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/**
* @file lightManager.c
* @ingroup Managers
*
* @brief Manages the light in dark rooms.
*/
#include "manager/lightManager.h"
#include "area.h"
#include "common.h"
#include "game.h"
#include "main.h"
#include "physics.h"
#include "player.h"
#include "room.h"
#include "screen.h"
#include "asm.h"
extern void sub_0801E120(void);
extern void sub_0801E154(u32);
extern void sub_0801E160(u32, u32, u32);
bool32 LerpLightLevel();
void UpdateLightAlpha();
void LightManager_Main(LightManager* this) {
s32 sVar1;
u32 uVar3;
if (gArea.lightType == 0) {
sub_0801E104();
gScreen.lcd.displayControl &= ~(DISPCNT_BG3_ON | DISPCNT_WIN0_ON);
DeleteThisEntity();
}
if (super->action == 0) {
super->action = 1;
super->flags |= ENT_PERSIST;
super->timer = 17;
this->unk20 = 0;
SetEntityPriority((Entity*)this, 6);
sub_0801E120();
sub_0801E154(super->timer);
}
if (gMain.substate == GAMEMAIN_UPDATE) {
gScreen.lcd.displayControl |= DISPCNT_BG3_ON;
LerpLightLevel();
UpdateLightAlpha();
}
if (gArea.lightType == 2) {
gScreen.lcd.displayControl &= ~DISPCNT_WIN0_ON;
} else {
if (CheckRectOnScreen(gPlayerEntity.base.x.HALF.HI - gRoomControls.origin_x,
gPlayerEntity.base.y.HALF.HI - gRoomControls.origin_y, 0, 0)) {
gScreen.lcd.displayControl |= DISPCNT_WIN0_ON;
} else {
gScreen.lcd.displayControl &= ~DISPCNT_WIN0_ON;
}
uVar3 = super->timer;
if (((gPlayerState.flags & PL_USE_LANTERN)) && (gArea.lightType)) {
if (uVar3 < 0x48) {
uVar3 += 4;
sub_0801E154(uVar3);
this->unk20 = 0;
} else if ((gRoomTransition.frameCount & 3) == 0) {
super->subtimer += 16;
sVar1 = gSineTable[super->subtimer];
this->unk20 = sVar1 >> 7;
sub_0801E154(uVar3 + this->unk20);
}
} else {
this->unk20 = 0;
if (0x11 < uVar3) {
uVar3 -= 4;
if (uVar3 < 0x11) {
uVar3 = 0x11;
}
sub_0801E154(uVar3);
}
}
super->timer = uVar3;
sub_0801E160(gPlayerEntity.base.x.HALF.HI - gRoomControls.scroll_x,
gPlayerEntity.base.y.HALF.HI - gRoomControls.scroll_y - 9 + gPlayerEntity.base.z.HALF.HI,
uVar3 + this->unk20);
}
}
#define ABS(x) ((unsigned)(x < 0 ? -(x) : x))
bool32 LerpLightLevel() {
s32 tgt;
s32 cur;
cur = (short)gArea.lightLevel;
tgt = gRoomVars.lightLevel;
tgt = max(tgt, 0);
tgt = min(tgt, 0x100);
if (cur != tgt) {
if (ABS(tgt - cur) <= 4) {
cur = tgt;
} else if (tgt < cur) {
cur -= 4;
} else if (tgt > cur) {
cur += 4;
}
gArea.lightLevel = cur;
return TRUE;
}
return FALSE;
}
extern u16 gUnk_08108CA8[];
void UpdateLightAlpha() {
static const u16 gUnk_08108CA8[] = { 0x10, 0x10f, 0x20e, 0x30d, 0x40c, 0x50b, 0x60a, 0x709, 0x808,
0x907, 0xa06, 0xb05, 0xc04, 0xd03, 0xe02, 0xf01, 0x1000, 0x00 };
if (gArea.lightType != 0) {
gScreen.controls.alphaBlend = gUnk_08108CA8[(gArea.lightLevel << 0x10) >> 0x14];
}
}
void sub_0805BB00(s32 lightLevel, s32 param_2) {
if (gArea.lightType == 0) {
Manager* pManager = GetEmptyManager();
if (pManager != 0) {
pManager->kind = MANAGER;
pManager->id = LIGHT_MANAGER;
AppendEntityToList((Entity*)pManager, 0);
}
}
MemFill16(0xf, BG_SCREEN_ADDR(0x1E), BG_SCREEN_SIZE);
gScreen.bg3.control = 0x1e0c;
gScreen.controls.layerFXControl = 0x3e48;
gRoomVars.lightLevel = lightLevel;
if (param_2) {
gArea.lightType = 1;
} else {
gArea.lightType = 2;
}
}
void sub_0805BB74(s32 lightLevel) {
LightManager* manager;
if (lightLevel < 0) {
lightLevel = gRoomVars.lightLevel;
}
gArea.lightLevel = lightLevel;
gRoomVars.lightLevel = gArea.lightLevel;
manager = (LightManager*)DeepFindEntityByID(MANAGER, LIGHT_MANAGER);
if (manager) {
LightManager_Main(manager);
gScreen.lcd.displayControl |= DISPCNT_BG3_ON;
LerpLightLevel();
UpdateLightAlpha();
}
}
bool32 UpdateLightLevel() {
bool32 iVar1;
iVar1 = FALSE;
if (gArea.lightType && gRoomVars.lightLevel < (s16)gArea.lightLevel) {
gScreen.lcd.displayControl |= DISPCNT_BG3_ON;
iVar1 = LerpLightLevel();
if (iVar1) {
UpdateLightAlpha();
}
}
return iVar1;
}
s32 sub_0805BC04(void) {
s32 iVar1;
iVar1 = 0;
if (gArea.lightType && gRoomVars.lightLevel > (short)gArea.lightLevel) {
gScreen.lcd.displayControl |= DISPCNT_BG3_ON;
iVar1 = LerpLightLevel();
if (iVar1) {
UpdateLightAlpha();
}
}
return iVar1;
}
void UnDarkRoom() {
if (gArea.lightType != 0) {
gArea.lightType = 0;
gScreen.lcd.displayControl &= ~(DISPCNT_BG3_ON | DISPCNT_WIN0_ON);
}
}
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