2 * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it>
3 * Copyright 2012 Nicolas George <nicolas.george normalesup org>
5 * This file is part of FFmpeg.
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.
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.
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
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"
33 enum { RED = 0, GREEN, BLUE, ALPHA };
35 int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
39 case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
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:
44 case AV_PIX_FMT_RGBA64BE:
45 case AV_PIX_FMT_RGBA64LE:
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:
51 case AV_PIX_FMT_BGRA64BE:
52 case AV_PIX_FMT_BGRA64LE:
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:
58 case AV_PIX_FMT_GBRP10LE:
59 case AV_PIX_FMT_GBRP10BE:
60 case AV_PIX_FMT_GBRP12LE:
61 case AV_PIX_FMT_GBRP12BE:
62 case AV_PIX_FMT_GBRP14LE:
63 case AV_PIX_FMT_GBRP14BE:
64 case AV_PIX_FMT_GBRP16LE:
65 case AV_PIX_FMT_GBRP16BE:
66 case AV_PIX_FMT_GBRAP:
67 case AV_PIX_FMT_GBRAP10LE:
68 case AV_PIX_FMT_GBRAP10BE:
69 case AV_PIX_FMT_GBRAP12LE:
70 case AV_PIX_FMT_GBRAP12BE:
71 case AV_PIX_FMT_GBRAP16LE:
72 case AV_PIX_FMT_GBRAP16BE:
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);
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])
84 uint8_t rgba_map[4] = {0};
86 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt);
91 hsub = pix_desc->log2_chroma_w;
93 *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
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];
100 line[0] = av_malloc_array(w, pixel_step[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]);
106 memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
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];
115 for (plane = 0; plane < 4; plane++) {
117 int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
119 pixel_step[plane] = 1;
120 line_size = AV_CEIL_RSHIFT(w, hsub1) * pixel_step[plane];
121 line[plane] = av_malloc(line_size);
123 while(plane && line[plane-1])
124 av_freep(&line[--plane]);
125 return AVERROR(ENOMEM);
127 memset(line[plane], dst_color[plane], line_size);
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)
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);
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];
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)
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);
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];
178 int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
180 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
181 const AVComponentDescriptor *c;
182 unsigned i, nb_planes = 0;
183 int pixelstep[MAX_PLANES] = { 0 };
186 if (!desc || !desc->name)
187 return AVERROR(EINVAL);
188 if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | FF_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA))
189 return AVERROR(ENOSYS);
190 if (format == AV_PIX_FMT_P010LE || format == AV_PIX_FMT_P010BE || format == AV_PIX_FMT_P016LE || format == AV_PIX_FMT_P016BE)
191 return AVERROR(ENOSYS);
192 if (format == AV_PIX_FMT_YUVJ420P || format == AV_PIX_FMT_YUVJ422P || format == AV_PIX_FMT_YUVJ444P ||
193 format == AV_PIX_FMT_YUVJ411P || format == AV_PIX_FMT_YUVJ440P)
195 for (i = 0; i < desc->nb_components; i++) {
197 /* for now, only 8-16 bits formats */
198 if (c->depth < 8 || c->depth > 16)
199 return AVERROR(ENOSYS);
200 if (desc->flags & AV_PIX_FMT_FLAG_BE)
201 return AVERROR(ENOSYS);
202 if (c->plane >= MAX_PLANES)
203 return AVERROR(ENOSYS);
204 /* strange interleaving */
205 if (pixelstep[c->plane] != 0 &&
206 pixelstep[c->plane] != c->step)
207 return AVERROR(ENOSYS);
208 if (pixelstep[c->plane] == 6 &&
210 return AVERROR(ENOSYS);
211 pixelstep[c->plane] = c->step;
212 if (pixelstep[c->plane] >= 8)
213 return AVERROR(ENOSYS);
214 nb_planes = FFMAX(nb_planes, c->plane + 1);
216 memset(draw, 0, sizeof(*draw));
218 draw->format = format;
219 draw->nb_planes = nb_planes;
221 draw->full_range = full_range;
222 memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
223 draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
224 draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
225 for (i = 0; i < (desc->nb_components - !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(flags & FF_DRAW_PROCESS_ALPHA))); i++)
226 draw->comp_mask[desc->comp[i].plane] |=
