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RISC OS: GUI: Clean up alpha sprite support test.

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This commit is contained in:
Michael Drake 2021-06-25 18:08:17 +01:00
parent 9f3d012650
commit 407e20578f
1 changed files with 10 additions and 12 deletions
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22
frontends/riscos/gui.c
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@ -1112,9 +1112,11 @@ static void ro_gui_check_resolvers(void)
}
/**
* Set global variable for whether the OS version supports alpha channels.
* Determine whether the OS version supports alpha channels.
*
* \return true iff alpha channels are supported, false otherwise.
*/
static void ro_gui__check_os_alpha_sprites(void)
static bool ro_gui__os_alpha_sprites_supported(void)
{
os_error *error;
int var_val;
@ -1126,17 +1128,10 @@ static void ro_gui__check_os_alpha_sprites(void)
if (error) {
NSLOG(netsurf, ERROR, "xos_read_mode_variable: 0x%x: %s",
error->errnum, error->errmess);
return;
return false;
}
if (var_val == (1 << 15)) {
os_alpha_sprite_supported = true;
} else {
os_alpha_sprite_supported = false;
}
NSLOG(netsurf, INFO, "OS supports alpha sprites: %s (%i)",
os_alpha_sprite_supported ? "yes" : "no", var_val);
return (var_val == (1 << 15));
}
/**
@ -1179,7 +1174,10 @@ static nserror gui_init(int argc, char** argv)
* (remember that it's preferable to check for specific features
* being present) */
xos_byte(osbyte_IN_KEY, 0, 0xff, &os_version, NULL);
ro_gui__check_os_alpha_sprites();
os_alpha_sprite_supported = ro_gui__os_alpha_sprites_supported();
NSLOG(netsurf, INFO, "OS supports alpha sprites: %s",
os_alpha_sprite_supported ? "yes" : "no");
/* the first release version of the A9home OS is incapable of
plotting patterned lines (presumably a fault in the hw acceleration) */