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pipeline.cc
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// Copyright 2013 Lovell Fuller and others.
// SPDX-License-Identifier: Apache-2.0
#include <algorithm>
#include <cmath>
#include <map>
#include <memory>
#include <numeric>
#include <string>
#include <tuple>
#include <utility>
#include <vector>
#include <sys/types.h>
#include <sys/stat.h>
#include <vips/vips8>
#include <napi.h>
#include "common.h"
#include "operations.h"
#include "pipeline.h"
#ifdef _WIN32
#define STAT64_STRUCT __stat64
#define STAT64_FUNCTION _stat64
#elif defined(_LARGEFILE64_SOURCE)
#define STAT64_STRUCT stat64
#define STAT64_FUNCTION stat64
#else
#define STAT64_STRUCT stat
#define STAT64_FUNCTION stat
#endif
class PipelineWorker : public Napi::AsyncWorker {
public:
PipelineWorker(Napi::Function callback, PipelineBaton *baton,
Napi::Function debuglog, Napi::Function queueListener) :
Napi::AsyncWorker(callback),
baton(baton),
debuglog(Napi::Persistent(debuglog)),
queueListener(Napi::Persistent(queueListener)) {}
~PipelineWorker() {}
// libuv worker
void Execute() {
// Decrement queued task counter
sharp::counterQueue--;
// Increment processing task counter
sharp::counterProcess++;
try {
// Open input
vips::VImage image;
sharp::ImageType inputImageType;
std::tie(image, inputImageType) = sharp::OpenInput(baton->input);
VipsAccess access = baton->input->access;
image = sharp::EnsureColourspace(image, baton->colourspacePipeline);
int nPages = baton->input->pages;
if (nPages == -1) {
// Resolve the number of pages if we need to render until the end of the document
nPages = image.get_typeof(VIPS_META_N_PAGES) != 0
? image.get_int(VIPS_META_N_PAGES) - baton->input->page
: 1;
}
// Get pre-resize page height
int pageHeight = sharp::GetPageHeight(image);
// Calculate angle of rotation
VipsAngle rotation = VIPS_ANGLE_D0;
VipsAngle autoRotation = VIPS_ANGLE_D0;
bool autoFlip = false;
bool autoFlop = false;
if (baton->useExifOrientation) {
// Rotate and flip image according to Exif orientation
std::tie(autoRotation, autoFlip, autoFlop) = CalculateExifRotationAndFlip(sharp::ExifOrientation(image));
image = sharp::RemoveExifOrientation(image);
} else {
rotation = CalculateAngleRotation(baton->angle);
}
// Rotate pre-extract
bool const shouldRotateBefore = baton->rotateBeforePreExtract &&
(rotation != VIPS_ANGLE_D0 || autoRotation != VIPS_ANGLE_D0 ||
autoFlip || baton->flip || autoFlop || baton->flop ||
baton->rotationAngle != 0.0);
if (shouldRotateBefore) {
image = sharp::StaySequential(image,
rotation != VIPS_ANGLE_D0 ||
autoRotation != VIPS_ANGLE_D0 ||
autoFlip ||
baton->flip ||
baton->rotationAngle != 0.0);
if (autoRotation != VIPS_ANGLE_D0) {
if (autoRotation != VIPS_ANGLE_D180) {
MultiPageUnsupported(nPages, "Rotate");
}
image = image.rot(autoRotation);
autoRotation = VIPS_ANGLE_D0;
}
if (autoFlip) {
image = image.flip(VIPS_DIRECTION_VERTICAL);
autoFlip = false;
} else if (baton->flip) {
image = image.flip(VIPS_DIRECTION_VERTICAL);
baton->flip = false;
}
if (autoFlop) {
image = image.flip(VIPS_DIRECTION_HORIZONTAL);
autoFlop = false;
} else if (baton->flop) {
image = image.flip(VIPS_DIRECTION_HORIZONTAL);
baton->flop = false;
}
if (rotation != VIPS_ANGLE_D0) {
if (rotation != VIPS_ANGLE_D180) {
MultiPageUnsupported(nPages, "Rotate");
}
image = image.rot(rotation);
rotation = VIPS_ANGLE_D0;
}
if (baton->rotationAngle != 0.0) {
MultiPageUnsupported(nPages, "Rotate");
std::vector<double> background;
std::tie(image, background) = sharp::ApplyAlpha(image, baton->rotationBackground, false);
image = image.rotate(baton->rotationAngle, VImage::option()->set("background", background)).copy_memory();
}
}
// Trim
if (baton->trimThreshold >= 0.0) {
MultiPageUnsupported(nPages, "Trim");
image = sharp::StaySequential(image);
image = sharp::Trim(image, baton->trimBackground, baton->trimThreshold, baton->trimLineArt);
baton->trimOffsetLeft = image.xoffset();
baton->trimOffsetTop = image.yoffset();
}
// Pre extraction
if (baton->topOffsetPre != -1) {
image = nPages > 1
? sharp::CropMultiPage(image,
baton->leftOffsetPre, baton->topOffsetPre, baton->widthPre, baton->heightPre, nPages, &pageHeight)
: image.extract_area(baton->leftOffsetPre, baton->topOffsetPre, baton->widthPre, baton->heightPre);
}
// Get pre-resize image width and height
int inputWidth = image.width();
int inputHeight = image.height();
// Is there just one page? Shrink to inputHeight instead
if (nPages == 1) {
pageHeight = inputHeight;
}
// Scaling calculations
double hshrink;
double vshrink;
int targetResizeWidth = baton->width;
int targetResizeHeight = baton->height;
// When auto-rotating by 90 or 270 degrees, swap the target width and
// height to ensure the behavior aligns with how it would have been if
// the rotation had taken place *before* resizing.
