WIP -- separate out Parts from SkPaint

include/core/SkPaintParts.h

+/*
+ * Copyright 2010 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkPaintParts_DEFINED
+#define SkPaintParts_DEFINED
+
+#include "SkColor.h"
+
+class SkAnnotation;
+class SkAutoGlyphCache;
+class SkColorFilter;
+class SkDescriptor;
+struct SkDeviceProperties;
+class SkDrawLooper;
+class SkReadBuffer;
+class SkWriteBuffer;
+struct SkGlyph;
+struct SkRect;
+class SkGlyphCache;
+class SkImageFilter;
+class SkMaskFilter;
+class SkPath;
+class SkPathEffect;
+struct SkPoint;
+class SkRasterizer;
+class SkShader;
+class SkTypeface;
+class SkXfermode;
+
+class SkPaintParts {
+public:
+    SkPaintParts() {
+        sk_bzero(this, sizeof(*this));
+    }
+
+    SkPaintParts(const SkPaintParts& other) {
+        memcpy(this, &other, sizeof(other));
+    }
+
+    SkPaintParts& operator=(const SkPaintParts& other) {
+        memcpy(this, &other, sizeof(other));
+        return *this;
+    }
+
+    bool operator==(const SkPaintParts& other) const;
+    bool operator!=(const SkPaintParts& other) const {
+        return !(*this == other);
+    }
+
+    /** Specifies the bit values that are stored in the paint's flags.
+     */
+    enum Flags {
+        kAntiAlias_Flag       = 0x01,   //!< mask to enable antialiasing
+        // 0x02 -- available!
+        kDither_Flag          = 0x04,   //!< mask to enable dithering
+        kUnderlineText_Flag   = 0x08,   //!< mask to enable underline text
+        kStrikeThruText_Flag  = 0x10,   //!< mask to enable strike-thru text
+        kFakeBoldText_Flag    = 0x20,   //!< mask to enable fake-bold text
+        kLinearText_Flag      = 0x40,   //!< mask to enable linear-text
+        kSubpixelText_Flag    = 0x80,   //!< mask to enable subpixel text positioning
+        kDevKernText_Flag     = 0x100,  //!< mask to enable device kerning text
+        kLCDRenderText_Flag   = 0x200,  //!< mask to enable subpixel glyph renderering
+        kEmbeddedBitmapText_Flag = 0x400, //!< mask to enable embedded bitmap strikes
+        kAutoHinting_Flag     = 0x800,  //!< mask to force Freetype's autohinter
+        kVerticalText_Flag    = 0x1000,
+        kGenA8FromLCD_Flag    = 0x2000, // hack for GDI -- do not use if you can help it
+        kDistanceFieldTextTEMP_Flag = 0x4000, //!< TEMPORARY mask to enable distance fields
+        // currently overrides LCD and subpixel rendering
+        // when adding extra flags, note that the fFlags member is specified
+        // with a bit-width and you'll have to expand it.
