[PATCH] lib: font: fbconsole: add custom font support
Du Huanpeng
u74147 at gmail.com
Wed Nov 4 07:24:58 PST 2015
this patch enable you to add new char support. with customer char
set(no need to be full char set), font size.
Signed-off-by: Du Huanpeng <u74147 at gmail.com>
---
drivers/video/fbconsole.c | 43 +++++++++++++++++++++----------------------
include/linux/font.h | 11 ++++++++++-
lib/fonts/Kconfig | 5 +++++
lib/fonts/Makefile | 2 ++
lib/fonts/font_7x14.c | 1 +
lib/fonts/font_8x16.c | 1 +
lib/fonts/font_custom_16x.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
lib/fonts/font_mini_4x6.c | 1 +
lib/fonts/fonts.c | 38 +++++++++++++++++++++++++++++++++++---
9 files changed, 120 insertions(+), 26 deletions(-)
create mode 100644 lib/fonts/font_custom_16x.c
diff --git a/drivers/video/fbconsole.c b/drivers/video/fbconsole.c
index b10503e..4c4fc67 100644
--- a/drivers/video/fbconsole.c
+++ b/drivers/video/fbconsole.c
@@ -22,10 +22,10 @@ struct fbc_priv {
struct param_d *par_font;
int par_font_val;
- int font_width, font_height;
- const u8 *fontdata;
- unsigned int cols, rows;
- unsigned int x, y; /* cursor position */
+ const struct font_desc *font;
+
+ unsigned int cols, rows; /*FIXME: different width chars? */
+ unsigned int x, y; /* cursor position */
enum state_t state;
@@ -84,7 +84,7 @@ static struct rgb colors[] = {
{ 255, 255, 255 },
};
-static void drawchar(struct fbc_priv *priv, int x, int y, char c)
+static void drawchar(struct fbc_priv *priv, int x, int y, int c)
{
void *buf;
int bpp = priv->fb->bits_per_pixel >> 3;
@@ -97,7 +97,8 @@ static void drawchar(struct fbc_priv *priv, int x, int y, char c)
buf = gui_screen_render_buffer(priv->sc);
- inbuf = &priv->fontdata[c * priv->font_height];
+ i = find_font_index(priv->font, c);
+ inbuf = priv->font->data + i;
line_length = priv->fb->line_length;
@@ -113,13 +114,13 @@ static void drawchar(struct fbc_priv *priv, int x, int y, char c)
rgb = &colors[bgcolor];
bgcolor = gu_rgb_to_pixel(priv->fb, rgb->r, rgb->g, rgb->b, 0xff);
- for (i = 0; i < priv->font_height; i++) {
+ for (i = 0; i < priv->font->height; i++) {
uint8_t t = inbuf[i];
int j;
- adr = buf + line_length * (y * priv->font_height + i) + x * priv->font_width * bpp;
+ adr = buf + line_length * (y * priv->font->height + i) + x * priv->font->width * bpp;
- for (j = 0; j < priv->font_width; j++) {
+ for (j = 0; j < priv->font->width; j++) {
if (t & 0x80)
gu_set_pixel(priv->fb, adr, color);
else
@@ -137,10 +138,10 @@ static void video_invertchar(struct fbc_priv *priv, int x, int y)
buf = gui_screen_render_buffer(priv->sc);
- gu_invert_area(priv->fb, buf, x * priv->font_width, y * priv->font_height,
- priv->font_width, priv->font_height);
- gu_screen_blit_area(priv->sc, x * priv->font_width, y * priv->font_height,
- priv->font_width, priv->font_height);
+ gu_invert_area(priv->fb, buf, x * priv->font->width, y * priv->font->height,
+ priv->font->width, priv->font->height);
+ gu_screen_blit_area(priv->sc, x * priv->font->width, y * priv->font->height,
+ priv->font->width, priv->font->height);
}
static void printchar(struct fbc_priv *priv, int c)
@@ -174,9 +175,9 @@ static void printchar(struct fbc_priv *priv, int c)
default:
drawchar(priv, priv->x, priv->y, c);
- gu_screen_blit_area(priv->sc, priv->x * priv->font_width,
- priv->y * priv->font_height,
- priv->font_width, priv->font_height);
+ gu_screen_blit_area(priv->sc, priv->x * priv->font->width,
+ priv->y * priv->font->height,
