diff options
Diffstat (limited to 'src/plugins/scenegraph/openvg/qopenvgoffscreensurface.cpp')
| -rw-r--r-- | src/plugins/scenegraph/openvg/qopenvgoffscreensurface.cpp | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/plugins/scenegraph/openvg/qopenvgoffscreensurface.cpp b/src/plugins/scenegraph/openvg/qopenvgoffscreensurface.cpp new file mode 100644 index 0000000000..80af227fb4 --- /dev/null +++ b/src/plugins/scenegraph/openvg/qopenvgoffscreensurface.cpp @@ -0,0 +1,123 @@ +/**************************************************************************** +** +** 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qopenvgoffscreensurface.h" + +#include <QtGui/QImage> +#include <QDebug> + +QT_BEGIN_NAMESPACE + +QOpenVGOffscreenSurface::QOpenVGOffscreenSurface(const QSize &size) + : m_size(size) +{ + m_display = eglGetCurrentDisplay(); + m_image = vgCreateImage(VG_sARGB_8888_PRE, m_size.width(), m_size.height(), VG_IMAGE_QUALITY_BETTER); + + const EGLint configAttribs[] = { + EGL_CONFORMANT, EGL_OPENVG_BIT, + EGL_SURFACE_TYPE, EGL_PBUFFER_BIT, + EGL_RED_SIZE, 8, + EGL_GREEN_SIZE, 8, + EGL_BLUE_SIZE, 8, + EGL_ALPHA_SIZE, 8, + EGL_ALPHA_MASK_SIZE, 8, + EGL_NONE + }; + + EGLConfig pbufferConfig; + EGLint numConfig; + eglChooseConfig(m_display, configAttribs, &pbufferConfig, 1, &numConfig); + + m_context = eglCreateContext(m_display, pbufferConfig, eglGetCurrentContext(), 0); + if (m_context == EGL_NO_CONTEXT) + qWarning("QOpenVGOffscreenSurface: failed to create EGLContext"); + + m_renderTarget = eglCreatePbufferFromClientBuffer(m_display, + EGL_OPENVG_IMAGE, + (EGLClientBuffer)m_image, + pbufferConfig, + 0); + if (m_renderTarget == EGL_NO_SURFACE) + qWarning("QOpenVGOffscreenSurface: failed to create EGLSurface from VGImage"); +} + +QOpenVGOffscreenSurface::~QOpenVGOffscreenSurface() +{ + vgDestroyImage(m_image); + eglDestroySurface(m_display, m_renderTarget); + eglDestroyContext(m_display, m_context); +} + +void QOpenVGOffscreenSurface::makeCurrent() +{ + EGLContext currentContext = eglGetCurrentContext(); + if (m_context != currentContext) { + m_previousContext = eglGetCurrentContext(); + m_previousReadSurface = eglGetCurrentSurface(EGL_READ); + m_previousDrawSurface = eglGetCurrentSurface(EGL_DRAW); + + eglMakeCurrent(m_display, m_renderTarget, m_renderTarget, m_context); + } +} + +void QOpenVGOffscreenSurface::doneCurrent() +{ + EGLContext currentContext = eglGetCurrentContext(); + if (m_context == currentContext) { + eglMakeCurrent(m_display, m_previousDrawSurface, m_previousReadSurface, m_previousContext); + m_previousContext = EGL_NO_CONTEXT; + m_previousReadSurface = EGL_NO_SURFACE; + m_previousDrawSurface = EGL_NO_SURFACE; + } +} + +void QOpenVGOffscreenSurface::swapBuffers() +{ + eglSwapBuffers(m_display, m_renderTarget); +} + +QImage QOpenVGOffscreenSurface::readbackQImage() +{ + QImage readbackImage(m_size, QImage::Format_ARGB32_Premultiplied); + vgGetImageSubData(m_image, readbackImage.bits(), readbackImage.bytesPerLine(), VG_sARGB_8888_PRE, 0, 0, m_size.width(), m_size.height()); + return readbackImage; +} + +QT_END_NAMESPACE |