From 5fbb11313b204e781f30b25b40701f5b12bd64a1 Mon Sep 17 00:00:00 2001
From: DizzyEggg <jajkodizzy@wp.pl>
Date: Sat, 3 Aug 2019 20:10:28 +0200
Subject: [PATCH] Fakematch sub_819A080

Really wanted to match this one, but it just doesn't cooperate, oh well
---
 src/menu.c | 356 ++++++++---------------------------------------------
 1 file changed, 51 insertions(+), 305 deletions(-)

diff --git a/src/menu.c b/src/menu.c
index 354346d27..8d50d4dcc 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -1,6 +1,7 @@
 #include "global.h"
 #include "alloc.h"
 #include "bg.h"
+#include "blit.h"
 #include "dma3.h"
 #include "event_data.h"
 #include "graphics.h"
@@ -2013,337 +2014,82 @@ void PrintPlayerNameOnWindow(u8 windowId, const u8 *src, u16 x, u16 y)
     AddTextPrinterParameterized(windowId, 1, gStringVar4, x, y, 0xFF, 0);
 }
 
-//Screw this function, it's long and unreferenced and ugh
-
-struct UnkStruct_819A080 {
-    u8 *unk00;
-    u16 unk04;
-    u16 unk06;
-};
-
-#ifdef NONMATCHING
-void sub_819A080(struct UnkStruct_819A080 *a0, struct UnkStruct_819A080 *a1, u16 a2, u16 a3, u16 a4, u16 a5, u16 a6, u16 a7)
+// Unused. Similar to BlitBitmapRect4Bit.
+void sub_819A080(const struct Bitmap *src, struct Bitmap *dst, u16 srcX, u16 srcY, u16 dstX, u16 dstY, u16 width, u16 height)
 {
-    // r3 = a3
-    // r4 = a5
-    // r1 = a6
-    // r5 = a7
-    // sp+00 = a0
-    // sp+04 = a1
-    // sp+08 = a2
-    // sp+0c = a4
-    int sp10 = a1->unk04 - a4 < a6 ? a1->unk04 - a4 + a2 : a6 + a2;
-    int sp14 = a0->unk06 - a5 < a7 ? a3 + a0->unk06 - a5 : a3 + a7;
-    int sp18 = (a0->unk04 + (a0->unk04 & 0x7)) / 8;
-    int sp1c = (a1->unk04 + (a1->unk04 & 0x7)) / 8;
-    int r12; // sp+20
-    int r8;  // sp+24
-    int r5;
-    int r6;
-    u16 r2;
+    int loopSrcY, loopDstY, loopSrcX, loopDstX, xEnd, yEnd, multiplierSrcY, multiplierDstY;
+    const u8 *pixelsSrc;
+    u16 *pixelsDst;
+    u16 toOrr;
 
-    for (r12 = a3, r8 = a5; r12 < sp14; r12++, r8++)
+    if (dst->width - dstX < width)
+        xEnd = dst->width - dstX + srcX;
+    else
+        xEnd = width + srcX;
+
+    if (dst->height - dstY < height)
+        yEnd = srcY + dst->height - dstY;
+    else
+        yEnd = srcY + height;
+
+    multiplierSrcY = (src->width + (src->width & 7)) >> 3;
+    multiplierDstY = (dst->width + (dst->width & 7)) >> 3;
+
+    for (loopSrcY = srcY, loopDstY = dstY; loopSrcY < yEnd; loopSrcY++, loopDstY++)
     {
-        for (r5 = a2, r6 = a4; a5 < sp10; a5++, a6++)
+        for (loopSrcX = srcX, loopDstX = dstX; loopSrcX < xEnd; loopSrcX++, loopDstX++)
         {
-            u8 *r3 = a0->unk00 + ((r5 >> 1) & 0x3) + ((r5 >> 3) << 5) + (((r12 >> 3) * sp18) << 5) + ((r12 & 0x7) << 2);
-            u8 *r4 = a1->unk00 + ((r6 >> 1) & 0x3) + ((r6 >> 3) << 5) + (((r8 >> 3) * sp1c) << 5) + ((r8 & 0x7) << 2);
