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Ensure withoutReduction does not interfere with contain/crop/embed (#3081)

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This commit is contained in:
Kleis Auke Wolthuizen
2022-02-08 22:22:23 +01:00
committed by GitHub
parent 7eb5efa3a3
commit 83db5f8a2a
4 changed files with 14 additions and 54 deletions
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13
src/common.cc
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@@ -885,7 +885,7 @@ namespace sharp {
}
std::pair<double, double> ResolveShrink(int width, int height, int targetWidth, int targetHeight,
Canvas canvas, bool swap, bool withoutEnlargement) {
Canvas canvas, bool swap, bool withoutEnlargement, bool withoutReduction) {
if (swap) {
// Swap input width and height when requested.
std::swap(width, height);
@@ -940,9 +940,14 @@ namespace sharp {
}
}
// We should not enlarge (oversample) the output image,
// if withoutEnlargement is specified.
if (withoutEnlargement) {
// We should not reduce or enlarge the output image, if
// withoutReduction or withoutEnlargement is specified.
if (withoutReduction) {
// Equivalent of VIPS_SIZE_UP
hshrink = std::min(1.0, hshrink);
vshrink = std::min(1.0, vshrink);
} else if (withoutEnlargement) {
// Equivalent of VIPS_SIZE_DOWN
hshrink = std::max(1.0, hshrink);
vshrink = std::max(1.0, vshrink);
}

2
src/common.h
View File

@@ -345,7 +345,7 @@ namespace sharp {
the required thumbnail width/height and canvas mode.
*/
std::pair<double, double> ResolveShrink(int width, int height, int targetWidth, int targetHeight,
Canvas canvas, bool swap, bool withoutEnlargement);
Canvas canvas, bool swap, bool withoutEnlargement, bool withoutReduction);
} // namespace sharp

15
src/pipeline.cc
View File

@@ -138,17 +138,6 @@ class PipelineWorker : public Napi::AsyncWorker {
pageHeight = inputHeight;
}
// If withoutReduction is specified,
// Override target width and height if less than respective value from input file
if (baton->withoutReduction) {
if (baton->width < inputWidth) {
baton->width = inputWidth;
}
if (baton->height < inputHeight) {
baton->height = inputHeight;
}
}
// Scaling calculations
double hshrink;
double vshrink;
@@ -161,7 +150,7 @@ class PipelineWorker : public Napi::AsyncWorker {
// Shrink to pageHeight, so we work for multi-page images
std::tie(hshrink, vshrink) = sharp::ResolveShrink(
inputWidth, pageHeight, targetResizeWidth, targetResizeHeight,
baton->canvas, swap, baton->withoutEnlargement);
baton->canvas, swap, baton->withoutEnlargement, baton->withoutReduction);
// The jpeg preload shrink.
int jpegShrinkOnLoad = 1;
@@ -286,7 +275,7 @@ class PipelineWorker : public Napi::AsyncWorker {
// Shrink to pageHeight, so we work for multi-page images
std::tie(hshrink, vshrink) = sharp::ResolveShrink(
inputWidth, pageHeight, targetResizeWidth, targetResizeHeight,
baton->canvas, swap, baton->withoutEnlargement);
baton->canvas, swap, baton->withoutEnlargement, baton->withoutReduction);
int targetHeight = static_cast<int>(std::rint(static_cast<double>(pageHeight) / vshrink));
int targetPageHeight = targetHeight;