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 RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region,
62 UniChar *psz_utfString, uint32_t i_text_len,
63 uint32_t i_runs, uint32_t *pi_run_lengths,
64 ATSUStyle *pp_styles );
65 static ATSUStyle CreateStyle( char *psz_fontname, int i_font_size,
66 int i_font_color, int i_font_alpha,
67 vlc_bool_t b_bold, vlc_bool_t b_italic,
69 //////////////////////////////////////////////////////////////////////////////
71 //////////////////////////////////////////////////////////////////////////////
73 // The preferred way to set font style information is for it to come from the
74 // subtitle file, and for it to be rendered with RenderHtml instead of
75 // RenderText. This module, unlike Freetype, doesn't provide any options to
76 // override the fallback font selection used when this style information is
79 set_shortname( _("Mac Text renderer"));
80 set_description( _("Quartz font renderer") );
81 set_category( CAT_VIDEO );
82 set_subcategory( SUBCAT_VIDEO_SUBPIC );
84 set_capability( "text renderer", 120 );
85 add_shortcut( "text" );
86 set_callbacks( Create, Destroy );
89 typedef struct font_stack_t font_stack_t;
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 = p_filter->fmt_out.video.i_height / DEFAULT_REL_FONT_SIZE;
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 ))
208 p_sys->p_fonts = malloc( i_attachments_cnt * sizeof( ATSFontContainerRef ) );
209 if(! p_sys->p_fonts )
212 for( k = 0; k < i_attachments_cnt; k++ )
214 input_attachment_t *p_attach = pp_attachments[k];
218 if(( !strcmp( p_attach->psz_mime, "application/x-truetype-font" ) || // TTF
219 !strcmp( p_attach->psz_mime, "application/x-font-otf" ) ) && // OTF
220 ( p_attach->i_data > 0 ) &&
221 ( p_attach->p_data != NULL ) )
223 ATSFontContainerRef container;
225 if( noErr == ATSFontActivateFromMemory( p_attach->p_data,
227 kATSFontContextLocal,
228 kATSFontFormatUnspecified,
230 kATSOptionFlagsDefault,
233 p_sys->p_fonts[ p_sys->i_fonts++ ] = container;
237 vlc_input_attachment_Delete( p_attach );
239 free( pp_attachments );
244 #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4
245 // Original version of these functions available on:
246 // http://developer.apple.com/documentation/Carbon/Conceptual/QuickDrawToQuartz2D/tq_color/chapter_4_section_3.html
248 #define kGenericRGBProfilePathStr "/System/Library/ColorSync/Profiles/Generic RGB Profile.icc"
250 static CMProfileRef OpenGenericProfile( void )
252 static CMProfileRef cached_rgb_prof = NULL;
254 // Create the profile reference only once
255 if( cached_rgb_prof == NULL )
258 CMProfileLocation loc;
260 loc.locType = cmPathBasedProfile;
261 strcpy( loc.u.pathLoc.path, kGenericRGBProfilePathStr );
263 err = CMOpenProfile( &cached_rgb_prof, &loc );
267 cached_rgb_prof = NULL;
271 if( cached_rgb_prof )
273 // Clone the profile reference so that the caller has
274 // their own reference, not our cached one.
