decompile decompress.s

1 files changed, 597 insertions, 0 deletions

diff --git a/src/decompress.c b/src/decompress.c
new file mode 100644
index 000000000..4a5c7a297
--- /dev/null
+++ b/src/decompress.c
@@ -0,0 +1,597 @@
+#include "global.h"
+#include "decompress.h"
+#include "species.h"
+#include "text.h"
+#include "malloc.h"
+
+EWRAM_DATA ALIGNED(4) u8 gDecompressionBuffer[0x4000] = {0};
+
+extern const struct CompressedSpriteSheet gMonFrontPicTable[];
+extern const struct CompressedSpriteSheet gMonBackPicTable[];
+
+extern void DrawSpindaSpots(u16 species, u32 personality, void* dest, bool8 isFrontPic);
+
+static void DuplicateDeoxysTiles(void *pointer, s32 species);
+
+void LZDecompressWram(const void *src, void *dest)
+{
+    LZ77UnCompWram(src, dest);
+}
+
+void LZDecompressVram(const void *src, void *dest)
+{
+    LZ77UnCompVram(src, dest);
+}
+
+u16 LoadCompressedObjectPic(const struct CompressedSpriteSheet *src)
+{
+    struct SpriteSheet dest;
+
+    LZ77UnCompWram(src->data, gDecompressionBuffer);
+    dest.data = gDecompressionBuffer;
+    dest.size = src->size;
+    dest.tag = src->tag;
+    return LoadSpriteSheet(&dest);
+}
+
+void LoadCompressedObjectPicOverrideBuffer(const struct CompressedSpriteSheet *src, void *buffer)
+{
+    struct SpriteSheet dest;
+
+    LZ77UnCompWram(src->data, buffer);
+    dest.data = buffer;
+    dest.size = src->size;
+    dest.tag = src->tag;
+    LoadSpriteSheet(&dest);
+}
+
+void LoadCompressedObjectPalette(const struct CompressedSpritePalette *src)
+{
+    struct SpritePalette dest;
+
+    LZ77UnCompWram(src->data, gDecompressionBuffer);
+    dest.data = (void*) gDecompressionBuffer;
+    dest.tag = src->tag;
+    LoadSpritePalette(&dest);
+}
+
+void LoadCompressedObjectPaletteOverrideBuffer(const struct CompressedSpritePalette *a, void *buffer)
+{
+    struct SpritePalette dest;
+
+    LZ77UnCompWram(a->data, buffer);
+    dest.data = buffer;
+    dest.tag = a->tag;
+    LoadSpritePalette(&dest);
+}
+
+void DecompressPicFromTable(const struct CompressedSpriteSheet *src, void* buffer, s32 species)
+{
+    if (species > SPECIES_EGG)
+        LZ77UnCompWram(gMonFrontPicTable[0].data, buffer);
+    else
+        LZ77UnCompWram(src->data, buffer);
+    DuplicateDeoxysTiles(buffer, species);
+}
+
+void HandleLoadSpecialPokePic(const struct CompressedSpriteSheet *src, void *dest, s32 species, u32 personality)
+{
+    bool8 isFrontPic;
+
+    if (src == &gMonFrontPicTable[species])
+        isFrontPic = TRUE; // frontPic
+    else
+        isFrontPic = FALSE; // backPic
+
+    LoadSpecialPokePic_2(src, dest, species, personality, isFrontPic);
+}
+
+void LoadSpecialPokePic(const struct CompressedSpriteSheet *src, void *dest, s32 species, u32 personality, bool8 isFrontPic)
+{
+    if (species == SPECIES_UNOWN)
+    {
+        u16 i = (((personality & 0x3000000) >> 18) | ((personality & 0x30000) >> 12) | ((personality & 0x300) >> 6) | (personality & 3)) % 0x1C;
+
+        // The other Unowns are separate from Unown A.
+        if (i == 0)
+            i = SPECIES_UNOWN;
+        else
+            i += SPECIES_UNOWN_B - 1;
+
+        if (!isFrontPic)
+            LZ77UnCompWram(gMonBackPicTable[i].data, dest);
+        else
+            LZ77UnCompWram(gMonFrontPicTable[i].data, dest);
+    }
+    else if (species > SPECIES_EGG) // is species unknown? draw the ? icon
+        LZ77UnCompWram(gMonFrontPicTable[0].data, dest);
+    else
+        LZ77UnCompWram(src->data, dest);
+
+    DuplicateDeoxysTiles(dest, species);
+    DrawSpindaSpots(species, personality, dest, isFrontPic);
+}
+
+void Unused_LZDecompressWramIndirect(const void **src, void *dest)
+{
+    LZ77UnCompWram(*src, dest);
+}
+
+// This one (unused) function is really challenging, won't even try to decompile it.
