Commit: 66df8fff328079615dfa222eb7409826a785d6a9
Author: Sergey Sharybin
Date: Fri Jul 10 11:31:16 2020 +0200
Branches: blender-v2.90-release
https://developer.blender.org/rB66df8fff328079615dfa222eb7409826a785d6a9
Compositor: Fix calculation of preview resolution
Were two issues:
- Divider was calculated in integer domain, causing rounding issues in
general case, and causing singularity in a corner case when input is
smaller than the preview size.
- The resolution was scaled down by 1 pixel for no obvious reason.
===================================================================
M source/blender/compositor/operations/COM_PreviewOperation.cpp
===================================================================
diff --git a/source/blender/compositor/operations/COM_PreviewOperation.cpp
b/source/blender/compositor/operations/COM_PreviewOperation.cpp
index 30fe2ca824d..07bf534cd74 100644
--- a/source/blender/compositor/operations/COM_PreviewOperation.cpp
+++ b/source/blender/compositor/operations/COM_PreviewOperation.cpp
@@ -130,10 +130,10 @@ void PreviewOperation::determineResolution(unsigned int
resolution[2],
int height = resolution[1];
this->m_divider = 0.0f;
if (width > height) {
- this->m_divider = COM_PREVIEW_SIZE / (width - 1);
+ this->m_divider = (float)COM_PREVIEW_SIZE / (width);
}
else {
- this->m_divider = COM_PREVIEW_SIZE / (height - 1);
+ this->m_divider = (float)COM_PREVIEW_SIZE / (height);
}
width = width * this->m_divider;
height = height * this->m_divider;
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