| 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/avutil.h" |
| 25 | #include "libavutil/colorspace.h" |
| 26 | #include "libavutil/mem.h" |
| 27 | #include "libavutil/pixdesc.h" |
| 28 | #include "drawutils.h" |
| 29 | #include "formats.h" |
| 30 | |
| 31 | enum { RED = 0, GREEN, BLUE, ALPHA }; |
| 32 | |
| 33 | int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt) |
| 34 | { |
| 35 | switch (pix_fmt) { |
| 36 | case AV_PIX_FMT_0RGB: |
| 37 | case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break; |
| 38 | case AV_PIX_FMT_0BGR: |
| 39 | case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break; |
| 40 | case AV_PIX_FMT_RGB48LE: |
| 41 | case AV_PIX_FMT_RGB48BE: |
| 42 | case AV_PIX_FMT_RGBA64BE: |
| 43 | case AV_PIX_FMT_RGBA64LE: |
| 44 | case AV_PIX_FMT_RGB0: |
| 45 | case AV_PIX_FMT_RGBA: |
| 46 | case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break; |
| 47 | case AV_PIX_FMT_BGR48LE: |
| 48 | case AV_PIX_FMT_BGR48BE: |
| 49 | case AV_PIX_FMT_BGRA64BE: |
| 50 | case AV_PIX_FMT_BGRA64LE: |
| 51 | case AV_PIX_FMT_BGRA: |
| 52 | case AV_PIX_FMT_BGR0: |
| 53 | case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break; |
| 54 | case AV_PIX_FMT_GBRAP: |
| 55 | case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break; |
| 56 | default: /* unsupported */ |
| 57 | return AVERROR(EINVAL); |
| 58 | } |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4], |
| 63 | enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], |
| 64 | int *is_packed_rgba, uint8_t rgba_map_ptr[4]) |
| 65 | { |
| 66 | uint8_t rgba_map[4] = {0}; |
| 67 | int i; |
| 68 | const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt); |
| 69 | int hsub = pix_desc->log2_chroma_w; |
| 70 | |
| 71 | *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0; |
| 72 | |
| 73 | if (*is_packed_rgba) { |
| 74 | pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3; |
| 75 | for (i = 0; i < 4; i++) |
| 76 | dst_color[rgba_map[i]] = rgba_color[i]; |
| 77 | |
| 78 | line[0] = av_malloc(w * pixel_step[0]); |
| 79 | for (i = 0; i < w; i++) |
| 80 | memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]); |
| 81 | if (rgba_map_ptr) |
| 82 | memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4); |
| 83 | } else { |
| 84 | int plane; |
| 85 | |
| 86 | dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]); |
| 87 | dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); |
| 88 | dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); |
| 89 | dst_color[3] = rgba_color[3]; |
| 90 | |
| 91 | for (plane = 0; plane < 4; plane++) { |
| 92 | int line_size; |
| 93 | int hsub1 = (plane == 1 || plane == 2) ? hsub : 0; |
| 94 | |
| 95 | pixel_step[plane] = 1; |
| 96 | line_size = FF_CEIL_RSHIFT(w, hsub1) * pixel_step[plane]; |
| 97 | line[plane] = av_malloc(line_size); |
| 98 | memset(line[plane], dst_color[plane], line_size); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4], |
| 106 | uint8_t *src[4], int pixelstep[4], |
| 107 | int hsub, int vsub, int x, int y, int w, int h) |
| 108 | { |
| 109 | int i, plane; |
| 110 | uint8_t *p; |
| 111 | |
| 112 | for (plane = 0; plane < 4 && dst[plane]; plane++) { |
| 113 | int hsub1 = plane == 1 || plane == 2 ? hsub : 0; |
| 114 | int vsub1 = plane == 1 || plane == 2 ? vsub : 0; |
