1 files changed, 66 insertions, 0 deletions
diff --git a/src/pokedex_area_region_map.c b/src/pokedex_area_region_map.c
new file mode 100644
index 000000000..dfea9ea44
--- /dev/null
+++ b/src/pokedex_area_region_map.c
@@ -0,0 +1,66 @@
+#include "global.h"
+#include "main.h"
+#include "menu.h"
+#include "bg.h"
+#include "malloc.h"
+#include "palette.h"
+#include "pokedex_area_region_map.h"
+
+static EWRAM_DATA u8 *sPokedexAreaMapBgNum = NULL;
+
+static const u16 sPokedexAreaMap_Pal[] = INCBIN_U16("graphics/interface/region_map.gbapal");
+static const u32 sPokedexAreaMap_Gfx[] = INCBIN_U32("graphics/interface/region_map.8bpp.lz");
+static const u32 sPokedexAreaMap_Tilemap[] = INCBIN_U32("graphics/interface/region_map.bin.lz");
+static const u32 sPokedexAreaMapAffine_Gfx[] = INCBIN_U32("graphics/interface/region_map_affine.8bpp.lz");
+static const u32 sPokedexAreaMapAffine_Tilemap[] = INCBIN_U32("graphics/interface/region_map_affine.bin.lz");
+
+void LoadPokedexAreaMapGfx(const struct PokedexAreaMapTemplate *template)
+{
+    u8 mode;
+    sPokedexAreaMapBgNum = Alloc(4);
+    mode = template->mode;
+
+    if (mode == 0)
+    {
+        SetBgAttribute(template->bg, BG_ATTR_METRIC, 0);
+        decompress_and_copy_tile_data_to_vram(template->bg, sPokedexAreaMap_Gfx, 0, template->offset, 0);
+        sub_8199D3C(decompress_and_copy_tile_data_to_vram(template->bg, sPokedexAreaMap_Tilemap, 0, 0, 1), template->offset, 32, 32, FALSE);
+    }
+    else
+    {
+        SetBgAttribute(template->bg, BG_ATTR_METRIC, 2);
+        SetBgAttribute(template->bg, BG_ATTR_TYPE, 1);
+        decompress_and_copy_tile_data_to_vram(template->bg, sPokedexAreaMapAffine_Gfx, 0, template->offset, 0);
+        sub_8199D3C(decompress_and_copy_tile_data_to_vram(template->bg, sPokedexAreaMapAffine_Tilemap, 0, 0, 1), template->offset, 64, 64, TRUE);
+    }
+
+    ChangeBgX(template->bg, 0, 0);
+    ChangeBgY(template->bg, 0, 0);
+    SetBgAttribute(template->bg, BG_ATTR_PALETTEMODE, 1);
+    CpuCopy32(sPokedexAreaMap_Pal, &gPlttBufferUnfaded[0x70], 0x60);
+    *sPokedexAreaMapBgNum = template->bg;
+}
+
+bool32 sub_81C4E90(void)
+{
+    if (!free_temp_tile_data_buffers_if_possible())
+    {
+        ShowBg(*sPokedexAreaMapBgNum);
+        return FALSE;
+    }
+    else
+    {
+        return TRUE;
+    }
+}
+
+void FreePokedexAreaMapBgNum(void)
+{
+    if (sPokedexAreaMapBgNum != NULL)
+        FREE_AND_SET_NULL(sPokedexAreaMapBgNum);
+}
+
+void PokedexAreaMapChangeBgY(u32 a0)
+{
+    ChangeBgY(*sPokedexAreaMapBgNum, a0 * 0x100, 0);
+}