1 /*****************************************************************************
2 * freetype.c : Put text on the video, using freetype2
3 *****************************************************************************
4 * Copyright (C) 2002 - 2005 VideoLAN
7 * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #ifdef HAVE_LINUX_LIMITS_H
32 # include <linux/limits.h>
38 #include "vlc_block.h"
39 #include "vlc_filter.h"
48 #include FT_FREETYPE_H
52 #define DEFAULT_FONT "/System/Library/Fonts/LucidaGrande.dfont"
53 #elif defined( SYS_BEOS )
54 #define DEFAULT_FONT "/boot/beos/etc/fonts/ttfonts/Swiss721.ttf"
55 #elif defined( WIN32 )
56 #define DEFAULT_FONT "" /* Default font found at run-time */
58 #define DEFAULT_FONT "/usr/share/fonts/truetype/freefont/FreeSerifBold.ttf"
61 #if defined(HAVE_FRIBIDI)
62 #include <fribidi/fribidi.h>
65 typedef struct line_desc_t line_desc_t;
67 /*****************************************************************************
69 *****************************************************************************/
70 static int Create ( vlc_object_t * );
71 static void Destroy( vlc_object_t * );
73 /* The RenderText call maps to pf_render_string, defined in vlc_filter.h */
74 static subpicture_region_t *RenderText( filter_t *, subpicture_t *, subpicture_region_t* );//block_t *, int, int, int );
75 static line_desc_t *NewLine( byte_t * );
77 /*****************************************************************************
79 *****************************************************************************/
80 #define FONT_TEXT N_("Font")
81 #define FONT_LONGTEXT N_("Font filename")
82 #define FONTSIZE_TEXT N_("Font size in pixels")
83 #define FONTSIZE_LONGTEXT N_("The size of the fonts used by the osd module. " \
84 "If set to something different than 0 this option will override the " \
85 "relative font size " )
86 #define OPACITY_TEXT N_("Opacity, 0..255")
87 #define OPACITY_LONGTEXT N_("The opacity (inverse of transparency) of overlay text. " \
88 "1 = transparent, 255 = totally opaque. " )
89 #define COLOR_TEXT N_("Text Default Color")
90 #define COLOR_LONGTEXT N_("The color of overlay text. 1 byte for each color, hexadecimal." \
91 "#000000 = all colors off, 0xFF0000 = just Red, 0xFFFFFF = all color on [White]" )
92 #define FONTSIZER_TEXT N_("Font size")
93 #define FONTSIZER_LONGTEXT N_("The size of the fonts used by the osd module" )
95 static int pi_sizes[] = { 20, 18, 16, 12, 6 };
96 static char *ppsz_sizes_text[] = { N_("Smaller"), N_("Small"), N_("Normal"),
97 N_("Large"), N_("Larger") };
98 static int pi_color_values[] = { 0x00000000, 0x00808080, 0x00C0C0C0, 0x00FFFFFF, 0x00800000,
99 0x00FF0000, 0x00FF00FF, 0x00FFFF00, 0x00808000, 0x00008000, 0x00008080,
100 0x0000FF00, 0x00800080, 0x00000080, 0x000000FF, 0x0000FFFF};
101 static char *ppsz_color_descriptions[] = { N_("Black"), N_("Gray"), N_("Silver"), N_("White"),
102 N_("Maroon"), N_("Red"), N_("Fuchsia"), N_("Yellow"),
103 N_("Olive"), N_("Green"), N_("Teal"), N_("Lime"), N_("Purple"),
104 N_("Navy"), N_("Blue"), N_("Aqua") };
107 set_shortname( _("Freetype"));
108 set_description( _("Freetype2 font renderer") );
109 set_category( CAT_VIDEO );
110 set_subcategory( SUBCAT_VIDEO_TEXT );
112 add_file( "freetype-font", DEFAULT_FONT, NULL, FONT_TEXT, FONT_LONGTEXT,
114 add_integer( "freetype-fontsize", 0, NULL, FONTSIZE_TEXT,
115 FONTSIZE_LONGTEXT, VLC_TRUE );
116 /* opacity valid on 0..255, with default 255 = fully opaque */
117 add_integer_with_range( "freetype-opacity", 255, 0, 255, NULL,
118 OPACITY_TEXT, OPACITY_LONGTEXT, VLC_FALSE );
119 /* hook to the color values list, with default 0x00ffffff = white */
120 add_integer( "freetype-color", 0x00FFFFFF, NULL, COLOR_TEXT, COLOR_LONGTEXT, VLC_TRUE );
121 change_integer_list( pi_color_values, ppsz_color_descriptions, 0 );
123 add_integer( "freetype-rel-fontsize", 16, NULL, FONTSIZER_TEXT,
124 FONTSIZER_LONGTEXT, VLC_FALSE );
125 change_integer_list( pi_sizes, ppsz_sizes_text, 0 );
127 set_capability( "text renderer", 100 );
128 add_shortcut( "text" );
129 set_callbacks( Create, Destroy );
133 * Private data in a subpicture. Describes a string.
