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Added tgi_load_vectorfont(). Fixed tgi_free_vectorfont().

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4421 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2009-11-01 22:35:22 +00:00
parent 25ccbeeaa8
commit 2e5281fa2d
3 changed files with 135 additions and 2 deletions
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3
libsrc/tgi/Makefile
View file

@ -30,7 +30,8 @@ CFLAGS = -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
# Object files
C_OBJS = tgi_load.o \
tgi_load_driver.o
tgi_load_driver.o \
tgi_load_vectorfont.o
S_OBJS = tgi-kernel.o \
tgi_bar.o \

3
libsrc/tgi/tgi_free_vectorfont.s
View file

@ -7,5 +7,6 @@
; This function is identical to free(void*)
;
.export _tgi_free_vectorfont := free
.import _free
.export _tgi_free_vectorfont := _free

131
libsrc/tgi/tgi_load_vectorfont.c Normal file
View file

@ -0,0 +1,131 @@
/*****************************************************************************/
/* */
/* tgi_load_vectorfont.c */
/* */
/* Loader module for TGI vector font files */
/* */
/* */
/* */
/* (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. */
/* */
/*****************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <tgi.h>
#include <tgi/tgi-kernel.h>
#include <tgi/tgi-vectorfont.h>
/*****************************************************************************/
/* Code */
/*****************************************************************************/
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.
* To use the font, it has to be installed using tgi_install_vectorfont.
*/
{
static const char Magic[4] = {
0x54, 0x43, 0x48, TGI_VF_VERSION
};
tgi_vectorfont_header H;
int F;
tgi_vectorfont* Font = 0;
unsigned V;
unsigned char I;
/* Open the file */
F = open (name, O_RDONLY);
if (F < 0) {
/* Cannot open file */
goto LoadError;
}
/* Read the header */
if (read (F, &H, sizeof (H)) != sizeof (H)) {
/* Cannot read header bytes */
goto LoadError;
}
/* Check the header */
if (memcmp (&H, Magic, sizeof (Magic)) != 0) {
/* Header magic not ok */
goto LoadError;
}
/* Allocate memory for the data */
Font = malloc (H.size);
if (Font == 0) {
/* Out of memory */
goto LoadError;
}
/* Read the whole font file into the buffer */
if (read (F, Font, H.size) != H.size) {
/* Problem reading font data */
free (Font);
goto LoadError;
}
/* Close the file */
close (F);
/* Fix the offset pointers. When loaded, they contain numeric offsets
* into the VectorOps, with the start of the VectorOps at offset zero.
* We will add a pointer to the VectorOps to make them actual pointers
* that may be used independently from anything else.
*/
V = (unsigned) &Font->vec_ops;
for (I = 0; I < TGI_VF_CCOUNT; ++I) {
Font->chars[I] += V;
}
/* Return the vector font loaded */
return Font;
LoadError:
/* Some sort of load problem. If the file is still open, be sure to
* close it
*/
if (F >= 0) {
close (F);
}
tgi_error = TGI_ERR_CANNOT_LOAD;
return 0;
}