More general version of image filtering; reworked to be robust and easier to SSE

gyp/opts.gyp

 {
   'targets': [
     # Due to an unfortunate intersection of lameness between gcc and gyp,
     # we have to build the *_SSE2.cpp files in a separate target.  The
     # gcc lameness is that, in order to compile SSE2 intrinsics code, it
     # must be passed the -msse2 flag.  However, with this flag, it may
     # emit SSE2 instructions even for scalar code, such as the CPUID
     # test used to test for the presence of SSE2.  So that, and all other
     # code must be compiled *without* -msse2.  The gyp lameness is that it
     # does not allow file-specific CFLAGS, so we must create this extra
@@ skipping 25 matching lines @@
               'cflags': [
                 '-msse2',
               ],
             }],
             [ 'skia_os != "android"', {
               'dependencies': [
                 'opts_ssse3',
               ],
             }],
           ],
+          'include_dirs': [
+            '../include/utils',
+          ],
           'sources': [
             '../src/opts/opts_check_SSE2.cpp',
             '../src/opts/SkBitmapProcState_opts_SSE2.cpp',
+            '../src/opts/SkBitmapFilter_opts_SSE2.cpp',
             '../src/opts/SkBlitRow_opts_SSE2.cpp',
             '../src/opts/SkBlitRect_opts_SSE2.cpp',
             '../src/opts/SkUtils_opts_SSE2.cpp',
           ],
         }],
         [ 'skia_arch_type == "arm" and armv7 == 1', {
           # The assembly uses the frame pointer register (r7 in Thumb/r11 in
           # ARM), the compiler doesn't like that.
           'cflags!': [
             '-fno-omit-frame-pointer',
@@ skipping 114 matching lines @@
       ],
     },
   ],
 }
 
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