FFmpeg: libavfilter/drawutils.c Source File

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libavfilter

drawutils.c

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1 /*

4 *

5 * This file is part of FFmpeg.

6 *

7 * FFmpeg is free software; you can redistribute it and/or

8 * modify it under the terms of the GNU Lesser General Public

9 * License as published by the Free Software Foundation; either

10 * version 2.1 of the License, or (at your option) any later version.

11 *

12 * FFmpeg is distributed in the hope that it will be useful,

13 * but WITHOUT ANY WARRANTY; without even the implied warranty of

14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

15 * Lesser General Public License for more details.

16 *

17 * You should have received a copy of the GNU Lesser General Public

18 * License along with FFmpeg; if not, write to the Free Software

19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

20 */

22 #include <string.h>

24 #include "libavutil/avutil.h"

25 #include "libavutil/colorspace.h"

26 #include "libavutil/mem.h"

27 #include "libavutil/pixdesc.h"

28 #include "drawutils.h"

29 #include "formats.h"

31 enum { RED = 0, GREEN, BLUE, ALPHA };

33 int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)

34 {

35 switch (pix_fmt) {

36 case AV_PIX_FMT_0RGB:

37 case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;

38 case AV_PIX_FMT_0BGR:

39 case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;

40 case AV_PIX_FMT_RGB48LE:

41 case AV_PIX_FMT_RGB48BE:

42 case AV_PIX_FMT_RGBA64BE:

43 case AV_PIX_FMT_RGBA64LE:

44 case AV_PIX_FMT_RGB0:

45 case AV_PIX_FMT_RGBA:

46 case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;

47 case AV_PIX_FMT_BGR48LE:

48 case AV_PIX_FMT_BGR48BE:

49 case AV_PIX_FMT_BGRA64BE:

50 case AV_PIX_FMT_BGRA64LE:

51 case AV_PIX_FMT_BGRA:

52 case AV_PIX_FMT_BGR0:

53 case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;

54 case AV_PIX_FMT_GBRAP:

55 case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;

56 default: /* unsupported */

57 return AVERROR(EINVAL);

58 }

59 return 0;

60 }

62 int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],

63 enum AVPixelFormat pix_fmt, uint8_t rgba_color[4],

64 int *is_packed_rgba, uint8_t rgba_map_ptr[4])

65 {

66 uint8_t rgba_map[4] = {0};

67 int i;

68 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt);

69 int hsub = pix_desc->log2_chroma_w;

71 *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;

73 if (*is_packed_rgba) {

74 pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;

75 for (i = 0; i < 4; i++)

76 dst_color[rgba_map[i]] = rgba_color[i];

78 line[0] = av_malloc_array(w, pixel_step[0]);

79 if (!line[0])

80 return AVERROR(ENOMEM);

81 for (i = 0; i < w; i++)

82 memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);

83 if (rgba_map_ptr)

84 memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);

85 } else {

86 int plane;

88 dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);

89 dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);

90 dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);

91 dst_color[3] = rgba_color[3];

93 for (plane = 0; plane < 4; plane++) {

94 int line_size;

95 int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;

97 pixel_step[plane] = 1;

98 line_size = FF_CEIL_RSHIFT(w, hsub1) * pixel_step[plane];

99 line[plane] = av_malloc(line_size);

100 if (!line[plane]) {

101 while(plane && line[plane-1])

102 av_freep(&line[--plane]);

103 return AVERROR(ENOMEM);

104 }

105 memset(line[plane], dst_color[plane], line_size);

106 }

107 }

108

109 return 0;

110 }

111

112 void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],

113 uint8_t *src[4], int pixelstep[4],

114 int hsub, int vsub, int x, int y, int w, int h)

115 {

116 int i, plane;

117 uint8_t *p;

118

119 for (plane = 0; plane < 4 && dst[plane]; plane++) {

120 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;

121 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;

122 int width = FF_CEIL_RSHIFT(w, hsub1);

123 int height = FF_CEIL_RSHIFT(h, vsub1);

124

125 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];

126 for (i = 0; i < height; i++) {

127 memcpy(p + (x >> hsub1) * pixelstep[plane],

128 src[plane], width * pixelstep[plane]);

129 p += dst_linesize[plane];

130 }

131 }

132 }

133

134 void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],

135 uint8_t *src[4], int src_linesize[4], int pixelstep[4],

136 int hsub, int vsub, int x, int y, int y2, int w, int h)

137 {

138 int i, plane;

139 uint8_t *p;

140

141 for (plane = 0; plane < 4 && dst[plane]; plane++) {

142 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;

143 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;

144 int width = FF_CEIL_RSHIFT(w, hsub1);

145 int height = FF_CEIL_RSHIFT(h, vsub1);

