X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Flibretro.c;h=23f0694effbdc90ebf45d7a9a267f13e529a96f9;hb=40d22a8e7610b2fdde5cfe6178605262ef0d61d7;hp=49038471e8a7040e2221df77ad9a75f7d249db07;hpb=b08a2950f1f213508c653c6289bf0c006082c6c5;p=picodrive.git

diff --git a/platform/libretro.c b/platform/libretro.c
index 4903847..23f0694 100644
--- a/platform/libretro.c
+++ b/platform/libretro.c
@@ -39,7 +39,7 @@ static FILE *emu_log;
 #define VOUT_MAX_WIDTH 320
 #define VOUT_MAX_HEIGHT 240
 static void *vout_buf;
-static int vout_width, vout_height;
+static int vout_width, vout_height, vout_offset;
 
 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
 
@@ -251,6 +251,9 @@ void emu_video_mode_change(int start_line, int line_count, int is_32cols)
 	memset(vout_buf, 0, 320 * 240 * 2);
 	vout_width = is_32cols ? 256 : 320;
 	PicoDrawSetOutBuf(vout_buf, vout_width * 2);
+
+	vout_height = line_count;
+	vout_offset = vout_width * start_line;
 }
 
 void emu_32x_startup(void)
@@ -292,6 +295,8 @@ void retro_set_environment(retro_environment_t cb)
 		//{ "region", "Region; Auto|NTSC|PAL" },
 		{ "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
 		{ "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
+		{ "picodrive_sprlim", "No sprite limit; disabled|enabled" },
+		{ "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
 #ifdef DRC_SH2
 		{ "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
 #endif
@@ -333,10 +338,10 @@ void retro_get_system_av_info(struct retro_system_av_info *info)
 	info->timing.fps            = Pico.m.pal ? 50 : 60;
 	info->timing.sample_rate    = 44100;
 	info->geometry.base_width   = 320;
-	info->geometry.base_height  = 240;
+	info->geometry.base_height  = vout_height;
 	info->geometry.max_width    = VOUT_MAX_WIDTH;
 	info->geometry.max_height   = VOUT_MAX_HEIGHT;
-	info->geometry.aspect_ratio = 4.0 / 3.0;
+	info->geometry.aspect_ratio = 0.0f;
 }
 
 /* savestates */
@@ -495,7 +500,7 @@ static unsigned int disk_get_image_index(void)
 
 static bool disk_set_image_index(unsigned int index)
 {
-	cd_img_type cd_type;
+	enum cd_img_type cd_type;
 	int ret;
 
 	if (index >= sizeof(disks) / sizeof(disks[0]))
@@ -516,7 +521,7 @@ static bool disk_set_image_index(unsigned int index)
 	ret = -1;
 	cd_type = PicoCdCheck(disks[index].fname, NULL);
 	if (cd_type != CIT_NOT_CD)
-		ret = Insert_CD(disks[index].fname, cd_type);
+		ret = cdd_load(disks[index].fname, cd_type);
 	if (ret != 0) {
 		lprintf("Load failed, invalid CD image?\n");
 		return 0;
@@ -704,7 +709,7 @@ bool retro_load_game(const struct retro_game_info *info)
 	PicoWriteSound = snd_write;
 	memset(sndBuffer, 0, sizeof(sndBuffer));
 	PsndOut = sndBuffer;
-	PsndRerate(1);
+	PsndRerate(0);
 
 	return true;
 }
@@ -736,14 +741,25 @@ void *retro_get_memory_data(unsigned id)
 
 size_t retro_get_memory_size(unsigned id)
 {
+	unsigned int i;
+	int sum;
+
 	if (id != RETRO_MEMORY_SAVE_RAM)
 		return 0;
 
 	if (PicoAHW & PAHW_MCD)
 		// bram
 		return 0x2000;
-	else
+
+	if (Pico.m.frame_count == 0)
 		return SRam.size;
+
+	// if game doesn't write to sram, don't report it to
+	// libretro so that RA doesn't write out zeroed .srm
+	for (i = 0, sum = 0; i < SRam.size; i++)
+		sum |= SRam.data[i];
+
+	return (sum != 0) ? SRam.size : 0;
 }
 
 void retro_reset(void)
@@ -799,6 +815,24 @@ static void update_variables(void)
 	if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
 		PicoSetInputDevice(1, input_name_to_val(var.value));
 
+	var.value = NULL;
+	var.key = "picodrive_sprlim";
+	if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
+		if (strcmp(var.value, "enabled") == 0)
+			PicoOpt |= POPT_DIS_SPRITE_LIM;
+		else
+			PicoOpt &= ~POPT_DIS_SPRITE_LIM;
+	}
+
+	var.value = NULL;
+	var.key = "picodrive_ramcart";
+	if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
+		if (strcmp(var.value, "enabled") == 0)
+			PicoOpt |= POPT_EN_MCD_RAMCART;
+		else
+			PicoOpt &= ~POPT_EN_MCD_RAMCART;
+	}
+
 #ifdef DRC_SH2
 	var.value = NULL;
 	var.key = "picodrive_drc";
@@ -829,7 +863,8 @@ void retro_run(void)
 
 	PicoFrame();
 
-	video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
+	video_cb((short *)vout_buf + vout_offset,
+		vout_width, vout_height, vout_width * 2);
 }
 
 void retro_init(void)
@@ -858,7 +893,6 @@ void retro_init(void)
 #endif
 	PsndRate = 44100;
 	PicoAutoRgnOrder = 0x184; // US, EU, JP
-	PicoCDBuffers = 0;
 
 	vout_width = 320;
 	vout_height = 240;