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+/***************************************************************************
+**
+** Copyright (C) 2011 - 2012 Research In Motion
+** Contact: http://www.qt-project.org/
+**
+** 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 "qbbglcontext.h"
+#include "qbbrootwindow.h"
+#include "qbbscreen.h"
+#include "qbbwindow.h"
+
+#include "private/qeglconvenience_p.h"
+
+#include <QtCore/QDebug>
+#include <QtGui/QOpenGLContext>
+
+QT_BEGIN_NAMESPACE
+
+EGLDisplay QBBGLContext::ms_eglDisplay = EGL_NO_DISPLAY;
+
+static EGLenum checkEGLError(const char *msg)
+{
+ static const char *errmsg[] =
+ {
+ "EGL function succeeded",
+ "EGL is not initialized, or could not be initialized, for the specified display",
+ "EGL cannot access a requested resource",
+ "EGL failed to allocate resources for the requested operation",
+ "EGL fail to access an unrecognized attribute or attribute value was passed in an attribute list",
+ "EGLConfig argument does not name a valid EGLConfig",
+ "EGLContext argument does not name a valid EGLContext",
+ "EGL current surface of the calling thread is no longer valid",
+ "EGLDisplay argument does not name a valid EGLDisplay",
+ "EGL arguments are inconsistent",
+ "EGLNativePixmapType argument does not refer to a valid native pixmap",
+ "EGLNativeWindowType argument does not refer to a valid native window",
+ "EGL one or more argument values are invalid",
+ "EGLSurface argument does not name a valid surface configured for rendering",
+ "EGL power management event has occurred",
+ };
+ EGLenum error = eglGetError();
+ fprintf(stderr, "%s: %s\n", msg, errmsg[error - EGL_SUCCESS]);
+ return error;
+}
+
+QBBGLContext::QBBGLContext(QOpenGLContext *glContext)
+ : QPlatformOpenGLContext(),
+ m_glContext(glContext),
+ m_eglSurface(EGL_NO_SURFACE)
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+ QSurfaceFormat format = m_glContext->format();
+
+ // Set current rendering API
+ EGLBoolean eglResult = eglBindAPI(EGL_OPENGL_ES_API);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to set EGL API, err=%d", eglGetError());
+ }
+
+ // Get colour channel sizes from window format
+ int alphaSize = format.alphaBufferSize();
+ int redSize = format.redBufferSize();
+ int greenSize = format.greenBufferSize();
+ int blueSize = format.blueBufferSize();
+
+ // Check if all channels are don't care
+ if (alphaSize == -1 && redSize == -1 && greenSize == -1 && blueSize == -1) {
+ // Set colour channels based on depth of window's screen
+ QBBScreen *screen = static_cast<QBBScreen*>(QBBScreen::screens().first());
+ int depth = screen->depth();
+ if (depth == 32) {
+ // SCREEN_FORMAT_RGBA8888
+ alphaSize = 8;
+ redSize = 8;
+ greenSize = 8;
+ blueSize = 8;
+ } else {
+ // SCREEN_FORMAT_RGB565
+ alphaSize = 0;
+ redSize = 5;
+ greenSize = 6;
+ blueSize = 5;
+ }
+ } else {
+ // Choose best match based on supported pixel formats
+ if (alphaSize <= 0 && redSize <= 5 && greenSize <= 6 && blueSize <= 5) {
+ // SCREEN_FORMAT_RGB565
+ alphaSize = 0;
+ redSize = 5;
+ greenSize = 6;
+ blueSize = 5;
+ } else {
+ // SCREEN_FORMAT_RGBA8888
+ alphaSize = 8;
+ redSize = 8;
+ greenSize = 8;
+ blueSize = 8;
+ }
+ }
+
+ // Update colour channel sizes in window format
+ format.setAlphaBufferSize(alphaSize);
+ format.setRedBufferSize(redSize);
+ format.setGreenBufferSize(greenSize);
+ format.setBlueBufferSize(blueSize);
+ format.setSamples(2);
+
+ // Select EGL config based on requested window format
+ m_eglConfig = q_configFromGLFormat(ms_eglDisplay, format);
+ if (m_eglConfig == 0) {
+ qFatal("QBB: failed to find EGL config");
+ }
+
+ m_eglContext = eglCreateContext(ms_eglDisplay, m_eglConfig, EGL_NO_CONTEXT, contextAttrs());
+ if (m_eglContext == EGL_NO_CONTEXT) {
+ checkEGLError("eglCreateContext");
+ qFatal("QBB: failed to create EGL context, err=%d", eglGetError());
+ }
+
+ // Query/cache window format of selected EGL config
+ m_windowFormat = q_glFormatFromConfig(ms_eglDisplay, m_eglConfig);
+}
+
+QBBGLContext::~QBBGLContext()
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+
+ // Cleanup EGL context if it exists
+ if (m_eglContext != EGL_NO_CONTEXT) {
+ eglDestroyContext(ms_eglDisplay, m_eglContext);
+ }
+
+ // Cleanup EGL surface if it exists
+ destroySurface();
+}
+
+void QBBGLContext::initialize()
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+ // Initialize connection to EGL
+ ms_eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ if (ms_eglDisplay == EGL_NO_DISPLAY) {
+ checkEGLError("eglGetDisplay");
+ qFatal("QBB: failed to obtain EGL display");