275 CMCloneProfileRef( cached_rgb_prof );
278 return cached_rgb_prof;
281 static CGColorSpaceRef CreateGenericRGBColorSpace( void )
283 static CGColorSpaceRef p_generic_rgb_cs = NULL;
285 if( p_generic_rgb_cs == NULL )
287 CMProfileRef generic_rgb_prof = OpenGenericProfile();
289 if( generic_rgb_prof )
291 p_generic_rgb_cs = CGColorSpaceCreateWithPlatformColorSpace( generic_rgb_prof );
293 CMCloseProfile( generic_rgb_prof );
297 return p_generic_rgb_cs;
301 static char *EliminateCRLF( char *psz_string )
306 for( p = psz_string; p && *p; p++ )
308 if( ( *p == '\r' ) && ( *(p+1) == '\n' ) )
310 for( q = p + 1; *q; q++ )
319 // Convert UTF-8 string to UTF-16 character array -- internal Mac Endian-ness ;
320 // we don't need to worry about bidirectional text conversion as ATSUI should
321 // handle that for us automatically
322 static void ConvertToUTF16( const char *psz_utf8_str, uint32_t *pi_strlen, UniChar **ppsz_utf16_str )
324 CFStringRef p_cfString;
327 p_cfString = CFStringCreateWithCString( NULL, psz_utf8_str, kCFStringEncodingUTF8 );
328 i_string_length = CFStringGetLength( p_cfString );
331 *pi_strlen = i_string_length;
333 if( !*ppsz_utf16_str )
334 *ppsz_utf16_str = (UniChar *) calloc( i_string_length, sizeof( UniChar ) );
336 CFStringGetCharacters( p_cfString, CFRangeMake( 0, i_string_length ), *ppsz_utf16_str );
338 CFRelease( p_cfString );
341 // Renders a text subpicture region into another one.
342 // It is used as pf_add_string callback in the vout method by this module
343 static int RenderText( filter_t *p_filter, subpicture_region_t *p_region_out,
344 subpicture_region_t *p_region_in )
346 filter_sys_t *p_sys = p_filter->p_sys;
347 UniChar *psz_utf16_str = NULL;
348 uint32_t i_string_length;
350 int i_font_color, i_font_alpha, i_font_size;
353 if( !p_region_in || !p_region_out ) return VLC_EGENERIC;
354 psz_string = p_region_in->psz_text;
355 if( !psz_string || !*psz_string ) return VLC_EGENERIC;
357 if( p_region_in->p_style )
359 i_font_color = __MAX( __MIN( p_region_in->p_style->i_font_color, 0xFFFFFF ), 0 );
360 i_font_alpha = __MAX( __MIN( p_region_in->p_style->i_font_alpha, 255 ), 0 );
361 i_font_size = __MAX( __MIN( p_region_in->p_style->i_font_size, 255 ), 0 );
365 i_font_color = p_sys->i_font_color;
366 i_font_alpha = 255 - p_sys->i_font_opacity;
367 i_font_size = p_sys->i_font_size;
370 if( !i_font_alpha ) i_font_alpha = 255 - p_sys->i_font_opacity;
372 ConvertToUTF16( EliminateCRLF( psz_string ), &i_string_length, &psz_utf16_str );
374 p_region_out->i_x = p_region_in->i_x;
375 p_region_out->i_y = p_region_in->i_y;
377 if( psz_utf16_str != NULL )
379 ATSUStyle p_style = CreateStyle( p_sys->psz_font_name, i_font_size,
380 i_font_color, i_font_alpha,
381 VLC_FALSE, VLC_FALSE, VLC_FALSE );
384 RenderYUVA( p_filter, p_region_out, psz_utf16_str, i_string_length,
385 1, &i_string_length, &p_style );
388 ATSUDisposeStyle( p_style );
389 free( psz_utf16_str );
396 static ATSUStyle CreateStyle( char *psz_fontname, int i_font_size, int i_font_color, int i_font_alpha,
397 vlc_bool_t b_bold, vlc_bool_t b_italic, vlc_bool_t b_uline )
403 float f_red = (float)(( i_font_color & 0x00FF0000 ) >> 16) / 255.0;
404 float f_green = (float)(( i_font_color & 0x0000FF00 ) >> 8) / 255.0;
