external/webkit r30707

1 files changed, 127 insertions, 0 deletions

diff --git a/WebCore/platform/graphics/win/FontCGWin.cpp b/WebCore/platform/graphics/win/FontCGWin.cpp
new file mode 100644
index 0000000..8b59a48
--- /dev/null
+++ b/WebCore/platform/graphics/win/FontCGWin.cpp
@@ -0,0 +1,127 @@
+/*
+ * 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 <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);
+
+    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);
+}
+
+}