diff options
Diffstat (limited to 'engines/wintermute/base/gfx/osystem/render_ticket.h')
| -rw-r--r-- | engines/wintermute/base/gfx/osystem/render_ticket.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/engines/wintermute/base/gfx/osystem/render_ticket.h b/engines/wintermute/base/gfx/osystem/render_ticket.h index b1313e932d..875102d01c 100644 --- a/engines/wintermute/base/gfx/osystem/render_ticket.h +++ b/engines/wintermute/base/gfx/osystem/render_ticket.h @@ -36,6 +36,19 @@ namespace Wintermute { class BaseSurfaceOSystem; +/** + * A single RenderTicket. + * A render ticket is a collection of the data and draw specifications made + * for a single draw-call in the OSystem-backend for WME. The ticket additionally + * holds the order in which this call was made, so that it can be detected if + * the same call is done in the following frame. Thus allowing us to potentially + * skip drawing the same region again, unless anything has changed. Since a surface + * can have a potentially large amount of draw-calls made to it, at varying rotation, + * zoom, and crop-levels we also need to hold a copy of the necessary data. + * (Video-surfaces may even change their data). The promise that is made when a ticket + * is created is that what the state was of the surface at THAT point, is what will end + * up on screen at flip() time. + */ class RenderTicket { public: RenderTicket(BaseSurfaceOSystem *owner, const Graphics::Surface *surf, Common::Rect *srcRect, Common::Rect *dstRest, TransformStruct transform); |