if (!baton->rotateBeforePreExtract &&
(autoRotation == VIPS_ANGLE_D90 || autoRotation == VIPS_ANGLE_D270)) {
std::swap(targetResizeWidth, targetResizeHeight);
}
// Shrink to pageHeight, so we work for multi-page images
std::tie(hshrink, vshrink) = sharp::ResolveShrink(
inputWidth, pageHeight, targetResizeWidth, targetResizeHeight,
baton->canvas, baton->withoutEnlargement, baton->withoutReduction);
// The jpeg preload shrink.
int jpegShrinkOnLoad = 1;
// WebP, PDF, SVG scale
double scale = 1.0;
// Try to reload input using shrink-on-load for JPEG, WebP, SVG and PDF, when:
// - the width or height parameters are specified;
// - gamma correction doesn't need to be applied;
// - trimming or pre-resize extract isn't required;
// - input colourspace is not specified;
bool const shouldPreShrink = (targetResizeWidth > 0 || targetResizeHeight > 0) &&
baton->gamma == 0 && baton->topOffsetPre == -1 && baton->trimThreshold < 0.0 &&
baton->colourspacePipeline == VIPS_INTERPRETATION_LAST && !shouldRotateBefore;
if (shouldPreShrink) {
// The common part of the shrink: the bit by which both axes must be shrunk
double shrink = std::min(hshrink, vshrink);
if (inputImageType == sharp::ImageType::JPEG) {
// Leave at least a factor of two for the final resize step, when fastShrinkOnLoad: false
// for more consistent results and to avoid extra sharpness to the image
int factor = baton->fastShrinkOnLoad ? 1 : 2;
if (shrink >= 8 * factor) {
jpegShrinkOnLoad = 8;
} else if (shrink >= 4 * factor) {
jpegShrinkOnLoad = 4;
} else if (shrink >= 2 * factor) {
jpegShrinkOnLoad = 2;
}
// Lower shrink-on-load for known libjpeg rounding errors
if (jpegShrinkOnLoad > 1 && static_cast<int>(shrink) == jpegShrinkOnLoad) {
jpegShrinkOnLoad /= 2;
}
} else if (inputImageType == sharp::ImageType::WEBP && baton->fastShrinkOnLoad && shrink > 1.0) {
// Avoid upscaling via webp
scale = 1.0 / shrink;
} else if (inputImageType == sharp::ImageType::SVG ||
inputImageType == sharp::ImageType::PDF) {
scale = 1.0 / shrink;
}
}
// Reload input using shrink-on-load, it'll be an integer shrink
// factor for jpegload*, a double scale factor for webpload*,
// pdfload* and svgload*
if (jpegShrinkOnLoad > 1) {
vips::VOption *option = VImage::option()
->set("access", access)
->set("shrink", jpegShrinkOnLoad)
->set("unlimited", baton->input->unlimited)
->set("fail_on", baton->input->failOn);
if (baton->input->buffer != nullptr) {
// Reload JPEG buffer
VipsBlob *blob = vips_blob_new(nullptr, baton->input->buffer, baton->input->bufferLength);
image = VImage::jpegload_buffer(blob, option);
vips_area_unref(reinterpret_cast<VipsArea*>(blob));
} else {
// Reload JPEG file
image = VImage::jpegload(const_cast<char*>(baton->input->file.data()), option);
}
} else if (scale != 1.0) {
vips::VOption *option = VImage::option()
->set("access", access)
->set("scale", scale)
->set("fail_on", baton->input->failOn);
if (inputImageType == sharp::ImageType::WEBP) {
option->set("n", baton->input->pages);
option->set("page", baton->input->page);
if (baton->input->buffer != nullptr) {
// Reload WebP buffer
VipsBlob *blob = vips_blob_new(nullptr, baton->input->buffer, baton->input->bufferLength);
image = VImage::webpload_buffer(blob, option);
vips_area_unref(reinterpret_cast<VipsArea*>(blob));
} else {
// Reload WebP file
image = VImage::webpload(const_cast<char*>(baton->input->file.data()), option);
}
} else if (inputImageType == sharp::ImageType::SVG) {
option->set("unlimited", baton->input->unlimited);
option->set("dpi", baton->input->density);
if (baton->input->buffer != nullptr) {
// Reload SVG buffer
VipsBlob *blob = vips_blob_new(nullptr, baton->input->buffer, baton->input->bufferLength);
image = VImage::svgload_buffer(blob, option);
vips_area_unref(reinterpret_cast<VipsArea*>(blob));
} else {
// Reload SVG file
image = VImage::svgload(const_cast<char*>(baton->input->file.data()), option);
}
sharp::SetDensity(image, baton->input->density);
if (image.width() > 32767 || image.height() > 32767) {
throw vips::VError("Input SVG image will exceed 32767x32767 pixel limit when scaled");
}
} else if (inputImageType == sharp::ImageType::PDF) {
option->set("n", baton->input->pages);
option->set("page", baton->input->page);
option->set("dpi", baton->input->density);
if (baton->input->buffer != nullptr) {
