kicad/include/gal/opengl/vertex_common.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* 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 vertex_common.h
* @brief Common defines and consts used in vertex related classes.
*/
#ifndef VERTEX_COMMON_H_
#define VERTEX_COMMON_H_
#include <gal/opengl/kiglew.h> // Must be included first
#include <math/vector2d.h>
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#include <cstddef>
namespace KIGFX
{
///< Possible types of shaders (keep consistent with the actual shader source in
///< gl_builtin_shaders.cpp).
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enum SHADER_MODE
{
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SHADER_NONE = 0,
SHADER_FILLED_CIRCLE = 2,
SHADER_STROKED_CIRCLE = 3,
SHADER_FONT = 4,
SHADER_LINE_A = 5,
SHADER_LINE_B = 6,
SHADER_LINE_C = 7,
SHADER_LINE_D = 8,
SHADER_LINE_E = 9,
SHADER_LINE_F = 10
};
///< Data structure for vertices {X,Y,Z,R,G,B,A,shader&param}
struct VERTEX
{
GLfloat x, y, z; // Coordinates
GLubyte r, g, b, a; // Color
GLfloat shader[4]; // Shader type & params
};
static constexpr size_t VERTEX_SIZE = sizeof(VERTEX);
static constexpr size_t VERTEX_STRIDE = VERTEX_SIZE / sizeof(GLfloat);
static constexpr size_t COORD_OFFSET = offsetof(VERTEX, x);
static constexpr size_t COORD_SIZE = sizeof(VERTEX::x) + sizeof(VERTEX::y) + sizeof(VERTEX::z);
static constexpr size_t COORD_STRIDE = COORD_SIZE / sizeof(GLfloat);
static constexpr size_t COLOR_OFFSET = offsetof(VERTEX, r);
static constexpr size_t COLOR_SIZE = sizeof(VERTEX::r) + sizeof(VERTEX::g) + sizeof(VERTEX::b) + sizeof(VERTEX::a);
static constexpr size_t COLOR_STRIDE = COLOR_SIZE / sizeof(GLubyte);
// Shader attributes
static constexpr size_t SHADER_OFFSET = offsetof(VERTEX, shader);
static constexpr size_t SHADER_SIZE = sizeof(VERTEX::shader);
static constexpr size_t SHADER_STRIDE = SHADER_SIZE / sizeof(GLfloat);
static constexpr size_t INDEX_SIZE = sizeof(GLuint);
} // namespace KIGFX
#endif /* VERTEX_COMMON_H_ */