ui, fix sdl flickering and status lines artifact issues

platform/common/emu.c

@@ -1117,6 +1117,7 @@ static void run_events_ui(unsigned int which)
 			while (in_menu_wait_any(NULL, 50) & (PBTN_MOK | PBTN_MBACK))
 				;
 			in_set_config_int(0, IN_CFG_BLOCKING, 0);
+			plat_status_msg_clear();
 		}
 		if (do_it) {
 			plat_status_msg_busy_first((which & PEV_STATE_LOAD) ? "LOADING STATE" : "SAVING STATE");
@@ -1361,6 +1362,7 @@ void emu_loop(void)
 	char *notice_msg = NULL;
 	char fpsbuff[24];
 	int fskip_cnt = 0;
+	int statclr_cnt = 4;
 
 	fpsbuff[0] = 0;
 
@@ -1408,12 +1410,10 @@ void emu_loop(void)
 			     > ms_to_ticks(STATUS_MSG_TIMEOUT) * 3)
 			{
 				notice_msg_time = 0;
-				plat_status_msg_clear();
-#ifndef __GP2X__
-				plat_video_flip();
-				plat_status_msg_clear(); /* Do it again in case of double buffering */
-#endif
 				notice_msg = NULL;
+				/* clear all buffers if multi buffering */
+				plat_status_msg_clear();
+				statclr_cnt = 4;
 			}
 			else {
 				int sum = noticeMsg[0] + noticeMsg[1] + noticeMsg[2];
@@ -1523,6 +1523,12 @@ void emu_loop(void)
 		if (!skip && flip_after_sync)
 			plat_video_flip();
 
+		if (!skip && statclr_cnt > 0) {
+			// clear stat msg area in case of multi buffering
+			plat_status_msg_clear();
+			statclr_cnt --;
+		}
+
 		pprof_end(main);
 	}
 

platform/common/emu.h

@@ -172,6 +172,7 @@ void plat_status_msg_clear(void);
 
 void plat_video_toggle_renderer(int change, int menu_call);
 void plat_video_loop_prepare(void);
+void plat_video_set_buffer(void *);
 
 void plat_update_volume(int has_changed, int is_up);
 

platform/common/menu_pico.c

@@ -168,6 +168,7 @@ static void load_progress_cb(int percent)
 		len = g_menuscreen_w;
 
 	menu_draw_begin(0, 1);
+	memcpy(g_menuscreen_ptr, g_menubg_ptr, g_menuscreen_w * g_menuscreen_h * 2);
 	dst = (unsigned short *)g_menuscreen_ptr + g_menuscreen_pp * me_sfont_h * 2;
 	for (ln = me_sfont_h - 2; ln > 0; ln--, dst += g_menuscreen_pp)
 		memset(dst, 0xff, len * 2);
@@ -182,6 +183,7 @@ static void cdload_progress_cb(const char *fname, int percent)
 	menu_draw_begin(0, 1);
 	dst = (unsigned short *)g_menuscreen_ptr + g_menuscreen_pp * me_sfont_h * 2;
 
+	memcpy(g_menuscreen_ptr, g_menubg_ptr, g_menuscreen_w * g_menuscreen_h * 2);
 	menuscreen_memset_lines(dst, 0xff, me_sfont_h - 2);
 
 	smalltext_out16(1, 3 * me_sfont_h, "Processing CD image / MP3s", 0xffff);
@@ -201,18 +203,16 @@ static void cdload_progress_cb(const char *fname, int percent)
 void menu_romload_prepare(const char *rom_name)
 {
 	const char *p = rom_name + strlen(rom_name);
-	int i;
 
 	while (p > rom_name && *p != '/')
 		p--;
 
