1 files changed, 102 insertions, 0 deletions
diff --git a/src/bg_palette_buffer.c b/src/bg_palette_buffer.c
new file mode 100644
index 0000000..5e078a0
--- /dev/null
+++ b/src/bg_palette_buffer.c
@@ -0,0 +1,102 @@
+#include "global.h"
+
+extern u16 gBGPaletteBuffer[512];
+extern bool8 gBGPaletteUsed[32];
+
+extern void CpuCopy(void* src, void* dest, u32 size);
+
+/*
+void InitBGPaletteBuffer(void)
+{
+    u16 color = 0;
+    u16* ptr;
+    u32 i;
+    bool8 paletteUsed;
+
+    u8* p;
+
+    ptr = gUnknown_20251F0;
+
+    i = 0x80;
+    i <<= 2;
+
+    do {
+        *ptr++ = color;
+        i--;
+    } while (i);
+
+    paletteUsed = TRUE;
+
+    p = gUnknown_20251D0;
+    p += 31;
+
+    do
+        *p-- = paletteUsed;
+    while ((s32) p >= (s32) &gUnknown_20251D0);
+}
+void SetBGPaletteBufferColorRGB(s32 index, u8 *RGBArray, s32 a3, u8 *a4)
+{
+    if (a3 < 0) {
+        a3 = 0;
+    }
+    if (a3 > 31) {
+        a3 = 31;
+    }
+    gBGPaletteUsed[index / 16] = 1;
+    if (!a4) {
+        gBGPaletteBuffer[index] = ((RGBArray[2] * a3 / 256 & 0x1F) << 10) | ((RGBArray[1] * a3 / 256 & 0x1F) << 5) | (RGBArray[0] * a3 / 256 & 0x1F);
+    }
+    else
+    {
+        gBGPaletteBuffer[index] = ((a4[4 * RGBArray[2] + 2] * a3 / 256 & 0x1F) << 10) | ((a4[4 * RGBArray[1] + 1] * a3 / 256 & 0x1F) << 5) | (a4[4 * RGBArray[0]] * a3 / 256 & 0x1F);
+    }
+}
+*/
+
+void SetBGPaletteBufferColorArray(s32 index, u8 *colorArray)
+{
+    gBGPaletteUsed[index / 16] = TRUE;
+    gBGPaletteBuffer[index] = (colorArray[2] >> 3) << 10 | (colorArray[1] >> 3) << 5 | colorArray[0] >> 3;
+}
+
+void SetBGPaletteBufferColor(s32 index, u16 *color)
+{
+    gBGPaletteUsed[index / 16] = TRUE;
+    gBGPaletteBuffer[index] = *color;
+}
+
+void nullsub_4()
+{
+
+}
+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 < 512 );
+}
+\ No newline at end of file