| 115 | int width = FF_CEIL_RSHIFT(w, hsub1); |
| 116 | int height = FF_CEIL_RSHIFT(h, vsub1); |
| 117 | |
| 118 | p = dst[plane] + (y >> vsub1) * dst_linesize[plane]; |
| 119 | for (i = 0; i < height; i++) { |
| 120 | memcpy(p + (x >> hsub1) * pixelstep[plane], |
| 121 | src[plane], width * pixelstep[plane]); |
| 122 | p += dst_linesize[plane]; |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4], |
| 128 | uint8_t *src[4], int src_linesize[4], int pixelstep[4], |
| 129 | int hsub, int vsub, int x, int y, int y2, int w, int h) |
| 130 | { |
| 131 | int i, plane; |
| 132 | uint8_t *p; |
| 133 | |
| 134 | for (plane = 0; plane < 4 && dst[plane]; plane++) { |
| 135 | int hsub1 = plane == 1 || plane == 2 ? hsub : 0; |
| 136 | int vsub1 = plane == 1 || plane == 2 ? vsub : 0; |
| 137 | int width = FF_CEIL_RSHIFT(w, hsub1); |
| 138 | int height = FF_CEIL_RSHIFT(h, vsub1); |
| 139 | |
| 140 | p = dst[plane] + (y >> vsub1) * dst_linesize[plane]; |
| 141 | for (i = 0; i < height; i++) { |
| 142 | memcpy(p + (x >> hsub1) * pixelstep[plane], |
| 143 | src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), width * pixelstep[plane]); |
| 144 | p += dst_linesize[plane]; |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags) |
| 150 | { |
| 151 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format); |
| 152 | const AVComponentDescriptor *c; |
| 153 | unsigned i, nb_planes = 0; |
| 154 | int pixelstep[MAX_PLANES] = { 0 }; |
| 155 | |
| 156 | if (!desc->name) |
| 157 | return AVERROR(EINVAL); |
| 158 | if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA)) |
| 159 | return AVERROR(ENOSYS); |
| 160 | for (i = 0; i < desc->nb_components; i++) { |
| 161 | c = &desc->comp[i]; |
| 162 | /* for now, only 8-bits formats */ |
| 163 | if (c->depth_minus1 != 8 - 1) |
| 164 | return AVERROR(ENOSYS); |
| 165 | if (c->plane >= MAX_PLANES) |
| 166 | return AVERROR(ENOSYS); |
| 167 | /* strange interleaving */ |
| 168 | if (pixelstep[c->plane] != 0 && |
| 169 | pixelstep[c->plane] != c->step_minus1 + 1) |
| 170 | return AVERROR(ENOSYS); |
| 171 | pixelstep[c->plane] = c->step_minus1 + 1; |
| 172 | if (pixelstep[c->plane] >= 8) |
| 173 | return AVERROR(ENOSYS); |
| 174 | nb_planes = FFMAX(nb_planes, c->plane + 1); |
| 175 | } |
| 176 | if ((desc->log2_chroma_w || desc->log2_chroma_h) && nb_planes < 3) |
| 177 | return AVERROR(ENOSYS); /* exclude NV12 and NV21 */ |
| 178 | memset(draw, 0, sizeof(*draw)); |
| 179 | draw->desc = desc; |
| 180 | draw->format = format; |
| 181 | draw->nb_planes = nb_planes; |
| 182 | memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep)); |
| 183 | draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w; |
| 184 | draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h; |
| 185 | for (i = 0; i < ((desc->nb_components - 1) | 1); i++) |
| 186 | draw->comp_mask[desc->comp[i].plane] |= |
| 187 | 1 << (desc->comp[i].offset_plus1 - 1); |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]) |
| 192 | { |
| 193 | unsigned i; |
| 194 | uint8_t rgba_map[4]; |
| 195 | |
| 196 | if (rgba != color->rgba) |
| 197 | memcpy(color->rgba, rgba, sizeof(color->rgba)); |
| 198 | if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) && |
