2 * ***** BEGIN GPL LICENSE BLOCK *****
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * The Original Code is Copyright (C) 2009 Blender Foundation.
19 * All rights reserved.
22 * Contributor(s): Blender Foundation
24 * ***** END GPL LICENSE BLOCK *****
27 /** \file blender/blenfont/BLF_api.h
35 #include "BLI_compiler_attrs.h"
36 #include "BLI_sys_types.h"
38 /* enable this only if needed (unused circa 2016) */
39 #define BLF_BLUR_ENABLE 0
42 struct ColorManagedDisplay;
47 void BLF_default_dpi(int dpi);
48 void BLF_default_set(int fontid);
49 int BLF_default(void); /* get default font ID so we can pass it to other functions */
50 void BLF_batch_reset(void); /* call when changing opengl context. */
52 void BLF_cache_clear(void);
54 int BLF_load(const char *name) ATTR_NONNULL();
55 int BLF_load_mem(const char *name, const unsigned char *mem, int mem_size) ATTR_NONNULL();
57 int BLF_load_unique(const char *name) ATTR_NONNULL();
58 int BLF_load_mem_unique(const char *name, const unsigned char *mem, int mem_size) ATTR_NONNULL();
60 void BLF_unload(const char *name) ATTR_NONNULL();
61 void BLF_unload_id(int fontid);
63 /* Attach a file with metrics information from memory. */
64 void BLF_metrics_attach(int fontid, unsigned char *mem, int mem_size);
66 void BLF_aspect(int fontid, float x, float y, float z);
67 void BLF_position(int fontid, float x, float y, float z);
68 void BLF_size(int fontid, int size, int dpi);
70 /* goal: small but useful color API */
71 void BLF_color4ubv(int fontid, const unsigned char rgba[4]);
72 void BLF_color3ubv(int fontid, const unsigned char rgb[3]);
73 void BLF_color3ubv_alpha(int fontid, const unsigned char rgb[3], unsigned char alpha);
74 void BLF_color3ub(int fontid, unsigned char r, unsigned char g, unsigned char b);
75 void BLF_color4f(int fontid, float r, float g, float b, float a);
76 void BLF_color4fv(int fontid, const float rgba[4]);
77 void BLF_color3f(int fontid, float r, float g, float b);
78 void BLF_color3fv_alpha(int fontid, const float rgb[3], float alpha);
79 /* also available: UI_FontThemeColor(fontid, colorid) */
81 /* Set a 4x4 matrix to be multiplied before draw the text.
82 * Remember that you need call BLF_enable(BLF_MATRIX)
85 * The order of the matrix is like GL:
87 * | m[0] m[4] m[8] m[12] |
88 * | m[1] m[5] m[9] m[13] |
89 * | m[2] m[6] m[10] m[14] |
90 * | m[3] m[7] m[11] m[15] |
93 void BLF_matrix(int fontid, const float m[16]);
95 /* Batch drawcalls together as long as
96 * the modelview matrix and the font remain unchanged. */
97 void BLF_batch_draw_begin(void);
98 void BLF_batch_draw_flush(void);
99 void BLF_batch_draw_end(void);
101 /* Draw the string using the default font, size and dpi. */
102 void BLF_draw_default(float x, float y, float z, const char *str, size_t len) ATTR_NONNULL();
103 void BLF_draw_default_ascii(float x, float y, float z, const char *str, size_t len) ATTR_NONNULL();
105 /* Set size and DPI, and return default font ID. */
106 int BLF_set_default(void);
108 /* Draw the string using the current font. */
109 void BLF_draw_ex(int fontid, const char *str, size_t len, struct ResultBLF *r_info) ATTR_NONNULL(2);
110 void BLF_draw(int fontid, const char *str, size_t len) ATTR_NONNULL(2);
111 void BLF_draw_ascii_ex(int fontid, const char *str, size_t len, struct ResultBLF *r_info) ATTR_NONNULL(2);
112 void BLF_draw_ascii(int fontid, const char *str, size_t len) ATTR_NONNULL(2);
113 int BLF_draw_mono(int fontid, const char *str, size_t len, int cwidth) ATTR_NONNULL(2);
115 /* Get the string byte offset that fits within a given width */
116 size_t BLF_width_to_strlen(int fontid, const char *str, size_t len, float width, float *r_width) ATTR_NONNULL(2);
117 /* Same as BLF_width_to_strlen but search from the string end */
118 size_t BLF_width_to_rstrlen(int fontid, const char *str, size_t len, float width, float *r_width) ATTR_NONNULL(2);
120 /* This function return the bounding box of the string
121 * and are not multiplied by the aspect.
123 void BLF_boundbox_ex(int fontid, const char *str, size_t len, struct rctf *box, struct ResultBLF *r_info) ATTR_NONNULL(2);
124 void BLF_boundbox(int fontid, const char *str, size_t len, struct rctf *box) ATTR_NONNULL();
126 /* The next both function return the width and height
127 * of the string, using the current font and both value
128 * are multiplied by the aspect of the font.
