/*
* drawtext.c: print text over the screen
- ******************************************************************
+ ******************************************************************************
* Options:
- * -f <filename> font filename
- * -s <pixel_size> font size in pixels
+ * -f <filename> font filename (MANDATORY!!!)
+ * -s <pixel_size> font size in pixels [default 16]
* -b print background
* -o outline glyphs (use the bg color)
- * -x <pos> x position ( > 0)
- * -y <pos> y position ( > 0)
+ * -x <pos> x position ( >= 0) [default 0]
+ * -y <pos> y position ( >= 0) [default 0]
* -t <text> text to print (will be passed to strftime())
- * -c <#RRGGBB> foreground color ('internet' way)
- * -C <#RRGGBB> background color ('internet' way)
- *
- ******************************************************************
+ * MANDATORY: will be used even when -T is used.
+ * in this case, -t will be used if some error
+ * occurs
+ * -T <filename> file with the text (re-read every frame)
+ * -c <#RRGGBB> foreground color ('internet' way) [default #ffffff]
+ * -C <#RRGGBB> background color ('internet' way) [default #000000]
*
+ ******************************************************************************
+ * Features:
+ * - True Type, Type1 and others via FreeType2 library
+ * - Font kerning (better output)
+ * - Line Wrap (if the text doesn't fit, the next char go to the next line)
+ * - Background box
+ * - Outline
+ ******************************************************************************
* Author: Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br>
*
* This library is free software; you can redistribute it and/or
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+
+#define MAXSIZE_TEXT 1024
+
+#include "framehook.h"
+
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
+#undef time
#include <sys/time.h>
#include <time.h>
-#include "framehook.h"
-
#include <ft2build.h>
#include FT_FREETYPE_H
+#include FT_GLYPH_H
#define RGB_TO_YUV(rgb_color, yuv_color) { \
yuv_color[0] = ( 0.257 * rgb_color[0]) + (0.504 * rgb_color[1]) + (0.098 * rgb_color[2]) + 16; \
typedef struct {
- char *text;
+ unsigned char *text;
+ unsigned char *file;
unsigned int x;
unsigned int y;
int bg;
int outline;
unsigned char bgcolor[3]; /* YUV */
unsigned char fgcolor[3]; /* YUV */
- FT_Library ft_lib;
- FT_Face ft_face;
+ FT_Library library;
+ FT_Face face;
+ FT_Glyph glyphs[ 255 ];
+ FT_Bitmap bitmaps[ 255 ];
+ int advance[ 255 ];
+ int bitmap_left[ 255 ];
+ int bitmap_top[ 255 ];
+ unsigned int glyphs_index[ 255 ];
+ int text_height;
+ int baseline;
+ int use_kerning;
} ContextInfo;
RGB_TO_YUV(rgb_color, yuv_color);
- printf("RGB=%d,%d,%d YUV=%d,%d,%d\n",rgb_color[0],rgb_color[1],rgb_color[2],
- yuv_color[0],yuv_color[1],yuv_color[2]);
return 0;
}
ContextInfo *ci=NULL;
char *font=NULL;
unsigned int size=16;
-
+ FT_BBox bbox;
+ int yMax, yMin;
*ctxp = av_mallocz(sizeof(ContextInfo));
ci = (ContextInfo *) *ctxp;
/* configure Context Info */
ci->text = NULL;
+ ci->file = NULL;
ci->x = ci->y = 0;
ci->fgcolor[0]=255;
ci->fgcolor[1]=128;
ci->fgcolor[2]=128;
ci->bg = 0;
ci->outline = 0;
+ ci->text_height = 0;
optind = 0;
- while ((c = getopt(argc, argv, "f:t:x:y:s:c:C:bo")) > 0) {
+ while ((c = getopt(argc, argv, "f:t:T:x:y:s:c:C:bo")) > 0) {
switch (c) {
case 'f':
font = optarg;