405 float f_blue = (float)( i_font_color & 0x000000FF ) / 255.0;
406 float f_alpha = ( 255.0 - (float)i_font_alpha) / 255.0;
409 Fixed font_size = IntToFixed( i_font_size );
410 ATSURGBAlphaColor font_color = { f_red, f_green, f_blue, f_alpha };
411 Boolean bold = b_bold;
412 Boolean italic = b_italic;
413 Boolean uline = b_uline;
415 ATSUAttributeTag tags[] = { kATSUSizeTag, kATSURGBAlphaColorTag, kATSUQDItalicTag,
416 kATSUQDBoldfaceTag, kATSUQDUnderlineTag, kATSUFontTag };
417 ByteCount sizes[] = { sizeof( Fixed ), sizeof( ATSURGBAlphaColor ), sizeof( Boolean ),
418 sizeof( Boolean ), sizeof( Boolean ), sizeof( ATSUFontID )};
419 ATSUAttributeValuePtr values[] = { &font_size, &font_color, &italic, &bold, &uline, &font };
421 i_tag_cnt = sizeof( tags ) / sizeof( ATSUAttributeTag );
423 status = ATSUFindFontFromName( psz_fontname,
424 strlen( psz_fontname ),
431 if( status != noErr )
433 // If we can't find a suitable font, just do everything else
437 if( noErr == ATSUCreateStyle( &p_style ) )
439 if( noErr == ATSUSetAttributes( p_style, i_tag_cnt, tags, sizes, values ) )
443 ATSUDisposeStyle( p_style );
448 static int PushFont( font_stack_t **p_font, const char *psz_name, int i_size,
449 int i_color, int i_alpha )
456 p_new = malloc( sizeof( font_stack_t ) );
457 p_new->p_next = NULL;
460 p_new->psz_name = strdup( psz_name );
462 p_new->psz_name = NULL;
464 p_new->i_size = i_size;
465 p_new->i_color = i_color;
466 p_new->i_alpha = i_alpha;
474 font_stack_t *p_last;
476 for( p_last = *p_font;
478 p_last = p_last->p_next )
481 p_last->p_next = p_new;
486 static int PopFont( font_stack_t **p_font )
488 font_stack_t *p_last, *p_next_to_last;
490 if( !p_font || !*p_font )
493 p_next_to_last = NULL;
494 for( p_last = *p_font;
496 p_last = p_last->p_next )
498 p_next_to_last = p_last;
502 p_next_to_last->p_next = NULL;
506 free( p_last->psz_name );
512 static int PeekFont( font_stack_t **p_font, char **psz_name, int *i_size,
513 int *i_color, int *i_alpha )
515 font_stack_t *p_last;
517 if( !p_font || !*p_font )
522 p_last=p_last->p_next )
525 *psz_name = p_last->psz_name;
526 *i_size = p_last->i_size;
527 *i_color = p_last->i_color;
528 *i_alpha = p_last->i_alpha;
533 static ATSUStyle GetStyleFromFontStack( filter_sys_t *p_sys, font_stack_t **p_fonts,
534 vlc_bool_t b_bold, vlc_bool_t b_italic, vlc_bool_t b_uline )
536 ATSUStyle p_style = NULL;
538 char *psz_fontname = NULL;
539 int i_font_color = p_sys->i_font_color;
540 int i_font_alpha = 0;
541 int i_font_size = p_sys->i_font_size;
543 if( VLC_SUCCESS == PeekFont( p_fonts, &psz_fontname, &i_font_size, &i_font_color, &i_font_alpha ) )
545 p_style = CreateStyle( psz_fontname, i_font_size, i_font_color, i_font_alpha,
546 b_bold, b_italic, b_uline );
551 static void ProcessNodes( filter_t *p_filter, xml_reader_t *p_xml_reader,
552 text_style_t *p_font_style, UniChar *psz_text, int *pi_len,
553 uint32_t *pi_runs, uint32_t **ppi_run_lengths,
554 ATSUStyle **ppp_styles)
556 filter_sys_t *p_sys = p_filter->p_sys;
557 UniChar *psz_text_orig = psz_text;
558 font_stack_t *p_fonts = NULL;
560 char *psz_node = NULL;
562 vlc_bool_t b_italic = VLC_FALSE;
563 vlc_bool_t b_bold = VLC_FALSE;
