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drawutils.c
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1 /*
2  * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it>
3  * Copyright 2012 Nicolas George <nicolas.george normalesup org>
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  */
21 
22 #include <string.h>
23 
24 #include "libavutil/avassert.h"
25 #include "libavutil/avutil.h"
26 #include "libavutil/colorspace.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/mem.h"
29 #include "libavutil/pixdesc.h"
30 #include "drawutils.h"
31 #include "formats.h"
32 
33 enum { RED = 0, GREEN, BLUE, ALPHA };
34 
36 {
37  switch (pix_fmt) {
38  case AV_PIX_FMT_0RGB:
39  case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
40  case AV_PIX_FMT_0BGR:
41  case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
42  case AV_PIX_FMT_RGB48LE:
43  case AV_PIX_FMT_RGB48BE:
46  case AV_PIX_FMT_RGB0:
47  case AV_PIX_FMT_RGBA:
48  case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
49  case AV_PIX_FMT_BGR48LE:
50  case AV_PIX_FMT_BGR48BE:
53  case AV_PIX_FMT_BGRA:
54  case AV_PIX_FMT_BGR0:
55  case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
56  case AV_PIX_FMT_GBRP9LE:
57  case AV_PIX_FMT_GBRP9BE:
66  case AV_PIX_FMT_GBRAP:
73  case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
74  default: /* unsupported */
75  return AVERROR(EINVAL);
76  }
77  return 0;
78 }
79 
80 int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
81  enum AVPixelFormat pix_fmt, uint8_t rgba_color[4],
82  int *is_packed_rgba, uint8_t rgba_map_ptr[4])
83 {
84  uint8_t rgba_map[4] = {0};
85  int i;
86  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt);
87  int hsub;
88 
89  av_assert0(pix_desc);
90 
91  hsub = pix_desc->log2_chroma_w;
92 
93  *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
94 
95  if (*is_packed_rgba) {
96  pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
97  for (i = 0; i < 4; i++)
98  dst_color[rgba_map[i]] = rgba_color[i];
99 
100  line[0] = av_malloc_array(w, pixel_step[0]);
101  if (!line[0])
102  return AVERROR(ENOMEM);
103  for (i = 0; i < w; i++)
104  memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
105  if (rgba_map_ptr)
106  memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
107  } else {
108  int plane;
109 
110  dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
111  dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
112  dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
113  dst_color[3] = rgba_color[3];
114 
115  for (plane = 0; plane < 4; plane++) {
116  int line_size;
117  int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
118 
119  pixel_step[plane] = 1;
120  line_size = AV_CEIL_RSHIFT(w, hsub1) * pixel_step[plane];
121  line[plane] = av_malloc(line_size);
122  if (!line[plane]) {
123  while(plane && line[plane-1])
124  av_freep(&line[--plane]);
125  return AVERROR(ENOMEM);
126  }
127  memset(line[plane], dst_color[plane], line_size);
128  }
129  }
130 
131  return 0;
132 }
133 
134 void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
135  uint8_t *src[4], int pixelstep[4],
136  int hsub, int vsub, int x, int y, 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 = AV_CEIL_RSHIFT(w, hsub1);
145  int height = AV_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], width * pixelstep[plane]);
151  p += dst_linesize[plane];
152  }
153  }
154 }
155 
156 void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
157  uint8_t *src[4], int src_linesize[4], int pixelstep[4],
