140 lines
4.5 KiB
C++
140 lines
4.5 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2013-2016 CERN
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* Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* @author Maciej Suminski <maciej.suminski@cern.ch>
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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, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file opengl_compositor.h
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* Handle multitarget rendering (ie. to different textures/surfaces) and later compositing
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* into a single image (OpenGL flavor).
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*/
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#ifndef OPENGL_COMPOSITOR_H_
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#define OPENGL_COMPOSITOR_H_
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#include <gal/opengl/kiglew.h> // Must be included first
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#include <gal/compositor.h>
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#include <gal/opengl/antialiasing.h>
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#include <gal/gal_display_options.h>
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#include <deque>
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namespace KIGFX
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{
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class OPENGL_COMPOSITOR : public COMPOSITOR
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{
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public:
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OPENGL_COMPOSITOR();
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virtual ~OPENGL_COMPOSITOR();
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/// @copydoc COMPOSITOR::Initialize()
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virtual void Initialize() override;
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/// @copydoc COMPOSITOR::Resize()
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virtual void Resize( unsigned int aWidth, unsigned int aHeight ) override;
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/// @copydoc COMPOSITOR::CreateBuffer()
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virtual unsigned int CreateBuffer() override;
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/// @copydoc COMPOSITOR::SetBuffer()
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virtual void SetBuffer( unsigned int aBufferHandle ) override;
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/// @copydoc COMPOSITOR::GetBuffer()
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inline virtual unsigned int GetBuffer() const override
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{
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if( m_curFbo == DIRECT_RENDERING )
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return DIRECT_RENDERING;
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return m_curBuffer + 1;
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}
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/// @copydoc COMPOSITOR::ClearBuffer()
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virtual void ClearBuffer( const COLOR4D& aColor ) override;
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/// @copydoc COMPOSITOR::DrawBuffer()
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virtual void DrawBuffer( unsigned int aBufferHandle ) override;
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/// @copydoc COMPOSITOR::Begin()
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virtual void Begin() override;
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// @copydoc COMPOSITOR::Present()
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virtual void Present() override;
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// Constant used by glBindFramebuffer to turn off rendering to framebuffers
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static const unsigned int DIRECT_RENDERING = 0;
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VECTOR2U GetScreenSize() const;
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GLenum GetBufferTexture( unsigned int aBufferHandle );
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void DrawBuffer( unsigned int aSourceHandle, unsigned int aDestHandle );
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unsigned int CreateBuffer( VECTOR2U aDimensions );
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void SetAntialiasingMode( OPENGL_ANTIALIASING_MODE aMode ); // clears all buffers
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OPENGL_ANTIALIASING_MODE GetAntialiasingMode() const;
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int GetAntialiasSupersamplingFactor() const;
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VECTOR2D GetAntialiasRenderingOffset() const;
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protected:
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/// Binds a specific Framebuffer Object.
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void bindFb( unsigned int aFb );
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/**
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* Perform freeing of resources.
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*/
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void clean();
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/// Returns number of used buffers
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inline unsigned int usedBuffers()
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{
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return m_buffers.size();
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}
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// Buffers are simply textures storing a result of certain target rendering.
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typedef struct
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{
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VECTOR2U dimensions;
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GLuint textureTarget; ///< Main texture handle
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GLuint attachmentPoint; ///< Point to which an image from texture is attached
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} OPENGL_BUFFER;
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bool m_initialized; ///< Initialization status flag
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unsigned int m_curBuffer; ///< Currently used buffer handle
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GLuint m_mainFbo; ///< Main FBO handle (storing all target textures)
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GLuint m_depthBuffer; ///< Depth buffer handle
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typedef std::deque<OPENGL_BUFFER> OPENGL_BUFFERS;
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/// Stores information about initialized buffers
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OPENGL_BUFFERS m_buffers;
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/// Store the used FBO name in case there was more than one compositor used
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GLuint m_curFbo;
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OPENGL_ANTIALIASING_MODE m_currentAntialiasingMode;
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std::unique_ptr<OPENGL_PRESENTOR> m_antialiasing;
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};
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} // namespace KIGFX
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#endif /* COMPOSITOR_H_ */
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