146

147 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];

148 for (i = 0; i < height; i++) {

149 memcpy(p + (x >> hsub1) * pixelstep[plane],

150 src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), width * pixelstep[plane]);

151 p += dst_linesize[plane];

152 }

153 }

154 }

155

156 int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)

157 {

158 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);

159 const AVComponentDescriptor *c;

160 unsigned i, nb_planes = 0;

161 int pixelstep[MAX_PLANES] = { 0 };

162

163 if (!desc->name)

164 return AVERROR(EINVAL);

165 if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA))

166 return AVERROR(ENOSYS);

167 for (i = 0; i < desc->nb_components; i++) {

168 c = &desc->comp[i];

169 /* for now, only 8-bits formats */

170 if (c->depth_minus1 != 8 - 1)

171 return AVERROR(ENOSYS);

172 if (c->plane >= MAX_PLANES)

173 return AVERROR(ENOSYS);

174 /* strange interleaving */

175 if (pixelstep[c->plane] != 0 &&

176 pixelstep[c->plane] != c->step_minus1 + 1)

177 return AVERROR(ENOSYS);

178 pixelstep[c->plane] = c->step_minus1 + 1;

179 if (pixelstep[c->plane] >= 8)

180 return AVERROR(ENOSYS);

181 nb_planes = FFMAX(nb_planes, c->plane + 1);

182 }

183 if ((desc->log2_chroma_w || desc->log2_chroma_h) && nb_planes < 3)

184 return AVERROR(ENOSYS); /* exclude NV12 and NV21 */

185 memset(draw, 0, sizeof(*draw));

186 draw->desc = desc;

187 draw->format = format;

188 draw->nb_planes = nb_planes;

189 memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));

190 draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;

191 draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;

192 for (i = 0; i < ((desc->nb_components - 1) | 1); i++)

193 draw->comp_mask[desc->comp[i].plane] |=

194 1 << (desc->comp[i].offset_plus1 - 1);

195 return 0;

196 }

197

198 void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])

199 {

200 unsigned i;

201 uint8_t rgba_map[4];

202

203 if (rgba != color->rgba)

204 memcpy(color->rgba, rgba, sizeof(color->rgba));

205 if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) &&

206 ff_fill_rgba_map(rgba_map, draw->format) >= 0) {

207 if (draw->nb_planes == 1) {

208 for (i = 0; i < 4; i++)

209 color->comp[0].u8[rgba_map[i]] = rgba[i];

210 } else {

211 for (i = 0; i < 4; i++)

212 color->comp[rgba_map[i]].u8[0] = rgba[i];

213 }

214 } else if (draw->nb_planes == 3 || draw->nb_planes == 4) {

215 /* assume YUV */

216 color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);

217 color->comp[1].u8[0] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);

218 color->comp[2].u8[0] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);

219 color->comp[3].u8[0] = rgba[3];

220 } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A) {

221 color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);

222 color->comp[1].u8[0] = rgba[3];

223 } else {

224 av_log(NULL, AV_LOG_WARNING,

225 "Color conversion not implemented for %s\n", draw->desc->name);

226 memset(color, 128, sizeof(*color));

227 }

228 }

229

230 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],

231 int plane, int x, int y)

232 {

233 return data[plane] +

234 (y >> draw->vsub[plane]) * linesize[plane] +

235 (x >> draw->hsub[plane]) * draw->pixelstep[plane];

236 }

237

238 void ff_copy_rectangle2(FFDrawContext *draw,

239 uint8_t *dst[], int dst_linesize[],

240 uint8_t *src[], int src_linesize[],

241 int dst_x, int dst_y, int src_x, int src_y,

242 int w, int h)

243 {

244 int plane, y, wp, hp;

245 uint8_t *p, *q;

246

247 for (plane = 0; plane < draw->nb_planes; plane++) {

248 p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);

249 q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);

250 wp = FF_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];

251 hp = FF_CEIL_RSHIFT(h, draw->vsub[plane]);

252 for (y = 0; y < hp; y++) {

253 memcpy(q, p, wp);

254 p += src_linesize[plane];

255 q += dst_linesize[plane];

256 }

257 }

258 }

259

260 void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,

261 uint8_t *dst[], int dst_linesize[],

262 int dst_x, int dst_y, int w, int h)

263 {

264 int plane, x, y, wp, hp;

265 uint8_t *p0, *p;

266

267 for (plane = 0; plane < draw->nb_planes; plane++) {

268 p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);

269 wp = FF_CEIL_RSHIFT(w, draw->hsub[plane]);

270 hp = FF_CEIL_RSHIFT(h, draw->vsub[plane]);

271 if (!hp)

272 return;

273 p = p0;

274 /* copy first line from color */

275 for (x = 0; x < wp; x++) {

276 memcpy(p, color->comp[plane].u8, draw->pixelstep[plane]);

277 p += draw->pixelstep[plane];

278 }

279 wp *= draw->pixelstep[plane];

280 /* copy next lines from first line */

281 p = p0 + dst_linesize[plane];

282 for (y = 1; y < hp; y++) {

283 memcpy(p, p0, wp);

284 p += dst_linesize[plane];

285 }

286 }

287 }

288

289 /**

290 * Clip interval [x; x+w[ within [0; wmax[.

