diff options
author | Michael Brasser <michael.brasser@live.com> | 2017-11-07 20:07:34 -0600 |
---|---|---|
committer | Simon Hausmann <simon.hausmann@qt.io> | 2018-01-31 08:13:31 +0000 |
commit | 07f9ca1759e35f1eb497fe2f1ad4b7ba71b69b5c (patch) | |
tree | 5dd23f1f31ac3df199572c3add1f25972ec4ec69 /src/quick/scenegraph/compressedtexture | |
parent | eace041161a03a849d3896af65493b7885cecc04 (diff) |
Basic working compressed texture atlas
This adds experimental automatic atlasing of ETC-compressed textures
(to be expanded to additional formats), similar to existing atlas
support of QImages. It is off by default, and can be enabled with
QSG_ENABLE_COMPRESSED_ATLAS=1.
[ChangeLog] Add experimental automatic atlasing of ETC-compressed
textures (can be enabled with QSG_ENABLE_COMPRESSED_ATLAS=1)
Change-Id: Ia66971f51299d082a569bdfaadb662a3e522bd79
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Diffstat (limited to 'src/quick/scenegraph/compressedtexture')
4 files changed, 306 insertions, 1 deletions
diff --git a/src/quick/scenegraph/compressedtexture/qsgcompressedatlastexture.cpp b/src/quick/scenegraph/compressedtexture/qsgcompressedatlastexture.cpp new file mode 100644 index 0000000000..301f2826dc --- /dev/null +++ b/src/quick/scenegraph/compressedtexture/qsgcompressedatlastexture.cpp @@ -0,0 +1,174 @@ +/**************************************************************************** +** +** Copyright (C) 2018 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qsgcompressedatlastexture_p.h" + +#include <QtCore/QVarLengthArray> +#include <QtCore/QElapsedTimer> +#include <QtCore/QtMath> + +#include <QtGui/QOpenGLContext> +#include <QtGui/QGuiApplication> +#include <QtGui/QScreen> +#include <QtGui/QSurface> +#include <QtGui/QWindow> +#include <QtGui/QOpenGLFunctions> +#include <QtGui/QOpenGLTexture> +#include <QDebug> + +#include <private/qqmlglobal_p.h> +#include <private/qquickprofiler_p.h> +#include <private/qsgtexture_p.h> +#include <private/qsgcompressedtexture_p.h> +#include <private/qsgpkmhandler_p.h> + +QT_BEGIN_NAMESPACE + +static QElapsedTimer qsg_renderer_timer; + +namespace QSGCompressedAtlasTexture +{ + +Atlas::Atlas(const QSize &size, uint format) + : QSGAtlasTexture::AtlasBase(size) + , m_format(format) +{ +} + +Atlas::~Atlas() +{ +} + +Texture *Atlas::create(const QByteArray &data, int dataLength, int dataOffset, const QSize &size, const QSize &paddedSize) +{ + // No need to lock, as manager already locked it. + QRect rect = m_allocator.allocate(paddedSize); + if (rect.width() > 0 && rect.height() > 0) { + Texture *t = new Texture(this, rect, data, dataLength, dataOffset, size); + m_pending_uploads << t; + return t; + } + return 0; +} + +void Atlas::generateTexture() +{ + QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions(); + funcs->glCompressedTexImage2D(GL_TEXTURE_2D, 0, m_format, + m_size.width(), m_size.height(), 0, + (m_size.width() * m_size.height()) / 2, + 0); +} + +void Atlas::uploadPendingTexture(int i) +{ + Texture *texture = static_cast<Texture*>(m_pending_uploads.at(i)); + + const QRect &r = texture->atlasSubRect(); + + QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions(); + funcs->glCompressedTexSubImage2D(GL_TEXTURE_2D, 0, + r.x(), r.y(), r.width(), r.height(), m_format, + texture->sizeInBytes(), + texture->data().constData() + texture->dataOffset()); + + qCDebug(QSG_LOG_TIME_TEXTURE).nospace() << "compressed atlastexture uploaded in: " << qsg_renderer_timer.elapsed() + << "ms (" << texture->textureSize().width() << "x" + << texture->textureSize().height() << ")"; + + // TODO: consider releasing the data (as is done in the regular atlas)? + // The advantage of keeping this data around is that it makes it much easier + // to remove the texture from the atlas +} + +Texture::Texture(Atlas *atlas, const QRect &textureRect, const QByteArray &data, int dataLength, int dataOffset, const QSize &size) + : QSGAtlasTexture::TextureBase(atlas, textureRect) + , m_nonatlas_texture(0) + , m_data(data) + , m_size(size) + , m_dataLength(dataLength) + , m_dataOffset(dataOffset) +{ + float w = atlas->size().width(); + float h = atlas->size().height(); + QRect nopad = atlasSubRect(); + // offset by half-pixel to prevent bleeding when scaling + m_texture_coords_rect = QRectF((nopad.x() + .5) / w, + (nopad.y() + .5) / h, + (nopad.width() - 1.) / w, + (nopad.height() - 1.) / h); +} + +Texture::~Texture() +{ + delete m_nonatlas_texture; +} + +bool Texture::hasAlphaChannel() const +{ + return QSGCompressedTexture::formatIsOpaque(static_cast<Atlas*>(m_atlas)->format()); +} + +QSGTexture *Texture::removedFromAtlas() const +{ + if (m_nonatlas_texture) { + m_nonatlas_texture->setMipmapFiltering(mipmapFiltering()); + m_nonatlas_texture->setFiltering(filtering()); + return m_nonatlas_texture; + } + + if (!m_data.isEmpty()) { + QSGCompressedTexture::DataPtr texData(QSGCompressedTexture::DataPtr::create()); + texData->data = m_data; + texData->size = m_size; + texData->format = static_cast<Atlas*>(m_atlas)->format(); + texData->hasAlpha = hasAlphaChannel(); + texData->dataLength = m_dataLength; + texData->dataOffset = m_dataOffset; + m_nonatlas_texture = new QSGCompressedTexture(texData); + m_nonatlas_texture->setMipmapFiltering(mipmapFiltering()); + m_nonatlas_texture->setFiltering(filtering()); + } + + return m_nonatlas_texture; +} + +} + +QT_END_NAMESPACE diff --git a/src/quick/scenegraph/compressedtexture/qsgcompressedatlastexture_p.h b/src/quick/scenegraph/compressedtexture/qsgcompressedatlastexture_p.h new file mode 100644 index 0000000000..59e935b623 --- /dev/null +++ b/src/quick/scenegraph/compressedtexture/qsgcompressedatlastexture_p.h @@ -0,0 +1,119 @@ +/**************************************************************************** +** +** Copyright (C) 2018 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 QSGCOMPRESSEDATLASTEXTURE_P_H +#define QSGCOMPRESSEDATLASTEXTURE_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/qsgareaallocator_p.h> +#include <QtQuick/private/qsgatlastexture_p.h> + +QT_BEGIN_NAMESPACE + +class QSGCompressedTextureFactory; + +namespace QSGCompressedAtlasTexture { + +class Texture; + +class Atlas : public QSGAtlasTexture::AtlasBase +{ +public: + Atlas(const QSize &size, uint format); + ~Atlas(); + + void generateTexture() override; + void uploadPendingTexture(int i) override; + + Texture *create(const QByteArray &data, int dataLength, int dataOffset, const QSize &size, const QSize &paddedSize); + + uint format() const { return m_format; } + +private: + uint m_format; +}; + +class Texture : public QSGAtlasTexture::TextureBase +{ + Q_OBJECT +public: + Texture(Atlas *atlas, const QRect &textureRect, const QByteArray &data, int dataLength, int dataOffset, const QSize &size); + ~Texture(); + + QSize textureSize() const override { return m_size; } + bool hasAlphaChannel() const override; + bool hasMipmaps() const override { return false; } + + QRectF normalizedTextureSubRect() const override { return m_texture_coords_rect; } + + QSGTexture *removedFromAtlas() const override; + + const QByteArray &data() const { return m_data; } + int sizeInBytes() const { return m_dataLength; } + int dataOffset() const { return m_dataOffset; } + +private: + QRectF m_texture_coords_rect; + mutable QSGTexture *m_nonatlas_texture; + QByteArray m_data; + QSize m_size; + int m_dataLength; + int m_dataOffset; +}; + +} + +QT_END_NAMESPACE + +#endif diff --git a/src/quick/scenegraph/compressedtexture/qsgcompressedtexture.cpp b/src/quick/scenegraph/compressedtexture/qsgcompressedtexture.cpp index 6d51ed9d61..839c562989 100644 --- a/src/quick/scenegraph/compressedtexture/qsgcompressedtexture.cpp +++ b/src/quick/scenegraph/compressedtexture/qsgcompressedtexture.cpp @@ -43,6 +43,7 @@ #include <QOpenGLTexture> #include <QOpenGLFunctions> #include <QDebug> +#include <QtQuick/private/qquickwindow_p.h> QT_BEGIN_NAMESPACE @@ -215,11 +216,17 @@ QSGCompressedTextureFactory::QSGCompressedTextureFactory(const QSGCompressedText { } -QSGTexture *QSGCompressedTextureFactory::createTexture(QQuickWindow *) const +QSGTexture *QSGCompressedTextureFactory::createTexture(QQuickWindow *window) const { if (!m_textureData || !m_textureData->isValid()) return nullptr; + // attempt to atlas the texture + QSGRenderContext *context = QQuickWindowPrivate::get(window)->context; + QSGTexture *t = context->compressedTextureForFactory(this); + if (t) + return t; + return new QSGCompressedTexture(m_textureData); } diff --git a/src/quick/scenegraph/compressedtexture/qsgcompressedtexture_p.h b/src/quick/scenegraph/compressedtexture/qsgcompressedtexture_p.h index dfedac5558..aa87316809 100644 --- a/src/quick/scenegraph/compressedtexture/qsgcompressedtexture_p.h +++ b/src/quick/scenegraph/compressedtexture/qsgcompressedtexture_p.h @@ -103,6 +103,9 @@ protected: bool m_uploaded = false; }; +namespace QSGAtlasTexture { + class Manager; +} class Q_QUICK_PRIVATE_EXPORT QSGCompressedTextureFactory : public QQuickTextureFactory { @@ -114,6 +117,8 @@ public: protected: QSGCompressedTexture::DataPtr m_textureData; +private: + friend class QSGAtlasTexture::Manager; }; QT_END_NAMESPACE |