Re: Bitmaps (several other questions)

Dear Mr. Dowty,

Micah Dowty wrote:

>There are two ways to convert raw RGB data to a picogui bitmap:
>
> - If you want to do it as easily as possible, and you don't
>   need exceptional speed, you can prepend a .PPM header in front
>   and use pgNewBitmap(). There is information about this file
>   format at:
>   http://www-info2.informatik.uni-wuerzburg.de/mitarbeiter/wolfram/lehre/bildformate.html
>
This approach solves my problem. Thank you very much.

But I have several other questions.

1. I would like to create application without panelbar. How I can do it?

2. I'm trying to handle events for PG_WIDGET_CANWAS with the help of 
following code:

int pg_process_events(struct pgEvent *pg_event)
{
  int ch = pg_event->e.kbd.key;

  if (ch >= 32)
    printf("process_event %d %c\n", pg_event->type, ch);
  else
    printf("process_event %d CTRLSYM\n", pg_event->type);
  return 0;
}

unsigned char *pg_init_driver(unsigned char *param, unsigned char *ignore)
{
  pgInit(0, NULL);
  mPGPanel = pgRegisterApp(PG_APP_NORMAL, "Links", 0);
  pgSetWidget(mPGPanel, PG_WP_MARGIN, 0, 0);
  mPGCanvas = pgNewWidget(PG_WIDGET_CANVAS, PG_DERIVE_INSIDE, mPGPanel);
  pgSetWidget(mPGCanvas, PG_WP_TRIGGERMASK,
    pgGetWidget(mPGCanvas, PG_WP_TRIGGERMASK) |
    PG_TRIGGERS_MOUSE | PG_TRIGGERS_KEY,
    0);

  mPGGraphicalContext = pgNewCanvasContext(mPGCanvas, PGFX_IMMEDIATE);
  pgSetLgop(mPGGraphicalContext, PG_LGOP_NONE);
  pgSetMapping(mPGGraphicalContext, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, 
PG_MAP_NONE);
  pgSetColor(mPGGraphicalContext, 0);
  pgBind(mPGCanvas, PGBIND_ANY, &pg_process_events, NULL);

  return NULL;
}

But pg_process_events never prints anything when I'm pressing keys on 
the keyboard. Maybe PG_WIDGET_CANVAS can not handle events from 
keyboard? But it is very important for me to handle such events in my 
application.

Respectfully yours,
Michael.

>
> - If you need more speed but don't mind managing the potential
>   complexity of translating the bitmap into other formats, you
>   can use a shared memory segment. There is a short SHM demo in
>   the apps directory, and a longer example in SDL's picogui video driver.
>
>--Micah
>
>On Tue, Mar 18, 2003 at 07:14:46PM +0300, [email protected] wrote:
>  
>
>>Hello everybody,
>>
>>I would like to create bitmap from raw data. I think I have to use
>>pgCreateBitmap function and then fill this bitmap. I have raw data
>>(3 bytes per pixel as array). How I can do it?
>>
>>-- 
>>Best regards,
>> mic                          mailto:[email protected]
>>
>>
>>
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>
>  
>




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