158  int hsub, int vsub, int x, int y, int y2, int w, int h)
159 {
160  int i, plane;
161  uint8_t *p;
162 
163  for (plane = 0; plane < 4 && dst[plane]; plane++) {
164  int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
165  int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
166  int width = AV_CEIL_RSHIFT(w, hsub1);
167  int height = AV_CEIL_RSHIFT(h, vsub1);
168 
169  p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
170  for (i = 0; i < height; i++) {
171  memcpy(p + (x >> hsub1) * pixelstep[plane],
172  src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), width * pixelstep[plane]);
173  p += dst_linesize[plane];
174  }
175  }
176 }
177 
179 {
181  const AVComponentDescriptor *c;
182  unsigned i, nb_planes = 0;
183  int pixelstep[MAX_PLANES] = { 0 };
184 
185  if (!desc || !desc->name)
186  return AVERROR(EINVAL);
188  return AVERROR(ENOSYS);
189  if (format == AV_PIX_FMT_P010LE || format == AV_PIX_FMT_P010BE)
190  return AVERROR(ENOSYS);
191  for (i = 0; i < desc->nb_components; i++) {
192  c = &desc->comp[i];
193  /* for now, only 8-16 bits formats */
194  if (c->depth < 8 || c->depth > 16)
195  return AVERROR(ENOSYS);
196  if (desc->flags & AV_PIX_FMT_FLAG_BE)
197  return AVERROR(ENOSYS);
198  if (c->plane >= MAX_PLANES)
199  return AVERROR(ENOSYS);
200  /* strange interleaving */
201  if (pixelstep[c->plane] != 0 &&
202  pixelstep[c->plane] != c->step)
203  return AVERROR(ENOSYS);
204  if (pixelstep[c->plane] == 6 &&
205  c->depth == 16)
206  return AVERROR(ENOSYS);
207  pixelstep[c->plane] = c->step;
208  if (pixelstep[c->plane] >= 8)
209  return AVERROR(ENOSYS);
210  nb_planes = FFMAX(nb_planes, c->plane + 1);
211  }
212  memset(draw, 0, sizeof(*draw));
213  draw->desc = desc;
214  draw->format = format;
215  draw->nb_planes = nb_planes;
216  draw->flags = flags;
217  memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
218  draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
219  draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
220  for (i = 0; i < (desc->nb_components - !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(flags & FF_DRAW_PROCESS_ALPHA))); i++)
221  draw->comp_mask[desc->comp[i].plane] |=
222  1 << desc->comp[i].offset;
223  return 0;
224 }
225 
227 {
228  unsigned i;
229  uint8_t rgba_map[4];
230 
231  if (rgba != color->rgba)
232  memcpy(color->rgba, rgba, sizeof(color->rgba));
233  if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) &&
234  ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
235  if (draw->nb_planes == 1) {
236  for (i = 0; i < 4; i++) {
237  color->comp[0].u8[rgba_map[i]] = rgba[i];
238  if (draw->desc->comp[rgba_map[i]].depth > 8) {
239  color->comp[0].u16[rgba_map[i]] = color->comp[0].u8[rgba_map[i]] << 8;
240  }
241  }
242  } else {
243  for (i = 0; i < 4; i++) {
244  color->comp[rgba_map[i]].u8[0] = rgba[i];
245  if (draw->desc->comp[rgba_map[i]].depth > 8)
246  color->comp[rgba_map[i]].u16[0] = color->comp[rgba_map[i]].u8[0] << (draw->desc->comp[rgba_map[i]].depth - 8);
247  }
248  }
249  } else if (draw->nb_planes >= 2) {
250  /* assume YUV */
251  const AVPixFmtDescriptor *desc = draw->desc;
252  color->comp[desc->comp[0].plane].u8[desc->comp[0].offset] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
253  color->comp[desc->comp[1].plane].u8[desc->comp[1].offset] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
254  color->comp[desc->comp[2].plane].u8[desc->comp[2].offset] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
255  color->comp[3].u8[0] = rgba[3];
