WebKitGraphics.cpp [plain text]
#include "config.h"
#include "WebKitGraphics.h"
#include "WebKit.h"
#include "WebKitDLL.h"
#include "WebPreferences.h"
#include <WebCore/Font.h>
#include <WebCore/FontCache.h>
#include <WebCore/FontDescription.h>
#include <WebCore/FontSelector.h>
#include <WebCore/GraphicsContext.h>
#include <WebCore/StringTruncator.h>
#include <WebCore/WebCoreTextRenderer.h>
#include <wtf/text/WTFString.h>
#include <wtf/unicode/CharacterNames.h>
#include <CoreGraphics/CoreGraphics.h>
#include <WebKitSystemInterface/WebKitSystemInterface.h>
using namespace WebCore;
static Font makeFont(const WebFontDescription& description)
{
AtomicString::init();
String fontFamilyString(description.family, description.familyLength);
FontDescription f;
f.setOneFamily(fontFamilyString);
f.setSpecifiedSize(description.size);
f.setComputedSize(description.size);
f.setItalic(description.italic);
f.setWeight(description.bold ? FontWeightBold : FontWeightNormal);
f.setIsAbsoluteSize(true);
FontSmoothingType smoothingType;
if (SUCCEEDED(WebPreferences::sharedStandardPreferences()->fontSmoothing(&smoothingType)))
f.setRenderingMode(smoothingType == FontSmoothingTypeWindows ? AlternateRenderingMode : NormalRenderingMode);
Font font(f, 0, 0);
font.update(0);
return font;
}
struct WebTextRenderInfoWithoutShadow
{
DWORD structSize;
CGContextRef cgContext;
LPCTSTR text;
int length;
POINT pt;
const WebFontDescription* description;
CGColorRef color;
int underlinedIndex;
bool drawAsPassword;
int overrideSmoothingLevel; };
void WebDrawText(WebTextRenderInfo* info)
{
if (!info || info->structSize < sizeof(WebTextRenderInfoWithoutShadow) || !info->cgContext || !info->description)
return;
int oldFontSmoothingLevel = -1;
if (info->overrideSmoothingLevel >= 0) {
oldFontSmoothingLevel = wkGetFontSmoothingLevel();
wkSetFontSmoothingLevel(info->overrideSmoothingLevel);
}
{
GraphicsContext context(info->cgContext);
String drawString(info->text, info->length);
if (info->drawAsPassword)
drawString.fill(WTF::Unicode::bullet);
context.save();
if (info->structSize == sizeof(WebTextRenderInfo) &&
(info->shadowOffset.cx || info->shadowOffset.cy || info->shadowBlur || info->shadowColor))
context.setShadow(FloatSize(info->shadowOffset.cx, info->shadowOffset.cy), info->shadowBlur, info->shadowColor, ColorSpaceDeviceRGB);
WebCoreDrawTextAtPoint(context, drawString, info->pt, makeFont(*(info->description)), info->color, info->underlinedIndex);
context.restore();
}
if (info->overrideSmoothingLevel >= 0)
wkSetFontSmoothingLevel(oldFontSmoothingLevel);
}
float TextFloatWidth(LPCTSTR text, int length, const WebFontDescription& description)
{
return WebCoreTextFloatWidth(String(text, length), makeFont(description));
}
void FontMetrics(const WebFontDescription& description, int* ascent, int* descent, int* lineSpacing)
{
if (!ascent && !descent && !lineSpacing)
return;
Font font(makeFont(description));
const WebCore::FontMetrics& fontMetrics(font.fontMetrics());
if (ascent)
*ascent = fontMetrics.ascent();
if (descent)
*descent = fontMetrics.descent();
if (lineSpacing)
*lineSpacing = fontMetrics.lineSpacing();
}
unsigned CenterTruncateStringToWidth(LPCTSTR text, int length, const WebFontDescription& description, float width, WCHAR* buffer)
{
ASSERT(buffer);
FontCachePurgePreventer fontCachePurgePreventer;
String result = StringTruncator::centerTruncate(String(text, length), width, makeFont(description), StringTruncator::EnableRoundingHacks);
memcpy(buffer, result.characters(), result.length() * sizeof(UChar));
buffer[result.length()] = '\0';
return result.length();
}
unsigned RightTruncateStringToWidth(LPCTSTR text, int length, const WebFontDescription& description, float width, WCHAR* buffer)
{
ASSERT(buffer);
FontCachePurgePreventer fontCachePurgePreventer;
String result = StringTruncator::rightTruncate(String(text, length), width, makeFont(description), StringTruncator::EnableRoundingHacks);
memcpy(buffer, result.characters(), result.length() * sizeof(UChar));
buffer[result.length()] = '\0';
return result.length();
}
void WebKitSetShouldUseFontSmoothing(bool smooth)
{
WebCoreSetShouldUseFontSmoothing(smooth);
}
bool WebKitShouldUseFontSmoothing()
{
return WebCoreShouldUseFontSmoothing();
}