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_GBRAP12LE:
68 case AV_PIX_FMT_GBRAP12BE:
69 case AV_PIX_FMT_GBRAP16LE:
70 case AV_PIX_FMT_GBRAP16BE:
71 case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
72 default: /* unsupported */
73 return AVERROR(EINVAL);
78 int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
79 enum AVPixelFormat pix_fmt, uint8_t rgba_color[4],
80 int *is_packed_rgba, uint8_t rgba_map_ptr[4])
82 uint8_t rgba_map[4] = {0};
84 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt);
89 hsub = pix_desc->log2_chroma_w;
91 *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
93 if (*is_packed_rgba) {
94 pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
95 for (i = 0; i < 4; i++)
96 dst_color[rgba_map[i]] = rgba_color[i];
98 line[0] = av_malloc_array(w, pixel_step[0]);
100 return AVERROR(ENOMEM);
101 for (i = 0; i < w; i++)
102 memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
104 memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
108 dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
109 dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
110 dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
111 dst_color[3] = rgba_color[3];
113 for (plane = 0; plane < 4; plane++) {
115 int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
117 pixel_step[plane] = 1;
118 line_size = AV_CEIL_RSHIFT(w, hsub1) * pixel_step[plane];
119 line[plane] = av_malloc(line_size);
121 while(plane && line[plane-1])
122 av_freep(&line[--plane]);
123 return AVERROR(ENOMEM);
125 memset(line[plane], dst_color[plane], line_size);
132 void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
133 uint8_t *src[4], int pixelstep[4],
134 int hsub, int vsub, int x, int y, int w, int h)
139 for (plane = 0; plane < 4 && dst[plane]; plane++) {
140 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
141 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
142 int width = AV_CEIL_RSHIFT(w, hsub1);
143 int height = AV_CEIL_RSHIFT(h, vsub1);
145 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
146 for (i = 0; i < height; i++) {
147 memcpy(p + (x >> hsub1) * pixelstep[plane],
148 src[plane], width * pixelstep[plane]);
149 p += dst_linesize[plane];
154 void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
155 uint8_t *src[4], int src_linesize[4], int pixelstep[4],
156 int hsub, int vsub, int x, int y, int y2, int w, int h)
161 for (plane = 0; plane < 4 && dst[plane]; plane++) {
162 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
163 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
164 int width = AV_CEIL_RSHIFT(w, hsub1);
165 int height = AV_CEIL_RSHIFT(h, vsub1);
167 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
168 for (i = 0; i < height; i++) {
169 memcpy(p + (x >> hsub1) * pixelstep[plane],
170 src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), width * pixelstep[plane]);
171 p += dst_linesize[plane];
176 int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
178 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
179 const AVComponentDescriptor *c;
180 unsigned i, nb_planes = 0;
181 int pixelstep[MAX_PLANES] = { 0 };
183 if (!desc || !desc->name)
184 return AVERROR(EINVAL);
185 if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA))
186 return AVERROR(ENOSYS);
187 if (format == AV_PIX_FMT_P010LE || format == AV_PIX_FMT_P010BE)
188 return AVERROR(ENOSYS);
189 for (i = 0; i < desc->nb_components; i++) {
191 /* for now, only 8-16 bits formats */
192 if (c->depth < 8 || c->depth > 16)
193 return AVERROR(ENOSYS);
194 if (desc->flags & AV_PIX_FMT_FLAG_BE)
195 return AVERROR(ENOSYS);
196 if (c->plane >= MAX_PLANES)
197 return AVERROR(ENOSYS);
198 /* strange interleaving */
199 if (pixelstep[c->plane] != 0 &&
200 pixelstep[c->plane] != c->step)
201 return AVERROR(ENOSYS);
202 if (pixelstep[c->plane] == 6 &&
204 return AVERROR(ENOSYS);
205 pixelstep[c->plane] = c->step;
206 if (pixelstep[c->plane] >= 8)
207 return AVERROR(ENOSYS);
208 nb_planes = FFMAX(nb_planes, c->plane + 1);
210 memset(draw, 0, sizeof(*draw));
212 draw->format = format;
213 draw->nb_planes = nb_planes;
214 memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
215 draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
216 draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
217 for (i = 0; i < (desc->nb_components - !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA)); i++)
