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veejay/veejay-26nov04/plugins/drawtext.c
Niels Elburg 8993ffdb73 Initial revision 
git-svn-id: svn://code.dyne.org/veejay/trunk@27 eb8d1916-c9e9-0310-b8de-cf0c9472ead5
2004-10-27 23:48:49 +00:00

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/*
* drawtext.c: print text over the screen
******************************************************************************
* Options:
* -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) [default 0]
* -y <pos> y position ( >= 0) [default 0]
* -t <text> text to print (will be passed to strftime())
* 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>
* Niels Elburg <nelburg@looze.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <dirent.h>
#include <time.h>
#ifdef HAVE_FREETYPE
#include <fcntl.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include <veejay-plugin.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; \
yuv_color[2] = ( 0.439 * rgb_color[0]) - (0.368 * rgb_color[1]) - (0.071 * rgb_color[2]) + 128; \
yuv_color[1] = (-0.148 * rgb_color[0]) - (0.291 * rgb_color[1]) + (0.439 * rgb_color[2]) + 128; \
}
#define DEFAULT_FONT "/usr/X11R6/lib/X11/fonts/TTF/VeraSe.ttf"
#define DEFAULT_FONT_PATH "/usr/X11R6/lib/X11/fonts/TTF/"
typedef struct {
unsigned char *text;
unsigned char *file;
unsigned char *font;
unsigned int x;
unsigned int y;
int bg;
int outline;
uint8_t bgcolor[3]; /* YUV */
uint8_t fgcolor[3]; /* YUV */
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;
int size;
VJPluginInfo *info;
char **font_table;
int font_index;
int rand_font;
} ContextInfo;
#define MAX_FONTS 100
VJPluginInfo *Info(void *ctx)
{
ContextInfo *ec = (ContextInfo*) ctx;
return (VJPluginInfo*) ec->info;
}
int font_selector( const struct dirent *dir )
{
if(strstr(dir->d_name, ".ttf" )) return 1;
if(strstr(dir->d_name, ".TTF" )) return 1;
if(strstr(dir->d_name, ".pfa" )) return 1;
if(strstr(dir->d_name, ".pcf.gz" )) return 1;
return 0;
}
int find_fonts(ContextInfo *ec, char *path)
{
struct dirent **files;
int n = scandir(path, &files, font_selector,alphasort);
if(n < 0)
return 0;
while(n--)
{
char tmp[512];
snprintf(tmp,512,"%s/%s",path,files[n]->d_name);
if(ec->font_index<MAX_FONTS)
{
ec->font_table[ec->font_index] = strdup(tmp);
ec->font_index++;
}
}
return 1;
}
char *select_font( ContextInfo *ec, int id )
{
int i;
for( i = 0; i < ec->font_index; i ++)
{
if(id == i ) return ec->font_table[i];
}
return NULL;
}
void print_fonts(ContextInfo *ec)
{
int i;
for(i =0 ; i < ec->font_index ; i ++ )
{
veejay_msg(VEEJAY_MSG_INFO, "[%3d] : [%s]",
i, ec->font_table[i] );
}
}
int ParseColor(char *text, uint8_t *y , uint8_t *u, uint8_t *v)
{
uint8_t tmp[3];
uint8_t rgb_color[3];
int i;
tmp[2] = '\0';
if ((!text) || (strlen(text) != 7) || (text[0] != '#') )
return -1;
for (i=0; i < 3; i++)
{
tmp[0] = text[i*2+1];
tmp[1] = text[i*2+2];
rgb_color[i] = (uint8_t) atoi( tmp );
}