-            if (((uintptr_t)r4) & 0x1)
+            pixelsSrc = src->pixels + ((loopSrcX >> 1) & 3) + ((loopSrcX >> 3) << 5) + (((loopSrcY >> 3) * multiplierSrcY) << 5) + ((u32)(loopSrcY << 0x1d) >> 0x1B);
+            pixelsDst = (void*) dst->pixels + ((loopDstX >> 1) & 3) + ((loopDstX >> 3) << 5) + ((( loopDstY >> 3) * multiplierDstY) << 5) + ((u32)( loopDstY << 0x1d) >> 0x1B);
+
+            if ((uintptr_t )pixelsDst & 0x1)
             {
-                u16 *r4_2 = (u16 *)(r4 - 1);
-                if (r6 & 0x1)
+                pixelsDst = (void*)(pixelsDst) - 1;
+                if (loopDstX & 0x1)
                 {
-                    r2 = *r4_2 & 0x0fff;
-                    if (r5 & 0x1)
-                        *r4_2 = r2 | ((*r3 & 0xf0) << 8);
+                    toOrr = *pixelsDst & 0x0fff;
+                    if (loopSrcX & 0x1)
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0xf0) << 8);
                     else
-                        *r4_2 = r2 | ((*r3 & 0x0f) << 12);
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0x0f) << 12);
                 }
                 else
                 {
-                    r2 = *r4_2 * 0xf0ff;
-                    if (r5 & 0x1)
-                        *r4_2 = r2 | ((*r3 & 0xf0) << 4);
+                    toOrr = *pixelsDst & 0xf0ff;
+                    if (loopSrcX & 0x1)
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0xf0) << 4);
                     else
-                        *r4_2 = r2 | ((*r3 & 0x0f) << 8);
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0x0f) << 8);
                 }
             }
             else
             {
-                u16 *r4_2 = (u16 *)r4;
-                if (r6 & 1)
+                if (loopDstX & 1)
                 {
-                    r2 = *r4_2 & 0xff0f;
-                    if (r5 & 1)
-                        *r4_2 = r2 | ((*r3 & 0xf0) << 0);
+                    toOrr = *pixelsDst & 0xff0f;
+                    if (loopSrcX & 1)
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0xf0) << 0);
                     else
-                        *r4_2 = r2 | ((*r3 & 0x0f) << 4);
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0x0f) << 4);
                 }
                 else
                 {
-                    r2 = *r4_2 & 0xfff0;
-                    if (r5 & 1)
-                        *r4_2 = r2 | ((*r3 & 0xf0) >> 4);
+                    toOrr = *pixelsDst & 0xfff0;
+                    if (loopSrcX & 1)
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0xf0) >> 4);
                     else
-                        *r4_2 = r2 | ((*r3 & 0x0f) >> 0);
+                        *pixelsDst = toOrr | ((*pixelsSrc & 0x0f) >> 0);
                 }
             }
+
+            // Needed to match, urgh.
