450be6a378
Prior to this commit we didn't know if mipmaps were going to be used when we created the GL texture, which meant that we couldn't tell the driver whether to allocate storage for mipmaps or not. This resulted in one of two things happening depending on the driver; either it would allocate storage for mipmaps that in most cases would never be used, or it wouldn't and would later be forced to reallocate the texture when mipmaps were added. By adding this parameter we can now explicitly tell the driver how many mipmap levels will be used. The parameter is only added to the non-image constructor for now. The image constructor is changed to only allocate a single level, which matches how textures created from images are used in kwin. This may need to be revisited in the future.
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2006-2007 Rivo Laks <rivolaks@hot.ee>
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Copyright (C) 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
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Copyright (C) 2011 Philipp Knechtges <philipp-dev@knechtges.com>
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_GLTEXTURE_P_H
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#define KWIN_GLTEXTURE_P_H
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#include "kwinconfig.h" // KWIN_HAVE_OPENGL
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#include <kwinglutils_export.h>
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#include <QSize>
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#include <QSharedData>
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#include <QImage>
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namespace KWin
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{
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// forward declarations
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class GLVertexBuffer;
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class KWINGLUTILS_EXPORT GLTexturePrivate
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: public QSharedData
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{
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public:
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GLTexturePrivate();
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virtual ~GLTexturePrivate();
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virtual void onDamage();
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void updateMatrix();
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GLuint m_texture;
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GLenum m_target;
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GLenum m_filter;
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GLenum m_wrapMode;
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QSize m_size;
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QSizeF m_scale; // to un-normalize GL_TEXTURE_2D
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QMatrix4x4 m_matrix[2];
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bool m_yInverted; // texture is y-inverted
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bool m_canUseMipmaps;
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bool m_markedDirty;
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bool m_filterChanged;
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bool m_wrapModeChanged;
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int m_mipLevels;
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int m_unnormalizeActive; // 0 - no, otherwise refcount
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int m_normalizeActive; // 0 - no, otherwise refcount
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GLVertexBuffer* m_vbo;
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QSize m_cachedSize;
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static void initStatic();
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static bool s_supportsFramebufferObjects;
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static bool s_supportsARGB32;
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static bool s_supportsUnpack;
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static GLuint s_fbo;
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static uint s_textureObjectCounter;
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private:
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friend void KWin::cleanupGL();
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static void cleanup();
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Q_DISABLE_COPY(GLTexturePrivate)
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};
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} // namespace
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#endif
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