Add full-screen EGL-based GL backend

QGLWidget doesn't work yet

4 files changed, 625 insertions, 0 deletions

diff --git a/src/plugins/platforms/eglfs/eglintegration.cpp b/src/plugins/platforms/eglfs/eglintegration.cpp
new file mode 100644
index 0000000..5ea0bb2
--- /dev/null
+++ b/src/plugins/platforms/eglfs/eglintegration.cpp
@@ -0,0 +1,469 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "eglintegration.h"
+
+#include <QtGui/QPlatformWindow>
+#include <QtOpenGL/private/qwindowsurface_gl_p.h>
+#include <QtOpenGL/private/qpixmapdata_gl_p.h>
+#include <QtOpenGL/private/qpaintengine_opengl_p.h>
+
+#include <stdio.h>
+#include <EGL/egl.h>
+#include <QDebug>
+#include <QWindowSystemInterface>
+
+#include "../eglconvenience/qeglconvenience.h"
+
+//#define QEGL_EXTRA_DEBUG
+#ifdef QEGL_EXTRA_DEBUG
+struct AttrInfo { EGLint attr; const char *name; };
+static struct AttrInfo attrs[] = {
+    {EGL_BUFFER_SIZE, "EGL_BUFFER_SIZE"},
+    {EGL_ALPHA_SIZE, "EGL_ALPHA_SIZE"},
+    {EGL_BLUE_SIZE, "EGL_BLUE_SIZE"},
+    {EGL_GREEN_SIZE, "EGL_GREEN_SIZE"},
+    {EGL_RED_SIZE, "EGL_RED_SIZE"},
+    {EGL_DEPTH_SIZE, "EGL_DEPTH_SIZE"},
+    {EGL_STENCIL_SIZE, "EGL_STENCIL_SIZE"},
+    {EGL_CONFIG_CAVEAT, "EGL_CONFIG_CAVEAT"},
+    {EGL_CONFIG_ID, "EGL_CONFIG_ID"},
+    {EGL_LEVEL, "EGL_LEVEL"},
+    {EGL_MAX_PBUFFER_HEIGHT, "EGL_MAX_PBUFFER_HEIGHT"},
+    {EGL_MAX_PBUFFER_PIXELS, "EGL_MAX_PBUFFER_PIXELS"},
+    {EGL_MAX_PBUFFER_WIDTH, "EGL_MAX_PBUFFER_WIDTH"},
+    {EGL_NATIVE_RENDERABLE, "EGL_NATIVE_RENDERABLE"},
+    {EGL_NATIVE_VISUAL_ID, "EGL_NATIVE_VISUAL_ID"},
+    {EGL_NATIVE_VISUAL_TYPE, "EGL_NATIVE_VISUAL_TYPE"},
+    {EGL_SAMPLES, "EGL_SAMPLES"},
+    {EGL_SAMPLE_BUFFERS, "EGL_SAMPLE_BUFFERS"},
+    {EGL_SURFACE_TYPE, "EGL_SURFACE_TYPE"},
+    {EGL_TRANSPARENT_TYPE, "EGL_TRANSPARENT_TYPE"},
+    {EGL_TRANSPARENT_BLUE_VALUE, "EGL_TRANSPARENT_BLUE_VALUE"},
+    {EGL_TRANSPARENT_GREEN_VALUE, "EGL_TRANSPARENT_GREEN_VALUE"},
+    {EGL_TRANSPARENT_RED_VALUE, "EGL_TRANSPARENT_RED_VALUE"},
+    {EGL_BIND_TO_TEXTURE_RGB, "EGL_BIND_TO_TEXTURE_RGB"},
+    {EGL_BIND_TO_TEXTURE_RGBA, "EGL_BIND_TO_TEXTURE_RGBA"},
+    {EGL_MIN_SWAP_INTERVAL, "EGL_MIN_SWAP_INTERVAL"},
+    {EGL_MAX_SWAP_INTERVAL, "EGL_MAX_SWAP_INTERVAL"},
+    {-1, 0}};
+#endif //QEGL_EXTRA_DEBUG
+
+
+class QEglScreen;
+
+class QEglContext : public QPlatformGLContext
+{
+public:
+    QEglContext(QGLFormat& format, QPlatformGLContext* shareContext = 0);
+    ~QEglContext();
+
+    virtual void makeCurrent();
+    virtual void doneCurrent();
+    virtual void swapBuffers();
+    virtual void* getProcAddress(const QString& procName);
+
+    EGLContext eglContext() {return m_context;}
+    QSize size() const { return m_size; }
+
+    QGLFormat format() const { return m_format; }
+private:
+
+    EGLContext  m_context;
+    EGLDisplay m_dpy;
+    EGLSurface m_surface;
+    QSize m_size;
+    static bool singleton_watch;
+    QGLFormat m_format;
+};
+
+bool QEglContext::singleton_watch = false;
+
+QEglContext::QEglContext(QGLFormat& format, QPlatformGLContext* shareContext)
+{
+    if (singleton_watch)
+        qFatal("There can be only one");
+    singleton_watch = true;
+
+    Q_UNUSED(shareContext);
+    Q_UNUSED(format);
+
+    EGLint major, minor;
+#ifdef QEGL_EXTRA_DEBUG
+    EGLint index;
+#endif
+    if (!eglBindAPI(EGL_OPENGL_ES_API)) {
+        fprintf(stderr, "Could not bind GL_ES API\n");
+        qFatal("EGL error");
+    }
+
+    m_dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (m_dpy == EGL_NO_DISPLAY) {
+        fprintf(stderr, "Could not open egl display\n");
+        qFatal("EGL error");
+    }
+    fprintf(stderr, "Opened display %p\n", m_dpy);
+
+    if (!eglInitialize(m_dpy, &major, &minor)) {
