1 /*****************************************************************************
2 * quartztext.c : Put text on the video, using Mac OS X Quartz Engine
3 *****************************************************************************
4 * Copyright (C) 2007 the VideoLAN team
7 * Authors: Bernie Purcell <bitmap@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 //////////////////////////////////////////////////////////////////////////////
26 //////////////////////////////////////////////////////////////////////////////
31 #include <vlc_block.h>
32 #include <vlc_filter.h>
33 #include <vlc_stream.h>
35 #include <vlc_input.h>
39 #include <Carbon/Carbon.h>
41 #define DEFAULT_FONT "Verdana"
42 #define DEFAULT_FONT_COLOR 0xffffff
43 #define DEFAULT_REL_FONT_SIZE 16
45 #define VERTICAL_MARGIN 3
46 #define HORIZONTAL_MARGIN 10
48 //////////////////////////////////////////////////////////////////////////////
50 //////////////////////////////////////////////////////////////////////////////
51 static int Create ( vlc_object_t * );
52 static void Destroy( vlc_object_t * );
54 static int LoadFontsFromAttachments( filter_t *p_filter );
56 static int RenderText( filter_t *, subpicture_region_t *,
57 subpicture_region_t * );
58 static int RenderHtml( filter_t *, subpicture_region_t *,
59 subpicture_region_t * );
61 static int GetFontSize( filter_t *p_filter );
62 static int RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region,
63 UniChar *psz_utfString, uint32_t i_text_len,
64 uint32_t i_runs, uint32_t *pi_run_lengths,
65 ATSUStyle *pp_styles );
66 static ATSUStyle CreateStyle( char *psz_fontname, int i_font_size,
67 uint32_t i_font_color,
68 vlc_bool_t b_bold, vlc_bool_t b_italic,
70 //////////////////////////////////////////////////////////////////////////////
72 //////////////////////////////////////////////////////////////////////////////
74 // The preferred way to set font style information is for it to come from the
75 // subtitle file, and for it to be rendered with RenderHtml instead of
76 // RenderText. This module, unlike Freetype, doesn't provide any options to
77 // override the fallback font selection used when this style information is
80 set_shortname( _("Mac Text renderer"));
81 set_description( _("Quartz font renderer") );
82 set_category( CAT_VIDEO );
83 set_subcategory( SUBCAT_VIDEO_SUBPIC );
85 set_capability( "text renderer", 120 );
86 add_shortcut( "text" );
87 set_callbacks( Create, Destroy );
90 typedef struct font_stack_t font_stack_t;
95 uint32_t i_color; // ARGB
100 typedef struct offscreen_bitmap_t offscreen_bitmap_t;
101 struct offscreen_bitmap_t
104 int i_bitsPerChannel;
110 //////////////////////////////////////////////////////////////////////////////
111 // filter_sys_t: quartztext local data
112 //////////////////////////////////////////////////////////////////////////////
113 // This structure is part of the video output thread descriptor.
114 // It describes the freetype specific properties of an output thread.
115 //////////////////////////////////////////////////////////////////////////////
119 uint8_t i_font_opacity;
123 ATSFontContainerRef *p_fonts;
127 //////////////////////////////////////////////////////////////////////////////
128 // Create: allocates osd-text video thread output method
129 //////////////////////////////////////////////////////////////////////////////
130 // This function allocates and initializes a Clone vout method.