-	/* fill all buffers, callbacks won't update in full */
-	for (i = 0; i < 3; i++) {
-		menu_draw_begin(1, 1);
-		smalltext_out16(1, 1, "Loading", 0xffff);
-		smalltext_out16(1, me_sfont_h, p, 0xffff);
-		menu_draw_end();
-	}
+	menu_draw_begin(1, 1);
+	smalltext_out16(1, 1, "Loading", 0xffff);
+	smalltext_out16(1, me_sfont_h, p, 0xffff);
+	/* background screen for callbacks */
+	memcpy(g_menubg_ptr, g_menuscreen_ptr, g_menuscreen_w * g_menuscreen_h * 2);
+	menu_draw_end();
 
 	PicoCartLoadProgressCB = load_progress_cb;
 	PicoCDLoadProgressCB = cdload_progress_cb;
@@ -225,6 +225,7 @@ void menu_romload_end(void)
 	PicoCDLoadProgressCB = NULL;
 
 	menu_draw_begin(0, 1);
+	memcpy(g_menuscreen_ptr, g_menubg_ptr, g_menuscreen_w * g_menuscreen_h * 2);
 	smalltext_out16(1, (cdload_called ? 6 : 3) * me_sfont_h,
 		"Starting emulation...", 0xffff);
 	menu_draw_end();

platform/common/plat_sdl.c

@@ -9,6 +9,7 @@
 #include <stdio.h>
 
 #include "../libpicofe/input.h"
+#include "../libpicofe/plat.h"
 #include "../libpicofe/plat_sdl.h"
 #include "../libpicofe/in_sdl.h"
 #include "../libpicofe/gl.h"
@@ -174,13 +175,14 @@ void plat_video_flip(void)
 		gl_flip(shadow_fb, g_screen_ppitch, g_screen_height);
 	}
 	else {
-		if (SDL_MUSTLOCK(plat_sdl_screen))
+		if (SDL_MUSTLOCK(plat_sdl_screen)) {
 			SDL_UnlockSurface(plat_sdl_screen);
-		SDL_Flip(plat_sdl_screen);
-		if (g_screen_ptr != shadow_fb) {
-			g_screen_ptr = plat_sdl_screen->pixels;
-			plat_video_toggle_renderer(0, 0);
-		}
+			SDL_Flip(plat_sdl_screen);
+			SDL_LockSurface(plat_sdl_screen);
+		} else
+			SDL_Flip(plat_sdl_screen);
+		g_screen_ptr = plat_sdl_screen->pixels;
+		plat_video_set_buffer(g_screen_ptr);
 	}
 }
 
@@ -190,8 +192,11 @@ void plat_video_wait_vsync(void)
 
 void plat_video_menu_enter(int is_rom_loaded)
 {
+	if (SDL_MUSTLOCK(plat_sdl_screen))
+		SDL_UnlockSurface(plat_sdl_screen);
 	plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 0);
 	g_screen_ptr = shadow_fb;
+	plat_video_set_buffer(g_screen_ptr);
 }
 
 void plat_video_menu_begin(void)
@@ -228,7 +233,6 @@ void plat_video_menu_end(void)
 		SDL_Flip(plat_sdl_screen);
 	}
 	g_menuscreen_ptr = NULL;
-
 }
 
 void plat_video_menu_leave(void)
@@ -246,8 +250,8 @@ void plat_video_loop_prepare(void)
 		if (SDL_MUSTLOCK(plat_sdl_screen))
 			SDL_LockSurface(plat_sdl_screen);
 		g_screen_ptr = plat_sdl_screen->pixels;
-		plat_video_toggle_renderer(0, 0);
 	}
+	plat_video_set_buffer(g_screen_ptr);
 }
 
 void plat_early_init(void)
@@ -268,6 +272,10 @@ void plat_init(void)
 	ret = plat_sdl_init();
 	if (ret != 0)
 		exit(1);
+#if defined(__RG350__) || defined(__GCW0__)
+	// opendingux on JZ47x0 may falsely report a HW overlay, fix to window
+	plat_target.vout_method = 0;
+#endif
 
 	plat_sdl_quit_cb = plat_sdl_quit;