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#include "global.h"
#define BG_PALETTE_BUFFER_SIZE 512
#define BG_PALETTE_BUFFER_CHUNK_SIZE 16
EWRAM_DATA u16 gBGPaletteBuffer[BG_PALETTE_BUFFER_SIZE];
EWRAM_DATA bool8 gBGPaletteUsed[BG_PALETTE_BUFFER_SIZE / BG_PALETTE_BUFFER_CHUNK_SIZE];
extern void CpuCopy(void* src, void* dest, u32 size);
#ifndef NONMATCHING
NAKED
#endif
void InitBGPaletteBuffer(void)
{
#ifdef NONMATCHING
u16 color = 0;
u16* ptr;
u32 i;
bool8 paletteUsed;
u8* p;
ptr = gBGPaletteBuffer;
i = 0x80;
i <<= 2;
do {
*ptr++ = color;
i--;
} while (i);
paletteUsed = TRUE;
p = gBGPaletteUsed;
p += 31;
do
*p-- = paletteUsed;
while ((s32) p >= (s32) &gBGPaletteUsed);
#else
asm_unified("\tpush {lr}\n"
"\tmovs r2, 0\n"
"\tldr r1, =gBGPaletteBuffer\n"
"\tmovs r0, 0x80\n"
"\tlsls r0, 2\n"
"_0800463E:\n"
"\tstrh r2, [r1]\n"
"\tadds r1, 0x2\n"
"\tsubs r0, 0x1\n"
"\tcmp r0, 0\n"
"\tbne _0800463E\n"
"\tldr r1, =gBGPaletteUsed\n"
"\tmovs r2, 0x1\n"
"\tadds r0, r1, 0\n"
"\tadds r0, 0x1F\n"
"_08004650:\n"
"\tstrb r2, [r0]\n"
"\tsubs r0, 0x1\n"
"\tcmp r0, r1\n"
"\tbge _08004650\n"
"\tpop {r0}\n"
"\tbx r0\n"
"\t.align 2, 0\n"
"\t.pool");
#endif
}
#ifndef NONMATCHING
NAKED
#endif
void SetBGPaletteBufferColorRGB(s32 index, u8 *RGBArray, s32 a1, u8 *a2)
{
#ifdef NONMATCHING
if (a1 < 0) {
a1 = 0;
}
if (a1 > 31) {
a1 = 31;
}
gBGPaletteUsed[index / 16] = 1;
if (!a2) {
gBGPaletteBuffer[index] = ((RGBArray[2] * a1 / 256 & 0x1F) << 10) | ((RGBArray[1] * a1 / 256 & 0x1F) << 5) | (RGBArray[0] * a1 / 256 & 0x1F);
}
else
{
gBGPaletteBuffer[index] = ((a2[4 * RGBArray[2] + 2] * a1 / 256 & 0x1F) << 10) | ((a2[4 * RGBArray[1] + 1] * a1 / 256 & 0x1F) << 5) | (a2[4 * RGBArray[0]] * a1 / 256 & 0x1F);
}
#else
asm_unified("\tpush {r4-r7,lr}\n"
"\tadds r4, r0, 0\n"
"\tadds r5, r1, 0\n"
"\tcmp r2, 0\n"
"\tbge _08004670\n"
"\tmovs r2, 0\n"
"_08004670:\n"
"\tcmp r2, 0x1F\n"
"\tble _08004676\n"
"\tmovs r2, 0x1F\n"
"_08004676:\n"
"\tldr r1, =gBGPaletteUsed\n"
"\tadds r0, r4, 0\n"
"\tcmp r4, 0\n"
"\tbge _08004680\n"
"\tadds r0, 0xF\n"
"_08004680:\n"
"\tasrs r0, 4\n"
"\tadds r0, r1\n"
"\tmovs r1, 0x1\n"
"\tstrb r1, [r0]\n"
"\tcmp r3, 0\n"
"\tbne _080046D4\n"
"\tldr r0, =gBGPaletteBuffer\n"
"\tlsls r1, r4, 1\n"
"\tadds r6, r1, r0\n"
"\tldrb r0, [r5, 0x2]\n"
"\tmuls r0, r2\n"
"\tcmp r0, 0\n"
"\tbge _0800469C\n"