+__attribute__((naked))
+void sub_803471C()
+{
+    asm(".syntax unified\n\
+        push {r4-r7,lr}\n\
+	mov r7, r10\n\
+	mov r6, r9\n\
+	mov r5, r8\n\
+	push {r5-r7}\n\
+	sub sp, 0x24\n\
+	mov r9, r0\n\
+	str r1, [sp]\n\
+	str r2, [sp, 0x4]\n\
+	adds r5, r3, 0\n\
+	movs r0, 0x1\n\
+	mov r1, r9\n\
+	ands r0, r1\n\
+	cmp r0, 0\n\
+	bne _0803473C\n\
+	b _080348D4\n\
+_0803473C:\n\
+	asrs r0, r1, 1\n\
+	adds r0, 0x4\n\
+	lsls r0, 24\n\
+	lsrs r0, 24\n\
+	str r0, [sp, 0x8]\n\
+	movs r0, 0\n\
+	ldr r2, [sp]\n\
+	cmp r0, r2\n\
+	blt _08034750\n\
+	b _08034964\n\
+_08034750:\n\
+	movs r4, 0x8\n\
+	subs r1, r4, r1\n\
+	str r1, [sp, 0x10]\n\
+_08034756:\n\
+	movs r7, 0\n\
+	adds r0, 0x1\n\
+	str r0, [sp, 0x14]\n\
+	ldr r0, [sp, 0x10]\n\
+	cmp r7, r0\n\
+	bge _080347D2\n\
+	ldr r1, [sp, 0x8]\n\
+	lsls r1, 8\n\
+	str r1, [sp, 0x18]\n\
+	movs r2, 0\n\
+	mov r10, r2\n\
+	mov r0, r9\n\
+	movs r4, 0x8\n\
+	subs r0, r4, r0\n\
+	str r0, [sp, 0xC]\n\
+_08034774:\n\
+	movs r3, 0\n\
+	asrs r0, r7, 1\n\
+	adds r1, r7, 0\n\
+	movs r2, 0x1\n\
+	ands r1, r2\n\
+	str r1, [sp, 0x20]\n\
+	lsls r0, 8\n\
+	mov r8, r0\n\
+	mov r12, r5\n\
+_08034786:\n\
+	lsls r1, r3, 5\n\
+	ldr r4, [sp, 0x18]\n\
+	adds r0, r5, r4\n\
+	adds r0, r1\n\
+	mov r1, r8\n\
+	adds r2, r0, r1\n\
+	mov r1, r12\n\
+	add r1, r8\n\
+	movs r6, 0xF\n\
+_08034798:\n\
+	ldr r4, [sp, 0x20]\n\
+	cmp r4, 0\n\
+	bne _080347A8\n\
+	strb r4, [r1]\n\
+	add r4, sp, 0x20\n\
+	ldrb r4, [r4]\n\
+	strb r4, [r2, 0x10]\n\
+	b _080347B6\n\
+_080347A8:\n\
+	mov r0, r10\n\
+	strb r0, [r1, 0x10]\n\
+	movs r4, 0x80\n\
+	lsls r4, 1\n\
+	adds r4, r2, r4\n\
+	str r4, [sp, 0x1C]\n\
+	strb r0, [r4]\n\
+_080347B6:\n\
+	adds r2, 0x1\n\
+	adds r1, 0x1\n\
+	subs r6, 0x1\n\
+	cmp r6, 0\n\
+	bge _08034798\n\
+	movs r0, 0x20\n\
+	add r12, r0\n\
+	adds r3, 0x1\n\
+	cmp r3, 0x7\n\
+	ble _08034786\n\
+	adds r7, 0x1\n\
+	ldr r1, [sp, 0xC]\n\
+	cmp r7, r1\n\
+	blt _08034774\n\
+_080347D2:\n\
+	movs r7, 0\n\
+	movs r2, 0\n\
+_080347D6:\n\
+	movs r6, 0\n\
+	adds r4, r7, 0x1\n\
+	mov r8, r4\n\
+	lsls r4, r7, 5\n\
+_080347DE:\n\
+	adds r0, r6, 0x1\n\
+	mov r10, r0\n\
+	lsls r1, r6, 8\n\
+	adds r0, r1, 0\n\
+	adds r0, 0xC0\n\
+	adds r0, r5, r0\n\
+	adds r0, r4\n\
+	adds r1, r5, r1\n\
+	adds r1, r4\n\
+	movs r3, 0x1F\n\
+_080347F2:\n\
+	strb r2, [r1]\n\
+	strb r2, [r0]\n\
+	adds r0, 0x1\n\
+	adds r1, 0x1\n\
+	subs r3, 0x1\n\
+	cmp r3, 0\n\
+	bge _080347F2\n\
+	mov r6, r10\n\
+	cmp r6, 0x7\n\
+	ble _080347DE\n\
+	mov r7, r8\n\
+	cmp r7, 0x1\n\
+	ble _080347D6\n\
+	mov r1, r9\n\
+	cmp r1, 0x5\n\
+	bne _08034818\n\
+	movs r2, 0x90\n\
+	lsls r2, 1\n\