291 * The resulting w may be negative if the final interval is empty.

292 * dx, if not null, return the difference between in and out value of x.

293 */

294 static void clip_interval(int wmax, int *x, int *w, int *dx)

295 {

296 if (dx)

297 *dx = 0;

298 if (*x < 0) {

299 if (dx)

300 *dx = -*x;

301 *w += *x;

302 *x = 0;

303 }

304 if (*x + *w > wmax)

305 *w = wmax - *x;

306 }

307

308 /**

309 * Decompose w pixels starting at x

310 * into start + (w starting at x) + end

311 * with x and w aligned on multiples of 1<<sub.

312 */

313 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)

314 {

315 int mask = (1 << sub) - 1;

316

317 *start = (-*x) & mask;

318 *x += *start;

319 *start = FFMIN(*start, *w);

320 *w -= *start;

321 *end = *w & mask;

322 *w >>= sub;

323 }

324

325 static int component_used(FFDrawContext *draw, int plane, int comp)

326 {

327 return (draw->comp_mask[plane] >> comp) & 1;

328 }

329

330 /* If alpha is in the [ 0 ; 0x1010101 ] range,

331 then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,

332 and >> 24 gives a correct rounding. */

333 static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,

334 int dx, int w, unsigned hsub, int left, int right)

335 {

336 unsigned asrc = alpha * src;

337 unsigned tau = 0x1010101 - alpha;

338 int x;

339

340 if (left) {

341 unsigned suba = (left * alpha) >> hsub;

342 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;

343 dst += dx;

344 }

345 for (x = 0; x < w; x++) {

346 *dst = (*dst * tau + asrc) >> 24;

347 dst += dx;

348 }

349 if (right) {

350 unsigned suba = (right * alpha) >> hsub;

351 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;

352 }

353 }

354

355 void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,

356 uint8_t *dst[], int dst_linesize[],

357 int dst_w, int dst_h,

358 int x0, int y0, int w, int h)

359 {

360 unsigned alpha, nb_planes, nb_comp, plane, comp;

361 int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;

362 uint8_t *p0, *p;

363

364 /* TODO optimize if alpha = 0xFF */

365 clip_interval(dst_w, &x0, &w, NULL);

366 clip_interval(dst_h, &y0, &h, NULL);

367 if (w <= 0 || h <= 0 || !color->rgba[3])

368 return;

369 /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */

370 alpha = 0x10203 * color->rgba[3] + 0x2;

371 nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */

372 for (plane = 0; plane < nb_planes; plane++) {

373 nb_comp = draw->pixelstep[plane];

374 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);

375 w_sub = w;

376 h_sub = h;

377 x_sub = x0;

378 y_sub = y0;

379 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);

380 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);

381 for (comp = 0; comp < nb_comp; comp++) {

382 if (!component_used(draw, plane, comp))

383 continue;

384 p = p0 + comp;

385 if (top) {

386 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,

387 draw->pixelstep[plane], w_sub,

388 draw->hsub[plane], left, right);

389 p += dst_linesize[plane];

390 }

391 for (y = 0; y < h_sub; y++) {

392 blend_line(p, color->comp[plane].u8[comp], alpha,

393 draw->pixelstep[plane], w_sub,

394 draw->hsub[plane], left, right);

395 p += dst_linesize[plane];

396 }

397 if (bottom)

398 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,

399 draw->pixelstep[plane], w_sub,

400 draw->hsub[plane], left, right);

401 }

402 }

403 }

404

405 static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,

406 uint8_t *mask, int mask_linesize, int l2depth,

407 unsigned w, unsigned h, unsigned shift, unsigned xm0)

408 {

409 unsigned xm, x, y, t = 0;

410 unsigned xmshf = 3 - l2depth;

411 unsigned xmmod = 7 >> l2depth;

412 unsigned mbits = (1 << (1 << l2depth)) - 1;

413 unsigned mmult = 255 / mbits;

414

415 for (y = 0; y < h; y++) {

416 xm = xm0;

417 for (x = 0; x < w; x++) {

418 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)

419 * mmult;

420 xm++;

421 }

422 mask += mask_linesize;

423 }

424 alpha = (t >> shift) * alpha;

425 *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;

