Re: Is a FontCache worth implementing ?

[James S. <jsi...@li...>]

>I think we should differentiate between pattern expansion fills and image
>writes (as said before). Also some card offer both a limited size pattern
>fill (mostly 32x32 i guess), but also a more generic patterned rendering,
>where any kind of bitmap can be expanded. (well a rectangular area of
>anysize). This would be faster by a factor of (depth of framebuffer) that
>using image writed for monochrome fonts.

No problem. I think the api is felxiable enough. Example psuedo code:

struct fb_image {
        __u32 width;                    /* Size of image */
        __u32 height;
        __u16 x;                        /* Where to place image */
        __u16 y;
        __u32 fg_color;                 /* Only used when a mono bitmap */
        __u32 bg_color;
        __u8  depth;                    /* Dpeth of the image */
        char  *data;                    /* Pointer to image data */
};

xxxfb_drawimage(struct fb_info *p, struct fb_image *image)
{
   if (image->depth == 1) {
	/* Use pattern fill */
   } else {
	/* Draw a color image */
   }
}

MS: (n) 1. A debilitating and surprisingly widespread affliction that
renders the sufferer barely able to perform the simplest task. 2. A disease.

James Simmons  [jsi...@li...]               ____/|
fbdev/console/gfx developer                             \ o.O|
http://www.linux-fbdev.org                               =(_)=
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