
2017-01-19 19:15:32 +05:30
committed by Lovell Fuller
parent 815d076b35
commit a1b8efe721
9 changed files with 88 additions and 1 deletions
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14
src/pipeline.cc
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@@ -767,6 +767,9 @@ class PipelineWorker : public Nan::AsyncWorker {
VipsArea *area = VIPS_AREA(image.webpsave_buffer(VImage::option()
->set("strip", !baton->withMetadata)
->set("Q", baton->webpQuality)
->set("lossless", baton->webpLossless)
->set("near_lossless", baton->webpNearLossless)
->set("alpha_q", baton->webpAlphaQuality)
));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
@@ -844,6 +847,9 @@ class PipelineWorker : public Nan::AsyncWorker {
image.webpsave(const_cast<char*>(baton->fileOut.data()), VImage::option()
->set("strip", !baton->withMetadata)
->set("Q", baton->webpQuality)
->set("lossless", baton->webpLossless)
->set("near_lossless", baton->webpNearLossless)
->set("alpha_q", baton->webpAlphaQuality)
);
baton->formatOut = "webp";
} else if (baton->formatOut == "tiff" || isTiff || (matchInput && inputImageType == ImageType::TIFF)) {
@@ -870,7 +876,10 @@ class PipelineWorker : public Nan::AsyncWorker {
suffix = AssembleSuffixString(".png", options);
} else if (baton->tileFormat == "webp") {
std::vector<std::pair<std::string, std::string>> options {
{"Q", std::to_string(baton->webpQuality)}
{"Q", std::to_string(baton->webpQuality)},
{"alpha_q", std::to_string(baton->webpAlphaQuality)},
{"lossless", baton->webpLossless ? "TRUE" : "FALSE"},
{"near_lossless", baton->webpNearLossless ? "TRUE" : "FALSE"}
};
suffix = AssembleSuffixString(".webp", options);
} else {
@@ -1209,6 +1218,9 @@ NAN_METHOD(pipeline) {
baton->pngCompressionLevel = AttrTo<uint32_t>(options, "pngCompressionLevel");
baton->pngAdaptiveFiltering = AttrTo<bool>(options, "pngAdaptiveFiltering");
baton->webpQuality = AttrTo<uint32_t>(options, "webpQuality");
baton->webpAlphaQuality = AttrTo<uint32_t>(options, "webpAlphaQuality");
baton->webpLossless = AttrTo<bool>(options, "webpLossless");
baton->webpNearLossless = AttrTo<bool>(options, "webpNearLossless");
baton->tiffQuality = AttrTo<uint32_t>(options, "tiffQuality");
// Tile output
baton->tileSize = AttrTo<uint32_t>(options, "tileSize");

3
src/pipeline.h
View File

@@ -84,6 +84,9 @@ struct PipelineBaton {
int pngCompressionLevel;
bool pngAdaptiveFiltering;
int webpQuality;
int webpAlphaQuality;
bool webpNearLossless;
bool webpLossless;
int tiffQuality;
std::string err;
bool withMetadata;