Add compressed texture capabilities for GPU devices

include/gpu/GrTypes.h

Index: include/gpu/GrTypes.h
diff --git a/include/gpu/GrTypes.h b/include/gpu/GrTypes.h
index c1b3554c6e008eb322d18838618a53cbeeb54495..1155d5cb70ec0479bafc67dbfbab46c55d2ed53f 100644
--- a/include/gpu/GrTypes.h
+++ b/include/gpu/GrTypes.h
@@ -620,6 +620,17 @@ enum GrGLBackendState {
 };
 
 /**

[robertphillips, 2014/05/22 22:00:26]

that _can be_ ?
Do we really need/use the "Uncompressed" value?

[krajcevski, 2014/05/22 22:17:12]

Fixed the phrasing.
Here there needs to be a way to distinguish compressed textures from
uncompressed textures. We could make a separate GrCompressedTextureDesc that
gets passed around all of the calls, but I think that would be more trouble than
it's worth. In my opinion it'd be better to just have a field in the existing
GrTextureDesc that contains the compressed format, or uncompressed if it's
uncompressed (the default). 

+ * The compressed texture formats that are supported
+ */
+enum GrCompressedFormat {
+    kUncompressed_GrCompressedFormat = -1,
+    kETC1_GrCompressedFormat         =  0,
+
+    kLast_GrCompressedFormat = kETC1_GrCompressedFormat
+};
+static const size_t kCompressedFormatCount = kLast_GrCompressedFormat + 1;
+
+/**
  * This value translates to reseting all the context state for any backend.
  */
 static const uint32_t kAll_GrBackendState = 0xffffffff;