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Subject [Bug 120604] New: curious colors in gradients, when using small step-count
Date Fri, 17 Aug 2012 09:47:20 GMT

          Priority: P3
            Bug ID: 120604
           Summary: curious colors in gradients, when using small
          Severity: normal
        Issue Type: DEFECT
    Classification: Application
                OS: Windows XP
          Hardware: All
            Status: UNCONFIRMED
           Version: AOO350-dev
         Component: viewing
           Product: drawing

Created attachment 78992
Testcases for axial gradient

Open attached document. It shows some test cases.

I expect, that an axial gradient is a mirrored linear gradient. So a linear
filling of 10cm height should be the same as the half of an axial gradient in
20cm height. This works well with a step count of 256 (max possible value in
UI). But when you set the step count to 5, you see these errors:
- The number of steps in the axial fill is not 2*5=10 but 8
- The inner color does not come near enough to the center color.

Compared to a square filling all is good in maximal step count 256. Setting the
step count to 5 you can see these errors (or at least inconsistencies)
- The colors of the linear gradient have a different scale than the colors in
the square gradient. The square gradient reaches the end color, the linear
gradient does not reach it.
- The colors of the axial gradient reach neither the start not the end color.
- The colors of an axial gradient are reversed in comparison to a square
gradient. A square gradient has the end color in center, but the axial gradient
has the start color in center. 

Show the axial gradient in presentation mode or print it (I have used image
writer), then the gradient is totally wrong. (This is an old error, but I have
not fount an issue, that tracks it already.)

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