static int FreeType_Render( LCUI_FontBitmap *bmp, wchar_t ch,
int pixel_size, LCUI_Font *font )
{
int ret = 0;
size_t size;
FT_UInt index;
LCUI_BOOL has_space = FALSE;
FT_Face ft_face = (FT_Face)font->data;
/* 设定字体尺寸 */
FT_Set_Pixel_Sizes( ft_face, 0, pixel_size );
/* 如果是空格 */
if( ch == ' ' ) {
ch = 'a';
has_space = TRUE;
}
index = FT_Get_Char_Index( ft_face, ch );
if( index == 0 ) {
ret = -1;
}
/* 载入该字的字形数据 */
if( FT_Load_Glyph( ft_face, index, LCUI_FONT_LOAD_FALGS ) != 0 ) {
return -2;
}
size = Convert_FTGlyph( bmp, ft_face->glyph, LCUI_FONT_RENDER_MODE );
/* 如果是空格则将位图内容清空 */
if( has_space ) {
memset( bmp->buffer, 0, size );
}
return ret;
}
/** 载入字体位图 */
LCUI_API int FontBMP_Load( LCUI_FontBMP *buff, int font_id,
wchar_t ch, int pixel_size )
{
#ifdef LCUI_FONT_ENGINE_FREETYPE
size_t size;
LCUI_BOOL have_space = FALSE;
FT_Face face;
int error;
if( font_id > 0 ) {
face = FontLIB_GetFontFace( font_id );
if( !face ) {
GetDefaultFontBMP( ch, buff );
return -1;
}
} else {
GetDefaultFontBMP( ch, buff );
return -1;
}
/* 设定字体尺寸 */
FT_Set_Pixel_Sizes( face, 0, pixel_size );
/* 如果是空格 */
if( ch == ' ' ) {
ch = 'a';
have_space = TRUE;
}
/* 这个函数只是简单地调用FT_Get_Char_Index和FT_Load_Glyph */
error = FT_Load_Char( face, ch, LCUI_FONT_LOAD_FALGS );
if(error) {
return error;
}
size = Convert_FTGlyph( buff, face->glyph, LCUI_FONT_RENDER_MODE );
/* 如果是空格则将位图内容清空 */
if( have_space ) {
memset( buff->buffer, 0, size );
}
return 0;
#else
GetDefaultFontBMP( ch, buff );
return -1;
#endif
}