privatize SkScalerContext.h

git-svn-id: http://skia.googlecode.com/svn/trunk@5096 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 0 insertions, 286 deletions

diff --git a/include/core/SkScalerContext.h b/include/core/SkScalerContext.h
deleted file mode 100644
index eee52a57e8..0000000000
--- a/include/core/SkScalerContext.h
+++ /dev/null
@@ -1,286 +0,0 @@
-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkScalerContext_DEFINED
-#define SkScalerContext_DEFINED
-
-#include "SkMask.h"
-#include "SkMaskGamma.h"
-#include "SkMatrix.h"
-#include "SkPaint.h"
-
-#ifdef SK_BUILD_FOR_ANDROID
-    //For SkFontID
-    #include "SkTypeface.h"
-#endif
-
-struct SkGlyph;
-class SkDescriptor;
-class SkMaskFilter;
-class SkPathEffect;
-class SkRasterizer;
-
-/*
- *  To allow this to be forward-declared, it must be its own typename, rather
- *  than a nested struct inside SkScalerContext (where it started).
- */
-struct SkScalerContextRec {
-    uint32_t    fOrigFontID;
-    uint32_t    fFontID;
-    SkScalar    fTextSize, fPreScaleX, fPreSkewX;
-    SkScalar    fPost2x2[2][2];
-    SkScalar    fFrameWidth, fMiterLimit;
-    
-    //These describe the parameters to create (uniquely identify) the pre-blend.
-    uint32_t    fLumBits;
-    uint8_t     fDeviceGamma; //2.6, (0.0, 4.0) gamma, 0.0 for sRGB
-    uint8_t     fPaintGamma;  //2.6, (0.0, 4.0) gamma, 0.0 for sRGB
-    uint8_t     fContrast;    //0.8+1, [0.0, 1.0] artificial contrast
-    uint8_t     fReservedAlign;
-    
-    SkScalar getDeviceGamma() const {
-        return SkIntToScalar(fDeviceGamma) / (1 << 6);
-    }
-    void setDeviceGamma(SkScalar dg) {
-        SkASSERT(0 <= dg && dg < SkIntToScalar(4));
-        fDeviceGamma = SkScalarFloorToInt(dg * (1 << 6));
-    }
-    
-    SkScalar getPaintGamma() const {
-        return SkIntToScalar(fPaintGamma) / (1 << 6);
-    }
-    void setPaintGamma(SkScalar pg) {
-        SkASSERT(0 <= pg && pg < SkIntToScalar(4));
-        fPaintGamma = SkScalarFloorToInt(pg * (1 << 6));
-    }
-    
-    SkScalar getContrast() const {
-        return SkIntToScalar(fContrast) / ((1 << 8) - 1);
-    }
-    void setContrast(SkScalar c) {
-        SkASSERT(0 <= c && c <= SK_Scalar1);
-        fContrast = SkScalarRoundToInt(c * ((1 << 8) - 1));
-    }
-    
-    /**
-     *  Causes the luminance color and contrast to be ignored, and the
-     *  paint and device gamma to be effectively 1.0.
-     */
-    void ignorePreBlend() {
-        setLuminanceColor(0x00000000);
-        setPaintGamma(SK_Scalar1);
-        setDeviceGamma(SK_Scalar1);
-        setContrast(0);
-    }
-    
-    uint8_t     fMaskFormat;
-    uint8_t     fStrokeJoin;
-    uint16_t    fFlags;
-    // Warning: when adding members note that the size of this structure
-    // must be a multiple of 4. SkDescriptor requires that its arguments be
-    // multiples of four and this structure is put in an SkDescriptor in
-    // SkPaint::MakeRec.