564 vlc_bool_t b_uline = VLC_FALSE;
569 p_font_style->psz_fontname,
570 p_font_style->i_font_size,
571 p_font_style->i_font_color,
572 p_font_style->i_font_alpha );
574 if( p_font_style->i_style_flags & STYLE_BOLD )
576 if( p_font_style->i_style_flags & STYLE_ITALIC )
578 if( p_font_style->i_style_flags & STYLE_UNDERLINE )
583 PushFont( &p_fonts, p_sys->psz_font_name, p_sys->i_font_size, p_sys->i_font_color, 0 );
586 while ( ( xml_ReaderRead( p_xml_reader ) == 1 ) )
588 switch ( xml_ReaderNodeType( p_xml_reader ) )
590 case XML_READER_NONE:
592 case XML_READER_ENDELEM:
593 psz_node = xml_ReaderName( p_xml_reader );
597 if( !strcasecmp( "font", psz_node ) )
599 else if( !strcasecmp( "b", psz_node ) )
601 else if( !strcasecmp( "i", psz_node ) )
602 b_italic = VLC_FALSE;
603 else if( !strcasecmp( "u", psz_node ) )
609 case XML_READER_STARTELEM:
610 psz_node = xml_ReaderName( p_xml_reader );
613 if( !strcasecmp( "font", psz_node ) )
615 char *psz_fontname = NULL;
616 int i_font_color = 0xffffff;
617 int i_font_alpha = 0;
618 int i_font_size = 24;
620 // Default all attributes to the top font in the stack -- in case not
621 // all attributes are specified in the sub-font
622 if( VLC_SUCCESS == PeekFont( &p_fonts, &psz_fontname, &i_font_size, &i_font_color, &i_font_alpha ))
624 psz_fontname = strdup( psz_fontname );
627 while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
629 char *psz_name = xml_ReaderName ( p_xml_reader );
630 char *psz_value = xml_ReaderValue ( p_xml_reader );
632 if( psz_name && psz_value )
634 if( !strcasecmp( "face", psz_name ) )
636 if( psz_fontname ) free( psz_fontname );
637 psz_fontname = strdup( psz_value );
639 else if( !strcasecmp( "size", psz_name ) )
641 if( ( *psz_value == '+' ) || ( *psz_value == '-' ) )
643 int i_value = atoi( psz_value );
645 if( ( i_value >= -5 ) && ( i_value <= 5 ) )
646 i_font_size += ( i_value * i_font_size ) / 10;
647 else if( i_value < -5 )
648 i_font_size = - i_value;
649 else if( i_value > 5 )
650 i_font_size = i_value;
653 i_font_size = atoi( psz_value );
655 else if( !strcasecmp( "color", psz_name ) &&
656 ( psz_value[0] == '#' ) )
658 i_font_color = strtol( psz_value+1, NULL, 16 );
659 i_font_color &= 0x00ffffff;
661 else if( !strcasecmp( "alpha", psz_name ) &&
662 ( psz_value[0] == '#' ) )
664 i_font_alpha = strtol( psz_value+1, NULL, 16 );
665 i_font_alpha &= 0xff;
671 PushFont( &p_fonts, psz_fontname, i_font_size, i_font_color, i_font_alpha );
672 free( psz_fontname );
674 else if( !strcasecmp( "b", psz_node ) )
678 else if( !strcasecmp( "i", psz_node ) )
682 else if( !strcasecmp( "u", psz_node ) )
686 else if( !strcasecmp( "br", psz_node ) )
688 uint32_t i_string_length;
690 ConvertToUTF16( "\n", &i_string_length, &psz_text );
691 psz_text += i_string_length;
696 *ppp_styles = (ATSUStyle *) realloc( *ppp_styles, *pi_runs * sizeof( ATSUStyle ) );
698 *ppp_styles = (ATSUStyle *) malloc( *pi_runs * sizeof( ATSUStyle ) );
700 (*ppp_styles)[ *pi_runs - 1 ] = GetStyleFromFontStack( p_sys, &p_fonts, b_bold, b_italic, b_uline );
702 if( *ppi_run_lengths )
703 *ppi_run_lengths = (uint32_t *) realloc( *ppi_run_lengths, *pi_runs * sizeof( uint32_t ) );
705 *ppi_run_lengths = (uint32_t *) malloc( *pi_runs * sizeof( uint32_t ) );
