Usermode/Applications/axwin4_src/Server/compositor.cpp

   1 /*
   2  * Acess2 GUI v4
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * compositor.cpp
   6  * - Window compositor
   7  */
   8 #include <video.hpp>
   9 #include <CCompositor.hpp>
  10 #include <cassert>
  11
  12 namespace AxWin {
  13
  14 CCompositor::CCompositor(CVideo& video):
  15         m_video(video)
  16 {
  17         //
  18 }
  19
  20 CWindow* CCompositor::CreateWindow(CClient& client, const ::std::string& name)
  21 {
  22         return new CWindow(*this, client, name);
  23 }
  24
  25 bool CCompositor::GetScreenDims(unsigned int ScreenID, unsigned int* W, unsigned int* H)
  26 {
  27         assert(W && H);
  28         if( ScreenID != 0 )
  29         {
  30                 *W = 0;
  31                 *H = 0;
  32                 return false;
  33         }
  34         else
  35         {
  36                 m_video.GetDims(*W, *H);
  37                 return true;
  38         }
  39 }
  40
  41 void CCompositor::Redraw()
  42 {
  43         // Redraw the screen and clear damage rects
  44         if( m_damageRects.empty() )
  45                 return ;
  46
  47         // Build up foreground grid (Rects and windows)
  48         // - This should already be built (mutated on window move/resize/reorder)
  49
  50         // For all windows, check for intersection with damage rects
  51         for( auto rect : m_damageRects )
  52         {
  53                 // window list should be sorted by draw order (lowest first)
  54                 for( auto window : m_windows )
  55                 {
  56                         if( rect.HasIntersection( window->m_surface.m_rect ) )
  57                         {
  58                                 // TODO: just reblit
  59                                 CRect   rel_rect = window->m_surface.m_rect.RelativeIntersection(rect);
  60                                 BlitFromSurface( window->m_surface, rel_rect );
  61                                 //window->Repaint( rel_rect );
  62                         }
  63                 }
  64
  65                 // TODO: Blit from windows to a local surface, then blit from there to screen here
  66         }
  67
  68         m_damageRects.clear();
  69         m_video.Flush();
  70 }
  71
  72 void CCompositor::DamageArea(const CRect& area)
  73 {
  74         m_damageRects.push_back( area );
  75         // 1. Locate intersection with any existing damaged areas
  76         // 2. Append after removing intersections
  77 }
  78
  79 void CCompositor::BlitFromSurface(const CSurface& dest, const CRect& src_rect)
  80 {
  81         for( unsigned int i = 0; i < src_rect.m_h; i ++ )
  82         {
  83                 m_video.BlitLine(
  84                         dest.GetScanline(src_rect.m_y, src_rect.m_y),
  85                         dest.m_rect.m_y + src_rect.m_y + i,
  86                         dest.m_rect.m_x + src_rect.m_x,
  87                         src_rect.m_w
  88                         );
  89         }
  90 }
  91
  92 }       // namespace AxWin
  93