case 't':
ci->text = av_strdup(optarg);
break;
+ case 'T':
+ ci->file = av_strdup(optarg);
+ break;
case 'x':
ci->x = (unsigned int) atoi(optarg);
break;
return -1;
}
+ if (ci->file)
+ {
+ FILE *fp;
+ if ((fp=fopen(ci->file, "r")) == NULL)
+ {
+ perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
+ }
+ else
+ {
+ fclose(fp);
+ }
+ }
+
if (!font)
{
fprintf(stderr,"ERROR: No font file provided! (-f filename)\n");
return -1;
}
- if ((error = FT_Init_FreeType(&(ci->ft_lib))) != 0)
+ if ((error = FT_Init_FreeType(&(ci->library))) != 0)
{
fprintf(stderr,"ERROR: Could not load FreeType (error# %d)\n",error);
return -1;
}
- if ((error = FT_New_Face( ci->ft_lib, font, 0, &(ci->ft_face) )) != 0)
+ if ((error = FT_New_Face( ci->library, font, 0, &(ci->face) )) != 0)
{
fprintf(stderr,"ERROR: Could not load face: %s (error# %d)\n",font, error);
return -1;
}
- if ((error = FT_Set_Pixel_Sizes( ci->ft_face, 0, size)) != 0)
+ if ((error = FT_Set_Pixel_Sizes( ci->face, 0, size)) != 0)
{
fprintf(stderr,"ERROR: Could not set font size to %d pixels (error# %d)\n",size, error);
return -1;
}
-
+
+ ci->use_kerning = FT_HAS_KERNING(ci->face);
+
+ /* load and cache glyphs */
+ yMax = -32000;
+ yMin = 32000;
+ for (c=0; c < 256; c++)
+ {
+ /* Load char */
+ error = FT_Load_Char( ci->face, (unsigned char) c, FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
+ if (error) continue; /* ignore errors */
+
+ /* Save bitmap */
+ ci->bitmaps[c] = ci->face->glyph->bitmap;
+ /* Save bitmap left */
+ ci->bitmap_left[c] = ci->face->glyph->bitmap_left;
+ /* Save bitmap top */
+ ci->bitmap_top[c] = ci->face->glyph->bitmap_top;
+
+ /* Save advance */
+ ci->advance[c] = ci->face->glyph->advance.x >> 6;
+
+ /* Save glyph */
+ error = FT_Get_Glyph( ci->face->glyph, &(ci->glyphs[c]) );
+ /* Save glyph index */
+ ci->glyphs_index[c] = FT_Get_Char_Index( ci->face, (unsigned char) c );
+
+ /* Measure text height to calculate text_height (or the maximum text height) */
+ FT_Glyph_Get_CBox( ci->glyphs[ c ], ft_glyph_bbox_pixels, &bbox );
+ if (bbox.yMax > yMax)
+ yMax = bbox.yMax;
+ if (bbox.yMin < yMin)
+ yMin = bbox.yMin;
+
+ }
+
+ ci->text_height = yMax - yMin;
+ ci->baseline = yMax;
+
return 0;
}
+
+
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)
{
int r, c;
/* 'draw' right pixel border */
COPY_3(dpixel, yuv_bgcolor);
}
- else if (in_glyph)
+
+ if (in_glyph)
/* see if we have a top/bottom border */
{
/* top */
if ( (r-1 >= 0) && (! bitmap->buffer[(r-1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
/* we have a top border */
SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r-1));
-
+
/* bottom */
if ( (r+1 < height) && (! bitmap->buffer[(r+1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
/* we have a bottom border */
}
-void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, INT64 pts)
+inline void draw_box(AVPicture *picture, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_color[3])
+{
+ int i, j;
+
+ for (j = 0; (j < height); j++)
+ for (i = 0; (i < width); i++)
+ {
+ SET_PIXEL(picture, yuv_color, (i+x), (y+j));
+ }
+
+}
+
+
+
+
+void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
{
ContextInfo *ci = (ContextInfo *) ctx;
- FT_Face face = ci->ft_face;
+ FT_Face face = ci->face;
FT_GlyphSlot slot = face->glyph;
- char *text = ci->text;