135 typedef struct subpicture_data_t
139 /** The string associated with this subpicture */
141 line_desc_t *p_lines;
147 /** NULL-terminated list of glyphs making the string */
148 FT_BitmapGlyph *pp_glyphs;
149 /** list of relative positions for the glyphs */
150 FT_Vector *p_glyph_pos;
156 static subpicture_region_t *Render ( filter_t *, subpicture_t *, subpicture_data_t *, uint8_t,
158 static void FreeString( subpicture_data_t * );
159 static void FreeLine( line_desc_t * );
161 /*****************************************************************************
162 * filter_sys_t: freetype local data
163 *****************************************************************************
164 * This structure is part of the video output thread descriptor.
165 * It describes the freetype specific properties of an output thread.
166 *****************************************************************************/
169 FT_Library p_library; /* handle to library */
170 FT_Face p_face; /* handle to face object */
171 vlc_bool_t i_use_kerning;
172 uint8_t i_font_opacity; /* freetype-opacity */
173 int i_font_color; /* freetype-color */
174 int i_red, i_blue, i_green; /* function vars to render */
176 uint8_t i_opacity; /* function var to render */
177 uint8_t pi_gamma[256];
180 /*****************************************************************************
181 * Create: allocates osd-text video thread output method
182 *****************************************************************************
183 * This function allocates and initializes a Clone vout method.
184 *****************************************************************************/
185 static int Create( vlc_object_t *p_this )
187 filter_t *p_filter = (filter_t *)p_this;
189 char *psz_fontfile = NULL;
193 /* Allocate structure */
194 p_sys = malloc( sizeof( filter_sys_t ) );
197 msg_Err( p_filter, "out of memory" );
201 p_sys->p_library = 0;
202 p_sys->i_font_size = 0;
204 for( i = 0; i < 256; i++ )
206 p_sys->pi_gamma[i] = (uint8_t)( pow( (double)i * 255.0f, 0.5f ) );
209 var_Create( p_filter, "freetype-font",
210 VLC_VAR_STRING | VLC_VAR_DOINHERIT );
211 var_Create( p_filter, "freetype-fontsize",
212 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
213 var_Create( p_filter, "freetype-rel-fontsize",
214 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
215 var_Create( p_filter, "freetype-opacity", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
216 var_Get( p_filter, "freetype-opacity", &val );
217 p_sys->i_font_opacity = __MAX( __MIN( val.i_int, 255 ), 0 );
218 var_Create( p_filter, "freetype-color", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
219 var_Get( p_filter, "freetype-color", &val );
220 if ( ( val.i_int > -1 ) && ( val.i_int < 0x01000000 ) ) /* valid range */
222 p_sys->i_font_color = val.i_int;
224 else msg_Warn(p_filter, "Invalid freetype color specified, using white [0xFFFFFF]");
226 /* Look what method was requested */
227 var_Get( p_filter, "freetype-font", &val );
228 psz_fontfile = val.psz_string;
229 if( !psz_fontfile || !*psz_fontfile )
231 if( psz_fontfile ) free( psz_fontfile );
232 psz_fontfile = (char *)malloc( PATH_MAX + 1 );
234 GetWindowsDirectory( psz_fontfile, PATH_MAX + 1 );
235 strcat( psz_fontfile, "\\fonts\\arial.ttf" );
237 strcpy( psz_fontfile, DEFAULT_FONT );
239 msg_Err( p_filter, "user didn't specify a font" );
244 i_error = FT_Init_FreeType( &p_sys->p_library );
