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89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
/* ResidualVM - A 3D game interpreter
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*
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* ResidualVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef GRAPHICS_OPENGL_CONTEXT_H
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#define GRAPHICS_OPENGL_CONTEXT_H
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#include "common/singleton.h"
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namespace OpenGL {
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enum ContextType {
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kContextGL,
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kContextGLES2
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};
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/**
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* Description structure of the OpenGL (ES) context.
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*
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* This class is based on LordHoto's OpenGL backend for ScummVM
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*/
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class Context : public Common::Singleton<Context> {
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public:
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Context();
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/**
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* Initialize the context description from currently active context.
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*
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* The extensions and features are marked as available according
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* to the current context capabilities.
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*/
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void initialize(ContextType contextType);
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/**
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* Reset context.
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*
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* This marks all extensions as unavailable.
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*/
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void reset();
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/** The type of the active context. */
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ContextType type;
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/** The maximum texture size supported by the context. */
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int maxTextureSize;
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/** Whether GL_ARB_texture_non_power_of_two is available or not. */
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bool NPOTSupported;
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/** Whether shader support is available or not. */
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bool shadersSupported;
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/** Whether FBO support is available or not. */
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bool framebufferObjectSupported;
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/** Whether packing the depth and stencil buffers is possible or not. */
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bool packedDepthStencilSupported;
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/** Whether specifying a pitch when uploading to textures is available or not */
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bool unpackSubImageSupported;
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int getGLSLVersion() const;
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};
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} // End of namespace OpenGL
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/** Shortcut for accessing the active OpenGL context. */
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#define OpenGLContext OpenGL::Context::instance()
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#endif
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