From 43d5a0757d857c2a6694ae81d6b70c04ef876aff Mon Sep 17 00:00:00 2001 From: Jiang Jiang Date: Tue, 7 Dec 2010 12:53:51 +0100 Subject: Fix boundingBox for raster engine with synthesized italic fonts We need to account for the extra right side bearing caused by text transform for synthesized italic. Task-number: QTBUG-14803 Reviewed-by: Eskil --- src/gui/text/qfontengine_coretext.mm | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/src/gui/text/qfontengine_coretext.mm b/src/gui/text/qfontengine_coretext.mm index dcc8329..2ae60b1 100644 --- a/src/gui/text/qfontengine_coretext.mm +++ b/src/gui/text/qfontengine_coretext.mm @@ -50,6 +50,8 @@ QT_BEGIN_NAMESPACE +static float SYNTHETIC_ITALIC_SKEW = tanf(14 * acosf(0) / 90); + QCoreTextFontEngineMulti::QCoreTextFontEngineMulti(const QCFString &name, const QFontDef &fontDef, bool kerning) : QFontEngineMulti(0) { @@ -396,6 +398,9 @@ glyph_metrics_t QCoreTextFontEngine::boundingBox(glyph_t glyph) glyph_metrics_t ret; CGGlyph g = glyph; CGRect rect = CTFontGetBoundingRectsForGlyphs(ctfont, kCTFontHorizontalOrientation, &g, 0, 1); + if (synthesisFlags & QFontEngine::SynthesizedItalic) { + rect.size.width += rect.size.height * SYNTHETIC_ITALIC_SKEW; + } ret.width = QFixed::fromReal(rect.size.width); ret.height = QFixed::fromReal(rect.size.height); ret.x = QFixed::fromReal(rect.origin.x); @@ -487,7 +492,7 @@ void QCoreTextFontEngine::draw(CGContextRef ctx, qreal x, qreal y, const QTextIt CGAffineTransformConcat(cgMatrix, oldTextMatrix); if (synthesisFlags & QFontEngine::SynthesizedItalic) - cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, -tanf(14 * acosf(0) / 90), 1, 0, 0)); + cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, -SYNTHETIC_ITALIC_SKEW, 1, 0, 0)); cgMatrix = CGAffineTransformConcat(cgMatrix, transform); @@ -570,13 +575,11 @@ static void convertCGPathToQPainterPath(void *info, const CGPathElement *element void QCoreTextFontEngine::addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nGlyphs, QPainterPath *path, QTextItem::RenderFlags) { - CGAffineTransform cgMatrix = CGAffineTransformIdentity; cgMatrix = CGAffineTransformScale(cgMatrix, 1, -1); if (synthesisFlags & QFontEngine::SynthesizedItalic) - cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, -tanf(14 * acosf(0) / 90), 1, 0, 0)); - + cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, -SYNTHETIC_ITALIC_SKEW, 1, 0, 0)); for (int i = 0; i < nGlyphs; ++i) { QCFType cgpath = CTFontCreatePathForGlyph(ctfont, glyphs[i], &cgMatrix); @@ -616,7 +619,7 @@ QImage QCoreTextFontEngine::imageForGlyph(glyph_t glyph, QFixed subPixelPosition CGAffineTransformConcat(cgMatrix, oldTextMatrix); if (synthesisFlags & QFontEngine::SynthesizedItalic) - cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, tanf(14 * acosf(0) / 90), 1, 0, 0)); + cgMatrix = CGAffineTransformConcat(cgMatrix, CGAffineTransformMake(1, 0, SYNTHETIC_ITALIC_SKEW, 1, 0, 0)); cgMatrix = CGAffineTransformConcat(cgMatrix, transform); -- cgit v0.12