+	adds r5, r2\n\
+_08034818:\n\
+	movs r7, 0\n\
+	cmp r7, r9\n\
+	bge _080348AE\n\
+_0803481E:\n\
+	movs r3, 0\n\
+	adds r7, 0x1\n\
+	mov r8, r7\n\
+	cmp r3, r9\n\
+	bge _0803488E\n\
+_08034828:\n\
+	adds r3, 0x1\n\
+	mov r10, r3\n\
+	ldr r4, [sp, 0x4]\n\
+	adds r4, 0x20\n\
+	adds r7, r5, 0\n\
+	adds r7, 0x20\n\
+	movs r0, 0x12\n\
+	adds r0, r5\n\
+	mov r12, r0\n\
+	ldr r2, [sp, 0x4]\n\
+	adds r3, r5, 0\n\
+	movs r6, 0x3\n\
+_08034840:\n\
+	ldrb r0, [r2]\n\
+	mov r1, r12\n\
+	strb r0, [r1]\n\
+	ldrb r0, [r2, 0x1]\n\
+	strb r0, [r1, 0x1]\n\
+	ldrb r0, [r2, 0x2]\n\
+	strb r0, [r1, 0x1E]\n\
+	ldrb r0, [r2, 0x3]\n\
+	strb r0, [r1, 0x1F]\n\
+	movs r0, 0x81\n\
+	lsls r0, 1\n\
+	adds r1, r3, r0\n\
+	ldrb r0, [r2, 0x10]\n\
+	strb r0, [r1]\n\
+	ldr r0, =0x00000103\n\
+	adds r1, r3, r0\n\
+	ldrb r0, [r2, 0x11]\n\
+	strb r0, [r1]\n\
+	movs r0, 0x90\n\
+	lsls r0, 1\n\
+	adds r1, r3, r0\n\
+	ldrb r0, [r2, 0x12]\n\
+	strb r0, [r1]\n\
+	ldr r0, =0x00000121\n\
+	adds r1, r3, r0\n\
+	ldrb r0, [r2, 0x13]\n\
+	strb r0, [r1]\n\
+	movs r1, 0x4\n\
+	add r12, r1\n\
+	adds r2, 0x4\n\
+	adds r3, 0x4\n\
+	subs r6, 0x1\n\
+	cmp r6, 0\n\
+	bge _08034840\n\
+	str r4, [sp, 0x4]\n\
+	adds r5, r7, 0\n\
+	mov r3, r10\n\
+	cmp r3, r9\n\
+	blt _08034828\n\
+_0803488E:\n\
+	mov r2, r9\n\
+	cmp r2, 0x7\n\
+	bne _080348A0\n\
+	adds r5, 0x20\n\
+	b _080348A8\n\
+	.pool\n\
+_080348A0:\n\
+	mov r4, r9\n\
+	cmp r4, 0x5\n\
+	bne _080348A8\n\
+	adds r5, 0x60\n\
+_080348A8:\n\
+	mov r7, r8\n\
+	cmp r7, r9\n\
+	blt _0803481E\n\
+_080348AE:\n\
+	mov r0, r9\n\
+	cmp r0, 0x7\n\
+	bne _080348BC\n\
+	movs r1, 0x80\n\
+	lsls r1, 1\n\
+	adds r5, r1\n\
+	b _080348C8\n\
+_080348BC:\n\
+	mov r2, r9\n\
+	cmp r2, 0x5\n\
+	bne _080348C8\n\
+	movs r4, 0xF0\n\
+	lsls r4, 1\n\
+	adds r5, r4\n\
+_080348C8:\n\
+	ldr r0, [sp, 0x14]\n\
+	ldr r1, [sp]\n\
+	cmp r0, r1\n\
+	bge _080348D2\n\
+	b _08034756\n\
+_080348D2:\n\
+	b _08034964\n\
+_080348D4:\n\
+	movs r6, 0\n\
+	ldr r2, [sp]\n\
+	cmp r6, r2\n\
+	bge _08034964\n\
+_080348DC:\n\
+	adds r6, 0x1\n\
+	mov r10, r6\n\
+	mov r4, r9\n\
+	cmp r4, 0x6\n\
+	bne _080348F4\n\
+	movs r0, 0\n\
+	movs r3, 0xFF\n\
+_080348EA:\n\
+	strb r0, [r5]\n\
+	adds r5, 0x1\n\
+	subs r3, 0x1\n\
+	cmp r3, 0\n\
+	bge _080348EA\n\
+_080348F4:\n\
+	movs r7, 0\n\
+	cmp r7, r9\n\
+	bge _08034948\n\
+_080348FA:\n\
+	adds r7, 0x1\n\
+	mov r8, r7\n\
+	mov r1, r9\n\
+	lsls r0, r1, 5\n\
+	cmp r1, 0x6\n\
+	bne _08034914\n\
+	movs r1, 0\n\
+	movs r3, 0x1F\n\
+_0803490A:\n\
+	strb r1, [r5]\n\
+	adds r5, 0x1\n\
+	subs r3, 0x1\n\
+	cmp r3, 0\n\
+	bge _0803490A\n\
+_08034914:\n\
+	adds r1, r0, 0\n\