// Reload PDF buffer
VipsBlob *blob = vips_blob_new(nullptr, baton->input->buffer, baton->input->bufferLength);
image = VImage::pdfload_buffer(blob, option);
vips_area_unref(reinterpret_cast<VipsArea*>(blob));
} else {
// Reload PDF file
image = VImage::pdfload(const_cast<char*>(baton->input->file.data()), option);
}
sharp::SetDensity(image, baton->input->density);
}
} else {
if (inputImageType == sharp::ImageType::SVG && (image.width() > 32767 || image.height() > 32767)) {
throw vips::VError("Input SVG image exceeds 32767x32767 pixel limit");
}
}
// Any pre-shrinking may already have been done
inputWidth = image.width();
inputHeight = image.height();
// After pre-shrink, but before the main shrink stage
// Reuse the initial pageHeight if we didn't pre-shrink
if (shouldPreShrink) {
pageHeight = sharp::GetPageHeight(image);
}
// Shrink to pageHeight, so we work for multi-page images
std::tie(hshrink, vshrink) = sharp::ResolveShrink(
inputWidth, pageHeight, targetResizeWidth, targetResizeHeight,
baton->canvas, baton->withoutEnlargement, baton->withoutReduction);
int targetHeight = static_cast<int>(std::rint(static_cast<double>(pageHeight) / vshrink));
int targetPageHeight = targetHeight;
// In toilet-roll mode, we must adjust vshrink so that we exactly hit
// pageHeight or we'll have pixels straddling pixel boundaries
if (inputHeight > pageHeight) {
targetHeight *= nPages;
vshrink = static_cast<double>(inputHeight) / targetHeight;
}
// Ensure we're using a device-independent colour space
std::pair<char*, size_t> inputProfile(nullptr, 0);
if ((baton->keepMetadata & VIPS_FOREIGN_KEEP_ICC) && baton->withIccProfile.empty()) {
// Cache input profile for use with output
inputProfile = sharp::GetProfile(image);
baton->input->ignoreIcc = true;
}
char const *processingProfile = image.interpretation() == VIPS_INTERPRETATION_RGB16 ? "p3" : "srgb";
if (
sharp::HasProfile(image) &&
image.interpretation() != VIPS_INTERPRETATION_LABS &&
image.interpretation() != VIPS_INTERPRETATION_GREY16 &&
baton->colourspacePipeline != VIPS_INTERPRETATION_CMYK &&
!baton->input->ignoreIcc
) {
// Convert to sRGB/P3 using embedded profile
try {
image = image.icc_transform(processingProfile, VImage::option()
->set("embedded", true)
->set("depth", sharp::Is16Bit(image.interpretation()) ? 16 : 8)
->set("intent", VIPS_INTENT_PERCEPTUAL));
} catch(...) {
sharp::VipsWarningCallback(nullptr, G_LOG_LEVEL_WARNING, "Invalid embedded profile", nullptr);
}
} else if (
image.interpretation() == VIPS_INTERPRETATION_CMYK &&
baton->colourspacePipeline != VIPS_INTERPRETATION_CMYK
) {
image = image.icc_transform(processingProfile, VImage::option()
->set("input_profile", "cmyk")
->set("intent", VIPS_INTENT_PERCEPTUAL));
}
// Flatten image to remove alpha channel
if (baton->flatten && sharp::HasAlpha(image)) {
image = sharp::Flatten(image, baton->flattenBackground);
}
// Gamma encoding (darken)
if (baton->gamma >= 1 && baton->gamma <= 3) {
image = sharp::Gamma(image, 1.0 / baton->gamma);
}
// Convert to greyscale (linear, therefore after gamma encoding, if any)
if (baton->greyscale) {
image = image.colourspace(VIPS_INTERPRETATION_B_W);
}
bool const shouldResize = hshrink != 1.0 || vshrink != 1.0;
bool const shouldBlur = baton->blurSigma != 0.0;
bool const shouldConv = baton->convKernelWidth * baton->convKernelHeight > 0;
bool const shouldSharpen = baton->sharpenSigma != 0.0;
bool const shouldComposite = !baton->composite.empty();
if (shouldComposite && !sharp::HasAlpha(image)) {
image = sharp::EnsureAlpha(image, 1);
}
VipsBandFormat premultiplyFormat = image.format();
bool const shouldPremultiplyAlpha = sharp::HasAlpha(image) &&
(shouldResize || shouldBlur || shouldConv || shouldSharpen);
if (shouldPremultiplyAlpha) {
image = image.premultiply().cast(premultiplyFormat);
}
// Resize
if (shouldResize) {
image = image.resize(1.0 / hshrink, VImage::option()
->set("vscale", 1.0 / vshrink)
->set("kernel", baton->kernel));
}
image = sharp::StaySequential(image,
autoRotation != VIPS_ANGLE_D0 ||
baton->flip ||
autoFlip ||
rotation != VIPS_ANGLE_D0);
// Auto-rotate post-extract
if (autoRotation != VIPS_ANGLE_D0) {
if (autoRotation != VIPS_ANGLE_D180) {
MultiPageUnsupported(nPages, "Rotate");
}
image = image.rot(autoRotation);
}
// Mirror vertically (up-down) about the x-axis
