gpu: support R16 GPUMemoryBuffer

ui/gfx/buffer_format_util.cc

Index: ui/gfx/buffer_format_util.cc
diff --git a/ui/gfx/buffer_format_util.cc b/ui/gfx/buffer_format_util.cc
index 35003e1072d35d61bad2264967eb9cf4f1b17e1f..72667e654aac9643950a50f8baf22a2cfb3b0a9b 100644
--- a/ui/gfx/buffer_format_util.cc
+++ b/ui/gfx/buffer_format_util.cc
@@ -11,16 +11,24 @@
 namespace gfx {
 namespace {
 
-const BufferFormat kBufferFormats[] = {
-    BufferFormat::ATC,       BufferFormat::ATCIA,
-    BufferFormat::DXT1,      BufferFormat::DXT5,
-    BufferFormat::ETC1,      BufferFormat::R_8,
-    BufferFormat::RG_88,     BufferFormat::BGR_565,
-    BufferFormat::RGBA_4444, BufferFormat::RGBX_8888,
-    BufferFormat::RGBA_8888, BufferFormat::BGRX_8888,
-    BufferFormat::BGRA_8888, BufferFormat::RGBA_F16,
-    BufferFormat::UYVY_422,  BufferFormat::YUV_420_BIPLANAR,
-    BufferFormat::YVU_420};
+const BufferFormat kBufferFormats[] = {BufferFormat::ATC,
+                                       BufferFormat::ATCIA,
+                                       BufferFormat::DXT1,
+                                       BufferFormat::DXT5,
+                                       BufferFormat::ETC1,
+                                       BufferFormat::R_8,
+                                       BufferFormat::R_16,
+                                       BufferFormat::RG_88,
+                                       BufferFormat::BGR_565,
+                                       BufferFormat::RGBA_4444,
+                                       BufferFormat::RGBX_8888,
+                                       BufferFormat::RGBA_8888,
+                                       BufferFormat::BGRX_8888,
+                                       BufferFormat::BGRA_8888,
+                                       BufferFormat::RGBA_F16,
+                                       BufferFormat::UYVY_422,
+                                       BufferFormat::YUV_420_BIPLANAR,
+                                       BufferFormat::YVU_420};
 
 static_assert(arraysize(kBufferFormats) ==
                   (static_cast<int>(BufferFormat::LAST) + 1),
@@ -49,6 +57,7 @@ bool RowSizeForBufferFormatChecked(
         return false;
       *size_in_bytes = (checked_size & ~0x3).ValueOrDie();
       return true;
+    case BufferFormat::R_16:
     case BufferFormat::RG_88:
     case BufferFormat::BGR_565:
     case BufferFormat::RGBA_4444:
@@ -102,6 +111,7 @@ size_t NumberOfPlanesForBufferFormat(BufferFormat format) {
     case BufferFormat::DXT5:
     case BufferFormat::ETC1:
     case BufferFormat::R_8:
+    case BufferFormat::R_16:
     case BufferFormat::RG_88:
     case BufferFormat::BGR_565:
     case BufferFormat::RGBA_4444:
@@ -129,6 +139,7 @@ size_t SubsamplingFactorForBufferFormat(BufferFormat format, size_t plane) {
     case BufferFormat::DXT5:
     case BufferFormat::ETC1:
     case BufferFormat::R_8:
+    case BufferFormat::R_16:
     case BufferFormat::RG_88:
     case BufferFormat::BGR_565:
     case BufferFormat::RGBA_4444:
@@ -201,6 +212,7 @@ size_t BufferOffsetForBufferFormat(const Size& size,
     case BufferFormat::DXT5:
     case BufferFormat::ETC1:
     case BufferFormat::R_8:
+    case BufferFormat::R_16:
     case BufferFormat::RG_88:
     case BufferFormat::BGR_565:
     case BufferFormat::RGBA_4444: