xrdp/fontutils/fv1.h

101 lines
2.5 KiB
C

/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2004-2022
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file fontutils/fv1.h
* @brief Definitions relating to fv1 font files
*/
#if !defined(FV1_H)
#define FV1_H
struct list;
#define FV1_DEVICE_DPI 96
#define FV1_MIN_CHAR 0x20 /* First character value in file */
#define FV1_MIN_FILE_SIZE 48
#define FV1_MAX_FILE_SIZE (10 * 1024 * 1024)
#define FV1_MAX_FONT_NAME_SIZE 32
#define FV1_MAX_GLYPH_DATASIZE 512
struct fv1_glyph
{
unsigned short width; /* Width of glyph */
unsigned short height; /* Height of glyph */
short baseline; /* Offset from cursor pos to 1st row of glyph */
short offset; /* Space before glyph (can be -ve) */
unsigned short inc_by; /* Total width of glyph + spacing */
/* Standard C++ does not yet support C99 flexible array members */
#ifdef __cplusplus
unsigned char data[1];
#else
unsigned char data[];
#endif
};
struct fv1_file
{
char font_name[FV1_MAX_FONT_NAME_SIZE + 1];
short point_size; /* Input point size (for reference) */
short style;
short body_height; /* Body height (pixels) */
short min_descender; /* Min descender of the glyphs in the font */
struct list *glyphs; /* Glyphs are struct fv1_glyph * */
};
/**
* Get a glyph pointer for a unicode character
*/
#define FV1_GET_GLYPH(fv1,ucode) \
(((ucode) < FV1_MIN_CHAR) \
? NULL \
: (struct fv1_glyph *)list_get_item(fv1->glyphs, (ucode) - FV1_MIN_CHAR))
/**
* First glyph not in file
*/
#define FV1_GLYPH_END(fv1) (fv1->glyphs->count + FV1_MIN_CHAR)
struct fv1_file *
fv1_file_load(const char *filename);
void
fv1_file_free(struct fv1_file *);
struct fv1_file *
fv1_file_create(void);
struct fv1_glyph *
fv1_alloc_glyph(int ucode, /* Unicode character for error reporting if known */
unsigned short width,
unsigned short height);
enum fv1_realloc_mode
{
FV1_AT_TOP,
FV1_AT_BOTTOM
};
int
fv1_file_save(const struct fv1_file *fv1, const char *filename);
#endif