https://bugs.documentfoundation.org/show_bug.cgi?id=155852
Bug ID: 155852
Summary: MCGR FILESAVE PPTX export of stepped gradient has
wrong colors
Product: LibreOffice
Version: 7.6.0.0 beta1+
Hardware: x86-64 (AMD64)
OS: Windows (All)
Status: UNCONFIRMED
Keywords: implementationError
Severity: normal
Priority: medium
Component: Impress
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Created attachment 187923
--> https://bugs.documentfoundation.org/attachment.cgi?id=187923&action=edit
examples with draw:gradient-step-count=4
Open attached fodp document and export it to pptx.
Open saved pptx document and compare it with original fodp document.
Errors:
Some colors are different from original colors.
Some sections have gradients but should be single-colored.
I think the problem is, that the step colors are calculated different in
rendering in LO than in export to OOXML.
Compare the rendering calculation in
https://opengrok.libreoffice.org/xref/core/vcl/source/outdev/gradient.cxx?r=dccd82b5#341
with export calculation in
https://opengrok.libreoffice.org/xref/core/basegfx/source/tools/bgradient.cxx?r=cdc015ff&fi=doApplySteps#760
Significant difference is on the one hand
const double fAlpha = static_cast<double>(i) / fStepsMinus1;
and on the other hand
const double fSingleStep(1.0 / static_cast<double>(nStepCount));
--
You are receiving this mail because:
You are the assignee for the bug.