if (baton->flip || autoFlip) {
image = image.flip(VIPS_DIRECTION_VERTICAL);
}
// Mirror horizontally (left-right) about the y-axis
if (baton->flop || autoFlop) {
image = image.flip(VIPS_DIRECTION_HORIZONTAL);
}
// Rotate post-extract 90-angle
if (rotation != VIPS_ANGLE_D0) {
if (rotation != VIPS_ANGLE_D180) {
MultiPageUnsupported(nPages, "Rotate");
}
image = image.rot(rotation);
}
// Join additional color channels to the image
if (!baton->joinChannelIn.empty()) {
VImage joinImage;
sharp::ImageType joinImageType = sharp::ImageType::UNKNOWN;
for (unsigned int i = 0; i < baton->joinChannelIn.size(); i++) {
baton->joinChannelIn[i]->access = access;
std::tie(joinImage, joinImageType) = sharp::OpenInput(baton->joinChannelIn[i]);
joinImage = sharp::EnsureColourspace(joinImage, baton->colourspacePipeline);
image = image.bandjoin(joinImage);
}
image = image.copy(VImage::option()->set("interpretation", baton->colourspace));
image = sharp::RemoveGifPalette(image);
}
inputWidth = image.width();
inputHeight = nPages > 1 ? targetPageHeight : image.height();
// Resolve dimensions
if (baton->width <= 0) {
baton->width = inputWidth;
}
if (baton->height <= 0) {
baton->height = inputHeight;
}
// Crop/embed
if (inputWidth != baton->width || inputHeight != baton->height) {
if (baton->canvas == sharp::Canvas::EMBED) {
std::vector<double> background;
std::tie(image, background) = sharp::ApplyAlpha(image, baton->resizeBackground, shouldPremultiplyAlpha);
// Embed
int left;
int top;
std::tie(left, top) = sharp::CalculateEmbedPosition(
inputWidth, inputHeight, baton->width, baton->height, baton->position);
int width = std::max(inputWidth, baton->width);
int height = std::max(inputHeight, baton->height);
image = nPages > 1
? sharp::EmbedMultiPage(image,
left, top, width, height, VIPS_EXTEND_BACKGROUND, background, nPages, &targetPageHeight)
: image.embed(left, top, width, height, VImage::option()
->set("extend", VIPS_EXTEND_BACKGROUND)
->set("background", background));
} else if (baton->canvas == sharp::Canvas::CROP) {
if (baton->width > inputWidth) {
baton->width = inputWidth;
}
if (baton->height > inputHeight) {
baton->height = inputHeight;
}
// Crop
if (baton->position < 9) {
// Gravity-based crop
int left;
int top;
std::tie(left, top) = sharp::CalculateCrop(
inputWidth, inputHeight, baton->width, baton->height, baton->position);
int width = std::min(inputWidth, baton->width);
int height = std::min(inputHeight, baton->height);
image = nPages > 1
? sharp::CropMultiPage(image,
left, top, width, height, nPages, &targetPageHeight)
: image.extract_area(left, top, width, height);
} else {
int attention_x;
int attention_y;
// Attention-based or Entropy-based crop
MultiPageUnsupported(nPages, "Resize strategy");
image = sharp::StaySequential(image);
image = image.smartcrop(baton->width, baton->height, VImage::option()
->set("interesting", baton->position == 16 ? VIPS_INTERESTING_ENTROPY : VIPS_INTERESTING_ATTENTION)
->set("premultiplied", shouldPremultiplyAlpha)
->set("attention_x", &attention_x)
->set("attention_y", &attention_y));
baton->hasCropOffset = true;
baton->cropOffsetLeft = static_cast<int>(image.xoffset());
baton->cropOffsetTop = static_cast<int>(image.yoffset());
baton->hasAttentionCenter = true;
baton->attentionX = static_cast<int>(attention_x * jpegShrinkOnLoad / scale);
baton->attentionY = static_cast<int>(attention_y * jpegShrinkOnLoad / scale);
}
}
}
// Rotate post-extract non-90 angle
if (!baton->rotateBeforePreExtract && baton->rotationAngle != 0.0) {
MultiPageUnsupported(nPages, "Rotate");
image = sharp::StaySequential(image);
std::vector<double> background;
std::tie(image, background) = sharp::ApplyAlpha(image, baton->rotationBackground, shouldPremultiplyAlpha);
image = image.rotate(baton->rotationAngle, VImage::option()->set("background", background));
}
// Post extraction
if (baton->topOffsetPost != -1) {
if (nPages > 1) {
image = sharp::CropMultiPage(image,
baton->leftOffsetPost, baton->topOffsetPost, baton->widthPost, baton->heightPost,
nPages, &targetPageHeight);
// heightPost is used in the info object, so update to reflect the number of pages
baton->heightPost *= nPages;
} else {
image = image.extract_area(
baton->leftOffsetPost, baton->topOffsetPost, baton->widthPost, baton->heightPost);
}
}