256 #define EXPAND(compn) \
257  if (desc->comp[compn].depth > 8) \
258  color->comp[desc->comp[compn].plane].u16[desc->comp[compn].offset] = \
259  color->comp[desc->comp[compn].plane].u8[desc->comp[compn].offset] << \
260  (draw->desc->comp[compn].depth + draw->desc->comp[compn].shift - 8)
261  EXPAND(3);
262  EXPAND(2);
263  EXPAND(1);
264  EXPAND(0);
265  } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A ||
266  draw->format == AV_PIX_FMT_GRAY16LE || draw->format == AV_PIX_FMT_YA16LE ||
267  draw->format == AV_PIX_FMT_GRAY9LE ||
268  draw->format == AV_PIX_FMT_GRAY10LE ||
269  draw->format == AV_PIX_FMT_GRAY12LE) {
270  const AVPixFmtDescriptor *desc = draw->desc;
271  color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
272  EXPAND(0);
273  color->comp[1].u8[0] = rgba[3];
274  EXPAND(1);
275  } else {
277  "Color conversion not implemented for %s\n", draw->desc->name);
278  memset(color, 128, sizeof(*color));
279  }
280 }
281 
282 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
283  int plane, int x, int y)
284 {
285  return data[plane] +
286  (y >> draw->vsub[plane]) * linesize[plane] +
287  (x >> draw->hsub[plane]) * draw->pixelstep[plane];
288 }
289 
291  uint8_t *dst[], int dst_linesize[],
292  uint8_t *src[], int src_linesize[],
293  int dst_x, int dst_y, int src_x, int src_y,
294  int w, int h)
295 {
296  int plane, y, wp, hp;
297  uint8_t *p, *q;
298 
299  for (plane = 0; plane < draw->nb_planes; plane++) {
300  p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
301  q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
302  wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];
303  hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
304  for (y = 0; y < hp; y++) {
305  memcpy(q, p, wp);
306  p += src_linesize[plane];
307  q += dst_linesize[plane];
308  }
309  }
310 }
311 
313  uint8_t *dst[], int dst_linesize[],
314  int dst_x, int dst_y, int w, int h)
315 {
316  int plane, x, y, wp, hp;
317  uint8_t *p0, *p;
318  FFDrawColor color_tmp = *color;
319 
320  for (plane = 0; plane < draw->nb_planes; plane++) {
321  p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
322  wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]);
323  hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
324  if (!hp)
325  return;
326  p = p0;
327 
328  if (HAVE_BIGENDIAN && draw->desc->comp[0].depth > 8) {
329  for (x = 0; 2*x < draw->pixelstep[plane]; x++)
330  color_tmp.comp[plane].u16[x] = av_bswap16(color_tmp.comp[plane].u16[x]);
331  }
332 
333  /* copy first line from color */
334  for (x = 0; x < wp; x++) {
335  memcpy(p, color_tmp.comp[plane].u8, draw->pixelstep[plane]);
336  p += draw->pixelstep[plane];
337  }
338  wp *= draw->pixelstep[plane];
339  /* copy next lines from first line */
340  p = p0 + dst_linesize[plane];
341  for (y = 1; y < hp; y++) {
342  memcpy(p, p0, wp);
343  p += dst_linesize[plane];
344  }
345  }
346 }
347 
348 /**
349  * Clip interval [x; x+w[ within [0; wmax[.
350  * The resulting w may be negative if the final interval is empty.
351  * dx, if not null, return the difference between in and out value of x.
352  */
353 static void clip_interval(int wmax, int *x, int *w, int *dx)
354 {
355  if (dx)
356  *dx = 0;
357  if (*x < 0) {
358  if (dx)
359  *dx = -*x;
360  *w += *x;
361  *x = 0;
362  }
363  if (*x + *w > wmax)
364  *w = wmax - *x;
365 }
366 
367 /**
368  * Decompose w pixels starting at x
369  * into start + (w starting at x) + end
370  * with x and w aligned on multiples of 1<<sub.