| 199 | ff_fill_rgba_map(rgba_map, draw->format) >= 0) { |
| 200 | if (draw->nb_planes == 1) { |
| 201 | for (i = 0; i < 4; i++) |
| 202 | color->comp[0].u8[rgba_map[i]] = rgba[i]; |
| 203 | } else { |
| 204 | for (i = 0; i < 4; i++) |
| 205 | color->comp[rgba_map[i]].u8[0] = rgba[i]; |
| 206 | } |
| 207 | } else if (draw->nb_planes == 3 || draw->nb_planes == 4) { |
| 208 | /* assume YUV */ |
| 209 | color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); |
| 210 | color->comp[1].u8[0] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); |
| 211 | color->comp[2].u8[0] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); |
| 212 | color->comp[3].u8[0] = rgba[3]; |
| 213 | } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A) { |
| 214 | color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); |
| 215 | color->comp[1].u8[0] = rgba[3]; |
| 216 | } else { |
| 217 | av_log(NULL, AV_LOG_WARNING, |
| 218 | "Color conversion not implemented for %s\n", draw->desc->name); |
| 219 | memset(color, 128, sizeof(*color)); |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[], |
| 224 | int plane, int x, int y) |
| 225 | { |
| 226 | return data[plane] + |
| 227 | (y >> draw->vsub[plane]) * linesize[plane] + |
| 228 | (x >> draw->hsub[plane]) * draw->pixelstep[plane]; |
| 229 | } |
| 230 | |
| 231 | void ff_copy_rectangle2(FFDrawContext *draw, |
| 232 | uint8_t *dst[], int dst_linesize[], |
| 233 | uint8_t *src[], int src_linesize[], |
| 234 | int dst_x, int dst_y, int src_x, int src_y, |
| 235 | int w, int h) |
| 236 | { |
| 237 | int plane, y, wp, hp; |
| 238 | uint8_t *p, *q; |
| 239 | |
| 240 | for (plane = 0; plane < draw->nb_planes; plane++) { |
| 241 | p = pointer_at(draw, src, src_linesize, plane, src_x, src_y); |
| 242 | q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y); |
| 243 | wp = FF_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane]; |
| 244 | hp = FF_CEIL_RSHIFT(h, draw->vsub[plane]); |
| 245 | for (y = 0; y < hp; y++) { |
| 246 | memcpy(q, p, wp); |
| 247 | p += src_linesize[plane]; |
| 248 | q += dst_linesize[plane]; |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, |
| 254 | uint8_t *dst[], int dst_linesize[], |
| 255 | int dst_x, int dst_y, int w, int h) |
| 256 | { |
| 257 | int plane, x, y, wp, hp; |
| 258 | uint8_t *p0, *p; |
| 259 | |
| 260 | for (plane = 0; plane < draw->nb_planes; plane++) { |
| 261 | p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y); |
| 262 | wp = FF_CEIL_RSHIFT(w, draw->hsub[plane]); |
| 263 | hp = FF_CEIL_RSHIFT(h, draw->vsub[plane]); |
| 264 | if (!hp) |
| 265 | return; |
| 266 | p = p0; |
| 267 | /* copy first line from color */ |
| 268 | for (x = 0; x < wp; x++) { |
| 269 | memcpy(p, color->comp[plane].u8, draw->pixelstep[plane]); |
| 270 | p += draw->pixelstep[plane]; |
| 271 | } |
| 272 | wp *= draw->pixelstep[plane]; |
| 273 | /* copy next lines from first line */ |
| 274 | p = p0 + dst_linesize[plane]; |
| 275 | for (y = 1; y < hp; y++) { |
| 276 | memcpy(p, p0, wp); |
| 277 | p += dst_linesize[plane]; |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * Clip interval [x; x+w[ within [0; wmax[. |
| 284 | * The resulting w may be negative if the final interval is empty. |
| 285 | * dx, if not null, return the difference between in and out value of x. |
