SkScaledCodec class

src/codec/SkSwizzler.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkSwizzler_DEFINED
 #define SkSwizzler_DEFINED
 
@@ skipping 104 matching lines @@
     /**
      *  Create a new SkSwizzler.
      *  @param SrcConfig Description of the format of the source.
      *  @param SkImageInfo dimensions() describe both the src and the dst.
      *              Other fields describe the dst.
      *  @param dst Destination to write pixels. Must match info and dstRowBytes
      *  @param dstRowBytes rowBytes for dst.
      *  @param ZeroInitialized Whether dst is zero-initialized. The
                                implementation may choose to skip writing zeroes
      *                         if set to kYes_ZeroInitialized.
+     *  @param sampleX the step between samples in the x direction.

[scroggo, 2015/07/30 18:05:57]

Update the comment to match the new parameter?

[emmaleer, 2015/07/30 22:27:56]

Acknowledged.

      *  @return A new SkSwizzler or NULL on failure.
      */
     static SkSwizzler* CreateSwizzler(SrcConfig, const SkPMColor* ctable,
                                       const SkImageInfo&, void* dst,
                                       size_t dstRowBytes,
-                                      SkCodec::ZeroInitialized);
+                                      SkCodec::ZeroInitialized, const SkImageInfo&);
 
     /**
      * Fill the remainder of the destination with a single color
      *
      * @param dstStartRow
      * The destination row to fill from.
      *
      * @param numRows
      * The number of rows to fill.
      *
@@ skipping 97 matching lines @@
     const RowProc       fRowProc;
     const SkPMColor*    fColorTable;      // Unowned pointer
     const int           fDeltaSrc;        // if bitsPerPixel % 8 == 0
                                           //     deltaSrc is bytesPerPixel
                                           // else
                                           //     deltaSrc is bitsPerPixel
     const SkImageInfo   fDstInfo;
     void*               fDstRow;
     const size_t        fDstRowBytes;
     int                 fCurrY;
+    const int           fX0;              // first X coord to sample
+    const int           fSampleX;         // step between X samples
 
     SkSwizzler(RowProc proc, const SkPMColor* ctable, int deltaSrc,
-               const SkImageInfo& info, void* dst, size_t rowBytes);
+               const SkImageInfo& info, void* dst, size_t rowBytes, int sampleX);
 
 };
 #endif // SkSwizzler_DEFINED