247 msg_Err( p_filter, "couldn't initialize freetype" );
251 i_error = FT_New_Face( p_sys->p_library, psz_fontfile ? psz_fontfile : "",
253 if( i_error == FT_Err_Unknown_File_Format )
255 msg_Err( p_filter, "file %s have unknown format", psz_fontfile );
260 msg_Err( p_filter, "failed to load font file %s", psz_fontfile );
264 i_error = FT_Select_Charmap( p_sys->p_face, ft_encoding_unicode );
267 msg_Err( p_filter, "Font has no unicode translation table" );
271 p_sys->i_use_kerning = FT_HAS_KERNING( p_sys->p_face );
274 var_Get( p_filter, "freetype-fontsize", &val );
277 p_sys->i_font_size = val.i_int;
281 var_Get( p_filter, "freetype-rel-fontsize", &val );
282 p_sys->i_font_size = (int)p_filter->fmt_out.video.i_height / val.i_int;
284 if( p_sys->i_font_size <= 0 )
286 msg_Warn( p_filter, "Invalid fontsize, using 12" );
287 p_sys->i_font_size = 12;
289 msg_Dbg( p_filter, "Using fontsize: %i", p_sys->i_font_size);
291 i_error = FT_Set_Pixel_Sizes( p_sys->p_face, 0, p_sys->i_font_size );
294 msg_Err( p_filter, "couldn't set font size to %d", p_sys->i_font_size );
298 if( psz_fontfile ) free( psz_fontfile );
299 p_filter->pf_render_string = RenderText;
300 p_filter->p_sys = p_sys;
304 if( p_sys->p_face ) FT_Done_Face( p_sys->p_face );
305 if( p_sys->p_library ) FT_Done_FreeType( p_sys->p_library );
306 if( psz_fontfile ) free( psz_fontfile );
311 /*****************************************************************************
312 * Destroy: destroy Clone video thread output method
313 *****************************************************************************
314 * Clean up all data and library connections
315 *****************************************************************************/
316 static void Destroy( vlc_object_t *p_this )
318 filter_t *p_filter = (filter_t *)p_this;
319 filter_sys_t *p_sys = p_filter->p_sys;
321 FT_Done_Face( p_sys->p_face );
322 FT_Done_FreeType( p_sys->p_library );
326 /*****************************************************************************
327 * Render: place string in picture
328 *****************************************************************************
329 * This function merges the previously rendered freetype glyphs into a picture
330 *****************************************************************************/
331 static subpicture_region_t *Render( filter_t *p_filter, subpicture_t *p_spu,
332 subpicture_data_t *p_string,
334 int red, int green, int blue)
336 filter_sys_t *p_sys = p_filter->p_sys;
338 uint8_t *p_y, *p_u, *p_v, *p_a;
340 int i, x, y, i_pitch;
341 uint8_t i_y, i_u, i_v; /* YUV values, derived from incoming RGB */
342 subpicture_region_t *p_region;
344 /* calculate text color components: */
345 i_y = (uint8_t) ( ( 66 * red + 129 * green + 25 * blue + 128) >> 8) + 16;
346 i_u = (uint8_t) ( ( -38 * red - 74 * green + 112 * blue + 128) >> 8) + 128;
347 i_v = (uint8_t) ( ( 112 * red - 94 * green - 18 * blue + 128) >> 8) + 128;
349 /* Create a new subpicture region */
350 memset( &fmt, 0, sizeof(video_format_t) );
351 fmt.i_chroma = VLC_FOURCC('Y','U','V','A');
352 fmt.i_aspect = VOUT_ASPECT_FACTOR;
353 fmt.i_width = fmt.i_visible_width = p_string->i_width + 2;
354 fmt.i_height = fmt.i_visible_height = p_string->i_height + 2;
355 fmt.i_x_offset = fmt.i_y_offset = 0;
356 p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt );
359 msg_Err( p_filter, "cannot allocate SPU region" );
