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kecC
Joined: 04 Jul 2005
Posts: 17
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 Posted: Fri Sep 02, 2005 10:14 pm Post subject: Problem showing images (UPDATED, please check it) |
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Hi:
I'm developing a simple program, and i want to put a background image. I have the image in .c, and i know to show it in the display, but my problem is that the background colors aren't the same compared with the real image. There are color like orange, red and yellow.
What can I do?
Thanks!
Bye.
Edit: http://www.megaupload.com/?d=011A728B
I put this file with:
- The original image
- The EBOOT.PBP
- main.c
- foto.c
- Makefile
I have been thinking and I think that maybe, I could be that the photo is 24bit. |
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kecC
Joined: 04 Jul 2005
Posts: 17
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| Posted: Tue Sep 06, 2005 11:58 am Post subject: |
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| nobody can help me? |
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skeezixcodejedi
Joined: 30 Aug 2005
Posts: 29
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| Posted: Tue Sep 06, 2005 12:40 pm Post subject: |
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I didn't look at your code..
The image is showing up correctly, just the wrong colours?
Are you loading and parsing the palette correctly? Are you using the same palette depth as you're showing?
ie: If you're in a 444-4 type display mode (4bits for each component), then you just can't get the same colour accuracy as in a higher colour image; and if you load such an image and don't mask the palette bits right, it'd go all to hell when you shift them into a 16-bit colour value.. (depending how you determine your 16bit value, say.)
So without looking at your code, I wonder.. did you correctly parse the palette into the format needed by your display settings?
jeff
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Have you played Atari today? |
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hexperience
Joined: 05 Jul 2005
Posts: 19
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| Posted: Tue Sep 06, 2005 2:33 pm Post subject: |
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Here are the functions I made to convert a 16bit image to a 32bit image. It's extreamly newbie code, but it was how I played around with it.
There are a couple of good threads that explain the 16 and 32bit display modes. http://forums.ps2dev.org/viewtopic.php?t=2899
| Code: | // Take a pixel in 16bit color format and convert it to 32bit color format
// Does not include the alpha bit
unsigned int pixel_16to32(unsigned int sourceColor)
{
unsigned int destColor;
int r, g, b;
b = (sourceColor&0x7C00)>>10 ;
g = (sourceColor&0x03E0)>>5 ;
r = (sourceColor&0x001F) ;
destColor = ((b&0x1F)<<19)|((g&0x1F)<<11)|((r&0x1F)<<3) ;
return destColor;
}
// Take the image in mypic.c which is in the array gfxconv_img
// copy it to vram and convert it to 32bit color using the function above
void drawimage(void)
{
// draw image
int x, y;
u32* vram = (u32*) (0x40000000 | 0x04000000);
for (y = 0; y < 272; y++) {
for (x = 0; x < 480; x++) {
vram[x + y * 512] = pixel_16to32(gfxconv_img[x + y*480]) ;
}
}
}
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kecC
Joined: 04 Jul 2005
Posts: 17
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| Posted: Tue Sep 06, 2005 7:36 pm Post subject: |
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Thanks a lot!
It works! |
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