+        fprintf(stderr, "Could not initialize egl display\n");
+        qFatal("EGL error");
+    }
+
+    fprintf(stderr, "Initialized display %d %d\n", major, minor);
+
+    QPlatformWindowFormat platformFormat;
+    platformFormat.setDepth(16);
+    platformFormat.setWindowApi(QPlatformWindowFormat::OpenGL);
+    platformFormat.setRedBufferSize(5);
+    platformFormat.setGreenBufferSize(6);
+    platformFormat.setBlueBufferSize(5);
+    EGLConfig config = q_configFromQPlatformWindowFormat(m_dpy, platformFormat);
+
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "Configuration %d matches requirements\n", (int)config);
+
+    for (index = 0; attrs[index].attr != -1; ++index) {
+        EGLint value;
+        if (eglGetConfigAttrib(m_dpy, config, attrs[index].attr, &value)) {
+            printf("\t%s: %d\n", attrs[index].name, (int)value);
+        }
+    }
+    printf("\n");
+#endif
+    EGLint temp;
+    EGLint attribList[32];
+
+    temp = 0;
+
+    attribList[temp++] = EGL_CONTEXT_CLIENT_VERSION;
+    attribList[temp++] = 2; // GLES version 2
+    attribList[temp++] = EGL_NONE;
+
+
+    m_context = eglCreateContext(m_dpy, config, NULL, attribList);
+    if (m_context == EGL_NO_CONTEXT) {
+        fprintf(stderr, "Could not create the egl context\n");
+        eglTerminate(m_dpy);
+        qFatal("EGL error");
+    }
+
+    m_surface = eglCreateWindowSurface(m_dpy, config, 0, NULL);
+    if (m_surface == EGL_NO_SURFACE) {
+        fprintf(stderr, "Could not create the egl surface: error = 0x%x\n", eglGetError());
+        eglTerminate(m_dpy);
+        qFatal("EGL error");
+    }
+
+    EGLint w,h;
+
+    eglQuerySurface(m_dpy, m_surface, EGL_WIDTH, &w);
+    eglQuerySurface(m_dpy, m_surface, EGL_HEIGHT, &h);
+    fprintf(stderr, "Created surface %dx%d\n", w, h);
+
+    m_size = QSize(w,h);
+
+
+}
+
+QEglContext::~QEglContext()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qDebug() << "QEglContext::~QEglContext()";
+#endif
+}
+
+void QEglContext::makeCurrent()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglContext::makeCurrent\n");
+#endif
+    if (!eglMakeCurrent(m_dpy, m_surface, m_surface, m_context))
+        fprintf(stderr, "Could not make the egl context current\n");
+
+#ifdef QEGL_EXTRA_DEBUG
+    static bool showDebug = true;
+    if (showDebug) {
+        showDebug = false;
+        const char *str = (const char*)glGetString(GL_VENDOR);
+        qDebug() << "Vendor" << str;
+        printf("Vendor %s\n", str);
+        str = (const char*)glGetString(GL_RENDERER);
+        qDebug() << "Renderer" << str;
+        printf("Renderer %s\n", str);
+        str = (const char*)glGetString(GL_VERSION);
+        qDebug() << "Version" << str;
+        printf("Version %s\n", str);
+
+        str = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
+        qDebug() << "Shader version" << str;
+
+        str = (const char*)glGetString(GL_EXTENSIONS);
+        qDebug() << "Extensions" << str;
+        printf("Extensions %s\n", str);
+
+    }
+#endif
+}
+
+void QEglContext::doneCurrent()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglContext::doneCurrent\n");
+#endif
+    if (!eglMakeCurrent(m_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT))
+        fprintf(stderr, "Could not release the egl context\n");
+}
+
+void QEglContext::swapBuffers()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglContext::swapBuffers\n");
+#endif
+    eglSwapBuffers(m_dpy, m_surface);
+}
+
+void* QEglContext::getProcAddress(const QString& procName)
+{
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglContext::getProcAddress\n");
+#endif
+    return (void*)eglGetProcAddress(qPrintable(procName));
+}
+
+
+class QEglPaintDevice;
+class QEglScreen : public QPlatformScreen
+{
+public:
+    QEglScreen();
