void OSScreenManager::blitFrom(SurfaceNum surfaceNum, const Rect *rect, CVideoSurface *src, int v) {
// Get the dest surface
CVideoSurface *destSurface = _frontRenderSurface;
if (surfaceNum < -1)
return;
if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size())
destSurface = _backSurfaces[surfaceNum]._surface;
if (!destSurface->hasSurface())
return;
if (!rect->isEmpty())
destSurface->blitFrom(Point(rect->left, rect->top), src, rect);
}
void OSScreenManager::blitFrom(SurfaceNum surfaceNum, CVideoSurface *src,
const Point *destPos, const Rect *srcRect) {
// Get the dest surface
CVideoSurface *destSurface = _frontRenderSurface;
if (surfaceNum < -1)
return;
if (surfaceNum >= 0 && surfaceNum < (int)_backSurfaces.size())
destSurface = _backSurfaces[surfaceNum]._surface;
if (!destSurface->hasSurface())
return;
Point destPoint = destPos ? *destPos : Point(0, 0);
Rect srcBounds = srcRect ? *srcRect : Rect(0, 0, src->getWidth(), src->getHeight());
Rect *bounds = &srcBounds;
Rect rect2;
Rect surfaceBounds = (surfaceNum == SURFACE_PRIMARY) ? _frontSurfaceBounds :
_backSurfaces[surfaceNum]._bounds;
if (!surfaceBounds.isEmpty()) {
// Perform clipping to the bounds of the back surface
rect2 = srcBounds;
rect2.translate(-srcBounds.left, -srcBounds.top);
rect2.translate(destPoint.x, destPoint.y);
rect2.constrain(surfaceBounds);
rect2.translate(-destPoint.x, -destPoint.y);
rect2.translate(srcBounds.left, srcBounds.top);
if (rect2.isEmpty())
return;
destPoint.x += rect2.left - srcBounds.left;
destPoint.y += rect2.top - srcBounds.top;
bounds = &rect2;
}
if (!bounds->isEmpty())
destSurface->blitFrom(destPoint, src, bounds);
}