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-rw-r--r--include/core/SkScalerContext.h286
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
-
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