218 draw->comp_mask[desc->comp[i].plane] |=
219 1 << desc->comp[i].offset;
223 void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
228 if (rgba != color->rgba)
229 memcpy(color->rgba, rgba, sizeof(color->rgba));
230 if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) &&
231 ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
232 if (draw->nb_planes == 1) {
233 for (i = 0; i < 4; i++) {
234 color->comp[0].u8[rgba_map[i]] = rgba[i];
235 if (draw->desc->comp[rgba_map[i]].depth > 8) {
236 color->comp[0].u16[rgba_map[i]] = color->comp[0].u8[rgba_map[i]] << 8;
240 for (i = 0; i < 4; i++) {
241 color->comp[rgba_map[i]].u8[0] = rgba[i];
242 if (draw->desc->comp[rgba_map[i]].depth > 8)
243 color->comp[rgba_map[i]].u16[0] = color->comp[rgba_map[i]].u8[0] << (draw->desc->comp[rgba_map[i]].depth - 8);
246 } else if (draw->nb_planes >= 2) {
248 const AVPixFmtDescriptor *desc = draw->desc;
249 color->comp[desc->comp[0].plane].u8[desc->comp[0].offset] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
250 color->comp[desc->comp[1].plane].u8[desc->comp[1].offset] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
251 color->comp[desc->comp[2].plane].u8[desc->comp[2].offset] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
252 color->comp[3].u8[0] = rgba[3];
253 #define EXPAND(compn) \
254 if (desc->comp[compn].depth > 8) \
255 color->comp[desc->comp[compn].plane].u16[desc->comp[compn].offset] = \
256 color->comp[desc->comp[compn].plane].u8[desc->comp[compn].offset] << \
257 (draw->desc->comp[compn].depth + draw->desc->comp[compn].shift - 8)
262 } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A) {
263 color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
264 color->comp[1].u8[0] = rgba[3];
265 } else if (draw->format == AV_PIX_FMT_GRAY16LE || draw->format == AV_PIX_FMT_YA16LE) {
266 color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
267 color->comp[0].u16[0] = color->comp[0].u8[0] << 8;
268 color->comp[1].u8[0] = rgba[3];
269 color->comp[1].u16[0] = color->comp[1].u8[0] << 8;
271 av_log(NULL, AV_LOG_WARNING,
272 "Color conversion not implemented for %s\n", draw->desc->name);
273 memset(color, 128, sizeof(*color));
277 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
278 int plane, int x, int y)
281 (y >> draw->vsub[plane]) * linesize[plane] +
282 (x >> draw->hsub[plane]) * draw->pixelstep[plane];
285 void ff_copy_rectangle2(FFDrawContext *draw,
286 uint8_t *dst[], int dst_linesize[],
287 uint8_t *src[], int src_linesize[],
288 int dst_x, int dst_y, int src_x, int src_y,
291 int plane, y, wp, hp;
294 for (plane = 0; plane < draw->nb_planes; plane++) {
295 p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
296 q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
297 wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];
298 hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
299 for (y = 0; y < hp; y++) {
301 p += src_linesize[plane];
302 q += dst_linesize[plane];
307 void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
308 uint8_t *dst[], int dst_linesize[],
309 int dst_x, int dst_y, int w, int h)
311 int plane, x, y, wp, hp;
313 FFDrawColor color_tmp = *color;
315 for (plane = 0; plane < draw->nb_planes; plane++) {
316 p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
317 wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]);
318 hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
323 if (HAVE_BIGENDIAN && draw->desc->comp[0].depth > 8) {
324 for (x = 0; 2*x < draw->pixelstep[plane]; x++)
325 color_tmp.comp[plane].u16[x] = av_bswap16(color_tmp.comp[plane].u16[x]);
328 /* copy first line from color */
329 for (x = 0; x < wp; x++) {
330 memcpy(p, color_tmp.comp[plane].u8, draw->pixelstep[plane]);
331 p += draw->pixelstep[plane];
333 wp *= draw->pixelstep[plane];
334 /* copy next lines from first line */
335 p = p0 + dst_linesize[plane];
336 for (y = 1; y < hp; y++) {
338 p += dst_linesize[plane];
344 * Clip interval [x; x+w[ within [0; wmax[.
345 * The resulting w may be negative if the final interval is empty.
346 * dx, if not null, return the difference between in and out value of x.
348 static void clip_interval(int wmax, int *x, int *w, int *dx)
363 * Decompose w pixels starting at x
364 * into start + (w starting at x) + end
365 * with x and w aligned on multiples of 1<<sub.
