In <image> element, preserveAspectRatio attribute default value is 'xMidYMid meet'.

https://www.w3.org/TR/SVG11/coords.html#PreserveAspectRatioAttribute

# image opacity fix

Updated threading tests to use the resource file, updated the file loader in the test helper to be flagged as obsolete and changed the working of the multi-threading fail test since this is not always failing with the error while processing the SVG. If it's not failing now it will be flagged inconclusive.

Fix fill usage by passing Color.Transparent color

Fixed inproper use of UTF8Encoding. As it was written before, UTF8Encoding.Default actually returns base class static property Encoding.Default which is system's default ANSI code-page based encoding that is not UTF8.

Fix rendering error on 64 bit IIS, ColorBlend position must be betwee…

Fix scaling of Draw(width, height)

Test runner: minor GUI improvements

- moved passing/failed/other tests into separate tabs
- removed functionless menu
- changed title

Added test description in test runner

- show description for W3C tests

Add a text copy of the Ms-PL and update Markdown formatting

Fixed inheritance of  text-anchor and baseline-shift attributes

- fixes text-text-12-t.svg

- use GetInheritedAttribute() to correctly handle "Inherit" value
- fixes inheritance of these attributes from groups
- fixes alignment in types-basic-01-f.svg test

- ensures that #243 is fixed

Found better solution to SvgClosePathSegment tested with Tiger.

Reverted unneeded part of previous fix

- caused regression

Prevent crashes on zero length segments or paths

Correctly handle embedded SVG fragments without viewbox

- fixes __tiger.svg test image

- calculate svg element bounds considering child svg fragments
- consider svg fragment offset in bounds / dimensions
- do not create view box if none is defined
- fixes #244

Use Hidden as default SvgOverflow value

- changes behavior to be as described in this file and in the W3C test
masking-path-03-b
- fixes that test
- this has been a regression after removing the unconditional clip box
for every view box, (see #279)

Fixed PushTransform for SvgUse

Do not create a clip region for view box

Allow relative paths for image URLs

- fixed matrix order (Prepend instead of Append)
- fixes #64 (see __issue-064-01.svg and __issue-064-02.svg)
- fixes test for struct-use-03-t.svg

- relative URL have not been loaded (example: masking-path-06-b.svg in test data)
- Updated passing tests (note: not all changes are related to the current fix)

- a view box does not need a clip region, this breaks the overflow
handling
- overflow handling:  handle overflow attribut "Inherit" as Visible and
"Scroll" as Hidden as per W3C documentation
- fixes #279

Added array caching to AddToPath for a significant performance increase.