Implement support for rendering to 32-bit float textures on ES3

gpu/command_buffer/service/framebuffer_manager.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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 28 matching lines @@
     virtual void SetCleared(
         RenderbufferManager* renderbuffer_manager,
         TextureManager* texture_manager,
         bool cleared) = 0;
     virtual bool IsTexture(TextureRef* texture) const = 0;
     virtual bool IsRenderbuffer(
         Renderbuffer* renderbuffer) const = 0;
     virtual bool CanRenderTo() const = 0;
     virtual void DetachFromFramebuffer(Framebuffer* framebuffer) const = 0;
     virtual bool ValidForAttachmentType(
-        GLenum attachment_type, uint32 max_color_attachments) = 0;
+        GLenum attachment_type, uint32 max_color_attachments,
+        bool allow_float_color_attachment) = 0;
     virtual void AddToSignature(
         TextureManager* texture_manager, std::string* signature) const = 0;
 
    protected:
     friend class base::RefCounted<Attachment>;
     virtual ~Attachment() {}
   };
 
   Framebuffer(FramebufferManager* manager, GLuint service_id);
 
@@ skipping 48 matching lines @@
   // returns 0.
   GLenum GetColorAttachmentTextureType() const;
 
   // Verify all the rules in OpenGL ES 2.0.25 4.4.5 are followed.
   // Returns GL_FRAMEBUFFER_COMPLETE if there are no reasons we know we can't
   // use this combination of attachments. Otherwise returns the value
   // that glCheckFramebufferStatus should return for this set of attachments.
   // Note that receiving GL_FRAMEBUFFER_COMPLETE from this function does
   // not mean the real OpenGL will consider it framebuffer complete. It just
   // means it passed our tests.
-  GLenum IsPossiblyComplete() const;
+  GLenum IsPossiblyComplete(bool allow_float_color_attachment) const;
 
   // Implements optimized glGetFramebufferStatus.
   GLenum GetStatus(TextureManager* texture_manager, GLenum target) const;
 
   // Check all attachments are cleared
   bool IsCleared() const;
 
   GLenum GetDrawBuffer(GLenum draw_buffer) const;
 
   void SetDrawBuffers(GLsizei n, const GLenum* bufs);
@@ skipping 161 matching lines @@
   typedef std::vector<TextureDetachObserver*> TextureDetachObserverVector;
   TextureDetachObserverVector texture_detach_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_