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Diffstat (limited to 'src/platformsupport/platformcompositor/qopenglcompositor.cpp')
| -rw-r--r-- | src/platformsupport/platformcompositor/qopenglcompositor.cpp | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/src/platformsupport/platformcompositor/qopenglcompositor.cpp b/src/platformsupport/platformcompositor/qopenglcompositor.cpp deleted file mode 100644 index abfaca3f9c..0000000000 --- a/src/platformsupport/platformcompositor/qopenglcompositor.cpp +++ /dev/null @@ -1,308 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the plugins 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 <QtOpenGL/QOpenGLFramebufferObject> -#include <QtGui/QOpenGLContext> -#include <QtGui/QWindow> -#include <qpa/qplatformbackingstore.h> - -#include "qopenglcompositor_p.h" - -QT_BEGIN_NAMESPACE - -/*! - \class QOpenGLCompositor - \brief A generic OpenGL-based compositor - \since 5.4 - \internal - \ingroup qpa - - This class provides a lightweight compositor that maintains the - basic stacking order of windows and composites them by drawing - textured quads via OpenGL. - - It it meant to be used by platform plugins that run without a - windowing system. - - It is up to the platform plugin to manage the lifetime of the - compositor (instance(), destroy()), set the correct destination - context and window as early as possible (setTarget()), - register the composited windows as they are shown, activated, - raised and lowered (addWindow(), moveToTop(), etc.), and to - schedule repaints (update()). - - \note To get support for QWidget-based windows, just use - QOpenGLCompositorBackingStore. It will automatically create - textures from the raster-rendered content and trigger the - necessary repaints. - */ - -static QOpenGLCompositor *compositor = 0; - -QOpenGLCompositor::QOpenGLCompositor() - : m_context(0), - m_targetWindow(0), - m_rotation(0) -{ - Q_ASSERT(!compositor); - m_updateTimer.setSingleShot(true); - m_updateTimer.setInterval(0); - connect(&m_updateTimer, SIGNAL(timeout()), SLOT(handleRenderAllRequest())); -} - -QOpenGLCompositor::~QOpenGLCompositor() -{ - Q_ASSERT(compositor == this); - m_blitter.destroy(); - compositor = 0; -} - -void QOpenGLCompositor::setTarget(QOpenGLContext *context, QWindow *targetWindow, - const QRect &nativeTargetGeometry) -{ - m_context = context; - m_targetWindow = targetWindow; - m_nativeTargetGeometry = nativeTargetGeometry; -} - -void QOpenGLCompositor::setRotation(int degrees) -{ - m_rotation = degrees; - m_rotationMatrix.setToIdentity(); - m_rotationMatrix.rotate(degrees, 0, 0, 1); -} - -void QOpenGLCompositor::update() -{ - if (!m_updateTimer.isActive()) - m_updateTimer.start(); -} - -QImage QOpenGLCompositor::grab() -{ - Q_ASSERT(m_context && m_targetWindow); - m_context->makeCurrent(m_targetWindow); - QScopedPointer<QOpenGLFramebufferObject> fbo(new QOpenGLFramebufferObject(m_nativeTargetGeometry.size())); - renderAll(fbo.data()); - return fbo->toImage(); -} - -void QOpenGLCompositor::handleRenderAllRequest() -{ - Q_ASSERT(m_context && m_targetWindow); - m_context->makeCurrent(m_targetWindow); - renderAll(0); -} - -void QOpenGLCompositor::renderAll(QOpenGLFramebufferObject *fbo) -{ - if (fbo) - fbo->bind(); - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); - glViewport(0, 0, m_nativeTargetGeometry.width(), m_nativeTargetGeometry.height()); - - if (!m_blitter.isCreated()) - m_blitter.create(); - - m_blitter.bind(); - - for (int i = 0; i < m_windows.size(); ++i) - m_windows.at(i)->beginCompositing(); - - for (int i = 0; i < m_windows.size(); ++i) - render(m_windows.at(i)); - - m_blitter.release(); - if (!fbo) - m_context->swapBuffers(m_targetWindow); - else - fbo->release(); - - for (int i = 0; i < m_windows.size(); ++i) - m_windows.at(i)->endCompositing(); -} - -struct BlendStateBinder -{ - BlendStateBinder() : m_blend(false) { - glDisable(GL_BLEND); - } - void set(bool blend) { - if (blend != m_blend) { - if (blend) { - glEnable(GL_BLEND); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - } else { - glDisable(GL_BLEND); - } - m_blend = blend; - } - } - ~BlendStateBinder() { - if (m_blend) - glDisable(GL_BLEND); - } - bool m_blend; -}; - -static