arm: dynamic NEON support for SkBlitRow_opts_arm.cpp

This patch moves all NEON-specific code from the source
src/opts/SkBlitRow_opts_arm.cpp into a new file that is
built as part of the 'opts_arm_neon' static library.
Review URL: https://codereview.appspot.com/6449110

git-svn-id: http://skia.googlecode.com/svn/trunk@5016 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/opts.gyp

@@ -64,6 +64,7 @@
             '../src/opts/memset.arm.S',
             '../src/opts/SkBitmapProcState_opts_arm.cpp',
             '../src/opts/SkBlitRow_opts_arm.cpp',
+            '../src/opts/SkBlitRow_opts_arm.h',
           ],
           'conditions': [
             [ 'arm_neon == 1 or arm_neon_optional == 1', {
@@ -141,9 +142,11 @@
       'sources': [
         '../src/opts/memset16_neon.S',
         '../src/opts/memset32_neon.S',
+        '../src/opts/SkBitmapProcState_arm_neon.cpp',
         '../src/opts/SkBitmapProcState_matrixProcs_neon.cpp',
         '../src/opts/SkBitmapProcState_matrix_clamp_neon.h',
         '../src/opts/SkBitmapProcState_matrix_repeat_neon.h',
+        '../src/opts/SkBlitRow_opts_arm_neon.cpp',
       ],
     },
   ],

src/opts/SkBlitRow_opts_arm.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef SkBlitRow_opts_arm_DEFINED
+#define SkBlitRow_opts_arm_DEFINED
+
+#include "SkBlitRow.h"
+#include "SkUtilsArm.h"
+
+// Define USE_NEON_CODE to indicate that we need to build NEON routines
+#define USE_NEON_CODE  (!SK_ARM_NEON_IS_NONE)
+
+// Define USE_ARM_CODE to indicate that we need to build ARM routines
+#define USE_ARM_CODE   (!SK_ARM_NEON_IS_ALWAYS)
+
+#if USE_NEON_CODE
+// These are defined in SkBlitRow_opts_arm_neon.cpp
+extern const SkBlitRow::Proc sk_blitrow_platform_565_procs_arm_neon[];
+extern const SkBlitRow::Proc sk_blitrow_platform_4444_procs_arm_neon[];
+extern const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[];
+
+extern void Color32_arm_neon(SkPMColor* dst, const SkPMColor* src, int count,
+                             SkPMColor color);
+#endif
+
+#if USE_ARM_CODE
+// These are defined in SkBlitRow_opts_arm.cpp
+extern const SkBlitRow::Proc sk_blitrow_platform_565_procs_arm[];
+extern const SkBlitRow::Proc sk_blitrow_platform_4444_procs_arm[];
+extern const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm[];
+#endif
+
+// Defined in SkBlitRow_opts_arm.cpp, used in all cases.
+extern void S32A_Blend_BlitRow32_arm(SkPMColor* SK_RESTRICT dst,
+                                     const SkPMColor* SK_RESTRICT src,
+                                     int count, U8CPU alpha);
+
+#endif