From a1076164cb49af724508559597694f900f55e09a Mon Sep 17 00:00:00 2001
From: anod <182859762@qq.com>
Date: Mon, 26 Sep 2022 14:09:32 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=BAatp=5Fshow=E5=A2=9E=E5=8A=A0=E4=BA=86?=
 =?UTF-8?q?=E4=B8=8A=E4=B8=8B=E6=BB=9A=E5=8A=A8=E7=9A=84=E5=A4=84=E7=90=86?=
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---
 source/arm11/atp.c           | 30 +++++++++++++++++++++++-------
 source/arm11/open_agb_firm.c |  2 +-
 2 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/source/arm11/atp.c b/source/arm11/atp.c
index 851d55a..1fb2c6b 100644
--- a/source/arm11/atp.c
+++ b/source/arm11/atp.c
@@ -91,7 +91,7 @@ static void paint_one_line( atp_lineinfo_t provider, acf_callerdata_t data, int
 static void container_paint( atp_lineinfo_t provider, atp_callerdata_t data, atp_counter_t nlines, int top )
 {
     int end = top + CONTAINER_MAX_LINES;
-    if( end > nlines ) end = nlines;
+    if( end > (int)nlines ) end = nlines;
     for( int n = top; n < end; ++n ){
         paint_one_line( provider, data, n, n-top );
     }
@@ -100,16 +100,32 @@ static void container_paint( atp_lineinfo_t provider, atp_callerdata_t data, atp
 atp_error_t atp_show( atp_counter_t cnt, atp_lineinfo_t provider, atp_callerdata_t data )
 {
     int idx_top = 0;
+    screen_clean();
+    container_paint( provider, data, cnt, idx_top );
  
     while( 1 ){
-        screen_clean();
-        container_paint( provider, data, cnt, idx_top );
-
+        int top = idx_top;
         u32 kDown = waitKey();
 
-        if( kDown == 0 ) return ATP_POWER_OFF;
-        if( kDown == KEY_B || kDown == KEY_A ) 
-            return ATP_SUCCESS;
+        if( kDown == KEY_B || kDown == KEY_A ) return ATP_SUCCESS;
+        else if( cnt > CONTAINER_MAX_LINES ){       // may scroll
+            if( kDown == KEY_UP || kDown == KEY_DUP ){
+                top = idx_top - 1;
+            }
+            else if( kDown == KEY_DOWN || kDown == KEY_DDOWN ){
+                top = idx_top + 1;
+            }
+
+            if( top+CONTAINER_MAX_LINES >= cnt ) top = cnt - 1 - CONTAINER_MAX_LINES;
+            else if( top < 0 ) top = 0;
+        }
+        else if( kDown == 0 ) return ATP_POWER_OFF;
+
+        if( top != idx_top ){
+            idx_top = top;
+            screen_clean();
+            container_paint(provider, data, cnt, idx_top);
+        }
     }
 }
 
diff --git a/source/arm11/open_agb_firm.c b/source/arm11/open_agb_firm.c
index b9a25b2..687ee7b 100644
--- a/source/arm11/open_agb_firm.c
+++ b/source/arm11/open_agb_firm.c
@@ -526,7 +526,7 @@ static void gbaGfxHandler(void *args)
 		}
 		GX_processCommandList(listSize, list);
 		GFX_waitForP3D();
-		// 地址0x18180000保存的是360x240大小的贴图数据
+		// 地址0x18180000保存的是360x240大小的贴图数据rgb888
 		// 地址0x18200000保存的是512x512大小的GBA的240x160贴图数据
 		GX_displayTransfer((u32*)(0x18180000 + (16 * 240 * 3)), 368u<<16 | 240u,
 		                   GFX_getFramebuffer(SCREEN_TOP) + (16 * 240 * 3), 368u<<16 | 240u, 1u<<12 | 1u<<8);