Add a GL cap for instanced rendering to floating point

include/gpu/GrTypes.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypes_DEFINED
 #define GrTypes_DEFINED
 
@@ skipping 367 matching lines @@
         case kLATC_GrPixelConfig:
         case kASTC_12x12_GrPixelConfig:
         case kAlpha_8_GrPixelConfig:
         case kAlpha_half_GrPixelConfig:
             return true;
         default:
             return false;
     }
 }
 
+static inline bool GrPixelConfigIsFloatingPoint(GrPixelConfig config) {
+    switch (config) {
+        case kRGBA_float_GrPixelConfig:
+        case kAlpha_half_GrPixelConfig:
+        case kRGBA_half_GrPixelConfig:
+            return true;
+        default:
+            return false;
+    }
+}
+
 /**
  * Optional bitfield flags that can be set on GrSurfaceDesc (below).
  */
 enum GrSurfaceFlags {
     kNone_GrSurfaceFlags            = 0x0,
     /**
      * Creates a texture that can be rendered to as a GrRenderTarget. Use
      * GrTexture::asRenderTarget() to access.
      */
     kRenderTarget_GrSurfaceFlag     = 0x1,
@@ skipping 226 matching lines @@
             return 4 * width * height;
     }
 }
 
 /**
  * This value translates to reseting all the context state for any backend.
  */
 static const uint32_t kAll_GrBackendState = 0xffffffff;
 
 #endif