+ }
+
+ EGLBoolean eglResult = eglInitialize(ms_eglDisplay, 0, 0);
+ if (eglResult != EGL_TRUE) {
+ checkEGLError("eglInitialize");
+ qFatal("QBB: failed to initialize EGL display, err=%d", eglGetError());
+ }
+}
+
+void QBBGLContext::shutdown()
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+ // Close connection to EGL
+ eglTerminate(ms_eglDisplay);
+}
+
+bool QBBGLContext::makeCurrent(QPlatformSurface *surface)
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+ // Set current rendering API
+ EGLBoolean eglResult = eglBindAPI(EGL_OPENGL_ES_API);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to set EGL API, err=%d", eglGetError());
+ }
+
+ if (m_eglSurface == EGL_NO_SURFACE)
+ createSurface(surface);
+
+ eglResult = eglMakeCurrent(ms_eglDisplay, m_eglSurface, m_eglSurface, m_eglContext);
+ if (eglResult != EGL_TRUE) {
+ checkEGLError("eglMakeCurrent");
+ qFatal("QBB: failed to set current EGL context, err=%d", eglGetError());
+ }
+ return (eglResult == EGL_TRUE);
+}
+
+void QBBGLContext::doneCurrent()
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+ // set current rendering API
+ EGLBoolean eglResult = eglBindAPI(EGL_OPENGL_ES_API);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to set EGL API, err=%d", eglGetError());
+ }
+
+ // clear curent EGL context and unbind EGL surface
+ eglResult = eglMakeCurrent(ms_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to clear current EGL context, err=%d", eglGetError());
+ }
+}
+
+void QBBGLContext::swapBuffers(QPlatformSurface *surface)
+{
+ Q_UNUSED(surface);
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+
+ // Set current rendering API
+ EGLBoolean eglResult = eglBindAPI(EGL_OPENGL_ES_API);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to set EGL API, err=%d", eglGetError());
+ }
+
+ // Post EGL surface to window
+ eglResult = eglSwapBuffers(ms_eglDisplay, m_eglSurface);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to swap EGL buffers, err=%d", eglGetError());
+ }
+}
+
+QFunctionPointer QBBGLContext::getProcAddress(const QByteArray &procName)
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+
+ // Set current rendering API
+ EGLBoolean eglResult = eglBindAPI(EGL_OPENGL_ES_API);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to set EGL API, err=%d", eglGetError());
+ }
+
+ // Lookup EGL extension function pointer
+ return static_cast<QFunctionPointer>(eglGetProcAddress(procName.constData()));
+}
+
+EGLint *QBBGLContext::contextAttrs()
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+
+ // Choose EGL settings based on OpenGL version
+#if defined(QT_OPENGL_ES_2)
+ static EGLint attrs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
+ return attrs;
+#else
+ return 0;
+#endif
+}
+
+bool QBBGLContext::isCurrent() const
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+ return (eglGetCurrentContext() == m_eglContext);
+}
+
+void QBBGLContext::createSurface(QPlatformSurface *surface)
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+ // Get a pointer to the corresponding platform window
+ QBBWindow *platformWindow = dynamic_cast<QBBWindow*>(surface);
+ if (!platformWindow) {
+ qFatal("QBB: unable to create EGLSurface without a QBBWindow");
+ }
+
+ // If the platform window does not yet have any buffers, we create
+ // a temporary set of buffers with a size of 1x1 pixels. This will
+ // suffice until such time as the platform window has obtained
+ // buffers of the proper size
+ if (!platformWindow->hasBuffers()) {
+ platformWindow->setPlatformOpenGLContext(this);
+ m_surfaceSize = platformWindow->geometry().size();
+ platformWindow->setBufferSize(m_surfaceSize);
+ }
+
+ // Obtain the native handle for our window
+ screen_window_t handle = platformWindow->nativeHandle();
+
+ const EGLint eglSurfaceAttrs[] =
+ {
+ EGL_RENDER_BUFFER, EGL_BACK_BUFFER,
+ EGL_NONE
+ };
+
+ // Create EGL surface
+ m_eglSurface = eglCreateWindowSurface(ms_eglDisplay, m_eglConfig, (EGLNativeWindowType) handle, eglSurfaceAttrs);
+ if (m_eglSurface == EGL_NO_SURFACE) {
+ checkEGLError("eglCreateWindowSurface");
+ qFatal("QBB: failed to create EGL surface, err=%d", eglGetError());
+ }
+}
+
+void QBBGLContext::destroySurface()
+{
+#if defined(QBBGLCONTEXT_DEBUG)
+ qDebug() << Q_FUNC_INFO;
+#endif
+
+ // Destroy EGL surface if it exists
+ if (m_eglSurface != EGL_NO_SURFACE) {
+ EGLBoolean eglResult = eglDestroySurface(ms_eglDisplay, m_eglSurface);
+ if (eglResult != EGL_TRUE) {
+ qFatal("QBB: failed to destroy EGL surface, err=%d", eglGetError());
+ }
+ }
+}
+
+QT_END_NAMESPACE