wraitii
f7aa7ac79e
By adding a custom function in Grid, the code gets vectorised on both gcc and clang, resulting in much faster code and faster update times, sometimes substantially (on giant maps or when few chunks must be updated). Reviewed By: mimo Differential Revision: https://code.wildfiregames.com/D73 This was SVN commit r20630.
91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/* Copyright (C) 2011 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "lib/ogl.h"
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#include "maths/Matrix3D.h"
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class CSimulation2;
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template<typename T>
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class Grid;
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/**
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* Maintains the territory boundary texture, used for
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* rendering and for the minimap.
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*/
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class CTerritoryTexture
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{
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NONCOPYABLE(CTerritoryTexture);
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public:
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CTerritoryTexture(CSimulation2& simulation);
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~CTerritoryTexture();
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/**
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* Recomputes the territory texture if necessary, and binds it to the requested
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* texture unit.
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* Also switches the current active texture unit, and enables texturing on it.
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* The texture is in 32-bit BGRA format.
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*/
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void BindTexture(int unit);
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/**
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* Recomputes the territory texture if necessary, and returns the texture handle.
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* Also potentially switches the current active texture unit, and enables texturing on it.
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* The texture is in 32-bit BGRA format.
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*/
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GLuint GetTexture();
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/**
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* Returns a matrix to map (x,y,z) world coordinates onto (u,v) texture
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* coordinates, in the form expected by glLoadMatrixf.
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* This must only be called after BindTexture.
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*/
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const float* GetTextureMatrix();
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/**
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* Returns a matrix to map (0,0)-(1,1) texture coordinates onto texture
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* coordinates, in the form expected by glLoadMatrixf.
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* This must only be called after BindTexture.
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*/
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const CMatrix3D* GetMinimapTextureMatrix();
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private:
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/**
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* Returns true if the territory state has changed since the last call to this function
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*/
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bool UpdateDirty();
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void DeleteTexture();
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void ConstructTexture(int unit);
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void RecomputeTexture(int unit);
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void GenerateBitmap(const Grid<u8>& territories, u8* bitmap, ssize_t w, ssize_t h);
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CSimulation2& m_Simulation;
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size_t m_DirtyID;
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GLuint m_Texture;
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ssize_t m_MapSize; // tiles per side
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GLsizei m_TextureSize; // texels per side
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CMatrix3D m_TextureMatrix;
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CMatrix3D m_MinimapTextureMatrix;
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};
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