1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef SCI_GFX_FONT_H
#define SCI_GFX_FONT_H
#include "common/scummsys.h"
namespace Sci {
/** @name Font operations and stuctures */
/** @{ */
struct TextFragment {
const char *offset;
int length;
TextFragment() : offset(0), length(0) {}
TextFragment(const char *o) : offset(o), length(0) {}
};
/**
* Bitmap font information.
*/
struct gfx_bitmap_font_t {
int ID; /**< Unique resource ID */
int chars_nr; /**< Numer of available characters */
int *widths; /**< chars_nr character widths, in pixels */
int row_size; /**
* Byte size of each pixel row. For unscaled fonts,
* this is always 1, 2, or 4. Otherwise, it's a
* multiple of 4.
*/
int line_height; /**
* Height of each text line (usually identical to
* height)
*/
int height; /**< Height for all characters, in pixel rows */
int char_size; /**
* Amount of memory occupied by one character
* in data
*/
byte *data; /**
* Font data, consisting of 'chars_nr' entries
* of 'height' rows of 'row_size' bytes. For each
* character ch, its first byte (the topmost row)
* is located at (data + (charsize * ch)), and its
* pixel width is widths[ch], provided that
* (ch < chars_nr).
*/
};
/**
* Font handling flags.
*
* SCI0, SCI01 and SCI1 all use the same font format.
*/
enum fontFlags {
kFontNoNewlines = 1 << 0, ///< Don't treat newline characters
kFontIgnoreLF = 1 << 1 ///< Interpret CR LF sequences as a single newline, rather than two
};
/**
* Generates a bitmap font data structure from a resource.
*
* @param[in] id Resource ID of the resulting font
* @param[in] resource Pointer to the resource data
* @param[in] size Size of the resource block
* @return The resulting font structure, or NULL on error
*/
gfx_bitmap_font_t *gfxr_read_font(int id, byte *resource, int size);
/**
* Frees a previously allocated font structure.
*
* @param font The font to free
*/
void gfxr_free_font(gfx_bitmap_font_t *font);
/**
* Calculates the size that would be occupied by drawing a specified
* text.
*
* This function assumes 320x200 mode.
*
* @param[in] font The font to calculate with
* @param[in] max_width Maximum pixel width allowed for the output
* @param[in] text The text to calculate for
* @param[in] flags Any text formatting flags
* @param[out] fragments A newly allocated array of text_fragments,
* containing the start and size of each string
* segment.
* @param[out] width The resulting width
* @param[out] height The resulting height
* @param[out] line_height Pixel height of a single line of text
* @param[out] last_offset Pixel offset after the last drawn line
* @return true if successful, false otherwise
*/
bool gfxr_font_calculate_size(Common::Array<TextFragment> &fragments,
gfx_bitmap_font_t *font, int max_width, const char *text,
int *width, int *height, int *line_height, int *last_offset, int flags);
/**
* Draws text in a specific font to a pixmap.
*
* The results are written to the pixmap's index buffer. Contents of the
* foreground and background fields are copied into a newly allocated font
* structure, so that the pixmap may be translated directly. If any of the
* colors is null, it will be assumed to be transparent.
* In color index mode, the specified colors have to be preallocated.
*
* @param[in] font The font to use for drawing
* @param[in] text The start of the text to draw
* @param[in] characters The number of characters to draw
* @param[in] fg0 The first foreground color
* @param[in] fg1 The second foreground color
* @param[in] bg The background color
* @return The result pixmap, or NULL on error
*/
gfx_pixmap_t *gfxr_draw_font(gfx_bitmap_font_t *font, const char *text,
int characters, PaletteEntry *fg0, PaletteEntry *fg1,
PaletteEntry *bg);
/** @} */
} // End of namespace Sci
#endif // SCI_GFX_FONT_H
|