-    
-    void    getMatrixFrom2x2(SkMatrix*) const;
-    void    getLocalMatrix(SkMatrix*) const;
-    void    getSingleMatrix(SkMatrix*) const;
-    
-    inline SkPaint::Hinting getHinting() const;
-    inline void setHinting(SkPaint::Hinting);
-    
-    SkMask::Format getFormat() const {
-        return static_cast<SkMask::Format>(fMaskFormat);
-    }
-    
-    SkColor getLuminanceColor() const {
-        return fLumBits;
-    }
-    
-    void setLuminanceColor(SkColor c) {
-        fLumBits = c;
-    }
-};
-
-//The following typedef hides from the rest of the implementation the number of
-//most significant bits to consider when creating mask gamma tables. Two bits
-//per channel was chosen as a balance between fidelity (more bits) and cache
-//sizes (fewer bits).
-typedef SkTMaskGamma<2, 2, 2> SkMaskGamma;
-
-class SkScalerContext {
-public:
-    typedef SkScalerContextRec Rec;
-
-    enum Flags {
-        kFrameAndFill_Flag        = 0x0001,
-        kDevKernText_Flag         = 0x0002,
-        kEmbeddedBitmapText_Flag  = 0x0004,
-        kEmbolden_Flag            = 0x0008,
-        kSubpixelPositioning_Flag = 0x0010,
-        kAutohinting_Flag         = 0x0020,
-        kVertical_Flag            = 0x0040,
-
-        // together, these two flags resulting in a two bit value which matches
-        // up with the SkPaint::Hinting enum.
-        kHinting_Shift            = 7, // to shift into the other flags above
-        kHintingBit1_Flag         = 0x0080,
-        kHintingBit2_Flag         = 0x0100,
-
-        // these should only ever be set if fMaskFormat is LCD16 or LCD32
-        kLCD_Vertical_Flag        = 0x0200,    // else Horizontal
-        kLCD_BGROrder_Flag        = 0x0400,    // else RGB order
-
-        // Generate A8 from LCD source (for GDI), only meaningful if fMaskFormat is kA8
-        // Perhaps we can store this (instead) in fMaskFormat, in hight bit?
-        kGenA8FromLCD_Flag        = 0x0800,
-    };
-    
-    // computed values
-    enum {
-        kHinting_Mask   = kHintingBit1_Flag | kHintingBit2_Flag,
-    };
-
-
-    SkScalerContext(const SkDescriptor* desc);
-    virtual ~SkScalerContext();
-
-    SkMask::Format getMaskFormat() const {
-        return (SkMask::Format)fRec.fMaskFormat;
-    }
-
-    bool isSubpixel() const {
-        return SkToBool(fRec.fFlags & kSubpixelPositioning_Flag);
-    }
-    
-    // remember our glyph offset/base
-    void setBaseGlyphCount(unsigned baseGlyphCount) {
-        fBaseGlyphCount = baseGlyphCount;
-    }
-
-    /** Return the corresponding glyph for the specified unichar. Since contexts
-        may be chained (under the hood), the glyphID that is returned may in
-        fact correspond to a different font/context. In that case, we use the
-        base-glyph-count to know how to translate back into local glyph space.
-     */
-    uint16_t charToGlyphID(SkUnichar uni);
-
-    /** Map the glyphID to its glyph index, and then to its char code. Unmapped
-        glyphs return zero.
