Dump field_door data; start field_door decomp

2 files changed, 138 insertions, 1 deletions

diff --git a/src/field_door.c b/src/field_door.c
new file mode 100644
index 000000000..116cdddee
--- /dev/null
+++ b/src/field_door.c
@@ -0,0 +1,102 @@
+#include "global.h"
+#include "field_camera.h"
+#include "task.h"
+
+struct DoorAnimFrame
+{
+    u8 unk_0;
+    u16 unk_2;
+};
+
+struct DoorGraphics
+{
+    u16 unk_0;
+    u8 unk_2;
+    u8 unk_3;
+    const u8 * unk_4;
+    const u8 * unk_8;
+};
+
+void sub_805AF54(const struct DoorGraphics * a0, int a1, int a2);
+void sub_805AF80(const u8 *a0);
+void sub_805AF94(const struct DoorGraphics * a0, int a1, int a2, const u8 *a3);
+void sub_805AFE8(u16 *a0, u16 a1, const u8 *a2);
+bool32 sub_805B060(const struct DoorGraphics * gfx, const struct DoorAnimFrame * frames, u16 *data);
+
+extern const struct DoorAnimFrame gUnknown_835B488[];
+extern const struct DoorAnimFrame gUnknown_835B49C[];
+extern const struct DoorAnimFrame gUnknown_835B4B0[];
+extern const struct DoorAnimFrame gUnknown_835B4C4[];
+extern const struct DoorGraphics gUnknown_835B5D8[];
+
+void sub_805AF14(const struct DoorGraphics * a0, const struct DoorAnimFrame * a1, int a2, int a3)
+{
+    if (a1->unk_2 == 0xFFFF)
+    {
+        sub_805AF54(a0, a2, a3);
+    }
+    else
+    {
+        sub_805AF80(&a0->unk_4[a1->unk_2]);
+        sub_805AF94(a0, a2, a3, a0->unk_8);
+    }
+}
+
+void sub_805AF54(const struct DoorGraphics * a0, int a1, int a2)
+{
+    if (a0->unk_3 == 0)
+    {
+        CurrentMapDrawMetatileAt(a1, a2);
+    }
+    else
+    {
+        CurrentMapDrawMetatileAt(a1, a2);
+        CurrentMapDrawMetatileAt(a1, a2 - 1);
+    }
+}
+
+void sub_805AF80(const u8 *a0)
+{
+    CpuFastCopy(a0, (void *)(BG_VRAM + 0x7F00), 0x100);
+}
+
+void sub_805AF94(const struct DoorGraphics * a0, int a1, int a2, const u8 *a3)
+{
+    u16 sp00[8];
+    if (a0->unk_3 == 0)
+    {
+        sub_805AFE8(sp00, 0x3F8, a3);
+    }
+    else
+    {
+        sub_805AFE8(sp00, 0x3F8, a3);
+        sub_805A91C(a1, a2 - 1, sp00);
+        sub_805AFE8(sp00, 0x3FC, a3 + 4);
+    }
+    sub_805A91C(a1, a2, sp00);
+}
+
+void sub_805AFE8(u16 *a0, u16 a1, const u8 *a2)
+{
+    int i;
+    u16 tile;
+    for (i = 0; i < 4; i++)
+    {
+        tile = *(a2++) << 12;
+        a0[i] = tile | (a1 + i);
+    }
+    for (; i < 8; i++)
+    {
+        tile = *(a2++) << 12;
+        a0[i] = tile;
+    }
+}
+
+void sub_805B028(u8 taskId)
+{
+    u16 *data = (void *)gTasks[taskId].data;
+    const struct DoorAnimFrame * frames = (const void *)((data[0] << 16) | data[1]);
+    const struct DoorGraphics * gfx = (const void *)((data[2] << 16) | data[3]);
+    if (!sub_805B060(gfx, frames, data))
+        DestroyTask(taskId);
+}
diff --git a/src/metatile_behavior.c b/src/metatile_behavior.c
index bca99d38f..8e07c1c97 100644
--- a/src/metatile_behavior.c
+++ b/src/metatile_behavior.c
@@ -16,6 +16,41 @@ static const bool8 sTileSurfable[METATILE_COUNT] = {
     [MB_SOUTHWARD_CURRENT] = TRUE
 };
 
+static const u8 sTileBitAttributes[] = {
+    0x00,
+    0x01,
+    0x02,
+    0x04,
+    0x08,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    0x00
+};
+
 bool8 MetatileBehavior_UnusedReturnTrue(u8 metatileBehavior)
 {
     return TRUE;
@@ -736,7 +771,7 @@ bool8 MetatileBehavior_UnusedReturnFalse_13(u8 metatileBehavior) { return FALSE;
 
 bool8 sub_805A2BC(u8 arg1, u8 arg2)
 {
-    if(gUnknown_8353068[arg1] & arg2)
+    if(sTileBitAttributes[arg1] & arg2)
         return TRUE;
     else
         return FALSE;