363 p_region->i_x = p_region->i_y = 0;
364 p_y = p_region->picture.Y_PIXELS;
365 p_u = p_region->picture.U_PIXELS;
366 p_v = p_region->picture.V_PIXELS;
367 p_a = p_region->picture.A_PIXELS;
368 i_pitch = p_region->picture.Y_PITCH;
370 /* Initialize the region pixels */
371 memset( p_y, 0x00, i_pitch * p_region->fmt.i_height );
372 memset( p_u, 0x80, i_pitch * p_region->fmt.i_height );
373 memset( p_v, 0x80, i_pitch * p_region->fmt.i_height );
374 memset( p_a, 0x00, i_pitch * p_region->fmt.i_height );
376 #define pi_gamma p_sys->pi_gamma
378 for( p_line = p_string->p_lines; p_line != NULL; p_line = p_line->p_next )
380 int i_glyph_tmax = 0;
381 int i_bitmap_offset, i_offset;
382 for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
384 FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
385 i_glyph_tmax = __MAX( i_glyph_tmax, p_glyph->top );
388 for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
390 FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
392 i_offset = ( p_line->p_glyph_pos[ i ].y +
393 i_glyph_tmax - p_glyph->top + 1 ) *
394 i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 1;
396 for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
398 for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
400 if( !pi_gamma[p_glyph->bitmap.buffer[i_bitmap_offset]] )
404 p_a[i_offset + x] = ((uint16_t)p_a[i_offset + x] +
405 pi_gamma[p_glyph->bitmap.buffer[i_bitmap_offset]])*opacity/512;
406 i_offset += i_pitch; x--;
407 p_a[i_offset + x] = ((uint16_t)p_a[i_offset + x] +
408 pi_gamma[p_glyph->bitmap.buffer[i_bitmap_offset]])*opacity/512;
410 p_a[i_offset + x] = ((uint16_t)p_a[i_offset + x] +
411 pi_gamma[p_glyph->bitmap.buffer[i_bitmap_offset]])*opacity/512;
412 i_offset += i_pitch; x--;
413 p_a[i_offset + x] = ((uint16_t)p_a[i_offset + x] +
414 pi_gamma[p_glyph->bitmap.buffer[i_bitmap_offset]])*opacity/512;
420 i_offset = ( p_line->p_glyph_pos[ i ].y +
421 i_glyph_tmax - p_glyph->top + 1 ) *
422 i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 1;
424 for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
426 for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
428 p_y[i_offset + x] = i_y*opacity*pi_gamma[p_glyph->bitmap.buffer[i_bitmap_offset]]/(256*256);
429 p_u[i_offset + x] = i_u;
430 p_v[i_offset + x] = i_v;
442 * This function receives a string and creates a subpicture for it. It
443 * also calculates the size needed for this string, and renders the
444 * needed glyphs into memory. It is used as pf_add_string callback in
445 * the vout method by this module
447 static subpicture_region_t *RenderText( filter_t *p_filter,
448 subpicture_t *p_subpic,
449 subpicture_region_t *p_region )
451 filter_sys_t *p_sys = p_filter->p_sys;
452 subpicture_data_t *p_string = 0;
453 line_desc_t *p_line = 0, *p_next = 0, *p_prev = 0;
454 int i, i_pen_y, i_pen_x, i_error, i_glyph_index, i_previous;
455 uint32_t *psz_unicode, *psz_unicode_orig = 0, i_char, *psz_line_start;
458 vlc_iconv_t iconv_handle = (vlc_iconv_t)(-1);
459 int i_font_color, i_font_opacity, i_font_size;
460 subpicture_region_t *p_res;
468 if( !p_region ) return NULL;
469 psz_string = p_region->psz_text;
470 if( !psz_string || !*psz_string ) goto error;
471 i_font_color = p_region->i_font_color;
472 i_font_opacity = p_region->i_font_opacity;
473 i_font_size = p_region->i_font_size;
482 /* Create and initialize private data for the subpicture */
