diff options
Diffstat (limited to 'sword2/driver/rdwin.cpp')
| -rw-r--r-- | sword2/driver/rdwin.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sword2/driver/rdwin.cpp b/sword2/driver/rdwin.cpp index 025b99b164..e6bdc9cccd 100644 --- a/sword2/driver/rdwin.cpp +++ b/sword2/driver/rdwin.cpp @@ -76,6 +76,21 @@ void Graphics::setNeedFullRedraw(void) { } /** + * Mark an area of the screen as dirty, first generation. + */ + +void Graphics::markAsDirty(int16 x0, int16 y0, int16 x1, int16 y1) { + int16 gridX0 = x0 / CELLWIDE; + int16 gridY0 = y0 / CELLDEEP; + int16 gridX1 = x1 / CELLWIDE; + int16 gridY1 = y1 / CELLDEEP; + + for (int16 i = gridY0; i <= gridY1; i++) + for (int16 j = gridX0; j <= gridX1; j++) + _dirtyGrid[i * _gridWide + j] = 2; +} + +/** * This function has two purposes: It redraws the scene, and it handles input * events, palette fading, etc. It should be called at a high rate (> 20 per * second), but the scene is usually only redrawn about 12 times per second, |