+        
+        kAllFlags = 0xFFFF
+    };
+    
+    uint32_t getFlags() const { return fFlags; }
+    void setFlags(uint32_t flags) { fFlags = flags; }
+
+    enum Hinting {
+        kNo_Hinting            = 0,
+        kSlight_Hinting        = 1,
+        kNormal_Hinting        = 2,     //!< this is the default
+        kFull_Hinting          = 3
+    };
+    
+    Hinting getHinting() const {
+        return static_cast<Hinting>(fHinting);
+    }
+    void setHinting(Hinting hinting) { fHinting = hinting; }
+
+    enum FilterLevel {
+        kNone_FilterLevel,
+        kLow_FilterLevel,
+        kMedium_FilterLevel,
+        kHigh_FilterLevel
+    };
+    
+    FilterLevel getFilterLevel() const { return static_cast<FilterLevel>(fFilterLevel); }
+    void setFilterLevel(FilterLevel level) { fFilterLevel = level; }
+
+    enum Style {
+        kFill_Style,            //!< fill the geometry
+        kStroke_Style,          //!< stroke the geometry
+        kStrokeAndFill_Style,   //!< fill and stroke the geometry
+    };
+    
+    Style getStyle() const { return static_cast<Style>(fStyle); }
+    void setStyle(Style style) { fStyle = style; }
+
+    SkColor getColor() const { return fColor; }
+    void setColor(SkColor color) { fColor = color; }
+
+    enum TextEncoding {
+        kUTF8_TextEncoding,     //!< the text parameters are UTF8
+        kUTF16_TextEncoding,    //!< the text parameters are UTF16
+        kUTF32_TextEncoding,    //!< the text parameters are UTF32
+        kGlyphID_TextEncoding   //!< the text parameters are glyph indices
+    };
+    
+    TextEncoding getTextEncoding() const { return static_cast<TextEncoding>(fTextEncoding); }
+    void setTextEncoding(TextEncoding encoding) { fTextEncoding = encoding; }
+
+    enum Align {
+        kLeft_Align,
+        kCenter_Align,
+        kRight_Align,
+    };
+    
+    Align getTextAlign() const { return static_cast<Align>(fTextAlign); }
+    void setTextAlign(Align align) { fTextAlign = align; }
+
+    SkScalar getTextSize() const { return fTextSize; }
+    void setTextSize(SkScalar size) { fTextSize = size; }
+
+    SkScalar getTextScaleX() const { return fTextScaleX; }
+    void setTextScaleX(SkScalar scale) { fTextScaleX = scale; }
+    
+    SkScalar getTextSkewX() const { return fTextSkewX; }
+    void setTextSkewX(SkScalar skew) { fTextSkewX = skew; }
+   
+    SkScalar getStrokeWidth() const { return fWidth; }
+    void setStrokeWidth(SkScalar width) { fWidth = width; }
+    
+    SkScalar getStrokeMiter() const { return fMiterLimit; }
+    void setStrokeMiter(SkScalar miter) { fMiterLimit = miter; }
+
+    enum Cap {
+        kButt_Cap,      //!< begin/end contours with no extension
+        kRound_Cap,     //!< begin/end contours with a semi-circle extension
+        kSquare_Cap,    //!< begin/end contours with a half square extension
+        
+        kDefault_Cap = kButt_Cap
+    };
+
+    Cap getStrokeCap() const { return static_cast<Cap>(fCapType); }
+    void setStrokeCap(Cap cap) { fCapType = cap; }
+
+    enum Join {
+        kMiter_Join,    //!< connect path segments with a sharp join
+        kRound_Join,    //!< connect path segments with a round join
+        kBevel_Join,    //!< connect path segments with a flat bevel join
+        
+        kDefault_Join = kMiter_Join
+    };
+
+    Join getStrokeJoin() const { return static_cast<Join>(fJoinType); }
+    void setStrokeJoin(Join join) { fJoinType = join; }
+
+    SkTypeface*     fTypeface;
+    SkPathEffect*   fPathEffect;
+    SkShader*       fShader;
+    SkXfermode*     fXfermode;
+    SkMaskFilter*   fMaskFilter;
+    SkColorFilter*  fColorFilter;
+    SkRasterizer*   fRasterizer;
+    SkDrawLooper*   fLooper;
+    SkImageFilter*  fImageFilter;
+    SkAnnotation*   fAnnotation;
+    
+private:
+    friend class SkPaint;
+
+    SkScalar        fTextSize;
+    SkScalar        fTextScaleX;
+    SkScalar        fTextSkewX;
+    SkColor         fColor;
+    SkScalar        fWidth;
+    SkScalar        fMiterLimit;
+    union {
+        struct {
+            // all of these bitfields should add up to 32
+            unsigned        fFlags : 16;
+            unsigned        fTextAlign : 2;
+            unsigned        fCapType : 2;
+            unsigned        fJoinType : 2;
+            unsigned        fStyle : 2;
+            unsigned        fTextEncoding : 2;  // 3 values
+            unsigned        fHinting : 2;
+            unsigned        fFilterLevel : 2;
+            //unsigned      fFreeBits : 2;
+        };
+        uint32_t fBitfields;
+    };
+};
+
+#endif