[svgcanvas] Consolidate constant-Y text positions
When SkBaseDevice switched to drawGlyphRunList(), we lost the ability to
detect a) constant-Y text and b) default-positioned text.
As a result, the emitted SVG contains lots of redundant/repeating glyph
positions.
This CL enhances SVGTextBuilder to detect and consolidate constant-Y
glyph positions.
Also restore a useful whitespace unit test.
Change-Id: I50568aef1955f75898ebab41441ad5fe418dac43
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228563
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
2 files changed