+            #ifndef NONMATCHING
+            asm("":::"r4");
+            pixelsDst++;pixelsDst--;
+            #endif // NONMATCHING
         }
     }
 }
-#else
-NAKED
-void sub_819A080(struct UnkStruct_819A080 *a0, struct UnkStruct_819A080 *a1, u16 a2, u16 a3, u16 a4, u16 a5, u16 a6, u16 a7)
-{
-    asm("push {r4-r7,lr}\n\
-    mov r7, r10\n\
-    mov r6, r9\n\
-    mov r5, r8\n\
-    push {r5-r7}\n\
-    sub sp, #0x28\n\
-    str r0, [sp]\n\
-    str r1, [sp, #0x4]\n\
-    ldr r0, [sp, #0x48]\n\
-    ldr r4, [sp, #0x4C]\n\
-    ldr r1, [sp, #0x50]\n\
-    ldr r5, [sp, #0x54]\n\
-    lsl r2, #16\n\
-    lsr r2, #16\n\
-    str r2, [sp, #0x8]\n\
-    lsl r3, #16\n\
-    lsr r3, #16\n\
-    lsl r0, #16\n\
-    lsr r0, #16\n\
-    str r0, [sp, #0xC]\n\
-    lsl r4, #16\n\
-    lsr r4, #16\n\
-    lsl r1, #16\n\
-    lsr r1, #16\n\
-    lsl r5, #16\n\
-    lsr r5, #16\n\
-    ldr r2, [sp, #0x4]\n\
-    ldrh r0, [r2, #0x4]\n\
-    ldr r2, [sp, #0xC]\n\
-    sub r0, r2\n\
-    ldr r2, [sp, #0x8]\n\
-    add r2, r1, r2\n\
-    str r2, [sp, #0x10]\n\
-    cmp r0, r1\n\
-    bge _0819A0CC\n\
-    ldr r1, [sp, #0x8]\n\
-    add r0, r1\n\
-    str r0, [sp, #0x10]\n\
-_0819A0CC:\n\
-    ldr r2, [sp, #0x4]\n\
-    ldrh r1, [r2, #0x6]\n\
-    sub r0, r1, r4\n\
-    cmp r0, r5\n\
-    bge _0819A0DE\n\
-    add r0, r3, r1\n\
-    sub r0, r4\n\
-    str r0, [sp, #0x14]\n\
-    b _0819A0E2\n\
-_0819A0DE:\n\
-    add r5, r3, r5\n\
-    str r5, [sp, #0x14]\n\
-_0819A0E2:\n\
-    ldr r0, [sp]\n\
-    ldrh r1, [r0, #0x4]\n\
-    mov r2, #0x7\n\
-    add r0, r1, #0\n\
-    and r0, r2\n\
-    add r1, r0\n\
-    asr r1, #3\n\
-    str r1, [sp, #0x18]\n\
-    ldr r0, [sp, #0x4]\n\
-    ldrh r1, [r0, #0x4]\n\
-    add r0, r1, #0\n\
-    and r0, r2\n\
-    add r1, r0\n\
-    asr r1, #3\n\
-    str r1, [sp, #0x1C]\n\
-    mov r12, r3\n\
-    mov r8, r4\n\
-    ldr r1, [sp, #0x14]\n\
-    cmp r12, r1\n\
-    blt _0819A10C\n\
-    b _0819A24A\n\
-_0819A10C:\n\
-    ldr r5, [sp, #0x8]\n\
-    ldr r6, [sp, #0xC]\n\
-    mov r2, r12\n\
-    add r2, #0x1\n\
-    str r2, [sp, #0x20]\n\
-    mov r0, r8\n\
-    add r0, #0x1\n\
-    str r0, [sp, #0x24]\n\
-    ldr r1, [sp, #0x10]\n\
-    cmp r5, r1\n\
-    blt _0819A124\n\
-    b _0819A23A\n\
-_0819A124:\n\
-    mov r7, #0x1\n\
-    mov r2, #0xF0\n\
-    mov r10, r2\n\
-    mov r0, #0xF\n\
-    mov r9, r0\n\
-_0819A12E:\n\
-    asr r0, r5, #1\n\
-    mov r1, #0x3\n\
-    and r0, r1\n\
-    ldr r2, [sp]\n\
-    ldr r1, [r2]\n\
-    add r1, r0\n\
-    asr r0, r5, #3\n\
-    lsl r0, #5\n\
-    add r1, r0\n\
-    mov r2, r12\n\
-    asr r0, r2, #3\n\
-    ldr r2, [sp, #0x18]\n\
-    mul r0, r2\n\
-    lsl r0, #5\n\
-    add r1, r0\n\
-    mov r2, r12\n\
-    lsl r0, r2, #29\n\
-    lsr r0, #27\n\
