MiniGUI API Reference (MiniGUI-Processes)  v3.2.0
A mature and proven cross-platform GUI system for embedded and smart IoT devices
Data Structures | Macros | Typedefs | Enumerations | Functions
Logical font operations

Data Structures

struct  _LOGFONT
 
struct  _DEVFONT
 
struct  _FONTMETRICS
 
struct  _GLYPHBITMAP
 

Macros

#define FONT_CHARSET_GB1988_0   "GB1988-0"
 EUC encoding of GB1988 charset, treat as ISO8859-1. More...
 
#define FONT_CHARSET_GB2312_0   "GB2312-0"
 EUC encoding of GB2312 charset. More...
 
#define FONT_CHARSET_GB18030_0   "GB18030-0"
 EUC encoding of GB18030 charset. More...
 
#define FONT_CHARSET_EUCTW   "EUC-TW"
 EUC encoding of CNS11643 charset, not supported. More...
 
#define FONT_CHARSET_KSC5636_0   "KSC5636-0"
 EUC encoding of KSC5636 charset, treat as ISO8859-1. More...
 
#define FONT_CHARSET_KSC5601_0   "KSC5601-0"
 EUC encoding of KSC5601 charset. More...
 
#define FONT_CHARSET_JISX0201_0   "JISX0201-0"
 EUC encoding of JISX0201 charset. More...
 
#define FONT_CHARSET_JISX0208_0   "JISX0208-0"
 EUC encoding of JISX0208 charset. More...
 
#define FONT_CHARSET_JISX0201_1   "JISX0201-1"
 Shift-JIS encoding of JISX0201 charset. More...
 
#define FONT_CHARSET_JISX0208_1   "JISX0208-1"
 Shift-JIS encoding of JISX0208 charset. More...
 
#define FONT_CHARSET_ISO_10646_1   "ISO-10646-1"
 UCS-2 encoding of UNICODE. More...
 
#define FONT_CHARSET_UTF8   "UTF-8"
 UTF-8 encoding of UNICODE. More...
 
#define FONT_CHARSET_UTF16LE   "UTF-16LE"
 UTF-16 encoding (Little-Endian) of UNICODE. More...
 
#define FONT_CHARSET_UTF16BE   "UTF-16BE"
 UTF-16 encoding (Big-Endian) of UNICODE. More...
 
#define INV_LOGFONT   0
 Invalid logfont. More...
 

Typedefs

typedef struct _LOGFONT LOGFONT
 
typedef LOGFONTPLOGFONT
 Data type of pointer to a LOGFONT. More...
 
typedef const LOGFONTCPLOGFONT
 Data type of pointer to a const LOGFONT. More...
 
typedef struct _WORDINFO WORDINFO
 Date type of _WORDINFO. More...
 
typedef struct _FONTMETRICS FONTMETRICS
 
typedef struct _GLYPHBITMAP GLYPHBITMAP
 

Enumerations

Functions

MG_EXPORT void GUIAPI GetFontMetrics (LOGFONT *log_font, FONTMETRICS *font_metrics)
 Gets metrics information of a logical font. More...
 
MG_EXPORT void GUIAPI GetGlyphBitmap (LOGFONT *log_font, const char *mchar, int mchar_len, GLYPHBITMAP *glyph_bitmap)
 Gets the glyph bitmap information when uses a logical font to output a character. More...
 
MG_EXPORT BOOL GUIAPI InitVectorialFonts (void)
 Initializes vectorial font renderer. More...
 
MG_EXPORT void GUIAPI TermVectorialFonts (void)
 Terminates vectorial font renderer. More...
 
MG_EXPORT PLOGFONT GUIAPI CreateLogFont (const char *type, const char *family, const char *charset, char weight, char slant, char flip, char other, char underline, char struckout, int size, int rotation)
 Creates a logical font. More...
 
MG_EXPORT PLOGFONT GUIAPI CreateLogFontByName (const char *font_name)
 Creates a logical font by a font name. More...
 
MG_EXPORT PLOGFONT GUIAPI CreateLogFontIndirect (LOGFONT *logfont)
 Creates a logical font indirectly from a LOGFONT structure. More...
 
MG_EXPORT void GUIAPI DestroyLogFont (PLOGFONT log_font)
 Destroys a logical font. More...
 
MG_EXPORT void GUIAPI GetLogFontInfo (HDC hdc, LOGFONT *log_font)
 Gets logical font information of a DC. More...
 
