4af00753fa
Cleanup QtWidgets examples: - use nullptr (clang-tidy) - use member-initialization - adjust the style - fix includes Change-Id: Ic5448606aacc525ea60b615a69227017aa2b821a Reviewed-by: Paul Wicking <paul.wicking@qt.io>
114 lines
4.2 KiB
C++
114 lines
4.2 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "fbopaintdevice.h"
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#include <QOffscreenSurface>
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#include <QOpenGLFunctions>
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QFboPaintDevice::QFboPaintDevice(const QSize &size, bool flipped, bool clearOnInit,
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QOpenGLFramebufferObject::Attachment attachment)
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: QOpenGLPaintDevice(size)
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{
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QOpenGLFramebufferObjectFormat format;
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format.setAttachment(attachment);
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format.setSamples(4);
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m_framebufferObject = new QOpenGLFramebufferObject(size, format);
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QOffscreenSurface *surface = new QOffscreenSurface();
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surface->create();
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m_surface = surface;
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setPaintFlipped(flipped);
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if (clearOnInit) {
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m_framebufferObject->bind();
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context()->functions()->glClearColor(0, 0, 0, 0);
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context()->functions()->glClear(GL_COLOR_BUFFER_BIT);
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}
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}
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QFboPaintDevice::~QFboPaintDevice()
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{
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delete m_framebufferObject;
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delete m_surface;
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}
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void QFboPaintDevice::ensureActiveTarget()
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{
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if (QOpenGLContext::currentContext() != context())
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context()->makeCurrent(m_surface);
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m_framebufferObject->bind();
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}
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GLuint QFboPaintDevice::takeTexture()
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{
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// We have multisamples so we can't just forward takeTexture().
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QOpenGLFramebufferObject resolvedFbo(m_framebufferObject->size(), m_framebufferObject->attachment());
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QOpenGLFramebufferObject::blitFramebuffer(&resolvedFbo, m_framebufferObject);
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return resolvedFbo.takeTexture();
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}
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QImage QFboPaintDevice::toImage() const
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{
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QOpenGLContext *currentContext = QOpenGLContext::currentContext();
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QSurface *currentSurface = currentContext ? currentContext->surface() : nullptr;
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context()->makeCurrent(m_surface);
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QImage image = m_framebufferObject->toImage(!paintFlipped());
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if (currentContext)
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currentContext->makeCurrent(currentSurface);
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else
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context()->doneCurrent();
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return image;
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}
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