static void rtgui_freetype_font_get_metrics(struct rtgui_font *font, const char *text, rtgui_rect_t *rect)
{
int index = 0, len;
FT_Error err = 0;
rt_uint16_t w = 0, h = 0;
rt_uint16_t *text_short, *text_ptr;
struct rtgui_freetype_font *freetype;
RT_ASSERT(font != RT_NULL);
RT_ASSERT(rect != RT_NULL);
freetype = (struct rtgui_freetype_font *) font->data;
RT_ASSERT(freetype != RT_NULL);
len = strlen(text);
memset(rect, 0, sizeof(struct rtgui_rect));
/* allocate unicode buffer */
text_short = (rt_uint16_t *)rtgui_malloc((len + 1) * 2);
if (text_short == RT_NULL) return ; /* out of memory */
/* convert gbk to unicode */
gbk_to_unicode(text_short, text, len);
text_ptr = text_short;
while (*text_ptr)
{
index = FT_Get_Char_Index(freetype->face, *text_ptr);
err = FT_Load_Glyph(freetype->face, index, FT_LOAD_DEFAULT);
if (err == 0)
{
w += freetype->face->glyph->bitmap.width;
if (freetype->face->glyph->bitmap.rows > h)
{
h = freetype->face->glyph->bitmap.rows;
}
}
text_ptr ++;
}
rect->x1 = 0;
rect->y1 = 0;
rect->x2 = w;
rect->y2 = h;
/* release unicode buffer */
rtgui_free(text_short);
}
static void rtgui_freetype_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const char* text, rt_ubase_t len, struct rtgui_rect* rect)
{
int index = 0;
FT_Error err = 0;
rt_uint16_t *text_short, *text_ptr;
struct rtgui_freetype_font* freetype;
RT_ASSERT(font != RT_NULL);
freetype = (struct rtgui_freetype_font*) font->data;
RT_ASSERT(freetype != RT_NULL);
/* allocate unicode buffer */
text_short = (rt_uint16_t*)rtgui_malloc((len + 1)* 2);
if (text_short == RT_NULL) return ; /* out of memory */
/* convert gbk to unicode */
gbk_to_unicode(text_short, text, len);
text_ptr = text_short;
while (*text_ptr)
{
index = FT_Get_Char_Index(freetype->face, *text_ptr);
err = FT_Load_Glyph(freetype->face, index, FT_LOAD_DEFAULT|FT_LOAD_RENDER);
if (err == 0)
{
int rows, x;
rt_uint8_t* ptr;
/* render font */
ptr = (rt_uint8_t*)freetype->face->glyph->bitmap.buffer;
for (rows = 0; rows < freetype->face->glyph->bitmap.rows; rows ++)
for (x = 0; x < freetype->face->glyph->bitmap.width; x++)
{
if (*ptr > 0)
rtgui_dc_draw_color_point(dc, rect->x1 + x, rect->y1 + rows, RTGUI_RGB(0xff - *ptr, 0xff - *ptr, 0xff - *ptr));
ptr ++;
}
}
text_ptr ++;
rect->x1 += freetype->face->glyph->bitmap.width;
}
/* release unicode buffer */
rtgui_free(text_short);
}
