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   ~VertexArrayObjectManager();
  31
  32   bool IsReservedId(GLuint id) const;
  33
  34   // Binds an element array.
  35   // Returns true if service should be called.
  36   bool BindElementArray(GLuint id);
  37
  38   // Unbind buffer.
  39   void UnbindBuffer(GLuint id);
  40
  41   // Geneates array objects for the given ids.
  42   void GenVertexArrays(GLsizei n, const GLuint* arrays);
  43
  44   // Deletes array objects for the given ids.
  45   void DeleteVertexArrays(GLsizei n, const GLuint* arrays);
  46
  47   // Binds a vertex array.
  48   // changed will be set to true if the service should be called.
  49   // Returns false if array is an unknown id.
  50   bool BindVertexArray(GLuint array, bool* changed);
  51
  52   // simulated will be set to true if buffers were simulated.
  53   // Returns true service should be called.
  54   bool SetupSimulatedClientSideBuffers(
  55       const char* function_name,
  56       GLES2Implementation* gl,
  57       GLES2CmdHelper* gl_helper,
  58       GLsizei num_elements,
  59       GLsizei primcount,
  60       bool* simulated);
  61
  62   // Returns true if buffers were setup.
  63   bool SetupSimulatedIndexAndClientSideBuffers(
  64       const char* function_name,
  65       GLES2Implementation* gl,
  66       GLES2CmdHelper* gl_helper,
  67       GLsizei count,
  68       GLenum type,
  69       GLsizei primcount,
  70       const void* indices,
  71       GLuint* offset,
  72       bool* simulated);
  73
  74   bool HaveEnabledClientSideBuffers() const;
  75
  76   void SetAttribEnable(GLuint index, bool enabled);
  77
  78   bool GetVertexAttrib(GLuint index, GLenum pname, uint32* param);
  79
  80   bool GetAttribPointer(GLuint index, GLenum pname, void** ptr) const;
  81
  82   // Returns false if error.
  83   bool SetAttribPointer(
  84       GLuint buffer_id,
  85       GLuint index,
  86       GLint size,
  87       GLenum type,
  88       GLboolean normalized,
  89       GLsizei stride,
  90       const void* ptr);
  91
  92   void SetAttribDivisor(GLuint index, GLuint divisor);
  93
  94   GLuint bound_element_array_buffer() const;
  95
  96  private:
  97   typedef base::hash_map<GLuint, VertexArrayObject*> VertexArrayObjectMap;
  98
  99   bool IsDefaultVAOBound() const;
 100
 101   GLsizei CollectData(const void* data,
 102                       GLsizei bytes_per_element,
 103                       GLsizei real_stride,
 104                       GLsizei num_elements);
 105
 106   GLuint max_vertex_attribs_;
 107   GLuint array_buffer_id_;
 108   GLsizei array_buffer_size_;
 109   GLsizei array_buffer_offset_;
 110   GLuint element_array_buffer_id_;
 111   GLsizei element_array_buffer_size_;
 112   GLsizei collection_buffer_size_;
 113   scoped_ptr<int8[]> collection_buffer_;
 114
 115   VertexArrayObject* default_vertex_array_object_;
 116   VertexArrayObject* bound_vertex_array_object_;
 117   VertexArrayObjectMap vertex_array_objects_;
 118
 119   DISALLOW_COPY_AND_ASSIGN(VertexArrayObjectManager);
 120 };
 121
 122 }  // namespace gles2
 123 }  // namespace gpu
 124
 125 #endif  // GPU_COMMAND_BUFFER_CLIENT_VERTEX_ARRAY_OBJECT_MANAGER_H_
 126