// Affine transform
if (!baton->affineMatrix.empty()) {
MultiPageUnsupported(nPages, "Affine");
image = sharp::StaySequential(image);
std::vector<double> background;
std::tie(image, background) = sharp::ApplyAlpha(image, baton->affineBackground, shouldPremultiplyAlpha);
vips::VInterpolate interp = vips::VInterpolate::new_from_name(
const_cast<char*>(baton->affineInterpolator.data()));
image = image.affine(baton->affineMatrix, VImage::option()->set("background", background)
->set("idx", baton->affineIdx)
->set("idy", baton->affineIdy)
->set("odx", baton->affineOdx)
->set("ody", baton->affineOdy)
->set("interpolate", interp));
}
// Extend edges
if (baton->extendTop > 0 || baton->extendBottom > 0 || baton->extendLeft > 0 || baton->extendRight > 0) {
// Embed
baton->width = image.width() + baton->extendLeft + baton->extendRight;
baton->height = (nPages > 1 ? targetPageHeight : image.height()) + baton->extendTop + baton->extendBottom;
if (baton->extendWith == VIPS_EXTEND_BACKGROUND) {
std::vector<double> background;
std::tie(image, background) = sharp::ApplyAlpha(image, baton->extendBackground, shouldPremultiplyAlpha);
image = sharp::StaySequential(image, nPages > 1);
image = nPages > 1
? sharp::EmbedMultiPage(image,
baton->extendLeft, baton->extendTop, baton->width, baton->height,
baton->extendWith, background, nPages, &targetPageHeight)
: image.embed(baton->extendLeft, baton->extendTop, baton->width, baton->height,
VImage::option()->set("extend", baton->extendWith)->set("background", background));
} else {
std::vector<double> ignoredBackground(1);
image = sharp::StaySequential(image);
image = nPages > 1
? sharp::EmbedMultiPage(image,
baton->extendLeft, baton->extendTop, baton->width, baton->height,
baton->extendWith, ignoredBackground, nPages, &targetPageHeight)
: image.embed(baton->extendLeft, baton->extendTop, baton->width, baton->height,
VImage::option()->set("extend", baton->extendWith));
}
}
// Median - must happen before blurring, due to the utility of blurring after thresholding
if (baton->medianSize > 0) {
image = image.median(baton->medianSize);
}
// Threshold - must happen before blurring, due to the utility of blurring after thresholding
// Threshold - must happen before unflatten to enable non-white unflattening
if (baton->threshold != 0) {
image = sharp::Threshold(image, baton->threshold, baton->thresholdGrayscale);
}
// Blur
if (shouldBlur) {
image = sharp::Blur(image, baton->blurSigma, baton->precision, baton->minAmpl);
}
// Unflatten the image
if (baton->unflatten) {
image = sharp::Unflatten(image);
}
// Convolve
if (shouldConv) {
image = sharp::Convolve(image,
baton->convKernelWidth, baton->convKernelHeight,
baton->convKernelScale, baton->convKernelOffset,
baton->convKernel);
}
// Recomb
if (!baton->recombMatrix.empty()) {
image = sharp::Recomb(image, baton->recombMatrix);
}
// Modulate
if (baton->brightness != 1.0 || baton->saturation != 1.0 || baton->hue != 0.0 || baton->lightness != 0.0) {
image = sharp::Modulate(image, baton->brightness, baton->saturation, baton->hue, baton->lightness);
}
// Sharpen
if (shouldSharpen) {
image = sharp::Sharpen(image, baton->sharpenSigma, baton->sharpenM1, baton->sharpenM2,
baton->sharpenX1, baton->sharpenY2, baton->sharpenY3);
}
// Reverse premultiplication after all transformations
if (shouldPremultiplyAlpha) {
image = image.unpremultiply().cast(premultiplyFormat);
}
baton->premultiplied = shouldPremultiplyAlpha;
// Composite
if (shouldComposite) {
std::vector<VImage> images = { image };
std::vector<int> modes, xs, ys;
for (Composite *composite : baton->composite) {
VImage compositeImage;
sharp::ImageType compositeImageType = sharp::ImageType::UNKNOWN;
composite->input->access = access;
std::tie(compositeImage, compositeImageType) = sharp::OpenInput(composite->input);
compositeImage = sharp::EnsureColourspace(compositeImage, baton->colourspacePipeline);
// Verify within current dimensions
if (compositeImage.width() > image.width() || compositeImage.height() > image.height()) {
throw vips::VError("Image to composite must have same dimensions or smaller");
}
// Check if overlay is tiled
if (composite->tile) {
int across = 0;
int down = 0;
// Use gravity in overlay
if (compositeImage.width() <= image.width()) {
across = static_cast<int>(ceil(static_cast<double>(image.width()) / compositeImage.width()));
