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Better handle thumbnail generation of extreme aspect ratio images (fixes #3794)

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* Backport fix taken from ART
* Enforce minimal thumbnail size of 1x1 px in two places, prevents divison by zero and empty image generation
This commit is contained in:
Floessie
2020-10-25 18:24:30 +01:00
committed by GitHub
parent b4f68adb64
commit 1318935a87
11 changed files with 82 additions and 57 deletions
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2
rtgui/thumbnail.h
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@@ -119,7 +119,7 @@ public:
// unsigned char* getThumbnailImage (int &w, int &h, int fixwh=1); // fixwh = 0: fix w and calculate h, =1: fix h and calculate w
rtengine::IImage8* processThumbImage (const rtengine::procparams::ProcParams& pparams, int h, double& scale);
rtengine::IImage8* upgradeThumbImage (const rtengine::procparams::ProcParams& pparams, int h, double& scale);
int getThumbnailWidth (int h, const rtengine::procparams::ProcParams *pparams = nullptr) const;
void getThumbnailSize (int &w, int &h, const rtengine::procparams::ProcParams *pparams = nullptr);
void getFinalSize (const rtengine::procparams::ProcParams& pparams, int& w, int& h);
void getOriginalSize (int& w, int& h);