53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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*/
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#ifndef INCLUDED_VCL_INC_OPENGL_PACKEDTEXTUREATLAS_HXX
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#define INCLUDED_VCL_INC_OPENGL_PACKEDTEXTUREATLAS_HXX
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#include <memory>
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#include <opengl/texture.hxx>
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struct PackedTexture;
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/**
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* Pack texutres into one texutre atlas.
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*
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* This is based on algorithm described in [1] and is an
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* adaptation of "texture atlas generator" from [2].
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*
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* [1]: http://www.blackpawn.com/texts/lightmaps/
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* [2]: https://github.com/lukaszdk/texture-atlas-generator
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*
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*/
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class VCL_PLUGIN_PUBLIC PackedTextureAtlasManager
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{
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std::vector<std::unique_ptr<PackedTexture>> maPackedTextures;
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int mnTextureWidth;
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int mnTextureHeight;
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void CreateNewTexture();
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public:
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/**
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* nTextureWidth and nTextureHeight are the dimensions of the common texture(s)
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* nTextureLimit is the maximum limit of that a texture atlas can have (0 or less - unlimited)
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*/
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PackedTextureAtlasManager(int nTextureWidth, int nTextureHeight);
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~PackedTextureAtlasManager();
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OpenGLTexture InsertBuffer(int nWidth, int nHeight, int nFormat, int nType, sal_uInt8 const * pData);
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OpenGLTexture Reserve(int nWidth, int nHeight);
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std::vector<GLuint> ReduceTextureNumber(int nMaxNumberOfTextures);
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};
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#endif // INCLUDED_VCL_INC_OPENGL_PACKEDTEXTUREATLAS_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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