Add query for block dimensions of a given format

src/opts/SkTextureCompression_opts_arm.cpp

Index: src/opts/SkTextureCompression_opts_arm.cpp
diff --git a/src/opts/SkTextureCompression_opts_arm.cpp b/src/opts/SkTextureCompression_opts_arm.cpp
index 3a97a5ed9a161a099f60324c1d6ca86f1b6f49d7..3ec64249d280c9a6266b2362efec52f4e11f879a 100644
--- a/src/opts/SkTextureCompression_opts_arm.cpp
+++ b/src/opts/SkTextureCompression_opts_arm.cpp
@@ -36,3 +36,24 @@ SkTextureCompressorGetPlatformProc(SkColorType colorType, SkTextureCompressor::F
     }
 #endif
 }
+

[robertphillips, 2014/07/29 16:16:04]

'*'s go on the LHS

[krajcevski, 2014/07/29 17:49:51]

Done.

+bool SkTextureCompressorGetPlatformDims(SkTextureCompressor::Format fmt, int *dimX, int* dimY) {
+#if SK_ARM_NEON_IS_NONE
+    return false;
+#else
+#if SK_ARM_NEON_IS_DYNAMIC
+    if (!sk_cpu_arm_has_neon()) {
+        return false;
+    }
+#endif
+    switch (fmt) {
+        case SkTextureCompressor::kR11_EAC_Format:
+            *dimX = 16;
+            *dimY = 4;
+            return true;

[robertphillips, 2014/07/29 16:16:04]

Why not ASTC here?

[krajcevski, 2014/07/29 17:49:51]

We don't have ARM NEON optimized ASTC encoders.

+        default:
+            return false;
+    }
+    return false;
+#endif
+}