diff options
Diffstat (limited to 'src/quick/scenegraph/util/qsgopenglatlastexture_p.h')
-rw-r--r-- | src/quick/scenegraph/util/qsgopenglatlastexture_p.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/quick/scenegraph/util/qsgopenglatlastexture_p.h b/src/quick/scenegraph/util/qsgopenglatlastexture_p.h new file mode 100644 index 0000000000..f8dd7cdf02 --- /dev/null +++ b/src/quick/scenegraph/util/qsgopenglatlastexture_p.h @@ -0,0 +1,206 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQuick module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QSGOPENGLATLASTEXTURE_P_H +#define QSGOPENGLATLASTEXTURE_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <QtCore/QSize> + +#include <QtGui/qopengl.h> + +#include <QtQuick/QSGTexture> +#include <QtQuick/private/qsgplaintexture_p.h> +#include <QtQuick/private/qsgareaallocator_p.h> + +QT_BEGIN_NAMESPACE + +namespace QSGCompressedAtlasTexture { + class Atlas; +} +class QSGCompressedTextureFactory; + +namespace QSGOpenGLAtlasTexture +{ + +class Texture; +class TextureBase; +class Atlas; + +class Manager : public QObject +{ + Q_OBJECT + +public: + Manager(const QSize &surfacePixelSize); + ~Manager(); + + QSGTexture *create(const QImage &image, bool hasAlphaChannel); + QSGTexture *create(const QSGCompressedTextureFactory *factory); + void invalidate(); + +private: + Atlas *m_atlas; + // set of atlases for different compressed formats + QHash<unsigned int, QSGCompressedAtlasTexture::Atlas*> m_atlases; + + QSize m_atlas_size; + int m_atlas_size_limit; +}; + +class AtlasBase : public QObject +{ + Q_OBJECT +public: + AtlasBase(const QSize &size); + ~AtlasBase(); + + void invalidate(); + + int textureId() const; + void bind(QSGTexture::Filtering filtering); + + void remove(TextureBase *t); + + QSize size() const { return m_size; } + +protected: + virtual void generateTexture() = 0; + virtual void uploadPendingTexture(int i) = 0; + +protected: + QSGAreaAllocator m_allocator; + unsigned int m_texture_id; + QSize m_size; + QList<TextureBase *> m_pending_uploads; + +private: + bool m_allocated; +}; + +class Atlas : public AtlasBase +{ +public: + Atlas(const QSize &size); + ~Atlas(); + + void generateTexture() override; + void uploadPendingTexture(int i) override; + + void upload(Texture *texture); + void uploadBgra(Texture *texture); + + Texture *create(const QImage &image); + + uint internalFormat() const { return m_internalFormat; } + uint externalFormat() const { return m_externalFormat; } + +private: + uint m_internalFormat; + uint m_externalFormat; + + int m_atlas_transient_image_threshold; + + uint m_use_bgra_fallback: 1; + uint m_debug_overlay : 1; +}; + +class TextureBase : public QSGTexture +{ + Q_OBJECT +public: + TextureBase(AtlasBase *atlas, const QRect &textureRect); + ~TextureBase(); + + int textureId() const override { return m_atlas->textureId(); } + bool isAtlasTexture() const override { return true; } + + QRect atlasSubRect() const { return m_allocated_rect; } + + void bind() override; + +protected: + QRect m_allocated_rect; + AtlasBase *m_atlas; +}; + +class Texture : public TextureBase +{ + Q_OBJECT +public: + Texture(Atlas *atlas, const QRect &textureRect, const QImage &image); + ~Texture(); + + QSize textureSize() const override { return atlasSubRectWithoutPadding().size(); } + void setHasAlphaChannel(bool alpha) { m_has_alpha = alpha; } + bool hasAlphaChannel() const override { return m_has_alpha; } + bool hasMipmaps() const override { return false; } + + QRectF normalizedTextureSubRect() const override { return m_texture_coords_rect; } + + QRect atlasSubRect() const { return m_allocated_rect; } + QRect atlasSubRectWithoutPadding() const { return m_allocated_rect.adjusted(1, 1, -1, -1); } + + QSGTexture *removedFromAtlas() const override; + + void releaseImage() { m_image = QImage(); } + const QImage &image() const { return m_image; } + +private: + QRectF m_texture_coords_rect; + QImage m_image; + mutable QSGPlainTexture *m_nonatlas_texture; + bool m_has_alpha; +}; + +} + +QT_END_NAMESPACE + +#endif |