1/*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#include "libavutil/avutil.h"
20#include "libavutil/colorspace.h"
21#include "libavutil/pixdesc.h"
22#include "drawutils.h"
23
24enum { RED = 0, GREEN, BLUE, ALPHA };
25
26int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
27                            enum PixelFormat pix_fmt, uint8_t rgba_color[4],
28                            int *is_packed_rgba, uint8_t rgba_map_ptr[4])
29{
30    uint8_t rgba_map[4] = {0};
31    int i;
32    const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
33    int hsub = pix_desc->log2_chroma_w;
34
35    *is_packed_rgba = 1;
36    switch (pix_fmt) {
37    case PIX_FMT_ARGB:  rgba_map[ALPHA] = 0; rgba_map[RED  ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
38    case PIX_FMT_ABGR:  rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED  ] = 3; break;
39    case PIX_FMT_RGBA:
40    case PIX_FMT_RGB24: rgba_map[RED  ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
41    case PIX_FMT_BGRA:
42    case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED  ] = 2; rgba_map[ALPHA] = 3; break;
43    default:
44        *is_packed_rgba = 0;
45    }
46
47    if (*is_packed_rgba) {
48        pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
49        for (i = 0; i < 4; i++)
50            dst_color[rgba_map[i]] = rgba_color[i];
51
52        line[0] = av_malloc(w * pixel_step[0]);
53        for (i = 0; i < w; i++)
54            memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
55        if (rgba_map_ptr)
56            memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
57    } else {
58        int plane;
59
60        dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
61        dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
62        dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
63        dst_color[3] = rgba_color[3];
64
65        for (plane = 0; plane < 4; plane++) {
66            int line_size;
67            int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
68
69            pixel_step[plane] = 1;
70            line_size = (w >> hsub1) * pixel_step[plane];
71            line[plane] = av_malloc(line_size);
72            memset(line[plane], dst_color[plane], line_size);
73        }
74    }
75
76    return 0;
77}
78
79void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
80                       uint8_t *src[4], int pixelstep[4],
81                       int hsub, int vsub, int x, int y, int w, int h)
82{
83    int i, plane;
84    uint8_t *p;
85
86    for (plane = 0; plane < 4 && dst[plane]; plane++) {
87        int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
88        int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
89
90        p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
91        for (i = 0; i < (h >> vsub1); i++) {
92            memcpy(p + (x >> hsub1) * pixelstep[plane],
93                   src[plane], (w >> hsub1) * pixelstep[plane]);
94            p += dst_linesize[plane];
95        }
96    }
97}
98
99void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
100                       uint8_t *src[4], int src_linesize[4], int pixelstep[4],
101                       int hsub, int vsub, int x, int y, int y2, int w, int h)
102{
103    int i, plane;
104    uint8_t *p;
105
106    for (plane = 0; plane < 4 && dst[plane]; plane++) {
107        int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
108        int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
109
110        p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
111        for (i = 0; i < (h >> vsub1); i++) {
112            memcpy(p + (x >> hsub1) * pixelstep[plane],
113                   src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), (w >> hsub1) * pixelstep[plane]);
114            p += dst_linesize[plane];
115        }
116    }
117}
118