Make the UI renderer more efficient

1 files changed, 4 insertions, 4 deletions

diff --git a/c2.cpp b/c2.cpp
index 3c862a6..58f3831 100644
--- a/c2.cpp
+++ b/c2.cpp
@@ -17,7 +17,7 @@ extern "C" {
 
 #define video_arena_size (1024 * 1024 * 16)
 #define asset_arena_size (1024 * 1024 * 4)
-#define ui_arena_size    (1024 * 1024 * 64)
+#define ui_arena_size    (1024 * 1024)
 #define scene_arena_size (1024)
 #define per_frame_memory_size (1024 * 1024)
 
@@ -879,13 +879,13 @@ struct C2 : public App {
 		ctx.debug_pop();
 
 		ctx.debug_push("ui");
-		ui->render(&frame_arena);
 		{
 			int s = ui->ren.bound.w * ui->ren.bound.h * 4;
 			void* pixels = dev->map_buffer(ui_buffer, 0, s);
-			memcpy(pixels, ui->ren.pixels, s);
+			bool dirty = ui->render(&frame_arena, pixels);
 			dev->unmap_buffer(ui_buffer);
-			ctx.copy(ui_texture, ui_buffer);
+			if (dirty)
+				ctx.copy(ui_texture, ui_buffer);
 
 			pb.begin_rp();
 			pb.rp_target(dev->get_backbuffer(), Clear_Mode::restore);