add FilterLevel API to SkPaint, replacing various Flag bits

include/core/SkPaint.h

 
 
 /*
  * 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.
  */
 
 
@@ skipping 80 matching lines @@
     Hinting getHinting() const {
         return static_cast<Hinting>(fHinting);
     }
 
     void setHinting(Hinting hintingLevel);
 
     /** Specifies the bit values that are stored in the paint's flags.
     */
     enum Flags {
         kAntiAlias_Flag       = 0x01,   //!< mask to enable antialiasing
-        kFilterBitmap_Flag    = 0x02,   //!< mask to enable bitmap filtering
+
+        // DEPRECATED -- use setFilterLevel instead
+        kFilterBitmap_Flag    = 0x02, // temporary flag
+
         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
+        
+        // DEPRECATED -- use setFilterLevel instead
         kHighQualityFilterBitmap_Flag = 0x4000, // temporary flag
+        // DEPRECATED -- use setFilterLevel instead
         kHighQualityDownsampleBitmap_Flag = 0x8000, // temporary flag
 
         // when adding extra flags, note that the fFlags member is specified
         // with a bit-width and you'll have to expand it.
 
         kAllFlags = 0xFFFF
     };
 
     /** Return the paint's flags. Use the Flag enum to test flag values.
         @return the paint's flags (see enums ending in _Flag for bit masks)
@@ skipping 148 matching lines @@
     bool isDevKernText() const {
         return SkToBool(this->getFlags() & kDevKernText_Flag);
     }
 
     /** Helper for setFlags(), setting or clearing the kKernText_Flag bit
         @param kernText true to set the kKernText_Flag bit in the paint's
                             flags, false to clear it.
     */
     void setDevKernText(bool devKernText);
 
-    bool isFilterBitmap() const {
-        return SkToBool(this->getFlags() & kFilterBitmap_Flag);
+    enum FilterLevel {
+        kNone_FilterLevel,
+        kLow_FilterLevel,
+        kMedium_FilterLevel,
+        kHigh_FilterLevel
+    };
+
+    /**
+     *  Return the filter level. This affects the quality (and performance) of
+     *  drawing scaled images.
+     */
+    FilterLevel getFilterLevel() const;
+
+    /**
+     *  Set the filter level. This affects the quality (and performance) of
+     *  drawing scaled images.
+     */
+    void setFilterLevel(FilterLevel);
+
+    /**
+     *  DEPRECATED: use setFilterLevel instead.
+     *  If the predicate is true, set the filterLevel to Low, else set it to
+     *  None.
+     */
+    void setFilterBitmap(bool doFilter) {
+        this->setFilterLevel(doFilter ? kLow_FilterLevel : kNone_FilterLevel);
     }
 
-    void setFilterBitmap(bool filterBitmap);
+    /**
+     *  DEPRECATED: call getFilterLevel() instead.
+     *  Returns true if getFilterLevel() returns anything other than None.
+     */
+    bool isFilterBitmap() const {
+        return kNone_FilterLevel != this->getFilterLevel();
+    }
 
     /** Styles apply to rect, oval, path, and text.
         Bitmaps are always drawn in "fill", and lines are always drawn in
         "stroke".
 
         Note: strokeandfill implicitly draws the result with
         SkPath::kWinding_FillType, so if the original path is even-odd, the
         results may not appear the same as if it was drawn twice, filled and
         then stroked.
     */
@@ skipping 764 matching lines @@
 #ifdef SK_BUILD_FOR_ANDROID
     SkPaintOptionsAndroid fPaintOptionsAndroid;
 
     // In order for the == operator to work properly this must be the last field
     // in the struct so that we can do a memcmp to this field's offset.
     uint32_t        fGenerationID;
 #endif
 };
 
 #endif