first commit

1 files changed, 53 insertions, 0 deletions

diff --git a/source/nds/displaymodes.cpp b/source/nds/displaymodes.cpp
new file mode 100644
index 0000000..4b52753
--- /dev/null
+++ b/source/nds/displaymodes.cpp
@@ -0,0 +1,53 @@
+//entry.c
+#include <stdio.h>
+
+#include "ds2_types.h"
+#include "ds2_cpu.h"
+#include "ds2_timer.h"
+#include "ds2io.h"
+#include "fs_api.h"
+
+
+#include "gfx.h"
+
+
+u32 y_scale_ = (224<<8) / 192;
+
+
+static inline void Put_Pixel (unsigned char* screen, int y, int y_scale)
+{
+
+	memcpy(&screen[((y<<1) << 8)], &GFX.Screen [(((y*y_scale)>>8)<<1) <<8], 256*2);
+}
+
+
+bool Draw_Frame_Flip(bool flip)
+{
+
+	int y = 0;
+		
+	do
+	{
+			int tempy = y << 4;
+			
+
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_+1);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;			
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;				
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);tempy++;
+			Put_Pixel ((unsigned char*)up_screen_addr, tempy, y_scale_);
+	}
+	while(++y < 12);		
+	return 1;
+}