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Preparations for use of vectorfonts.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4414 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2009-11-01 21:49:09 +00:00
parent 23c96f81c0
commit 944749e07f
2 changed files with 102 additions and 1 deletions
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27
include/tgi.h
View File

@ -53,7 +53,15 @@
/* Constants used for tgi_textstyle */
/* Color constants */
#define TGI_COLOR_BLACK 0
#define TGI_COLOR_WHITE 1
/* Font constants for use with tgi_textstyle */
#define TGI_FONT_BITMAP 0
#define TGI_FONT_VECTOR 1
/* Direction constants for use with tgi_textstyle */
#define TGI_TEXT_HORIZONTAL 0
#define TGI_TEXT_VERTICAL 1
@ -63,6 +71,9 @@ extern const char tgi_stddrv[];
/* The default tgi mode for a platform */
extern const unsigned char tgi_stdmode;
/* A vector font definition */
typedef struct tgi_vectorfont tgi_vectorfont;
/*****************************************************************************/
@ -104,6 +115,20 @@ void __fastcall__ tgi_done (void);
* the driver!
*/
const tgi_vectorfont* __fastcall__ tgi_load_vectorfont (const char* name);
/* Load a vector font into memory and return it. In case of errors, NULL is
* returned and an error is set, which can be retrieved using tgi_geterror.
*/
void __fastcall__ tgi_register_vectorfont (const tgi_vectorfont* font);
/* Register a vector font for use. More than one vector font can be loaded,
* but only one can be active. This function is used to tell which one. Call
* with a NULL pointer to unregister the currently registered font.
*/
void tgi_free_vectorfont (const tgi_vectorfont* font);
/* Free a vector font that was previously loaded. */
unsigned char __fastcall__ tgi_geterror (void);
/* Return the error code for the last operation. This will also clear the
* error.

76
include/tgi/tgi-vectorfont.h Normal file
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@ -0,0 +1,76 @@
/*****************************************************************************/
/* */
/* tgi-vectorfont.h */
/* */
/* TGI vector font definitions */
/* */
/* */
/* */
/* (C) 2009, Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef _TGI_VECTORFONT_H
#define _TGI_VECTORFONT_H
/*****************************************************************************/
/* Data */
/*****************************************************************************/
#define TGI_VF_FIRSTCHAR 0x20 /* First char in file */
#define TGI_VF_LASTCHAR 0x7E /* Last char in file */
#define TGI_VF_CCOUNT (TGI_VF_LASTCHAR - TGI_VF_FIRSTCHAR + 1)
#define TGI_VF_VERSION 0x00 /* File version number */
/* TCH file header */
struct tgi_vectorfont_header {
unsigned char magic[3]; /* "TCH" */
unsigned char version; /* Version number */
unsigned size; /* Font data size */
};
/* Font data loaded directly from file */
struct tgi_vectorfont {
unsigned char top; /* Height of char */
unsigned char baseline; /* Character baseline */
unsigned char bottom; /* Descender */
unsigned char widths[TGI_VF_CCOUNT]; /* Char widths */
unsigned char* chars[TGI_VF_CCOUNT]; /* Pointer to character defs */
unsigned char vec_ops[1]; /* Actually dynamic */
};
/* End of tgi-vectorfont.h */
#endif