author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 24 Sep 2009 12:53:48 +0300 | |
changeset 11 | c8a366e56285 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2006, 2007 Apple Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "Font.h" |
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#include "FontData.h" |
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#include "FontFallbackList.h" |
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#include "GlyphBuffer.h" |
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#include "GraphicsContext.h" |
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#include "IntRect.h" |
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#include "NotImplemented.h" |
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#include "TextStyle.h" |
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#include "UniscribeController.h" |
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#include <ApplicationServices/ApplicationServices.h> |
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#include <WebKitSystemInterface/WebKitSystemInterface.h> |
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#include <wtf/MathExtras.h> |
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namespace WebCore { |
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const int syntheticObliqueAngle = 14; |
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void Font::drawGlyphs(GraphicsContext* graphicsContext, const FontData* font, const GlyphBuffer& glyphBuffer, |
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int from, int numGlyphs, const FloatPoint& point) const |
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{ |
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CGContextRef cgContext = graphicsContext->platformContext(); |
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uint32_t oldFontSmoothingStyle = wkSetFontSmoothingStyle(cgContext); |
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const FontPlatformData& platformData = font->platformData(); |
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//NSFont* drawFont; |
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//if ([gContext isDrawingToScreen]) { |
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// drawFont = [platformData.font screenFont]; |
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// if (drawFont != platformData.font) |
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// // We are getting this in too many places (3406411); use ERROR so it only prints on debug versions for now. (We should debug this also, eventually). |
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// LOG_ERROR("Attempting to set non-screen font (%@) when drawing to screen. Using screen font anyway, may result in incorrect metrics.", |
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// [[[platformData.font fontDescriptor] fontAttributes] objectForKey:NSFontNameAttribute]); |
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//} else { |
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// drawFont = [platformData.font printerFont]; |
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// if (drawFont != platformData.font) |
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// NSLog(@"Attempting to set non-printer font (%@) when printing. Using printer font anyway, may result in incorrect metrics.", |
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// [[[platformData.font fontDescriptor] fontAttributes] objectForKey:NSFontNameAttribute]); |
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//} |
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CGContextSetFont(cgContext, platformData.cgFont()); |
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CGAffineTransform matrix = CGAffineTransformIdentity; |
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matrix.b = -matrix.b; |
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matrix.d = -matrix.d; |
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if (platformData.syntheticOblique()) |
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{ |
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static float skew = -tanf(syntheticObliqueAngle * acosf(0) / 90); |
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matrix = CGAffineTransformConcat(matrix, CGAffineTransformMake(1, 0, skew, 1, 0, 0)); |
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} |
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// Uniscribe gives us offsets to help refine the positioning of combining glyphs. |
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FloatSize translation = glyphBuffer.offsetAt(from); |
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if (translation.width() || translation.height()) |
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CGAffineTransformTranslate(matrix, translation.width(), translation.height()); |
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CGContextSetTextMatrix(cgContext, matrix); |
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//wkSetCGFontRenderingMode(cgContext, drawFont); |
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CGContextSetFontSize(cgContext, platformData.size()); |
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CGContextSetTextPosition(cgContext, point.x(), point.y()); |
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CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), glyphBuffer.advances(from), numGlyphs); |
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if (font->m_syntheticBoldOffset) { |
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CGContextSetTextPosition(cgContext, point.x() + font->m_syntheticBoldOffset, point.y()); |
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CGContextShowGlyphsWithAdvances(cgContext, glyphBuffer.glyphs(from), glyphBuffer.advances(from), numGlyphs); |
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} |
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wkRestoreFontSmoothingStyle(cgContext, oldFontSmoothingStyle); |
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} |
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FloatRect Font::selectionRectForComplexText(const TextRun& run, const TextStyle& style, const IntPoint& point, int h, |
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int from, int to) const |
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{ |
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UniscribeController it(this, run, style); |
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it.advance(from); |
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float beforeWidth = it.runWidthSoFar(); |
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it.advance(to); |
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float afterWidth = it.runWidthSoFar(); |
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|
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// Using roundf() rather than ceilf() for the right edge as a compromise to ensure correct caret positioning |
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if (style.rtl()) { |
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it.advance(run.length()); |
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float totalWidth = it.runWidthSoFar(); |
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return FloatRect(point.x() + floorf(totalWidth - afterWidth), point.y(), roundf(totalWidth - beforeWidth) - floorf(totalWidth - afterWidth), h); |
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} |
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113 |
|
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return FloatRect(point.x() + floorf(beforeWidth), point.y(), roundf(afterWidth) - floorf(beforeWidth), h); |
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} |
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void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const TextStyle& style, const FloatPoint& point, |
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int from, int to) const |
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{ |
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// This glyph buffer holds our glyphs + advances + font data for each glyph. |
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GlyphBuffer glyphBuffer; |
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|
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float startX = point.x(); |
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UniscribeController controller(this, run, style); |
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controller.advance(from); |
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float beforeWidth = controller.runWidthSoFar(); |
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controller.advance(to, &glyphBuffer); |
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// We couldn't generate any glyphs for the run. Give up. |
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if (glyphBuffer.isEmpty()) |
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return; |
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float afterWidth = controller.runWidthSoFar(); |
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|
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if (style.rtl()) { |
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controller.advance(run.length()); |
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startX += controller.runWidthSoFar() - afterWidth; |
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} else |
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startX += beforeWidth; |
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// Draw the glyph buffer now at the starting point returned in startX. |
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FloatPoint startPoint(startX, point.y()); |
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drawGlyphBuffer(context, glyphBuffer, run, style, startPoint); |
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} |
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|
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float Font::floatWidthForComplexText(const TextRun& run, const TextStyle& style) const |
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{ |
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UniscribeController controller(this, run, style); |
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controller.advance(run.length()); |
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return controller.runWidthSoFar(); |
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} |
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int Font::offsetForPositionForComplexText(const TextRun& run, const TextStyle& style, int x, bool includePartialGlyphs) const |
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{ |
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UniscribeController controller(this, run, style); |
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return controller.offsetForPosition(x, includePartialGlyphs); |
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} |
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} |