| 286 | */ |
| 287 | static void clip_interval(int wmax, int *x, int *w, int *dx) |
| 288 | { |
| 289 | if (dx) |
| 290 | *dx = 0; |
| 291 | if (*x < 0) { |
| 292 | if (dx) |
| 293 | *dx = -*x; |
| 294 | *w += *x; |
| 295 | *x = 0; |
| 296 | } |
| 297 | if (*x + *w > wmax) |
| 298 | *w = wmax - *x; |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * Decompose w pixels starting at x |
| 303 | * into start + (w starting at x) + end |
| 304 | * with x and w aligned on multiples of 1<<sub. |
| 305 | */ |
| 306 | static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end) |
| 307 | { |
| 308 | int mask = (1 << sub) - 1; |
| 309 | |
| 310 | *start = (-*x) & mask; |
| 311 | *x += *start; |
| 312 | *start = FFMIN(*start, *w); |
| 313 | *w -= *start; |
| 314 | *end = *w & mask; |
| 315 | *w >>= sub; |
| 316 | } |
| 317 | |
| 318 | static int component_used(FFDrawContext *draw, int plane, int comp) |
| 319 | { |
| 320 | return (draw->comp_mask[plane] >> comp) & 1; |
| 321 | } |
| 322 | |
| 323 | /* If alpha is in the [ 0 ; 0x1010101 ] range, |
| 324 | then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range, |
| 325 | and >> 24 gives a correct rounding. */ |
| 326 | static void blend_line(uint8_t *dst, unsigned src, unsigned alpha, |
| 327 | int dx, int w, unsigned hsub, int left, int right) |
| 328 | { |
| 329 | unsigned asrc = alpha * src; |
| 330 | unsigned tau = 0x1010101 - alpha; |
| 331 | int x; |
| 332 | |
| 333 | if (left) { |
| 334 | unsigned suba = (left * alpha) >> hsub; |
| 335 | *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24; |
| 336 | dst += dx; |
| 337 | } |
| 338 | for (x = 0; x < w; x++) { |
| 339 | *dst = (*dst * tau + asrc) >> 24; |
| 340 | dst += dx; |
| 341 | } |
| 342 | if (right) { |
| 343 | unsigned suba = (right * alpha) >> hsub; |
| 344 | *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24; |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color, |
| 349 | uint8_t *dst[], int dst_linesize[], |
| 350 | int dst_w, int dst_h, |
| 351 | int x0, int y0, int w, int h) |
| 352 | { |
| 353 | unsigned alpha, nb_planes, nb_comp, plane, comp; |
| 354 | int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y; |
| 355 | uint8_t *p0, *p; |
| 356 | |
| 357 | /* TODO optimize if alpha = 0xFF */ |
| 358 | clip_interval(dst_w, &x0, &w, NULL); |
| 359 | clip_interval(dst_h, &y0, &h, NULL); |
| 360 | if (w <= 0 || h <= 0 || !color->rgba[3]) |
| 361 | return; |
| 362 | /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */ |
| 363 | alpha = 0x10203 * color->rgba[3] + 0x2; |
| 364 | nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */ |
| 365 | for (plane = 0; plane < nb_planes; plane++) { |
| 366 | nb_comp = draw->pixelstep[plane]; |
| 367 | p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0); |
| 368 | w_sub = w; |
| 369 | h_sub = h; |
| 370 | x_sub = x0; |
| 371 | y_sub = y0; |
| 372 | subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right); |
| 373 | subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom); |
| 374 | for (comp = 0; comp < nb_comp; comp++) { |
| 375 | if (!component_used(draw, plane, comp)) |
| 376 | continue; |
| 377 | p = p0 + comp; |
| 378 | if (top) { |
| 379 | blend_line(p, color->comp[plane].u8[comp], alpha >> 1, |
