dom/canvas/WebGLBuffer.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef WEBGL_BUFFER_H_
   7 #define WEBGL_BUFFER_H_
   8
   9 #include <map>
  10
  11 #include "CacheInvalidator.h"
  12 #include "GLDefs.h"
  13 #include "WebGLObjectModel.h"
  14 #include "WebGLTypes.h"
  15
  16 namespace mozilla {
  17
  18 class WebGLBuffer final : public WebGLContextBoundObject {
  19   friend class WebGLContext;
  20   friend class WebGL2Context;
  21   friend class WebGLMemoryTracker;
  22   friend class WebGLTexture;
  23
  24   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(WebGLBuffer, override)
  25
  26  public:
  27   enum class Kind { Undefined, ElementArray, OtherData };
  28
  29   WebGLBuffer(WebGLContext* webgl, GLuint buf);
  30
  31   void SetContentAfterBind(GLenum target);
  32   Kind Content() const { return mContent; }
  33
  34   size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
  35
  36   GLenum Usage() const { return mUsage; }
  37   size_t ByteLength() const { return mByteLength; }
  38
  39   Maybe<uint32_t> GetIndexedFetchMaxVert(GLenum type, uint64_t byteOffset,
  40                                          uint32_t indexCount) const;
  41   bool ValidateRange(size_t byteOffset, size_t byteLen) const;
  42
  43   bool ValidateCanBindToTarget(GLenum target);
  44   void BufferData(GLenum target, uint64_t size, const void* data, GLenum usage);
  45   void BufferSubData(GLenum target, uint64_t dstByteOffset, uint64_t dataLen,
  46                      const void* data, bool unsynchronized = false) const;
  47
  48   ////
  49
  50   const GLenum mGLName;
  51
  52  protected:
  53   ~WebGLBuffer() override;
  54
  55   void InvalidateCacheRange(uint64_t byteOffset, uint64_t byteLength) const;
  56
  57   Kind mContent = Kind::Undefined;
  58   GLenum mUsage = LOCAL_GL_STATIC_DRAW;
  59   size_t mByteLength = 0;
  60   mutable uint64_t mLastUpdateFenceId = 0;
  61
  62   struct IndexRange final {
  63     GLenum type;
  64     uint64_t byteOffset;
  65     uint32_t indexCount;
  66
  67     bool operator<(const IndexRange& x) const {
  68       if (type != x.type) return type < x.type;
  69
  70       if (byteOffset != x.byteOffset) return byteOffset < x.byteOffset;
  71
  72       return indexCount < x.indexCount;
  73     }
  74   };
  75
  76   UniqueBuffer mIndexCache;
  77   mutable std::map<IndexRange, Maybe<uint32_t>> mIndexRanges;
  78
  79  public:
  80   CacheInvalidator mFetchInvalidator;
  81
  82   void ResetLastUpdateFenceId() const;
  83 };
  84
  85 }  // namespace mozilla
  86
  87 #endif  // WEBGL_BUFFER_H_