*y = (uint8_t) ( (float) ( 0.257 * rgb_color[0]) + (0.504 * rgb_color[1]) + (0.098 * rgb_color[2]) + 16);
*u = (uint8_t) ( (float) ( 0.439 * rgb_color[0]) - (0.368 * rgb_color[1]) - (0.071 * rgb_color[2]) + 128);
*v = (uint8_t) ( (float) (-0.148 * rgb_color[0]) - (0.291 * rgb_color[1]) + (0.439 * rgb_color[2]) + 128);
return 0;
}
void Free(void *ctx)
{
if( ctx )
{
ContextInfo *ec = (ContextInfo*) ctx;
if(ec->info)
{
if(ec->info->name) free(ec->info->name);
if(ec->info->help) free(ec->info->help);
free(ec->info);
}
if(ec->text) free(ec->text);
if(ec->font) free(ec->font);
free(ec);
}
}
int configure(void *ctx, int size)
{
int c,error;
// char *font = "/usr/X11R6/lib/X11/fonts/TTF/luxisri.ttf";
FT_BBox bbox;
int yMax,yMin;
int ran = 0;
ContextInfo *ci = (ContextInfo*) ctx;
ci->size = size;
if(ci->rand_font)
{
int ran = 1 + (int) (((double)ci->rand_font * rand())/(RAND_MAX+1.0));
sprintf( ci->font, "%s", select_font(ci, ran ) );
veejay_msg(VEEJAY_MSG_DEBUG,"Random %d font [%s]", ran,ci->font);
}
if(ci->font == NULL )
return 0;
if ( (error = FT_Init_FreeType(&(ci->library))) != 0 )
{
veejay_msg(VEEJAY_MSG_ERROR,"Cannot load FreeType (error #%d) \n",error);
return 0;
}
if ( (error = FT_New_Face( ci->library, ci->font, 0, &(ci->face) )) != 0)
{
veejay_msg(VEEJAY_MSG_ERROR,"Cannot load face: %s (error #%d)\n ", ci->font, error);
return 0;
}
if ( (error = FT_Set_Pixel_Sizes( ci->face, 0, ci->size)) != 0)
{
veejay_msg(VEEJAY_MSG_ERROR, "Cannot set font size to %d pixels (error #%d)\n", ci->size, error );
return 0;
}
ci->use_kerning = FT_HAS_KERNING(ci->face);
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)
{
veejay_msg(VEEJAY_MSG_ERROR,"Cannot load char '%c' \n", (unsigned char)c);
sprintf(ci->font, "%s", DEFAULT_FONT);
return 0;
}
if(error) continue;
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 1;
}
int Init(void **ctxp)
{
ContextInfo *ci = NULL;
*ctxp = malloc(sizeof(ContextInfo));
if( ! *ctxp ) return 0;
ci = (ContextInfo*) *ctxp;
memset(ci, 0, sizeof(ContextInfo));
ci->text = (unsigned char*) malloc(sizeof(unsigned char) * 1024);
ci->font = (unsigned char*) malloc(sizeof(unsigned char) * 1024);
ci->file = NULL;
ci->x = 0;
ci->y = 0;
ci->fgcolor[0] = 255;
ci->fgcolor[1] = 128;
ci->fgcolor[2] = 128;
ci->bgcolor[0] = 16;
ci->bgcolor[1] = 128;
ci->bgcolor[2] = 128;
ci->bg = 0;
ci->outline = 0;
ci->text_height = 0;
ci->info = (VJPluginInfo*)malloc(sizeof(VJPluginInfo)) ;
ci->info->name = strdup("DrawText");
ci->info->help = strdup("Draws a Text on the screen");
ci->info->plugin_type = VJPLUG_NORMAL;
ci->size = 40;
bzero(ci->text, 1024);
bzero(ci->font, 1024);
if( !ci->text )
{
veejay_msg(VEEJAY_MSG_ERROR,"No text provided (-t text)\n");
return -1;
}
if ( ci->file )
{
FILE *fp;
if( (fp=fopen(ci->file, "r")) == NULL )
{
veejay_msg(VEEJAY_MSG_ERROR, "The file could not be opened.\n");
return 0;
}
}
sprintf(ci->font, "%s",DEFAULT_FONT);
