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Functions
sgr.h File Reference
video » Video to ASCII Conversion

ANSI SGR (Select Graphic Rendition) color sequence generation. More...

Go to the source code of this file.

Functions

void prewarm_sgr256_fg_cache (void)
 Prewarm 256-color foreground cache for benchmarks.
 
void prewarm_sgr256_cache (void)
 Prewarm 256-color foreground/background cache for benchmarks.
 
char * get_sgr256_fg_string (uint8_t fg, uint8_t *len_out)
 Get 256-color foreground ANSI sequence string.
 
char * get_sgr256_bg_string (uint8_t bg, uint8_t *len_out)
 Get 256-color background ANSI sequence string.
 
char * get_sgr256_fg_bg_string (uint8_t fg, uint8_t bg, uint8_t *len_out)
 Get 256-color foreground/background ANSI sequence string.
 
char * append_sgr_reset (char *dst)
 
char * append_sgr_truecolor_fg (char *dst, uint8_t r, uint8_t g, uint8_t b)
 
char * append_sgr_truecolor_bg (char *dst, uint8_t r, uint8_t g, uint8_t b)
 
char * append_sgr_truecolor_fg_bg (char *dst, uint8_t fr, uint8_t fg, uint8_t fb, uint8_t br, uint8_t bg, uint8_t bb)
 

Detailed Description

ANSI SGR (Select Graphic Rendition) color sequence generation.

Definition in file sgr.h.

Function Documentation

◆ append_sgr_reset()

char * append_sgr_reset ( char *  dst)
inline

Definition at line 156 of file sgr.c.

156 {
157 // "\x1b[0m"
158 static const char RESET[] = "\033[0m";
159 memcpy(dst, RESET, sizeof(RESET) - 1);
160 return dst + (sizeof(RESET) - 1);
161}

◆ append_sgr_truecolor_bg()

char * append_sgr_truecolor_bg ( char *  dst,
uint8_t  r,
uint8_t  g,
uint8_t  b 
)
inline

Definition at line 225 of file sgr.c.

225 {
226 // Constructor ensures initialization
227
228 // Direct character writes for "\033[48;2;"
229 *dst++ = '\033';
230 *dst++ = '[';
231 *dst++ = '4';
232 *dst++ = '8';
233 *dst++ = ';';
234 *dst++ = '2';
235 *dst++ = ';';
236
237 // Optimized digit copying
238 const dec3_t *rd = &g_dec3_cache.dec3_table[r];
239 if (rd->len == 1) {
240 *dst++ = rd->s[0];
241 } else if (rd->len == 2) {
242 dst[0] = rd->s[0];
243 dst[1] = rd->s[1];
244 dst += 2;
245 } else {
246 dst[0] = rd->s[0];
247 dst[1] = rd->s[1];
248 dst[2] = rd->s[2];
249 dst += 3;
250 }
251 *dst++ = ';';
252
253 const dec3_t *gd = &g_dec3_cache.dec3_table[g];
254 if (gd->len == 1) {
255 *dst++ = gd->s[0];
256 } else if (gd->len == 2) {
257 dst[0] = gd->s[0];
258 dst[1] = gd->s[1];
259 dst += 2;
260 } else {
261 dst[0] = gd->s[0];
262 dst[1] = gd->s[1];
263 dst[2] = gd->s[2];
264 dst += 3;
265 }
266 *dst++ = ';';
267
268 const dec3_t *bd = &g_dec3_cache.dec3_table[b];
269 if (bd->len == 1) {
270 *dst++ = bd->s[0];
271 } else if (bd->len == 2) {
272 dst[0] = bd->s[0];
273 dst[1] = bd->s[1];
274 dst += 2;
275 } else {
276 dst[0] = bd->s[0];
277 dst[1] = bd->s[1];
278 dst[2] = bd->s[2];
279 dst += 3;
280 }
281 *dst++ = 'm';
282 return dst;
283}
g_dec3_cache
global_dec3_cache_t g_dec3_cache
Global decimal cache instance.
Definition video/ascii/common.c:37
global_dec3_cache_t::dec3_table
dec3_t dec3_table[256]
Definition video/ascii/common.h:106
dec3_t::len
uint8_t len
Definition video/ascii/common.h:96
dec3_t::s
char s[3]
Definition video/ascii/common.h:97
dec3_t
Decimal conversion cache structure (1-3 digits)
Definition video/ascii/common.h:95

References global_dec3_cache_t::dec3_table, g_dec3_cache, dec3_t::len, and dec3_t::s.

◆ append_sgr_truecolor_fg()

char * append_sgr_truecolor_fg ( char *  dst,
uint8_t  r,
uint8_t  g,
uint8_t  b 
)
inline

Definition at line 164 of file sgr.c.

