/**
* This file is part of the html renderer for KDE.
*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2006 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#import "config.h"
#import "Font.h"
#import "BlockExceptions.h"
#import "CharacterNames.h"
#import "FontFallbackList.h"
#import "GlyphBuffer.h"
#import "GraphicsContext.h"
#import "IntRect.h"
#import "Logging.h"
#import "ShapeArabic.h"
#import "SimpleFontData.h"
#import "WebCoreSystemInterface.h"
#import "WebCoreTextRenderer.h"
#import "WKGraphics.h"
#import <GraphicsServices/GraphicsServices.h>
#import "WebCoreFrameBridge.h"
#import "BitmapImage.h"
#import "Threading.h"
#define SYNTHETIC_OBLIQUE_ANGLE 14
#ifdef __LP64__
#define URefCon void*
#else
#define URefCon UInt32
#endif
using namespace std;
namespace WebCore {
// 1600 bytes each (20 x 20 x 4 bytes pp), so 50 emoji is only ~80k.
#define EMOJI_CACHE_SIZE 50
static Image* smileImage(int imageNumber)
{
static HashMap<int,Image*> emojiCache;
if (emojiCache.contains(imageNumber))
return emojiCache.get(imageNumber);
char name[30];
snprintf(name, 29, "%c%c%c%c%c-%04X", 101, 109, 111, 106, 105, imageNumber);
NSBundle *bundle = [NSBundle bundleForClass:[WebCoreFrameBridge class]];
NSString *imagePath = [bundle pathForResource:[NSString stringWithUTF8String:name] ofType:@"png"];
NSData *namedImageData = [NSData dataWithContentsOfFile:imagePath];
if (namedImageData) {
Image *image = new BitmapImage;
image->setData(SharedBuffer::wrapNSData(namedImageData), true);
if (emojiCache.size() > EMOJI_CACHE_SIZE) {
deleteAllValues(emojiCache);
emojiCache.clear(); //primitive mechanism. LRU would be better. <rdar://problem/6265136> make emoji cache LRU
}
emojiCache.add(imageNumber, image);
return image;
}
return 0;
}
void Font::drawGlyphs(GraphicsContext* context, const SimpleFontData* font, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point) const
{
CGContextRef cgContext = WKGetCurrentGraphicsContext();
if (font->isImageFont()) {
if (!context->emojiDrawingEnabled())
return;
float advance = 0;
static Mutex emojiMutex;
MutexLocker locker(emojiMutex);
for (int i = from; i < from + numGlyphs; i++) {
const Glyph glyph = glyphBuffer.glyphAt(i);
const int pointSize = font->m_font.m_size;
const int imageGlyphSize = std::min(pointSize + (pointSize <= 15 ? 2 : 4), 20); // scale images below 16 pt.
IntRect dstRect;
dstRect.setWidth(imageGlyphSize);
dstRect.setHeight(imageGlyphSize);
dstRect.setX(point.x() + 1 + advance);
// these magic rules place the image glyph vertically as per HI specifications.
if (font->m_font.m_size >= 26)
dstRect.setY(point.y() - 20);
else if (font->m_font.m_size >= 16)
dstRect.setY(point.y() - font->m_font.m_size * 0.35 - 10);
else
dstRect.setY(point.y() - font->m_font.m_size);
Image *image = smileImage(glyph);
if (image)
context->drawImage(image, dstRect);
advance += glyphBuffer.advanceAt(i);
}
return;
}
bool originalShouldUseFontSmoothing = CGContextGetShouldSmoothFonts(cgContext);
bool newShouldUseFontSmoothing = WebCoreShouldUseFontSmoothing();
if (originalShouldUseFontSmoothing != newShouldUseFontSmoothing)
CGContextSetShouldSmoothFonts(cgContext, newShouldUseFontSmoothing);
#if !PLATFORM(IPHONE_SIMULATOR)
// Font smoothing style
CGFontSmoothingStyle originalFontSmoothingStyle = CGContextGetFontSmoothingStyle(cgContext);
CGFontSmoothingStyle fontSmoothingStyle = WebCoreFontSmoothingStyle();
if (newShouldUseFontSmoothing && fontSmoothingStyle != originalFontSmoothingStyle)
CGContextSetFontSmoothingStyle(cgContext, fontSmoothingStyle);
// Font antialiasing style
CGFontAntialiasingStyle originalFontAntialiasingStyle = CGContextGetFontAntialiasingStyle(cgContext);
CGFontAntialiasingStyle fontAntialiasingStyle = WebCoreFontAntialiasingStyle();
if (fontAntialiasingStyle != originalFontAntialiasingStyle)
CGContextSetFontAntialiasingStyle(cgContext, fontAntialiasingStyle);
#endif
const FontPlatformData& platformData = font->platformData();
GSFontSetFont(cgContext, platformData.font());
float fontSize = GSFontGetSize(platformData.font());
CGAffineTransform matrix = CGAffineTransformMakeScale(fontSize, fontSize);
// Always flipped on Purple.
matrix.b = -matrix.b;
matrix.d = -matrix.d;
if (platformData.m_syntheticOblique)
matrix = CGAffineTransformConcat(matrix, CGAffineTransformMake(1, 0, -tanf(SYNTHETIC_OBLIQUE_ANGLE * acosf(0) / 90), 1, 0, 0));
CGContextSetTextMatrix(cgContext, matrix);
CGContextSetFontSize(cgContext, 1.0f);
CGContextSetTextPosition(cgContext, point.x(), point.y());
CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), glyphBuffer.advances(from), numGlyphs);
if (font->m_syntheticBoldOffset) {
CGContextSetTextPosition(cgContext, point.x() + font->m_syntheticBoldOffset, point.y());
CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), glyphBuffer.advances(from), numGlyphs);
}
if (originalShouldUseFontSmoothing != newShouldUseFontSmoothing)
CGContextSetShouldSmoothFonts(cgContext, originalShouldUseFontSmoothing);
#if !PLATFORM(IPHONE_SIMULATOR)
if (newShouldUseFontSmoothing && fontSmoothingStyle != originalFontSmoothingStyle)
CGContextSetFontSmoothingStyle(cgContext, originalFontSmoothingStyle);
if (fontAntialiasingStyle != originalFontAntialiasingStyle)
CGContextSetFontAntialiasingStyle(cgContext, originalFontAntialiasingStyle);
#endif
}
}