ci->font_table = (char**) malloc(sizeof(char*) * MAX_FONTS );
ci->font_index =0;
ci->rand_font = 0;
find_fonts(ci,"/usr/X11R6/lib/fonts/TTF");
find_fonts(ci,"/usr/X11R6/lib/fonts/Type1");
find_fonts(ci,"/usr/X11R6/lib/truetype");
find_fonts(ci,"/usr/X11R6/lib/TrueType");
find_fonts(ci,"/usr/X11R6/lib/75dpi");
find_fonts(ci,"/usr/X11R6/lib/cyrillic");
find_fonts(ci,"~/veejay-fonts");
if(!configure((void*)ci, ci->size))
{
Free(ci);
return 0;
}
print_fonts(ci);
return 1;
}
void draw_glyph(
VJFrameInfo *info,
VJFrame *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;
int spixel, dpixel[3], in_glyph=0;
dpixel[2] = 128; dpixel[1] = 128;
uint8_t *Y = picture->data[0];
uint8_t *U = picture->data[1];
uint8_t *V = picture->data[2];
if (bitmap->pixel_mode == ft_pixel_mode_mono)
{
in_glyph = 0;
for (r=0; (r < bitmap->rows) && (r+y < height); r++)
{
for (c=0; (c < bitmap->width) && (c+x < width); c++)
{
/* pixel in the picture (destination) */
dpixel[0] = Y[ (c+x) + ((y+r)*info->width)];
dpixel[1] = U[ ((c+x)>>picture->shift_h) + (((y+r)>>picture->shift_v) * picture->uv_width)];
dpixel[2] = V[ ((c+x)>>picture->shift_h) + (((y+r)>>picture->shift_v) * picture->uv_width)];
/* pixel in the glyph bitmap (source) */
spixel = bitmap->buffer[r*bitmap->pitch +c/8] & (0x80>>(c%8));
if (spixel)
{
dpixel[0] = yuv_fgcolor[0];
dpixel[1] = yuv_fgcolor[1];
dpixel[2] = yuv_fgcolor[2];
}
if (outline)
{
/* border detection: */
if ( (!in_glyph) && (spixel) )
/* left border detected */
{
in_glyph = 1;
/* draw left pixel border */
if (c-1 >= 0)
{
Y[ (c+x-1) + ((y+r) * info->width )] = yuv_bgcolor[0];
U[ ((c+x-1) >> picture->shift_h) + ((y+r) >> picture->shift_v) * picture->uv_width] = yuv_bgcolor[1];
V[ ((c+x-1) >> picture->shift_h) + ((y+r) >> picture->shift_v) * picture->uv_width] = yuv_bgcolor[2];
}
}
else if ( (in_glyph) && (!spixel) )
/* right border detected */
{
in_glyph = 0;
/* 'draw' right pixel border */
dpixel[0] = yuv_bgcolor[0];
dpixel[1] = yuv_bgcolor[1];
dpixel[2] = yuv_bgcolor[2];
}
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 */
Y[ (c+x) + ((y+r-1) * info->width )] = yuv_bgcolor[0];
U[ ((c+x) >> picture->shift_h) + ((y+r-1) >> picture->shift_v) * picture->uv_width] = yuv_bgcolor[1];
V[ ((c+x) >> picture->shift_h) + ((y+r-1) >> picture->shift_v) * picture->uv_width] = yuv_bgcolor[2];
}
/* bottom */
if ( (r+1 < height) && (! bitmap->buffer[(r+1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
{
/* we have a bottom border */
Y[ (c+x) + ((y+r+1) * info->width )] = yuv_bgcolor[0];
U[ ((c+x) >> picture->shift_h) + ((y+r+1) >> picture->shift_v) * picture->uv_width] = yuv_bgcolor[1];
V[ ((c+x) >> picture->shift_h) + ((y+r+1) >> picture->shift_v) * picture->uv_width] = yuv_bgcolor[2];
}
}
}
Y[ (c+x) + ((y+r) * info->width )] = dpixel[0];
U[ ((c+x) >> picture->shift_h) + ((y+r) >> picture->shift_v) * picture->uv_width] = dpixel[1];
V[ ((c+x) >> picture->shift_h) + ((y+r) >> picture->shift_v) * picture->uv_width] = dpixel[2];
