Check that attachments are the correct type for the attachment type

gpu/command_buffer/common/gles2_cmd_utils.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file is here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #ifndef GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_
 #define GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_
 
@@ skipping 41 matching lines @@
 // A wrapper for SafeAdd to remove the need to cast.
 inline bool SafeAddUint32(uint32 a, uint32 b, uint32* dst) {
   return SafeAdd(a, b, dst);
 }
 
 // Utilties for GLES2 support.
 class GLES2_UTILS_EXPORT GLES2Util {
  public:
   static const int kNumFaces = 6;
 
+  // Bits returned by GetChannelsForFormat
+  enum ChannelBits {
+    kRed = 0x1,
+    kGreen = 0x2,
+    kBlue = 0x4,
+    kAlpha = 0x8,
+    kDepth = 0x10000,
+    kStencil = 0x20000,
+
+    kRGB = kRed | kGreen | kBlue,
+    kRGBA = kRGB | kAlpha
+  };
+
   struct EnumToString {
     uint32 value;
     const char* name;
   };
 
   GLES2Util()
       : num_compressed_texture_formats_(0),
         num_shader_binary_formats_(0) {
   }
 
@@ skipping 27 matching lines @@
   static uint32 GetGLDataTypeSizeForUniforms(int type);
 
   static size_t GetGLTypeSizeForTexturesAndBuffers(uint32 type);
 
   static uint32 GLErrorToErrorBit(uint32 gl_error);
 
   static uint32 GLErrorBitToGLError(uint32 error_bit);
 
   static uint32 IndexToGLFaceTarget(int index);
 
-  // Returns a bitmask for the channels the given format supports where
-  // 0x1 is red
-  // 0x2 is green
-  // 0x4 is blue
-  // 0x8 is alpha
+  // Returns a bitmask for the channels the given format supports.
+  // See ChannelBits.
   static uint32 GetChannelsForFormat(int format);
 
+  // Returns a bitmask for the channels the given attachment type needs.
+  static uint32 GetChannelsNeededForAttachmentType(int type);
+
   static bool IsNPOT(uint32 value) {
     return value > 0 && (value & (value - 1)) != 0;
   }
 
   static std::string GetStringEnum(uint32 value);
   static std::string GetStringBool(uint32 value);
   static std::string GetStringError(uint32 value);
 
   #include "../common/gles2_cmd_utils_autogen.h"
 
  private:
   static std::string GetQualifiedEnumString(
       const EnumToString* table, size_t count, uint32 value);
 
   static const EnumToString* enum_to_string_table_;
   static const size_t enum_to_string_table_len_;
 
   int num_compressed_texture_formats_;
   int num_shader_binary_formats_;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_