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Add support for multiple base distance field sizes.

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This improves quality at higher point sizes.

BUG=skia:2173
R=robertphillips@google.com

Author: jvanverth@google.com

Review URL: https://codereview.chromium.org/218613014

git-svn-id: http://skia.googlecode.com/svn/trunk@14030 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
commit-bot@chromium.org 2014-04-02 19:24:32 +00:00
parent d5424a425b
commit dc5cd8552e
1 changed files with 15 additions and 3 deletions
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18
src/gpu/GrDistanceFieldTextContext.cpp
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@ -23,7 +23,11 @@
static const int kGlyphCoordsAttributeIndex = 1;
static const int kBaseDFFontSize = 32;
static const int kSmallDFFontSize = 32;
static const int kSmallDFFontLimit = 32;
static const int kMediumDFFontSize = 64;
static const int kMediumDFFontLimit = 64;
static const int kLargeDFFontSize = 128;
SK_CONF_DECLARE(bool, c_DumpFontCache, "gpu.dumpFontCache", false,
"Dump the contents of the font cache before every purge.");
@ -303,9 +307,17 @@ inline void GrDistanceFieldTextContext::init(const GrPaint& paint, const SkPaint
fVertices = NULL;
fMaxVertices = 0;
fTextRatio = fSkPaint.getTextSize()/kBaseDFFontSize;
if (fSkPaint.getTextSize() <= kSmallDFFontLimit) {
fTextRatio = fSkPaint.getTextSize()/kSmallDFFontSize;
fSkPaint.setTextSize(SkIntToScalar(kSmallDFFontSize));
} else if (fSkPaint.getTextSize() <= kMediumDFFontLimit) {
fTextRatio = fSkPaint.getTextSize()/kMediumDFFontSize;
fSkPaint.setTextSize(SkIntToScalar(kMediumDFFontSize));
} else {
fTextRatio = fSkPaint.getTextSize()/kLargeDFFontSize;
fSkPaint.setTextSize(SkIntToScalar(kLargeDFFontSize));
}
fSkPaint.setTextSize(SkIntToScalar(kBaseDFFontSize));
fSkPaint.setLCDRenderText(false);
fSkPaint.setAutohinted(false);
fSkPaint.setSubpixelText(true);