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 };
185 if (!desc || !desc->name)
186 return AVERROR(EINVAL);
187 if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA))
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++) {
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 &&
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);
212 memset(draw, 0, sizeof(*draw));
214 draw->format = format;
215 draw->nb_planes = nb_planes;
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;
226 void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
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;
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);
249 } else if (draw->nb_planes >= 2) {
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)
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]);
273 color->comp[1].u8[0] = rgba[3];
276 av_log(NULL, AV_LOG_WARNING,
277 "Color conversion not implemented for %s\n", draw->desc->name);
278 memset(color, 128, sizeof(*color));
282 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
283 int plane, int x, int y)
286 (y >> draw->vsub[plane]) * linesize[plane] +
287 (x >> draw->hsub[plane]) * draw->pixelstep[plane];
290 void ff_copy_rectangle2(FFDrawContext *draw,
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,
296 int plane, y, wp, hp;
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++) {
306 p += src_linesize[plane];
307 q += dst_linesize[plane];
312 void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
313 uint8_t *dst[], int dst_linesize[],
314 int dst_x, int dst_y, int w, int h)
316 int plane, x, y, wp, hp;
318 FFDrawColor color_tmp = *color;
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]);
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]);
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];
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++) {
343 p += dst_linesize[plane];
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.
353 static void clip_interval(int wmax, int *x, int *w, int *dx)
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.
372 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
374 int mask = (1 << sub) - 1;
376 *start = (-*x) & mask;
378 *start = FFMIN(*start, *w);
384 static int component_used(FFDrawContext *draw, int plane, int comp)
386 return (draw->comp_mask[plane] >> comp) & 1;
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)
395 unsigned asrc = alpha * src;
396 unsigned tau = 0x1010101 - alpha;
400 unsigned suba = (left * alpha) >> hsub;
401 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
404 for (x = 0; x < w; x++) {
405 *dst = (*dst * tau + asrc) >> 24;
409 unsigned suba = (right * alpha) >> hsub;
410 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
414 static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha,
415 int dx, int w, unsigned hsub, int left, int right)
417 unsigned asrc = alpha * src;
418 unsigned tau = 0x10001 - alpha;
422 unsigned suba = (left * alpha) >> hsub;
423 uint16_t value = AV_RL16(dst);
424 AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
427 for (x = 0; x < w; x++) {
428 uint16_t value = AV_RL16(dst);
429 AV_WL16(dst, (value * tau + asrc) >> 16);
433 unsigned suba = (right * alpha) >> hsub;
434 uint16_t value = AV_RL16(dst);
435 AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
439 void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
440 uint8_t *dst[], int dst_linesize[],
441 int dst_w, int dst_h,
442 int x0, int y0, int w, int h)
444 unsigned alpha, nb_planes, nb_comp, plane, comp;
445 int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
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])
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;
457 /* 0x101 * alpha is in the [ 2 ; 0x1001] range */
458 alpha = 0x101 * color->rgba[3] + 0x2;
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);
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;
474 if (!component_used(draw, plane, comp))
479 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
480 draw->pixelstep[plane], w_sub,
481 draw->hsub[plane], left, right);
483 blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
484 draw->pixelstep[plane], w_sub,
485 draw->hsub[plane], left, right);
487 p += dst_linesize[plane];
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];
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];
506 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
507 draw->pixelstep[plane], w_sub,
508 draw->hsub[plane], left, right);
510 blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
511 draw->pixelstep[plane], w_sub,
512 draw->hsub[plane], left, right);
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)
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);
530 for (y = 0; y < h; y++) {
532 for (x = 0; x < w; x++) {
533 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
537 mask += mask_linesize;
539 alpha = (t >> shift) * alpha;
540 AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16);
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)
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;
553 for (y = 0; y < h; y++) {
555 for (x = 0; x < w; x++) {
556 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
560 mask += mask_linesize;
562 alpha = (t >> shift) * alpha;
563 *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
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)
575 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
576 left, hband, hsub + vsub, xm);
580 for (x = 0; x < w; x++) {
581 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
582 1 << hsub, hband, hsub + vsub, xm);
587 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
588 right, hband, hsub + vsub, xm);
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)
600 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
601 left, hband, hsub + vsub, xm);
605 for (x = 0; x < w; x++) {
606 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
607 1 << hsub, hband, hsub + vsub, xm);
612 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
613 right, hband, hsub + vsub, xm);
616 void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
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)
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;
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])
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;
636 alpha = (0x101 * color->rgba[3] + 0x2) >> 8;
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);
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;
652 if (!component_used(draw, plane, comp))
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);
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);
670 p += dst_linesize[plane];
671 m += top * mask_linesize;
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];
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];
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);
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);
713 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
716 unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
721 value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
722 return (value >> shift) << shift;
725 AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)
727 enum AVPixelFormat i;
729 AVFilterFormats *fmts = NULL;
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)