diff options
Diffstat (limited to 'src/bg_palette_buffer.c')
| -rw-r--r-- | src/bg_palette_buffer.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/src/bg_palette_buffer.c b/src/bg_palette_buffer.c new file mode 100644 index 0000000..9917adf --- /dev/null +++ b/src/bg_palette_buffer.c @@ -0,0 +1,248 @@ +#include "global.h" + +#define BG_PALETTE_BUFFER_SIZE 512 +#define BG_PALETTE_BUFFER_CHUNK_SIZE 16 + +extern u16 gBGPaletteBuffer[BG_PALETTE_BUFFER_SIZE]; +extern 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 ); +} |