131 //////////////////////////////////////////////////////////////////////////////
132 static int Create( vlc_object_t *p_this )
134 filter_t *p_filter = (filter_t *)p_this;
137 // Allocate structure
138 p_filter->p_sys = p_sys = malloc( sizeof( filter_sys_t ) );
141 msg_Err( p_filter, "out of memory" );
144 p_sys->psz_font_name = strdup( DEFAULT_FONT );
145 p_sys->i_font_opacity = 255;
146 p_sys->i_font_color = DEFAULT_FONT_COLOR;
147 p_sys->i_font_size = GetFontSize( p_filter );
149 p_filter->pf_render_text = RenderText;
150 p_filter->pf_render_html = RenderHtml;
152 p_sys->p_fonts = NULL;
155 LoadFontsFromAttachments( p_filter );
160 //////////////////////////////////////////////////////////////////////////////
161 // Destroy: destroy Clone video thread output method
162 //////////////////////////////////////////////////////////////////////////////
163 // Clean up all data and library connections
164 //////////////////////////////////////////////////////////////////////////////
165 static void Destroy( vlc_object_t *p_this )
167 filter_t *p_filter = (filter_t *)p_this;
168 filter_sys_t *p_sys = p_filter->p_sys;
174 for( k = 0; k < p_sys->i_fonts; k++ )
176 ATSFontDeactivate( p_sys->p_fonts[k], NULL, kATSOptionFlagsDefault );
179 free( p_sys->p_fonts );
182 if( p_sys->psz_font_name ) free( p_sys->psz_font_name );
187 //////////////////////////////////////////////////////////////////////////////
188 // Make any TTF/OTF fonts present in the attachments of the media file
189 // available to the Quartz engine for text rendering
190 //////////////////////////////////////////////////////////////////////////////
191 static int LoadFontsFromAttachments( filter_t *p_filter )
193 filter_sys_t *p_sys = p_filter->p_sys;
194 input_thread_t *p_input;
195 input_attachment_t **pp_attachments;
196 int i_attachments_cnt;
198 int rv = VLC_SUCCESS;
200 p_input = (input_thread_t *)vlc_object_find( p_filter, VLC_OBJECT_INPUT, FIND_PARENT );
204 if( VLC_SUCCESS != input_Control( p_input, INPUT_GET_ATTACHMENTS, &pp_attachments, &i_attachments_cnt ))
206 vlc_object_release(p_input);
211 p_sys->p_fonts = malloc( i_attachments_cnt * sizeof( ATSFontContainerRef ) );
212 if(! p_sys->p_fonts )
215 for( k = 0; k < i_attachments_cnt; k++ )
217 input_attachment_t *p_attach = pp_attachments[k];
221 if(( !strcmp( p_attach->psz_mime, "application/x-truetype-font" ) || // TTF
222 !strcmp( p_attach->psz_mime, "application/x-font-otf" ) ) && // OTF
223 ( p_attach->i_data > 0 ) &&
224 ( p_attach->p_data != NULL ) )
226 ATSFontContainerRef container;
228 if( noErr == ATSFontActivateFromMemory( p_attach->p_data,
230 kATSFontContextLocal,
231 kATSFontFormatUnspecified,
233 kATSOptionFlagsDefault,
236 p_sys->p_fonts[ p_sys->i_fonts++ ] = container;
240 vlc_input_attachment_Delete( p_attach );
242 free( pp_attachments );
244 vlc_object_release(p_input);
249 #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4
250 // Original version of these functions available on:
251 // http://developer.apple.com/documentation/Carbon/Conceptual/QuickDrawToQuartz2D/tq_color/chapter_4_section_3.html
253 #define kGenericRGBProfilePathStr "/System/Library/ColorSync/Profiles/Generic RGB Profile.icc"
255 static CMProfileRef OpenGenericProfile( void )
257 static CMProfileRef cached_rgb_prof = NULL;
259 // Create the profile reference only once
260 if( cached_rgb_prof == NULL )
263 CMProfileLocation loc;
265 loc.locType = cmPathBasedProfile;
266 strcpy( loc.u.pathLoc.path, kGenericRGBProfilePathStr );
268 err = CMOpenProfile( &cached_rgb_prof, &loc );
272 cached_rgb_prof = NULL;
276 if( cached_rgb_prof )
278 // Clone the profile reference so that the caller has
279 // their own reference, not our cached one.
280 CMCloneProfileRef( cached_rgb_prof );
283 return cached_rgb_prof;
286 static CGColorSpaceRef CreateGenericRGBColorSpace( void )
288 static CGColorSpaceRef p_generic_rgb_cs = NULL;
290 if( p_generic_rgb_cs == NULL )
292 CMProfileRef generic_rgb_prof = OpenGenericProfile();
294 if( generic_rgb_prof )
296 p_generic_rgb_cs = CGColorSpaceCreateWithPlatformColorSpace( generic_rgb_prof );
298 CMCloseProfile( generic_rgb_prof );
302 return p_generic_rgb_cs;
306 static char *EliminateCRLF( char *psz_string )
311 for( p = psz_string; p && *p; p++ )
313 if( ( *p == '\r' ) && ( *(p+1) == '\n' ) )
315 for( q = p + 1; *q; q++ )
324 // Convert UTF-8 string to UTF-16 character array -- internal Mac Endian-ness ;
325 // we don't need to worry about bidirectional text conversion as ATSUI should
326 // handle that for us automatically
327 static void ConvertToUTF16( const char *psz_utf8_str, uint32_t *pi_strlen, UniChar **ppsz_utf16_str )
329 CFStringRef p_cfString;
332 p_cfString = CFStringCreateWithCString( NULL, psz_utf8_str, kCFStringEncodingUTF8 );
333 i_string_length = CFStringGetLength( p_cfString );
336 *pi_strlen = i_string_length;
338 if( !*ppsz_utf16_str )
339 *ppsz_utf16_str = (UniChar *) calloc( i_string_length, sizeof( UniChar ) );
341 CFStringGetCharacters( p_cfString, CFRangeMake( 0, i_string_length ), *ppsz_utf16_str );
343 CFRelease( p_cfString );
346 // Renders a text subpicture region into another one.
