| /* |
| * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it> |
| * Copyright 2012 Nicolas George <nicolas.george normalesup org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <string.h> |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/avutil.h" |
| #include "libavutil/colorspace.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/pixdesc.h" |
| #include "drawutils.h" |
| #include "formats.h" |
| |
| enum { RED = 0, GREEN, BLUE, ALPHA }; |
| |
| int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt) |
| { |
| switch (pix_fmt) { |
| case AV_PIX_FMT_0RGB: |
| case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break; |
| case AV_PIX_FMT_0BGR: |
| case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break; |
| case AV_PIX_FMT_RGB48LE: |
| case AV_PIX_FMT_RGB48BE: |
| case AV_PIX_FMT_RGBA64BE: |
| case AV_PIX_FMT_RGBA64LE: |
| case AV_PIX_FMT_RGB0: |
| case AV_PIX_FMT_RGBA: |
| case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break; |
| case AV_PIX_FMT_BGR48LE: |
| case AV_PIX_FMT_BGR48BE: |
| case AV_PIX_FMT_BGRA64BE: |
| case AV_PIX_FMT_BGRA64LE: |
| case AV_PIX_FMT_BGRA: |
| case AV_PIX_FMT_BGR0: |
| case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break; |
| case AV_PIX_FMT_GBRP9LE: |
| case AV_PIX_FMT_GBRP9BE: |
| case AV_PIX_FMT_GBRP10LE: |
| case AV_PIX_FMT_GBRP10BE: |
| case AV_PIX_FMT_GBRP12LE: |
| case AV_PIX_FMT_GBRP12BE: |
| case AV_PIX_FMT_GBRP14LE: |
| case AV_PIX_FMT_GBRP14BE: |
| case AV_PIX_FMT_GBRP16LE: |
| case AV_PIX_FMT_GBRP16BE: |
| case AV_PIX_FMT_GBRAP: |
| case AV_PIX_FMT_GBRAP10LE: |
| case AV_PIX_FMT_GBRAP10BE: |
| case AV_PIX_FMT_GBRAP12LE: |
| case AV_PIX_FMT_GBRAP12BE: |
| case AV_PIX_FMT_GBRAP16LE: |
| case AV_PIX_FMT_GBRAP16BE: |
| case AV_PIX_FMT_GBRPF32LE: |
| case AV_PIX_FMT_GBRPF32BE: |
| case AV_PIX_FMT_GBRAPF32LE: |
| case AV_PIX_FMT_GBRAPF32BE: |
| case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break; |
| default: /* unsupported */ |
| return AVERROR(EINVAL); |
| } |
| return 0; |
| } |
| |
| int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags) |
| { |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format); |
| const AVComponentDescriptor *c; |
| unsigned i, nb_planes = 0; |
| int pixelstep[MAX_PLANES] = { 0 }; |
| int full_range = 0; |
| |
| if (!desc || !desc->name) |
| return AVERROR(EINVAL); |
| if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | FF_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA)) |
| return AVERROR(ENOSYS); |
| if (format == AV_PIX_FMT_P010LE || format == AV_PIX_FMT_P010BE || format == AV_PIX_FMT_P016LE || format == AV_PIX_FMT_P016BE) |
| return AVERROR(ENOSYS); |
| if (format == AV_PIX_FMT_YUVJ420P || format == AV_PIX_FMT_YUVJ422P || format == AV_PIX_FMT_YUVJ444P || |
| format == AV_PIX_FMT_YUVJ411P || format == AV_PIX_FMT_YUVJ440P) |
| full_range = 1; |
| for (i = 0; i < desc->nb_components; i++) { |
| c = &desc->comp[i]; |
| /* for now, only 8-16 bits formats */ |
| if (c->depth < 8 || c->depth > 16) |
| return AVERROR(ENOSYS); |
| if (desc->flags & AV_PIX_FMT_FLAG_BE) |
| return AVERROR(ENOSYS); |
| if (c->plane >= MAX_PLANES) |
| return AVERROR(ENOSYS); |
| /* strange interleaving */ |
| if (pixelstep[c->plane] != 0 && |
| pixelstep[c->plane] != c->step) |
| return AVERROR(ENOSYS); |
| if (pixelstep[c->plane] == 6 && |
| c->depth == 16) |
| return AVERROR(ENOSYS); |
| pixelstep[c->plane] = c->step; |
| if (pixelstep[c->plane] >= 8) |
| return AVERROR(ENOSYS); |
| nb_planes = FFMAX(nb_planes, c->plane + 1); |
| } |
| memset(draw, 0, sizeof(*draw)); |
| draw->desc = desc; |
| draw->format = format; |
| draw->nb_planes = nb_planes; |
| draw->flags = flags; |
| draw->full_range = full_range; |
| memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep)); |
| draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w; |
| draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h; |
| for (i = 0; i < (desc->nb_components - !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(flags & FF_DRAW_PROCESS_ALPHA))); i++) |
| draw->comp_mask[desc->comp[i].plane] |= |
| 1 << desc->comp[i].offset; |
| return 0; |
| } |
| |
| void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]) |
| { |
| unsigned i; |
| uint8_t rgba_map[4]; |
| |
| if (rgba != color->rgba) |
| memcpy(color->rgba, rgba, sizeof(color->rgba)); |
| if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) && |
| ff_fill_rgba_map(rgba_map, draw->format) >= 0) { |
| if (draw->nb_planes == 1) { |
| for (i = 0; i < 4; i++) { |
| color->comp[0].u8[rgba_map[i]] = rgba[i]; |
| if (draw->desc->comp[rgba_map[i]].depth > 8) { |
| color->comp[0].u16[rgba_map[i]] = color->comp[0].u8[rgba_map[i]] << 8; |
| } |
| } |
| } else { |
| for (i = 0; i < 4; i++) { |
| color->comp[rgba_map[i]].u8[0] = rgba[i]; |
| if (draw->desc->comp[rgba_map[i]].depth > 8) |
| color->comp[rgba_map[i]].u16[0] = color->comp[rgba_map[i]].u8[0] << (draw->desc->comp[rgba_map[i]].depth - 8); |
| } |
| } |
| } else if (draw->nb_planes >= 2) { |
| /* assume YUV */ |
| const AVPixFmtDescriptor *desc = draw->desc; |
| 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]); |
| 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); |
| 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); |
| color->comp[3].u8[0] = rgba[3]; |
| #define EXPAND(compn) \ |
| if (desc->comp[compn].depth > 8) \ |
| color->comp[desc->comp[compn].plane].u16[desc->comp[compn].offset] = \ |
| color->comp[desc->comp[compn].plane].u8[desc->comp[compn].offset] << \ |
| (draw->desc->comp[compn].depth + draw->desc->comp[compn].shift - 8) |
| EXPAND(3); |
| EXPAND(2); |
| EXPAND(1); |
| EXPAND(0); |
| } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A || |
| draw->format == AV_PIX_FMT_GRAY16LE || draw->format == AV_PIX_FMT_YA16LE || |
| draw->format == AV_PIX_FMT_GRAY9LE || |
| draw->format == AV_PIX_FMT_GRAY10LE || |
| draw->format == AV_PIX_FMT_GRAY12LE || |
| draw->format == AV_PIX_FMT_GRAY14LE) { |
| const AVPixFmtDescriptor *desc = draw->desc; |
| color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); |
| EXPAND(0); |
| color->comp[1].u8[0] = rgba[3]; |
| EXPAND(1); |
| } else { |
| av_log(NULL, AV_LOG_WARNING, |
| "Color conversion not implemented for %s\n", draw->desc->name); |
| memset(color, 128, sizeof(*color)); |
| } |
| } |
| |
| static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[], |
| int plane, int x, int y) |
| { |
| return data[plane] + |
| (y >> draw->vsub[plane]) * linesize[plane] + |
| (x >> draw->hsub[plane]) * draw->pixelstep[plane]; |
| } |
| |
| 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) |
| { |
| int plane, y, wp, hp; |
| uint8_t *p, *q; |
| |
| for (plane = 0; plane < draw->nb_planes; plane++) { |
| p = pointer_at(draw, src, src_linesize, plane, src_x, src_y); |
| q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y); |
| wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane]; |
| hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]); |
| for (y = 0; y < hp; y++) { |
| memcpy(q, p, wp); |
| p += src_linesize[plane]; |
| q += dst_linesize[plane]; |
| } |
| } |
| } |
| |
| void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, |
| uint8_t *dst[], int dst_linesize[], |
| int dst_x, int dst_y, int w, int h) |
| { |
| int plane, x, y, wp, hp; |
| uint8_t *p0, *p; |
| FFDrawColor color_tmp = *color; |
| |
| for (plane = 0; plane < draw->nb_planes; plane++) { |
| p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y); |
| wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]); |
| hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]); |
| if (!hp) |
