| 1 | // Copyright (C) 2020 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #include <QtGui/qoffscreensurface.h> |
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| 5 | #include "qeglpbuffer_p.h" |
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| 6 | #include "qeglconvenience_p.h" |
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| 7 | |
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| 8 | QT_BEGIN_NAMESPACE |
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| 9 | |
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| 10 | /*! |
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| 11 | \class QEGLPbuffer |
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| 12 | \brief A pbuffer-based implementation of QPlatformOffscreenSurface for EGL. |
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| 13 | \since 5.2 |
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| 14 | \internal |
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| 15 | \ingroup qpa |
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| 16 | |
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| 17 | To use this implementation in the platform plugin simply |
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| 18 | reimplement QPlatformIntegration::createPlatformOffscreenSurface() |
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| 19 | and return a new instance of this class. |
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| 20 | */ |
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| 21 | |
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| 22 | QEGLPbuffer::QEGLPbuffer(EGLDisplay display, const QSurfaceFormat &format, QOffscreenSurface *offscreenSurface, |
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| 23 | QEGLPlatformContext::Flags flags) |
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| 24 | : QPlatformOffscreenSurface(offscreenSurface) |
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| 25 | , m_format(format) |
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| 26 | , m_display(display) |
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| 27 | , m_pbuffer(EGL_NO_SURFACE) |
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| 28 | { |
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| 29 | m_hasSurfaceless = !flags.testFlag(flag: QEGLPlatformContext::NoSurfaceless) |
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| 30 | && q_hasEglExtension(display, extensionName: "EGL_KHR_surfaceless_context" ); |
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| 31 | |
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| 32 | if (m_hasSurfaceless) |
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| 33 | return; |
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| 34 | |
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| 35 | EGLConfig config = q_configFromGLFormat(display: m_display, format: m_format, highestPixelFormat: false, EGL_PBUFFER_BIT); |
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| 36 | |
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| 37 | if (config) { |
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| 38 | const EGLint attributes[] = { |
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| 39 | EGL_WIDTH, offscreenSurface->size().width(), |
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| 40 | EGL_HEIGHT, offscreenSurface->size().height(), |
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| 41 | EGL_LARGEST_PBUFFER, EGL_FALSE, |
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| 42 | EGL_NONE |
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| 43 | }; |
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| 44 | |
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| 45 | m_pbuffer = eglCreatePbufferSurface(dpy: m_display, config, attrib_list: attributes); |
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| 46 | |
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| 47 | if (m_pbuffer != EGL_NO_SURFACE) |
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| 48 | m_format = q_glFormatFromConfig(display: m_display, config); |
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| 49 | } |
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| 50 | } |
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| 51 | |
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| 52 | QEGLPbuffer::~QEGLPbuffer() |
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| 53 | { |
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| 54 | if (m_pbuffer != EGL_NO_SURFACE) |
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| 55 | eglDestroySurface(dpy: m_display, surface: m_pbuffer); |
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| 56 | } |
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| 57 | |
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| 58 | bool QEGLPbuffer::isValid() const |
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| 59 | { |
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| 60 | return m_pbuffer != EGL_NO_SURFACE || m_hasSurfaceless; |
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| 61 | } |
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| 62 | |
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| 63 | QT_END_NAMESPACE |
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| 64 | |
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