-    */
-    SkUnichar glyphIDToChar(uint16_t glyphID);
-
-    unsigned    getGlyphCount() { return this->generateGlyphCount(); }
-    void        getAdvance(SkGlyph*);
-    void        getMetrics(SkGlyph*);
-    void        getImage(const SkGlyph&);
-    void        getPath(const SkGlyph&, SkPath*);
-    void        getFontMetrics(SkPaint::FontMetrics* mX,
-                               SkPaint::FontMetrics* mY);
-
-#ifdef SK_BUILD_FOR_ANDROID
-    unsigned getBaseGlyphCount(SkUnichar charCode);
-
-    // This function must be public for SkTypeface_android.h, but should not be
-    // called by other callers
-    SkFontID findTypefaceIdForChar(SkUnichar uni) {
-        SkScalerContext* ctx = this;
-        while (NULL != ctx) {
-            if (ctx->generateCharToGlyph(uni)) {
-                return ctx->fRec.fFontID;
-            }
-            ctx = ctx->getNextContext();
-        }
-        return 0;
-    }
-#endif
-
-    static inline void MakeRec(const SkPaint&, const SkMatrix*, Rec* rec);
-    static inline void PostMakeRec(const SkPaint&, Rec*);
-
-    static SkScalerContext* Create(const SkDescriptor*);
-    static SkMaskGamma::PreBlend GetMaskPreBlend(const Rec& rec);
-
-protected:
-    Rec         fRec;
-    unsigned    fBaseGlyphCount;
-
-    virtual unsigned generateGlyphCount() = 0;
-    virtual uint16_t generateCharToGlyph(SkUnichar) = 0;
-    virtual void generateAdvance(SkGlyph*) = 0;
-    virtual void generateMetrics(SkGlyph*) = 0;
-    virtual void generateImage(const SkGlyph&, SkMaskGamma::PreBlend* maskPreBlend) = 0;
-    virtual void generatePath(const SkGlyph&, SkPath*) = 0;
-    virtual void generateFontMetrics(SkPaint::FontMetrics* mX,
-                                     SkPaint::FontMetrics* mY) = 0;
-    // default impl returns 0, indicating failure.
-    virtual SkUnichar generateGlyphToChar(uint16_t);
-
-    void forceGenerateImageFromPath() { fGenerateImageFromPath = true; }
-
-private:
-    SkPathEffect*   fPathEffect;
-    SkMaskFilter*   fMaskFilter;
-    SkRasterizer*   fRasterizer;
-
-    // if this is set, we draw the image from a path, rather than
-    // calling generateImage.
-    bool fGenerateImageFromPath;
-
-    void internalGetPath(const SkGlyph& glyph, SkPath* fillPath,
-                         SkPath* devPath, SkMatrix* fillToDevMatrix);
-
-    // return the next context, treating fNextContext as a cache of the answer
-    SkScalerContext* getNextContext();
-
-    // returns the right context from our link-list for this glyph. If no match
-    // is found, just returns the original context (this)
-    SkScalerContext* getGlyphContext(const SkGlyph& glyph);
-
-    // link-list of context, to handle missing chars. null-terminated.
-    SkScalerContext* fNextContext;
-
-    // converts linear masks to gamma correcting masks.
-    SkMaskGamma::PreBlend fMaskPreBlend;
-};
-
-#define kRec_SkDescriptorTag            SkSetFourByteTag('s', 'r', 'e', 'c')
-#define kPathEffect_SkDescriptorTag     SkSetFourByteTag('p', 't', 'h', 'e')
-#define kMaskFilter_SkDescriptorTag     SkSetFourByteTag('m', 's', 'k', 'f')
-#define kRasterizer_SkDescriptorTag     SkSetFourByteTag('r', 'a', 's', 't')
-
-///////////////////////////////////////////////////////////////////////////////
-
-enum SkAxisAlignment {
-    kNone_SkAxisAlignment,
-    kX_SkAxisAlignment,
-    kY_SkAxisAlignment
-};
-
-/**
- *  Return the axis (if any) that the baseline for horizontal text will land on
- *  after running through the specified matrix.
- *
- *  As an example, the identity matrix will return kX_SkAxisAlignment
- */
-SkAxisAlignment SkComputeAxisAlignmentForHText(const SkMatrix& matrix);
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkPaint::Hinting SkScalerContextRec::getHinting() const {
-    unsigned hint = (fFlags & SkScalerContext::kHinting_Mask) >>
-                                            SkScalerContext::kHinting_Shift;
-    return static_cast<SkPaint::Hinting>(hint);
-}
-
-void SkScalerContextRec::setHinting(SkPaint::Hinting hinting) {
-    fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) |
-                                (hinting << SkScalerContext::kHinting_Shift);
-}
-
-
-#endif
-