mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
300 lines
9.5 KiB
C++
300 lines
9.5 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is Mozilla Foundation code.
|
|
*
|
|
* The Initial Developer of the Original Code is the Mozilla Foundation
|
|
* Portions created by the Initial Developer are Copyright (C) 2011
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Edwin Flores <eflores@mozilla.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef GFX_SVG_GLYPHS_WRAPPER_H
|
|
#define GFX_SVG_GLYPHS_WRAPPER_H
|
|
|
|
#include "gfxFontUtils.h"
|
|
#include "nsString.h"
|
|
#include "nsIDocument.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsIContentViewer.h"
|
|
#include "nsIPresShell.h"
|
|
#include "nsClassHashtable.h"
|
|
#include "nsBaseHashtable.h"
|
|
#include "nsHashKeys.h"
|
|
#include "gfxPattern.h"
|
|
#include "gfxFont.h"
|
|
#include "mozilla/gfx/UserData.h"
|
|
|
|
|
|
/**
|
|
* Wraps an SVG document contained in the SVG table of an OpenType font.
|
|
* There may be multiple SVG documents in an SVG table which we lazily parse
|
|
* so we have an instance of this class for every document in the SVG table
|
|
* which contains a glyph ID which has been used
|
|
* Finds and looks up elements contained in the SVG document which have glyph
|
|
* mappings to be drawn by gfxSVGGlyphs
|
|
*/
|
|
class gfxSVGGlyphsDocument
|
|
{
|
|
typedef mozilla::dom::Element Element;
|
|
typedef gfxFont::DrawMode DrawMode;
|
|
|
|
public:
|
|
gfxSVGGlyphsDocument(uint8_t *aBuffer, uint32_t aBufLen,
|
|
const FallibleTArray<uint8_t>& aCmapTable);
|
|
|
|
Element *GetGlyphElement(uint32_t aGlyphId);
|
|
|
|
~gfxSVGGlyphsDocument() {
|
|
if (mViewer) {
|
|
mViewer->Destroy();
|
|
}
|
|
}
|
|
|
|
private:
|
|
nsresult ParseDocument(uint8_t *aBuffer, uint32_t aBufLen);
|
|
|
|
nsresult SetupPresentation();
|
|
|
|
void FindGlyphElements(Element *aElement,
|
|
const FallibleTArray<uint8_t> &aCmapTable);
|
|
|
|
void InsertGlyphId(Element *aGlyphElement);
|
|
void InsertGlyphChar(Element *aGlyphElement,
|
|
const FallibleTArray<uint8_t> &aCmapTable);
|
|
|
|
nsCOMPtr<nsIDocument> mDocument;
|
|
nsCOMPtr<nsIContentViewer> mViewer;
|
|
nsCOMPtr<nsIPresShell> mPresShell;
|
|
|
|
nsBaseHashtable<nsUint32HashKey, Element*, Element*> mGlyphIdMap;
|
|
};
|
|
|
|
/**
|
|
* Used by |gfxFontEntry| to represent the SVG table of an OpenType font.
|
|
* Handles lazy parsing of the SVG documents in the table, looking up SVG glyphs
|
|
* and rendering SVG glyphs.
|
|
* Each |gfxFontEntry| owns at most one |gfxSVGGlyphs| instance.
|
|
*/
|
|
class gfxSVGGlyphs
|
|
{
|
|
private:
|
|
typedef mozilla::dom::Element Element;
|
|
typedef gfxFont::DrawMode DrawMode;
|
|
|
|
public:
|
|
static const float SVG_UNITS_PER_EM;
|
|
|
|
/**
|
|
* @param aSVGTable The SVG table from the OpenType font
|
|
* @param aCmapTable The CMAP table from the OpenType font
|
|
*/
|
|
gfxSVGGlyphs(FallibleTArray<uint8_t>& aSVGTable,
|
|
const FallibleTArray<uint8_t>& aCmapTable);
|
|
|
|
/**
|
|
* Big- to little-endian conversion for headers
|
|
*/
|
|
void UnmangleHeaders();
|
|
|
|
/**
|
|
* Find the |gfxSVGGlyphsDocument| containing an SVG glyph for |aGlyphId|.
