gui: experimental Z order for root widgets
[enigma2.git] / lib / gui / ewidgetdesktop.cpp
index 96f7463..223b5c8 100644 (file)
@@ -1,22 +1,57 @@
 #include <lib/gui/ewidgetdesktop.h>
 #include <lib/gui/ewidget.h>
 #include <lib/base/ebase.h>
 #include <lib/gui/ewidgetdesktop.h>
 #include <lib/gui/ewidget.h>
 #include <lib/base/ebase.h>
+#include <lib/gdi/grc.h>
 
 
-void eWidgetDesktop::addRootWidget(eWidget *root, int top)
+extern void dumpRegion(const gRegion &region);
+
+void eWidgetDesktop::addRootWidget(eWidget *root)
 {
        assert(!root->m_desktop);
 {
        assert(!root->m_desktop);
-       if (!top)
-               m_root.push_back(root);
-       else
-               m_root.push_front(root);
+       
+       int invert_sense = 0;
+               /* buffered mode paints back-to-front, while immediate mode is front-to-back. */
+       if (m_comp_mode == cmBuffered)
+               invert_sense = 1;
+       
+       ePtrList<eWidget>::iterator insert_position = m_root.begin();
+       
+       for (;;)
+       {
+               if ((insert_position == m_root.end()) || (invert_sense ^ (insert_position->m_z_position > root->m_z_position)))
+               {
+                       m_root.insert(insert_position, root);
+                       break;
+               }
+               ++insert_position;
+       }
+       
        root->m_desktop = this;
        root->m_desktop = this;
+
+               /* the creation will be postponed. */
+       root->m_comp_buffer = 0;
 }
 
 void eWidgetDesktop::removeRootWidget(eWidget *root)
 {
 }
 
 void eWidgetDesktop::removeRootWidget(eWidget *root)
 {
+       if (m_comp_mode == cmBuffered)
+               removeBufferForWidget(root);
+
        m_root.remove(root);
 }
 
        m_root.remove(root);
 }
 
+int eWidgetDesktop::movedWidget(eWidget *root)
+{
+       if ((m_comp_mode == cmBuffered) && (root->m_comp_buffer))
+       {
+               root->m_comp_buffer->m_position = root->position();
+//             redrawComposition(0);
+               return 0;
+       }
+       
+       return -1;
+}
+
 void eWidgetDesktop::calcWidgetClipRegion(eWidget *widget, gRegion &parent_visible)
 {
                /* start with our clip region, clipped with the parent's */
 void eWidgetDesktop::calcWidgetClipRegion(eWidget *widget, gRegion &parent_visible)
 {
                /* start with our clip region, clipped with the parent's */
@@ -25,9 +60,10 @@ void eWidgetDesktop::calcWidgetClipRegion(eWidget *widget, gRegion &parent_visib
                widget->m_visible_region = widget->m_clip_region;
                widget->m_visible_region.moveBy(widget->position());
                widget->m_visible_region &= parent_visible; // in parent space!
                widget->m_visible_region = widget->m_clip_region;
                widget->m_visible_region.moveBy(widget->position());
                widget->m_visible_region &= parent_visible; // in parent space!
-                       /* TODO: check transparency here! */
-                       /* remove everything this widget will contain from parent's visible list */
-               parent_visible -= widget->m_visible_region; // will remove child regions too!
+
+               if (!widget->isTransparent())
+                               /* remove everything this widget will contain from parent's visible list, unless widget is transparent. */
+                       parent_visible -= widget->m_visible_region; // will remove child regions too!
 
                        /* now prepare for recursing to childs */
                widget->m_visible_region.moveBy(-widget->position());            // now in local space
 
                        /* now prepare for recursing to childs */
                widget->m_visible_region.moveBy(-widget->position());            // now in local space
@@ -36,60 +72,203 @@ void eWidgetDesktop::calcWidgetClipRegion(eWidget *widget, gRegion &parent_visib
 
        widget->m_visible_with_childs = widget->m_visible_region;
        
 
        widget->m_visible_with_childs = widget->m_visible_region;
        
-       for (ePtrList<eWidget>::iterator i(widget->m_childs.begin()); i != widget->m_childs.end(); ++i)
-               calcWidgetClipRegion(*i, widget->m_visible_region);
+                       /* add childs in reverse (Z) order - we're going from front-to-bottom here. */
+       ePtrList<eWidget>::iterator i(widget->m_childs.end());
+       
+       for (;;)
+       {
+               if (i != widget->m_childs.end())
+               {
+                       if (i->m_vis & eWidget::wVisShow)
+                               calcWidgetClipRegion(*i, widget->m_visible_region);
+                       else
+                               clearVisibility(*i);
+               }
+               if (i == widget->m_childs.begin())
+                       break;
+               --i;
+       }
 }
 
