Decompile graphics group loading function

2026-08-20 06:06:54 -04:00 · 2020-08-12 19:55:11 -05:00
parent 37d1781f51
commit 4c0217a782
37 changed files with 185 additions and 223 deletions
@@ -0,0 +1,96 @@
+#include "global.h"
+#include "screen.h"
+#include "structures.h"
+
+extern u16 gPaletteBuffer[];
+extern u32 gUsedPalettes;
+
+typedef struct {
+    union {
+        int raw;
+        struct {
+            u8 filler0[0x3];
+            u8 unk3;
+        } bytes;
+    } unk0;
+    u32 dest;
+    u32 unk8;
+} GfxItem;
+
+extern const GfxItem* gUnk_08100AA8[];
+extern const u8 gGlobalGfxAndPalettes[];
+
+void sub_0801D79C(u32 colorIndex, u32 color) {
+    gPaletteBuffer[colorIndex] = color;
+    gUsedPalettes |= 1 << (colorIndex / 16);
+}
+
+void sub_0801D7BC(u32 color, u32 arg1) {
+    if (arg1) {
+        gScreen.lcd.unk6 = 0xE0FF;
+    } else {
+        gScreen.lcd.unk6 = 0xFFFF;
+    }
+    sub_0801D79C(0, color);
+}
+
+void LoadGfxGroup(u32 group) {
+    u32 terminator;
+    u32 dmaCtrl;
+    int gfxOffset;
+    const u8* src;
+    u32 dest;
+    int size;
+    const GfxItem* gfxItem = gUnk_08100AA8[group];
+    while (1) {
+        u32 loadGfx = FALSE;
+        u32 ctrl = gfxItem->unk0.bytes.unk3;
+        ctrl &= 0xF;
+        switch (ctrl) {
+            case 0x7:
+                loadGfx = TRUE;
+                break;
+            case 0xD:
+                return;
+            case 0xE:
+                if (((struct_02000000 *)0x2000000)->gameLanguage > 1) {
+                    loadGfx = TRUE;
+                }
+                break;
+            case 0xF:
+                if (((struct_02000000 *)0x2000000)->gameLanguage != 0) {
+                    loadGfx = TRUE;
+                }
+                break;
+            default:
+                if (ctrl == ((struct_02000000 *)0x2000000)->gameLanguage) {
+                    loadGfx = TRUE;
+                }
+                break;
+        }
+
+        if (loadGfx) {
+            gfxOffset = gfxItem->unk0.raw & 0xFFFFFF;
+            src = &gGlobalGfxAndPalettes[gfxOffset];
+            dest = gfxItem->dest;
+            size = gfxItem->unk8;
+            dmaCtrl = 0x80000000;
+            if (size < 0) {
+                if (dest >= VRAM) {
+                    LZ77UnCompVram(src, (void*)dest);
+                } else {
+                    LZ77UnCompWram(src, (void*)dest);
+                }
+            } else {
+                DmaSet(3, src, dest, dmaCtrl | ((u32)size >> 1));
+            }
+        }
+
+        terminator = gfxItem->unk0.bytes.unk3;
+        terminator &= 0x80;
+        gfxItem++;
+        if (!terminator) {
+            break;
+        }
+    }
+}