227 1 << desc->comp[i].offset;
231 void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
236 if (rgba != color->rgba)
237 memcpy(color->rgba, rgba, sizeof(color->rgba));
238 if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) &&
239 ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
240 if (draw->nb_planes == 1) {
241 for (i = 0; i < 4; i++) {
242 color->comp[0].u8[rgba_map[i]] = rgba[i];
243 if (draw->desc->comp[rgba_map[i]].depth > 8) {
244 color->comp[0].u16[rgba_map[i]] = color->comp[0].u8[rgba_map[i]] << 8;
248 for (i = 0; i < 4; i++) {
249 color->comp[rgba_map[i]].u8[0] = rgba[i];
250 if (draw->desc->comp[rgba_map[i]].depth > 8)
251 color->comp[rgba_map[i]].u16[0] = color->comp[rgba_map[i]].u8[0] << (draw->desc->comp[rgba_map[i]].depth - 8);
254 } else if (draw->nb_planes >= 2) {
256 const AVPixFmtDescriptor *desc = draw->desc;
257 color->comp[desc->comp[0].plane].u8[desc->comp[0].offset] = draw->full_range ? RGB_TO_Y_JPEG(rgba[0], rgba[1], rgba[2]) : RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
258 color->comp[desc->comp[1].plane].u8[desc->comp[1].offset] = draw->full_range ? RGB_TO_U_JPEG(rgba[0], rgba[1], rgba[2]) : RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
259 color->comp[desc->comp[2].plane].u8[desc->comp[2].offset] = draw->full_range ? RGB_TO_V_JPEG(rgba[0], rgba[1], rgba[2]) : RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
260 color->comp[3].u8[0] = rgba[3];
261 #define EXPAND(compn) \
262 if (desc->comp[compn].depth > 8) \
263 color->comp[desc->comp[compn].plane].u16[desc->comp[compn].offset] = \
264 color->comp[desc->comp[compn].plane].u8[desc->comp[compn].offset] << \
265 (draw->desc->comp[compn].depth + draw->desc->comp[compn].shift - 8)
270 } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A ||
271 draw->format == AV_PIX_FMT_GRAY16LE || draw->format == AV_PIX_FMT_YA16LE ||
272 draw->format == AV_PIX_FMT_GRAY9LE ||
273 draw->format == AV_PIX_FMT_GRAY10LE ||
274 draw->format == AV_PIX_FMT_GRAY12LE) {
275 const AVPixFmtDescriptor *desc = draw->desc;
276 color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
278 color->comp[1].u8[0] = rgba[3];
281 av_log(NULL, AV_LOG_WARNING,
282 "Color conversion not implemented for %s\n", draw->desc->name);
283 memset(color, 128, sizeof(*color));
287 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
288 int plane, int x, int y)
291 (y >> draw->vsub[plane]) * linesize[plane] +
292 (x >> draw->hsub[plane]) * draw->pixelstep[plane];
295 void ff_copy_rectangle2(FFDrawContext *draw,
296 uint8_t *dst[], int dst_linesize[],
297 uint8_t *src[], int src_linesize[],
298 int dst_x, int dst_y, int src_x, int src_y,
301 int plane, y, wp, hp;
304 for (plane = 0; plane < draw->nb_planes; plane++) {
305 p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
306 q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
307 wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];
308 hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
309 for (y = 0; y < hp; y++) {
311 p += src_linesize[plane];
312 q += dst_linesize[plane];
317 void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
318 uint8_t *dst[], int dst_linesize[],
319 int dst_x, int dst_y, int w, int h)
321 int plane, x, y, wp, hp;
323 FFDrawColor color_tmp = *color;
325 for (plane = 0; plane < draw->nb_planes; plane++) {
326 p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
327 wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]);
328 hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
333 if (HAVE_BIGENDIAN && draw->desc->comp[0].depth > 8) {
334 for (x = 0; 2*x < draw->pixelstep[plane]; x++)
335 color_tmp.comp[plane].u16[x] = av_bswap16(color_tmp.comp[plane].u16[x]);
338 /* copy first line from color */
339 for (x = 0; x < wp; x++) {
340 memcpy(p, color_tmp.comp[plane].u8, draw->pixelstep[plane]);
341 p += draw->pixelstep[plane];
343 wp *= draw->pixelstep[plane];
344 /* copy next lines from first line */
345 p = p0 + dst_linesize[plane];
346 for (y = 1; y < hp; y++) {
348 p += dst_linesize[plane];
354 * Clip interval [x; x+w[ within [0; wmax[.
355 * The resulting w may be negative if the final interval is empty.
356 * dx, if not null, return the difference between in and out value of x.
358 static void clip_interval(int wmax, int *x, int *w, int *dx)
373 * Decompose w pixels starting at x
374 * into start + (w starting at x) + end
375 * with x and w aligned on multiples of 1<<sub.