707 (*ppi_run_lengths)[ *pi_runs - 1 ] = i_string_length;
712 case XML_READER_TEXT:
713 psz_node = xml_ReaderValue( p_xml_reader );
716 uint32_t i_string_length;
718 // Turn any multiple-whitespaces into single spaces
719 char *s = strpbrk( psz_node, "\t\r\n " );
722 int i_whitespace = strspn( s, "\t\r\n " );
724 if( i_whitespace > 1 )
727 strlen( s ) - i_whitespace + 1 );
730 s = strpbrk( s, "\t\r\n " );
733 ConvertToUTF16( psz_node, &i_string_length, &psz_text );
734 psz_text += i_string_length;
739 *ppp_styles = (ATSUStyle *) realloc( *ppp_styles, *pi_runs * sizeof( ATSUStyle ) );
741 *ppp_styles = (ATSUStyle *) malloc( *pi_runs * sizeof( ATSUStyle ) );
743 (*ppp_styles)[ *pi_runs - 1 ] = GetStyleFromFontStack( p_sys, &p_fonts, b_bold, b_italic, b_uline );
745 if( *ppi_run_lengths )
746 *ppi_run_lengths = (uint32_t *) realloc( *ppi_run_lengths, *pi_runs * sizeof( uint32_t ) );
748 *ppi_run_lengths = (uint32_t *) malloc( *pi_runs * sizeof( uint32_t ) );
750 (*ppi_run_lengths)[ *pi_runs - 1 ] = i_string_length;
758 *pi_len = psz_text - psz_text_orig;
760 while( VLC_SUCCESS == PopFont( &p_fonts ) );
763 static int RenderHtml( filter_t *p_filter, subpicture_region_t *p_region_out,
764 subpicture_region_t *p_region_in )
766 int rv = VLC_SUCCESS;
767 stream_t *p_sub = NULL;
769 xml_reader_t *p_xml_reader = NULL;
771 if( !p_region_in || !p_region_in->psz_html )
774 p_sub = stream_MemoryNew( VLC_OBJECT(p_filter),
775 (uint8_t *) p_region_in->psz_html,
776 strlen( p_region_in->psz_html ),
780 p_xml = xml_Create( p_filter );
783 p_xml_reader = xml_ReaderCreate( p_xml, p_sub );
789 uint32_t *pi_run_lengths = NULL;
790 ATSUStyle *pp_styles = NULL;
792 psz_text = (UniChar *) calloc( strlen( p_region_in->psz_html ), sizeof( UniChar ) );
797 ProcessNodes( p_filter, p_xml_reader, p_region_in->p_style, psz_text,
798 &i_len, &i_runs, &pi_run_lengths, &pp_styles );
800 p_region_out->i_x = p_region_in->i_x;
801 p_region_out->i_y = p_region_in->i_y;
803 RenderYUVA( p_filter, p_region_out, psz_text, i_len, i_runs, pi_run_lengths, pp_styles);
805 for( k=0; k<i_runs; k++)
806 ATSUDisposeStyle( pp_styles[k] );
808 free( pi_run_lengths );
813 xml_ReaderDelete( p_xml, p_xml_reader );
817 stream_Delete( p_sub );
823 static CGContextRef CreateOffScreenContext( int i_width, int i_height,
824 offscreen_bitmap_t **pp_memory, CGColorSpaceRef *pp_colorSpace )
826 offscreen_bitmap_t *p_bitmap;
827 CGContextRef p_context = NULL;
829 p_bitmap = (offscreen_bitmap_t *) malloc( sizeof( offscreen_bitmap_t ));
832 p_bitmap->i_bitsPerChannel = 8;
833 p_bitmap->i_bitsPerPixel = 4 * p_bitmap->i_bitsPerChannel; // A,R,G,B
834 p_bitmap->i_bytesPerPixel = p_bitmap->i_bitsPerPixel / 8;
835 p_bitmap->i_bytesPerRow = i_width * p_bitmap->i_bytesPerPixel;
837 p_bitmap->p_data = calloc( i_height, p_bitmap->i_bytesPerRow );
839 #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_4
840 *pp_colorSpace = CGColorSpaceCreateWithName( kCGColorSpaceGenericRGB );
842 *pp_colorSpace = CreateGenericRGBColorSpace();
845 if( p_bitmap->p_data && *pp_colorSpace )
847 p_context = CGBitmapContextCreate( p_bitmap->p_data, i_width, i_height,
848 p_bitmap->i_bitsPerChannel, p_bitmap->i_bytesPerRow,