| return; |
| p = p0; |
| |
| if (HAVE_BIGENDIAN && draw->desc->comp[0].depth > 8) { |
| for (x = 0; 2*x < draw->pixelstep[plane]; x++) |
| color_tmp.comp[plane].u16[x] = av_bswap16(color_tmp.comp[plane].u16[x]); |
| } |
| |
| /* copy first line from color */ |
| for (x = 0; x < wp; x++) { |
| memcpy(p, color_tmp.comp[plane].u8, draw->pixelstep[plane]); |
| p += draw->pixelstep[plane]; |
| } |
| wp *= draw->pixelstep[plane]; |
| /* copy next lines from first line */ |
| p = p0 + dst_linesize[plane]; |
| for (y = 1; y < hp; y++) { |
| memcpy(p, p0, wp); |
| p += dst_linesize[plane]; |
| } |
| } |
| } |
| |
| /** |
| * Clip interval [x; x+w[ within [0; wmax[. |
| * The resulting w may be negative if the final interval is empty. |
| * dx, if not null, return the difference between in and out value of x. |
| */ |
| static void clip_interval(int wmax, int *x, int *w, int *dx) |
| { |
| if (dx) |
| *dx = 0; |
| if (*x < 0) { |
| if (dx) |
| *dx = -*x; |
| *w += *x; |
| *x = 0; |
| } |
| if (*x + *w > wmax) |
| *w = wmax - *x; |
| } |
| |
| /** |
| * Decompose w pixels starting at x |
| * into start + (w starting at x) + end |
| * with x and w aligned on multiples of 1<<sub. |
| */ |
| static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end) |
| { |
| int mask = (1 << sub) - 1; |
| |
| *start = (-*x) & mask; |
| *x += *start; |
| *start = FFMIN(*start, *w); |
| *w -= *start; |
| *end = *w & mask; |
| *w >>= sub; |
| } |
| |
| static int component_used(FFDrawContext *draw, int plane, int comp) |
| { |
| return (draw->comp_mask[plane] >> comp) & 1; |
| } |
| |
| /* If alpha is in the [ 0 ; 0x1010101 ] range, |
| then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range, |
| and >> 24 gives a correct rounding. */ |
| static void blend_line(uint8_t *dst, unsigned src, unsigned alpha, |
| int dx, int w, unsigned hsub, int left, int right) |
| { |
| unsigned asrc = alpha * src; |
| unsigned tau = 0x1010101 - alpha; |
| int x; |
| |
| if (left) { |
| unsigned suba = (left * alpha) >> hsub; |
| *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24; |
| dst += dx; |
| } |
| for (x = 0; x < w; x++) { |
| *dst = (*dst * tau + asrc) >> 24; |
| dst += dx; |
| } |
| if (right) { |
| unsigned suba = (right * alpha) >> hsub; |
| *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24; |
| } |
| } |
| |
| static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha, |
| int dx, int w, unsigned hsub, int left, int right) |
| { |
| unsigned asrc = alpha * src; |
| unsigned tau = 0x10001 - alpha; |
| int x; |
| |
| if (left) { |
| unsigned suba = (left * alpha) >> hsub; |
| uint16_t value = AV_RL16(dst); |
| AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16); |
| dst += dx; |
| } |
| for (x = 0; x < w; x++) { |
| uint16_t value = AV_RL16(dst); |
| AV_WL16(dst, (value * tau + asrc) >> 16); |
| dst += dx; |
| } |
| if (right) { |
| unsigned suba = (right * alpha) >> hsub; |
| uint16_t value = AV_RL16(dst); |
| AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16); |
| } |
| } |
| |
| 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) |
| { |
| unsigned alpha, nb_planes, nb_comp, plane, comp; |
| int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y; |
| uint8_t *p0, *p; |
| |
| /* TODO optimize if alpha = 0xFF */ |
| clip_interval(dst_w, &x0, &w, NULL); |
| clip_interval(dst_h, &y0, &h, NULL); |
| if (w <= 0 || h <= 0 || !color->rgba[3]) |
| return; |
| if (draw->desc->comp[0].depth <= 8) { |
| /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */ |
| alpha = 0x10203 * color->rgba[3] + 0x2; |
| } else { |
| /* 0x101 * alpha is in the [ 2 ; 0x1001] range */ |
| alpha = 0x101 * color->rgba[3] + 0x2; |
| } |
| nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA)); |
| nb_planes += !nb_planes; |
