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/******************************************************************************
*
* Copyright (c) 1994-1999 Palm Computing, Inc. or its subsidiaries.
* All rights reserved.
*
* File: Font.h
*
* Description:
* This file defines font structures and routines.
*
* History:
* September 13, 1994 Created by Art Lamb
* 05/05/98 art Add structures for font mapping table.
* 07/03/98 kwk Added FntWidthToOffset.
* 10/23/98 kwk Changed fontMapTable to 0xC000 (was 0xFFFF).
* 10/20/99 kwk Moved private values to FontPrv.h
*
*****************************************************************************/
#ifndef __FONT_H__
#define __FONT_H__
#include <PalmTypes.h>
#include <CoreTraps.h>
// Pixel width of tab stops in fields
#define fntTabChrWidth 20
// Width of character missing from font.
#define fntMissingChar -1
typedef struct {
Int8 offset;
Int8 width;
} FontCharInfoType, * FontCharInfoPtr;
typedef struct {
Int16 fontType; // font type
Int16 firstChar; // ASCII code of first character
Int16 lastChar; // ASCII code of last character
Int16 maxWidth; // maximum character width
Int16 kernMax; // negative of maximum character kern
Int16 nDescent; // negative of descent
Int16 fRectWidth; // width of font rectangle
Int16 fRectHeight; // height of font rectangle
Int16 owTLoc; // offset to offset/width table
Int16 ascent; // ascent
Int16 descent; // descent
Int16 leading; // leading
Int16 rowWords; // row width of bit image / 2
} FontType;
typedef FontType *FontPtr;
typedef FontPtr *FontTablePtr;
enum fontID {
stdFont = 0x00, // Small font used for the user's writing. Shows a good amount
boldFont, // Small font. Bold for easier reading. Used often for ui.
largeFont, // Larger font for easier reading. Shows a lot less.
symbolFont, // Various ui images like check boxes and arrows
symbol11Font, // Larger various ui images
symbol7Font, // Smaller various ui images
ledFont, // Calculator specific font
largeBoldFont, // A thicker version of the large font. More readable.
fntAppFontCustomBase = 0x80 // First available application-defined font ID
};
typedef enum fontID FontID;
#define checkboxFont symbol11Font
#define FntIsAppDefined(fnt) (fnt >= fntAppFontCustomBase)
//--------------------------------------------------------------------
//
// Font Function
//
//--------------------------------------------------------------------
#ifdef REMOVE_FOR_EMULATOR
#ifdef __cplusplus
extern "C" {
#endif
FontID FntGetFont (void)
SYS_TRAP(sysTrapFntGetFont);
FontID FntSetFont (FontID font)
SYS_TRAP(sysTrapFntSetFont);
FontPtr FntGetFontPtr (void)
SYS_TRAP(sysTrapFntGetFontPtr);
Int16 FntBaseLine (void)
SYS_TRAP(sysTrapFntBaseLine);
Int16 FntCharHeight (void)
SYS_TRAP(sysTrapFntCharHeight);
Int16 FntLineHeight (void)
SYS_TRAP(sysTrapFntLineHeight);
Int16 FntAverageCharWidth (void)
SYS_TRAP(sysTrapFntAverageCharWidth);
Int16 FntCharWidth (Char ch)
SYS_TRAP(sysTrapFntCharWidth);
Int16 FntCharsWidth (Char const *chars, Int16 len)
SYS_TRAP(sysTrapFntCharsWidth);
Int16 FntWidthToOffset (Char const *pChars, UInt16 length,
Int16 pixelWidth, Boolean *leadingEdge, Int16 *truncWidth)
SYS_TRAP(sysTrapFntWidthToOffset);
void FntCharsInWidth (Char const *string,
Int16 *stringWidthP, Int16 *stringLengthP,
Boolean *fitWithinWidth)
SYS_TRAP(sysTrapFntCharsInWidth);
Int16 FntDescenderHeight (void)
SYS_TRAP(sysTrapFntDescenderHeight);
Int16 FntLineWidth (Char const *pChars, UInt16 length)
SYS_TRAP(sysTrapFntLineWidth);
UInt16 FntWordWrap (Char const *chars, UInt16 maxWidth)
SYS_TRAP(sysTrapFntWordWrap);
void FntWordWrapReverseNLines (Char const *const chars,
UInt16 maxWidth, UInt16 *linesToScrollP, UInt16 *scrollPosP)
SYS_TRAP(sysTrapFntWordWrapReverseNLines);
void FntGetScrollValues (Char const *chars, UInt16 width,
UInt16 scrollPos, UInt16 *linesP, UInt16 *topLine)
SYS_TRAP(sysTrapFntGetScrollValues);
Err FntDefineFont (FontID font, FontPtr fontP)
SYS_TRAP(sysTrapFntDefineFont);
#ifdef __cplusplus
}
#endif
#endif
#endif // __FONT_H__
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