347 // It is used as pf_add_string callback in the vout method by this module
348 static int RenderText( filter_t *p_filter, subpicture_region_t *p_region_out,
349 subpicture_region_t *p_region_in )
351 filter_sys_t *p_sys = p_filter->p_sys;
352 UniChar *psz_utf16_str = NULL;
353 uint32_t i_string_length;
355 int i_font_color, i_font_alpha, i_font_size;
359 p_sys->i_font_size = GetFontSize( p_filter );
362 if( !p_region_in || !p_region_out ) return VLC_EGENERIC;
363 psz_string = p_region_in->psz_text;
364 if( !psz_string || !*psz_string ) return VLC_EGENERIC;
366 if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
369 if( p_region_in->p_style )
371 i_font_color = __MAX( __MIN( p_region_in->p_style->i_font_color, 0xFFFFFF ), 0 );
372 i_font_alpha = __MAX( __MIN( p_region_in->p_style->i_font_alpha, 255 ), 0 );
373 i_font_size = __MAX( __MIN( p_region_in->p_style->i_font_size, 255 ), 0 ) * i_scale / 1000;
377 i_font_color = p_sys->i_font_color;
378 i_font_alpha = 255 - p_sys->i_font_opacity;
379 i_font_size = p_sys->i_font_size;
382 if( !i_font_alpha ) i_font_alpha = 255 - p_sys->i_font_opacity;
384 ConvertToUTF16( EliminateCRLF( psz_string ), &i_string_length, &psz_utf16_str );
386 p_region_out->i_x = p_region_in->i_x;
387 p_region_out->i_y = p_region_in->i_y;
389 if( psz_utf16_str != NULL )
391 ATSUStyle p_style = CreateStyle( p_sys->psz_font_name, i_font_size,
392 (i_font_color & 0xffffff) |
393 ((i_font_alpha & 0xff) << 24),
394 VLC_FALSE, VLC_FALSE, VLC_FALSE );
397 RenderYUVA( p_filter, p_region_out, psz_utf16_str, i_string_length,
398 1, &i_string_length, &p_style );
401 ATSUDisposeStyle( p_style );
402 free( psz_utf16_str );
409 static ATSUStyle CreateStyle( char *psz_fontname, int i_font_size, uint32_t i_font_color,
410 vlc_bool_t b_bold, vlc_bool_t b_italic, vlc_bool_t b_uline )
416 float f_red = (float)(( i_font_color & 0x00FF0000 ) >> 16) / 255.0;
417 float f_green = (float)(( i_font_color & 0x0000FF00 ) >> 8) / 255.0;
418 float f_blue = (float)( i_font_color & 0x000000FF ) / 255.0;
419 float f_alpha = ( 255.0 - (float)(( i_font_color & 0xFF000000 ) >> 24)) / 255.0;
422 Fixed font_size = IntToFixed( i_font_size );
423 ATSURGBAlphaColor font_color = { f_red, f_green, f_blue, f_alpha };
424 Boolean bold = b_bold;
425 Boolean italic = b_italic;
426 Boolean uline = b_uline;
428 ATSUAttributeTag tags[] = { kATSUSizeTag, kATSURGBAlphaColorTag, kATSUQDItalicTag,
429 kATSUQDBoldfaceTag, kATSUQDUnderlineTag, kATSUFontTag };
430 ByteCount sizes[] = { sizeof( Fixed ), sizeof( ATSURGBAlphaColor ), sizeof( Boolean ),
431 sizeof( Boolean ), sizeof( Boolean ), sizeof( ATSUFontID )};
432 ATSUAttributeValuePtr values[] = { &font_size, &font_color, &italic, &bold, &uline, &font };
434 i_tag_cnt = sizeof( tags ) / sizeof( ATSUAttributeTag );
436 status = ATSUFindFontFromName( psz_fontname,
437 strlen( psz_fontname ),
444 if( status != noErr )
446 // If we can't find a suitable font, just do everything else
450 if( noErr == ATSUCreateStyle( &p_style ) )
452 if( noErr == ATSUSetAttributes( p_style, i_tag_cnt, tags, sizes, values ) )
456 ATSUDisposeStyle( p_style );
461 static int PushFont( font_stack_t **p_font, const char *psz_name, int i_size,
