Only use JDCT_IFAST if it's supported.

src/images/SkImageDecoder_libjpeg.cpp

 
 /*
  * Copyright 2007 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.
  */
 
 
 #include "SkImageDecoder.h"
@@ skipping 947 matching lines @@
         cinfo.input_components = 3;
 #ifdef WE_CONVERT_TO_YUV
         cinfo.in_color_space = JCS_YCbCr;
 #else
         cinfo.in_color_space = JCS_RGB;
 #endif
         cinfo.input_gamma = 1;
 
         jpeg_set_defaults(&cinfo);
         jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
+#ifdef DCT_IFAST_SUPPORTED
         cinfo.dct_method = JDCT_IFAST;
+#endif
 
         jpeg_start_compress(&cinfo, TRUE);
 
         const int       width = bm.width();
         uint8_t*        oneRowP = (uint8_t*)oneRow.reset(width * 3);
 
         const SkPMColor* colors = ctLocker.lockColors(bm);
         const void*      srcRow = bm.getPixels();
 
         while (cinfo.next_scanline < cinfo.image_height) {
@@ skipping 35 matching lines @@
     return SkNEW(SkJPEGImageDecoder);
 }
 
 static SkImageEncoder* sk_libjpeg_efactory(SkImageEncoder::Type t) {
     return (SkImageEncoder::kJPEG_Type == t) ? SkNEW(SkJPEGImageEncoder) : NULL;
 }
 
 
 static SkTRegistry<SkImageDecoder*, SkStream*> gDReg(sk_libjpeg_dfactory);
 static SkTRegistry<SkImageEncoder*, SkImageEncoder::Type> gEReg(sk_libjpeg_efactory);