gpu/command_buffer/client/vertex_array_object_manager.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef GPU_COMMAND_BUFFER_CLIENT_VERTEX_ARRAY_OBJECT_MANAGER_H_
   6 #define GPU_COMMAND_BUFFER_CLIENT_VERTEX_ARRAY_OBJECT_MANAGER_H_
   7
   8 #include <GLES2/gl2.h>
   9
  10 #include "base/containers/hash_tables.h"
  11 #include "base/macros.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "gles2_impl_export.h"
  14
  15 namespace gpu {
  16 namespace gles2 {
  17
  18 class GLES2Implementation;
  19 class GLES2CmdHelper;
  20 class VertexArrayObject;
  21
  22 // VertexArrayObjectManager manages vertex array objects on the client side
  23 // of the command buffer.
  24 class GLES2_IMPL_EXPORT VertexArrayObjectManager {
  25  public:
  26   VertexArrayObjectManager(
  27       GLuint max_vertex_attribs,
  28       GLuint array_buffer_id,
  29       GLuint element_array_buffer_id,
  30       bool support_client_side_arrays);
  31   ~VertexArrayObjectManager();
  32
  33   bool IsReservedId(GLuint id) const;
  34
  35   // Binds an element array.
  36   // Returns true if service should be called.
  37   bool BindElementArray(GLuint id);
  38
  39   // Unbind buffer.
  40   void UnbindBuffer(GLuint id);
  41
  42   // Geneates array objects for the given ids.
  43   void GenVertexArrays(GLsizei n, const GLuint* arrays);
  44
  45   // Deletes array objects for the given ids.
  46   void DeleteVertexArrays(GLsizei n, const GLuint* arrays);
  47
  48   // Binds a vertex array.
  49   // changed will be set to true if the service should be called.
  50   // Returns false if array is an unknown id.
  51   bool BindVertexArray(GLuint array, bool* changed);
  52
  53   // simulated will be set to true if buffers were simulated.
  54   // Returns true service should be called.
  55   bool SetupSimulatedClientSideBuffers(
  56       const char* function_name,
  57       GLES2Implementation* gl,
  58       GLES2CmdHelper* gl_helper,
  59       GLsizei num_elements,
  60       GLsizei primcount,
  61       bool* simulated);
  62
  63   // Returns true if buffers were setup.
  64   bool SetupSimulatedIndexAndClientSideBuffers(
  65       const char* function_name,
  66       GLES2Implementation* gl,
  67       GLES2CmdHelper* gl_helper,
  68       GLsizei count,
  69       GLenum type,
  70       GLsizei primcount,
  71       const void* indices,
  72       GLuint* offset,
  73       bool* simulated);
  74
  75   bool HaveEnabledClientSideBuffers() const;
  76
  77   void SetAttribEnable(GLuint index, bool enabled);
  78
  79   bool GetVertexAttrib(GLuint index, GLenum pname, uint32* param);
  80
  81   bool GetAttribPointer(GLuint index, GLenum pname, void** ptr) const;
  82
  83   // Returns false if error.
  84   bool SetAttribPointer(
  85       GLuint buffer_id,
  86       GLuint index,
  87       GLint size,
  88       GLenum type,
  89       GLboolean normalized,
  90       GLsizei stride,
  91       const void* ptr);
  92
  93   void SetAttribDivisor(GLuint index, GLuint divisor);
  94
  95   GLuint bound_element_array_buffer() const;
  96
  97  private:
  98   typedef base::hash_map<GLuint, VertexArrayObject*> VertexArrayObjectMap;
  99
 100   bool IsDefaultVAOBound() const;
 101
 102   GLsizei CollectData(const void* data,
 103                       GLsizei bytes_per_element,
 104                       GLsizei real_stride,
 105                       GLsizei num_elements);
 106
 107   GLuint max_vertex_attribs_;
 108   GLuint array_buffer_id_;
 109   GLsizei array_buffer_size_;
 110   GLsizei array_buffer_offset_;
 111   GLuint element_array_buffer_id_;
 112   GLsizei element_array_buffer_size_;
 113   GLsizei collection_buffer_size_;
 114   scoped_ptr<int8[]> collection_buffer_;
 115
 116   VertexArrayObject* default_vertex_array_object_;
 117   VertexArrayObject* bound_vertex_array_object_;
 118   VertexArrayObjectMap vertex_array_objects_;
 119
 120   bool support_client_side_arrays_;
 121
 122   DISALLOW_COPY_AND_ASSIGN(VertexArrayObjectManager);
 123 };
 124
 125 }  // namespace gles2
 126 }  // namespace gpu
 127
 128 #endif  // GPU_COMMAND_BUFFER_CLIENT_VERTEX_ARRAY_OBJECT_MANAGER_H_
 129