gecko-dev/gfx/thebes/gfxGDIFont.h
Nicholas Nethercote 06e901cb9f Bug 1231550 - Use DrawTarget instead of gfxContext and/or nsRenderingContext in many places in font/text code. r=jfkthame.
AutoTextRun now only needs a DrawTarget instead of an nsRenderingContext, and
similar nsRenderingContext/gfxContext-to-DrawTarget replacements can be
propagated a long way up the call graph. This patch replaces 93 occurrences of
nsRenderingContext and 135 occurrences of gfxContext with DrawTarget; that's
13% of them.

The patch is mostly plumbing changes. A couple of not-entirely-plumbing
changes:

- It adds a comment about the null check in
  gfxGlyphExtents::GetTightGlyphExtentsAppUnits().

- A couple of functions simply had an unused gfxContext or nsRenderingContext
  parameter removed, e.g. SetLineBreaks().

--HG--
extra : rebase_source : 8f56994bb4d254a86788b17ab2864ebc758a7e6b
2015-12-15 13:56:41 -08:00

117 lines
4.1 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef GFX_GDIFONT_H
#define GFX_GDIFONT_H
#include "mozilla/MemoryReporting.h"
#include "gfxFont.h"
#include "gfxGDIFontList.h"
#include "nsDataHashtable.h"
#include "nsHashKeys.h"
#include "cairo.h"
#include "usp10.h"
class gfxGDIFont : public gfxFont
{
public:
gfxGDIFont(GDIFontEntry *aFontEntry,
const gfxFontStyle *aFontStyle,
bool aNeedsBold,
AntialiasOption anAAOption = kAntialiasDefault);
virtual ~gfxGDIFont();
HFONT GetHFONT() { if (!mMetrics) Initialize(); return mFont; }
virtual gfxFloat GetAdjustedSize()
{
if (!mMetrics) {
Initialize();
}
return mAdjustedSize;
}
cairo_font_face_t *CairoFontFace() { return mFontFace; }
cairo_scaled_font_t *CairoScaledFont() { return mScaledFont; }
/* overrides for the pure virtual methods in gfxFont */
virtual uint32_t GetSpaceGlyph() override;
virtual bool SetupCairoFont(DrawTarget* aDrawTarget) override;
/* override Measure to add padding for antialiasing */
virtual RunMetrics Measure(gfxTextRun *aTextRun,
uint32_t aStart, uint32_t aEnd,
BoundingBoxType aBoundingBoxType,
DrawTarget *aDrawTargetForTightBoundingBox,
Spacing *aSpacing,
uint16_t aOrientation) override;
/* required for MathML to suppress effects of ClearType "padding" */
virtual gfxFont*
CopyWithAntialiasOption(AntialiasOption anAAOption) override;
// If the font has a cmap table, we handle it purely with harfbuzz;
// but if not (e.g. .fon fonts), we'll use a GDI callback to get glyphs.
virtual bool ProvidesGetGlyph() const override {
return !mFontEntry->HasCmapTable();
}
virtual uint32_t GetGlyph(uint32_t aUnicode,
uint32_t aVarSelector) override;
virtual bool ProvidesGlyphWidths() const override { return true; }
// get hinted glyph width in pixels as 16.16 fixed-point value
virtual int32_t GetGlyphWidth(DrawTarget& aDrawTarget,
uint16_t aGID) override;
virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual FontType GetType() const override { return FONT_TYPE_GDI; }
protected:
virtual const Metrics& GetHorizontalMetrics() override;
/* override to ensure the cairo font is set up properly */
virtual bool ShapeText(DrawTarget *aDrawTarget,
const char16_t *aText,
uint32_t aOffset,
uint32_t aLength,
int32_t aScript,
bool aVertical,
gfxShapedText *aShapedText) override;
void Initialize(); // creates metrics and Cairo fonts
// Fill the given LOGFONT record according to our style, but don't adjust
// the lfItalic field if we're going to use a cairo transform for fake
// italics.
void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize, bool aUseGDIFakeItalic);
HFONT mFont;
cairo_font_face_t *mFontFace;
Metrics *mMetrics;
uint32_t mSpaceGlyph;
bool mNeedsBold;
// cache of glyph IDs (used for non-sfnt fonts only)
nsAutoPtr<nsDataHashtable<nsUint32HashKey,uint32_t> > mGlyphIDs;
SCRIPT_CACHE mScriptCache;
// cache of glyph widths in 16.16 fixed-point pixels
nsAutoPtr<nsDataHashtable<nsUint32HashKey,int32_t> > mGlyphWidths;
};
#endif /* GFX_GDIFONT_H */