2 * drawtext.c: print text over the screen
3 ******************************************************************
5 * -f <filename> font filename
6 * -s <pixel_size> font size in pixels
8 * -o outline glyphs (use the bg color)
9 * -x <pos> x position ( > 0)
10 * -y <pos> y position ( > 0)
11 * -t <text> text to print (will be passed to strftime())
12 * -c <#RRGGBB> foreground color ('internet' way)
13 * -C <#RRGGBB> background color ('internet' way)
15 ******************************************************************
17 * Author: Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br>
19 * This library is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU Lesser General Public
21 * License as published by the Free Software Foundation; either
22 * version 2 of the License, or (at your option) any later version.
24 * This library is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * Lesser General Public License for more details.
29 * You should have received a copy of the GNU Lesser General Public
30 * License along with this library; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
42 #include "framehook.h"
45 #include FT_FREETYPE_H
47 #define RGB_TO_YUV(rgb_color, yuv_color) { \
48 yuv_color[0] = ( 0.257 * rgb_color[0]) + (0.504 * rgb_color[1]) + (0.098 * rgb_color[2]) + 16; \
49 yuv_color[2] = ( 0.439 * rgb_color[0]) - (0.368 * rgb_color[1]) - (0.071 * rgb_color[2]) + 128; \
50 yuv_color[1] = (-0.148 * rgb_color[0]) - (0.291 * rgb_color[1]) + (0.439 * rgb_color[2]) + 128; \
53 #define COPY_3(dst,src) { \
61 #define SET_PIXEL(picture, yuv_color, x, y) { \
62 picture->data[0][ (x) + (y)*picture->linesize[0] ] = yuv_color[0]; \
63 picture->data[1][ ((x/2) + (y/2)*picture->linesize[1]) ] = yuv_color[1]; \
64 picture->data[2][ ((x/2) + (y/2)*picture->linesize[2]) ] = yuv_color[2]; \
67 #define GET_PIXEL(picture, yuv_color, x, y) { \
68 yuv_color[0] = picture->data[0][ (x) + (y)*picture->linesize[0] ]; \
69 yuv_color[1] = picture->data[1][ (x/2) + (y/2)*picture->linesize[1] ]; \
70 yuv_color[2] = picture->data[2][ (x/2) + (y/2)*picture->linesize[2] ]; \
80 unsigned char bgcolor[3]; /* YUV */
81 unsigned char fgcolor[3]; /* YUV */
87 void Release(void *ctx)
94 int ParseColor(char *text, unsigned char yuv_color[3])
97 unsigned char rgb_color[3];
102 if ((!text) || (strlen(text) != 7) || (text[0] != '#') )
105 for (i=0; i < 3; i++)
107 tmp[0] = text[i*2+1];
108 tmp[1] = text[i*2+2];
110 rgb_color[i] = strtol(tmp, NULL, 16);
113 RGB_TO_YUV(rgb_color, yuv_color);
115 printf("RGB=%d,%d,%d YUV=%d,%d,%d\n",rgb_color[0],rgb_color[1],rgb_color[2],
116 yuv_color[0],yuv_color[1],yuv_color[2]);
120 int Configure(void **ctxp, int argc, char *argv[])
124 ContextInfo *ci=NULL;
126 unsigned int size=16;
128 *ctxp = av_mallocz(sizeof(ContextInfo));
129 ci = (ContextInfo *) *ctxp;
131 /* configure Context Info */
144 while ((c = getopt(argc, argv, "f:t:x:y:s:c:C:bo")) > 0) {
150 ci->text = av_strdup(optarg);
153 ci->x = (unsigned int) atoi(optarg);
156 ci->y = (unsigned int) atoi(optarg);
159 size = (unsigned int) atoi(optarg);
162 if (ParseColor(optarg, ci->fgcolor) == -1)
164 fprintf(stderr, "ERROR: Invalid foreground color: '%s'. You must specify the color in the internet way(packaged hex): #RRGGBB, ie: -c #ffffff (for white foreground)\n",optarg);
169 if (ParseColor(optarg, ci->bgcolor) == -1)
171 fprintf(stderr, "ERROR: Invalid foreground color: '%s'. You must specify the color in the internet way(packaged hex): #RRGGBB, ie: -c #ffffff (for white foreground)\n",optarg);