371  */
372 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
373 {
374  int mask = (1 << sub) - 1;
375 
376  *start = (-*x) & mask;
377  *x += *start;
378  *start = FFMIN(*start, *w);
379  *w -= *start;
380  *end = *w & mask;
381  *w >>= sub;
382 }
383 
384 static int component_used(FFDrawContext *draw, int plane, int comp)
385 {
386  return (draw->comp_mask[plane] >> comp) & 1;
387 }
388 
389 /* If alpha is in the [ 0 ; 0x1010101 ] range,
390  then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,
391  and >> 24 gives a correct rounding. */
392 static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
393  int dx, int w, unsigned hsub, int left, int right)
394 {
395  unsigned asrc = alpha * src;
396  unsigned tau = 0x1010101 - alpha;
397  int x;
398 
399  if (left) {
400  unsigned suba = (left * alpha) >> hsub;
401  *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
402  dst += dx;
403  }
404  for (x = 0; x < w; x++) {
405  *dst = (*dst * tau + asrc) >> 24;
406  dst += dx;
407  }
408  if (right) {
409  unsigned suba = (right * alpha) >> hsub;
410  *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
411  }
412 }
413 
414 static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha,
415  int dx, int w, unsigned hsub, int left, int right)
416 {
417  unsigned asrc = alpha * src;
418  unsigned tau = 0x10001 - alpha;
419  int x;
420 
421  if (left) {
422  unsigned suba = (left * alpha) >> hsub;
423  uint16_t value = AV_RL16(dst);
424  AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
425  dst += dx;
426  }
427  for (x = 0; x < w; x++) {
428  uint16_t value = AV_RL16(dst);
429  AV_WL16(dst, (value * tau + asrc) >> 16);
430  dst += dx;
431  }
432  if (right) {
433  unsigned suba = (right * alpha) >> hsub;
434  uint16_t value = AV_RL16(dst);
435  AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
436  }
437 }
438 
440  uint8_t *dst[], int dst_linesize[],
441  int dst_w, int dst_h,
442  int x0, int y0, int w, int h)
443 {
444  unsigned alpha, nb_planes, nb_comp, plane, comp;
445  int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
446  uint8_t *p0, *p;
447 
448  /* TODO optimize if alpha = 0xFF */
449  clip_interval(dst_w, &x0, &w, NULL);
450  clip_interval(dst_h, &y0, &h, NULL);
451  if (w <= 0 || h <= 0 || !color->rgba[3])
452  return;
453  if (draw->desc->comp[0].depth <= 8) {
454  /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
455  alpha = 0x10203 * color->rgba[3] + 0x2;
456  } else {
457  /* 0x101 * alpha is in the [ 2 ; 0x1001] range */
458  alpha = 0x101 * color->rgba[3] + 0x2;
459  }
460  nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
461  nb_planes += !nb_planes;
462  for (plane = 0; plane < nb_planes; plane++) {
463  nb_comp = draw->pixelstep[plane];
464  p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
465  w_sub = w;
466  h_sub = h;
467  x_sub = x0;
468  y_sub = y0;
469  subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
470  subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
471  for (comp = 0; comp < nb_comp; comp++) {
472  const int depth = draw->desc->comp[comp].depth;
473 
474  if (!component_used(draw, plane, comp))
475  continue;
476  p = p0 + comp;
477  if (top) {
478  if (depth <= 8) {
479  blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
480  draw->pixelstep[plane], w_sub,
481  draw->hsub[plane], left, right);
482  } else {
483  blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
484  draw->pixelstep[plane], w_sub,
485  draw->hsub[plane], left, right);
486  }
487  p += dst_linesize[plane];
488  }
489  if (depth <= 8) {
490  for (y = 0; y < h_sub; y++) {
491  blend_line(p, color->comp[plane].u8[comp], alpha,
492  draw->pixelstep[plane], w_sub,
493  draw->hsub[plane], left, right);
494  p += dst_linesize[plane];
495  }