+    ~QEglScreen() {}
+
+    QRect geometry() const { /*qDebug() << "QEglScreen::geometry()";*/ return m_geometry; }
+    int depth() const { qDebug() << "QEglScreen::depth()"; return m_depth; }
+    QImage::Format format() const {qDebug() << "QEglScreen::format()";  return m_format; }
+    //QSize physicalSize() const { return m_physicalSize; } //###
+
+public:
+    QRect m_geometry;
+    int m_depth;
+    QImage::Format m_format;
+    //QSize m_physicalSize;
+    QEglContext * m_platformContext;
+};
+
+
+class QEglWindow : public QPlatformWindow
+{
+public:
+    QEglWindow(QWidget *w, QEglScreen *screen);
+    QPlatformGLContext *glContext();
+
+    void setGeometry(const QRect &);
+    WId winId() const;
+
+    QGLContext *context() { return m_context; }
+    QEglPaintDevice *paintDevice() {  return m_pd; }
+private:
+    QEglScreen *m_screen;
+    QEglPaintDevice *m_pd;
+    QGLContext *m_context;
+    WId m_winid;
+};
+
+class QEglPaintDevice : public QGLPaintDevice
+{
+public:
+    QEglPaintDevice(QEglScreen *screen, QEglWindow *window);
+
+    QSize size() const { return m_screen->geometry().size(); }
+    QGLContext* context() const { return m_window->context();}
+
+    QPaintEngine *paintEngine() const { return qt_qgl_paint_engine(); }
+
+    void  beginPaint(){
+        QGLPaintDevice::beginPaint();
+    }
+private:
+    QEglScreen *m_screen;
+    QEglWindow * m_window;
+};
+
+
+
+
+QEglScreen::QEglScreen()
+    : m_depth(16), m_format(QImage::Format_RGB16), m_platformContext(0)
+{
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglScreen %p\n", this);
+#endif
+    QGLFormat format = QGLFormat::defaultFormat();
+    m_platformContext = new QEglContext(format);
+
+
+    m_geometry = QRect(QPoint(), m_platformContext->size());
+
+}
+
+
+
+
+QEglPaintDevice::QEglPaintDevice(QEglScreen *screen, QEglWindow *window)
+    :QGLPaintDevice(), m_screen(screen), m_window(window)
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qDebug() << "QEglPaintDevice" << this << screen << window;
+#endif
+}
+
+
+
+QEglWindow::QEglWindow(QWidget *w, QEglScreen *screen)
+    : QPlatformWindow(w), m_screen(screen), m_pd(0), m_context(0)
+{
+    static int serialNo = 0;
+    m_winid  = ++serialNo;
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglWindow %p: %p %p 0x%x\n", this, w, screen, uint(m_winid));
+#endif
+    m_pd = new QEglPaintDevice(screen, this);
+    m_context = new QGLContext( screen->m_platformContext->format(), w);
+    m_context->create();
+}
+
+
+void QEglWindow::setGeometry(const QRect &)
+{
+    // We only support full-screen windows
+    QRect rect(m_screen->availableGeometry());
+    QWindowSystemInterface::handleGeometryChange(this->widget(), rect);
+
+    QPlatformWindow::setGeometry(rect);
+}
+
+WId QEglWindow::winId() const
+{
+    return m_winid;
+}
+
+
+
+QPlatformGLContext *QEglWindow::glContext()
+{
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglWindow::glContext %p\n", m_screen->m_platformContext);
+#endif
+    Q_ASSERT(m_screen);
+     return m_screen->m_platformContext;
+}
+
+QEglIntegration::QEglIntegration()
+{
+    m_primaryScreen = new QEglScreen();
+
+    mScreens.append(m_primaryScreen);
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglIntegration\n");
+#endif
+}
+
+QPixmapData *QEglIntegration::createPixmapData(QPixmapData::PixelType type) const
+{
+#ifdef QEGL_EXTRA_DEBUG
+    fprintf(stderr, "QEglIntegration::createPixmapData %d\n", type);
+#endif
+    return new QGLPixmapData(type);
+}
+
+QPlatformWindow *QEglIntegration::createPlatformWindow(QWidget *widget, WId winId) const
+{
+    Q_UNUSED(winId);
+#ifdef QEGL_EXTRA_DEBUG
+    qDebug() << "QEglIntegration::createPlatformWindow" <<  widget;
+#endif
+    return new QEglWindow(widget, m_primaryScreen);
