/* * This program source code file is part of KiCad, a free EDA CAD application. * * Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt> * Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.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 */ /** * @file ogl_attr_list.cpp * @brief Implements a attribute list support for openGL */ #include "ogl_attr_list.h" #include <wx/glcanvas.h> #include <wx/debug.h> #include <core/arraydim.h> const int OGL_ATT_LIST::m_openGL_attributes_list[] = { // Boolean attributes (using itself at padding): // 0 1 WX_GL_RGBA, WX_GL_RGBA, // 2 3 WX_GL_DOUBLEBUFFER, WX_GL_DOUBLEBUFFER, // Normal attributes with values: // 4 5 WX_GL_DEPTH_SIZE, 16, // 6 7 WX_GL_STENCIL_SIZE, 8, // This ones need to be the last in the list (as the tags will set to 0 if AA fails) // 8 9 WX_GL_SAMPLES, 0, // Disable AA for the start. //10 11 WX_GL_SAMPLE_BUFFERS, 1, // Enable multisampling support (antialiasing). 0, 0 // NULL termination }; #define ATT_WX_GL_SAMPLES_OFFSET 8 #define ATT_WX_GL_SAMPLES_OFFSET_DATA 9 #define ATT_WX_GL_SAMPLE_BUFFERS_OFFSET 10 #define ATT_WX_GL_SAMPLE_BUFFERS_DATA 11 int OGL_ATT_LIST::m_openGL_attributes_list_to_use[ arrayDim( OGL_ATT_LIST::m_openGL_attributes_list ) ] = { 0 }; const int* OGL_ATT_LIST::GetAttributesList( ANTIALIASING_MODE aAntiAliasingMode ) { wxASSERT( aAntiAliasingMode <= ANTIALIASING_MODE::AA_8X ); memcpy( m_openGL_attributes_list_to_use, m_openGL_attributes_list, sizeof( m_openGL_attributes_list_to_use ) ); if( aAntiAliasingMode > ANTIALIASING_MODE::AA_NONE ) { // There is a bug on wxGLCanvas that makes IsDisplaySupported fail // while testing for antialiasing. // http://trac.wxwidgets.org/ticket/16909 // this next code will only work after this bug is fixed // // On my experience (Mario) it was only working on Linux but failing on // Windows, so there was no AA. // Check if the canvas supports multisampling. if( wxGLCanvas::IsDisplaySupported( m_openGL_attributes_list_to_use ) ) { static const int aaSamples[4] = {0, 2, 4, 8}; // Check for possible sample sizes, start form the requested. int maxSamples = aaSamples[static_cast<int>( aAntiAliasingMode )]; m_openGL_attributes_list_to_use[ATT_WX_GL_SAMPLES_OFFSET_DATA] = maxSamples; for( ; (maxSamples > 0) && ( !wxGLCanvas::IsDisplaySupported( m_openGL_attributes_list_to_use ) ); maxSamples = maxSamples >> 1 ) { m_openGL_attributes_list_to_use[ATT_WX_GL_SAMPLES_OFFSET_DATA] = maxSamples; } } else { aAntiAliasingMode = ANTIALIASING_MODE::AA_NONE; } } // Disable antialiasing if it failed or was not requested if( aAntiAliasingMode == ANTIALIASING_MODE::AA_NONE ) { // Remove multisampling information // (hoping that the GPU driver will decide what is best) m_openGL_attributes_list_to_use[ATT_WX_GL_SAMPLES_OFFSET] = 0; m_openGL_attributes_list_to_use[ATT_WX_GL_SAMPLES_OFFSET_DATA] = 0; m_openGL_attributes_list_to_use[ATT_WX_GL_SAMPLE_BUFFERS_OFFSET] = 0; m_openGL_attributes_list_to_use[ATT_WX_GL_SAMPLE_BUFFERS_DATA] = 0; } return m_openGL_attributes_list_to_use; }