diff options
Diffstat (limited to 'tests/manual/qopenglcontext/qopenglcontextwindow.cpp')
-rw-r--r-- | tests/manual/qopenglcontext/qopenglcontextwindow.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/tests/manual/qopenglcontext/qopenglcontextwindow.cpp b/tests/manual/qopenglcontext/qopenglcontextwindow.cpp new file mode 100644 index 0000000000..bf6fe30c00 --- /dev/null +++ b/tests/manual/qopenglcontext/qopenglcontextwindow.cpp @@ -0,0 +1,173 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the test suite 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qopenglcontextwindow.h" +#include <QtGui/QOpenGLFunctions> +#include <QtGui/QOffscreenSurface> +#include <QtGui/QGuiApplication> +#include <QtGui/QMatrix4x4> +#include <qpa/qplatformnativeinterface.h> + +#include <QtPlatformSupport/private/qeglconvenience_p.h> +#include <QtPlatformHeaders/QEGLNativeContext> + +QOpenGLContextWindow::QOpenGLContextWindow() + : m_blitter(0) +{ + setSurfaceType(OpenGLSurface); + + m_context = new QOpenGLContext(this); + m_context->setFormat(requestedFormat()); + m_context->create(); + + m_image = QImage(QStringLiteral("qticon64.png")).convertToFormat(QImage::Format_RGBA8888); + Q_ASSERT(!m_image.isNull()); + + create(); // to make sure format() returns something real + createForeignContext(); +} + +QOpenGLContextWindow::~QOpenGLContextWindow() +{ + if (m_blitter) { + m_blitter->destroy(); // the dtor does not call this for some reason + delete m_blitter; + } +} + +void QOpenGLContextWindow::render() +{ + if (!m_context->makeCurrent(this)) + qFatal("makeCurrent() failed"); + + QOpenGLFunctions *f = m_context->functions(); + f->glViewport(0, 0, dWidth(), dHeight()); + f->glClearColor(0, 0, 0, 1); + f->glClear(GL_COLOR_BUFFER_BIT); + + if (!m_blitter) { + m_blitter = new QOpenGLTextureBlitter; + m_blitter->create(); + } + + // Draw the image. If nothing gets shown, then something went wrong with the context + // adoption or sharing was not successfully enabled. + m_blitter->bind(); + QRectF r(0, 0, dWidth(), dHeight()); + QMatrix4x4 target = QOpenGLTextureBlitter::targetTransform(QRectF(100, 100, 100, 100), r.toRect()); + m_blitter->blit(m_textureId, target, QOpenGLTextureBlitter::OriginTopLeft); + m_blitter->release(); + + m_context->swapBuffers(this); +} + +void QOpenGLContextWindow::exposeEvent(QExposeEvent *) +{ + if (isExposed()) + render(); +} + +void QOpenGLContextWindow::createForeignContext() +{ + // Here a context will be created manually. This context will share with m_context's + // underlying native context. This way the texture, that belongs to the context + // created here, will be accessible from m_context too. + + EGLContext shareCtx = m_context->nativeHandle().value<QEGLNativeContext>().context(); + Q_ASSERT(shareCtx != EGL_NO_CONTEXT); + + EGLDisplay dpy = (EGLDisplay) qGuiApp->platformNativeInterface()->nativeResourceForWindow( + QByteArrayLiteral("egldisplay"), this); + Q_ASSERT(dpy != EGL_NO_DISPLAY); + + QSurfaceFormat fmt = format(); + EGLConfig config = q_configFromGLFormat(dpy, fmt); + + QVector<EGLint> contextAttrs; + contextAttrs.append(EGL_CONTEXT_CLIENT_VERSION); + contextAttrs.append(fmt.majorVersion()); + contextAttrs.append(EGL_NONE); + switch (fmt.renderableType()) { +#ifdef EGL_VERSION_1_4 + case QSurfaceFormat::OpenGL: + eglBindAPI(EGL_OPENGL_API); + break; +#endif // EGL_VERSION_1_4 + default: + eglBindAPI(EGL_OPENGL_ES_API); + break; + } + + EGLContext ctx = eglCreateContext(dpy, config, shareCtx, contextAttrs.constData()); + Q_ASSERT(ctx != EGL_NO_CONTEXT); + + // Wrap ctx into a QOpenGLContext. + QOpenGLContext *ctxWrap = new QOpenGLContext; + ctxWrap->setNativeHandle(QVariant::fromValue<QEGLNativeContext>(QEGLNativeContext(ctx, dpy))); + ctxWrap->setShareContext(m_context); // only needed for correct bookkeeping + if (!ctxWrap->create()) + qFatal("Failed to created wrapping context"); + Q_ASSERT(ctxWrap->nativeHandle().value<QEGLNativeContext>().context() == ctx); + + QOffscreenSurface surface; + surface.setFormat(fmt); + surface.create(); + + if (!ctxWrap->makeCurrent(&surface)) + qFatal("Failed to make pbuffer surface current"); + + // Create the texture. + QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions(); + GLuint textureId = 0; + f->glGenTextures(1, &textureId); + f->glBindTexture(GL_TEXTURE_2D, textureId); + f->glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + f->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_image.width(), m_image.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, + m_image.constBits()); + Q_ASSERT(f->glGetError() == GL_NO_ERROR); + + ctxWrap->doneCurrent(); + delete ctxWrap; // ctx is not destroyed + eglDestroyContext(dpy, ctx); // resources like the texture stay alive until any context on the share list is alive + Q_ASSERT(eglGetError() == EGL_SUCCESS); + + m_textureId = textureId; +} |