 }
 
-void eWidgetDesktop::recalcClipRegions()
+void eWidgetDesktop::recalcClipRegions(eWidget *root)
 {
 {
-       m_background_region = gRegion(eRect(ePoint(0, 0), m_screen_size));
+       if (m_comp_mode == cmImmediate)
+       {
+               gRegion background_before = m_screen.m_background_region;
+               
+               m_screen.m_background_region = gRegion(eRect(ePoint(0, 0), m_screen.m_screen_size));
        
        
-       for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
-               calcWidgetClipRegion(*i, m_background_region);
+               for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+               {
+                       if (!(i->m_vis & eWidget::wVisShow))
+                       {
+                               clearVisibility(i);
+                               continue;
+                       }
+                       
+                       gRegion visible_before = i->m_visible_with_childs;
+
+                       calcWidgetClipRegion(*i, m_screen.m_background_region);
+                       
+                       gRegion redraw = (i->m_visible_with_childs - visible_before) | (visible_before - i->m_visible_with_childs);
+
+                       redraw.moveBy(i->position());
+                       
+                       invalidate(redraw);
+               }
+               
+               gRegion redraw = (background_before - m_screen.m_background_region) | (m_screen.m_background_region - background_before);
+               invalidate(redraw);
+       } else if (m_comp_mode == cmBuffered)
+       {
+               if (!root->m_vis & eWidget::wVisShow)
+               {
+                       clearVisibility(root);
+                       removeBufferForWidget(root);
+                       return;
+               }
+               if ((!root->m_comp_buffer) || (root->size() != root->m_comp_buffer->m_screen_size))
+                       createBufferForWidget(root);
+
+               eWidgetDesktopCompBuffer *comp = root->m_comp_buffer;
+
+               gRegion visible_before = root->m_visible_with_childs;
+                
+               comp->m_background_region = gRegion(eRect(comp->m_position, comp->m_screen_size));
+               
+               gRegion visible_new = root->m_visible_with_childs - visible_before;
+               gRegion visible_lost = visible_before - root->m_visible_with_childs;
+               visible_new.moveBy(root->position());
+               visible_lost.moveBy(root->position());
+               
+                       /* this sucks, obviously. */
+               invalidate(visible_new);
+               invalidate(visible_lost);
+               
+               calcWidgetClipRegion(root, comp->m_background_region);
+       }
 }
 
 void eWidgetDesktop::invalidate(const gRegion &region)
 {
 }
 
 void eWidgetDesktop::invalidate(const gRegion &region)
 {
-       if (m_timer && m_dirty_region.empty())
+       if (region.empty())
+               return;
+       
+       if (m_timer && !m_require_redraw)
                m_timer->start(0, 1); // start singleshot redraw timer
                m_timer->start(0, 1); // start singleshot redraw timer
-       m_dirty_region |= region;
+       
+       m_require_redraw = 1;
+       
+       if (m_comp_mode == cmImmediate)
+               m_screen.m_dirty_region |= region;
+       else
+               for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+               {
+                       if (!(i->m_vis & eWidget::wVisShow))
+                               continue;
+                       
+                       eWidgetDesktopCompBuffer *comp = i->m_comp_buffer;
+                       
+                       gRegion mregion = region;
+                       comp->m_dirty_region |= mregion;
+               }
 }
 
 }
 
-void eWidgetDesktop::setBackgroundColor(gColor col)
+void eWidgetDesktop::setBackgroundColor(eWidgetDesktopCompBuffer *comp, gRGB col)
 {
 {
-       m_background_color = col;
+       comp->m_background_color = col;
        
                /* if there's something visible from the background, redraw it with the new color. */
        