+}
+
+
+class QEglWindowSurface : public QWindowSurface
+{
+public:
+    QEglWindowSurface(QWidget *window, QEglScreen *screen);
+    ~QEglWindowSurface() {}
+
+    QPaintDevice *paintDevice() { return m_window->paintDevice(); }
+    void flush(QWidget *widget, const QRegion &region, const QPoint &offset);
+    void resize(const QSize &size) {}
+private:
+    QEglScreen *m_screen;
+    QEglWindow *m_window;
+};
+
+QEglWindowSurface::QEglWindowSurface(QWidget *window, QEglScreen *screen)
+    :QWindowSurface(window), m_screen(screen), m_window(0)
+{
+#ifdef QEGL_EXTRA_DEBUG
+    qDebug() << "QEglWindowSurface" << window << screen;
+#endif
+    m_window = static_cast<QEglWindow*>(window->platformWindow());
+}
+
+
+void QEglWindowSurface::flush(QWidget *widget, const QRegion &region, const QPoint &offset)
+{
+    Q_UNUSED(widget);
+    Q_UNUSED(region);
+    Q_UNUSED(offset);
+#ifdef QEGL_EXTRA_DEBUG
+    qDebug() << "QEglWindowSurface::flush";
+#endif
+    m_screen->m_platformContext->swapBuffers();
+}
+
+QWindowSurface *QEglIntegration::createWindowSurface(QWidget *widget, WId winId) const
+{
+    Q_UNUSED(winId);
+
+#ifdef QEGL_EXTRA_DEBUG
+    qDebug() << "QEglIntegration::createWindowSurface" << widget;
+#endif
+    return new QEglWindowSurface(widget, m_primaryScreen);
+}
diff --git a/src/plugins/platforms/eglfs/eglintegration.h b/src/plugins/platforms/eglfs/eglintegration.h
new file mode 100644
index 0000000..7b9b8cf
--- /dev/null
+++ b/src/plugins/platforms/eglfs/eglintegration.h
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef EGLINTEGRATION_H
+#define EGLINTEGRATION_H
+
+#include <QtGui/QPlatformIntegration>
+#include <QtGui/QPlatformScreen>
+
+QT_BEGIN_NAMESPACE
+
+class QEglScreen;
+class QEglIntegration : public QPlatformIntegration
+{
+public:
+    QEglIntegration();
+
+    QPixmapData *createPixmapData(QPixmapData::PixelType type) const;
+    QPlatformWindow *createPlatformWindow(QWidget *widget, WId winId) const;
+    QWindowSurface *createWindowSurface(QWidget *widget, WId winId) const;
+
+    QList<QPlatformScreen *> screens() const { return mScreens; }
+
+private:
+    QList<QPlatformScreen *> mScreens;
+    QEglScreen *m_primaryScreen;
+};
+
+QT_END_NAMESPACE
+
+
+#endif
diff --git a/src/plugins/platforms/eglfs/eglintegration.pro b/src/plugins/platforms/eglfs/eglintegration.pro
new file mode 100644
index 0000000..7cd2f05
--- /dev/null
+++ b/src/plugins/platforms/eglfs/eglintegration.pro
@@ -0,0 +1,14 @@
+TARGET = eglintegration
+TEMPLATE = lib
+CONFIG += plugin
+
+QT += opengl
+
+SOURCES =   main.cpp \
+            eglintegration.cpp \
+            ../eglconvenience/qeglconvenience.cpp
+HEADERS =   eglintegration.h \
+            ../eglconvenience/qeglconvenience.h
+
+target.path += $$[QT_INSTALL_PLUGINS]/platforms
+INSTALLS += target
diff --git a/src/plugins/platforms/eglfs/main.cpp b/src/plugins/platforms/eglfs/main.cpp
new file mode 100644
index 0000000..adaea78
--- /dev/null
+++ b/src/plugins/platforms/eglfs/main.cpp
@@ -0,0 +1,72 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/QPlatformIntegrationPlugin>
+#include "eglintegration.h"
+
+QT_BEGIN_NAMESPACE
+
+class QEglIntegrationPlugin : public QPlatformIntegrationPlugin
+{
+public:
+    QStringList keys() const;
+    QPlatformIntegration *create(const QString&, const QStringList&);
+};
+
+QStringList QEglIntegrationPlugin::keys() const
+{
+    QStringList list;
+    list << "EglFS";
+    return list;
+}
+
+QPlatformIntegration* QEglIntegrationPlugin::create(const QString& system, const QStringList& paramList)
+{
+    Q_UNUSED(paramList);
+    if (system.toLower() == "eglfs")
+        return new QEglIntegration;
+
+    return 0;
+}
+
+Q_EXPORT_PLUGIN2(eglintegration, QEglIntegrationPlugin)
+
+QT_END_NAMESPACE