849 *pp_colorSpace, kCGImageAlphaPremultipliedFirst);
853 #if MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_1
854 // OS X 10.1 doesn't support weak linking of this call which is only available
855 // int 10.4 and later
856 if( CGContextSetAllowsAntialiasing != NULL )
858 CGContextSetAllowsAntialiasing( p_context, true );
862 *pp_memory = p_bitmap;
868 static offscreen_bitmap_t *Compose( int i_text_align, UniChar *psz_utf16_str, uint32_t i_text_len,
869 uint32_t i_runs, uint32_t *pi_run_lengths, ATSUStyle *pp_styles,
870 int i_width, int i_height, int *pi_textblock_height )
872 offscreen_bitmap_t *p_offScreen = NULL;
873 CGColorSpaceRef p_colorSpace = NULL;
874 CGContextRef p_context = NULL;
876 p_context = CreateOffScreenContext( i_width, i_height, &p_offScreen, &p_colorSpace );
880 ATSUTextLayout p_textLayout;
881 OSStatus status = noErr;
883 status = ATSUCreateTextLayoutWithTextPtr( psz_utf16_str, 0, i_text_len, i_text_len,
885 (const UniCharCount *) pi_run_lengths,
888 if( status == noErr )
890 // Attach our offscreen Image Graphics Context to the text style
891 // and setup the line alignment (have to specify the line width
892 // also in order for our chosen alignment to work)
894 Fract alignment = kATSUStartAlignment;
895 Fixed line_width = Long2Fix( i_width - HORIZONTAL_MARGIN * 2 );
897 ATSUAttributeTag tags[] = { kATSUCGContextTag, kATSULineFlushFactorTag, kATSULineWidthTag };
898 ByteCount sizes[] = { sizeof( CGContextRef ), sizeof( Fract ), sizeof( Fixed ) };
899 ATSUAttributeValuePtr values[] = { &p_context, &alignment, &line_width };
901 int i_tag_cnt = sizeof( tags ) / sizeof( ATSUAttributeTag );
903 if( i_text_align == SUBPICTURE_ALIGN_RIGHT )
905 alignment = kATSUEndAlignment;
907 else if( i_text_align != SUBPICTURE_ALIGN_LEFT )
909 alignment = kATSUCenterAlignment;
912 ATSUSetLayoutControls( p_textLayout, i_tag_cnt, tags, sizes, values );
914 // let ATSUI deal with characters not-in-our-specified-font
915 ATSUSetTransientFontMatching( p_textLayout, true );
917 Fixed x = Long2Fix( HORIZONTAL_MARGIN );
918 Fixed y = Long2Fix( i_height );
920 // Set the line-breaks and draw individual lines
921 uint32_t i_start = 0;
922 uint32_t i_end = i_text_len;
924 // Set up black outlining of the text --
925 CGContextSetRGBStrokeColor( p_context, 0, 0, 0, 0.5 );
926 CGContextSetTextDrawingMode( p_context, kCGTextFillStroke );
930 // ATSUBreakLine will automatically pick up any manual '\n's also
931 status = ATSUBreakLine( p_textLayout, i_start, line_width, true, (UniCharArrayOffset *) &i_end );
932 if( ( status == noErr ) || ( status == kATSULineBreakInWord ) )
936 uint32_t i_actualSize;
938 // Come down far enough to fit the height of this line --
939 ATSUGetLineControl( p_textLayout, i_start, kATSULineAscentTag,
940 sizeof( Fixed ), &ascent, (ByteCount *) &i_actualSize );
942 // Quartz uses an upside-down co-ordinate space -> y values decrease as
943 // you move down the page
946 // Set the outlining for this line to be dependant on the size of the line -
947 // make it about 5% of the ascent, with a minimum at 1.0
948 float f_thickness = FixedToFloat( ascent ) * 0.05;
949 CGContextSetLineWidth( p_context, (( f_thickness > 1.0 ) ? 1.0 : f_thickness ));