+ priv->font->width, priv->font->height);
priv->x++;
if (priv->x > priv->cols) {
@@ -188,7 +189,7 @@ static void printchar(struct fbc_priv *priv, int c)
if (priv->y > priv->rows) {
void *buf;
u32 line_length = priv->fb->line_length;
- int line_height = line_length * priv->font_height;
+ int line_height = line_length * priv->font->height;
buf = gui_screen_render_buffer(priv->sc);
@@ -355,12 +356,10 @@ static int setup_font(struct fbc_priv *priv)
return -ENOENT;
}
- priv->font_width = font->width;
- priv->font_height = font->height;
- priv->fontdata = font->data;
+ priv->font = font;
- priv->rows = fb->yres / priv->font_height - 1;
- priv->cols = fb->xres / priv->font_width - 1;
+ priv->rows = fb->yres / priv->font->height - 1;
+ priv->cols = fb->xres / priv->font->width - 1;
return 0;
}
diff --git a/include/linux/font.h b/include/linux/font.h
index 62b1879..d7fb415 100644
--- a/include/linux/font.h
+++ b/include/linux/font.h
@@ -12,20 +12,29 @@
#define _VIDEO_FONT_H
#include <param.h>
+#include <wchar.h>
+struct font_index {
+ wchar_t wc; /* code of the char. */
+ short index; /* offset of the char in the bitmap. */
+};
struct font_desc {
const char *name;
int width, height;
+ struct font_index *index;
const void *data;
+ int num_chars;
};
extern const struct font_desc font_vga_8x16,
font_7x14,
- font_mini_4x6;
+ font_mini_4x6,
+ font_custom_16x;
/* Max. length for the name of a predefined font */
#define MAX_FONT_NAME 32
+extern int find_font_index(const struct font_desc *font, int ch);
extern const struct font_desc *find_font_enum(int n);
extern struct param_d *add_param_font(struct device_d *dev,
int (*set)(struct param_d *p, void *priv),
diff --git a/lib/fonts/Kconfig b/lib/fonts/Kconfig
index 715d5e5..d23b283 100644
--- a/lib/fonts/Kconfig
+++ b/lib/fonts/Kconfig
@@ -20,6 +20,11 @@ config FONT_7x14
config FONT_MINI_4x6
bool "Mini 4x6 font"
+config FONT_CUSTOM_16X
+ bool "Custom 16x16 font"
+ help
+ This font is useful for Chinese and other non ascii chars.
+
config FONT_AUTOSELECT
def_bool y
depends on !FONT_MINI_4x6
diff --git a/lib/fonts/Makefile b/lib/fonts/Makefile
index b7d4765..7de5c76 100644
--- a/lib/fonts/Makefile
+++ b/lib/fonts/Makefile
@@ -5,7 +5,9 @@ font-objs := fonts.o
font-objs-$(CONFIG_FONT_8x16) += font_8x16.o
font-objs-$(CONFIG_FONT_7x14) += font_7x14.o
font-objs-$(CONFIG_FONT_MINI_4x6) += font_mini_4x6.o
+font-objs-$(CONFIG_FONT_CUSTOM_16X)+= font_custom_16x.o
font-objs += $(font-objs-y)
obj-$(CONFIG_FONTS) += font.o
+
diff --git a/lib/fonts/font_7x14.c b/lib/fonts/font_7x14.c
index fe99871..60cb57e 100644
--- a/lib/fonts/font_7x14.c
+++ b/lib/fonts/font_7x14.c
@@ -4113,4 +4113,5 @@ const struct font_desc font_7x14 = {
.width = 7,
.height = 14,
.data = fontdata_7x14,
+ .index = NULL,
};
diff --git a/lib/fonts/font_8x16.c b/lib/fonts/font_8x16.c
index 4717ead..0ba2921 100644
--- a/lib/fonts/font_8x16.c
+++ b/lib/fonts/font_8x16.c
@@ -4626,5 +4626,6 @@ const struct font_desc font_vga_8x16 = {
.width = 8,
.height = 16,
.data = fontdata_8x16,
+ .index = NULL,
};
EXPORT_SYMBOL(font_vga_8x16);
diff --git a/lib/fonts/font_custom_16x.c b/lib/fonts/font_custom_16x.c
new file mode 100644
index 0000000..b83387d
--- /dev/null
+++ b/lib/fonts/font_custom_16x.c
@@ -0,0 +1,44 @@
+/*
+ * by Du Huanpeng <u74147 at gmail.com>
+ */
+
+#include <linux/font.h>
+#include <common.h>
+
+/* place real font data here or set fontdata_custom_16x points to
+ * the address of font data and also setup the index.
