antialiasing.h

Go to the documentation of this file.

/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2016 Kicad Developers, see change_log.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
 
#ifndef OPENGL_ANTIALIASING_H__
#define OPENGL_ANTIALIASING_H__
 
#include <memory>
#include <gal/opengl/shader.h>
#include <math/vector2d.h>
 
namespace KIGFX {
 
 class OPENGL_COMPOSITOR;
 
 class OPENGL_PRESENTOR
 {
 public:
 virtual ~OPENGL_PRESENTOR()
 {
 }
 
 virtual bool Init() = 0;
 virtual unsigned int CreateBuffer() = 0;
 
 virtual VECTOR2I GetInternalBufferSize() = 0;
 virtual void OnLostBuffers() = 0;
 
 virtual void Begin() = 0;
 virtual void DrawBuffer( GLuint aBuffer ) = 0;
 virtual void Present() = 0;
 };
 
 
 class ANTIALIASING_NONE : public OPENGL_PRESENTOR
 {
 public:
 ANTIALIASING_NONE( OPENGL_COMPOSITOR* aCompositor );
 
 bool Init() override;
 unsigned int CreateBuffer() override;
 
 VECTOR2I GetInternalBufferSize() override;
 void OnLostBuffers() override;
 
 void Begin() override;
 void DrawBuffer( GLuint aBuffer ) override;
 void Present() override;
 
 private:
 OPENGL_COMPOSITOR* compositor;
 };
 
 
 class ANTIALIASING_SUPERSAMPLING : public OPENGL_PRESENTOR
 {
 public:
 ANTIALIASING_SUPERSAMPLING( OPENGL_COMPOSITOR* aCompositor );
 
 bool Init() override;
 unsigned int CreateBuffer() override;
 
 VECTOR2I GetInternalBufferSize() override;
 void OnLostBuffers() override;
 
 void Begin() override;
 void DrawBuffer( GLuint ) override;
 void Present() override;
 
 private:
 OPENGL_COMPOSITOR* compositor;
 
 unsigned int ssaaMainBuffer;
 bool areBuffersCreated;
 
 bool areShadersCreated;
 };
 
 class ANTIALIASING_SMAA : public OPENGL_PRESENTOR
 {
 public:
 ANTIALIASING_SMAA( OPENGL_COMPOSITOR* aCompositor );
 
 bool Init() override;
 unsigned int CreateBuffer () override;
 
 VECTOR2I GetInternalBufferSize() override;
 void OnLostBuffers() override;
 
 void Begin() override;
 void DrawBuffer( GLuint buffer ) override;
 void Present() override;
 
 private:
 void loadShaders();
 void updateUniforms();
 
 bool areBuffersInitialized;
 
 unsigned int smaaBaseBuffer; // base + overlay temporary
 unsigned int smaaEdgesBuffer;
 unsigned int smaaBlendBuffer;
 
 // smaa shader lookup textures
 unsigned int smaaAreaTex;
 unsigned int smaaSearchTex;
 
 bool shadersLoaded;
 
 std::unique_ptr<SHADER> pass_1_shader;
 GLint pass_1_metrics;
 
 std::unique_ptr<SHADER> pass_2_shader;
 GLint pass_2_metrics;
 
 std::unique_ptr<SHADER> pass_3_shader;
 GLint pass_3_metrics;
 
 OPENGL_COMPOSITOR* compositor;
 };
 
}
 
#endif