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