483 p_string = malloc( sizeof(subpicture_data_t) );
486 msg_Err( p_filter, "out of memory" );
489 p_string->p_lines = 0;
490 p_string->psz_text = strdup( psz_string );
492 psz_unicode = psz_unicode_orig =
493 malloc( ( strlen(psz_string) + 1 ) * sizeof(uint32_t) );
494 if( psz_unicode == NULL )
496 msg_Err( p_filter, "out of memory" );
499 #if defined(WORDS_BIGENDIAN)
500 iconv_handle = vlc_iconv_open( "UCS-4BE", "UTF-8" );
502 iconv_handle = vlc_iconv_open( "UCS-4LE", "UTF-8" );
504 if( iconv_handle == (vlc_iconv_t)-1 )
506 msg_Warn( p_filter, "unable to do conversion" );
510 /* Set up the glyphs for the desired font size. By definition,
511 p_sys->i_font_size is a valid value, else the initial Create would
512 have failed. Using -1 as a flag to use the freetype-fontsize */
513 if ( i_font_size < 0 )
515 FT_Set_Pixel_Sizes( p_sys->p_face, 0, p_sys->i_font_size );
519 i_error = FT_Set_Pixel_Sizes( p_sys->p_face, 0, i_font_size );
522 msg_Warn( p_filter, "Invalid font size to RenderText, using %d",
523 p_sys->i_font_size );
524 FT_Set_Pixel_Sizes( p_sys->p_face, 0, p_sys->i_font_size );
529 char *p_in_buffer, *p_out_buffer;
530 size_t i_in_bytes, i_out_bytes, i_out_bytes_left, i_ret;
531 i_in_bytes = strlen( psz_string );
532 i_out_bytes = i_in_bytes * sizeof( uint32_t );
533 i_out_bytes_left = i_out_bytes;
534 p_in_buffer = psz_string;
535 p_out_buffer = (char *)psz_unicode;
536 i_ret = vlc_iconv( iconv_handle, &p_in_buffer, &i_in_bytes,
537 &p_out_buffer, &i_out_bytes_left );
539 vlc_iconv_close( iconv_handle );
543 msg_Warn( p_filter, "failed to convert string to unicode (%s), "
544 "bytes left %d", strerror(errno), i_in_bytes );
547 *(uint32_t*)p_out_buffer = 0;
548 i_string_length = (i_out_bytes - i_out_bytes_left) / sizeof(uint32_t);
551 #if defined(HAVE_FRIBIDI)
553 uint32_t *p_fribidi_string;
554 FriBidiCharType base_dir = FRIBIDI_TYPE_ON;
555 p_fribidi_string = malloc( (i_string_length + 1) * sizeof(uint32_t) );
556 fribidi_log2vis( (FriBidiChar*)psz_unicode, i_string_length,
557 &base_dir, (FriBidiChar*)p_fribidi_string, 0, 0, 0 );
558 free( psz_unicode_orig );
559 psz_unicode = psz_unicode_orig = p_fribidi_string;
560 p_fribidi_string[ i_string_length ] = 0;
564 /* Calculate relative glyph positions and a bounding box for the
566 p_line = NewLine( psz_string );
569 msg_Err( p_filter, "out of memory" );
572 p_string->p_lines = p_line;
577 psz_line_start = psz_unicode;
579 #define face p_sys->p_face
580 #define glyph face->glyph
582 while( *psz_unicode )
584 i_char = *psz_unicode++;
585 if( i_char == '\r' ) /* ignore CR chars wherever they may be */
592 psz_line_start = psz_unicode;
593 p_next = NewLine( psz_string );
596 msg_Err( p_filter, "out of memory" );
599 p_line->p_next = p_next;
600 p_line->i_width = line.xMax;
601 p_line->i_height = face->size->metrics.height >> 6;
602 p_line->pp_glyphs[ i ] = NULL;
605 result.x = __MAX( result.x, line.xMax );
606 result.y += face->size->metrics.height >> 6;
613 i_pen_y += face->size->metrics.height >> 6;
615 msg_Dbg( p_filter, "Creating new line, i is %d", i );
621 i_glyph_index = FT_Get_Char_Index( face, i_char );
622 if( p_sys->i_use_kerning && i_glyph_index
626 FT_Get_Kerning( face, i_previous, i_glyph_index,
627 ft_kerning_default, &delta );
628 i_pen_x += delta.x >> 6;
631 p_line->p_glyph_pos[ i ].x = i_pen_x;
632 p_line->p_glyph_pos[ i ].y = i_pen_y;