MG_EXPORT PLOGFONT GUIAPI GetCurFont (HDC hdc)
 Gets the pointer to the current logical font of a DC. More...
 
MG_EXPORT PLOGFONT GUIAPI SelectFont (HDC hdc, PLOGFONT log_font)
 Selects a logical font into a DC. More...
 
MG_EXPORT const DEVFONT *GUIAPI GetNextDevFont (const DEVFONT *dev_font)
 Get next devfont information. More...
 
MG_EXPORT BOOL GUIAPI ft2SetLcdFilter (LOGFONT *logfont, mg_FT_LcdFilter filter)
 Set freetype2 smooth mode. More...
 
MG_EXPORT DEVFONT *GUIAPI LoadDevFontFromFile (const char *devfont_name, const char *file_name)
 Load device font from font file. More...
 
MG_EXPORT void GUIAPI DestroyDynamicDevFont (DEVFONT **devfont)
 Destroy device font loaded dynamically from font file. More...
 

Detailed Description

MiniGUI uses logical font to render text in a DC. You can create a logical font by using CreateLogFont and select it into a DC by using SelectFont, then you can use this logical font to render text by using TextOutLen or DrawTextEx.

Macro Definition Documentation

#define FONT_CHARSET_EUCTW   "EUC-TW"

EUC encoding of CNS11643 charset, not supported.

Definition at line 5625 of file gdi.h.

#define FONT_CHARSET_GB18030_0   "GB18030-0"

EUC encoding of GB18030 charset.

Definition at line 5618 of file gdi.h.

#define FONT_CHARSET_GB1988_0   "GB1988-0"

EUC encoding of GB1988 charset, treat as ISO8859-1.

Definition at line 5605 of file gdi.h.

#define FONT_CHARSET_GB2312_0   "GB2312-0"

EUC encoding of GB2312 charset.

Definition at line 5611 of file gdi.h.

#define FONT_CHARSET_ISO_10646_1   "ISO-10646-1"

UCS-2 encoding of UNICODE.

Definition at line 5670 of file gdi.h.

#define FONT_CHARSET_JISX0201_0   "JISX0201-0"

EUC encoding of JISX0201 charset.

Definition at line 5645 of file gdi.h.

#define FONT_CHARSET_JISX0201_1   "JISX0201-1"

Shift-JIS encoding of JISX0201 charset.

Definition at line 5658 of file gdi.h.

#define FONT_CHARSET_JISX0208_0   "JISX0208-0"

EUC encoding of JISX0208 charset.

Definition at line 5651 of file gdi.h.

#define FONT_CHARSET_JISX0208_1   "JISX0208-1"

Shift-JIS encoding of JISX0208 charset.

Definition at line 5664 of file gdi.h.

#define FONT_CHARSET_KSC5601_0   "KSC5601-0"

EUC encoding of KSC5601 charset.

Definition at line 5638 of file gdi.h.

#define FONT_CHARSET_KSC5636_0   "KSC5636-0"

EUC encoding of KSC5636 charset, treat as ISO8859-1.

Definition at line 5632 of file gdi.h.

#define FONT_CHARSET_UTF16BE   "UTF-16BE"

UTF-16 encoding (Big-Endian) of UNICODE.

Definition at line 5688 of file gdi.h.

#define FONT_CHARSET_UTF16LE   "UTF-16LE"

UTF-16 encoding (Little-Endian) of UNICODE.

Definition at line 5682 of file gdi.h.

#define FONT_CHARSET_UTF8   "UTF-8"

UTF-8 encoding of UNICODE.

Definition at line 5676 of file gdi.h.

#define INV_LOGFONT   0

Invalid logfont.

Definition at line 5841 of file gdi.h.

Typedef Documentation

typedef const LOGFONT * CPLOGFONT

Data type of pointer to a const LOGFONT.

Definition at line 5732 of file gdi.h.

typedef struct _FONTMETRICS FONTMETRICS

The font metrics structure.

typedef struct _GLYPHBITMAP GLYPHBITMAP

The glyph bitmap structure.

typedef struct _LOGFONT LOGFONT

The logical font structure.

typedef LOGFONT * PLOGFONT

Data type of pointer to a LOGFONT.

Definition at line 5727 of file gdi.h.

typedef struct _WORDINFO WORDINFO

Date type of _WORDINFO.

Definition at line 5739 of file gdi.h.

Enumeration Type Documentation

List of values to identify various types of LCD filters, Note a freetype2 specific definition.

