diff options
| -rw-r--r-- | components/rtgui/common/font_freetype.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/components/rtgui/common/font_freetype.c b/components/rtgui/common/font_freetype.c new file mode 100644 index 0000000000..906e986227 --- /dev/null +++ b/components/rtgui/common/font_freetype.c @@ -0,0 +1,201 @@ +#include <rtgui/dc.h>
+#include <rtgui/font.h>
+#include <rtgui/tree.h>
+#include <rtgui/rtgui_system.h>
+
+#include <ft2build.h>
+#include <freetype/freetype.h> +#include <freetype/ftglyph.h> +
+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);
+static void rtgui_freetype_font_get_metrics(struct rtgui_font* font, const char* text, rtgui_rect_t* rect);
+
+struct rtgui_font_engine freetype_font_engine =
+{
+ RT_NULL,
+ RT_NULL,
+ rtgui_freetype_font_draw_text,
+ rtgui_freetype_font_get_metrics
+};
+
+struct rtgui_freetype_font
+{
+ int bold;
+ int italic;
+
+ FT_Face face;
+ FT_Library library;
+};
+
+static rt_uint16_t *LATIN1_to_UNICODE(rt_uint16_t *unicode, const char *text, int len)
+{
+ int i;
+
+ for ( i=0; i < len; ++i ) {
+ unicode[i] = ((const unsigned char *)text)[i];
+ }
+ unicode[i] = 0;
+
+ return unicode;
+}
+
+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[32], *text_ptr;
+ struct rtgui_freetype_font* freetype;
+
+ RT_ASSERT(font != RT_NULL);
+ freetype = (struct rtgui_freetype_font*) font->data;
+ RT_ASSERT(freetype != RT_NULL);
+
+ LATIN1_to_UNICODE(text_short, text, len);
+ text_ptr = &text_short[0];
+
+ 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));
+ // rtgui_dc_draw_point(dc, rect->x1 + x, rect->y1 + rows);
+
+ ptr ++;
+ }
+ }
+
+ text_ptr ++;
+ rect->x1 += freetype->face->glyph->bitmap.width;
+ }
+}
+
+static void rtgui_freetype_font_get_metrics(struct rtgui_font* font, const char* text, rtgui_rect_t* rect)
+{
+ int index = 0;
+ FT_Error err = 0;
+ rt_uint16_t w = 0, h = 0;
+ const rt_uint16_t *text_short;
+ struct rtgui_freetype_font* freetype;
+
+ RT_ASSERT(font != RT_NULL);
+ freetype = (struct rtgui_freetype_font*) font->data;
+ RT_ASSERT(freetype != RT_NULL);
+
+ text_short = (const rt_uint16_t*) text;
+ while (*text_short)
+ {
+ index = FT_Get_Char_Index(freetype->face, *text_short);
+ 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_short ++;
+ }
+
+ rect->x1 = 0; rect->y1 = 0;
+ rect->x2 = w; rect->y2 = h;
+}
+
+rtgui_font_t* rtgui_freetype_font_create(const char* filename, int bold, int italic, rt_size_t size)
+{
+ FT_Error err = 0;
+ struct rtgui_font* font;
+
+ font = (struct rtgui_font*) rtgui_malloc (sizeof(struct rtgui_font));
+ if (font != RT_NULL)
+ {
+ struct rtgui_freetype_font* freetype;
+
+ freetype = (struct rtgui_freetype_font*) rtgui_malloc (sizeof(struct rtgui_freetype_font));
+ if (freetype == RT_NULL)
+ {
+ rt_free(font);
+ font = RT_NULL;
+ }
+ else
+ {
+ err = FT_Init_FreeType(&freetype->library);
+ if((err = FT_New_Face(freetype->library, filename, 0, &freetype->face)))
+ {
+ FT_Done_FreeType(freetype->library);
+
+ rt_free(font);
+ font = RT_NULL;
+ }
+ else
+ {
+ err = FT_Select_Charmap(freetype->face, ft_encoding_unicode);
+ if(err)
+ {
+ err = FT_Select_Charmap(freetype->face, ft_encoding_latin_1 );
+ }
+
+ err = FT_Set_Pixel_Sizes(freetype->face, 0, size);
+ if (err != 0)
+ {
+ rtgui_free(font);
+ font = RT_NULL;
+
+ FT_Done_FreeType(freetype->library);
+ rtgui_free(freetype);
+
+ return RT_NULL;
+ }
+
+ freetype->bold = bold;
+ freetype->italic = italic;
+
+ rt_kprintf("fonfile:%s\n", filename);
+ rt_kprintf("font family_name:%s\n", freetype->face->family_name);
+ rt_kprintf("font style_name:%s\n", freetype->face->style_name);
+
+ /* set user data */
+ font->data = freetype;
+ font->family = rt_strdup(freetype->face->family_name);
+ font->height = (rt_uint16_t)size;
+ font->refer_count = 0;
+ font->engine = &freetype_font_engine;
+
+ /* add to system */
+ rtgui_font_system_add_font(font);
+ }
+ }
+ }
+
+ return font;
+}
+
+void rtgui_freetype_font_destroy(rtgui_font_t* font)
+{
+ struct rtgui_freetype_font* freetype;
+
+ RT_ASSERT(font != RT_NULL);
+ freetype = (struct rtgui_freetype_font*) font->data;
+ RT_ASSERT(freetype != RT_NULL);
+
+ rtgui_font_system_remove_font(font);
+
+ FT_Done_Face (freetype->face);
+ FT_Done_FreeType(freetype->library);
+ rtgui_free(freetype);
+ rtgui_free(font);
+}
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