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Support frame buffers that are larger than the default screen

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size as defined by VT_FB_DEFAULT_WIDTH and VT_FB_DEFAULT_HEIGHT
(at this time 2048x1200). The default is really a max. We cap
the height and width to those defaults and position the screen
in the center of the frame buffer.

Ideally we use a bigger font to utility the entire real estate
that is the frame buffer, but that's seen as an improvement over
making it work first.

PR:		193745
This commit is contained in:
Marcel Moolenaar 2015-08-18 00:47:02 +00:00
parent d0e79aa362
commit ec6b1f6acc
2 changed files with 9 additions and 2 deletions
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10
sys/dev/vt/hw/fb/vt_fb.c
View File

@ -294,6 +294,7 @@ vt_fb_bitblt_bitmap(struct vt_device *vd, const struct vt_window *vw,
if (mask != NULL && (mask[byte] & bit) == 0)
continue;
o = (y + yi) * info->fb_stride + (x + xi) * bpp;
o += vd->vd_transpose;
cc = pattern[byte] & bit ? fgc : bgc;
switch(bpp) {
@ -411,11 +412,16 @@ int
vt_fb_init(struct vt_device *vd)
{
struct fb_info *info;
u_int margin;
int err;
info = vd->vd_softc;
vd->vd_height = info->fb_height;
vd->vd_width = info->fb_width;
vd->vd_height = MIN(VT_FB_DEFAULT_HEIGHT, info->fb_height);
margin = (info->fb_height - vd->vd_height) >> 1;
vd->vd_transpose = margin * info->fb_stride;
vd->vd_width = MIN(VT_FB_DEFAULT_WIDTH, info->fb_width);
margin = (info->fb_width - vd->vd_width) >> 1;
vd->vd_transpose += margin * (info->fb_bpp / NBBY);
vd->vd_video_dev = info->fb_video_dev;
if (info->fb_size == 0)

1
sys/dev/vt/vt.h
View File

@ -140,6 +140,7 @@ struct vt_device {
uint32_t vd_mstate; /* (?) Mouse state. */
vt_axis_t vd_width; /* (?) Screen width. */
vt_axis_t vd_height; /* (?) Screen height. */
size_t vd_transpose; /* (?) Screen offset in FB */
struct mtx vd_lock; /* Per-device lock. */
struct cv vd_winswitch; /* (d) Window switch notify. */
struct callout vd_timer; /* (d) Display timer. */