Randall <[EMAIL PROTECTED]> writes:
> My name is Randall Barber,
> [EMAIL PROTECTED]
>
> I have two open visuals on Linux 6.2 X-Windows. I use one for drawing
> primitives too and the other I use as an interactive color chooser (or I
>
> will). They are named respectively, "screenBuf" and "colorBuf". The
> code follows that I use to open them:
>
> ggi_visual_t *screenBuf;
> ggi_visual_t *colorBuf;
>
> void main(void)
> {
> screenBuf = new ggi_visual_t;
> colorBuf = new ggi_visual_t;
>
> ggiInit();
> *(screenBuf) = ggiOpen(NULL);
> ggiCheckGraphMode(*(screenBuf), 800, 600, 800, 600, GT_32BIT,
> &sug_mode);
> ggiSetMode(*(screenBuf), &sug_mode);
>
> *(colorBuf) = ggiOpen(NULL);
> ggiCheckGraphMode(*(colorBuf), 448, 256, 448, 256, GT_32BIT,
> &sug_mode);
> ggiSetMode(*(colorBuf), &sug_mode);
> .
> .
> .
> }
Highly weird code... You'd want to do:
ggi_visual_t screenBuf;
ggi_visual_t colorBuf;
void main(void)
{
ggiInit();
screenBuf = ggiOpen(NULL);
ggiCheckGraphMode(screenBuf, 800, 600, 800, 600, GT_32BIT,
&sug_mode);
ggiSetMode(screenBuf, &sug_mode);
colorBuf = ggiOpen(NULL);
ggiCheckGraphMode(colorBuf, 448, 256, 448, 256, GT_32BIT,
&sug_mode);
ggiSetMode(colorBuf, &sug_mode);
> As I understsand GGI, all I have to do now is call one of the API
> functions and supply the appropriate visual and it will draw to that
> visual. For instance,
>
> map.r = 0x00; map.b = map.g = 0;
> color = ggiMapColor(*(sceenBuf), &map);
This is all black.
> ggiPutPixel(*(screenBuf), 20, 20, color);
> map.b = 255; map.r = map.g = 0;
This is also black on practicly all supported hardware.
You don't happen to mean map.b = 65535; map.r = map.g ?
> If these lines followed each other in code, I would get a plotted point
> in the respective areas of the separate visuals (as I understand it).
Correct.
> This is NOT happening for me. What have I forgotten? I can draw to
> screenBuf perfectly fine. However, I start colorBuf after the user
> presses a key sequence and then try to display three bars for RGB value
> sliders. They don't appear. I can not write text (ggiPuts) to the
> colorBuf either. I have looked at the API and tried to find the answer
> on my own. I suspect it is a simple thing I have overlooked.
Your code works just fine for me after changing the colors to something
else than black, so I have no idea what your problem can be. If you'd
like to send me a compilable test case that fails for you I'd be
happy to have a look at it.
//Marcus
--
-------------------------------+------------------------------------
Marcus Sundberg | http://www.stacken.kth.se/~mackan
Royal Institute of Technology | Phone: +46 707 452062
Stockholm, Sweden | E-Mail: [EMAIL PROTECTED]
