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View topic - bmp2tile.exe fails to work with PNG file format

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  • Joined: 23 Aug 2005
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bmp2tile.exe fails to work with PNG file format
Post Posted: Wed Feb 12, 2020 4:33 pm
I'm testing out some tutorials from over at https://www.elotrolado.net/hilo_tutorial-muy-basico-de-c-para-master-system_2208...

I have my environment setup and wanted to pack some tile data so I copied the example png image into a 'gfx' folder, added bmp2tile to my path and added the following line to my batch script:

bmp2tile.exe ..\gfx\SegaMasterSystemTitleScreen.png -savetiles .\bank1\backgroundtiles.psgcompr -mirror -removedupes -savepalette .\bank1\backgroundpalette.bin -savetilemap .\bank1\backgroundtilemap.bin -exit


For some unknown reason, it just reports back that png is unsupported which seems like something incorrect to me. Has anyone had a similar issue and been able to resolve it?

Many thanks
format_not_supported.PNG (97.94 KB)
Format unsupported error
format_not_supported.PNG

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Post Posted: Wed Feb 12, 2020 6:42 pm
24bits ?
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Post Posted: Wed Feb 12, 2020 9:52 pm
ichigobankai wrote
24bits ?


Actually, I just saved the same image from the example website. It's 32 bit.
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Post Posted: Wed Feb 12, 2020 10:08 pm
Perhaps some de-optimization for the web. BMP2Tile expects you to manage the palette manually, ie to only give it images with 16 or fewer colours.
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Post Posted: Wed Feb 12, 2020 10:46 pm
Maxim wrote
Perhaps some de-optimization for the web. BMP2Tile expects you to manage the palette manually, ie to only give it images with 16 or fewer colours.


Ahh yeah, cool. Worked. I have no idea why a demo would provide an image that doesn't actually work :/ Well, I reduced the colours in Paint Shop Pro and it's now working fine. Cheers
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Post Posted: Thu Feb 13, 2020 9:36 am
Hi! Original tutorial author here!

I just downloaded the image I linked on the tutorial, and it has the right palette:


How have you downloaded it? Remember that you have to press open-download from the dropbox web interface otherwise, you're downloading the preview image that they're generating.

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Post Posted: Thu Feb 13, 2020 10:14 am
Side note: the newer rewrite of BMP2Tile is more command line friendly and may give a better error here.
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Post Posted: Thu Feb 13, 2020 8:44 pm
kusfo wrote
Hi! Original tutorial author here!

I just downloaded the image I linked on the tutorial, and it has the right palette:


How have you downloaded it? Remember that you have to press open-download from the dropbox web interface otherwise, you're downloading the preview image that they're generating.


I'm not sure, perhaps I just dragged the image and that was my problem. I guess that there is something that dropbox is doing to the preview image. It's working great now anyway and thanks for the rest of the tutorial which is great :)
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Post Posted: Thu Feb 13, 2020 9:42 pm
:)
Capture.PNG (176.55 KB)
Capture.PNG

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Post Posted: Fri Feb 14, 2020 7:19 am
It looks amazing! :-D
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Post Posted: Fri Feb 14, 2020 11:05 am
you don't even need to call
SMS_init()
as the crt0 code already does it for you :)

also, I'd load the palette, tiles and tilemap before turning screen on, unless you love the way it progressively appears on screen (barely noticeable, anyway)
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Post Posted: Sat Feb 15, 2020 9:38 am
sverx wrote
you don't even need to call
SMS_init()
as the crt0 code already does it for you :)

also, I'd load the palette, tiles and tilemap before turning screen on, unless you love the way it progressively appears on screen (barely noticeable, anyway)


Cheers for the advice. Actually, I had discovered that I can remove that line but added it back for completeness before I later go in an evaluate each function asm. Great points and I'm taking it all in and will edit according to your feedback :D -

kusfo Many thanks for your tutorial, it's a great resource. :)

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Post Posted: Sat Feb 15, 2020 2:44 pm
Great! :-D

The tutorial is a bit outdated, but I think it's quite a good starting point :-D
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Post Posted: Sat Feb 15, 2020 8:42 pm
kusfo wrote
Great! :-D

The tutorial is a bit outdated, but I think it's quite a good starting point :-D


I decided to attempt to convert a psg file https://www.smspower.org/Music/BatmanReturns-SMS

Stage 1.

I used vgm2psg with:
> vgm2psg batman.vgm music.psg 23

in an attempt to retrieve all channels? I then set up the PSG by calling both:

PSGPlay(music_psg);
PSGSFXPlay(music_psg, 0x01|0x02);

...

PSGFrame();
PSGSFXFrame();


However, I can clearly hear that there is a missing channel. I also tried with another track, Title Screen from Alien 3. That also seemed to be missing a channel. Any ideas why this might occur?
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Post Posted: Sat Feb 15, 2020 9:36 pm
to convert background music, you should NOT specify any channel on the command line, so you just need to do:
vgm2psg batman.vgm music.psg


then you need just PSGPlay and PSGFrame, not the SFX functions.
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Post Posted: Sat Feb 15, 2020 9:56 pm
sverx wrote
to convert background music, you should NOT specify any channel on the command line, so you just need to do:
vgm2psg batman.vgm music.psg


then you need just PSGPlay and PSGFrame, not the SFX functions.


Sorry, yeah, I was showing both options that I'd tried (I wasn't trying simultaniously), and I was sure that I tried your option first with Alien 3 title screen, but clearly I didn't since I just tried again and it's working perfectly for Batman. lol

Many thanks
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