469 p_new = malloc( sizeof( font_stack_t ) );
473 p_new->p_next = NULL;
476 p_new->psz_name = strdup( psz_name );
478 p_new->psz_name = NULL;
480 p_new->i_size = i_size;
481 p_new->i_color = i_color;
489 font_stack_t *p_last;
491 for( p_last = *p_font;
493 p_last = p_last->p_next )
496 p_last->p_next = p_new;
501 static int PopFont( font_stack_t **p_font )
503 font_stack_t *p_last, *p_next_to_last;
505 if( !p_font || !*p_font )
508 p_next_to_last = NULL;
509 for( p_last = *p_font;
511 p_last = p_last->p_next )
513 p_next_to_last = p_last;
517 p_next_to_last->p_next = NULL;
521 free( p_last->psz_name );
527 static int PeekFont( font_stack_t **p_font, char **psz_name, int *i_size,
530 font_stack_t *p_last;
532 if( !p_font || !*p_font )
537 p_last=p_last->p_next )
540 *psz_name = p_last->psz_name;
541 *i_size = p_last->i_size;
542 *i_color = p_last->i_color;
547 static ATSUStyle GetStyleFromFontStack( filter_sys_t *p_sys,
548 font_stack_t **p_fonts, vlc_bool_t b_bold, vlc_bool_t b_italic,
551 ATSUStyle p_style = NULL;
553 char *psz_fontname = NULL;
554 uint32_t i_font_color = p_sys->i_font_color;
555 int i_font_size = p_sys->i_font_size;
557 if( VLC_SUCCESS == PeekFont( p_fonts, &psz_fontname, &i_font_size,
560 p_style = CreateStyle( psz_fontname, i_font_size, i_font_color,
561 b_bold, b_italic, b_uline );
566 static int HandleFontAttributes( xml_reader_t *p_xml_reader,
567 font_stack_t **p_fonts, int i_scale )
570 char *psz_fontname = NULL;
571 uint32_t i_font_color = 0xffffff;
572 int i_font_alpha = 0;
573 int i_font_size = 24;
575 // Default all attributes to the top font in the stack -- in case not
576 // all attributes are specified in the sub-font
577 if( VLC_SUCCESS == PeekFont( p_fonts,
582 psz_fontname = strdup( psz_fontname );
583 i_font_size = i_font_size * 1000 / i_scale;
585 i_font_alpha = (i_font_color >> 24) & 0xff;
586 i_font_color &= 0x00ffffff;
588 while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
590 char *psz_name = xml_ReaderName( p_xml_reader );
591 char *psz_value = xml_ReaderValue( p_xml_reader );
593 if( psz_name && psz_value )
595 if( !strcasecmp( "face", psz_name ) )
597 if( psz_fontname ) free( psz_fontname );
598 psz_fontname = strdup( psz_value );
600 else if( !strcasecmp( "size", psz_name ) )
602 if( ( *psz_value == '+' ) || ( *psz_value == '-' ) )
604 int i_value = atoi( psz_value );
606 if( ( i_value >= -5 ) && ( i_value <= 5 ) )
607 i_font_size += ( i_value * i_font_size ) / 10;
608 else if( i_value < -5 )
609 i_font_size = - i_value;
610 else if( i_value > 5 )
611 i_font_size = i_value;
614 i_font_size = atoi( psz_value );
616 else if( !strcasecmp( "color", psz_name ) &&
617 ( psz_value[0] == '#' ) )
619 i_font_color = strtol( psz_value + 1, NULL, 16 );
620 i_font_color &= 0x00ffffff;
622 else if( !strcasecmp( "alpha", psz_name ) &&
623 ( psz_value[0] == '#' ) )
625 i_font_alpha = strtol( psz_value + 1, NULL, 16 );
626 i_font_alpha &= 0xff;
632 rv = PushFont( p_fonts,
634 i_font_size * i_scale / 1000,
635 (i_font_color & 0xffffff) | ((i_font_alpha & 0xff) << 24) );
637 free( psz_fontname );
642 static int ProcessNodes( filter_t *p_filter,
643 xml_reader_t *p_xml_reader,
644 text_style_t *p_font_style,
