WindowServer: Only blit dirty rect of windows to back buffer.

Previously we'd blit every pixel in every window that intersected any dirty
rect to the back buffer. With this patch, we limit ourselves to blitting the
pixels inside the actual dirty rects.

There's still a lot of optimizations to make in this code.

1 files changed, 1 insertions, 1 deletions

diff --git a/SharedGraphics/Rect.cpp b/SharedGraphics/Rect.cpp
index 5b01bf2e1e..ffbf59f1ef 100644
--- a/SharedGraphics/Rect.cpp
+++ b/SharedGraphics/Rect.cpp
@@ -8,7 +8,7 @@ void Rect::intersect(const Rect& other)
     int t = max(top(), other.top());
     int b = min(bottom(), other.bottom());
 
-    if (l >= r || t >= b) {
+    if (l > r || t > b) {
         m_location = { };
         m_size = { };
         return;