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davve@opera.com authored
When crossing the svg -> html boundary through a foreignObject, the zoom factor is reset to its initial value. This is because SVG has a special zoom model where the SVG fragment root puts the scale factor on the graphics context, in contrast to non-SVG content where each value is scaled individually. This means the FontBuilder can't just inherit the font from parent when crossing a foreignObject boundary. It may have to recompute the font size because the effective zoom, included in the computed font size, may change. Example of behavior after this patch: <html> <!-- computed font size: 16px. --> <body style="zoom: 2"> <!-- computed font size: 32px. --> <svg> <!-- scale(2) is applied to the graphics context; computed font size: 32px. --> <text>Sample svg text.</text> <!-- svg ignores computed font size to be able to support minimal font size. --> <foreignObject> <!-- html rendering again but scale(2) still applied to GC. computed font size must be reset to 16px. --> Sample html text. <!-- Text drawn with computed font size 16px but scaled to 32px by the GC --> In this annotated test, 'Sample html text.' and 'Sample svg text.' should both be displayed with a 32px font size. Note: One difference is that the 'sample html text' is not sensitive to the correct minimal font size since that happens before the scale on the GC is applied. In order to get proper minimal font size working on foreignObject, we would probably have to put foreignObject in a layer separated from the graphical context of the SVG. BUG=374119 Review URL: https://codereview.chromium.org/308123010 git-svn-id: svn://svn.chromium.org/blink/trunk@175562 bbb929c8-8fbe-4397-9dbb-9b2b2021853818f0099a