649 uint32_t **ppi_run_lengths,
650 ATSUStyle **ppp_styles )
652 int rv = VLC_SUCCESS;
653 filter_sys_t *p_sys = p_filter->p_sys;
654 UniChar *psz_text_orig = psz_text;
655 font_stack_t *p_fonts = NULL;
659 char *psz_node = NULL;
661 vlc_bool_t b_italic = VLC_FALSE;
662 vlc_bool_t b_bold = VLC_FALSE;
663 vlc_bool_t b_uline = VLC_FALSE;
665 if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
670 rv = PushFont( &p_fonts,
671 p_font_style->psz_fontname,
672 p_font_style->i_font_size * i_scale / 1000,
673 (p_font_style->i_font_color & 0xffffff) |
674 ((p_font_style->i_font_alpha & 0xff) << 24) );
676 if( p_font_style->i_style_flags & STYLE_BOLD )
678 if( p_font_style->i_style_flags & STYLE_ITALIC )
680 if( p_font_style->i_style_flags & STYLE_UNDERLINE )
685 rv = PushFont( &p_fonts,
686 p_sys->psz_font_name,
688 p_sys->i_font_color );
690 if( rv != VLC_SUCCESS )
693 while ( ( xml_ReaderRead( p_xml_reader ) == 1 ) )
695 switch ( xml_ReaderNodeType( p_xml_reader ) )
697 case XML_READER_NONE:
699 case XML_READER_ENDELEM:
700 psz_node = xml_ReaderName( p_xml_reader );
704 if( !strcasecmp( "font", psz_node ) )
706 else if( !strcasecmp( "b", psz_node ) )
708 else if( !strcasecmp( "i", psz_node ) )
709 b_italic = VLC_FALSE;
710 else if( !strcasecmp( "u", psz_node ) )
716 case XML_READER_STARTELEM:
717 psz_node = xml_ReaderName( p_xml_reader );
720 if( !strcasecmp( "font", psz_node ) )
721 rv = HandleFontAttributes( p_xml_reader, &p_fonts, i_scale );
722 else if( !strcasecmp( "b", psz_node ) )
724 else if( !strcasecmp( "i", psz_node ) )
726 else if( !strcasecmp( "u", psz_node ) )
728 else if( !strcasecmp( "br", psz_node ) )
730 uint32_t i_string_length;
732 ConvertToUTF16( "\n", &i_string_length, &psz_text );
733 psz_text += i_string_length;
738 *ppp_styles = (ATSUStyle *) realloc( *ppp_styles, *pi_runs * sizeof( ATSUStyle ) );
740 *ppp_styles = (ATSUStyle *) malloc( *pi_runs * sizeof( ATSUStyle ) );
742 (*ppp_styles)[ *pi_runs - 1 ] = GetStyleFromFontStack( p_sys, &p_fonts, b_bold, b_italic, b_uline );
744 if( *ppi_run_lengths )
745 *ppi_run_lengths = (uint32_t *) realloc( *ppi_run_lengths, *pi_runs * sizeof( uint32_t ) );
747 *ppi_run_lengths = (uint32_t *) malloc( *pi_runs * sizeof( uint32_t ) );
749 (*ppi_run_lengths)[ *pi_runs - 1 ] = i_string_length;
754 case XML_READER_TEXT:
755 psz_node = xml_ReaderValue( p_xml_reader );
758 uint32_t i_string_length;
760 // Turn any multiple-whitespaces into single spaces
761 char *s = strpbrk( psz_node, "\t\r\n " );
764 int i_whitespace = strspn( s, "\t\r\n " );
766 if( i_whitespace > 1 )
769 strlen( s ) - i_whitespace + 1 );
772 s = strpbrk( s, "\t\r\n " );
775 ConvertToUTF16( psz_node, &i_string_length, &psz_text );
776 psz_text += i_string_length;
781 *ppp_styles = (ATSUStyle *) realloc( *ppp_styles, *pi_runs * sizeof( ATSUStyle ) );
783 *ppp_styles = (ATSUStyle *) malloc( *pi_runs * sizeof( ATSUStyle ) );
785 (*ppp_styles)[ *pi_runs - 1 ] = GetStyleFromFontStack( p_sys, &p_fonts, b_bold, b_italic, b_uline );
787 if( *ppi_run_lengths )
788 *ppi_run_lengths = (uint32_t *) realloc( *ppi_run_lengths, *pi_runs * sizeof( uint32_t ) );
790 *ppi_run_lengths = (uint32_t *) malloc( *pi_runs * sizeof( uint32_t ) );