| 380 | draw->pixelstep[plane], w_sub, |
| 381 | draw->hsub[plane], left, right); |
| 382 | p += dst_linesize[plane]; |
| 383 | } |
| 384 | for (y = 0; y < h_sub; y++) { |
| 385 | blend_line(p, color->comp[plane].u8[comp], alpha, |
| 386 | draw->pixelstep[plane], w_sub, |
| 387 | draw->hsub[plane], left, right); |
| 388 | p += dst_linesize[plane]; |
| 389 | } |
| 390 | if (bottom) |
| 391 | blend_line(p, color->comp[plane].u8[comp], alpha >> 1, |
| 392 | draw->pixelstep[plane], w_sub, |
| 393 | draw->hsub[plane], left, right); |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha, |
| 399 | uint8_t *mask, int mask_linesize, int l2depth, |
| 400 | unsigned w, unsigned h, unsigned shift, unsigned xm0) |
| 401 | { |
| 402 | unsigned xm, x, y, t = 0; |
| 403 | unsigned xmshf = 3 - l2depth; |
| 404 | unsigned xmmod = 7 >> l2depth; |
| 405 | unsigned mbits = (1 << (1 << l2depth)) - 1; |
| 406 | unsigned mmult = 255 / mbits; |
| 407 | |
| 408 | for (y = 0; y < h; y++) { |
| 409 | xm = xm0; |
| 410 | for (x = 0; x < w; x++) { |
| 411 | t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits) |
| 412 | * mmult; |
| 413 | xm++; |
| 414 | } |
| 415 | mask += mask_linesize; |
| 416 | } |
| 417 | alpha = (t >> shift) * alpha; |
| 418 | *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24; |
| 419 | } |
| 420 | |
| 421 | static void blend_line_hv(uint8_t *dst, int dst_delta, |
| 422 | unsigned src, unsigned alpha, |
| 423 | uint8_t *mask, int mask_linesize, int l2depth, int w, |
| 424 | unsigned hsub, unsigned vsub, |
| 425 | int xm, int left, int right, int hband) |
| 426 | { |
| 427 | int x; |
| 428 | |
| 429 | if (left) { |
| 430 | blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, |
| 431 | left, hband, hsub + vsub, xm); |
| 432 | dst += dst_delta; |
| 433 | xm += left; |
| 434 | } |
| 435 | for (x = 0; x < w; x++) { |
| 436 | blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, |
| 437 | 1 << hsub, hband, hsub + vsub, xm); |
| 438 | dst += dst_delta; |
| 439 | xm += 1 << hsub; |
| 440 | } |
| 441 | if (right) |
| 442 | blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, |
| 443 | right, hband, hsub + vsub, xm); |
| 444 | } |
| 445 | |
| 446 | void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color, |
| 447 | uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, |
| 448 | uint8_t *mask, int mask_linesize, int mask_w, int mask_h, |
| 449 | int l2depth, unsigned endianness, int x0, int y0) |
| 450 | { |
| 451 | unsigned alpha, nb_planes, nb_comp, plane, comp; |
| 452 | int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y; |
| 453 | uint8_t *p0, *p, *m; |
| 454 | |
| 455 | clip_interval(dst_w, &x0, &mask_w, &xm0); |
| 456 | clip_interval(dst_h, &y0, &mask_h, &ym0); |
| 457 | mask += ym0 * mask_linesize; |
| 458 | if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3]) |
| 459 | return; |
| 460 | /* alpha is in the [ 0 ; 0x10203 ] range, |
| 461 | alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */ |
| 462 | alpha = (0x10307 * color->rgba[3] + 0x3) >> 8; |
| 463 | nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */ |
| 464 | for (plane = 0; plane < nb_planes; plane++) { |
| 465 | nb_comp = draw->pixelstep[plane]; |
