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