792 (*ppi_run_lengths)[ *pi_runs - 1 ] = i_string_length;
800 *pi_len = psz_text - psz_text_orig;
802 while( VLC_SUCCESS == PopFont( &p_fonts ) );
807 static int RenderHtml( filter_t *p_filter, subpicture_region_t *p_region_out,
808 subpicture_region_t *p_region_in )
810 int rv = VLC_SUCCESS;
811 stream_t *p_sub = NULL;
813 xml_reader_t *p_xml_reader = NULL;
815 if( !p_region_in || !p_region_in->psz_html )
818 /* Reset the default fontsize in case screen metrics have changed */
819 p_filter->p_sys->i_font_size = GetFontSize( p_filter );
821 p_sub = stream_MemoryNew( VLC_OBJECT(p_filter),
822 (uint8_t *) p_region_in->psz_html,
823 strlen( p_region_in->psz_html ),
827 p_xml = xml_Create( p_filter );
830 vlc_bool_t b_karaoke = VLC_FALSE;
832 p_xml_reader = xml_ReaderCreate( p_xml, p_sub );
835 /* Look for Root Node */
836 if( xml_ReaderRead( p_xml_reader ) == 1 )
838 char *psz_node = xml_ReaderName( p_xml_reader );
840 if( !strcasecmp( "karaoke", psz_node ) )
842 /* We're going to have to render the text a number
843 * of times to show the progress marker on the text.
845 var_SetBool( p_filter, "text-rerender", VLC_TRUE );
846 b_karaoke = VLC_TRUE;
848 else if( !strcasecmp( "text", psz_node ) )
850 b_karaoke = VLC_FALSE;
854 /* Only text and karaoke tags are supported */
855 xml_ReaderDelete( p_xml, p_xml_reader );
869 uint32_t *pi_run_lengths = NULL;
870 ATSUStyle *pp_styles = NULL;
872 psz_text = (UniChar *) malloc( strlen( p_region_in->psz_html ) *
878 rv = ProcessNodes( p_filter, p_xml_reader,
879 p_region_in->p_style, psz_text, &i_len,
880 &i_runs, &pi_run_lengths, &pp_styles );
882 p_region_out->i_x = p_region_in->i_x;
883 p_region_out->i_y = p_region_in->i_y;
885 if(( rv == VLC_SUCCESS ) && ( i_len > 0 ))
887 RenderYUVA( p_filter, p_region_out, psz_text, i_len, i_runs,
888 pi_run_lengths, pp_styles);
891 for( k=0; k<i_runs; k++)
892 ATSUDisposeStyle( pp_styles[k] );
894 free( pi_run_lengths );
898 xml_ReaderDelete( p_xml, p_xml_reader );
902 stream_Delete( p_sub );
908 static CGContextRef CreateOffScreenContext( int i_width, int i_height,
909 offscreen_bitmap_t **pp_memory, CGColorSpaceRef *pp_colorSpace )
911 offscreen_bitmap_t *p_bitmap;
912 CGContextRef p_context = NULL;
914 p_bitmap = (offscreen_bitmap_t *) malloc( sizeof( offscreen_bitmap_t ));
917 p_bitmap->i_bitsPerChannel = 8;
918 p_bitmap->i_bitsPerPixel = 4 * p_bitmap->i_bitsPerChannel; // A,R,G,B
919 p_bitmap->i_bytesPerPixel = p_bitmap->i_bitsPerPixel / 8;
920 p_bitmap->i_bytesPerRow = i_width * p_bitmap->i_bytesPerPixel;
922 p_bitmap->p_data = calloc( i_height, p_bitmap->i_bytesPerRow );
924 #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_4
925 *pp_colorSpace = CGColorSpaceCreateWithName( kCGColorSpaceGenericRGB );
927 *pp_colorSpace = CreateGenericRGBColorSpace();
930 if( p_bitmap->p_data && *pp_colorSpace )
932 p_context = CGBitmapContextCreate( p_bitmap->p_data, i_width, i_height,
933 p_bitmap->i_bitsPerChannel, p_bitmap->i_bytesPerRow,
934 *pp_colorSpace, kCGImageAlphaPremultipliedFirst);
938 #if MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_1
939 // OS X 10.1 doesn't support weak linking of this call which is only available
940 // int 10.4 and later