+	cmp r1, 0\n\
+	ble _0803492E\n\
+	adds r3, r1, 0\n\
+_0803491C:\n\
+	ldr r2, [sp, 0x4]\n\
+	ldrb r0, [r2]\n\
+	strb r0, [r5]\n\
+	adds r2, 0x1\n\
+	str r2, [sp, 0x4]\n\
+	adds r5, 0x1\n\
+	subs r3, 0x1\n\
+	cmp r3, 0\n\
+	bne _0803491C\n\
+_0803492E:\n\
+	mov r4, r9\n\
+	cmp r4, 0x6\n\
+	bne _08034942\n\
+	movs r0, 0\n\
+	movs r3, 0x1F\n\
+_08034938:\n\
+	strb r0, [r5]\n\
+	adds r5, 0x1\n\
+	subs r3, 0x1\n\
+	cmp r3, 0\n\
+	bge _08034938\n\
+_08034942:\n\
+	mov r7, r8\n\
+	cmp r7, r9\n\
+	blt _080348FA\n\
+_08034948:\n\
+	mov r0, r9\n\
+	cmp r0, 0x6\n\
+	bne _0803495C\n\
+	movs r0, 0\n\
+	movs r3, 0xFF\n\
+_08034952:\n\
+	strb r0, [r5]\n\
+	adds r5, 0x1\n\
+	subs r3, 0x1\n\
+	cmp r3, 0\n\
+	bge _08034952\n\
+_0803495C:\n\
+	mov r6, r10\n\
+	ldr r1, [sp]\n\
+	cmp r6, r1\n\
+	blt _080348DC\n\
+_08034964:\n\
+	add sp, 0x24\n\
+	pop {r3-r5}\n\
+	mov r8, r3\n\
+	mov r9, r4\n\
+	mov r10, r5\n\
+	pop {r4-r7}\n\
+	pop {r0}\n\
+	bx r0\n\
+        .syntax divided");
+}
+
+u32 sub_8034974(void* ptr)
+{
+    u8* ptr_ = (u8*)(ptr);
+    return (ptr_[3] << 16) | (ptr_[2] << 8) | (ptr_[1]);
+}
+
+bool8 LoadCompressedObjectPicUsingHeap(struct CompressedSpriteSheet* src)
+{
+    struct SpriteSheet dest;
+    void* buffer;
+
+    buffer = AllocZeroed(*((u32*)(&src->data[0])) >> 8);
+    LZ77UnCompWram(src->data, buffer);
+
+    dest.data = buffer;
+    dest.size = src->size;
+    dest.tag = src->tag;
+
+    LoadSpriteSheet(&dest);
+    Free(buffer);
+    return FALSE;
+}
+
+bool8 LoadCompressedObjectPaletteUsingHeap(const struct CompressedSpritePalette *src)
+{
+    struct SpritePalette dest;
+    void* buffer;
+
+    buffer = AllocZeroed(*((u32*)(&src->data[0])) >> 8);
+    LZ77UnCompWram(src->data, buffer);
+    dest.data = buffer;
+    dest.tag = src->tag;
+
+    LoadSpritePalette(&dest);
+    Free(buffer);
+    return FALSE;
+}
+
+void DecompressPicFromTable_2(const struct CompressedSpriteSheet *src, void* buffer, s32 species) // a copy of DecompressPicFromTable
+{
+    if (species > SPECIES_EGG)
+        LZ77UnCompWram(gMonFrontPicTable[0].data, buffer);
+    else
+        LZ77UnCompWram(src->data, buffer);
+    DuplicateDeoxysTiles(buffer, species);
+}
+
+void LoadSpecialPokePic_2(const struct CompressedSpriteSheet *src, void *dest, s32 species, u32 personality, bool8 isFrontPic) // a copy of LoadSpecialPokePic
+{
+    if (species == SPECIES_UNOWN)
+    {
+        u16 i = (((personality & 0x3000000) >> 18) | ((personality & 0x30000) >> 12) | ((personality & 0x300) >> 6) | (personality & 3)) % 0x1C;
+
+        // The other Unowns are separate from Unown A.
