| /* |
| * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "Font.h" |
| |
| #include "GlyphBuffer.h" |
| #include "GraphicsContext.h" |
| #include "IntRect.h" |
| #include "SimpleFontData.h" |
| #include "UniscribeController.h" |
| #include "WebCoreTextRenderer.h" |
| #include <ApplicationServices/ApplicationServices.h> |
| #include <WebKitSystemInterface/WebKitSystemInterface.h> |
| #include <wtf/MathExtras.h> |
| |
| namespace WebCore { |
| |
| const int syntheticObliqueAngle = 14; |
| |
| void Font::drawGlyphs(GraphicsContext* graphicsContext, const SimpleFontData* font, const GlyphBuffer& glyphBuffer, |
| int from, int numGlyphs, const FloatPoint& point) const |
| { |
| if (font->m_font.useGDI()) { |
| // FIXME: Support alpha blending. |
| // FIXME: Support text stroke/fill. |
| // FIXME: Support text shadow. |
| Color fillColor = graphicsContext->fillColor(); |
| if (fillColor.alpha() == 0) |
| return; |
| |
| // We have to convert CG's two-dimensional floating point advances to just horizontal integer advances. |
| Vector<int, 2048> gdiAdvances; |
| int totalWidth = 0; |
| for (int i = 0; i < numGlyphs; i++) { |
| gdiAdvances.append(lroundf(glyphBuffer.advanceAt(from + i))); |
| totalWidth += gdiAdvances[i]; |
| } |
| |
| // We put slop into this rect, since glyphs can overflow the ascent/descent bounds and the left/right edges. |
| int lineGap = font->lineGap(); |
| IntRect textRect(point.x() - lineGap, point.y() - font->ascent() - lineGap, totalWidth + 2 * lineGap, font->lineSpacing()); |
| HDC hdc = graphicsContext->getWindowsContext(textRect); |
| SelectObject(hdc, font->m_font.hfont()); |
| |
| // Set the correct color. |
| HDC textDrawingDC = hdc; |
| SetTextColor(hdc, RGB(fillColor.red(), fillColor.green(), fillColor.blue())); |
| |
| SetBkMode(hdc, TRANSPARENT); |
| SetTextAlign(hdc, TA_LEFT | TA_BASELINE); |
| |
| // Uniscribe gives us offsets to help refine the positioning of combining glyphs. |
| FloatSize translation = glyphBuffer.offsetAt(from); |
| if (translation.width() || translation.height()) { |
| XFORM xform; |
| xform.eM11 = 1.0; |
| xform.eM12 = 0; |
| xform.eM21 = 0; |
| xform.eM22 = 1.0; |
| xform.eDx = translation.width(); |
| xform.eDy = translation.height(); |
| ModifyWorldTransform(hdc, &xform, MWT_LEFTMULTIPLY); |
| } |
| ExtTextOut(hdc, point.x(), point.y(), ETO_GLYPH_INDEX, 0, (WCHAR*)glyphBuffer.glyphs(from), numGlyphs, gdiAdvances.data()); |
| |
| graphicsContext->releaseWindowsContext(hdc, textRect); |
| return; |
| } |
| |
| CGContextRef cgContext = graphicsContext->platformContext(); |
| |
| uint32_t oldFontSmoothingStyle = wkSetFontSmoothingStyle(cgContext, WebCoreShouldUseFontSmoothing()); |
| |
| const FontPlatformData& platformData = font->platformData(); |
| |
| CGContextSetFont(cgContext, platformData.cgFont()); |
| |
| CGAffineTransform matrix = CGAffineTransformIdentity; |
| matrix.b = -matrix.b; |
| matrix.d = -matrix.d; |
| |
| if (platformData.syntheticOblique()) { |
| static float skew = -tanf(syntheticObliqueAngle * acosf(0) / 90.0f); |
| matrix = CGAffineTransformConcat(matrix, CGAffineTransformMake(1, 0, skew, 1, 0, 0)); |
| } |
| |
| // Uniscribe gives us offsets to help refine the positioning of combining glyphs. |
| FloatSize translation = glyphBuffer.offsetAt(from); |
| if (translation.width() || translation.height()) |
| CGAffineTransformTranslate(matrix, translation.width(), translation.height()); |
| |
| CGContextSetTextMatrix(cgContext, matrix); |
| |
| CGContextSetFontSize(cgContext, platformData.size()); |
| 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); |
| } |
| |
| wkRestoreFontSmoothingStyle(cgContext, oldFontSmoothingStyle); |
| } |
| |
| } |