Add libjpeg-turbo library (depends on yasm)

Mangle external function names to avoid conflict with libjpeg
Take advantage of direct color conversion (RGBA, BGRA, 565)
Prepare to use jpeg_skip_scanlines (when it is upstreamed)

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/b60c3f8291529303299262dba19b1a896060bd2d

Review URL: https://codereview.chromium.org/1180983002

1 files changed, 7 insertions, 2 deletions

diff --git a/src/codec/SkJpegCodec.h b/src/codec/SkJpegCodec.h
index 87c925d9d1..1844269e6b 100644
--- a/src/codec/SkJpegCodec.h
+++ b/src/codec/SkJpegCodec.h
@@ -100,6 +100,13 @@ private:
     bool handleRewind();
 
     /*
+     * Checks if the conversion between the input image and the requested output
+     * image has been implemented
+     * Sets the output color space
+     */
+    bool setOutputColorSpace(const SkImageInfo& dst);
+
+    /*
      * Checks if we can scale to the requested dimensions and scales the dimensions
      * if possible
      */
@@ -112,8 +119,6 @@ private:
             const Options& options);
 
     SkAutoTDelete<JpegDecoderMgr> fDecoderMgr;
-    SkAutoTDelete<SkSwizzler>     fSwizzler;
-    size_t                        fSrcRowBytes;
 
     friend class SkJpegScanlineDecoder;