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3415afcf8782ea2c2f2ebfa8c304ae357fdebddc
pmd-red/src/window_buffer.c
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Evan Chang 3415afcf87 Rename window_buffer file
2026-04-30 21:41:12 -04:00

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#include "global.h"
#include "globaldata.h"
#include "bg_control.h"
#include "window_buffer.h"
#include "math.h"
#define UNROLL16(x) do { x; x; x; x; x; x; x; x; x; x; x; x; x; x; x; x; } while (0)
EWRAM_DATA bool8 gDrawWindow = FALSE;
EWRAM_DATA s16 *gWinBufferPtr = NULL;
EWRAM_DATA static s32 sUnknown_2026E40 = 0; // Read from but never written to
EWRAM_DATA static s32 sUnknown_2026E44 = 0; // Read from but never written to
EWRAM_DATA static s32 sUnknown_2026E48 = 0; // Read from but never written to
EWRAM_DATA static bool8 sInitialized = FALSE;
EWRAM_DATA s16 gUnknown_2026E4E = 0;
EWRAM_DATA static bool32 sBoolUnk = FALSE; // Toggled but is never read
EWRAM_DATA static bool32 sBufferIdx = FALSE; // Write to sBuffer0 or sBuffer1
EWRAM_DATA static s16 *sBufferPtr = NULL;
UNUSED EWRAM_DATA static u32 sUnused0 = 0;
EWRAM_DATA static s16 sBuffer0[324] = {0}; // These might be [2][162]
EWRAM_DATA static s16 sBuffer1[324] = {0};
EWRAM_INIT s16 *gWindowBgCopy = NULL;
// Rounded corners in low visibility rooms
static const s16 sRoomCornerDim[17] = {16, 12, 9, 7, 6, 5, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0, 0};
#define Y_MAX 160
#define X_MAX 240
// In corridor with heavy darkness, dim everything except a small circle
static const s16 sCorridorDim1[Y_MAX] = {
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x846C, 0x8967, 0x8C64, 0x8E62, 0x9060, 0x915F, 0x935D,
0x945C, 0x955B, 0x965A, 0x965A, 0x9759, 0x9858, 0x9858,
0x9957, 0x9957, 0x9A56, 0x9A56, 0x9A56, 0x9B55, 0x9B55,
0x9B55, 0x9B55, 0x9B55, 0x9C55, 0x9C54, 0x9C54, 0x9C54,
0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54,
0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54,
0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9C54, 0x9B55,
0x9B55, 0x9B55, 0x9B55, 0x9B55, 0x9A56, 0x9A56, 0x9A56,
0x9957, 0x9957, 0x9858, 0x9858, 0x9759, 0x965A, 0x965A,
0x955B, 0x945C, 0x935D, 0x915F, 0x9060, 0x8E62, 0x8C64,
0x8967, 0x846C, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100
};
// In corridor with light darkness, dim everything except a larger circle
static const s16 sCorridorDim2[Y_MAX] = {
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x8071, 0x866B, 0x8A67, 0x8D64, 0x8F62, 0x9160, 0x935E,