|
|
* If |aGlyphId| does not map to an SVG document, return null.
|
|
* If a |gfxSVGGlyphsDocument| has not been created for the document, create one.
|
|
*/
|
|
gfxSVGGlyphsDocument *FindOrCreateGlyphsDocument(uint32_t aGlyphId);
|
|
|
|
/**
|
|
* Return true iff there is an SVG glyph for |aGlyphId|
|
|
*/
|
|
bool HasSVGGlyph(uint32_t aGlyphId);
|
|
|
|
/**
|
|
* Render the SVG glyph for |aGlyphId|
|
|
* @param aDrawMode Whether to fill or stroke or both; see gfxFont::DrawMode
|
|
* @param aObjectPaint Information on outer text object paints.
|
|
* See |gfxTextObjectPaint|.
|
|
*/
|
|
bool RenderGlyph(gfxContext *aContext, uint32_t aGlyphId, DrawMode aDrawMode,
|
|
gfxTextObjectPaint *aObjectPaint);
|
|
|
|
/**
|
|
* Get the extents for the SVG glyph associated with |aGlyphId|
|
|
* @param aSVGToAppSpace The matrix mapping the SVG glyph space to the
|
|
* target context space
|
|
*/
|
|
bool GetGlyphExtents(uint32_t aGlyphId, const gfxMatrix& aSVGToAppSpace,
|
|
gfxRect *aResult);
|
|
|
|
private:
|
|
Element *GetGlyphElement(uint32_t aGlyphId);
|
|
|
|
nsClassHashtable<nsUint32HashKey, gfxSVGGlyphsDocument> mGlyphDocs;
|
|
nsBaseHashtable<nsUint32HashKey, Element*, Element*> mGlyphIdMap;
|
|
|
|
FallibleTArray<uint8_t> mSVGData;
|
|
FallibleTArray<uint8_t> mCmapData;
|
|
|
|
struct Header {
|
|
uint16_t mVersion;
|
|
uint16_t mIndexLength;
|
|
} *mHeader;
|
|
|
|
struct IndexEntry {
|
|
uint16_t mStartGlyph;
|
|
uint16_t mEndGlyph;
|
|
uint32_t mDocOffset;
|
|
uint32_t mDocLength;
|
|
} *mIndex;
|
|
|
|
static int CompareIndexEntries(const void *_a, const void *_b);
|
|
};
|
|
|
|
/**
|
|
* Used for trickling down paint information through to SVG glyphs.
|
|
* Will be extended in later patch.
|
|
*/
|
|
class gfxTextObjectPaint
|
|
{
|
|
protected:
|
|
gfxTextObjectPaint() { }
|
|
|
|
public:
|
|
static mozilla::gfx::UserDataKey sUserDataKey;
|
|
|
|
/*
|
|
* Get outer text object pattern with the specified opacity value.
|
|
* This lets us inherit paints and paint opacities (i.e. fill/stroke and
|
|
* fill-opacity/stroke-opacity) separately.