496  } else {
497  for (y = 0; y < h_sub; y++) {
498  blend_line16(p, color->comp[plane].u16[comp], alpha,
499  draw->pixelstep[plane], w_sub,
500  draw->hsub[plane], left, right);
501  p += dst_linesize[plane];
502  }
503  }
504  if (bottom) {
505  if (depth <= 8) {
506  blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
507  draw->pixelstep[plane], w_sub,
508  draw->hsub[plane], left, right);
509  } else {
510  blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
511  draw->pixelstep[plane], w_sub,
512  draw->hsub[plane], left, right);
513  }
514  }
515  }
516  }
517 }
518 
519 static void blend_pixel16(uint8_t *dst, unsigned src, unsigned alpha,
520  const uint8_t *mask, int mask_linesize, int l2depth,
521  unsigned w, unsigned h, unsigned shift, unsigned xm0)
522 {
523  unsigned xm, x, y, t = 0;
524  unsigned xmshf = 3 - l2depth;
525  unsigned xmmod = 7 >> l2depth;
526  unsigned mbits = (1 << (1 << l2depth)) - 1;
527  unsigned mmult = 255 / mbits;
528  uint16_t value = AV_RL16(dst);
529 
530  for (y = 0; y < h; y++) {
531  xm = xm0;
532  for (x = 0; x < w; x++) {
533  t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
534  * mmult;
535  xm++;
536  }
537  mask += mask_linesize;
538  }
539  alpha = (t >> shift) * alpha;
540  AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16);
541 }
542 
543 static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
544  const uint8_t *mask, int mask_linesize, int l2depth,
545  unsigned w, unsigned h, unsigned shift, unsigned xm0)
546 {
547  unsigned xm, x, y, t = 0;
548  unsigned xmshf = 3 - l2depth;
549  unsigned xmmod = 7 >> l2depth;
550  unsigned mbits = (1 << (1 << l2depth)) - 1;
551  unsigned mmult = 255 / mbits;
552 
553  for (y = 0; y < h; y++) {
554  xm = xm0;
555  for (x = 0; x < w; x++) {
556  t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
557  * mmult;
558  xm++;
559  }
560  mask += mask_linesize;
561  }
562  alpha = (t >> shift) * alpha;
563  *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
564 }
565 
566 static void blend_line_hv16(uint8_t *dst, int dst_delta,
567  unsigned src, unsigned alpha,
568  const uint8_t *mask, int mask_linesize, int l2depth, int w,
569  unsigned hsub, unsigned vsub,
570  int xm, int left, int right, int hband)
571 {
572  int x;
573 
574  if (left) {
575  blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
576  left, hband, hsub + vsub, xm);
577  dst += dst_delta;
578  xm += left;
579  }
580  for (x = 0; x < w; x++) {
581  blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
582  1 << hsub, hband, hsub + vsub, xm);
583  dst += dst_delta;
584  xm += 1 << hsub;
585  }
586  if (right)
587  blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
588  right, hband, hsub + vsub, xm);
589 }
590 
591 static void blend_line_hv(uint8_t *dst, int dst_delta,
592  unsigned src, unsigned alpha,
593  const uint8_t *mask, int mask_linesize, int l2depth, int w,
594  unsigned hsub, unsigned vsub,
595  int xm, int left, int right, int hband)
596 {
597  int x;
598 
599  if (left) {
600  blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
601  left, hband, hsub + vsub, xm);
602  dst += dst_delta;
603  xm += left;
604  }
605  for (x = 0; x < w; x++) {
606  blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
607  1 << hsub, hband, hsub + vsub, xm);
608  dst += dst_delta;
609  xm += 1 << hsub;
610  }
611  if (right)
612  blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
613  right, hband, hsub + vsub, xm);
614 }
615 
617  uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
618  const uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
619  int l2depth, unsigned endianness, int x0, int y0)
620 {
621  unsigned alpha, nb_planes, nb_comp, plane, comp;
622  int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
