596251 - Incorrect rendering of SVG gradients under Direct2D

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Alex]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20100914 Firefox/4.0b7pre
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b7pre) Gecko/20100914 Firefox/4.0b7pre

At certain sizes, gradients in SVG files can be drawn as if they were in the wrong position (i.e. they draw in the correct position, but with the offsets and positions set like they start further to the left or right, etc.), or vanish entirely in SVG files when using Direct2D.

It can also be seen when zooming in or out while displaying the SVG file (via <object> or <img>)

When linking to the SVG file via an <img> tag, the drag image generated by dragging doesn't display the issue.

Reproducible: Always

Comment 1

[Alex]

Attachment: Monkey emoticon from Tango project showing the issue

When displaying the file normally, zooming in and out a couple of steps causes the monkey's mouth to vanish.

The mouth doesn't show for me when it's loaded via an <img> tag.

Comment 2

[Alex]

Attachment: Another gradient issue.

I just noticed this test file I created a while ago also has a drawing issue with the gradient.

Comment 3

[Joe Drew (not getting mail)]

Bas says he sees differences between GDI and D2D.

Alex, can you post screenshots of what you see when the rendering goes wrong?

Comment 4

[Alex]

Attachment: Monkey Comparison

Here's what I see zooming into the Monkey emoticon by 2 steps.

Top is D2D's rendering, bottom is GDI's rendering (Well, I think pixman is responsible in this mode)

Comment 5

[Alex]

Attachment: Gradient thing comparison

This is at normal 100% zoom.

Left is D2D, right is GDI.

Comment 6

[Joe Drew (not getting mail)]

The monkey now looks fine, but "Another gradient issue" looks very different, D2D vs pixman/gdi.

Comment 7

[Joe Drew (not getting mail)]

Unsurprisingly, it looks the same, cairo-d2d vs azure-d2d; this might change when we've got SVG using Azure directly.

Comment 8

[Guilherme Lima]

This seems fine. Both Firefox 17 and Firefox 19 display the expected result.

Comment 9

[Guilherme Lima]

On Windows 7, both examples work OK, with and without HWA.