Enumerator
MG_SMOOTH_NONE 

equal to FT_LCD_FILTER_NONE

MG_SMOOTH_DEFAULT 

equal to FT_LCD_FILTER_DEFAULT

MG_SMOOTH_LIGHT 

equal to FT_LCD_FILTER_LIGHT

MG_SMOOTH_LEGACY 

equal to FT_LCD_FILTER_LEGACY

MG_SMOOTH_MAX 

equal to FT_LCD_FILTER_MAX

Definition at line 6178 of file gdi.h.

Function Documentation

PLOGFONT GUIAPI CreateLogFont ( const char *  type,
const char *  family,
const char *  charset,
char  weight,
char  slant,
char  flip,
char  other,
char  underline,
char  struckout,
int  size,
int  rotation 
)

Creates a logical font.

This function creates a logical font.

Parameters
typeThe type of the logical font, can be one of the values:
  • FONT_TYPE_NAME_BITMAP_RAW
    Creates a logical font by using raw bitmap device font, i.e. mono-space bitmap font.
  • FONT_TYPE_NAME_BITMAP_VAR
    Creates a logical font by using var-width bitmap device font.
  • FONT_TYPE_NAME_BITMAP_QPF
    Creates a logical font by using qpf device font.
  • FONT_TYPE_NAME_BITMAP_BMP
    Creates a logical font by using bitmap font.
  • FONT_TYPE_NAME_SCALE_TTF
    Creates a logical font by using scalable TrueType device font.
  • FONT_TYPE_NAME_SCALE_T1F
    Creates a logical font by using scalable Adobe Type1 device font.
  • FONT_TYPE_NAME_ALL
    Creates a logical font by using any type device font.
familyThe family of the logical font, such as "Courier", "Helvetica", and so on.
charsetThe charset of the logical font. You can specify a sigle-byte charset like "ISO8859-1", or a multi-byte charset like "GB2312-0".
weightThe weight of the logical font, can be one of the values:
  • FONT_WEIGHT_ALL
    Any one.
  • FONT_WEIGHT_REGULAR
    Regular font.
  • FONT_WEIGHT_BOLD
    Bold font.
  • FONT_WEIGHT_BOOK
    Anti-aliase font.
  • FONT_WEIGHT_LIGHT
    Draw the glyph border with the background color.
slantThe slant of the logical font, can be one of the values:
  • FONT_SLANT_ALL
    Any one.
  • FONT_SLANT_ROMAN
    Regular font.
  • FONT_SLANT_ITALIC
    Italic font.
flipDoes flip the glyph of the font, can be one of the following values:
  • FONT_FLIP_NIL
    Do not flip the glyph.
  • FONT_FLIP_HORZ
    Flip the glyph horizontally .
  • FONT_FLIP_VERT
    Flip the glyph vertically.
  • FONT_FLIP_HORZVERT
    Flip the glyph horizontally and vertically.
otherOther rendering features, can be one of the following values:
  • FONT_OTHER_NIL
    Not specified.
  • FONT_OTHER_AUTOSCALE
    Auto scale the bitmap glyph to match the desired font size.
  • FONT_OTHER_TTFNOCACHE
    Do not use cache when using TrueType font.
  • FONT_OTHER_TTFKERN
    Kern the glyph when using TrueType font.
  • FONT_OTHER_TTFNOCACHEKERN
    When using TrueType font, kern the glyph and do not use cache.
  • FONT_OTHER_LCDPORTRAIT
    When using TrueType font and sub-pixels smoothing strategy, set lcd portrait and do not use kern the glyph.
  • FONT_OTHER_LCDPORTRAITKERN
    When using TrueType font and sub-pixels smoothing strategy, set lcd portrait and use kern the glyph.
underlineThe underline of the logical font, can be one of the values:
  • FONT_UNDERLINE_ALL
    Any one.
  • FONT_UNDERLINE_LINE
    With underline.
  • FONT_UNDERLINE_NONE
    Without underline.
struckoutThe struckout line of the logical font, can be one of the values:
  • FONT_STRUCKOUT_ALL
    Any one.
  • FONT_STRUCKOUT_LINE
    With struckout line.
  • FONT_STRUCKOUT_NONE
    Without struckout line.
sizeThe size, i.e. the height, of the logical font. Note that the size of the created logical font may be different from the size expected.
rotationThe rotation of the logical font, it is in units of tenth degrees. Note that you can specify rotation only for TrueType and Adobe Type1 fonts.
Returns
The pointer to the logical font created, NULL on error.
See also
CreateLogFontIndirect, CreateLogFontByName, SelectFont

