Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #include <QDebug>
++ #include "qopenvgoffscreensurface.h"
++
++ #include <QtGui/QImage>
++
++
++ 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,
++ reinterpret_cast<EGLClientBuffer>(uintptr_t(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