src/external/3rd/application/UiBuilder/UIDirectDrawOffscreenCanvas.cpp

   1 #include "FirstUiBuilder.h"
   2 #include "UIDirectDrawOffscreenCanvas.h"
   3
   4 UIDirectDrawOffscreenCanvas::UIDirectDrawOffscreenCanvas( const UISize &Size ) : UIDirectDrawCanvas( Size )
   5 {
   6 }
   7
   8 UIDirectDrawOffscreenCanvas::~UIDirectDrawOffscreenCanvas()
   9 {
  10 }
  11
  12 bool UIDirectDrawOffscreenCanvas::IsA( const UITypeID Type ) const
  13 {
  14         return (Type == TUIDirectDrawOffscreenCanvas) || UIDirectDrawCanvas::IsA( Type );
  15 }
  16
  17 bool UIDirectDrawOffscreenCanvas::Generate( void ) const
  18 {
  19         if( !mSurface )
  20         {
  21                 LPDIRECTDRAWSURFACE7 CreatedSurface;
  22                 DDSURFACEDESC2                   ddsd = { sizeof( ddsd ) };
  23                 HRESULT                                                  hr;
  24
  25                 ddsd.dwFlags                             = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
  26                 ddsd.dwWidth                             = mSize.x;
  27                 ddsd.dwHeight                            = mSize.y;
  28
  29                 ddsd.ddsCaps.dwCaps      = DDSCAPS_OFFSCREENPLAIN;
  30                 ddsd.ddsCaps.dwCaps2 = 0;
  31
  32                 hr = gDirectDraw->CreateSurface( &ddsd, &CreatedSurface, 0 );
  33
  34                 if( FAILED( hr ) )
  35                         return false;
  36
  37                 const_cast<UIDirectDrawOffscreenCanvas *>( this )->SetSurface( CreatedSurface );
  38         }
  39         else if( mSurface->IsLost() )
  40         {
  41                 if( FAILED( mSurface->Restore() ) )
  42                         return false;
  43         }
  44
  45         return UICanvas::Generate();
  46 }