130 float BLF_width_ex(int fontid, const char *str, size_t len, struct ResultBLF *r_info) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(2);
131 float BLF_width(int fontid, const char *str, size_t len) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
132 float BLF_height_ex(int fontid, const char *str, size_t len, struct ResultBLF *r_info) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(2);
133 float BLF_height(int fontid, const char *str, size_t len) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
135 /* Return dimensions of the font without any sample text. */
136 int BLF_height_max(int fontid) ATTR_WARN_UNUSED_RESULT;
137 float BLF_width_max(int fontid) ATTR_WARN_UNUSED_RESULT;
138 float BLF_descender(int fontid) ATTR_WARN_UNUSED_RESULT;
139 float BLF_ascender(int fontid) ATTR_WARN_UNUSED_RESULT;
141 /* The following function return the width and height of the string, but
142 * just in one call, so avoid extra freetype2 stuff.
144 void BLF_width_and_height(int fontid, const char *str, size_t len, float *r_width, float *r_height) ATTR_NONNULL();
146 /* For fixed width fonts only, returns the width of a
149 float BLF_fixed_width(int fontid) ATTR_WARN_UNUSED_RESULT;
151 /* By default, rotation and clipping are disable and
152 * have to be enable/disable using BLF_enable/disable.
154 void BLF_rotation(int fontid, float angle);
155 void BLF_clipping(int fontid, float xmin, float ymin, float xmax, float ymax);
156 void BLF_wordwrap(int fontid, int wrap_width);
159 void BLF_blur(int fontid, int size);
162 void BLF_enable(int fontid, int option);
163 void BLF_disable(int fontid, int option);
165 /* Shadow options, level is the blur level, can be 3, 5 or 0 and
166 * the other argument are the rgba color.
167 * Take care that shadow need to be enable using BLF_enable!!!
169 void BLF_shadow(int fontid, int level, const float rgba[4]) ATTR_NONNULL(3);
171 /* Set the offset for shadow text, this is the current cursor
172 * position plus this offset, don't need call BLF_position before
173 * this function, the current position is calculate only on
174 * BLF_draw, so it's safe call this whenever you like.
176 void BLF_shadow_offset(int fontid, int x, int y);
178 /* Set the buffer, size and number of channels to draw, one thing to take care is call
179 * this function with NULL pointer when we finish, for example:
181 * BLF_buffer(my_fbuf, my_cbuf, 100, 100, 4, true, NULL);
183 * ... set color, position and draw ...
185 * BLF_buffer(NULL, NULL, NULL, 0, 0, false, NULL);
187 void BLF_buffer(int fontid, float *fbuf, unsigned char *cbuf, int w, int h, int nch, struct ColorManagedDisplay *display);
189 /* Set the color to be used for text. */
190 void BLF_buffer_col(int fontid, const float rgba[4]) ATTR_NONNULL(2);
192 /* Draw the string into the buffer, this function draw in both buffer, float and unsigned char _BUT_
193 * it's not necessary set both buffer, NULL is valid here.
195 void BLF_draw_buffer_ex(int fontid, const char *str, size_t len, struct ResultBLF *r_info) ATTR_NONNULL(2);
196 void BLF_draw_buffer(int fontid, const char *str, size_t len) ATTR_NONNULL(2);
198 /* Add a path to the font dir paths. */
199 void BLF_dir_add(const char *path) ATTR_NONNULL();
201 /* Remove a path from the font dir paths. */
202 void BLF_dir_rem(const char *path) ATTR_NONNULL();
204 /* Return an array with all the font dir (this can be used for filesel) */
205 char **BLF_dir_get(int *ndir) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
207 /* Free the data return by BLF_dir_get. */
208 void BLF_dir_free(char **dirs, int count) ATTR_NONNULL();
211 void BLF_thumb_preview(
212 const char *filename, const char **draw_str, const unsigned char draw_str_lines,
213 const float font_color[4], const int font_size,
214 unsigned char *buf, int w, int h, int channels) ATTR_NONNULL();
217 unsigned char *BLF_get_unifont(int *unifont_size);
218 void BLF_free_unifont(void);
219 unsigned char *BLF_get_unifont_mono(int *unifont_size);
220 void BLF_free_unifont_mono(void);
223 void BLF_state_print(int fontid);
227 #define BLF_ROTATION (1 << 0)
228 #define BLF_CLIPPING (1 << 1)
229 #define BLF_SHADOW (1 << 2)
230 #define BLF_KERNING_DEFAULT (1 << 3)
231 #define BLF_MATRIX (1 << 4)
232 #define BLF_ASPECT (1 << 5)
233 #define BLF_WORD_WRAP (1 << 6)
234 #define BLF_MONOCHROME (1 << 7) /* no-AA */
235 #define BLF_HINTING_NONE (1 << 8)
236 #define BLF_HINTING_SLIGHT (1 << 9)
237 #define BLF_HINTING_FULL (1 << 10)
239 #define BLF_DRAW_STR_DUMMY_MAX 1024
241 /* XXX, bad design */
242 extern int blf_mono_font;
243 extern int blf_mono_font_render; /* don't mess drawing with render threads. */
246 * Result of drawing/evaluating the string
250 * Number of lines drawn when #BLF_WORD_WRAP is enabled (both wrapped and `\n` newline).
254 * The 'cursor' position on completion (ignoring character boundbox).
259 #endif /* __BLF_API_H__ */