1 files changed, 46 insertions, 0 deletions
diff --git a/src/blend_palette.c b/src/blend_palette.c
new file mode 100644
index 000000000..8cd65ae4b
--- /dev/null
+++ b/src/blend_palette.c
@@ -0,0 +1,46 @@
+#include "global.h"
+#include "blend_palette.h"
+#include "palette.h"
+
+void BlendPalette(u16 palOffset, u16 numEntries, u8 coeff, u16 blendColor)
+{
+    u16 i;
+    for (i = 0; i < numEntries; i++)
+    {
+        u16 index = i + palOffset;
+        struct PlttData *data1 = (struct PlttData *)&gPlttBufferUnfaded[index];
+        s8 r = data1->r;
+        s8 g = data1->g;
+        s8 b = data1->b;
+        struct PlttData *data2 = (struct PlttData *)&blendColor;
+        gPlttBufferFaded[index] = ((r + (((data2->r - r) * coeff) >> 4)) << 0)
+                                | ((g + (((data2->g - g) * coeff) >> 4)) << 5)
+                                | ((b + (((data2->b - b) * coeff) >> 4)) << 10);
+    }
+}
+
+void sub_8045314(u16 * palbuff, u16 blend_pal, u32 coefficient, s32 size)
+{
+    if (coefficient == 16)
+    {
+        while (--size != -1)
+        {
+            *palbuff++ = blend_pal;
+        }
+    }
+    else
+    {
+        u16 r = (blend_pal >>  0) & 0x1F;
+        u16 g = (blend_pal >>  5) & 0x1F;
+        u16 b = (blend_pal >> 10) & 0x1F;
+        while (--size != -1)
+        {
+            u16 r2 = (*palbuff >>  0) & 0x1F;
+            u16 g2 = (*palbuff >>  5) & 0x1F;
+            u16 b2 = (*palbuff >> 10) & 0x1F;
+            *palbuff++ = ((r2 + (((r - r2) * coefficient) >> 4)) <<  0)
+                       | ((g2 + (((g - g2) * coefficient) >> 4)) <<  5)
+                       | ((b2 + (((b - b2) * coefficient) >> 4)) << 10);
+        }
+    }
+}