diff options
| -rw-r--r-- | video/cocoa_v.m | 34 |
1 files changed, 31 insertions, 3 deletions
diff --git a/video/cocoa_v.m b/video/cocoa_v.m index 0daffd8f1..654b5a9fb 100644 --- a/video/cocoa_v.m +++ b/video/cocoa_v.m @@ -1470,15 +1470,43 @@ static void QZ_DrawScreen(void) uint width; uint pitch; uint y; - - QZ_WaitForVerticalBlank(); + uint num_dirty_rects; + uint length_drawn; + uint left; + uint i; src = _cocoa_video_data.pixels; dst = (uint8*)_cocoa_video_data.realpixels; height = _cocoa_video_data.height; width = _cocoa_video_data.width; pitch = _cocoa_video_data.pitch; - for (y = 0; y < height; y++) memcpy(dst + y * pitch, src + y * width, width); + num_dirty_rects = _cocoa_video_data.num_dirty_rects; + + /* Check if we need to do anything */ + if (_cocoa_video_data.num_dirty_rects == 0 ) { + return; + } + + if (num_dirty_rects >= MAX_DIRTY_RECTS) { + num_dirty_rects = 1; + _cocoa_video_data.dirty_rects[0].left = 0; + _cocoa_video_data.dirty_rects[0].top = 0; + _cocoa_video_data.dirty_rects[0].right = _cocoa_video_data.width; + _cocoa_video_data.dirty_rects[0].bottom = _cocoa_video_data.height; + } + + QZ_WaitForVerticalBlank(); + /* Build the region of dirty rectangles */ + for (i = 0; i < num_dirty_rects; i++) { + + y = _cocoa_video_data.dirty_rects[i].top; + left = _cocoa_video_data.dirty_rects[i].left; + length_drawn = _cocoa_video_data.dirty_rects[i].right - left + 1; + height = _cocoa_video_data.dirty_rects[i].bottom; + for (; y <= height; y++) memcpy(dst + y * pitch + left, src + y * width +left, length_drawn); + } + + _cocoa_video_data.num_dirty_rects = 0; } static int QZ_ListFullscreenModes(OTTDPoint* mode_list, int max_modes) |