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Simplify 90/270 orient-before-resize logic (#3762)

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This commit is contained in:
Kleis Auke Wolthuizen
2023-08-15 08:56:07 +02:00
committed by GitHub
parent 5c19f6dd9b
commit a2cac61209
4 changed files with 29 additions and 20 deletions
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15
src/pipeline.cc
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@@ -157,15 +157,18 @@ class PipelineWorker : public Napi::AsyncWorker {
int targetResizeWidth = baton->width;
int targetResizeHeight = baton->height;
// Swap input output width and height when rotating by 90 or 270 degrees
bool swap = !baton->rotateBeforePreExtract &&
(rotation == VIPS_ANGLE_D90 || rotation == VIPS_ANGLE_D270 ||
autoRotation == VIPS_ANGLE_D90 || autoRotation == VIPS_ANGLE_D270);
// 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, swap, baton->withoutEnlargement, baton->withoutReduction);
baton->canvas, baton->withoutEnlargement, baton->withoutReduction);
// The jpeg preload shrink.
int jpegShrinkOnLoad = 1;
@@ -299,7 +302,7 @@ 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->withoutReduction);
baton->canvas, baton->withoutEnlargement, baton->withoutReduction);
int targetHeight = static_cast<int>(std::rint(static_cast<double>(pageHeight) / vshrink));
int targetPageHeight = targetHeight;