0x955C, 0x975A, 0x9958, 0x9A57, 0x9B56, 0x9D54, 0x9E53,
0xA051, 0xA051, 0xA150, 0xA24F, 0xA44D, 0xA54C, 0xA54C,
0xA64B, 0xA74A, 0xA849, 0xA948, 0xA948, 0xAA47, 0xAA47,
0xAB46, 0xAC45, 0xAC45, 0xAD44, 0xAD44, 0xAE43, 0xAE43,
0xAF42, 0xAF42, 0xB041, 0xB041, 0xB140, 0xB140, 0xB140,
0xB23F, 0xB23F, 0xB23F, 0xB23F, 0xB33E, 0xB33E, 0xB33E,
0xB33E, 0xB33E, 0xB33E, 0xB43D, 0xB43D, 0xB43D, 0xB43D,
0xB43D, 0xB43D, 0xB43D, 0xB43D, 0xB43D, 0xB43D, 0xB43D,
0xB43D, 0xB43D, 0xB43D, 0xB43D, 0xB43D, 0xB33E, 0xB33E,
0xB33E, 0xB33E, 0xB33E, 0xB33E, 0xB23F, 0xB23F, 0xB23F,
0xB23F, 0xB140, 0xB140, 0xB140, 0xB041, 0xB041, 0xAF42,
0xAF42, 0xAE43, 0xAE43, 0xAD44, 0xAD44, 0xAC45, 0xAC45,
0xAB46, 0xAA47, 0xAA47, 0xA948, 0xA948, 0xA849, 0xA74A,
0xA64B, 0xA54C, 0xA54C, 0xA44D, 0xA24F, 0xA150, 0xA051,
0xA051, 0x9E53, 0x9D54, 0x9B56, 0x9A57, 0x9958, 0x975A,
0x955C, 0x935E, 0x9160, 0x8F62, 0x8D64, 0x8A67, 0x866B,
0x8071, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
0x100
};
// Almost all 0x100 (unused?)
static const s16 gUnknown_80B82AA[Y_MAX] = {
[0 ... 2] = 0x100,
[3] = 0x9392,
[4 ... Y_MAX - 1] = 0x100
};
// All zeroes (fallback?)
static const s16 sDefaultBgH[Y_MAX] = {
[0 ... Y_MAX - 1] = 0
};
// arm9.bin::02006154
void WindowBgBufferInit(void)
{
sInitialized = TRUE;
sBufferIdx = FALSE;
sBoolUnk = TRUE;
sBufferPtr = NULL;
gWinBufferPtr = NULL;
gDrawWindow = FALSE;
gUnknown_2026E4E = 0x60C;
gWindowBgCopy = NULL;
}
// arm9.bin::02005758
void CopyWindowBgBuffer(s32 *pos, u8 kind)
{
const s16 *src1, *src2;
s16 *dst;
s32 i;
if (!sInitialized)
kind = COPY_WINDOW_BG_BUFFER_WIN0;
dst = !sBufferIdx ? sBuffer0 : sBuffer1;
src1 = gWindowBgCopy;
if (src1 == NULL)
src1 = sDefaultBgH;
sBufferPtr = dst;
switch (kind) {
case COPY_WINDOW_BG_BUFFER_WIN0:
for (i = 0; i < 10; i++) {
UNROLL16(
*dst++ = *src1++; // WIN0H
*dst++ = 0; // WIN1H (disabled)
);
}
break;
case COPY_WINDOW_BG_BUFFER_DIM2:
src2 = sCorridorDim2;
for (i = 0; i < 10; i++) {
UNROLL16(
*dst++ = *src1++; // WIN0H
*dst++ = *src2++; // WIN1H (dim)
);
}
break;
case COPY_WINDOW_BG_BUFFER_DIM1:
src2 = sCorridorDim1;
for (i = 0; i < 10; i++) {
UNROLL16(
*dst++ = *src1++; // WIN0H
*dst++ = *src2++; // WIN1H (dim)
);
}
break;
case COPY_WINDOW_BG_BUFFER_ROOM_DIM:
if ((pos[0] < 0 && pos[2] < 0)
|| (pos[1] < 0 && pos[3] < 0)
|| (pos[0] >= X_MAX && pos[2] >= X_MAX)
|| (pos[1] >= Y_MAX && pos[3] >= Y_MAX)) {
// If the camera is outside the room, dim the entire screen
for (i = 0; i < 10; i++) {