inline QRect toBottomLeftRect(const QRect &topLeftRect, int windowHeight) -{ - return QRect(topLeftRect.x(), windowHeight - topLeftRect.bottomRight().y() - 1, - topLeftRect.width(), topLeftRect.height()); -} - -static void clippedBlit(const QPlatformTextureList *textures, int idx, const QRect &sourceWindowRect, - const QRect &targetWindowRect, - QOpenGLTextureBlitter *blitter, QMatrix4x4 *rotationMatrix) -{ - const QRect clipRect = textures->clipRect(idx); - if (clipRect.isEmpty()) - return; - - const QRect rectInWindow = textures->geometry(idx).translated(sourceWindowRect.topLeft()); - const QRect clippedRectInWindow = rectInWindow & clipRect.translated(rectInWindow.topLeft()); - const QRect srcRect = toBottomLeftRect(clipRect, rectInWindow.height()); - - QMatrix4x4 target = QOpenGLTextureBlitter::targetTransform(clippedRectInWindow, targetWindowRect); - if (rotationMatrix) - target = *rotationMatrix * target; - - const QMatrix3x3 source = QOpenGLTextureBlitter::sourceTransform(srcRect, rectInWindow.size(), - QOpenGLTextureBlitter::OriginBottomLeft); - - blitter->blit(textures->textureId(idx), target, source); -} - -void QOpenGLCompositor::render(QOpenGLCompositorWindow *window) -{ - const QPlatformTextureList *textures = window->textures(); - if (!textures) - return; - - const QRect targetWindowRect(QPoint(0, 0), m_targetWindow->geometry().size()); - float currentOpacity = 1.0f; - BlendStateBinder blend; - const QRect sourceWindowRect = window->sourceWindow()->geometry(); - for (int i = 0; i < textures->count(); ++i) { - uint textureId = textures->textureId(i); - const float opacity = window->sourceWindow()->opacity(); - if (opacity != currentOpacity) { - currentOpacity = opacity; - m_blitter.setOpacity(currentOpacity); - } - - if (textures->count() > 1 && i == textures->count() - 1) { - // Backingstore for a widget with QOpenGLWidget subwidgets - blend.set(true); - QMatrix4x4 target = QOpenGLTextureBlitter::targetTransform(textures->geometry(i), targetWindowRect); - if (m_rotation) - target = m_rotationMatrix * target; - m_blitter.blit(textureId, target, QOpenGLTextureBlitter::OriginTopLeft); - } else if (textures->count() == 1) { - // A regular QWidget window - const bool translucent = window->sourceWindow()->requestedFormat().alphaBufferSize() > 0; - blend.set(translucent); - QMatrix4x4 target = QOpenGLTextureBlitter::targetTransform(textures->geometry(i), targetWindowRect); - if (m_rotation) - target = m_rotationMatrix * target; - m_blitter.blit(textureId, target, QOpenGLTextureBlitter::OriginTopLeft); - } else if (!textures->flags(i).testFlag(QPlatformTextureList::StacksOnTop)) { - // Texture from an FBO belonging to a QOpenGLWidget or QQuickWidget - blend.set(false); - clippedBlit(textures, i, sourceWindowRect, targetWindowRect, &m_blitter, m_rotation ? &m_rotationMatrix : nullptr); - } - } - - for (int i = 0; i < textures->count(); ++i) { - if (textures->flags(i).testFlag(QPlatformTextureList::StacksOnTop)) { - blend.set(true); - clippedBlit(textures, i, sourceWindowRect, targetWindowRect, &m_blitter, m_rotation ? &m_rotationMatrix : nullptr); - } - } - - m_blitter.setOpacity(1.0f); -} - -QOpenGLCompositor *QOpenGLCompositor::instance() -{ - if (!compositor) - compositor = new QOpenGLCompositor; - return compositor; -} - -void QOpenGLCompositor::destroy() -{ - delete compositor; - compositor = 0; -} - -void QOpenGLCompositor::addWindow(QOpenGLCompositorWindow *window) -{ - if (!m_windows.contains(window)) { - m_windows.append(window); - emit topWindowChanged(window); - } -} - -void QOpenGLCompositor::removeWindow(QOpenGLCompositorWindow *window) -{ - m_windows.removeOne(window); - if (!m_windows.isEmpty()) - emit topWindowChanged(m_windows.last()); -} - -void QOpenGLCompositor::moveToTop(QOpenGLCompositorWindow *window) -{ - m_windows.removeOne(window); - m_windows.append(window); - emit topWindowChanged(window); -} - -void QOpenGLCompositor::changeWindowIndex(QOpenGLCompositorWindow *window, int newIdx) -{ - int idx = m_windows.indexOf(window); - if (idx != -1 && idx != newIdx) { - m_windows.move(idx, newIdx); - if (newIdx == m_windows.size() - 1) - emit topWindowChanged(m_windows.last()); - } -} - -QT_END_NAMESPACE |