[PATCH] font: fbconsole: add custom font support
Du Huanpeng
u74147 at gmail.com
Thu Nov 12 02:13:25 PST 2015
add custom font and charset support. useful for
non ascii chars, e.g. Chinese and others.
Signed-off-by: Du Huanpeng <u74147 at gmail.com>
---
drivers/video/fbconsole.c | 5 +++--
include/linux/font.h | 11 ++++++++++-
lib/fonts/Kconfig | 5 +++++
lib/fonts/Makefile | 1 +
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 | 32 ++++++++++++++++++++++++++++++++
9 files changed, 98 insertions(+), 3 deletions(-)
create mode 100644 lib/fonts/font_custom_16x.c
diff --git a/drivers/video/fbconsole.c b/drivers/video/fbconsole.c
index 60f3c48..7fd4047 100644
--- a/drivers/video/fbconsole.c
+++ b/drivers/video/fbconsole.c
@@ -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->font->data[c * priv->font->height];
+ i = find_font_index(priv->font, c);
+ inbuf = priv->font->data + i;
line_length = priv->fb->line_length;
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..98245b3 100644
--- a/lib/fonts/Makefile
+++ b/lib/fonts/Makefile
@@ -5,6 +5,7 @@ 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)
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..103dbe8
--- /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 39efb61..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.
@@ -33,6 +37,10 @@ static const struct font_desc *fonts[] = {
#undef NO_FONTS
&font_mini_4x6,
#endif
+#ifdef CONFIG_FONT_CUSTOM_16X
+#undef NO_FONTS
+ &font_custom_16x,
+#endif
};
#define num_fonts ARRAY_SIZE(fonts)
@@ -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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