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authorAntonino A. Daplas <adaplas@gmail.com>2007-05-08 00:39:11 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:31 -0700
commit2d2699d984924890f6dac8cf51c3b6311f56816c (patch)
treebd8f50392ac6918589c6069177b89172f2263916
parentbf26ad72a60c0009a99179b449a43daa6bf4b4f6 (diff)
fbcon: font setting should check limitation of driver
fbcon_set_font() will now check if the new font dimensions can be drawn by the driver (by checking pixmap.blit_x and blit_y). Similarly, add 2 new parameters to get_default_font(), font_w and font_h, to further aid in the font selection process. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/video/console/fbcon.c17
-rw-r--r--drivers/video/console/fonts.c10
-rw-r--r--drivers/video/console/sticore.c2
-rw-r--r--include/linux/font.h3
4 files changed, 26 insertions, 6 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 19dfdfbd4341..c71a88d531cd 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -988,7 +988,9 @@ static const char *fbcon_startup(void)
if (!p->fontdata) {
if (!fontname[0] || !(font = find_font(fontname)))
font = get_default_font(info->var.xres,
- info->var.yres);
+ info->var.yres,
+ info->pixmap.blit_x,
+ info->pixmap.blit_y);
vc->vc_font.width = font->width;
vc->vc_font.height = font->height;
vc->vc_font.data = (void *)(p->fontdata = font->data);
@@ -1108,7 +1110,9 @@ static void fbcon_init(struct vc_data *vc, int init)
if (!fontname[0] || !(font = find_font(fontname)))
font = get_default_font(info->var.xres,
- info->var.yres);
+ info->var.yres,
+ info->pixmap.blit_x,
+ info->pixmap.blit_y);
vc->vc_font.width = font->width;
vc->vc_font.height = font->height;
vc->vc_font.data = (void *)(p->fontdata = font->data);
@@ -2495,6 +2499,7 @@ static int fbcon_copy_font(struct vc_data *vc, int con)
static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
{
+ struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
unsigned charcount = font->charcount;
int w = font->width;
int h = font->height;
@@ -2508,6 +2513,11 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigne
if (charcount != 256 && charcount != 512)
return -EINVAL;
+ /* Make sure drawing engine can handle the font */
+ if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
+ !(info->pixmap.blit_y & (1 << (font->height - 1))))
+ return -EINVAL;
+
size = h * pitch * charcount;
new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
@@ -2552,7 +2562,8 @@ static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, cha
const struct font_desc *f;
if (!name)
- f = get_default_font(info->var.xres, info->var.yres);
+ f = get_default_font(info->var.xres, info->var.yres,
+ info->pixmap.blit_x, info->pixmap.blit_y);
else if (!(f = find_font(name)))
return -ENOENT;
diff --git a/drivers/video/console/fonts.c b/drivers/video/console/fonts.c
index c960728b7e82..a6828d0a4c56 100644
--- a/drivers/video/console/fonts.c
+++ b/drivers/video/console/fonts.c
@@ -98,6 +98,8 @@ const struct font_desc *find_font(const char *name)
* get_default_font - get default font
* @xres: screen size of X
* @yres: screen size of Y
+ * @font_w: bit array of supported widths (1 - 32)
+ * @font_h: bit array of supported heights (1 - 32)
*
* Get the default font for a specified screen size.
* Dimensions are in pixels.
@@ -107,7 +109,8 @@ const struct font_desc *find_font(const char *name)
*
*/
-const struct font_desc *get_default_font(int xres, int yres)
+const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
+ u32 font_h)
{
int i, c, cc;
const struct font_desc *f, *g;
@@ -129,6 +132,11 @@ const struct font_desc *get_default_font(int xres, int yres)
#endif
if ((yres < 400) == (f->height <= 8))
c += 1000;
+
+ if (!(font_w & (1 << (f->width - 1))) ||
+ !(font_w & (1 << (f->height - 1))))
+ c += 1000;
+
if (c > cc) {
cc = c;
g = f;
diff --git a/drivers/video/console/sticore.c b/drivers/video/console/sticore.c
index 88e7038eab88..717b360d0415 100644
--- a/drivers/video/console/sticore.c
+++ b/drivers/video/console/sticore.c
@@ -495,7 +495,7 @@ sti_select_fbfont(struct sti_cooked_rom *cooked_rom, const char *fbfont_name)
return NULL;
fbfont = find_font(fbfont_name);
if (!fbfont)
- fbfont = get_default_font(1024,768);
+ fbfont = get_default_font(1024,768, ~(u32)0, ~(u32)0);
if (!fbfont)
return NULL;
diff --git a/include/linux/font.h b/include/linux/font.h
index 53b129f07f6f..40a24ab41b36 100644
--- a/include/linux/font.h
+++ b/include/linux/font.h
@@ -49,7 +49,8 @@ extern const struct font_desc *find_font(const char *name);
/* Get the default font for a specific screen size */
-extern const struct font_desc *get_default_font(int xres, int yres);
+extern const struct font_desc *get_default_font(int xres, int yres,
+ u32 font_w, u32 font_h);
/* Max. length for the name of a predefined font */
#define MAX_FONT_NAME 32