-    add r3, r1, r0\n\
-    asr r0, r6, #1\n\
-    mov r1, #0x3\n\
-    and r0, r1\n\
-    ldr r2, [sp, #0x4]\n\
-    ldr r1, [r2]\n\
-    add r1, r0\n\
-    asr r0, r6, #3\n\
-    lsl r0, #5\n\
-    add r1, r0\n\
-    mov r2, r8\n\
-    asr r0, r2, #3\n\
-    ldr r2, [sp, #0x1C]\n\
-    mul r0, r2\n\
-    lsl r0, #5\n\
-    add r1, r0\n\
-    mov r2, r8\n\
-    lsl r0, r2, #29\n\
-    lsr r0, #27\n\
-    add r4, r1, r0\n\
-    add r0, r4, #0\n\
-    and r0, r7\n\
-    cmp r0, #0\n\
-    beq _0819A1DA\n\
-    sub r4, #0x1\n\
-    add r0, r6, #0\n\
-    and r0, r7\n\
-    cmp r0, #0\n\
-    beq _0819A1B2\n\
-    ldrh r0, [r4]\n\
-    ldr r2, =0x00000fff\n\
-    and r2, r0\n\
-    add r0, r5, #0\n\
-    and r0, r7\n\
-    cmp r0, #0\n\
-    beq _0819A1A8\n\
-    ldrb r1, [r3]\n\
-    mov r0, r10\n\
-    and r0, r1\n\
-    lsl r0, #8\n\
-    b _0819A22A\n\
-    .pool\n\
-_0819A1A8:\n\
-    ldrb r1, [r3]\n\
-    mov r0, r9\n\
-    and r0, r1\n\
-    lsl r0, #12\n\
-    b _0819A22A\n\
-_0819A1B2:\n\
-    ldrh r0, [r4]\n\
-    ldr r2, =0x0000f0ff\n\
-    and r2, r0\n\
-    add r0, r5, #0\n\
-    and r0, r7\n\
-    cmp r0, #0\n\
-    beq _0819A1D0\n\
-    ldrb r1, [r3]\n\
-    mov r0, r10\n\
-    and r0, r1\n\
-    lsl r0, #4\n\
-    b _0819A22A\n\
-    .pool\n\
-_0819A1D0:\n\
-    ldrb r1, [r3]\n\
-    mov r0, r9\n\
-    and r0, r1\n\
-    lsl r0, #8\n\
-    b _0819A22A\n\
-_0819A1DA:\n\
-    add r0, r6, #0\n\
-    and r0, r7\n\
-    cmp r0, #0\n\
-    beq _0819A206\n\
-    ldrh r0, [r4]\n\
-    ldr r2, =0x0000ff0f\n\
-    and r2, r0\n\
-    add r0, r5, #0\n\
-    and r0, r7\n\
-    cmp r0, #0\n\
-    beq _0819A1FC\n\
-    ldrb r1, [r3]\n\
-    mov r0, r10\n\
-    b _0819A228\n\
-    .pool\n\
-_0819A1FC:\n\
-    ldrb r1, [r3]\n\
-    mov r0, r9\n\
-    and r0, r1\n\
-    lsl r0, #4\n\
-    b _0819A22A\n\
-_0819A206:\n\
-    ldrh r0, [r4]\n\
-    ldr r2, =0x0000fff0\n\
-    and r2, r0\n\
-    add r0, r5, #0\n\
-    and r0, r7\n\
-    cmp r0, #0\n\
-    beq _0819A224\n\
-    ldrb r1, [r3]\n\
-    mov r0, r10\n\
-    and r0, r1\n\
-    lsr r0, #4\n\
-    b _0819A22A\n\
-    .pool\n\
-_0819A224:\n\
-    ldrb r1, [r3]\n\
-    mov r0, r9\n\
-_0819A228:\n\
-    and r0, r1\n\
-_0819A22A:\n\
-    orr r2, r0\n\
-    strh r2, [r4]\n\
-    add r5, #0x1\n\
-    add r6, #0x1\n\
-    ldr r0, [sp, #0x10]\n\
-    cmp r5, r0\n\
-    bge _0819A23A\n\
-    b _0819A12E\n\
-_0819A23A:\n\
-    ldr r1, [sp, #0x20]\n\
-    mov r12, r1\n\
-    ldr r2, [sp, #0x24]\n\
-    mov r8, r2\n\
-    ldr r0, [sp, #0x14]\n\
-    cmp r12, r0\n\
-    bge _0819A24A\n\
-    b _0819A10C\n\
-_0819A24A:\n\
-    add sp, #0x28\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");
-}
-#endif
 
 void sub_819A25C(u8 palOffset, u16 speciesId)
 {