623  uint8_t *p0, *p;
624  const uint8_t *m;
625 
626  clip_interval(dst_w, &x0, &mask_w, &xm0);
627  clip_interval(dst_h, &y0, &mask_h, &ym0);
628  mask += ym0 * mask_linesize;
629  if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])
630  return;
631  if (draw->desc->comp[0].depth <= 8) {
632  /* alpha is in the [ 0 ; 0x10203 ] range,
633  alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
634  alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
635  } else {
636  alpha = (0x101 * color->rgba[3] + 0x2) >> 8;
637  }
638  nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
639  nb_planes += !nb_planes;
640  for (plane = 0; plane < nb_planes; plane++) {
641  nb_comp = draw->pixelstep[plane];
642  p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
643  w_sub = mask_w;
644  h_sub = mask_h;
645  x_sub = x0;
646  y_sub = y0;
647  subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
648  subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
649  for (comp = 0; comp < nb_comp; comp++) {
650  const int depth = draw->desc->comp[comp].depth;
651 
652  if (!component_used(draw, plane, comp))
653  continue;
654  p = p0 + comp;
655  m = mask;
656  if (top) {
657  if (depth <= 8) {
658  blend_line_hv(p, draw->pixelstep[plane],
659  color->comp[plane].u8[comp], alpha,
660  m, mask_linesize, l2depth, w_sub,
661  draw->hsub[plane], draw->vsub[plane],
662  xm0, left, right, top);
663  } else {
664  blend_line_hv16(p, draw->pixelstep[plane],
665  color->comp[plane].u16[comp], alpha,
666  m, mask_linesize, l2depth, w_sub,
667  draw->hsub[plane], draw->vsub[plane],
668  xm0, left, right, top);
669  }
670  p += dst_linesize[plane];
671  m += top * mask_linesize;
672  }
673  if (depth <= 8) {
674  for (y = 0; y < h_sub; y++) {
675  blend_line_hv(p, draw->pixelstep[plane],
676  color->comp[plane].u8[comp], alpha,
677  m, mask_linesize, l2depth, w_sub,
678  draw->hsub[plane], draw->vsub[plane],
679  xm0, left, right, 1 << draw->vsub[plane]);
680  p += dst_linesize[plane];
681  m += mask_linesize << draw->vsub[plane];
682  }
683  } else {
684  for (y = 0; y < h_sub; y++) {
685  blend_line_hv16(p, draw->pixelstep[plane],
686  color->comp[plane].u16[comp], alpha,
687  m, mask_linesize, l2depth, w_sub,
688  draw->hsub[plane], draw->vsub[plane],
689  xm0, left, right, 1 << draw->vsub[plane]);
690  p += dst_linesize[plane];
691  m += mask_linesize << draw->vsub[plane];
692  }
693  }
694  if (bottom) {
695  if (depth <= 8) {
696  blend_line_hv(p, draw->pixelstep[plane],
697  color->comp[plane].u8[comp], alpha,
698  m, mask_linesize, l2depth, w_sub,
699  draw->hsub[plane], draw->vsub[plane],
700  xm0, left, right, bottom);
701  } else {
702  blend_line_hv16(p, draw->pixelstep[plane],
703  color->comp[plane].u16[comp], alpha,
704  m, mask_linesize, l2depth, w_sub,
705  draw->hsub[plane], draw->vsub[plane],
706  xm0, left, right, bottom);
707  }
708  }
709  }
710  }
711 }
712 
713 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
714  int value)
715 {
716  unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
717 
718  if (!shift)
719  return value;
720  if (round_dir >= 0)
721  value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
722  return (value >> shift) << shift;
723 }
724 
726 {
727  enum AVPixelFormat i;
728  FFDrawContext draw;
729  AVFilterFormats *fmts = NULL;
730  int ret;
731 
732  for (i = 0; av_pix_fmt_desc_get(i); i++)
733  if (ff_draw_init(&draw, i, flags) >= 0 &&
734  (ret = ff_add_format(&fmts, i)) < 0)
735  return NULL;
736  return fmts;
737 }
int plane
Definition: avisynth_c.h:422
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
Definition: drawutils.c:725
planar GBR 4:4:4:4 40bpp, little-endian
Definition: pixfmt.h:287
int plane
Which of the 4 planes contains the component.
