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#include "fade.h"
#include "global.h"
#include "save.h"
#include "vram.h"
#include "screen.h"
#include "common.h"
static u32 sub_080501C0(FadeControl* ctl);
static u32 sub_08050230(FadeControl* ctl);
static u32 sub_080502A4(FadeControl* ctl);
typedef struct {
u8 unk0;
u8 unk1;
u16 unk2;
} struct_020354C0;
extern struct_020354C0 gUnk_020354C0[0x20];
extern u16 gPaletteBuffer[];
extern u16 gUnk_080FC3C4[];
// function pointer to overlay (0x03005e98) in ram calls rom function MakeFadeBuff256
extern u32 ram_MakeFadeBuff256;
typedef void (*fptrMakeFadeBuff256)(u8*, u8*, u16, u8);
void SetBrightness(u32 brightness) {
gSaveHeader->brightness = brightness;
gUsedPalettes = 0xffffffff;
}
void FadeVBlank(void) {
fptrMakeFadeBuff256 func;
u32 usedPalettesTmp, palIdx;
struct_020354C0* ptrUnk = gUnk_020354C0;
usedPalettesTmp = gUsedPalettes;
gUsedPalettes = 0;
palIdx = 0;
while (usedPalettesTmp != 0) {
if ((usedPalettesTmp & 1) == 1) {
func = (fptrMakeFadeBuff256)&ram_MakeFadeBuff256;
func(&((u8*)gPaletteBuffer)[palIdx], &PAL_RAM[palIdx], ptrUnk->unk2, ptrUnk->unk1);
}
palIdx += 0x20;
ptrUnk++;
usedPalettesTmp >>= 1;
}
}
void InitFade(void) {
MemClear(&gFadeControl, sizeof(gFadeControl));
MemClear(&gUnk_020354C0, sizeof(gUnk_020354C0));
gFadeControl.mask = 0xffffffff;
}
void ResetFadeMask(void) {
MemClear(&gUnk_020354C0, sizeof(gUnk_020354C0));
gFadeControl.mask = 0xFFFFFFFF;
}
static void sub_08050024(void) {
sub_0801E104();
SetFade(FADE_IN_OUT | FADE_INSTANT, 256);
}
void SetFadeProgress(u32 arg0) {
if ((gFadeControl.type & FADE_IN_OUT) != 0) {
gFadeControl.sustain = arg0;
} else {
gFadeControl.progress = arg0;
}
}
void SetFade(u32 type, u32 speed) {
gFadeControl.speed = speed;
gFadeControl.type = type;
gFadeControl.active = 1;
gFadeControl.progress = 0x100;
gFadeControl.sustain = 0;
if (gFadeControl.type & FADE_BLACK_WHITE) {
gFadeControl.color = 0xf8;
} else {
gFadeControl.color = 0;
}
if (type & FADE_MOSAIC) {
gOAMControls.spritesOffset = 1;
gScreen.bg1.control |= BGCNT_MOSAIC;
gScreen.bg2.control |= BGCNT_MOSAIC;
gScreen.bg3.control |= BGCNT_MOSAIC;
}
if (type & FADE_IRIS) {
sub_0801E1B8(gFadeControl.win_inside_cnt, gFadeControl.win_outside_cnt);
sub_0801E1EC(gFadeControl.iris_x, gFadeControl.iris_y, gFadeControl.iris_size);
if ((type & FADE_IN_OUT) == 0) {
gFadeControl.type &= ~FADE_INSTANT;
ResetFadeMask();
gUsedPalettes = 0xffffffff;
}
}
}
void SetFadeInverted(u32 speed) {
gFadeControl.speed = speed;
gFadeControl.type ^= FADE_IN_OUT;
gFadeControl.active = 1;
gFadeControl.progress = 256;
}
void SetFadeIris(u32 x, u32 y, u32 type, u32 speed) {
if ((type & FADE_IN_OUT) != 0) {
gFadeControl.iris_size = 0x96;
} else {
gFadeControl.iris_size = 0;
}
gFadeControl.iris_x = x;
gFadeControl.iris_y = y;
gFadeControl.win_inside_cnt = 0x3f3f;
gFadeControl.win_outside_cnt = 0;
SetFade(type, speed);
}
void FadeMain(void) {
FadeControl* ctl = &gFadeControl;
u32 flags = ctl->type & 0x1C;
u32 active = 0;
u32 bit;
if (ctl->active) {
ctl->progress -= ctl->speed;
if ((s16)ctl->progress <= (s16)ctl->sustain)
ctl->progress = ctl->sustain;
while (flags) {
bit = (~flags + 1) & flags;
flags ^= bit;
switch (bit) {
case 4:
active |= sub_080501C0(ctl);
break;
case 8:
active |= sub_08050230(ctl);
break;
case 16:
active |= sub_080502A4(ctl);
break;
}
}
ctl->active = active;
}
}
static u32 sub_080501C0(FadeControl* ctl) {
u32 v1;
u32 v2;
struct_020354C0* v3;
u32 i;
if (ctl->type & FADE_IN_OUT) {
v1 = 256 - (s16)ctl->progress;
} else {
v1 = (s16)ctl->progress;
}
v2 = gFadeControl.mask;
v3 = gUnk_020354C0;
for (i = 0; i < 0x20; ++i, ++v3) {
if (v2 & 1) {
v3->unk0 = 1;
v3->unk2 = v1;
} else {
v3->unk0 = 0;
v3->unk2 = 0;
}
v3->unk1 = ctl->color;
v2 >>= 1;
}
gUsedPalettes = 0xffffffff;
return !!((s16)ctl->sustain ^ (s16)ctl->progress);
}
const u16 gMosaicSizes[] = {
0, 0x1111, 0x2222, 0x3333, 0x4444, 0x5555, 0x6666, 0x7777,
0x8888, 0x9999, 0xaaaa, 0xbbbb, 0xcccc, 0xdddd, 0xeeee, 0xffff,
};
static u32 sub_08050230(FadeControl* ctl) {
u32 type = ctl->type;
u32 idx = ((s16)ctl->progress >> 4) & 0xF;
if (type & 1)
idx = 0xF - idx;
gScreen.controls.mosaicSize = gMosaicSizes[idx];
if (ctl->progress != 0)
return 1;
// fade is finished
gOAMControls.spritesOffset = 0;
if ((type & FADE_IN_OUT) == 0) {
// reset registers if fading in
gScreen.bg0.control &= ~BGCNT_MOSAIC;
gScreen.bg1.control &= ~BGCNT_MOSAIC;
gScreen.bg2.control &= ~BGCNT_MOSAIC;
gScreen.bg3.control &= ~BGCNT_MOSAIC;
}
return 0;
}
static u32 sub_080502A4(FadeControl* ctl) {
if (ctl->type & FADE_IN_OUT) {
s32 delta = (u16)gFadeControl.iris_size - gFadeControl.speed;
gFadeControl.iris_size -= gFadeControl.speed;
if (delta << 16 <= 0)
gFadeControl.iris_size = 0;
sub_0801E1EC(gFadeControl.iris_x, gFadeControl.iris_y, gFadeControl.iris_size);
if (!gFadeControl.iris_size)
return 0;
} else {
gFadeControl.iris_size += gFadeControl.speed;
sub_0801E1EC(gFadeControl.iris_x, gFadeControl.iris_y, gFadeControl.iris_size);
if (gFadeControl.iris_size > 150) {
sub_0801E104();
return 0;
}
}
return 1;
}
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