/* * 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 "GlyphBuffer.h" #import "GraphicsContext.h" #import "Logging.h" #import "SimpleFontData.h" #import "WebCoreSystemInterface.h" #import "WebCoreTextRenderer.h" #import "WKGraphics.h" #import <GraphicsServices/GraphicsServices.h> #import "WAKView.h" #import "BitmapImage.h" #import <wtf/StdLibExtras.h> #import <wtf/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 PassRefPtr<Image> smileImage(int imageNumber) { typedef HashMap<int, RefPtr<Image> > EmojiCacheMap; DEFINE_STATIC_LOCAL(EmojiCacheMap, emojiCache, ()); if (emojiCache.contains(imageNumber)) return emojiCache.get(imageNumber).get(); char name[30]; snprintf(name, 29, "%c%c%c%c%c-%04X", 101, 109, 111, 106, 105, imageNumber); NSBundle *bundle = [NSBundle bundleForClass:[WAKView class]]; NSString *imagePath = [bundle pathForResource:[NSString stringWithUTF8String:name] ofType:@"png"]; NSData *namedImageData = [NSData dataWithContentsOfFile:imagePath]; if (namedImageData) { RefPtr<Image> image = BitmapImage::create(); image->setData(SharedBuffer::wrapNSData(namedImageData), true); if (emojiCache.size() > EMOJI_CACHE_SIZE) emojiCache.clear(); //primitive mechanism. LRU would be better. <rdar://problem/6265136> make emoji cache LRU emojiCache.add(imageNumber, image); return image.release(); } return 0; } void Font::drawGlyphs(GraphicsContext* context, const SimpleFontData* font, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point, bool /*setColor*/) const { CGContextRef cgContext = WKGetCurrentGraphicsContext(); if (font->isImageFont()) { if (!context->emojiDrawingEnabled()) return; float advance = 0; DEFINE_STATIC_LOCAL(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 * 0.35f - 10); else dstRect.setY(point.y() - font->m_font.m_size); RefPtr<Image> image = smileImage(glyph); if (image) context->drawImage(image.get(), 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 iPhone. 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); IntSize shadowSize; int shadowBlur; Color shadowColor; context->getShadow(shadowSize, shadowBlur, shadowColor); bool hasSimpleShadow = context->textDrawingMode() == cTextFill && shadowColor.isValid() && !shadowBlur; if (hasSimpleShadow) { // Paint simple shadows ourselves instead of relying on CG shadows, to avoid losing subpixel antialiasing. context->clearShadow(); Color fillColor = context->fillColor(); Color shadowFillColor(shadowColor.red(), shadowColor.green(), shadowColor.blue(), shadowColor.alpha() * fillColor.alpha() / 255); context->setFillColor(shadowFillColor); CGContextSetTextPosition(cgContext, point.x() + shadowSize.width(), point.y() + shadowSize.height()); CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), glyphBuffer.advances(from), numGlyphs); if (font->m_syntheticBoldOffset) { CGContextSetTextPosition(cgContext, point.x() + shadowSize.width() + font->m_syntheticBoldOffset, point.y() + shadowSize.height()); CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), glyphBuffer.advances(from), numGlyphs); } context->setFillColor(fillColor); } 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 (hasSimpleShadow) context->setShadow(shadowSize, shadowBlur, shadowColor); if (originalShouldUseFontSmoothing != newShouldUseFontSmoothing) CGContextSetShouldSmoothFonts(cgContext, originalShouldUseFontSmoothing); #if !PLATFORM(IPHONE_SIMULATOR) if (newShouldUseFontSmoothing && fontSmoothingStyle != originalFontSmoothingStyle) CGContextSetFontSmoothingStyle(cgContext, originalFontSmoothingStyle); if (fontAntialiasingStyle != originalFontAntialiasingStyle) CGContextSetFontAntialiasingStyle(cgContext, originalFontAntialiasingStyle); #endif } }