182 fprintf(stderr, "ERROR: Unrecognized argument '%s'\n", argv[optind]);
189 fprintf(stderr,"ERROR: No text provided (-t text)\n");
195 fprintf(stderr,"ERROR: No font file provided! (-f filename)\n");
199 if ((error = FT_Init_FreeType(&(ci->ft_lib))) != 0)
201 fprintf(stderr,"ERROR: Could not load FreeType (error# %d)\n",error);
205 if ((error = FT_New_Face( ci->ft_lib, font, 0, &(ci->ft_face) )) != 0)
207 fprintf(stderr,"ERROR: Could not load face: %s (error# %d)\n",font, error);
211 if ((error = FT_Set_Pixel_Sizes( ci->ft_face, 0, size)) != 0)
213 fprintf(stderr,"ERROR: Could not set font size to %d pixels (error# %d)\n",size, error);
221 inline void draw_glyph(AVPicture *picture, FT_Bitmap *bitmap, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_fgcolor[3], unsigned char yuv_bgcolor[3], int outline)
224 int spixel, dpixel[3], in_glyph=0;
226 if (bitmap->pixel_mode == ft_pixel_mode_mono)
229 for (r=0; (r < bitmap->rows) && (r+y < height); r++)
231 for (c=0; (c < bitmap->width) && (c+x < width); c++)
233 /* pixel in the picture (destination) */
234 GET_PIXEL(picture, dpixel, (c+x), (y+r));
236 /* pixel in the glyph bitmap (source) */
237 spixel = bitmap->buffer[r*bitmap->pitch +c/8] & (0x80>>(c%8));
240 COPY_3(dpixel, yuv_fgcolor);
244 /* border detection: */
245 if ( (!in_glyph) && (spixel) )
246 /* left border detected */
249 /* draw left pixel border */
251 SET_PIXEL(picture, yuv_bgcolor, (c+x-1), (y+r));
253 else if ( (in_glyph) && (!spixel) )
254 /* right border detected */
257 /* 'draw' right pixel border */
258 COPY_3(dpixel, yuv_bgcolor);
261 /* see if we have a top/bottom border */
264 if ( (r-1 >= 0) && (! bitmap->buffer[(r-1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
265 /* we have a top border */
266 SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r-1));
269 if ( (r+1 < height) && (! bitmap->buffer[(r+1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
270 /* we have a bottom border */
271 SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r+1));
276 SET_PIXEL(picture, dpixel, (c+x), (y+r));
283 void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, INT64 pts)
285 ContextInfo *ci = (ContextInfo *) ctx;
286 FT_Face face = ci->ft_face;
287 FT_GlyphSlot slot = face->glyph;
288 char *text = ci->text;
289 int x = 0, y = 0, i=0, j=0, size=0, error;
292 time_t now = time(0);
294 strftime(buff, sizeof(buff), text, localtime(&now));
304 /* measure string size */
306 for (i=0; i < size; i++)
308 /* load glyph image into the slot (erase previous one) */
309 error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
310 if (error) continue; /* ignore errors */
312 str_w += slot->advance.x >> 6;
314 if (slot->bitmap_top > str_h)
315 str_h = slot->bitmap_top;
321 /* draw background */
322 for (j = 0; (j < str_h) && (j+y < height); j++)
323 for (i = 0; (i < str_w) && (i+x < width); i++)
325 SET_PIXEL(picture, ci->bgcolor, (i+x), (y+j));
329 for (i=0; i < size; i++)
331 /* load glyph image into the slot (erase previous one) */
332 error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
333 if (error) continue; /* ignore errors */
335 if (text[i] != '_') /* skip '_' (consider as space) */
336 /* now, draw to our target surface */
338 draw_glyph( picture, &slot->bitmap,
339 x + slot->bitmap_left,
340 y - slot->bitmap_top + str_h,
342 ci->fgcolor, ci->bgcolor,
345 /* increment pen position */
346 x += slot->advance.x >> 6;