Example:

static LOGFONT *logfont, *logfontgb12, *logfontbig24;
logfont = CreateLogFont (NULL, "SansSerif", "ISO8859-1",
FONT_WEIGHT_REGULAR, FONT_SLANT_ITALIC, FONT_SETWIDTH_NORMAL,
FONT_SPACING_CHARCELL, FONT_UNDERLINE_NONE, FONT_STRUCKOUT_LINE,
16, 0);
logfontgb12 = CreateLogFont (NULL, "song", "GB2312",
FONT_WEIGHT_REGULAR, FONT_SLANT_ROMAN, FONT_SETWIDTH_NORMAL,
FONT_SPACING_CHARCELL, FONT_UNDERLINE_LINE, FONT_STRUCKOUT_LINE,
12, 0);
logfontbig24 = CreateLogFont (NULL, "ming", "BIG5",
FONT_WEIGHT_REGULAR, FONT_SLANT_ROMAN, FONT_SETWIDTH_NORMAL,
FONT_SPACING_CHARCELL, FONT_UNDERLINE_LINE, FONT_STRUCKOUT_NONE,
24, 0);
PLOGFONT GUIAPI CreateLogFontByName ( const char *  font_name)

Creates a logical font by a font name.

This function creates a logical font by a font name specified by font_name.

Parameters
font_nameThe name of the font.
Returns
The pointer to the logical font created, NULL on error.
See also
CreateLogFont, SelectFont
PLOGFONT GUIAPI CreateLogFontIndirect ( LOGFONT logfont)

Creates a logical font indirectly from a LOGFONT structure.

This function creates a logical font from information in a LOGFONT object.

Parameters
logfontThe pointer to the reference logical font structure.
Returns
The pointer to the logical font created, NULL on error.
See also
CreateLogFont, SelectFont
void GUIAPI DestroyDynamicDevFont ( DEVFONT **  devfont)

Destroy device font loaded dynamically from font file.

Parameters
devfontThe double pointer to DEVFONT structure. Note that the pointer must be the double pointer to device font loaded by LoadDevFontFromFile.
See also
LoadDevFontFromFile
void GUIAPI DestroyLogFont ( PLOGFONT  log_font)

Destroys a logical font.

This function destroys the specified logical font log_font.

Parameters
log_fontThe logical font will be destroied.
See also
CreateLogFont, CreateLogFontIndirect
BOOL ft2SetLcdFilter ( LOGFONT logfont,
mg_FT_LcdFilter  filter 
)

Set freetype2 smooth mode.

This function can be used to set freetype2 library handle font smooth mode.

Parameters
logfontThe logical font.
filterThe handle font smooth mode, it must be a value of mg_FT_LcdFilter.
Returns
TRUE on success, otherwise FALSE.
See also
mg_FT_LcdFilter
PLOGFONT GUIAPI GetCurFont ( HDC  hdc)

Gets the pointer to the current logical font of a DC.

This function returns the pointer to the current logical font selected to the DC hdc.

Parameters
hdcThe device context.
Returns
The pointer to the current logical font.
See also
GetLogFontInfo, SelectFont
void GUIAPI GetFontMetrics ( LOGFONT log_font,
FONTMETRICS font_metrics 
)

Gets metrics information of a logical font.

This function returns the font metrics information of the specified logical font log_font.

Parameters
log_fontThe pointer to the logical font.
font_metricsThe buffer receives the metrics information.
Returns
None.
See also
GetGlyphBitmap, FONTMETRICS
void GUIAPI GetGlyphBitmap ( LOGFONT log_font,
const char *  mchar,
int  mchar_len,
GLYPHBITMAP glyph_bitmap 
)

Gets the glyph bitmap information when uses a logical font to output a character.

This function gets the glyph bitmap of one multi-byte character (specified by mchar and mchar_len) and returns the bitmap information through font_bitmap when using log_font to render the character.

Parameters
log_fontThe logical font used to render the character.
mcharThe pointer to the multi-byte character.
mchar_lenThe length of the multi-byte character.
glyph_bitmapThe buffer receives the glyph bitmap information.
Returns
None.

Example:

1 GLYPHBITMAP glyph_bitmap = {0};
2 
3 GetGlyphBitmap (log_font, "A", 1, &glyph_bitmap);
See also
GetFontMetrics, GLYPHBITMAP
void GUIAPI GetLogFontInfo ( HDC  hdc,
LOGFONT log_font 
)

Gets logical font information of a DC.