377 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
379 int mask = (1 << sub) - 1;
381 *start = (-*x) & mask;
383 *start = FFMIN(*start, *w);
389 static int component_used(FFDrawContext *draw, int plane, int comp)
391 return (draw->comp_mask[plane] >> comp) & 1;
394 /* If alpha is in the [ 0 ; 0x1010101 ] range,
395 then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,
396 and >> 24 gives a correct rounding. */
397 static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
398 int dx, int w, unsigned hsub, int left, int right)
400 unsigned asrc = alpha * src;
401 unsigned tau = 0x1010101 - alpha;
405 unsigned suba = (left * alpha) >> hsub;
406 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
409 for (x = 0; x < w; x++) {
410 *dst = (*dst * tau + asrc) >> 24;
414 unsigned suba = (right * alpha) >> hsub;
415 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
419 static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha,
420 int dx, int w, unsigned hsub, int left, int right)
422 unsigned asrc = alpha * src;
423 unsigned tau = 0x10001 - alpha;
427 unsigned suba = (left * alpha) >> hsub;
428 uint16_t value = AV_RL16(dst);
429 AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
432 for (x = 0; x < w; x++) {
433 uint16_t value = AV_RL16(dst);
434 AV_WL16(dst, (value * tau + asrc) >> 16);
438 unsigned suba = (right * alpha) >> hsub;
439 uint16_t value = AV_RL16(dst);
440 AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
444 void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
445 uint8_t *dst[], int dst_linesize[],
446 int dst_w, int dst_h,
447 int x0, int y0, int w, int h)
449 unsigned alpha, nb_planes, nb_comp, plane, comp;
450 int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
453 /* TODO optimize if alpha = 0xFF */
454 clip_interval(dst_w, &x0, &w, NULL);
455 clip_interval(dst_h, &y0, &h, NULL);
456 if (w <= 0 || h <= 0 || !color->rgba[3])
458 if (draw->desc->comp[0].depth <= 8) {
459 /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
460 alpha = 0x10203 * color->rgba[3] + 0x2;
462 /* 0x101 * alpha is in the [ 2 ; 0x1001] range */
463 alpha = 0x101 * color->rgba[3] + 0x2;
465 nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
466 nb_planes += !nb_planes;
467 for (plane = 0; plane < nb_planes; plane++) {
468 nb_comp = draw->pixelstep[plane];
469 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
474 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
475 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
476 for (comp = 0; comp < nb_comp; comp++) {
477 const int depth = draw->desc->comp[comp].depth;
479 if (!component_used(draw, plane, comp))
484 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
485 draw->pixelstep[plane], w_sub,
486 draw->hsub[plane], left, right);
488 blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
489 draw->pixelstep[plane], w_sub,
490 draw->hsub[plane], left, right);
492 p += dst_linesize[plane];
495 for (y = 0; y < h_sub; y++) {
496 blend_line(p, color->comp[plane].u8[comp], alpha,
497 draw->pixelstep[plane], w_sub,
498 draw->hsub[plane], left, right);
499 p += dst_linesize[plane];
502 for (y = 0; y < h_sub; y++) {
503 blend_line16(p, color->comp[plane].u16[comp], alpha,
504 draw->pixelstep[plane], w_sub,
505 draw->hsub[plane], left, right);
506 p += dst_linesize[plane];
511 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
512 draw->pixelstep[plane], w_sub,
513 draw->hsub[plane], left, right);
515 blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
516 draw->pixelstep[plane], w_sub,
517 draw->hsub[plane], left, right);
524 static void blend_pixel16(uint8_t *dst, unsigned src, unsigned alpha,
525 const uint8_t *mask, int mask_linesize, int l2depth,
526 unsigned w, unsigned h, unsigned shift, unsigned xm0)
528 unsigned xm, x, y, t = 0;
529 unsigned xmshf = 3 - l2depth;
530 unsigned xmmod = 7 >> l2depth;
531 unsigned mbits = (1 << (1 << l2depth)) - 1;
532 unsigned mmult = 255 / mbits;
533 uint16_t value = AV_RL16(dst);
535 for (y = 0; y < h; y++) {
537 for (x = 0; x < w; x++) {
538 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
542 mask += mask_linesize;
544 alpha = (t >> shift) * alpha;
545 AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16);
548 static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
549 const uint8_t *mask, int mask_linesize, int l2depth,
550 unsigned w, unsigned h, unsigned shift, unsigned xm0)
552 unsigned xm, x, y, t = 0;
553 unsigned xmshf = 3 - l2depth;
554 unsigned xmmod = 7 >> l2depth;
555 unsigned mbits = (1 << (1 << l2depth)) - 1;
556 unsigned mmult = 255 / mbits;