164 {
165 // Constructor ensures initialization
166
167 // Direct character writes (compiler will optimize to word operations)
168 *dst++ = '\033';
169 *dst++ = '[';
170 *dst++ = '3';
171 *dst++ = '8';
172 *dst++ = ';';
173 *dst++ = '2';
174 *dst++ = ';';
175
176 // Fast digit copying for 1-3 digit numbers (avoid memcpy overhead)
177 const dec3_t *rd = &g_dec3_cache.dec3_table[r];
178 if (rd->len == 1) {
179 *dst++ = rd->s[0];
180 } else if (rd->len == 2) {
181 dst[0] = rd->s[0];
182 dst[1] = rd->s[1];
183 dst += 2;
184 } else {
185 dst[0] = rd->s[0];
186 dst[1] = rd->s[1];
187 dst[2] = rd->s[2];
188 dst += 3;
189 }
190 *dst++ = ';';
191
192 const dec3_t *gd = &g_dec3_cache.dec3_table[g];
193 if (gd->len == 1) {
194 *dst++ = gd->s[0];
195 } else if (gd->len == 2) {
196 dst[0] = gd->s[0];
197 dst[1] = gd->s[1];
198 dst += 2;
199 } else {
200 dst[0] = gd->s[0];
201 dst[1] = gd->s[1];
202 dst[2] = gd->s[2];
203 dst += 3;
204 }
205 *dst++ = ';';
206
207 const dec3_t *bd = &g_dec3_cache.dec3_table[b];
208 if (bd->len == 1) {
209 *dst++ = bd->s[0];
210 } else if (bd->len == 2) {
211 dst[0] = bd->s[0];
212 dst[1] = bd->s[1];
213 dst += 2;
214 } else {
215 dst[0] = bd->s[0];
216 dst[1] = bd->s[1];
217 dst[2] = bd->s[2];
218 dst += 3;
219 }
220 *dst++ = 'm';
221 return dst;
222}

References global_dec3_cache_t::dec3_table, g_dec3_cache, dec3_t::len, and dec3_t::s.

◆ append_sgr_truecolor_fg_bg()

char * append_sgr_truecolor_fg_bg ( char *  dst,
uint8_t  fr,
uint8_t  fg,
uint8_t  fb,
uint8_t  br,
uint8_t  bg,
uint8_t  bb 
)
inline

Definition at line 286 of file sgr.c.

287 {
288 // Constructor ensures initialization
289
290 // Write "\033[38;2;" directly (7 chars)
291 *dst++ = '\033';
292 *dst++ = '[';
293 *dst++ = '3';
294 *dst++ = '8';
295 *dst++ = ';';
296 *dst++ = '2';
297 *dst++ = ';';
298
299 // Foreground RGB digits
300 const dec3_t *d = &g_dec3_cache.dec3_table[fr];
301 if (d->len == 1) {
302 *dst++ = d->s[0];
303 } else if (d->len == 2) {
304 dst[0] = d->s[0];
305 dst[1] = d->s[1];
306 dst += 2;
307 } else {
308 dst[0] = d->s[0];
309 dst[1] = d->s[1];
310 dst[2] = d->s[2];
311 dst += 3;
312 }
313 *dst++ = ';';
314
315 d = &g_dec3_cache.dec3_table[fg];
316 if (d->len == 1) {
317 *dst++ = d->s[0];
318 } else if (d->len == 2) {
319 dst[0] = d->s[0];
320 dst[1] = d->s[1];
321 dst += 2;
322 } else {
323 dst[0] = d->s[0];
324 dst[1] = d->s[1];
325 dst[2] = d->s[2];
326 dst += 3;
327 }
328 *dst++ = ';';
329
330 d = &g_dec3_cache.dec3_table[fb];
331 if (d->len == 1) {
332 *dst++ = d->s[0];
333 } else if (d->len == 2) {
334 dst[0] = d->s[0];
335 dst[1] = d->s[1];
336 dst += 2;
337 } else {
338 dst[0] = d->s[0];
339 dst[1] = d->s[1];
340 dst[2] = d->s[2];
341 dst += 3;
342 }
343
344 // Write ";48;2;" directly (6 chars)
345 *dst++ = ';';
346 *dst++ = '4';
347 *dst++ = '8';
348 *dst++ = ';';
349 *dst++ = '2';
350 *dst++ = ';';
351
352 // Background RGB digits
353 d = &g_dec3_cache.dec3_table[br];
354 if (d->len == 1) {
355 *dst++ = d->s[0];
356 } else if (d->len == 2) {
357 dst[0] = d->s[0];
358 dst[1] = d->s[1];
359 dst += 2;
360 } else {
361 dst[0] = d->s[0];
362 dst[1] = d->s[1];
363 dst[2] = d->s[2];
364 dst += 3;
365 }
366 *dst++ = ';';
367
368 d = &g_dec3_cache.dec3_table[bg];
369 if (d->len == 1) {
370 *dst++ = d->s[0];
371 } else if (d->len == 2) {
372 dst[0] = d->s[0];
373 dst[1] = d->s[1];
374 dst += 2;
375 } else {
376 dst[0] = d->s[0];
377 dst[1] = d->s[1];
378 dst[2] = d->s[2];
379 dst += 3;
380 }
381 *dst++ = ';';
382
383 d = &g_dec3_cache.dec3_table[bb];
384 if (d->len == 1) {
385 *dst++ = d->s[0];
386 } else if (d->len == 2) {
387 dst[0] = d->s[0];
388 dst[1] = d->s[1];
389 dst += 2;
390 } else {
391 dst[0] = d->s[0];
392 dst[1] = d->s[1];
393 dst[2] = d->s[2];
394 dst += 3;
395 }
396
397 *dst++ = 'm';
398 return dst;
399}

References global_dec3_cache_t::dec3_table, g_dec3_cache, dec3_t::len, and dec3_t::s.