|
|
*/
|
|
virtual already_AddRefed<gfxPattern> GetFillPattern(float aOpacity,
|
|
const gfxMatrix& aCTM) = 0;
|
|
virtual already_AddRefed<gfxPattern> GetStrokePattern(float aOpacity,
|
|
const gfxMatrix& aCTM) = 0;
|
|
|
|
virtual float GetFillOpacity() { return 1.0f; }
|
|
virtual float GetStrokeOpacity() { return 1.0f; }
|
|
|
|
void InitStrokeGeometry(gfxContext *aContext,
|
|
float devUnitsPerSVGUnit);
|
|
|
|
FallibleTArray<gfxFloat>& GetStrokeDashArray() {
|
|
return mDashes;
|
|
}
|
|
|
|
gfxFloat GetStrokeDashOffset() {
|
|
return mDashOffset;
|
|
}
|
|
|
|
gfxFloat GetStrokeWidth() {
|
|
return mStrokeWidth;
|
|
}
|
|
|
|
already_AddRefed<gfxPattern> GetFillPattern(const gfxMatrix& aCTM) {
|
|
return GetFillPattern(GetFillOpacity(), aCTM);
|
|
}
|
|
|
|
already_AddRefed<gfxPattern> GetStrokePattern(const gfxMatrix& aCTM) {
|
|
return GetStrokePattern(GetStrokeOpacity(), aCTM);
|
|
}
|
|
|
|
virtual ~gfxTextObjectPaint() { }
|
|
|
|
private:
|
|
FallibleTArray<gfxFloat> mDashes;
|
|
gfxFloat mDashOffset;
|
|
gfxFloat mStrokeWidth;
|
|
};
|
|
|
|
/**
|
|
* For passing in patterns where the outer text object has no separate pattern
|
|
* opacity value.
|
|
*/
|
|
class SimpleTextObjectPaint : public gfxTextObjectPaint
|
|
{
|
|
private:
|
|
static const gfxRGBA sZero;
|
|
|
|
public:
|
|
static gfxMatrix SetupDeviceToPatternMatrix(gfxPattern *aPattern,
|
|
const gfxMatrix& aCTM)
|
|
{
|
|
if (!aPattern) {
|
|
return gfxMatrix();
|
|
}
|
|
gfxMatrix deviceToUser = aCTM;
|
|
deviceToUser.Invert();
|
|
return deviceToUser * aPattern->GetMatrix();
|
|
}
|
|
|
|
SimpleTextObjectPaint(gfxPattern *aFillPattern, gfxPattern *aStrokePattern,
|
|
const gfxMatrix& aCTM) :
|
|
mFillPattern(aFillPattern ? aFillPattern : new gfxPattern(sZero)),
|
|
mStrokePattern(aStrokePattern ? aStrokePattern : new gfxPattern(sZero))
|
|
{
|
|
mFillMatrix = SetupDeviceToPatternMatrix(aFillPattern, aCTM);
|
|
mStrokeMatrix = SetupDeviceToPatternMatrix(aStrokePattern, aCTM);
|
|
}
|
|
|
|
already_AddRefed<gfxPattern> GetFillPattern(float aOpacity,
|
|
const gfxMatrix& aCTM) {
|
|
if (mFillPattern) {
|
|
mFillPattern->SetMatrix(aCTM * mFillMatrix);
|
|
}
|
|
nsRefPtr<gfxPattern> fillPattern = mFillPattern;
|
|
return fillPattern.forget();
|
|
}
|
|
|
|
already_AddRefed<gfxPattern> GetStrokePattern(float aOpacity,
|
|
const gfxMatrix& aCTM) {
|
|
if (mStrokePattern) {
|
|
mStrokePattern->SetMatrix(aCTM * mStrokeMatrix);
|
|
}
|
|
nsRefPtr<gfxPattern> strokePattern = mStrokePattern;
|
|
return strokePattern.forget();
|
|
}
|
|
|
|
float GetFillOpacity() {
|
|
return mFillPattern ? 1.0f : 0.0f;
|
|
}
|
|
|
|
float GetStrokeOpacity() {
|
|
return mStrokePattern ? 1.0f : 0.0f;
|
|
}
|
|
|
|
private:
|
|
nsRefPtr<gfxPattern> mFillPattern;
|
|
nsRefPtr<gfxPattern> mStrokePattern;
|
|
|
|
// Device space to pattern space transforms
|
|
gfxMatrix mFillMatrix;
|
|
gfxMatrix mStrokeMatrix;
|
|
};
|
|
|
|
#endif
|