// Ensure odd number of tiles across when gravity is centre, north or south
if (composite->gravity == 0 || composite->gravity == 1 || composite->gravity == 3) {
across |= 1;
}
}
if (compositeImage.height() <= image.height()) {
down = static_cast<int>(ceil(static_cast<double>(image.height()) / compositeImage.height()));
// Ensure odd number of tiles down when gravity is centre, east or west
if (composite->gravity == 0 || composite->gravity == 2 || composite->gravity == 4) {
down |= 1;
}
}
if (across != 0 || down != 0) {
int left;
int top;
compositeImage = sharp::StaySequential(compositeImage).replicate(across, down);
if (composite->hasOffset) {
std::tie(left, top) = sharp::CalculateCrop(
compositeImage.width(), compositeImage.height(), image.width(), image.height(),
composite->left, composite->top);
} else {
std::tie(left, top) = sharp::CalculateCrop(
compositeImage.width(), compositeImage.height(), image.width(), image.height(), composite->gravity);
}
compositeImage = compositeImage.extract_area(left, top, image.width(), image.height());
}
// gravity was used for extract_area, set it back to its default value of 0
composite->gravity = 0;
}
// Ensure image to composite is sRGB with unpremultiplied alpha
compositeImage = compositeImage.colourspace(VIPS_INTERPRETATION_sRGB);
if (!sharp::HasAlpha(compositeImage)) {
compositeImage = sharp::EnsureAlpha(compositeImage, 1);
}
if (composite->premultiplied) compositeImage = compositeImage.unpremultiply();
// Calculate position
int left;
int top;
if (composite->hasOffset) {
// Composite image at given offsets
if (composite->tile) {
std::tie(left, top) = sharp::CalculateCrop(image.width(), image.height(),
compositeImage.width(), compositeImage.height(), composite->left, composite->top);
} else {
left = composite->left;
top = composite->top;
}
} else {
// Composite image with given gravity
std::tie(left, top) = sharp::CalculateCrop(image.width(), image.height(),
compositeImage.width(), compositeImage.height(), composite->gravity);
}
images.push_back(compositeImage);
modes.push_back(composite->mode);
xs.push_back(left);
ys.push_back(top);
}
image = VImage::composite(images, modes, VImage::option()->set("x", xs)->set("y", ys));
image = sharp::RemoveGifPalette(image);
}
// Gamma decoding (brighten)
if (baton->gammaOut >= 1 && baton->gammaOut <= 3) {
image = sharp::Gamma(image, baton->gammaOut);
}
// Linear adjustment (a * in + b)
if (!baton->linearA.empty()) {
image = sharp::Linear(image, baton->linearA, baton->linearB);
}
// Apply normalisation - stretch luminance to cover full dynamic range
if (baton->normalise) {
image = sharp::StaySequential(image);
image = sharp::Normalise(image, baton->normaliseLower, baton->normaliseUpper);
}
// Apply contrast limiting adaptive histogram equalization (CLAHE)
if (baton->claheWidth != 0 && baton->claheHeight != 0) {
image = sharp::StaySequential(image);
image = sharp::Clahe(image, baton->claheWidth, baton->claheHeight, baton->claheMaxSlope);
}
// Apply bitwise boolean operation between images
if (baton->boolean != nullptr) {
VImage booleanImage;
sharp::ImageType booleanImageType = sharp::ImageType::UNKNOWN;
baton->boolean->access = access;
std::tie(booleanImage, booleanImageType) = sharp::OpenInput(baton->boolean);
booleanImage = sharp::EnsureColourspace(booleanImage, baton->colourspacePipeline);
image = sharp::Boolean(image, booleanImage, baton->booleanOp);
image = sharp::RemoveGifPalette(image);
}
// Apply per-channel Bandbool bitwise operations after all other operations
if (baton->bandBoolOp >= VIPS_OPERATION_BOOLEAN_AND && baton->bandBoolOp < VIPS_OPERATION_BOOLEAN_LAST) {
image = sharp::Bandbool(image, baton->bandBoolOp);
}
// Tint the image
if (baton->tint[0] >= 0.0) {
image = sharp::Tint(image, baton->tint);
}
// Remove alpha channel, if any
if (baton->removeAlpha) {
image = sharp::RemoveAlpha(image);
}
// Ensure alpha channel, if missing
if (baton->ensureAlpha != -1) {
image = sharp::EnsureAlpha(image, baton->ensureAlpha);
}
// Convert image to sRGB, if not already
if (sharp::Is16Bit(image.interpretation())) {
image = image.cast(VIPS_FORMAT_USHORT);
}
if (image.interpretation() != baton->colourspace) {
// Convert colourspace, pass the current known interpretation so libvips doesn't have to guess