426 }

427

428 static void blend_line_hv(uint8_t *dst, int dst_delta,

429 unsigned src, unsigned alpha,

430 uint8_t *mask, int mask_linesize, int l2depth, int w,

431 unsigned hsub, unsigned vsub,

432 int xm, int left, int right, int hband)

433 {

434 int x;

435

436 if (left) {

437 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,

438 left, hband, hsub + vsub, xm);

439 dst += dst_delta;

440 xm += left;

441 }

442 for (x = 0; x < w; x++) {

443 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,

444 1 << hsub, hband, hsub + vsub, xm);

445 dst += dst_delta;

446 xm += 1 << hsub;

447 }

448 if (right)

449 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,

450 right, hband, hsub + vsub, xm);

451 }

452

453 void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,

454 uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,

455 uint8_t *mask, int mask_linesize, int mask_w, int mask_h,

456 int l2depth, unsigned endianness, int x0, int y0)

457 {

458 unsigned alpha, nb_planes, nb_comp, plane, comp;

459 int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;

460 uint8_t *p0, *p, *m;

461

462 clip_interval(dst_w, &x0, &mask_w, &xm0);

463 clip_interval(dst_h, &y0, &mask_h, &ym0);

464 mask += ym0 * mask_linesize;

465 if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])

466 return;

467 /* alpha is in the [ 0 ; 0x10203 ] range,

468 alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */

469 alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;

470 nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */

471 for (plane = 0; plane < nb_planes; plane++) {

472 nb_comp = draw->pixelstep[plane];

473 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);

474 w_sub = mask_w;

475 h_sub = mask_h;

476 x_sub = x0;

477 y_sub = y0;

478 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);

479 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);

480 for (comp = 0; comp < nb_comp; comp++) {

481 if (!component_used(draw, plane, comp))

482 continue;

483 p = p0 + comp;

484 m = mask;

485 if (top) {

486 blend_line_hv(p, draw->pixelstep[plane],

487 color->comp[plane].u8[comp], alpha,

488 m, mask_linesize, l2depth, w_sub,

489 draw->hsub[plane], draw->vsub[plane],

490 xm0, left, right, top);

491 p += dst_linesize[plane];

492 m += top * mask_linesize;

493 }

494 for (y = 0; y < h_sub; y++) {

495 blend_line_hv(p, draw->pixelstep[plane],

496 color->comp[plane].u8[comp], alpha,

497 m, mask_linesize, l2depth, w_sub,

498 draw->hsub[plane], draw->vsub[plane],

499 xm0, left, right, 1 << draw->vsub[plane]);

500 p += dst_linesize[plane];

501 m += mask_linesize << draw->vsub[plane];

502 }

503 if (bottom)

504 blend_line_hv(p, draw->pixelstep[plane],

505 color->comp[plane].u8[comp], alpha,

506 m, mask_linesize, l2depth, w_sub,

507 draw->hsub[plane], draw->vsub[plane],

508 xm0, left, right, bottom);

509 }

510 }

511 }

512

513 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,

514 int value)

515 {

516 unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;

517

518 if (!shift)

519 return value;

520 if (round_dir >= 0)

521 value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);

522 return (value >> shift) << shift;

523 }

524

525 AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)

526 {

527 enum AVPixelFormat i;

528 FFDrawContext draw;

529 AVFilterFormats *fmts = NULL;

530

531 for (i = 0; av_pix_fmt_desc_get(i); i++)

532 if (ff_draw_init(&draw, i, flags) >= 0)

533 ff_add_format(&fmts, i);

534 return fmts;

535 }

536

537 #ifdef TEST

538

539 #undef printf

540

541 int main(void)

542 {

543 enum AVPixelFormat f;

544 const AVPixFmtDescriptor *desc;

545 FFDrawContext draw;

546 FFDrawColor color;

547 int r, i;

548

549 for (f = 0; av_pix_fmt_desc_get(f); f++) {

550 desc = av_pix_fmt_desc_get(f);

551 if (!desc->name)

552 continue;

553 printf("Testing %s...%*s", desc->name,

554 (int)(16 - strlen(desc->name)), "");

555 r = ff_draw_init(&draw, f, 0);

556 if (r < 0) {

557 char buf[128];

558 av_strerror(r, buf, sizeof(buf));

559 printf("no: %s\n", buf);

560 continue;

561 }

562 ff_draw_color(&draw, &color, (uint8_t[]) { 1, 0, 0, 1 });

563 for (i = 0; i < sizeof(color); i++)

564 if (((uint8_t *)&color)[i] != 128)

565 break;

566 if (i == sizeof(color)) {

567 printf("fallback color\n");

568 continue;

569 }

570 printf("ok\n");

571 }

572 return 0;

573 }

574

575 #endif

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