ligature
-and corresponding-
https://bugs.webkit.org/show_bug.cgi?id=6136

Reviewed by Dave Hyatt.

This patch makes the SVG CSS property text-rendering work with any 
HTML, much like it does in Firefox. It accepts four possible input 
values: auto, optimizeSpeed, optimizeLegibility, and 
geometricPrecision. Right now, in this implementation, here is what 
those values correspond to:

auto = optimizeSpeed = what we normally when the value's not set
optimizeLegibility = geometricPrecision = ligatures + kerning

Add new file TextRenderingMode.h to the project files.
* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:

CSS support for the new CSSPropertyTextRendering
* css/CSSComputedStyleDeclaration.cpp:
(WebCore::):
(WebCore::CSSComputedStyleDeclaration::getPropertyCSSValue):
* css/CSSParser.cpp:
(WebCore::CSSParser::parseValue):
* css/CSSPrimitiveValueMappings.h:
(WebCore::CSSPrimitiveValue::CSSPrimitiveValue):
(WebCore::CSSPrimitiveValue::operator TextRenderingMode):
* css/CSSPropertyNames.in:
* css/CSSStyleSelector.cpp:
(WebCore::CSSStyleSelector::applyProperty):
* css/CSSValueKeywords.in:

All the old SVG CSS support for this property can go away. When 
it's used in SVG, it will just fall into the normal HTML case.
* css/SVGCSSComputedStyleDeclaration.cpp:
(WebCore::CSSComputedStyleDeclaration::getSVGPropertyCSSValue):
* css/SVGCSSParser.cpp:
(WebCore::CSSParser::parseSVGValue):
* css/SVGCSSPropertyNames.in:
* css/SVGCSSStyleSelector.cpp:
(WebCore::CSSStyleSelector::applySVGProperty):
* css/SVGCSSValueKeywords.in:

FontDescription stores the m_textRendering bit.
* platform/graphics/FontDescription.h:
(WebCore::FontDescription::FontDescription):
(WebCore::FontDescription::textRenderingMode):
(WebCore::FontDescription::setTextRenderingMode):
(WebCore::FontDescription::operator==):

We want to fall into the complex text rendering code path if 
kerning and ligatures have been enabled with this property.
* platform/graphics/FontFastPath.cpp:
(WebCore::Font::canUseGlyphCache):

Now takes a TextRenderingMode as a parameter.
* platform/graphics/SimpleFontData.h:

New header for the enum.
* platform/graphics/TextRenderingMode.h: Added.
(WebCore::):

getCFStringAttributes() now takes a TextRenderingMode as an 
attribute.
* platform/graphics/mac/CoreTextController.cpp:
(WebCore::CoreTextController::collectCoreTextRunsForCharacters):

Enable kerning and ligatures whenever the TextRenderingMode is 
OptimizeLegibility or GeometricPrecision
* platform/graphics/mac/FontMacATSUI.mm:
(WebCore::disableLigatures):
(WebCore::initializeATSUStyle):
(WebCore::ATSULayoutParameters::initialize):
* platform/graphics/mac/SimpleFontDataMac.mm:
(WebCore::SimpleFontData::getCFStringAttributes):

More SVG CSS stuff that isn't needed anymore since SVG will use the 
new HTML CSS implementation.
* rendering/style/SVGRenderStyle.h:
(WebCore::SVGRenderStyle::InheritedFlags::operator==):
(WebCore::SVGRenderStyle::setBitDefaults):
* rendering/style/SVGRenderStyleDefs.h:

LayoutTests: Tests for <rdar://problem/6934421> Support CSS for Text Kerning and 
ligature
-and corresponding-
https://bugs.webkit.org/show_bug.cgi?id=6136

Reviewed by Dave Hyatt.

New tests.
* fast/css/parsing-text-rendering-expected.txt: Added.
* fast/css/parsing-text-rendering.html: Added.
* fast/css/resources/parsing-text-rendering.js: Added.
(test):
* fast/css/text-rendering.html: Added.
* platform/mac/fast/css/text-rendering-expected.checksum: Added.
* platform/mac/fast/css/text-rendering-expected.png: Added.
* platform/mac/fast/css/text-rendering-expected.txt: Added.

New and improved results.
* platform/mac/fast/css/getComputedStyle/computed-style-expected.txt:
* platform/mac/fast/css/getComputedStyle/computed-style-without-renderer-expected.txt:
* platform/mac/svg/W3C-SVG-1.1/filters-conv-01-f-expected.checksum:
* platform/mac/svg/W3C-SVG-1.1/filters-conv-01-f-expected.png:
* platform/mac/svg/W3C-SVG-1.1/filters-conv-01-f-expected.txt:
* svg/css/getComputedStyle-basic-expected.txt:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@48989 268f45cc-cd09-0410-ab3c-d52691b4dbfc