                /* if there's something visible from the background, redraw it with the new color. */
-       if (m_dc && m_background_region.valid() && !m_background_region.empty())
+       if (comp->m_dc && comp->m_background_region.valid() && !comp->m_background_region.empty())
        {
                        /* todo: split out "setBackgroundColor / clear"... maybe? */
        {
                        /* todo: split out "setBackgroundColor / clear"... maybe? */
-               gPainter painter(m_dc);
-               painter.resetClip(m_background_region);
-               painter.setBackgroundColor(m_background_color);
+               gPainter painter(comp->m_dc);
+               painter.resetClip(comp->m_background_region);
+               painter.setBackgroundColor(comp->m_background_color);
                painter.clear();
        }
 }
 
                painter.clear();
        }
 }
 
+void eWidgetDesktop::setBackgroundColor(gRGB col)
+{
+       setBackgroundColor(&m_screen, col);
+
+       if (m_comp_mode == cmBuffered)
+               for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+                       setBackgroundColor(i->m_comp_buffer, col);
+}
+
+void eWidgetDesktop::setPalette(gPixmap &pm)
+{
+//     if (m_comp_mode == cmImmediate)
+       {
+               ASSERT(m_screen.m_dc);
+               gPainter painter(m_screen.m_dc);
+               painter.setPalette(&pm);
+       }
+       
+       if (m_comp_mode == cmBuffered)
+       {
+               for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+               {
+                       ASSERT(i->m_comp_buffer->m_dc);
+                       gPainter painter(i->m_comp_buffer->m_dc);
+                       painter.setPalette(&pm);
+               }
+       }
+}
+
+void eWidgetDesktop::paintBackground(eWidgetDesktopCompBuffer *comp)
+{
+       comp->m_dirty_region &= comp->m_background_region;
+       
+       gPainter painter(comp->m_dc);
+       
+       painter.resetClip(comp->m_dirty_region);
+       painter.setBackgroundColor(comp->m_background_color);
+       painter.clear();
+       painter.flush();
+       
+       comp->m_dirty_region = gRegion();
+}
+
 void eWidgetDesktop::paint()
 {
 void eWidgetDesktop::paint()
 {
-       gPainter painter(m_dc);
+       m_require_redraw = 0;
+       
                /* walk all root windows. */
        for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
                /* walk all root windows. */
        for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
-               i->doPaint(painter, m_dirty_region);
-       m_dirty_region &= m_background_region;
-       
-       painter.resetClip(m_dirty_region);
-       painter.setBackgroundColor(m_background_color);
-       painter.clear();
+       {
+               eWidgetDesktopCompBuffer *comp = (m_comp_mode == cmImmediate) ? &m_screen : i->m_comp_buffer;
+               
+               if (!(i->m_vis & eWidget::wVisShow))
+                       continue;
+               
+               {
+                       gPainter painter(comp->m_dc);
+                       painter.moveOffset(-comp->m_position);
+                       i->doPaint(painter, comp->m_dirty_region);
+                       painter.resetOffset();
+               }
+
+               if (m_comp_mode != cmImmediate)
+                       paintBackground(comp);
+       }
        
        
-       painter.flush();
+       if (m_comp_mode == cmImmediate)
+               paintBackground(&m_screen);
        
        
-       m_dirty_region = gRegion();
+       if (m_comp_mode == cmBuffered)
+       {
+//             redrawComposition(0);
+       }
 }
 
 void eWidgetDesktop::setDC(gDC *dc)
 {
 }
 
 void eWidgetDesktop::setDC(gDC *dc)
 {
-       m_dc = dc;
+       m_screen.m_dc = dc;
+       if (m_comp_mode == cmBuffered)
+               redrawComposition(1);
 }
 
 void eWidgetDesktop::setRedrawTask(eMainloop &ml)
 }
 
 void eWidgetDesktop::setRedrawTask(eMainloop &ml)
@@ -104,15 +283,146 @@ void eWidgetDesktop::setRedrawTask(eMainloop &ml)
        m_timer = new eTimer(m_mainloop);
        CONNECT(m_timer->timeout, eWidgetDesktop::paint);
        
        m_timer = new eTimer(m_mainloop);
        CONNECT(m_timer->timeout, eWidgetDesktop::paint);
        
-       if (!m_dirty_region.empty())
+       if (m_require_redraw)
                m_timer->start(0, 1);
 }
 
