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Merge pull request #108 from arakerlu/testing2

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Add new core option: Core-provided aspect ratio.
This commit is contained in:
ekeeke 2016-09-19 13:27:52 +02:00 committed by GitHub
commit b860e3cb8a
3 changed files with 71 additions and 16 deletions
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3
core/system.h
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@ -82,7 +82,8 @@ typedef struct
int h; /* Height of viewport */
int ow; /* Previous width of viewport */
int oh; /* Previous height of viewport */
int changed; /* 1= Viewport width or height have changed */
int changed; /* 1= Viewport width, height or aspect_ratio have changed, and use RETRO_ENVIRONMENT_SET_GEOMETRY,
8= Identical to value 1 but use RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO */
} viewport;
} t_bitmap;

83
libretro/libretro.c
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@ -56,6 +56,7 @@ char CART_BRAM[256];
static int vwidth;
static int vheight;
static double vaspect_ratio;
static uint32_t brm_crc[2];
static uint8_t brm_format[0x40] =
@ -479,6 +480,7 @@ static void config_default(void)
/* video options */
config.overscan = 0;
config.aspect_ratio = 0;
config.gg_extra = 0;
config.ntsc = 0;
config.lcd = 0;
@ -695,13 +697,46 @@ static void extract_directory(char *buf, const char *path, size_t size)
buf[0] = '\0';
}
static double calculate_display_aspect_ratio(void)
{
if (config.aspect_ratio == 0)
{
if ((system_hw == SYSTEM_GG || system_hw == SYSTEM_GGMS) && config.overscan == 0 && config.gg_extra == 0)
{
return (6.0 / 5.0) * ((double)vwidth / (double)vheight);
}
}
bool is_h40 = bitmap.viewport.w == 320; /* Could be read directly from the register as well. */
double dotrate = system_clock / (is_h40 ? 8.0 : 10.0);
double videosamplerate;
if (config.aspect_ratio == 1) /* Force NTSC PAR */
{
videosamplerate = 135000000.0 / 11.0;
}
else if (config.aspect_ratio == 2) /* Force PAL PAR */
{
videosamplerate = 14750000.0;
}
else
{
videosamplerate = vdp_pal ? 14750000.0 : 135000000.0 / 11.0;
}
return (videosamplerate / dotrate) * ((double)vwidth / ((double)vheight * 2.0));
}
static bool update_viewport(void)
{
int ow = vwidth;
int oh = vheight;
double oar = vaspect_ratio;
vwidth = bitmap.viewport.w + (bitmap.viewport.x * 2);
vheight = bitmap.viewport.h + (bitmap.viewport.y * 2);
vaspect_ratio = calculate_display_aspect_ratio();
if (config.ntsc)
{
@ -715,8 +750,7 @@ static bool update_viewport(void)
{
vheight = vheight * 2;
}
return ((ow != vwidth) || (oh != vheight));
return ((ow != vwidth) || (oh != vheight) || (oar != vaspect_ratio));
}
static void check_variables(void)
@ -892,12 +926,7 @@ static void check_variables(void)
break;
}
/* force overscan change */
bitmap.viewport.changed = 3;
/* reinitialize libretro audio/video timings */
retro_get_system_av_info(&info);
environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &info);
update_viewports = true;
}
}
}
@ -1047,6 +1076,20 @@ static void check_variables(void)
update_viewports = true;
}
var.key = "genesis_plus_gx_aspect_ratio";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
{
orig_value = config.aspect_ratio;
if (strcmp(var.value, "NTSC PAR") == 0)
config.aspect_ratio = 1;
else if (strcmp(var.value, "PAL PAR") == 0)
config.aspect_ratio = 2;
else
config.aspect_ratio = 0;
if (orig_value != config.aspect_ratio)
update_viewports = true;
}
var.key = "genesis_plus_gx_render";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
{
@ -1084,11 +1127,12 @@ static void check_variables(void)
system_init();
system_reset();
memcpy(sram.sram, temp, sizeof(temp));
update_viewports = true;
}
if (update_viewports)
{
bitmap.viewport.changed = 3;
bitmap.viewport.changed = 11;
if ((system_hw == SYSTEM_GG) && !config.gg_extra)
bitmap.viewport.x = (config.overscan & 2) ? 14 : -48;
else
@ -1448,6 +1492,7 @@ void retro_set_environment(retro_environment_t cb)
{ "genesis_plus_gx_lcd_filter", "LCD Ghosting filter; disabled|enabled" },
{ "genesis_plus_gx_overscan", "Borders; disabled|top/bottom|left/right|full" },
{ "genesis_plus_gx_gg_extra", "Game Gear extended screen; disabled|enabled" },
{ "genesis_plus_gx_aspect_ratio", "Core-provided aspect ratio; auto|NTSC PAR|PAL PAR" },
{ "genesis_plus_gx_render", "Interlaced mode 2 output; single field|double field" },
{ "genesis_plus_gx_gun_cursor", "Show Lightgun crosshair; no|yes" },
{ "genesis_plus_gx_invert_mouse", "Invert Mouse Y-axis; no|yes" },
@ -1635,7 +1680,7 @@ void retro_get_system_av_info(struct retro_system_av_info *info)
info->geometry.base_height = vheight;
info->geometry.max_width = 720;
info->geometry.max_height = 576;
info->geometry.aspect_ratio = 4.0 / 3.0;
info->geometry.aspect_ratio = vaspect_ratio;
info->timing.fps = (double)(system_clock) / (double)lines_per_frame / (double)MCYCLES_PER_LINE;
info->timing.sample_rate = 44100;
}
@ -2035,14 +2080,22 @@ void retro_run(void)
else
system_frame_sms(0);
if (bitmap.viewport.changed & 1)
if (bitmap.viewport.changed & 9)
{
bool geometry_updated = update_viewport();
bitmap.viewport.changed &= ~1;
if (update_viewport())
if (bitmap.viewport.changed & 8)
{
struct retro_system_av_info info;
retro_get_system_av_info(&info);
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &info.geometry);
struct retro_system_av_info info;
bitmap.viewport.changed &= ~8;
retro_get_system_av_info(&info);
environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &info);
}
else if (geometry_updated)
{
struct retro_system_av_info info;
retro_get_system_av_info(&info);
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &info.geometry);
}
}

1
libretro/osd.h
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@ -64,6 +64,7 @@ struct
uint8 bios;
uint8 lock_on;
uint8 overscan;
uint8 aspect_ratio;
uint8 ntsc;
uint8 lcd;
uint8 gg_extra;