633 i_error = FT_Load_Glyph( face, i_glyph_index, FT_LOAD_DEFAULT );
636 msg_Err( p_filter, "FT_Load_Glyph returned %d", i_error );
639 i_error = FT_Get_Glyph( glyph, &tmp_glyph );
642 msg_Err( p_filter, "FT_Get_Glyph returned %d", i_error );
645 FT_Glyph_Get_CBox( tmp_glyph, ft_glyph_bbox_pixels, &glyph_size );
646 i_error = FT_Glyph_To_Bitmap( &tmp_glyph, ft_render_mode_normal,
648 if( i_error ) continue;
649 p_line->pp_glyphs[ i ] = (FT_BitmapGlyph)tmp_glyph;
652 line.xMax = p_line->p_glyph_pos[i].x + glyph_size.xMax - glyph_size.xMin + ((FT_BitmapGlyph)tmp_glyph)->left;
653 if( line.xMax > p_filter->fmt_out.video.i_visible_width - 20 )
655 p_line->pp_glyphs[ i ] = NULL;
657 p_line = NewLine( psz_string );
660 p_prev->p_next = p_line;
664 p_string->p_lines = p_line;
666 while( psz_unicode > psz_line_start && *psz_unicode != ' ' )
670 if( psz_unicode == psz_line_start )
672 msg_Warn( p_filter, "unbreakable string" );
680 psz_unicode = psz_line_start;
690 line.yMax = __MAX( line.yMax, glyph_size.yMax );
691 line.yMin = __MIN( line.yMin, glyph_size.yMin );
693 i_previous = i_glyph_index;
694 i_pen_x += glyph->advance.x >> 6;
698 p_line->i_width = line.xMax;
699 p_line->i_height = face->size->metrics.height >> 6;
700 p_line->pp_glyphs[ i ] = NULL;
701 result.x = __MAX( result.x, line.xMax );
702 result.y += line.yMax - line.yMin;
703 p_string->i_height = result.y;
704 p_string->i_width = result.x;
708 /* check to see whether to use the default color/opacity, or another one: */
709 if( i_font_color < 0 )
711 p_sys->i_blue = p_sys->i_font_color & 0x000000FF;
712 p_sys->i_green = ( p_sys->i_font_color & 0x0000FF00 ) >> 8;
713 p_sys->i_red = ( p_sys->i_font_color & 0x00FF0000 ) >> 16;
717 p_sys->i_blue = i_font_color & 0x000000FF;
718 p_sys->i_green = ( i_font_color & 0x0000FF00 ) >> 8;
719 p_sys->i_red = ( i_font_color & 0x00FF0000 ) >> 16;
721 if( i_font_opacity < 0 )
723 p_sys->i_opacity = p_sys->i_font_opacity;
727 p_sys->i_opacity = (uint8_t)( i_font_opacity & 0x000000FF );
730 p_res = Render( p_filter, p_subpic, p_string, p_sys->i_opacity,
731 p_sys->i_red, p_sys->i_green, p_sys->i_blue );
732 FreeString( p_string );
733 if( psz_unicode_orig ) free( psz_unicode_orig );
737 FreeString( p_string );
738 if( p_subpic ) p_filter->pf_sub_buffer_del( p_filter, p_subpic );
739 if( psz_unicode_orig ) free( psz_unicode_orig );
743 static void FreeLine( line_desc_t *p_line )
746 for( i = 0; p_line->pp_glyphs[ i ] != NULL; i++ )
748 FT_Done_Glyph( (FT_Glyph)p_line->pp_glyphs[ i ] );
750 free( p_line->pp_glyphs );
751 free( p_line->p_glyph_pos );
755 static void FreeString( subpicture_data_t *p_string )
757 line_desc_t *p_line, *p_next;
759 if( !p_string ) return;
761 for( p_line = p_string->p_lines; p_line != NULL; p_line = p_next )
763 p_next = p_line->p_next;
767 free( p_string->psz_text );
771 static line_desc_t *NewLine( byte_t *psz_string )
774 line_desc_t *p_line = malloc( sizeof(line_desc_t) );
779 p_line->i_height = 0;
781 p_line->p_next = NULL;
783 /* We don't use CountUtf8Characters() here because we are not acutally
784 * sure the string is utf8. Better be safe than sorry. */
785 i_count = strlen( psz_string );
787 p_line->pp_glyphs = malloc( sizeof(FT_BitmapGlyph)
789 if( p_line->pp_glyphs == NULL )
794 p_line->pp_glyphs[0] = NULL;
796 p_line->p_glyph_pos = malloc( sizeof( FT_Vector )
798 if( p_line->p_glyph_pos == NULL )
800 free( p_line->pp_glyphs );