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#include "PR/os_internal.h"
#include "PR/ultraerror.h"
#include "PR/rcp.h"
#include "PRinternal/viint.h"
// TODO: this comes from a header
#ident "$Revision: 1.17 $"
// This value was incorrectly calculated until being fixed in 2.0J
#if BUILD_VERSION >= VERSION_J
#define OS_VI_SPECIAL_MAX \
(OS_VI_GAMMA_ON | OS_VI_GAMMA_OFF | OS_VI_GAMMA_DITHER_ON | OS_VI_GAMMA_DITHER_OFF | OS_VI_DIVOT_ON | \
OS_VI_DIVOT_OFF | OS_VI_DITHER_FILTER_ON | OS_VI_DITHER_FILTER_OFF)
#else
#define OS_VI_SPECIAL_MAX OS_VI_DITHER_FILTER_OFF
#endif
/**
* Configures VI "special features" to be applied on the next context swap.
*
* "Special features" refer to the mode bits in the Video Interface control register that enable effects such as gamma
* correction, gamma dither, dither filtering, anti-aliasing filtering and divot filtering. Configuring the same
* setting ON and OFF in the same call will result in OFF taking precedence.
*
* Any unrecognized bits will be ignored. Note that this is very intentional as in early revisions of retail N64
* hardware setting bit 5 in the `features` field of OSViContext may cause physical damage to the console once it is
* fed to VI_CONTROL_REG on next context swap.
*
* @param func OS_VI_*_ON / OS_VI_*_OFF bits to enable or disable a setting.
*/
void osViSetSpecialFeatures(u32 func) {
register u32 saveMask;
#ifdef _DEBUG
if (!__osViDevMgr.active) {
__osError(ERR_OSVISETSPECIAL_VIMGR, 0);
return;
}
if ((func < OS_VI_GAMMA_ON) || (func > OS_VI_SPECIAL_MAX)) {
__osError(ERR_OSVISETSPECIAL_VALUE, 1, func);
return;
}
#endif
saveMask = __osDisableInt();
if ((func & OS_VI_GAMMA_ON) != 0) {
__osViNext->control |= VI_CTRL_GAMMA_ON;
}
if ((func & OS_VI_GAMMA_OFF) != 0) {
__osViNext->control &= ~VI_CTRL_GAMMA_ON;
}
if ((func & OS_VI_GAMMA_DITHER_ON) != 0) {
__osViNext->control |= VI_CTRL_GAMMA_DITHER_ON;
}
if ((func & OS_VI_GAMMA_DITHER_OFF) != 0) {
__osViNext->control &= ~VI_CTRL_GAMMA_DITHER_ON;
}
if ((func & OS_VI_DIVOT_ON) != 0) {
__osViNext->control |= VI_CTRL_DIVOT_ON;
}
if ((func & OS_VI_DIVOT_OFF) != 0) {
__osViNext->control &= ~VI_CTRL_DIVOT_ON;
}
if ((func & OS_VI_DITHER_FILTER_ON) != 0) {
__osViNext->control |= VI_CTRL_DITHER_FILTER_ON;
__osViNext->control &= ~VI_CTRL_ANTIALIAS_MASK;
}
if ((func & OS_VI_DITHER_FILTER_OFF) != 0) {
__osViNext->control &= ~VI_CTRL_DITHER_FILTER_ON;
__osViNext->control |= __osViNext->modep->comRegs.ctrl & VI_CTRL_ANTIALIAS_MASK;
}
__osViNext->state |= VI_STATE_CTRL_UPDATED;
__osRestoreInt(saveMask);
}
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