SIMD implementation of Convolver for Lanczos filter etc.

skia/ext/image_operations_bench.cc

Index: skia/ext/image_operations_bench.cc
diff --git a/skia/ext/image_operations_bench.cc b/skia/ext/image_operations_bench.cc
index f590458ea745464ff948c5cfb848ec93e2605689..49d29d986080144caddc7f68d07269c0de2f0554 100644
--- a/skia/ext/image_operations_bench.cc
+++ b/skia/ext/image_operations_bench.cc
@@ -232,7 +232,16 @@ bool Benchmark::Run() const {
   source.setConfig(SkBitmap::kARGB_8888_Config,
                    source_.width(), source_.height());
   source.allocPixels();
-  source.eraseARGB(0, 0, 0, 0);
+
+  // Randomize the image for testing.
+  srand(time(0));
+  unsigned char* src_ptr = static_cast<unsigned char*>(source.getPixels());
+  for (int y = 0; y < source_.height(); y++) {
+    for (int x = 0; x < source_.width()*4; x++) {

[evannier, 2011/02/14 23:45:13]

I am not much of a fan of the hard coded '4', but I have tons of code doing this
in Chrome (which I correct when I find it, and need to modify it).

[fbarchard, 2011/02/15 23:16:45]

The width()*4 should also have a space.
Maybe you should fill source.rowBytes() instead?

[jiesun, 2011/02/17 20:17:58]

Done.

[jiesun, 2011/02/17 20:17:58]

Done.

+      src_ptr[x] = rand() % 255;
+    }
+    src_ptr += source.rowBytes();
+  }
 
   SkBitmap dest;