+ */
+
+static const unsigned char fontdata_custom_16x[] = {
+ 0xFF, 0xFF, /*OOOOOOOOOOOOOOOO*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0x80, 0x01, /*O O*/
+ 0xFF, 0xFF, /*OOOOOOOOOOOOOOOO*/
+};
+
+static struct font_index fontdata_custom_16x_index[] = {
+ { 0x0000, 0x0000 },
+};
+
+const struct font_desc font_custom_16x = {
+ .name = "CUSTOM-16x",
+ .width = 16,
+ .height = 16,
+ .data = fontdata_custom_16x,
+ .index = fontdata_custom_16x_index,
+ .num_chars = ARRAY_SIZE(fontdata_custom_16x_index),
+
+};
+
diff --git a/lib/fonts/font_mini_4x6.c b/lib/fonts/font_mini_4x6.c
index 3ecb4fb..733d20a 100644
--- a/lib/fonts/font_mini_4x6.c
+++ b/lib/fonts/font_mini_4x6.c
@@ -2152,4 +2152,5 @@ const struct font_desc font_mini_4x6 = {
.width = 4,
.height = 6,
.data = fontdata_mini_4x6,
+ .index = NULL,
};
diff --git a/lib/fonts/fonts.c b/lib/fonts/fonts.c
index 5a9d3f1..6bc2af1 100644
--- a/lib/fonts/fonts.c
+++ b/lib/fonts/fonts.c
@@ -7,6 +7,10 @@
* 2001 - Documented with DocBook
* - Brad Douglas <brad at neruo.com>
*
+ * 2015 - Add custom font supports
+ * - Du Huanpeng <u74147 at gmail.com>
+ *
+ *
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
@@ -23,15 +27,19 @@
static const struct font_desc *fonts[] = {
#ifdef CONFIG_FONT_8x16
#undef NO_FONTS
- &font_vga_8x16,
+ &font_vga_8x16,
#endif
#ifdef CONFIG_FONT_7x14
#undef NO_FONTS
- &font_7x14,
+ &font_7x14,
#endif
#ifdef CONFIG_FONT_MINI_4x6
#undef NO_FONTS
- &font_mini_4x6,
+ &font_mini_4x6,
+#endif
+#ifdef CONFIG_FONT_CUSTOM_16X
+#undef NO_FONTS
+ &font_custom_16x,
#endif
};
@@ -51,6 +59,30 @@ const struct font_desc *find_font_enum(int n)
return fonts[n];
}
+int find_font_index(const struct font_desc *font, int ch)
+{
+ int index;
+ if (font->index == NULL) {
+ index = font->width + 7;
+ index /= 8;
+ index *= font->height;
+ index *= ch;
+ } else {
+ /*
+ * FIXME: use binary search instead!
+ */
+ index = font->num_chars - 1;
+
+ while (index && font->index[index].wc != ch)
+ index--;
+
+ /* return 0 if not found. */
+ index = font->index->index;
+ }
+
+ return index;
+}
+
struct param_d *add_param_font(struct device_d *dev,
int (*set)(struct param_d *p, void *priv),
int (*get)(struct param_d *p, void *priv),
--
1.9.1
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