                m_timer->start(0, 1);
 }
 
-eWidgetDesktop::eWidgetDesktop(eSize size): m_screen_size(size), m_mainloop(0), m_timer(0)
+void eWidgetDesktop::makeCompatiblePixmap(gPixmap &pm)
 {
 {
+       if (m_comp_mode != cmImmediate)
+               return;
+       
+//     eDebug("widgetDesktop: make compatible pixmap of %p", &pm);
+       if (!m_screen.m_dc)
+       {
+               eWarning("eWidgetDesktop: no DC to make pixmap compatible with!");
+               return;
+       }
+
+       ePtr<gDC> pixmap_dc = new gDC(&pm);
+       gPainter pixmap_painter(pixmap_dc);
+       
+       ePtr<gPixmap> target_pixmap;
+       m_screen.m_dc->getPixmap(target_pixmap);
+       
+       assert(target_pixmap);
+       
+       pixmap_painter.mergePalette(target_pixmap);
+}
+
+void eWidgetDesktop::setCompositionMode(int mode)
+{
+       m_comp_mode = mode;
+       
+       if (mode == cmBuffered)
+               for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+                       createBufferForWidget(*i);
+       else
+               for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+                       removeBufferForWidget(*i);
+}
+
+eWidgetDesktop::eWidgetDesktop(eSize size): m_mainloop(0), m_timer(0)
+{
+       m_screen.m_dirty_region = gRegion(eRect(ePoint(0, 0), size));
+       m_screen.m_screen_size = size;
+       m_require_redraw = 0;
+
+       CONNECT(gRC::getInstance()->notify, eWidgetDesktop::notify);
+       setCompositionMode(cmImmediate);
 }
 
 eWidgetDesktop::~eWidgetDesktop()
 {
 }
 
 eWidgetDesktop::~eWidgetDesktop()
 {
+               /* tell registered root windows that they no longer have a desktop. */
+       for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); )
+       {
+               i->m_desktop = 0;
+               i = m_root.erase(i);
+       }
+               /* destroy all buffers */
+       setCompositionMode(-1);
 }
 
 }
 
+void eWidgetDesktop::createBufferForWidget(eWidget *widget)
+{
+       removeBufferForWidget(widget);
+       
+       eWidgetDesktopCompBuffer *comp = widget->m_comp_buffer = new eWidgetDesktopCompBuffer;
+       
+       eDebug("create buffer for widget, %d x %d\n", widget->size().width(), widget->size().height());
+       
+       eRect bbox = eRect(widget->position(), widget->size());
+       comp->m_position = bbox.topLeft();
+       comp->m_dirty_region = gRegion(eRect(ePoint(0, 0), bbox.size()));
+       comp->m_screen_size = bbox.size();
+               /* TODO: configurable bit depth. */
+       
+               /* clone palette. FIXME. */
+       ePtr<gPixmap> pm = new gPixmap(comp->m_screen_size, 32, 1), pm_screen;
+       pm->surface->clut.data = new gRGB[256];
+       pm->surface->clut.colors = 256;
+       pm->surface->clut.start = 0;
+       
+       
+       m_screen.m_dc->getPixmap(pm_screen);
+       
+       memcpy(pm->surface->clut.data, pm_screen->surface->clut.data, 256 * sizeof(gRGB));
+
+       comp->m_dc = new gDC(pm);
+}
+
+void eWidgetDesktop::removeBufferForWidget(eWidget *widget)
+{
+       if (widget->m_comp_buffer)
+       {
+               delete widget->m_comp_buffer;
+               widget->m_comp_buffer = 0;
+       }
+}
+
+void eWidgetDesktop::redrawComposition(int notified)
+{
+       if (m_comp_mode != cmBuffered)
+               return;
+       
+       assert(m_screen.m_dc);
+       
+       gPainter p(m_screen.m_dc);
+       p.resetClip(eRect(ePoint(0, 0), m_screen.m_screen_size));
+       p.setBackgroundColor(m_screen.m_background_color);
+       p.clear();
+       
+       for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+       {
+               if (!i->isVisible())
+                       continue;
+               ePtr<gPixmap> pm;
+               ASSERT(i->m_comp_buffer);
+               i->m_comp_buffer->m_dc->getPixmap(pm);
+               p.blit(pm, i->m_comp_buffer->m_position, eRect(), gPixmap::blitAlphaBlend);
+       }
+
+               // flip activates on next vsync.        
+       p.flip();
+       p.waitVSync();
+
+       if (notified)
+               p.notify();
+
+       for (ePtrList<eWidget>::iterator i(m_root.begin()); i != m_root.end(); ++i)
+               if (i->m_animation.m_active)
+                       i->m_animation.tick(1);
+}
+
+void eWidgetDesktop::notify()
+{
+       redrawComposition(1);
+}
+
+void eWidgetDesktop::clearVisibility(eWidget *widget)
+{
+       widget->m_visible_with_childs = gRegion();
+       for (ePtrList<eWidget>::iterator i(widget->m_childs.begin()); i != widget->m_childs.end(); ++i)
+               clearVisibility(*i);
+}