951 ATSUDrawText( p_textLayout, i_start, i_end - i_start, x, y );
953 // and now prepare for the next line by coming down far enough for our
955 ATSUGetLineControl( p_textLayout, i_start, kATSULineDescentTag,
956 sizeof( Fixed ), &descent, (ByteCount *) &i_actualSize );
964 while( i_end < i_text_len );
966 *pi_textblock_height = i_height - Fix2Long( y );
967 CGContextFlush( p_context );
969 ATSUDisposeTextLayout( p_textLayout );
972 CGContextRelease( p_context );
974 if( p_colorSpace ) CGColorSpaceRelease( p_colorSpace );
979 static int RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region, UniChar *psz_utf16_str,
980 uint32_t i_text_len, uint32_t i_runs, uint32_t *pi_run_lengths, ATSUStyle *pp_styles )
982 offscreen_bitmap_t *p_offScreen = NULL;
983 int i_textblock_height = 0;
985 int i_width = p_filter->fmt_out.video.i_visible_width;
986 int i_height = p_filter->fmt_out.video.i_visible_height;
987 int i_text_align = p_region->i_align & 0x3;
991 msg_Err( p_filter, "Invalid argument to RenderYUVA" );
995 p_offScreen = Compose( i_text_align, psz_utf16_str, i_text_len,
996 i_runs, pi_run_lengths, pp_styles,
997 i_width, i_height, &i_textblock_height );
1001 msg_Err( p_filter, "No offscreen buffer" );
1002 return VLC_EGENERIC;
1005 uint8_t *p_dst_y,*p_dst_u,*p_dst_v,*p_dst_a;
1007 int x, y, i_offset, i_pitch;
1008 uint8_t i_y, i_u, i_v; // YUV values, derived from incoming RGB
1009 subpicture_region_t *p_region_tmp;
1011 // Create a new subpicture region
1012 memset( &fmt, 0, sizeof(video_format_t) );
1013 fmt.i_chroma = VLC_FOURCC('Y','U','V','A');
1015 fmt.i_width = fmt.i_visible_width = i_width;
1016 fmt.i_height = fmt.i_visible_height = i_textblock_height + VERTICAL_MARGIN * 2;
1017 fmt.i_x_offset = fmt.i_y_offset = 0;
1018 p_region_tmp = spu_CreateRegion( p_filter, &fmt );
1021 msg_Err( p_filter, "cannot allocate SPU region" );
1022 return VLC_EGENERIC;
1024 p_region->fmt = p_region_tmp->fmt;
1025 p_region->picture = p_region_tmp->picture;
1026 free( p_region_tmp );
1028 p_dst_y = p_region->picture.Y_PIXELS;
1029 p_dst_u = p_region->picture.U_PIXELS;
1030 p_dst_v = p_region->picture.V_PIXELS;
1031 p_dst_a = p_region->picture.A_PIXELS;
1032 i_pitch = p_region->picture.A_PITCH;
1034 i_offset = VERTICAL_MARGIN *i_pitch;
1035 for( y=0; y<i_textblock_height; y++)
1037 for( x=0; x<i_width; x++)
1039 int i_alpha = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel ];
1040 int i_red = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 1 ];
1041 int i_green = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 2 ];
1042 int i_blue = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 3 ];
1044 i_y = (uint8_t)__MIN(abs( 2104 * i_red + 4130 * i_green +
1045 802 * i_blue + 4096 + 131072 ) >> 13, 235);
1046 i_u = (uint8_t)__MIN(abs( -1214 * i_red + -2384 * i_green +
1047 3598 * i_blue + 4096 + 1048576) >> 13, 240);
1048 i_v = (uint8_t)__MIN(abs( 3598 * i_red + -3013 * i_green +
1049 -585 * i_blue + 4096 + 1048576) >> 13, 240);
1051 p_dst_y[ i_offset + x ] = i_y;
1052 p_dst_u[ i_offset + x ] = i_u;
1053 p_dst_v[ i_offset + x ] = i_v;
1054 p_dst_a[ i_offset + x ] = i_alpha;
1056 i_offset += i_pitch;
1059 free( p_offScreen->p_data );
1060 free( p_offScreen );