"\tadds r0, 0xFF\n"
"_0800469C:\n"
"\tasrs r0, 8\n"
"\tmovs r3, 0x1F\n"
"\tands r0, r3\n"
"\tlsls r4, r0, 10\n"
"\tldrb r0, [r5, 0x1]\n"
"\tmuls r0, r2\n"
"\tcmp r0, 0\n"
"\tbge _080046AE\n"
"\tadds r0, 0xFF\n"
"_080046AE:\n"
"\tasrs r0, 8\n"
"\tands r0, r3\n"
"\tlsls r1, r0, 5\n"
"\torrs r1, r4\n"
"\tldrb r0, [r5]\n"
"\tmuls r0, r2\n"
"\tcmp r0, 0\n"
"\tbge _080046C0\n"
"\tadds r0, 0xFF\n"
"_080046C0:\n"
"\tasrs r0, 8\n"
"\tands r0, r3\n"
"\torrs r1, r0\n"
"\tstrh r1, [r6]\n"
"\tb _08004722\n"
"\t.align 2, 0\n"
"\t.pool\n"
"_080046D4:\n"
"\tldr r1, =gBGPaletteBuffer\n"
"\tlsls r0, r4, 1\n"
"\tadds r7, r0, r1\n"
"\tldrb r0, [r5, 0x2]\n"
"\tlsls r0, 2\n"
"\tadds r0, r3\n"
"\tldrb r0, [r0, 0x2]\n"
"\tmuls r0, r2\n"
"\tcmp r0, 0\n"
"\tbge _080046EA\n"
"\tadds r0, 0xFF\n"
"_080046EA:\n"
"\tasrs r0, 8\n"
"\tmovs r4, 0x1F\n"
"\tands r0, r4\n"
"\tlsls r6, r0, 10\n"
"\tldrb r0, [r5, 0x1]\n"
"\tlsls r0, 2\n"
"\tadds r0, r3\n"
"\tldrb r0, [r0, 0x1]\n"
"\tmuls r0, r2\n"
"\tcmp r0, 0\n"
"\tbge _08004702\n"
"\tadds r0, 0xFF\n"
"_08004702:\n"
"\tasrs r0, 8\n"
"\tands r0, r4\n"
"\tlsls r1, r0, 5\n"
"\torrs r1, r6\n"
"\tldrb r0, [r5]\n"
"\tlsls r0, 2\n"
"\tadds r0, r3\n"
"\tldrb r0, [r0]\n"
"\tmuls r0, r2\n"
"\tcmp r0, 0\n"
"\tbge _0800471A\n"
"\tadds r0, 0xFF\n"
"_0800471A:\n"
"\tasrs r0, 8\n"
"\tands r0, r4\n"
"\torrs r1, r0\n"
"\tstrh r1, [r7]\n"
"_08004722:\n"
"\tpop {r4-r7}\n"
"\tpop {r0}\n"
"\tbx r0\n"
"\t.align 2, 0\n"
"\t.pool");
#endif
}
void SetBGPaletteBufferColorArray(s32 index, u8 *colorArray)
{
gBGPaletteUsed[index / BG_PALETTE_BUFFER_CHUNK_SIZE] = TRUE;
gBGPaletteBuffer[index] = (colorArray[2] >> 3) << 10 | (colorArray[1] >> 3) << 5 | colorArray[0] >> 3;
}
void SetBGPaletteBufferColor(s32 index, u16 *color)
{
gBGPaletteUsed[index / BG_PALETTE_BUFFER_CHUNK_SIZE] = TRUE;
gBGPaletteBuffer[index] = *color;
}
void nullsub_4(void)
{
}
void nullsub_5(void)
{
}
void nullsub_143(void)
{
}
void TransferBGPaletteBuffer(void)
{
u32 i;
s32 paletteBufferIndex;
u16 *dest;
i = 0;
paletteBufferIndex = 0;
dest = (u16 *)PLTT;
do
{
if (gBGPaletteUsed[i])
{
gBGPaletteUsed[i] = 0;
CpuCopy(dest, &gBGPaletteBuffer[paletteBufferIndex], sizeof(u16) * 16);
}
++i;
dest += 16;
paletteBufferIndex += 16;
}
while ( paletteBufferIndex < BG_PALETTE_BUFFER_SIZE );
}
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