QtPlatformSupport: A helper library for platform plugins

QtPlatformSupport is a static library. Platform plugins are meant to
link against this library to pull in dependencies such as fontengines
and convenience functions for finding the right GL configs. The linker
will only pull in the symbols used, so the size of the library doesn't
really matter

1 files changed, 165 insertions, 0 deletions

diff --git a/src/platformsupport/eglconvenience/qeglplatformcontext.cpp b/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
new file mode 100644
index 0000000000..bb2d167c81
--- /dev/null
+++ b/src/platformsupport/eglconvenience/qeglplatformcontext.cpp
@@ -0,0 +1,165 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qeglplatformcontext_p.h"
+
+#include "qeglconvenience_p.h"
+
+#include <QtGui/QPlatformWindow>
+
+#include <EGL/egl.h>
+
+QEGLSurface::QEGLSurface(EGLSurface surface, const QGuiGLFormat &format)
+    : QPlatformGLSurface(format)
+    , m_eglSurface(surface)
+{
+}
+
+QEGLPlatformContext::QEGLPlatformContext(const QGuiGLFormat &format, QPlatformGLContext *share, EGLDisplay display,
+                                         EGLint eglClientVersion, EGLenum eglApi)
+    : m_eglDisplay(display)
+    , m_eglApi(eglApi)
+    , m_format(format)
+{
+    EGLConfig config = q_configFromGLFormat(display, format, true);
+    m_format = q_glFormatFromConfig(display, config);
+
+    EGLContext shareContext = share ? static_cast<QEGLPlatformContext *>(share)->m_eglContext : 0;
+
+    QVector<EGLint> contextAttrs;
+    contextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
+    contextAttrs.append(eglClientVersion);
+    contextAttrs.append(EGL_NONE);
+
+    eglBindAPI(m_eglApi);
+    m_eglContext = eglCreateContext(m_eglDisplay, config, shareContext, contextAttrs.constData());
+    if (m_eglContext == EGL_NO_CONTEXT) {
+        qWarning("Could not create the egl context\n");
+        eglTerminate(m_eglDisplay);
+        qFatal("EGL error");
+    }
+}
+
+bool QEGLPlatformContext::makeCurrent(const QPlatformGLSurface &surface)
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qWarning("QEglContext::makeCurrent: %p\n",this);
+#endif
+    eglBindAPI(m_eglApi);
+
+    EGLSurface eglSurface = static_cast<const QEGLSurface &>(surface).eglSurface();
+
+    bool ok = eglMakeCurrent(m_eglDisplay, eglSurface, eglSurface, m_eglContext);
+    if (!ok)
+        qWarning("QEGLPlatformContext::makeCurrent: eglError: %d, this: %p \n", eglGetError(), this);
+#ifdef QEGL_EXTRA_DEBUG
+    static bool showDebug = true;
+    if (showDebug) {
+        showDebug = false;
+        const char *str = (const char*)glGetString(GL_VENDOR);
+        qWarning("Vendor %s\n", str);
+        str = (const char*)glGetString(GL_RENDERER);
+        qWarning("Renderer %s\n", str);
+        str = (const char*)glGetString(GL_VERSION);
+        qWarning("Version %s\n", str);
+
+        str = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
+        qWarning("Extensions %s\n",str);
+
+        str = (const char*)glGetString(GL_EXTENSIONS);
+        qWarning("Extensions %s\n", str);
+
+    }
+#endif
+    return ok;
+}
+
+QEGLPlatformContext::~QEGLPlatformContext()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qWarning("QEglContext::~QEglContext(): %p\n",this);
+#endif
+    if (m_eglContext != EGL_NO_CONTEXT) {
+        eglDestroyContext(m_eglDisplay, m_eglContext);
+        m_eglContext = EGL_NO_CONTEXT;
+    }
+}
+
+void QEGLPlatformContext::doneCurrent()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qWarning("QEglContext::doneCurrent:%p\n",this);
+#endif
+    eglBindAPI(m_eglApi);
+    bool ok = eglMakeCurrent(m_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    if (!ok)
+        qWarning("QEGLPlatformContext::doneCurrent(): eglError: %d, this: %p \n", eglGetError(), this);
+}
+
+void QEGLPlatformContext::swapBuffers(const QPlatformGLSurface &surface)
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qWarning("QEglContext::swapBuffers:%p\n",this);
+#endif
+    eglBindAPI(m_eglApi);
+    bool ok = eglSwapBuffers(m_eglDisplay, static_cast<const QEGLSurface &>(surface).eglSurface());
+    if (!ok)
+        qWarning("QEGLPlatformContext::swapBuffers(): eglError: %d, this: %p \n", eglGetError(), this);
+}
+
+void (*QEGLPlatformContext::getProcAddress(const QByteArray &procName)) ()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qWarning("QEglContext::getProcAddress%p\n",this);
+#endif
+    eglBindAPI(m_eglApi);
+    return eglGetProcAddress(procName.constData());
+}
+
+QGuiGLFormat QEGLPlatformContext::format() const
+{
+    return m_format;
+}
+
+EGLContext QEGLPlatformContext::eglContext() const
+{
+    return m_eglContext;
+}