image = image.colourspace(baton->colourspace, VImage::option()->set("source_space", image.interpretation()));
// Transform colours from embedded profile to output profile
if ((baton->keepMetadata & VIPS_FOREIGN_KEEP_ICC) && baton->colourspacePipeline != VIPS_INTERPRETATION_CMYK &&
baton->withIccProfile.empty() && sharp::HasProfile(image)) {
image = image.icc_transform(processingProfile, VImage::option()
->set("embedded", true)
->set("depth", sharp::Is16Bit(image.interpretation()) ? 16 : 8)
->set("intent", VIPS_INTENT_PERCEPTUAL));
}
}
// Extract channel
if (baton->extractChannel > -1) {
if (baton->extractChannel >= image.bands()) {
if (baton->extractChannel == 3 && sharp::HasAlpha(image)) {
baton->extractChannel = image.bands() - 1;
} else {
(baton->err)
.append("Cannot extract channel ").append(std::to_string(baton->extractChannel))
.append(" from image with channels 0-").append(std::to_string(image.bands() - 1));
return Error();
}
}
VipsInterpretation colourspace = sharp::Is16Bit(image.interpretation())
? VIPS_INTERPRETATION_GREY16
: VIPS_INTERPRETATION_B_W;
image = image
.extract_band(baton->extractChannel)
.copy(VImage::option()->set("interpretation", colourspace));
}
// Apply output ICC profile
if (!baton->withIccProfile.empty()) {
try {
image = image.icc_transform(const_cast<char*>(baton->withIccProfile.data()), VImage::option()
->set("input_profile", processingProfile)
->set("embedded", true)
->set("depth", sharp::Is16Bit(image.interpretation()) ? 16 : 8)
->set("intent", VIPS_INTENT_PERCEPTUAL));
} catch(...) {
sharp::VipsWarningCallback(nullptr, G_LOG_LEVEL_WARNING, "Invalid profile", nullptr);
}
} else if (baton->keepMetadata & VIPS_FOREIGN_KEEP_ICC) {
image = sharp::SetProfile(image, inputProfile);
}
// Negate the colours in the image
if (baton->negate) {
image = sharp::Negate(image, baton->negateAlpha);
}
// Override EXIF Orientation tag
if (baton->withMetadataOrientation != -1) {
image = sharp::SetExifOrientation(image, baton->withMetadataOrientation);
}
// Override pixel density
if (baton->withMetadataDensity > 0) {
image = sharp::SetDensity(image, baton->withMetadataDensity);
}
// EXIF key/value pairs
if (baton->keepMetadata & VIPS_FOREIGN_KEEP_EXIF) {
image = image.copy();
if (!baton->withExifMerge) {
image = sharp::RemoveExif(image);
}
for (const auto& s : baton->withExif) {
image.set(s.first.data(), s.second.data());
}
}
// Number of channels used in output image
baton->channels = image.bands();
baton->width = image.width();
baton->height = image.height();
image = sharp::SetAnimationProperties(
image, nPages, targetPageHeight, baton->delay, baton->loop);
if (image.get_typeof(VIPS_META_PAGE_HEIGHT) == G_TYPE_INT) {
baton->pageHeightOut = image.get_int(VIPS_META_PAGE_HEIGHT);
baton->pagesOut = image.get_int(VIPS_META_N_PAGES);
}
// Output
sharp::SetTimeout(image, baton->timeoutSeconds);
if (baton->fileOut.empty()) {
// Buffer output
if (baton->formatOut == "jpeg" || (baton->formatOut == "input" && inputImageType == sharp::ImageType::JPEG)) {
// Write JPEG to buffer
sharp::AssertImageTypeDimensions(image, sharp::ImageType::JPEG);
VipsArea *area = reinterpret_cast<VipsArea*>(image.jpegsave_buffer(VImage::option()
->set("keep", baton->keepMetadata)
->set("Q", baton->jpegQuality)
->set("interlace", baton->jpegProgressive)
->set("subsample_mode", baton->jpegChromaSubsampling == "4:4:4"
? VIPS_FOREIGN_SUBSAMPLE_OFF
: VIPS_FOREIGN_SUBSAMPLE_ON)
->set("trellis_quant", baton->jpegTrellisQuantisation)
->set("quant_table", baton->jpegQuantisationTable)
->set("overshoot_deringing", baton->jpegOvershootDeringing)
->set("optimize_scans", baton->jpegOptimiseScans)
->set("optimize_coding", baton->jpegOptimiseCoding)));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "jpeg";
if (baton->colourspace == VIPS_INTERPRETATION_CMYK) {
baton->channels = std::min(baton->channels, 4);
} else {
baton->channels = std::min(baton->channels, 3);
}
} else if (baton->formatOut == "jp2" || (baton->formatOut == "input"
&& inputImageType == sharp::ImageType::JP2)) {
// Write JP2 to Buffer
sharp::AssertImageTypeDimensions(image, sharp::ImageType::JP2);
VipsArea *area = reinterpret_cast<VipsArea*>(image.jp2ksave_buffer(VImage::option()
->set("Q", baton->jp2Quality)
->set("lossless", baton->jp2Lossless)