- int x = 0, y = 0, i=0, j=0, size=0, error;
- int str_w, str_h;
- char buff[1000];
+ unsigned char *text = ci->text;
+ unsigned char c;
+ int x = 0, y = 0, i=0, size=0;
+ unsigned char buff[MAXSIZE_TEXT];
+ unsigned char tbuff[MAXSIZE_TEXT];
time_t now = time(0);
+ int str_w, str_w_max;
+ FT_Vector pos[MAXSIZE_TEXT];
+ FT_Vector delta;
+
+ if (ci->file)
+ {
+ int fd = open(ci->file, O_RDONLY);
+
+ if (fd < 0)
+ {
+ text = ci->text;
+ perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
+ }
+ else
+ {
+ int l = read(fd, tbuff, sizeof(tbuff) - 1);
+
+ if (l >= 0)
+ {
+ tbuff[l] = 0;
+ text = tbuff;
+ }
+ else
+ {
+ text = ci->text;
+ perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
+ }
+ close(fd);
+ }
+ }
+ else
+ {
+ text = ci->text;
+ }
strftime(buff, sizeof(buff), text, localtime(&now));
size = strlen(text);
- x = ci->x;
- y = ci->y;
- /* measure string size */
- str_w = str_h = 0;
+
+ /* measure string size and save glyphs position*/
+ str_w = str_w_max = 0;
+ x = ci->x;
+ y = ci->y;
for (i=0; i < size; i++)
{
- /* load glyph image into the slot (erase previous one) */
- error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
- if (error) continue; /* ignore errors */
+ c = text[i];
- str_w += slot->advance.x >> 6;
-
- if (slot->bitmap_top > str_h)
- str_h = slot->bitmap_top;
+ /* kerning */
+ if ( (ci->use_kerning) && (i > 0) && (ci->glyphs_index[c]) )
+ {
+ FT_Get_Kerning( ci->face,
+ ci->glyphs_index[ text[i-1] ],
+ ci->glyphs_index[c],
+ ft_kerning_default,
+ &delta );
+
+ x += delta.x >> 6;
+ }
+ if (( (x + ci->advance[ c ]) >= width ) || ( c == '\n' ))
+ {
+ str_w = width - ci->x - 1;
+
+ y += ci->text_height;
+ x = ci->x;
+ }
+
+
+ /* save position */
+ pos[i].x = x + ci->bitmap_left[c];
+ pos[i].y = y - ci->bitmap_top[c] + ci->baseline;
+
+
+ x += ci->advance[c];
+
+
+ if (str_w > str_w_max)
+ str_w_max = str_w;
+
+ }
+
+
+
+
+ if (ci->bg)
+ {
+ /* Check if it doesn't pass the limits */
+ if ( str_w_max + ci->x >= width )
+ str_w_max = width - ci->x - 1;
+ if ( y >= height )
+ y = height - 1 - 2*ci->y;
+
+ /* Draw Background */
+ draw_box( picture, ci->x, ci->y, str_w_max, y - ci->y, ci->bgcolor );
}
- if (ci->bg)
- /* draw background */
- for (j = 0; (j < str_h) && (j+y < height); j++)
- for (i = 0; (i < str_w) && (i+x < width); i++)
- {
- SET_PIXEL(picture, ci->bgcolor, (i+x), (y+j));
- }
/* Draw Glyphs */
for (i=0; i < size; i++)
{
- /* load glyph image into the slot (erase previous one) */
- error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
- if (error) continue; /* ignore errors */
-
- if (text[i] != '_') /* skip '_' (consider as space) */
+ c = text[i];
+
+ if (
+ ( (c == '_') && (text == ci->text) ) || /* skip '_' (consider as space)
+ IF text was specified in cmd line
+ (which doesn't like neasted quotes) */
+ ( c == '\n' ) /* Skip new line char, just go to new line */
+ )
+ continue;
+
/* now, draw to our target surface */
-
- draw_glyph( picture, &slot->bitmap,
- x + slot->bitmap_left,
- y - slot->bitmap_top + str_h,
- width, height,
- ci->fgcolor, ci->bgcolor,
- ci->outline);
+ draw_glyph( picture,
+ &(ci->bitmaps[ c ]),
+ pos[i].x,
+ pos[i].y,
+ width,
+ height,
+ ci->fgcolor,
+ ci->bgcolor,
+ ci->outline );
/* increment pen position */
x += slot->advance.x >> 6;
projects / ffmpeg / blobdiff