| 466 | p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0); |
| 467 | w_sub = mask_w; |
| 468 | h_sub = mask_h; |
| 469 | x_sub = x0; |
| 470 | y_sub = y0; |
| 471 | subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right); |
| 472 | subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom); |
| 473 | for (comp = 0; comp < nb_comp; comp++) { |
| 474 | if (!component_used(draw, plane, comp)) |
| 475 | continue; |
| 476 | p = p0 + comp; |
| 477 | m = mask; |
| 478 | if (top) { |
| 479 | blend_line_hv(p, draw->pixelstep[plane], |
| 480 | color->comp[plane].u8[comp], alpha, |
| 481 | m, mask_linesize, l2depth, w_sub, |
| 482 | draw->hsub[plane], draw->vsub[plane], |
| 483 | xm0, left, right, top); |
| 484 | p += dst_linesize[plane]; |
| 485 | m += top * mask_linesize; |
| 486 | } |
| 487 | for (y = 0; y < h_sub; y++) { |
| 488 | blend_line_hv(p, draw->pixelstep[plane], |
| 489 | color->comp[plane].u8[comp], alpha, |
| 490 | m, mask_linesize, l2depth, w_sub, |
| 491 | draw->hsub[plane], draw->vsub[plane], |
| 492 | xm0, left, right, 1 << draw->vsub[plane]); |
| 493 | p += dst_linesize[plane]; |
| 494 | m += mask_linesize << draw->vsub[plane]; |
| 495 | } |
| 496 | if (bottom) |
| 497 | blend_line_hv(p, draw->pixelstep[plane], |
| 498 | color->comp[plane].u8[comp], alpha, |
| 499 | m, mask_linesize, l2depth, w_sub, |
| 500 | draw->hsub[plane], draw->vsub[plane], |
| 501 | xm0, left, right, bottom); |
| 502 | } |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, |
| 507 | int value) |
| 508 | { |
| 509 | unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max; |
| 510 | |
| 511 | if (!shift) |
| 512 | return value; |
| 513 | if (round_dir >= 0) |
| 514 | value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1); |
| 515 | return (value >> shift) << shift; |
| 516 | } |
| 517 | |
| 518 | AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags) |
| 519 | { |
| 520 | enum AVPixelFormat i; |
| 521 | FFDrawContext draw; |
| 522 | AVFilterFormats *fmts = NULL; |
| 523 | |
| 524 | for (i = 0; av_pix_fmt_desc_get(i); i++) |
| 525 | if (ff_draw_init(&draw, i, flags) >= 0) |
| 526 | ff_add_format(&fmts, i); |
| 527 | return fmts; |
| 528 | } |
| 529 | |
| 530 | #ifdef TEST |
| 531 | |
| 532 | #undef printf |
| 533 | |
| 534 | int main(void) |
| 535 | { |
| 536 | enum AVPixelFormat f; |
| 537 | const AVPixFmtDescriptor *desc; |
| 538 | FFDrawContext draw; |
| 539 | FFDrawColor color; |
| 540 | int r, i; |
| 541 | |
| 542 | for (f = 0; av_pix_fmt_desc_get(f); f++) { |
| 543 | desc = av_pix_fmt_desc_get(f); |
| 544 | if (!desc->name) |
| 545 | continue; |
| 546 | printf("Testing %s...%*s", desc->name, |
| 547 | (int)(16 - strlen(desc->name)), ""); |
| 548 | r = ff_draw_init(&draw, f, 0); |
| 549 | if (r < 0) { |
| 550 | char buf[128]; |
| 551 | av_strerror(r, buf, sizeof(buf)); |
| 552 | printf("no: %s\n", buf); |
| 553 | continue; |
| 554 | } |
| 555 | ff_draw_color(&draw, &color, (uint8_t[]) { 1, 0, 0, 1 }); |
| 556 | for (i = 0; i < sizeof(color); i++) |
| 557 | if (((uint8_t *)&color)[i] != 128) |
| 558 | break; |
| 559 | if (i == sizeof(color)) { |
| 560 | printf("fallback color\n"); |
| 561 | continue; |
| 562 | } |
| 563 | printf("ok\n"); |
| 564 | } |
| 565 | return 0; |
| 566 | } |
| 567 | |
| 568 | #endif |