examples/qwindow-compositor/qwindowcompositor.cpp

   1 #include "qwindowcompositor.h"
   2
   3 QWindowCompositor::QWindowCompositor(QOpenGLWindow *window)
   4     : WaylandCompositor(window, window->context())
   5     , m_window(window)
   6 {
   7     m_backgroundImage = QImage(QLatin1String("background.jpg"));
   8     m_renderer = new SurfaceRenderer(m_window->context(), m_window);
   9     m_backgroundTexture = m_renderer->textureFromImage(m_backgroundImage);
  10
  11     render();
  12 }
  13
  14 void QWindowCompositor::surfaceDestroyed(QObject *object)
  15 {
  16     WaylandSurface *surface = static_cast<WaylandSurface *>(object);
  17     m_surfaces.removeAll(surface);
  18     render();
  19 }
  20
  21 void QWindowCompositor::surfaceMapped(const QSize &size)
  22 {
  23     WaylandSurface *surface = qobject_cast<WaylandSurface *>(sender());
  24     QPoint pos;
  25     if (!m_surfaces.contains(surface)) {
  26         uint px = 1 + (qrand() % (m_window->width() - size.width() - 2));
  27         uint py = 1 + (qrand() % (m_window->height() - size.height() - 2));
  28         pos = QPoint(px, py);
  29         surface->setGeometry(QRect(pos, size));
  30         m_surfaces.append(surface);
  31     } else {
  32         surface->setGeometry(QRect(window()->geometry().topLeft(),size));
  33     }
  34     setInputFocus(surface);
  35     render();
  36 }
  37
  38 void QWindowCompositor::surfaceDamaged(const QRect &rect)
  39 {
  40     WaylandSurface *surface = qobject_cast<WaylandSurface *>(sender());
  41     surfaceDamaged(surface, rect);
  42 }
  43
  44 void QWindowCompositor::surfaceDamaged(WaylandSurface *surface, const QRect &rect)
  45 {
  46     Q_UNUSED(surface)
  47     Q_UNUSED(rect)
  48     render();
  49 }
  50
  51 void QWindowCompositor::surfaceCreated(WaylandSurface *surface)
  52 {
  53     connect(surface, SIGNAL(destroyed(QObject *)), this, SLOT(surfaceDestroyed(QObject *)));
  54     connect(surface, SIGNAL(mapped(const QSize &)), this, SLOT(surfaceMapped(const QSize &)));
  55     connect(surface, SIGNAL(damaged(const QRect &)), this, SLOT(surfaceDamaged(const QRect &)));
  56     render();
  57 }
  58
  59 WaylandSurface * QWindowCompositor::surfaceAt(const QPoint &point, QPoint *local)
  60 {
  61     for (int i = m_surfaces.size() - 1; i >= 0; --i) {
  62         if (m_surfaces.at(i)->geometry().contains(point)) {
  63             if (local)
  64                 *local = point - m_surfaces.at(i)->geometry().topLeft();
  65             return m_surfaces.at(i);
  66         }
  67     }
  68     return 0;
  69 }
  70
  71 void QWindowCompositor::render()
  72 {
  73     m_window->makeCurrent();
  74
  75     //Draw the background Image texture
  76     m_renderer->drawTexture(m_backgroundTexture, m_window->geometry(), 0);
  77
  78     //Iterate all surfaces in m_surfaces
  79     //If type == WaylandSurface::Texture draw textureId at geometry
  80     foreach (WaylandSurface *surface, m_surfaces) {
  81         if (surface->type() == WaylandSurface::Texture)
  82             m_renderer->drawTexture(surface->texture(), surface->geometry(), 1); //depth argument should be dynamic (focused should be top).
  83         else if (surface->type() == WaylandSurface::Shm)
  84             m_renderer->drawImage(surface->image(), surface->geometry());
  85     }
  86     frameFinished();
  87     glFinish();
  88     m_window->swapBuffers();
  89     m_window->context()->doneCurrent();
  90 }
  91