diff options
| author | Adrien Plazas <kekun.plazas@laposte.net> | 2020-12-12 09:48:29 +0100 |
|---|---|---|
| committer | twinaphex <libretro@gmail.com> | 2021-03-12 08:42:23 +0100 |
| commit | 2bd5e3e0f80821d2439ddaad04281fae4fba63a1 (patch) | |
| tree | cb30edfb1b952153c0d1cb55e193f6e81466863a /libblastem.c | |
| parent | ddf3066c6e72700cf355c75eeb541af9e594cd45 (diff) | |
libretro: Correctly calculate the aspect ratio
This ensures the aspect ratio is correctly calculated at all time, for
W40 and W32, for NTSC and PAL, and with any overscan.
The calculation was wrong in render_framebuffer_updated().
Diffstat (limited to 'libblastem.c')
| -rw-r--r-- | libblastem.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/libblastem.c b/libblastem.c index 819f2fa..29dc54c 100644 --- a/libblastem.c +++ b/libblastem.c @@ -129,6 +129,13 @@ static void update_overscan(void) } } +static float get_aspect_ratio(void) +{ + float aspect_width = LINEBUF_SIZE - overscan_left - overscan_right; + float aspect_height = (video_standard == VID_NTSC ? 243 : 294) - overscan_top - overscan_bot; + return aspect_width / aspect_height; +} + static int32_t sample_rate; RETRO_API void retro_get_system_av_info(struct retro_system_av_info *info) { @@ -138,7 +145,7 @@ RETRO_API void retro_get_system_av_info(struct retro_system_av_info *info) info->geometry.base_height = (video_standard == VID_NTSC ? 243 : 294) - (overscan_top + overscan_bot); last_height = info->geometry.base_height; info->geometry.max_height = info->geometry.base_height * 2; - info->geometry.aspect_ratio = 0; + info->geometry.aspect_ratio = get_aspect_ratio(); double master_clock = video_standard == VID_NTSC ? 53693175 : 53203395; double lines = video_standard == VID_NTSC ? 262 : 313; info->timing.fps = master_clock / (3420.0 * lines); @@ -368,7 +375,7 @@ void render_framebuffer_updated(uint8_t which, int width) struct retro_game_geometry geometry = { .base_width = width, .base_height = height, - .aspect_ratio = (float)LINEBUF_SIZE / base_height + .aspect_ratio = get_aspect_ratio() }; retro_environment(RETRO_ENVIRONMENT_SET_GEOMETRY, &geometry); last_width = width; |