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screenshot snippet

 
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weak



Joined: 13 Jan 2005
Posts: 114
Location: Vienna, Austria
PostPosted: Wed Jun 15, 2005 1:01 am    Post subject: screenshot snippet Reply with quote
just made a function to grab the psp's framebuffer and write a screenshot to memory stick (as 24 bit bmp file). thought some of you may have some use for it.

i was just looking to make it work, feel free to improve it ;)

Code:

unsigned char  bmpHeader24[] = { 0x42, 0x4d, 0x38, 0xfa, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x36, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0xe0, 0x01, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x0b, 0x00, 0x00, 0x12, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
unsigned char  buffer[SCREEN_WIDTH*3];
unsigned char  r,g,b;
int                  bufferIndex = 0;
unsigned short p;

file = sceIoOpen(savePath,O_CREAT | O_TRUNC | O_RDWR, 0777);  // savePath should hold the path to your file

// write bmp header
sceIoWrite(file,bmpHeader24,54);
   
// write bmp data
vptr0 = pgGetVramAddr(0,271);   // you can find this function in NEM's sources
for(i=0; i<272; i++)
{      
  vptr=vptr0;
  for(e=0; e<480; e++)
  {
    p = *(unsigned short *)vptr;
    r = (p<<3)&0xf8;
    g = (p>>2)&0xf8;
    b = (p>>7)&0xf8;         
         
    buffer[bufferIndex] = b;
    bufferIndex++;         
    buffer[bufferIndex] = g;
    bufferIndex++;         
    buffer[bufferIndex] = r;
    bufferIndex++;

    vptr+=PIXELSIZE*2;
  }
  // write chunk
  sceIoWrite(file,buffer,SCREEN_WIDTH*3);
  bufferIndex=0;
  vptr0-=LINESIZE*2;
}

// bmp end
unsigned char end[] = { 0x00, 0x00 };
sceIoWrite(file,end,2);

sceIoClose(file);


here are two screenshots from our current project (just for illustration ;))





greetz, weak
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cable16



Joined: 22 Mar 2005
Posts: 22
PostPosted: Wed Jun 15, 2005 1:52 am    Post subject: Reply with quote
that game looks quite nice :)
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Guest
PostPosted: Wed Jun 15, 2005 2:26 am    Post subject: Reply with quote
This is fantastic!

Keep in mind one real good use for this ...

Say you make a game. And you want to make a cool splash screen with a little running animation, just like the commercial PSP games ?

Use this method while running a special "debug" version of the program to save every X frames to the memory stick...

THEN

Distill the frames into a movie of the proper size, and merge back into your EBOOT.PBP file, with your splash screen.

Voila!
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weak



Joined: 13 Jan 2005
Posts: 114
Location: Vienna, Austria
PostPosted: Wed Jun 15, 2005 2:32 am    Post subject: Reply with quote
thx a lot! credits go to pimpot who made the artwork. i'm just writing the code ;)

i'll grab a small ingame movie soon if someone's interested. demo's coming too :)
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Squall333



Joined: 28 Apr 2005
Posts: 91
PostPosted: Wed Jun 15, 2005 3:54 am    Post subject: Reply with quote
This must be good iv never seen gorim so excited
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PostPosted: Wed Jun 15, 2005 3:56 am    Post subject: Reply with quote
Squall333 wrote:
This must be good iv never seen gorim so excited


Hehe ;)

Well I was gearing up to port a favorite game and been thinking about the splashscreen issue. Saved me some effort. ;)
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laxer3a



Joined: 11 May 2005
Posts: 23
PostPosted: Wed Jun 15, 2005 4:04 am    Post subject: Reply with quote
Hey weak,

You could improve the quality of the screenshots by using 32 items lookup table and promote each 5 bit component into 8 bit correctly (normalize) :
For the moment your whites are not white :-P

To create the table, just do (n*255)/31 for each value between 0 and 31.

Still quite usefull anyway.. thats cool !
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numchuckskills



Joined: 04 May 2005
Posts: 35
PostPosted: Mon Jun 27, 2005 4:07 am    Post subject: Reply with quote
im a n00b... where do i throw this code to make it work?

thanks for your patience in advance...
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Shine



Joined: 03 Dec 2004
Posts: 728
Location: Germany
PostPosted: Mon Jun 27, 2005 5:41 am    Post subject: Reply with quote
TGA is a bit shorter, because it has a 16 bit format, with only the rgb components switched in the 16 bit PSP graphics mode:

http://forums.ps2dev.org/viewtopic.php?p=16942#16942
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Yoshihiro



Joined: 14 May 2005
Posts: 12
PostPosted: Mon Jun 27, 2005 7:43 am    Post subject: Re: screenshot snippet Reply with quote
weak wrote:
just made a function to grab the psp's framebuffer and write a screenshot to memory stick (as 24 bit bmp file). thought some of you may have some use for it.

i was just looking to make it work, feel free to improve it ;)

Code:

unsigned char  bmpHeader24[] = { 0x42, 0x4d, 0x38, 0xfa, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x36, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0xe0, 0x01, 0x00, 0x00, 0x10, 0x01, 0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0x0b, 0x00, 0x00, 0x12, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
unsigned char  buffer[SCREEN_WIDTH*3];
unsigned char  r,g,b;
int                  bufferIndex = 0;
unsigned short p;

file = sceIoOpen(savePath,O_CREAT | O_TRUNC | O_RDWR, 0777);  // savePath should hold the path to your file

// write bmp header
sceIoWrite(file,bmpHeader24,54);
   
// write bmp data
vptr0 = pgGetVramAddr(0,271);   // you can find this function in NEM's sources
for(i=0; i<272; i++)
{      
  vptr=vptr0;
  for(e=0; e<480; e++)
  {
    p = *(unsigned short *)vptr;
    r = (p<<3)&0xf8;
    g = (p>>2)&0xf8;
    b = (p>>7)&0xf8;         
         
    buffer[bufferIndex] = b;
    bufferIndex++;         
    buffer[bufferIndex] = g;
    bufferIndex++;         
    buffer[bufferIndex] = r;
    bufferIndex++;

    vptr+=PIXELSIZE*2;
  }
  // write chunk
  sceIoWrite(file,buffer,SCREEN_WIDTH*3);
  bufferIndex=0;
  vptr0-=LINESIZE*2;
}

// bmp end
unsigned char end[] = { 0x00, 0x00 };
sceIoWrite(file,end,2);

sceIoClose(file);


here are two screenshots from our current project (just for illustration ;))





greetz, weak



Weak after when you have the new psptoolchain you can use my simple code for make 2000 screenshot very easy :=) .

Code:

int ScrenshotGen()
{
int fd;
char filename[56];

for(int i=0; i<2000; i++)
{
sprintf(filename, "ms0:/psp/game/Screenshot/screenshot%03d.bmp", i);
fd = sceIoOpen(filename,O_RDONLY);
if(fd < 0)
{
break;
}
sceIoClose(fd);
}
//Your string for make screenshot
YourScrenshotCode( filename);   
return 0;
}

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sq377



Joined: 11 Apr 2005
Posts: 87
PostPosted: Mon Jun 27, 2005 2:01 pm    Post subject: Reply with quote
I believe this has been included in the snes emulator.... Sort of. When you save your state, it takes a screenshot and saves the thumbnail.
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