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Add raw, uncompressed image data output #136

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Lovell Fuller
2014-12-16 15:46:47 +00:00
parent 464fb1726d
commit a190ae6b08
4 changed files with 100 additions and 5 deletions
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31
src/resize.cc
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@@ -635,6 +635,35 @@ class ResizeWorker : public NanAsyncWorker {
return Error(baton, hook);
}
baton->outputFormat = "webp";
#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42)
} else if (baton->output == "__raw") {
// Write raw, uncompressed image data to buffer
if (baton->greyscale) {
// Extract first band for greyscale image
VipsImage *grey;
if (vips_extract_band(image, &grey, 1, NULL)) {
return Error(baton, hook);
}
vips_object_local(hook, grey);
image = grey;
}
if (image->BandFmt != VIPS_FORMAT_UCHAR) {
// Cast pixels to uint8 (unsigned char)
VipsImage *uchar;
if (vips_cast(image, &uchar, VIPS_FORMAT_UCHAR, NULL)) {
return Error(baton, hook);
}
vips_object_local(hook, uchar);
image = uchar;
}
// Get raw image data
baton->bufferOut = vips_image_write_to_memory(image, &baton->bufferOutLength);
if (baton->bufferOut == NULL) {
(baton->err).append("Could not allocate enough memory for raw output");
return Error(baton, hook);
}
baton->outputFormat = "raw";
#endif
} else {
bool outputJpeg = IsJpeg(baton->output);
bool outputPng = IsPng(baton->output);
@@ -649,7 +678,7 @@ class ResizeWorker : public NanAsyncWorker {
}
baton->outputFormat = "jpeg";
} else if (outputPng || (matchInput && inputImageType == ImageType::PNG)) {
#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 41)
#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42)
// Select PNG row filter
int filter = baton->withoutAdaptiveFiltering ? VIPS_FOREIGN_PNG_FILTER_NONE : VIPS_FOREIGN_PNG_FILTER_ALL;
// Write PNG to file