+        if (i == 0)
+            i = SPECIES_UNOWN;
+        else
+            i += SPECIES_UNOWN_B - 1;
+
+        if (!isFrontPic)
+            LZ77UnCompWram(gMonBackPicTable[i].data, dest);
+        else
+            LZ77UnCompWram(gMonFrontPicTable[i].data, dest);
+    }
+    else if (species > SPECIES_EGG) // is species unknown? draw the ? icon
+        LZ77UnCompWram(gMonFrontPicTable[0].data, dest);
+    else
+        LZ77UnCompWram(src->data, dest);
+
+    DuplicateDeoxysTiles(dest, species);
+    DrawSpindaSpots(species, personality, dest, isFrontPic);
+}
+
+void HandleLoadSpecialPokePic_2(const struct CompressedSpriteSheet *src, void *dest, s32 species, u32 personality) // a copy of HandleLoadSpecialPokePic
+{
+    bool8 isFrontPic;
+
+    if (src == &gMonFrontPicTable[species])
+        isFrontPic = TRUE; // frontPic
+    else
+        isFrontPic = FALSE; // backPic
+
+    LoadSpecialPokePic_2(src, dest, species, personality, isFrontPic);
+}
+
+void DecompressPicFromTable_DontHandleDeoxys(const struct CompressedSpriteSheet *src, void* buffer, s32 species) // a copy of DecompressPicFromTable
+{
+    if (species > SPECIES_EGG)
+        LZ77UnCompWram(gMonFrontPicTable[0].data, buffer);
+    else
+        LZ77UnCompWram(src->data, buffer);
+}
+
+void HandleLoadSpecialPokePic_DontHandleDeoxys(const struct CompressedSpriteSheet *src, void *dest, s32 species, u32 personality) // a copy of HandleLoadSpecialPokePic
+{
+    bool8 isFrontPic;
+
+    if (src == &gMonFrontPicTable[species])
+        isFrontPic = TRUE; // frontPic
+    else
+        isFrontPic = FALSE; // backPic
+
+    LoadSpecialPokePic_DontHandleDeoxys(src, dest, species, personality, isFrontPic);
+}
+
+void LoadSpecialPokePic_DontHandleDeoxys(const struct CompressedSpriteSheet *src, void *dest, s32 species, u32 personality, bool8 isFrontPic) // a copy of LoadSpecialPokePic
+{
+    if (species == SPECIES_UNOWN)
+    {
+        u16 i = (((personality & 0x3000000) >> 18) | ((personality & 0x30000) >> 12) | ((personality & 0x300) >> 6) | (personality & 3)) % 0x1C;
+
+        // The other Unowns are separate from Unown A.
+        if (i == 0)
+            i = SPECIES_UNOWN;
+        else
+            i += SPECIES_UNOWN_B - 1;
+
+        if (!isFrontPic)
+            LZ77UnCompWram(gMonBackPicTable[i].data, dest);
+        else
+            LZ77UnCompWram(gMonFrontPicTable[i].data, dest);
+    }
+    else if (species > SPECIES_EGG) // is species unknown? draw the ? icon
+        LZ77UnCompWram(gMonFrontPicTable[0].data, dest);
+    else
+        LZ77UnCompWram(src->data, dest);
+
+    DrawSpindaSpots(species, personality, dest, isFrontPic);
+}
+
+static void DuplicateDeoxysTiles(void *pointer, s32 species)
+{
+    if (species == SPECIES_DEOXYS)
+        CpuCopy32(pointer + 0x800, pointer, 0x800);
+}