Definition: pixdesc.h:35
#define NULL
Definition: coverity.c:32
static enum AVPixelFormat pix_fmt
static int shift(int a, int b)
Definition: sonic.c:82
static float alpha(float a)
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2359
void ff_copy_rectangle2(FFDrawContext *draw, uint8_t *dst[], int dst_linesize[], uint8_t *src[], int src_linesize[], int dst_x, int dst_y, int src_x, int src_y, int w, int h)
Copy a rectangle from an image to another.
Definition: drawutils.c:290
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:204
uint16_t u16[8]
Definition: drawutils.h:65
uint8_t hsub[MAX_PLANES]
Definition: drawutils.h:54
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
Memory handling functions.
const char * desc
Definition: nvenc.c:63
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2311
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:164
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:203
#define av_bswap16
Definition: bswap.h:31
Various defines for YUV<->RGB conversion.
Convenience header that includes libavutil's core.
planar GBR 4:4:4 36bpp, little-endian
Definition: pixfmt.h:251
static void blend_line(uint8_t *dst, unsigned src, unsigned alpha, int dx, int w, unsigned hsub, int left, int right)
Definition: drawutils.c:392
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:235
Definition: drawutils.c:33
#define src
Definition: vp8dsp.c:254
Y , 12bpp, little-endian.
Definition: pixfmt.h:292
planar GBR 4:4:4 36bpp, big-endian
Definition: pixfmt.h:250
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
static void clip_interval(int wmax, int *x, int *w, int *dx)
Clip interval [x; x+w[ within [0; wmax[.
Definition: drawutils.c:353
int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, int value)
Round a dimension according to subsampling.
Definition: drawutils.c:713
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
planar GBRA 4:4:4:4 64bpp, big-endian
Definition: pixfmt.h:212
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:173
#define av_malloc(s)
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:234
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:99
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:201
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:90
uint8_t comp_mask[MAX_PLANES]
Definition: drawutils.h:53
#define height
planar GBR 4:4:4 48bpp, big-endian
Definition: pixfmt.h:170
Y , 9bpp, little-endian.
Definition: pixfmt.h:312
static int flags
Definition: log.c:57
Y , 10bpp, little-endian.
Definition: pixfmt.h:294
#define av_log(a,...)
union FFDrawColor::@185 comp[MAX_PLANES]
const char * name
Definition: pixdesc.h:82
planar GBR 4:4:4 27bpp, big-endian
Definition: pixfmt.h:166
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static const uint16_t mask[17]
Definition: lzw.c:38
#define AVERROR(e)
Definition: error.h:43
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:148
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:91
static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha, int dx, int w, unsigned hsub, int left, int right)
Definition: drawutils.c:414
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:226
Definition: graph2dot.c:48
uint16_t width
Definition: gdv.c:47
simple assert() macros that are a bit more flexible than ISO C assert().
static void blend_line_hv(uint8_t *dst, int dst_delta, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, int w, unsigned hsub, unsigned vsub, int xm, int left, int right, int hband)
Definition: drawutils.c:591
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
uint8_t vsub_max
Definition: drawutils.h:57
like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, big-endian
Definition: pixfmt.h:281
#define FFMAX(a, b)
Definition: common.h:94
uint8_t u8[16]
Definition: drawutils.h:66
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:88
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:145
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:89
unsigned flags
Definition: drawutils.h:58
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
planar GBR 4:4:4:4 48bpp, big-endian
Definition: pixfmt.h:283
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
planar GBR 4:4:4:4 40bpp, big-endian
Definition: pixfmt.h:286
alias for AV_PIX_FMT_YA8
Definition: pixfmt.h:142
#define FF_DRAW_PROCESS_ALPHA
Process alpha pixel component.
