The "xc" Package
These routines are meant to provide an abstracted interface to X displays
and colourmaps, used in the kcmap routines.
Library: karmaX11
Link With: -lkarmaX11
Functions
Functions
Kdisplay
xc_get_dpy_handle (Display *display, Colormap cmap)
Generate a display handle for later use.
Parameters:
- display :
The X display.
- cmap :
The X colourmap ID.
Returns: A pointer to the display handle on success, else NULL.
Multithreading Level: Unsafe
unsigned int
xc_alloc_colours (unsigned int num_cells,
unsigned long *pixel_values,
unsigned int min_cells, Kdisplay dpy_handle)
This routine will allocate a number of colourcells in a low level
colourmap (e.g. using the Xlib routine XAllocColorCells).
Parameters:
- num_cells :
The number of colourcells to allocate.
- pixel_values :
A pointer to the array where the pixel values allocated will
be written.
- min_cells :
The minimum number of colourcells to allocate. The routine will
try to allocate at least this number of colourcells.
- dpy_handle :
The low level display handle. The meaning of this value
depends on the lower level graphics library used.
Returns: The number of colourcells allocated.
Multithreading Level: Unsafe
void
xc_free_colours (unsigned int num_cells, unsigned long *pixel_values,
Kdisplay dpy_handle)
Free a number of colourcells in a low level colourmap.
Parameters:
- num_cells :
The number of colourcells to free.
- pixel_values :
The array of pixel values (colourcells) to free.
- dpy_handle :
The low level display handle. The meaning of this value
depends on the lower level graphics library used.
Returns: Nothing.
Multithreading Level: Unsafe
void
xc_store_colours (unsigned int num_cells, unsigned long *pixel_values,
unsigned short *reds, unsigned short *greens,
unsigned short *blues, unsigned int stride,
Kdisplay dpy_handle)
Store colours into a low level colourmap.
Parameters:
- num_cells :
The number of colourcells to store.
- pixel_values :
The array of pixel values.
- reds :
The array of red intensity values.
- greens :
The array of green intensity values.
- blues :
The array of blue intensity values.
- stride :
The stride (in unsigned shorts) between intensity values in each
array.
- dpy_handle :
The low level display handle. The meaning of this value
depends on the lower level graphics library used.
Returns: Nothing.
Multithreading Level: Unsafe
void
xc_get_location (Kdisplay dpy_handle, unsigned long *serv_hostaddr,
unsigned long *serv_display_num)
Determine the location of the graphics display being used.
Parameters:
- dpy_handle :
The low level display handle. The meaning of this value
depends on the lower level graphics library used.
- serv_hostaddr :
The Internet address of the host on which the display is
running will be written here.
- serv_display_num :
The number of the display will be written here.
Returns: Nothing.
Multithreading Level: Unsafe
Colormap
xc_get_cmap (Kdisplay dpy_handle)
Get the X11 colourmap for a display handle.
Parameters:
- dpy_handle :
The display handle.
Returns: The X11 colourmap.
Multithreading Level: Unsafe
Contact: Richard Gooch
Web Development: Ariel Internet Services