[Graphic✓] Separate one 64x64 picture into two 64x32 parts and make it combined & display?

[セケツ]

Hello Everyone.
In pokeemerald, it's known to us that the the "emerald version" banner displayed in the title screen is a combination of two 64×32 parts that come from one 64×64 image.
Well, since I have had plugged the namebox feature into my hack. I found that the namebox was a little bit narrow to fit some names of the characters. So I changed the number of texts display in the textprinter, and made a 80x32 new namebox picture to insert into the ROM (The original one in that feature is a 64×32 file).
But when I insert it, a problem came that I could't make it display properly at all. I checked the ROM files and found that the Oamdata in pokeemerald have no support in displaying 80x32 sprites.

Having looked through the "title-screen.c" file, I found a possible solution for it: separate the 80×32 sprite into a 64×32 file and a 16×32 file, putting them together in a 64x64 picture, and finally setting the Oamdata properly to make it display in the ROM. Just like the version banner did in the titlescreen. But It's a shame that I knew nothing about how to set it up.
Could someone help me with this problem? Thanks again for any assistance.

 

[セケツ]

Well, I finally figure it out after some shallow & simple researches on the sprite-displaying codes. It really took some time due to my ignorance...
Here is my "a little bit silly" solution below. Moreover, since my English might be unclear, I will also post some images helping to show it clearly.

Firstly, I looked up the "field_name_box.c" file, copied a share of the codes which constructed the Oamdata, the Spriteanim & the SpriteTemplate of the 64x32 namebox itself, and modified the "namebox" strings in them to "namebox2" for the sake of distinguishing from the original.
("sOam_namebox" to "sOam_namebox2" for instance, as the picture below)

Spoiler:

Secondly, I did some changes below in the strings at the top of the file, which gave definitions to the tile tag.

Spoiler:

Thirdly, I looked below to the spritesheet part, and doubled the value that control the size of the tilemap of the namebox.
(Just double it...)

Spoiler:

Fourthly, I went to check out the code I had copied in the initial step, and changed the values about "SpriteAnimnamebox2" as the pictures below.

Spoiler:

Since the namebox itself is a 4bpp file, I made it (32,0), if it's a 8bpp file, it would be doubled to (64,0).
(I guess it by looking through the "title_screen.c" file, it may be wrong, sorry.)
After that, I jumped to the loading part, moved the string controlling the loading of the sprite tile & pallette to the "LoadNameboxtilemap" part.

Spoiler:

Finally, I added a new SpriteId & loading function for the second part of the namebox. Just by copying the original & making few adjustments on the values, Parameters & related functions, then defining it at the top. What's more, I also made some adjustments in the display & clear tasks, which also include or have relationships with them.

Spoiler:

That's how I completed it. In addition, since the namebox still can't print as many letters as I want (Only 6), I also expanded the width of it, and then went to "menu.c" file, making a change of the VRAM data for the original textbox, through the method provided in "Simple modifications Directory". so LUCKILY make it succeed in making it display properly.

Spoiler:

Here is the result screen, Now not only could I make the full name (more than 6 letters) of my character displayed, but also have more free space to make a small face-avatar displayed in the namebox.
(I made it through the mugshot method, which also comes from the "Simple modifications Directory" thread.)

However, although this question was "solved", I still wonder whether there would be some problems and bugs. Also, if anyone knows the methods that are more proper, clear & simple, Please tell me about it.
Thanks everyone here again.