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// 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.
// This file contains the ContextState class.
#ifndef GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
#define GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
#include <vector>
#include "base/logging.h"
#include "gpu/command_buffer/service/gl_utils.h"
#include "gpu/command_buffer/service/buffer_manager.h"
#include "gpu/command_buffer/service/framebuffer_manager.h"
#include "gpu/command_buffer/service/program_manager.h"
#include "gpu/command_buffer/service/query_manager.h"
#include "gpu/command_buffer/service/renderbuffer_manager.h"
#include "gpu/command_buffer/service/texture_manager.h"
#include "gpu/command_buffer/service/vertex_attrib_manager.h"
#include "gpu/command_buffer/service/vertex_array_manager.h"
#include "gpu/gpu_export.h"
namespace gpu {
namespace gles2 {
// State associated with each texture unit.
struct GPU_EXPORT TextureUnit {
TextureUnit();
~TextureUnit();
// The last target that was bound to this texture unit.
GLenum bind_target;
// texture currently bound to this unit's GL_TEXTURE_2D with glBindTexture
TextureManager::TextureInfo::Ref bound_texture_2d;
// texture currently bound to this unit's GL_TEXTURE_CUBE_MAP with
// glBindTexture
TextureManager::TextureInfo::Ref bound_texture_cube_map;
// texture currently bound to this unit's GL_TEXTURE_EXTERNAL_OES with
// glBindTexture
TextureManager::TextureInfo::Ref bound_texture_external_oes;
// texture currently bound to this unit's GL_TEXTURE_RECTANGLE_ARB with
// glBindTexture
TextureManager::TextureInfo::Ref bound_texture_rectangle_arb;
TextureManager::TextureInfo::Ref GetInfoForSamplerType(GLenum type) {
DCHECK(type == GL_SAMPLER_2D || type == GL_SAMPLER_CUBE ||
type == GL_SAMPLER_EXTERNAL_OES || type == GL_SAMPLER_2D_RECT_ARB);
switch (type) {
case GL_SAMPLER_2D:
return bound_texture_2d;
case GL_SAMPLER_CUBE:
return bound_texture_cube_map;
case GL_SAMPLER_EXTERNAL_OES:
return bound_texture_external_oes;
case GL_SAMPLER_2D_RECT_ARB:
return bound_texture_rectangle_arb;
}
NOTREACHED();
return NULL;
}
void Unbind(TextureManager::TextureInfo* texture) {
if (bound_texture_2d == texture) {
bound_texture_2d = NULL;
}
if (bound_texture_cube_map == texture) {
bound_texture_cube_map = NULL;
}
if (bound_texture_external_oes == texture) {
bound_texture_external_oes = NULL;
}
}
};
struct GPU_EXPORT ContextState {
ContextState();
~ContextState();
void Initialize();
void RestoreState() const;
void InitCapabilities() const;
void InitState() const;
#include "gpu/command_buffer/service/context_state_autogen.h"
EnableFlags enable_flags;
// pack alignment as last set by glPixelStorei
GLint pack_alignment;
// unpack alignment as last set by glPixelStorei
GLint unpack_alignment;
// Current active texture by 0 - n index.
// In other words, if we call glActiveTexture(GL_TEXTURE2) this value would
// be 2.
GLuint active_texture_unit;
// The currently bound array buffer. If this is 0 it is illegal to call
// glVertexAttribPointer.
BufferManager::BufferInfo::Ref bound_array_buffer;
// Which textures are bound to texture units through glActiveTexture.
std::vector<TextureUnit> texture_units;
// Class that manages vertex attribs.
VertexAttribManager::Ref vertex_attrib_manager;
// The program in use by glUseProgram
ProgramManager::ProgramInfo::Ref current_program;
// The currently bound framebuffers
FramebufferManager::FramebufferInfo::Ref bound_read_framebuffer;
FramebufferManager::FramebufferInfo::Ref bound_draw_framebuffer;
// The currently bound renderbuffer
RenderbufferManager::RenderbufferInfo::Ref bound_renderbuffer;
QueryManager::Query::Ref current_query;
GLenum hint_generate_mipmap;
GLenum hint_fragment_shader_derivative;
bool pack_reverse_row_order;
};
} // namespace gles2
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_STATE_H_
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