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