367 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
369 int mask = (1 << sub) - 1;
371 *start = (-*x) & mask;
373 *start = FFMIN(*start, *w);
379 static int component_used(FFDrawContext *draw, int plane, int comp)
381 return (draw->comp_mask[plane] >> comp) & 1;
384 /* If alpha is in the [ 0 ; 0x1010101 ] range,
385 then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,
386 and >> 24 gives a correct rounding. */
387 static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
388 int dx, int w, unsigned hsub, int left, int right)
390 unsigned asrc = alpha * src;
391 unsigned tau = 0x1010101 - alpha;
395 unsigned suba = (left * alpha) >> hsub;
396 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
399 for (x = 0; x < w; x++) {
400 *dst = (*dst * tau + asrc) >> 24;
404 unsigned suba = (right * alpha) >> hsub;
405 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
409 static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha,
410 int dx, int w, unsigned hsub, int left, int right)
412 unsigned asrc = alpha * src;
413 unsigned tau = 0x10001 - alpha;
417 unsigned suba = (left * alpha) >> hsub;
418 uint16_t value = AV_RL16(dst);
419 AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
422 for (x = 0; x < w; x++) {
423 uint16_t value = AV_RL16(dst);
424 AV_WL16(dst, (value * tau + asrc) >> 16);
428 unsigned suba = (right * alpha) >> hsub;
429 uint16_t value = AV_RL16(dst);
430 AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
434 void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
435 uint8_t *dst[], int dst_linesize[],
436 int dst_w, int dst_h,
437 int x0, int y0, int w, int h)
439 unsigned alpha, nb_planes, nb_comp, plane, comp;
440 int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
443 /* TODO optimize if alpha = 0xFF */
444 clip_interval(dst_w, &x0, &w, NULL);
445 clip_interval(dst_h, &y0, &h, NULL);
446 if (w <= 0 || h <= 0 || !color->rgba[3])
448 if (draw->desc->comp[0].depth <= 8) {
449 /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
450 alpha = 0x10203 * color->rgba[3] + 0x2;
452 /* 0x101 * alpha is in the [ 2 ; 0x1001] range */
453 alpha = 0x101 * color->rgba[3] + 0x2;
455 nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA);
456 nb_planes += !nb_planes;
457 for (plane = 0; plane < nb_planes; plane++) {
458 nb_comp = draw->pixelstep[plane];
459 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
464 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
465 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
466 for (comp = 0; comp < nb_comp; comp++) {
467 const int depth = draw->desc->comp[comp].depth;
469 if (!component_used(draw, plane, comp))
474 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
475 draw->pixelstep[plane], w_sub,
476 draw->hsub[plane], left, right);
478 blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
479 draw->pixelstep[plane], w_sub,
480 draw->hsub[plane], left, right);
482 p += dst_linesize[plane];
485 for (y = 0; y < h_sub; y++) {
486 blend_line(p, color->comp[plane].u8[comp], alpha,
487 draw->pixelstep[plane], w_sub,
488 draw->hsub[plane], left, right);
489 p += dst_linesize[plane];
492 for (y = 0; y < h_sub; y++) {
493 blend_line16(p, color->comp[plane].u16[comp], alpha,
494 draw->pixelstep[plane], w_sub,
495 draw->hsub[plane], left, right);
496 p += dst_linesize[plane];
501 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
502 draw->pixelstep[plane], w_sub,
503 draw->hsub[plane], left, right);
505 blend_line16(p, color->comp[plane].u16[comp], alpha >> 1,
506 draw->pixelstep[plane], w_sub,
507 draw->hsub[plane], left, right);
514 static void blend_pixel16(uint8_t *dst, unsigned src, unsigned alpha,
515 const uint8_t *mask, int mask_linesize, int l2depth,
516 unsigned w, unsigned h, unsigned shift, unsigned xm0)
518 unsigned xm, x, y, t = 0;
519 unsigned xmshf = 3 - l2depth;
520 unsigned xmmod = 7 >> l2depth;
521 unsigned mbits = (1 << (1 << l2depth)) - 1;
522 unsigned mmult = 255 / mbits;
523 uint16_t value = AV_RL16(dst);
525 for (y = 0; y < h; y++) {
527 for (x = 0; x < w; x++) {
528 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
532 mask += mask_linesize;
534 alpha = (t >> shift) * alpha;
535 AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16);
538 static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
539 const uint8_t *mask, int mask_linesize, int l2depth,
540 unsigned w, unsigned h, unsigned shift, unsigned xm0)
542 unsigned xm, x, y, t = 0;
543 unsigned xmshf = 3 - l2depth;
544 unsigned xmmod = 7 >> l2depth;