}
}
}
}
inline void draw_box(VJFrameInfo *info, VJFrame *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++)
{
picture->data[0][ (i+x) + ((y+j) * info->width )] = yuv_color[0];
picture->data[1][ ((i+x) >> picture->shift_h) + ((y+j) >> picture->shift_v) * picture->uv_width] = yuv_color[1];
picture->data[2][ ((i+x) >> picture->shift_h) + ((y+j) >> picture->shift_v) * picture->uv_width] = yuv_color[2];
}
}
#define MAXSIZE_TEXT 1024
void Event(void *ctx, const char *tokens)
{
char tmp[1024];
int num = 0;
int post_init = 0;
int str = 0;
ContextInfo *ci = (ContextInfo*) ctx;
bzero(tmp, 1024);
if(OptionParse( "%d", &num, "size", tokens))
{
post_init = 1;
}
if(OptionParse("%d", &num, "font", tokens))
{
if(num>=0 && num < MAX_FONTS)
{
char *fnt = select_font( ci,num );
if(fnt!=NULL)
sprintf(ci->font, "%s",fnt);
}
post_init = 1;
}
if(post_init)
{
if(!configure( (void*) ci, num ))
{
configure( (void*)ci, 16);
}
}
// printf("Parse tokens [%s]\n", tokens);
if(OptionParse("%s", tmp, "text",tokens))
{
bzero(ci->text, 1024);
strcpy(ci->text,tmp);
bzero(tmp,1024);
}
if(OptionParse("%d", &num, "x", tokens))
{
ci->x = num;
}
if(OptionParse("%d", &num, "y", tokens))
{
ci->y = num;
}
if(OptionParse("%d", &num, "textheight",tokens))
{
ci->text_height = num;
}
if(OptionParse("%e", &num, "baseline", tokens))
{
ci->baseline = num;
}
if(OptionParse(NULL, &num, "border", tokens))
{
ci->outline = num;
}
if(OptionParse("%d", &num, "rand",tokens))
{
ci->rand_font = num;
}
if(OptionParse(NULL, &num, "bg", tokens))
{
ci->bg = num;
}
if(OptionParse("%s", &tmp, "bgcolor", tokens))
{
if(ParseColor( tmp, &(ci->bgcolor[0]), &(ci->bgcolor[1]), &(ci->bgcolor[2]) )<0)
veejay_msg(VEEJAY_MSG_ERROR, "Use hexdecimal notation (bgcolor=\"#ffffff\" ([%s])) ",tmp );
bzero(tmp,1024);
}
if(OptionParse("%s", &tmp, "fgcolor", tokens))
{
if(ParseColor( tmp, &(ci->fgcolor[0]) , &(ci->fgcolor[1]) , &(ci->fgcolor[2]) )<0)
veejay_msg(VEEJAY_MSG_ERROR, "Use hexadecimal notation (fgcolor=\"#000000\") ([%s]) ",tmp);
bzero(tmp,1024);
}
}
void Process(void *ctx, void *_info, void *_picture)
{
ContextInfo *ci = (ContextInfo *) ctx;
FT_Face face = ci->face;
FT_GlyphSlot slot = face->glyph;
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;
VJFrameInfo *info = (VJFrameInfo*) _info;
VJFrame *picture = (VJFrame*) _picture;
int width = info->width;
int height = info->height;
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));
text = buff;
size = strlen(text);
/* 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++)
{
c = text[i];
/* 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( info, picture, ci->x, ci->y, str_w_max, y - ci->y, ci->bgcolor );
}
/* Draw Glyphs */
for (i=0; i < size; i++)
{
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( info,
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;
}
}
#endif
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