Scanline decoding for wbmp

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
 
 #include "SkCodec.h"
 #include "SkColor.h"
 #include "SkImageInfo.h"
 
 class SkSwizzler : public SkNoncopyable {
 public:
     /**
      *  Enum describing the config of the source data.
      */
     enum SrcConfig {
         kUnknown,  // Invalid type.
+        kBit,

[scroggo, 2015/07/29 17:47:12]

Should there be a comment explaining what kBit means? Maybe it's obvious? (A bit
could be used to distinguish between opaque and transparent, which could
actually map to the same values, so maybe that's okay? And it could also map to
any arbitrary colors, but I suppose that would be kIndex1...)

[msarett, 2015/07/29 18:53:57]

Adding a description.

         kGray,
         kIndex1,
         kIndex2,
         kIndex4,
         kIndex,
         kRGB,
         kBGR,
         kRGBX,
         kBGRX,
         kRGBA,
@@ skipping 37 matching lines @@
      */
     static ResultAlpha GetResult(uint8_t zeroAlpha, uint8_t maxAlpha);
 
     /*
      *
      * Returns bits per pixel for source config
      *
      */
     static int BitsPerPixel(SrcConfig sc) {
         switch (sc) {
+            case kBit:
             case kIndex1:
                 return 1;
             case kIndex2:
                 return 2;
             case kIndex4:
                 return 4;
             case kGray:
             case kIndex:
                 return 8;
             case kRGB_565:
@@ skipping 107 matching lines @@
                                           // else
                                           //     deltaSrc is bitsPerPixel
     const SkImageInfo   fDstInfo;
     int                 fCurrY;
 
     SkSwizzler(RowProc proc, const SkPMColor* ctable, int deltaSrc,
                const SkImageInfo& info);
 
 };
 #endif // SkSwizzler_DEFINED