545 unsigned mbits = (1 << (1 << l2depth)) - 1;
546 unsigned mmult = 255 / mbits;
548 for (y = 0; y < h; y++) {
550 for (x = 0; x < w; x++) {
551 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
555 mask += mask_linesize;
557 alpha = (t >> shift) * alpha;
558 *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
561 static void blend_line_hv16(uint8_t *dst, int dst_delta,
562 unsigned src, unsigned alpha,
563 const uint8_t *mask, int mask_linesize, int l2depth, int w,
564 unsigned hsub, unsigned vsub,
565 int xm, int left, int right, int hband)
570 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
571 left, hband, hsub + vsub, xm);
575 for (x = 0; x < w; x++) {
576 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
577 1 << hsub, hband, hsub + vsub, xm);
582 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
583 right, hband, hsub + vsub, xm);
586 static void blend_line_hv(uint8_t *dst, int dst_delta,
587 unsigned src, unsigned alpha,
588 const uint8_t *mask, int mask_linesize, int l2depth, int w,
589 unsigned hsub, unsigned vsub,
590 int xm, int left, int right, int hband)
595 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
596 left, hband, hsub + vsub, xm);
600 for (x = 0; x < w; x++) {
601 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
602 1 << hsub, hband, hsub + vsub, xm);
607 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
608 right, hband, hsub + vsub, xm);
611 void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
612 uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
613 const uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
614 int l2depth, unsigned endianness, int x0, int y0)
616 unsigned alpha, nb_planes, nb_comp, plane, comp;
617 int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
621 clip_interval(dst_w, &x0, &mask_w, &xm0);
622 clip_interval(dst_h, &y0, &mask_h, &ym0);
623 mask += ym0 * mask_linesize;
624 if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])
626 if (draw->desc->comp[0].depth <= 8) {
627 /* alpha is in the [ 0 ; 0x10203 ] range,
628 alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
629 alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
631 alpha = (0x101 * color->rgba[3] + 0x2) >> 8;
633 nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA);
634 nb_planes += !nb_planes;
635 for (plane = 0; plane < nb_planes; plane++) {
636 nb_comp = draw->pixelstep[plane];
637 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
642 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
643 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
644 for (comp = 0; comp < nb_comp; comp++) {
645 const int depth = draw->desc->comp[comp].depth;
647 if (!component_used(draw, plane, comp))
653 blend_line_hv(p, draw->pixelstep[plane],
654 color->comp[plane].u8[comp], alpha,
655 m, mask_linesize, l2depth, w_sub,
656 draw->hsub[plane], draw->vsub[plane],
657 xm0, left, right, top);
659 blend_line_hv16(p, draw->pixelstep[plane],
660 color->comp[plane].u16[comp], alpha,
661 m, mask_linesize, l2depth, w_sub,
662 draw->hsub[plane], draw->vsub[plane],
663 xm0, left, right, top);
665 p += dst_linesize[plane];
666 m += top * mask_linesize;
669 for (y = 0; y < h_sub; y++) {
670 blend_line_hv(p, draw->pixelstep[plane],
671 color->comp[plane].u8[comp], alpha,
672 m, mask_linesize, l2depth, w_sub,
673 draw->hsub[plane], draw->vsub[plane],
674 xm0, left, right, 1 << draw->vsub[plane]);
675 p += dst_linesize[plane];
676 m += mask_linesize << draw->vsub[plane];
679 for (y = 0; y < h_sub; y++) {
680 blend_line_hv16(p, draw->pixelstep[plane],
681 color->comp[plane].u16[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];
691 blend_line_hv(p, draw->pixelstep[plane],
692 color->comp[plane].u8[comp], alpha,
693 m, mask_linesize, l2depth, w_sub,
694 draw->hsub[plane], draw->vsub[plane],
695 xm0, left, right, bottom);
697 blend_line_hv16(p, draw->pixelstep[plane],
698 color->comp[plane].u16[comp], alpha,
699 m, mask_linesize, l2depth, w_sub,
700 draw->hsub[plane], draw->vsub[plane],
701 xm0, left, right, bottom);
708 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
711 unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
716 value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
717 return (value >> shift) << shift;
720 AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)
722 enum AVPixelFormat i;
724 AVFilterFormats *fmts = NULL;
727 for (i = 0; av_pix_fmt_desc_get(i); i++)
728 if (ff_draw_init(&draw, i, flags) >= 0 &&
729 (ret = ff_add_format(&fmts, i)) < 0)