diff options
Diffstat (limited to 'engines/titanic/screen_manager.cpp')
| -rw-r--r-- | engines/titanic/screen_manager.cpp | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/engines/titanic/screen_manager.cpp b/engines/titanic/screen_manager.cpp index 942bb4179f..4f9fbc2215 100644 --- a/engines/titanic/screen_manager.cpp +++ b/engines/titanic/screen_manager.cpp @@ -123,7 +123,45 @@ CVideoSurface *OSScreenManager::getSurface(int surfaceNum) const { void OSScreenManager::proc9() {} void OSScreenManager::proc10() {} -void OSScreenManager::proc11() {} + +void OSScreenManager::blitFrom(int 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; + + if (surfaceNum >= 0 && !_backSurfaces[surfaceNum]._bounds.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.combine2(_backSurfaces[surfaceNum]._bounds); + + 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); +} + void OSScreenManager::proc12() {} void OSScreenManager::proc13() {} void OSScreenManager::proc14() {} |