->set("subsample_mode", baton->jp2ChromaSubsampling == "4:4:4"
? VIPS_FOREIGN_SUBSAMPLE_OFF : VIPS_FOREIGN_SUBSAMPLE_ON)
->set("tile_height", baton->jp2TileHeight)
->set("tile_width", baton->jp2TileWidth)));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "jp2";
} else if (baton->formatOut == "png" || (baton->formatOut == "input" &&
(inputImageType == sharp::ImageType::PNG || inputImageType == sharp::ImageType::SVG))) {
// Write PNG to buffer
sharp::AssertImageTypeDimensions(image, sharp::ImageType::PNG);
VipsArea *area = reinterpret_cast<VipsArea*>(image.pngsave_buffer(VImage::option()
->set("keep", baton->keepMetadata)
->set("interlace", baton->pngProgressive)
->set("compression", baton->pngCompressionLevel)
->set("filter", baton->pngAdaptiveFiltering ? VIPS_FOREIGN_PNG_FILTER_ALL : VIPS_FOREIGN_PNG_FILTER_NONE)
->set("palette", baton->pngPalette)
->set("Q", baton->pngQuality)
->set("effort", baton->pngEffort)
->set("bitdepth", sharp::Is16Bit(image.interpretation()) ? 16 : baton->pngBitdepth)
->set("dither", baton->pngDither)));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "png";
} else if (baton->formatOut == "webp" ||
(baton->formatOut == "input" && inputImageType == sharp::ImageType::WEBP)) {
// Write WEBP to buffer
sharp::AssertImageTypeDimensions(image, sharp::ImageType::WEBP);
VipsArea *area = reinterpret_cast<VipsArea*>(image.webpsave_buffer(VImage::option()
->set("keep", baton->keepMetadata)
->set("Q", baton->webpQuality)
->set("lossless", baton->webpLossless)
->set("near_lossless", baton->webpNearLossless)
->set("smart_subsample", baton->webpSmartSubsample)
->set("preset", baton->webpPreset)
->set("effort", baton->webpEffort)
->set("min_size", baton->webpMinSize)
->set("mixed", baton->webpMixed)
->set("alpha_q", baton->webpAlphaQuality)));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "webp";
} else if (baton->formatOut == "gif" ||
(baton->formatOut == "input" && inputImageType == sharp::ImageType::GIF)) {
// Write GIF to buffer
sharp::AssertImageTypeDimensions(image, sharp::ImageType::GIF);
VipsArea *area = reinterpret_cast<VipsArea*>(image.gifsave_buffer(VImage::option()
->set("keep", baton->keepMetadata)
->set("bitdepth", baton->gifBitdepth)
->set("effort", baton->gifEffort)
->set("reuse", baton->gifReuse)
->set("interlace", baton->gifProgressive)
->set("interframe_maxerror", baton->gifInterFrameMaxError)
->set("interpalette_maxerror", baton->gifInterPaletteMaxError)
->set("dither", baton->gifDither)));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "gif";
} else if (baton->formatOut == "tiff" ||
(baton->formatOut == "input" && inputImageType == sharp::ImageType::TIFF)) {
// Write TIFF to buffer
if (baton->tiffCompression == VIPS_FOREIGN_TIFF_COMPRESSION_JPEG) {
sharp::AssertImageTypeDimensions(image, sharp::ImageType::JPEG);
baton->channels = std::min(baton->channels, 3);
}
// Cast pixel values to float, if required
if (baton->tiffPredictor == VIPS_FOREIGN_TIFF_PREDICTOR_FLOAT) {
image = image.cast(VIPS_FORMAT_FLOAT);
}
VipsArea *area = reinterpret_cast<VipsArea*>(image.tiffsave_buffer(VImage::option()
->set("keep", baton->keepMetadata)
->set("Q", baton->tiffQuality)
->set("bitdepth", baton->tiffBitdepth)
->set("compression", baton->tiffCompression)
->set("miniswhite", baton->tiffMiniswhite)
->set("predictor", baton->tiffPredictor)
->set("pyramid", baton->tiffPyramid)
->set("tile", baton->tiffTile)
->set("tile_height", baton->tiffTileHeight)
->set("tile_width", baton->tiffTileWidth)
->set("xres", baton->tiffXres)
->set("yres", baton->tiffYres)
->set("resunit", baton->tiffResolutionUnit)));
baton->bufferOut = static_cast<char*>(area->data);
baton->bufferOutLength = area->length;
area->free_fn = nullptr;
vips_area_unref(area);
baton->formatOut = "tiff";
} else if (baton->formatOut == "heif" ||
(baton->formatOut == "input" && inputImageType == sharp::ImageType::HEIF)) {
// Write HEIF to buffer
sharp::AssertImageTypeDimensions(image, sharp::ImageType::HEIF);
image = sharp::RemoveAnimationProperties(image).cast(VIPS_FORMAT_UCHAR);
VipsArea *area = reinterpret_cast<VipsArea*>(image.heifsave_buffer(VImage::option()
->set("keep", baton->keepMetadata)
->set("Q", baton->heifQuality)
->set("compression", baton->heifCompression)
->set("effort", baton->heifEffort)
->set("bitdepth", baton->heifBitdepth)