UNROLL16(*dst++ = *src1++; *dst++ = 0xF0;);
}
}
else {
s32 left;
s32 right;
for (i = 0; i < Y_MAX; i++) {
if (pos[1] > i) {
*dst++ = *src1++;
*dst++ = 256;
}
else if (pos[3] <= i) {
*dst++ = *src1++;
*dst++ = 256;
}
else {
if (i - pos[1] < 16) {
right = pos[0] + sRoomCornerDim[i - pos[1]];
left = pos[2] - sRoomCornerDim[i - pos[1]];
}
else if (pos[3] - i < 16) {
right = pos[0] + sRoomCornerDim[pos[3] - i];
left = pos[2] - sRoomCornerDim[pos[3] - i];
}
else {
right = pos[0];
left = pos[2];
}
if (right < 0)
right = 0;
if (right > X_MAX - 1)
right = X_MAX - 1;
if (left < 1)
left = 1;
if (left > X_MAX)
left = X_MAX;
*dst++ = *src1++;
// Note this is backwards so the dim window is drawn on the outside
*dst++ = (left << 8) | right;
}
}
}
break;
case COPY_WINDOW_BG_BUFFER_UNK4:
src2 = gUnknown_80B82AA;
for (i = 0; i < 15; i++) {
UNROLL16(*dst++ = *src1++; *dst++ = *src2++;);
}
break;
case COPY_WINDOW_BG_BUFFER_UNK5: {
s32 r8;
s32 sp14;
s32 uVar7;
s32 sp10;
s32 iVar11;
s32 val1;
s32 val2;
s32 val3;
s32 spC;
s32 j, k;
for (i = 0; i < 15; i++) {
UNROLL16(*dst++ = *src1++; *dst++ = 256;);
}
val1 = sUnknown_2026E40;
val2 = sUnknown_2026E44;
val3 = sUnknown_2026E48;
spC = 0x400 / (val3 / 256 + 1);
iVar11 = val2 / 256;
k = iVar11;
j = iVar11;
for (sp10 = 0; sp10 < 0x400; sp10 += spC) {
s32 tmp1 = sin_4096(sp10) * val3 / 256;
sp14 = (val2 + tmp1) / 256;
r8 = (val2 - tmp1) / 256;
if (j < sp14 || k > r8) {
s32 tmp2 = cos_4096(sp10) * val3 / 256;
s32 iVar5 = (val1 - tmp2) / 256;
s32 iVar3 = (val1 + tmp2) / 256;
if (iVar5 < 0)
iVar5 = 0;
if (iVar3 < 0)
iVar3 = 0;
if (iVar5 > 240 - 1)
iVar5 = 160 - 1;
if (iVar3 > 240 - 1)
iVar3 = 160 - 1;
if (iVar5 > iVar3)
uVar7 = (iVar5 << 8) | iVar3;
else
uVar7 = (iVar3 << 8) | iVar5;
for (; j < sp14; j++) {
if (j < 0)
continue;
if (j >= 160)
continue;
if (!sBufferIdx)
sBuffer0[j * 2 + 1] = uVar7;
else
sBuffer1[j * 2 + 1] = uVar7;
}
for (; k > r8; k--) {
if (k < 0)
continue;
if (k >= 160)
continue;
if (!sBufferIdx)
sBuffer0[k * 2 + 1] = uVar7;
else
sBuffer1[k * 2 + 1] = uVar7;
}
}
}
break;
}
}
}
#if (GAME_VERSION == VERSION_RED)
UNUSED static void sub_80060A8(void)
{
gWinBufferPtr = sBufferPtr;
sBufferIdx = !sBufferIdx;
sBoolUnk = !sBoolUnk;
gDrawWindow = FALSE;
}
#endif
// arm9.bin::020056C0
void ToggleWindowBgBuffer(void)
{
gWinBufferPtr = sBufferPtr;
sBufferIdx = !sBufferIdx;
sBoolUnk = !sBoolUnk;
SetBldAlphaReg((gUnknown_2026E4E & 0x1F00) >> 8, gUnknown_2026E4E & 0x1F);
gDrawWindow = TRUE;
}
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