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Add UTF-8 support to RGUI. Others still assume ISO-8859-1, they'll have to be fixed one by one before we enable UTF-8 globally.

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This commit is contained in:
Alcaro 2015-09-10 23:08:39 +02:00
parent 64ba6e076b
commit 889a4f4955
2 changed files with 34 additions and 3 deletions
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4
Makefile.common
View File

@ -444,6 +444,10 @@ ifeq ($(HAVE_MENU_COMMON), 1)
menu/drivers/null.o
endif
ifeq ($(UTF8), 1)
DEFINES += -DHAVE_UTF8
endif
ifeq ($(HAVE_STB_FONT), 1)
OBJ += gfx/drivers_font_renderer/stb.o
endif

33
menu/drivers/rgui.c
View File

@ -150,6 +150,33 @@ static void color_rect(menu_handle_t *menu,
frame_buf->data[j * (frame_buf->pitch >> 1) + i] = color;
}
static uint8_t string_walkbyte(const char **string)
{
return *((*string)++);
}
#ifdef HAVE_UTF8
/* Does not validate the input, returns garbage if it's not UTF-8. */
static uint32_t string_walk(const char **string)
{
uint8_t first = string_walkbyte(string);
uint32_t ret;
if (first<128) return first;
ret = 0;
ret = (ret<<6) | (string_walkbyte(string)&0x3F);
if (first >= 0xE0) ret = (ret<<6) | (string_walkbyte(string)&0x3F);
if (first >= 0xF0) ret = (ret<<6) | (string_walkbyte(string)&0x3F);
if (first >= 0xF0) return ret | (first&31)<<18;
if (first >= 0xE0) return ret | (first&15)<<12;
return ret | (first&7)<<6;
}
#else
#define string_walk string_walkbyte
#endif
static void blit_line(menu_handle_t *menu, int x, int y,
const char *message, uint16_t color)
{
@ -159,14 +186,15 @@ static void blit_line(menu_handle_t *menu, int x, int y,
while (*message)
{
uint32_t symbol = string_walk(&message);
for (j = 0; j < FONT_HEIGHT; j++)
{
for (i = 0; i < FONT_WIDTH; i++)
{
uint8_t rem = 1 << ((i + j * FONT_WIDTH) & 7);
int offset = (i + j * FONT_WIDTH) >> 3;
bool col = (disp->font.framebuf[FONT_OFFSET
((unsigned char)*message) + offset] & rem);
bool col = (disp->font.framebuf[FONT_OFFSET(symbol) + offset] & rem);
if (!col)
continue;
@ -177,7 +205,6 @@ static void blit_line(menu_handle_t *menu, int x, int y,
}
x += FONT_WIDTH_STRIDE;
message++;
}
}