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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
commit | 940b4d1848e8c70ab7642901a68594e8016caffc (patch) | |
tree | eb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /vcl/inc/opengl/PackedTextureAtlas.hxx | |
parent | Initial commit. (diff) | |
download | libreoffice-upstream.tar.xz libreoffice-upstream.zip |
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | vcl/inc/opengl/PackedTextureAtlas.hxx | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/vcl/inc/opengl/PackedTextureAtlas.hxx b/vcl/inc/opengl/PackedTextureAtlas.hxx new file mode 100644 index 000000000..7a283aa45 --- /dev/null +++ b/vcl/inc/opengl/PackedTextureAtlas.hxx @@ -0,0 +1,57 @@ +/* -*- 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 textures into one texture 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_DLLPUBLIC PackedTextureAtlasManager final +{ + std::vector<std::unique_ptr<PackedTexture>> maPackedTextures; + + int mnTextureWidth; + int mnTextureHeight; + + void CreateNewTexture(); + + PackedTextureAtlasManager( const PackedTextureAtlasManager& ) = delete; + PackedTextureAtlasManager& operator=( const PackedTextureAtlasManager& ) = delete; + +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: */ |