diff options
Diffstat (limited to 'games-emulation/gngb/files/gngb-20060309-joystick.patch')
| -rw-r--r-- | games-emulation/gngb/files/gngb-20060309-joystick.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/games-emulation/gngb/files/gngb-20060309-joystick.patch b/games-emulation/gngb/files/gngb-20060309-joystick.patch new file mode 100644 index 000000000000..ec5003a52c61 --- /dev/null +++ b/games-emulation/gngb/files/gngb-20060309-joystick.patch @@ -0,0 +1,56 @@ +From: Markus Koschany <apo@debian.org> +Date: Wed, 16 Aug 2017 23:25:30 +0200 +Subject: joystick axis + +Bug-Debian: https://bugs.debian.org/592777 +Forwarded: http://m.peponas.free.fr/gngb/news.html +Origin: http://m.peponas.free.fr/gngb/download/memory.c.diff +--- + src/memory.c | 17 +++++++++++++++++ + 1 file changed, 17 insertions(+) + +diff --git a/src/memory.c b/src/memory.c +index fd06738..9eaef1f 100644 +--- a/src/memory.c ++++ b/src/memory.c +@@ -67,7 +67,11 @@ Uint8 ram_mask; + MEM_READ_ENTRY mem_read_tab[0x10]; + MEM_WRITE_ENTRY mem_write_tab[0x10]; + ++/* doesn't work for negative joy_?_min */ ++/* + Sint16 joy_x_min=0;joy_x_max=0;joy_y_min=0;joy_y_max=0; ++*/ ++Sint16 joy_x_min=-32767;joy_x_max=32767;joy_y_min=-32767;joy_y_max=32767; + + void (*select_rom_page)(Uint16 adr,Uint8 v); + void (*select_ram_page)(Uint16 adr,Uint8 v); +@@ -755,15 +759,28 @@ extern __inline__ void update_gb_pad(void) { + Sint16 joy_x_pos=joy_axis[jmap[PAD_LEFT]]; + Sint16 joy_y_pos=joy_axis[jmap[PAD_UP]]; + ++ /* unnecessary if joy_?_min and joy_?_max are minimum and maximum ++ * values of Sint16 + if (joy_x_pos>joy_x_max) joy_x_max=joy_x_pos; + if (joy_x_pos<joy_x_min) joy_x_min=joy_x_pos; + if (joy_y_pos>joy_y_max) joy_y_max=joy_y_pos; + if (joy_y_pos<joy_y_min) joy_y_min=joy_y_pos; ++ */ + ++ /* this doesn't work when joy_x_min or joy_y_min < 0 (mid should be ~0), ++ * because ((+max) - (-min)) / 2 = ((+max) + (+min)) / 2 + Sint16 joy_x_mid=(joy_x_max-joy_x_min) / 2; + Sint16 joy_y_mid=(joy_y_max-joy_y_min) / 2; ++ */ ++ Sint16 joy_x_mid=(joy_x_max+joy_x_min) >> 1; ++ Sint16 joy_y_mid=(joy_y_max+joy_y_min) >> 1; ++ /* this doesn't work as joy_x_mid or joy_y_mid approaches 0 + Sint16 joy_x_qua=joy_x_mid / 2; + Sint16 joy_y_qua=joy_y_mid / 2; ++ */ ++ /* (difference) / 100 = 1% of possible values */ ++ Sint16 joy_x_qua=(joy_x_max - joy_x_min) / 100; ++ Sint16 joy_y_qua=(joy_y_max - joy_y_min) / 100; + + if ((joy_x_pos<(joy_x_mid-joy_x_qua)) || (key[kmap[PAD_LEFT]])) gb_pad|=0x20; + if ((joy_x_pos>(joy_x_mid+joy_x_qua)) || (key[kmap[PAD_RIGHT]])) gb_pad|=0x10; |