Definition: drawutils.h:73
static void blend_line_hv16(uint8_t *dst, int dst_delta, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, int w, unsigned hsub, unsigned vsub, int xm, int left, int right, int hband)
Definition: drawutils.c:566
#define FFMIN(a, b)
Definition: common.h:96
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
Definition: pixdesc.h:158
#define MAX_PLANES
Definition: ffv1.h:50
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, little-endian
Definition: pixfmt.h:280
Definition: drawutils.c:33
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:144
static uint8_t * pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[], int plane, int x, int y)
Definition: drawutils.c:282
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:35
static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
Decompose w pixels starting at x into start + (w starting at x) + end with x and w aligned on multipl...
Definition: drawutils.c:372
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:83
planar GBR 4:4:4:4 48bpp, little-endian
Definition: pixfmt.h:284
void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, const uint8_t *mask, int mask_linesize, int mask_w, int mask_h, int l2depth, unsigned endianness, int x0, int y0)
Blend an alpha mask with an uniform color.
Definition: drawutils.c:616
misc drawing utilities
static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, unsigned w, unsigned h, unsigned shift, unsigned xm0)
Definition: drawutils.c:543
unsigned nb_planes
Definition: drawutils.h:51
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
planar GBR 4:4:4 30bpp, big-endian
Definition: pixfmt.h:168
planar GBR 4:4:4 42bpp, little-endian
Definition: pixfmt.h:253
uint8_t hsub_max
Definition: drawutils.h:56
static const char * format
Definition: movenc.c:47
void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, int x0, int y0, int w, int h)
Blend a rectangle with an uniform color.
Definition: drawutils.c:439
void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int src_linesize[4], int pixelstep[4], int hsub, int vsub, int x, int y, int y2, int w, int h)
Definition: drawutils.c:156
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:236
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:178
planar GBR 4:4:4 42bpp, big-endian
Definition: pixfmt.h:252
static int component_used(FFDrawContext *draw, int plane, int comp)
Definition: drawutils.c:384
#define RGB_TO_U_CCIR(r1, g1, b1, shift)
Definition: colorspace.h:102
int offset
Number of elements before the component of the first pixel.
Definition: pixdesc.h:47
#define RGB_TO_V_CCIR(r1, g1, b1, shift)
Definition: colorspace.h:106
Y , 8bpp.
Definition: pixfmt.h:70
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:211
planar GBR 4:4:4 27bpp, little-endian
Definition: pixfmt.h:167
static double c[64]
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:98
static void blend_pixel16(uint8_t *dst, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, unsigned w, unsigned h, unsigned shift, unsigned xm0)
Definition: drawutils.c:519
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:128
#define RGB_TO_Y_CCIR(r, g, b)
Definition: colorspace.h:98
int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4], enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], int *is_packed_rgba, uint8_t rgba_map_ptr[4])
Definition: drawutils.c:80
Y , 16bpp, little-endian.
Definition: pixfmt.h:94
int pixelstep[MAX_PLANES]
Definition: drawutils.h:52
A list of supported formats for one end of a filter link.
Definition: formats.h:64
16 bits gray, 16 bits alpha (little-endian)
Definition: pixfmt.h:209
const struct AVPixFmtDescriptor * desc
Definition: drawutils.h:49
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
Definition: drawutils.c:312
uint8_t vsub[MAX_PLANES]
Definition: drawutils.h:55
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:690
planar GBR 4:4:4 48bpp, little-endian
Definition: pixfmt.h:171
#define av_malloc_array(a, b)
void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int pixelstep[4], int hsub, int vsub, int x, int y, int w, int h)
Definition: drawutils.c:134
#define EXPAND(compn)
int depth
Number of bits in the component.
Definition: pixdesc.h:58
planar GBRA 4:4:4:4 64bpp, little-endian
Definition: pixfmt.h:213
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:233
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
enum AVPixelFormat format
Definition: drawutils.h:50
planar GBR 4:4:4 30bpp, little-endian
Definition: pixfmt.h:169
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:202
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
uint8_t rgba[4]
Definition: drawutils.h:62