This function gets the logical font information of the specified DC hdc, and copies to the LOGFONT structure pointed to by log_font.

Parameters
hdcThe device context.
log_fontThe pointer to the LOGFONT structure to save the logical font info.
See also
GetCurFont
const DEVFONT *GUIAPI GetNextDevFont ( const DEVFONT dev_font)

Get next devfont information.

This function can be used to enumerate all device fonts loaded by MiniGUI.

Parameters
dev_fontThe pointer to the current device font, can be NULL to get the first device font.
Returns
The next device font.
BOOL GUIAPI InitVectorialFonts ( void  )

Initializes vectorial font renderer.

This function initializes vectorial font renderer for MiniGUI-Processes application. For the performance reason, MiniGUI-Processes does not load vetorical fonts, such as TrueType or Adobe Type1, at startup. If you want to render text in vectorial fonts, you must call this function to initialize TrueType and Type1 font renderer.

Returns
TRUE on success, FALSE on error.
Note
Only defined for non-threads runmode. If your MiniGUI configured as MiniGUI-Threads, no need to initialize TrueType and Type1 font renderer explicitly.
See also
TermVectorialFonts
DEVFONT *GUIAPI LoadDevFontFromFile ( const char *  devfont_name,
const char *  file_name 
)

Load device font from font file.

This function can be used to load device font from font file.Now,it support free type font file and qpf font file.

Parameters
devfont_nameThe device font name.
file_nameThe font file name.
Returns
the pointer to the new device font on success, NULL on error.
See also
GetNextDevFont, DestroyDynamicDevFont
PLOGFONT GUIAPI SelectFont ( HDC  hdc,
PLOGFONT  log_font 
)

Selects a logical font into a DC.

This function selects the specified logical font log_font into the device context hdc.

Parameters
hdcThe device context.
log_fontThe pointer to the logical font to be selected into the DC.
Returns
The old logical font of the DC.
See also
GetCurFont

Example:

void OnModeDrawText (HDC hdc)
{
RECT rc1, rc2, rc3, rc4;
const char* szBuff1 = "This is a good day. \n"
"This text is drawn by calling DrawText.";
const char* szBuff2 = "This is a good day. \n"
"This text is drawn by calling DrawText.";
const char* szBuff3 = "Single line text, center.";
const char* szBuff4 =
"This text is drawn by calling DrawText.";
rc1.left = 1; rc1.top = 1; rc1.right = 401; rc1.bottom = 101;
rc2.left = 0; rc2.top = 110; rc2.right = 401; rc2.bottom = 351;
rc3.left = 0; rc3.top = 361; rc3.right = 401; rc3.bottom = 451;
rc4.left = 0; rc4.top = 461; rc4.right = 401; rc4.bottom = 551;
Rectangle (hdc, rc1.left, rc1.top, rc1.right, rc1.bottom);
Rectangle (hdc, rc2.left, rc2.top, rc2.right, rc2.bottom);
Rectangle (hdc, rc3.left, rc3.top, rc3.right, rc3.bottom);
Rectangle (hdc, rc4.left, rc4.top, rc4.right, rc4.bottom);
InflateRect (&rc1, -1, -1);
InflateRect (&rc2, -1, -1);
InflateRect (&rc3, -1, -1);
InflateRect (&rc4, -1, -1);
SelectFont (hdc, logfontgb12);
DrawText (hdc, szBuff1, -1, &rc1, DT_NOCLIP | DT_CENTER | DT_WORDBREAK);
SelectFont (hdc, logfontgb16);
DrawText (hdc, szBuff2, -1, &rc2, DT_NOCLIP | DT_RIGHT | DT_WORDBREAK);
SelectFont (hdc, logfontgb24);
DrawText (hdc, szBuff3, -1, &rc3, DT_NOCLIP | DT_SINGLELINE | DT_CENTER | DT_VCENTER);
SelectFont (hdc, logfontgb16);
DrawTextEx (hdc, szBuff4, -1, &rc4, 32, DT_NOCLIP | DT_LEFT | DT_WORDBREAK);
}
void GUIAPI TermVectorialFonts ( void  )

Terminates vectorial font renderer.

This function terminates the vectorial font renderer. When you are done with vectorial fonts, you should call this function to unload the vectorial fonts to save memory.

Note
Only defined for non-threads runmode.
See also
InitVectorialFonts