| for (plane = 0; plane < nb_planes; plane++) { |
| nb_comp = draw->pixelstep[plane]; |
| p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0); |
| w_sub = w; |
| h_sub = h; |
| x_sub = x0; |
| y_sub = y0; |
| subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right); |
| subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom); |
| for (comp = 0; comp < nb_comp; comp++) { |
| const int depth = draw->desc->comp[comp].depth; |
| |
| if (!component_used(draw, plane, comp)) |
| continue; |
| p = p0 + comp; |
| if (top) { |
| if (depth <= 8) { |
| blend_line(p, color->comp[plane].u8[comp], alpha >> 1, |
| draw->pixelstep[plane], w_sub, |
| draw->hsub[plane], left, right); |
| } else { |
| blend_line16(p, color->comp[plane].u16[comp], alpha >> 1, |
| draw->pixelstep[plane], w_sub, |
| draw->hsub[plane], left, right); |
| } |
| p += dst_linesize[plane]; |
| } |
| if (depth <= 8) { |
| for (y = 0; y < h_sub; y++) { |
| blend_line(p, color->comp[plane].u8[comp], alpha, |
| draw->pixelstep[plane], w_sub, |
| draw->hsub[plane], left, right); |
| p += dst_linesize[plane]; |
| } |
| } else { |
| for (y = 0; y < h_sub; y++) { |
| blend_line16(p, color->comp[plane].u16[comp], alpha, |
| draw->pixelstep[plane], w_sub, |
| draw->hsub[plane], left, right); |
| p += dst_linesize[plane]; |
| } |
| } |
| if (bottom) { |
| if (depth <= 8) { |
| blend_line(p, color->comp[plane].u8[comp], alpha >> 1, |
| draw->pixelstep[plane], w_sub, |
| draw->hsub[plane], left, right); |
| } else { |
| blend_line16(p, color->comp[plane].u16[comp], alpha >> 1, |
| draw->pixelstep[plane], w_sub, |
| draw->hsub[plane], left, right); |
| } |
| } |
| } |
| } |
| } |
| |
| 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) |
| { |
| unsigned xm, x, y, t = 0; |
| unsigned xmshf = 3 - l2depth; |
| unsigned xmmod = 7 >> l2depth; |
| unsigned mbits = (1 << (1 << l2depth)) - 1; |
| unsigned mmult = 255 / mbits; |
| uint16_t value = AV_RL16(dst); |
| |
| for (y = 0; y < h; y++) { |
| xm = xm0; |
| for (x = 0; x < w; x++) { |
| t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits) |
| * mmult; |
| xm++; |
| } |
| mask += mask_linesize; |
| } |
| alpha = (t >> shift) * alpha; |
| AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16); |
| } |
| |
| 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) |
| { |
| unsigned xm, x, y, t = 0; |
| unsigned xmshf = 3 - l2depth; |
| unsigned xmmod = 7 >> l2depth; |
| unsigned mbits = (1 << (1 << l2depth)) - 1; |
| unsigned mmult = 255 / mbits; |
| |
| for (y = 0; y < h; y++) { |
| xm = xm0; |
| for (x = 0; x < w; x++) { |
| t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits) |
| * mmult; |
| xm++; |
| } |
| mask += mask_linesize; |
| } |
| alpha = (t >> shift) * alpha; |
| *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24; |
| } |
| |
| 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) |
| { |
| int x; |
| |
| if (left) { |
| blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth, |
| left, hband, hsub + vsub, xm); |
| dst += dst_delta; |
| xm += left; |
| } |
| for (x = 0; x < w; x++) { |
| blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth, |
| 1 << hsub, hband, hsub + vsub, xm); |
| dst += dst_delta; |
| xm += 1 << hsub; |
| } |
| if (right) |
| blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth, |
| right, hband, hsub + vsub, xm); |
| } |
| |
| 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) |
| { |
| int x; |
| |
| if (left) { |
| blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, |
| left, hband, hsub + vsub, xm); |
| dst += dst_delta; |
| xm += left; |
| } |
| for (x = 0; x < w; x++) { |
| blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, |
| 1 << hsub, hband, hsub + vsub, xm); |
| dst += dst_delta; |
| xm += 1 << hsub; |
| } |
| if (right) |
| blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, |
| right, hband, hsub + vsub, xm); |
| } |
| |
| 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) |
| { |
| unsigned alpha, nb_planes, nb_comp, plane, comp; |
| int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y; |
| uint8_t *p0, *p; |
| const uint8_t *m; |
| |
| clip_interval(dst_w, &x0, &mask_w, &xm0); |
| clip_interval(dst_h, &y0, &mask_h, &ym0); |
| mask += ym0 * mask_linesize; |
| if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3]) |
| return; |
| if (draw->desc->comp[0].depth <= 8) { |
| /* alpha is in the [ 0 ; 0x10203 ] range, |
| alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */ |
| alpha = (0x10307 * color->rgba[3] + 0x3) >> 8; |
| } else { |
| alpha = (0x101 * color->rgba[3] + 0x2) >> 8; |
| } |
| nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA)); |
| nb_planes += !nb_planes; |
| for (plane = 0; plane < nb_planes; plane++) { |
| nb_comp = draw->pixelstep[plane]; |
| p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0); |
| w_sub = mask_w; |
| h_sub = mask_h; |
| x_sub = x0; |
| y_sub = y0; |
| subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right); |
| subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom); |
| for (comp = 0; comp < nb_comp; comp++) { |
| const int depth = draw->desc->comp[comp].depth; |
| |
| if (!component_used(draw, plane, comp)) |
| continue; |
| p = p0 + comp; |
| m = mask; |
| if (top) { |
| if (depth <= 8) { |
| blend_line_hv(p, draw->pixelstep[plane], |
| color->comp[plane].u8[comp], alpha, |
| m, mask_linesize, l2depth, w_sub, |
| draw->hsub[plane], draw->vsub[plane], |
| xm0, left, right, top); |
| } else { |
| blend_line_hv16(p, draw->pixelstep[plane], |
| color->comp[plane].u16[comp], alpha, |
| m, mask_linesize, l2depth, w_sub, |
| draw->hsub[plane], draw->vsub[plane], |
| xm0, left, right, top); |
| } |
| p += dst_linesize[plane]; |
| m += top * mask_linesize; |
| } |
| if (depth <= 8) { |
| for (y = 0; y < h_sub; y++) { |
| blend_line_hv(p, draw->pixelstep[plane], |
| color->comp[plane].u8[comp], alpha, |
| m, mask_linesize, l2depth, w_sub, |
| draw->hsub[plane], draw->vsub[plane], |
| xm0, left, right, 1 << draw->vsub[plane]); |
| p += dst_linesize[plane]; |
| m += mask_linesize << draw->vsub[plane]; |
| } |
| } else { |
| for (y = 0; y < h_sub; y++) { |
| blend_line_hv16(p, draw->pixelstep[plane], |
| color->comp[plane].u16[comp], alpha, |
| m, mask_linesize, l2depth, w_sub, |
| draw->hsub[plane], draw->vsub[plane], |
| xm0, left, right, 1 << draw->vsub[plane]); |
| p += dst_linesize[plane]; |
| m += mask_linesize << draw->vsub[plane]; |
| } |
| } |
| if (bottom) { |
| if (depth <= 8) { |
| blend_line_hv(p, draw->pixelstep[plane], |
| color->comp[plane].u8[comp], alpha, |
| m, mask_linesize, l2depth, w_sub, |
| draw->hsub[plane], draw->vsub[plane], |
| xm0, left, right, bottom); |
| } else { |
| blend_line_hv16(p, draw->pixelstep[plane], |
| color->comp[plane].u16[comp], alpha, |
| m, mask_linesize, l2depth, w_sub, |
| draw->hsub[plane], draw->vsub[plane], |
| xm0, left, right, bottom); |
| } |
| } |
| } |
| } |
| } |
| |
| int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, |
| int value) |
| { |
| unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max; |
| |
| if (!shift) |
| return value; |
| if (round_dir >= 0) |
| value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1); |
| return (value >> shift) << shift; |
| } |
| |
| AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags) |
| { |
| enum AVPixelFormat i; |
| FFDrawContext draw; |
| AVFilterFormats *fmts = NULL; |
| int ret; |
| |
| for (i = 0; av_pix_fmt_desc_get(i); i++) |
| if (ff_draw_init(&draw, i, flags) >= 0 && |
| (ret = ff_add_format(&fmts, i)) < 0) |
| return NULL; |
| return fmts; |
| } |