558 for (y = 0; y < h; y++) {
560 for (x = 0; x < w; x++) {
561 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
565 mask += mask_linesize;
567 alpha = (t >> shift) * alpha;
568 *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
571 static void blend_line_hv16(uint8_t *dst, int dst_delta,
572 unsigned src, unsigned alpha,
573 const uint8_t *mask, int mask_linesize, int l2depth, int w,
574 unsigned hsub, unsigned vsub,
575 int xm, int left, int right, int hband)
580 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
581 left, hband, hsub + vsub, xm);
585 for (x = 0; x < w; x++) {
586 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
587 1 << hsub, hband, hsub + vsub, xm);
592 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
593 right, hband, hsub + vsub, xm);
596 static void blend_line_hv(uint8_t *dst, int dst_delta,
597 unsigned src, unsigned alpha,
598 const uint8_t *mask, int mask_linesize, int l2depth, int w,
599 unsigned hsub, unsigned vsub,
600 int xm, int left, int right, int hband)
605 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
606 left, hband, hsub + vsub, xm);
610 for (x = 0; x < w; x++) {
611 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
612 1 << hsub, hband, hsub + vsub, xm);
617 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
618 right, hband, hsub + vsub, xm);
621 void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
622 uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
623 const uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
624 int l2depth, unsigned endianness, int x0, int y0)
626 unsigned alpha, nb_planes, nb_comp, plane, comp;
627 int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
631 clip_interval(dst_w, &x0, &mask_w, &xm0);
632 clip_interval(dst_h, &y0, &mask_h, &ym0);
633 mask += ym0 * mask_linesize;
634 if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])
636 if (draw->desc->comp[0].depth <= 8) {
637 /* alpha is in the [ 0 ; 0x10203 ] range,
638 alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
639 alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
641 alpha = (0x101 * color->rgba[3] + 0x2) >> 8;
643 nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
644 nb_planes += !nb_planes;
645 for (plane = 0; plane < nb_planes; plane++) {
646 nb_comp = draw->pixelstep[plane];
647 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
652 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
653 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
654 for (comp = 0; comp < nb_comp; comp++) {
655 const int depth = draw->desc->comp[comp].depth;
657 if (!component_used(draw, plane, comp))
663 blend_line_hv(p, draw->pixelstep[plane],
664 color->comp[plane].u8[comp], alpha,
665 m, mask_linesize, l2depth, w_sub,
666 draw->hsub[plane], draw->vsub[plane],
667 xm0, left, right, top);
669 blend_line_hv16(p, draw->pixelstep[plane],
670 color->comp[plane].u16[comp], alpha,
671 m, mask_linesize, l2depth, w_sub,
672 draw->hsub[plane], draw->vsub[plane],
673 xm0, left, right, top);
675 p += dst_linesize[plane];
676 m += top * mask_linesize;
679 for (y = 0; y < h_sub; y++) {
680 blend_line_hv(p, draw->pixelstep[plane],
681 color->comp[plane].u8[comp], alpha,
682 m, mask_linesize, l2depth, w_sub,
683 draw->hsub[plane], draw->vsub[plane],
684 xm0, left, right, 1 << draw->vsub[plane]);
685 p += dst_linesize[plane];
686 m += mask_linesize << draw->vsub[plane];
689 for (y = 0; y < h_sub; y++) {
690 blend_line_hv16(p, draw->pixelstep[plane],
691 color->comp[plane].u16[comp], alpha,
692 m, mask_linesize, l2depth, w_sub,
693 draw->hsub[plane], draw->vsub[plane],
694 xm0, left, right, 1 << draw->vsub[plane]);
695 p += dst_linesize[plane];
696 m += mask_linesize << draw->vsub[plane];
701 blend_line_hv(p, draw->pixelstep[plane],
702 color->comp[plane].u8[comp], alpha,
703 m, mask_linesize, l2depth, w_sub,
704 draw->hsub[plane], draw->vsub[plane],
705 xm0, left, right, bottom);
707 blend_line_hv16(p, draw->pixelstep[plane],
708 color->comp[plane].u16[comp], alpha,
709 m, mask_linesize, l2depth, w_sub,
710 draw->hsub[plane], draw->vsub[plane],
711 xm0, left, right, bottom);
718 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
721 unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
726 value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
727 return (value >> shift) << shift;
730 AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)
732 enum AVPixelFormat i;
734 AVFilterFormats *fmts = NULL;
737 for (i = 0; av_pix_fmt_desc_get(i); i++)
738 if (ff_draw_init(&draw, i, flags) >= 0 &&
739 (ret = ff_add_format(&fmts, i)) < 0)