941 if( CGContextSetAllowsAntialiasing != NULL )
943 CGContextSetAllowsAntialiasing( p_context, true );
947 *pp_memory = p_bitmap;
953 static offscreen_bitmap_t *Compose( int i_text_align, UniChar *psz_utf16_str, uint32_t i_text_len,
954 uint32_t i_runs, uint32_t *pi_run_lengths, ATSUStyle *pp_styles,
955 int i_width, int i_height, int *pi_textblock_height )
957 offscreen_bitmap_t *p_offScreen = NULL;
958 CGColorSpaceRef p_colorSpace = NULL;
959 CGContextRef p_context = NULL;
961 p_context = CreateOffScreenContext( i_width, i_height, &p_offScreen, &p_colorSpace );
965 ATSUTextLayout p_textLayout;
966 OSStatus status = noErr;
968 status = ATSUCreateTextLayoutWithTextPtr( psz_utf16_str, 0, i_text_len, i_text_len,
970 (const UniCharCount *) pi_run_lengths,
973 if( status == noErr )
975 // Attach our offscreen Image Graphics Context to the text style
976 // and setup the line alignment (have to specify the line width
977 // also in order for our chosen alignment to work)
979 Fract alignment = kATSUStartAlignment;
980 Fixed line_width = Long2Fix( i_width - HORIZONTAL_MARGIN * 2 );
982 ATSUAttributeTag tags[] = { kATSUCGContextTag, kATSULineFlushFactorTag, kATSULineWidthTag };
983 ByteCount sizes[] = { sizeof( CGContextRef ), sizeof( Fract ), sizeof( Fixed ) };
984 ATSUAttributeValuePtr values[] = { &p_context, &alignment, &line_width };
986 int i_tag_cnt = sizeof( tags ) / sizeof( ATSUAttributeTag );
988 if( i_text_align == SUBPICTURE_ALIGN_RIGHT )
990 alignment = kATSUEndAlignment;
992 else if( i_text_align != SUBPICTURE_ALIGN_LEFT )
994 alignment = kATSUCenterAlignment;
997 ATSUSetLayoutControls( p_textLayout, i_tag_cnt, tags, sizes, values );
999 // let ATSUI deal with characters not-in-our-specified-font
1000 ATSUSetTransientFontMatching( p_textLayout, true );
1002 Fixed x = Long2Fix( HORIZONTAL_MARGIN );
1003 Fixed y = Long2Fix( i_height );
1005 // Set the line-breaks and draw individual lines
1006 uint32_t i_start = 0;
1007 uint32_t i_end = i_text_len;
1009 // Set up black outlining of the text --
1010 CGContextSetRGBStrokeColor( p_context, 0, 0, 0, 0.5 );
1011 CGContextSetTextDrawingMode( p_context, kCGTextFillStroke );
1015 // ATSUBreakLine will automatically pick up any manual '\n's also
1016 status = ATSUBreakLine( p_textLayout, i_start, line_width, true, (UniCharArrayOffset *) &i_end );
1017 if( ( status == noErr ) || ( status == kATSULineBreakInWord ) )
1021 uint32_t i_actualSize;
1023 // Come down far enough to fit the height of this line --
1024 ATSUGetLineControl( p_textLayout, i_start, kATSULineAscentTag,
1025 sizeof( Fixed ), &ascent, (ByteCount *) &i_actualSize );
1027 // Quartz uses an upside-down co-ordinate space -> y values decrease as
1028 // you move down the page
1031 // Set the outlining for this line to be dependant on the size of the line -
1032 // make it about 5% of the ascent, with a minimum at 1.0
1033 float f_thickness = FixedToFloat( ascent ) * 0.05;
1034 CGContextSetLineWidth( p_context, (( f_thickness > 1.0 ) ? 1.0 : f_thickness ));
1036 ATSUDrawText( p_textLayout, i_start, i_end - i_start, x, y );
1038 // and now prepare for the next line by coming down far enough for our
1040 ATSUGetLineControl( p_textLayout, i_start, kATSULineDescentTag,
1041 sizeof( Fixed ), &descent, (ByteCount *) &i_actualSize );
1049 while( i_end < i_text_len );
1051 *pi_textblock_height = i_height - Fix2Long( y );
1052 CGContextFlush( p_context );
1054 ATSUDisposeTextLayout( p_textLayout );
1057 CGContextRelease( p_context );
1059 if( p_colorSpace ) CGColorSpaceRelease( p_colorSpace );
1064 static int GetFontSize( filter_t *p_filter )
1066 return p_filter->fmt_out.video.i_height / DEFAULT_REL_FONT_SIZE;
1069 static int RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region, UniChar *psz_utf16_str,
1070 uint32_t i_text_len, uint32_t i_runs, uint32_t *pi_run_lengths, ATSUStyle *pp_styles )
1072 offscreen_bitmap_t *p_offScreen = NULL;
1073 int i_textblock_height = 0;
1075 int i_width = p_filter->fmt_out.video.i_visible_width;
1076 int i_height = p_filter->fmt_out.video.i_visible_height;
1077 int i_text_align = p_region->i_align & 0x3;
1079 if( !psz_utf16_str )
1081 msg_Err( p_filter, "Invalid argument to RenderYUVA" );
1082 return VLC_EGENERIC;
1085 p_offScreen = Compose( i_text_align, psz_utf16_str, i_text_len,
1086 i_runs, pi_run_lengths, pp_styles,
1087 i_width, i_height, &i_textblock_height );
1091 msg_Err( p_filter, "No offscreen buffer" );
1092 return VLC_EGENERIC;
1095 uint8_t *p_dst_y,*p_dst_u,*p_dst_v,*p_dst_a;
1097 int x, y, i_offset, i_pitch;
1098 uint8_t i_y, i_u, i_v; // YUV values, derived from incoming RGB
1099 subpicture_region_t *p_region_tmp;
1101 // Create a new subpicture region
1102 memset( &fmt, 0, sizeof(video_format_t) );
1103 fmt.i_chroma = VLC_FOURCC('Y','U','V','A');
1105 fmt.i_width = fmt.i_visible_width = i_width;
1106 fmt.i_height = fmt.i_visible_height = i_textblock_height + VERTICAL_MARGIN * 2;
1107 fmt.i_x_offset = fmt.i_y_offset = 0;
1108 p_region_tmp = spu_CreateRegion( p_filter, &fmt );
1111 msg_Err( p_filter, "cannot allocate SPU region" );
1112 return VLC_EGENERIC;
1114 p_region->fmt = p_region_tmp->fmt;
1115 p_region->picture = p_region_tmp->picture;
1116 free( p_region_tmp );
1118 p_dst_y = p_region->picture.Y_PIXELS;
1119 p_dst_u = p_region->picture.U_PIXELS;
1120 p_dst_v = p_region->picture.V_PIXELS;
1121 p_dst_a = p_region->picture.A_PIXELS;
1122 i_pitch = p_region->picture.A_PITCH;
1124 i_offset = VERTICAL_MARGIN *i_pitch;
1125 for( y=0; y<i_textblock_height; y++)
1127 for( x=0; x<i_width; x++)
1129 int i_alpha = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel ];
1130 int i_red = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 1 ];
1131 int i_green = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 2 ];
1132 int i_blue = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 3 ];
1134 i_y = (uint8_t)__MIN(abs( 2104 * i_red + 4130 * i_green +
1135 802 * i_blue + 4096 + 131072 ) >> 13, 235);
1136 i_u = (uint8_t)__MIN(abs( -1214 * i_red + -2384 * i_green +
1137 3598 * i_blue + 4096 + 1048576) >> 13, 240);
1138 i_v = (uint8_t)__MIN(abs( 3598 * i_red + -3013 * i_green +
1139 -585 * i_blue + 4096 + 1048576) >> 13, 240);
1141 p_dst_y[ i_offset + x ] = i_y;
1142 p_dst_u[ i_offset + x ] = i_u;
1143 p_dst_v[ i_offset + x ] = i_v;
1144 p_dst_a[ i_offset + x ] = i_alpha;
1146 i_offset += i_pitch;
1149 free( p_offScreen->p_data );
1150 free( p_offScreen );