quartztext.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:33k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * quartztext.c : Put text on the video, using Mac OS X Quartz Engine
- *****************************************************************************
- * Copyright (C) 2007, 2009 the VideoLAN team
- * $Id: 9f731382ac40010541e73de19c3892af8ae070d5 $
- *
- * Authors: Bernie Purcell <bitmap@videolan.org>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifdef __x86_64__
- #warning "No text renderer build! Quartztext isn't 64bit compatible!"
- #warning "RE-WRITE ME!"
- #else
- //////////////////////////////////////////////////////////////////////////////
- // Preamble
- //////////////////////////////////////////////////////////////////////////////
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_vout.h>
- #include <vlc_osd.h>
- #include <vlc_block.h>
- #include <vlc_filter.h>
- #include <vlc_stream.h>
- #include <vlc_xml.h>
- #include <vlc_input.h>
- #include <vlc_strings.h>
- #include <math.h>
- #include <Carbon/Carbon.h>
- #define DEFAULT_FONT "Arial Black"
- #define DEFAULT_FONT_COLOR 0xffffff
- #define DEFAULT_REL_FONT_SIZE 16
- #define VERTICAL_MARGIN 3
- #define HORIZONTAL_MARGIN 10
- //////////////////////////////////////////////////////////////////////////////
- // Local prototypes
- //////////////////////////////////////////////////////////////////////////////
- static int Create ( vlc_object_t * );
- static void Destroy( vlc_object_t * );
- static int LoadFontsFromAttachments( filter_t *p_filter );
- static int RenderText( filter_t *, subpicture_region_t *,
- subpicture_region_t * );
- static int RenderHtml( filter_t *, subpicture_region_t *,
- subpicture_region_t * );
- static int GetFontSize( filter_t *p_filter );
- static int RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region,
- UniChar *psz_utfString, uint32_t i_text_len,
- uint32_t i_runs, uint32_t *pi_run_lengths,
- ATSUStyle *pp_styles );
- static ATSUStyle CreateStyle( char *psz_fontname, int i_font_size,
- uint32_t i_font_color,
- bool b_bold, bool b_italic,
- bool b_uline );
- //////////////////////////////////////////////////////////////////////////////
- // Module descriptor
- //////////////////////////////////////////////////////////////////////////////
- // The preferred way to set font style information is for it to come from the
- // subtitle file, and for it to be rendered with RenderHtml instead of
- // RenderText. This module, unlike Freetype, doesn't provide any options to
- // override the fallback font selection used when this style information is
- // absent.
- #define FONT_TEXT N_("Font")
- #define FONT_LONGTEXT N_("Name for the font you want to use")
- #define FONTSIZER_TEXT N_("Relative font size")
- #define FONTSIZER_LONGTEXT N_("This is the relative default size of the "
- "fonts that will be rendered on the video. If absolute font size is set, "
- "relative size will be overriden." )
- #define COLOR_TEXT N_("Text default color")
- #define COLOR_LONGTEXT N_("The color of the text that will be rendered on "
- "the video. This must be an hexadecimal (like HTML colors). The first two "
- "chars are for red, then green, then blue. #000000 = black, #FF0000 = red,"
- " #00FF00 = green, #FFFF00 = yellow (red + green), #FFFFFF = white" )
- static const int pi_color_values[] = {
- 0x00000000, 0x00808080, 0x00C0C0C0, 0x00FFFFFF, 0x00800000,
- 0x00FF0000, 0x00FF00FF, 0x00FFFF00, 0x00808000, 0x00008000, 0x00008080,
- 0x0000FF00, 0x00800080, 0x00000080, 0x000000FF, 0x0000FFFF };
- static const char *const ppsz_color_descriptions[] = {
- N_("Black"), N_("Gray"), N_("Silver"), N_("White"), N_("Maroon"),
- N_("Red"), N_("Fuchsia"), N_("Yellow"), N_("Olive"), N_("Green"), N_("Teal"),
- N_("Lime"), N_("Purple"), N_("Navy"), N_("Blue"), N_("Aqua") };
- static const int pi_sizes[] = { 20, 18, 16, 12, 6 };
- static const char *const ppsz_sizes_text[] = {
- N_("Smaller"), N_("Small"), N_("Normal"), N_("Large"), N_("Larger") };
- vlc_module_begin ()
- set_shortname( N_("Mac Text renderer"))
- set_description( N_("Quartz font renderer") )
- set_category( CAT_VIDEO )
- set_subcategory( SUBCAT_VIDEO_SUBPIC )
- add_string( "quartztext-font", DEFAULT_FONT, NULL, FONT_TEXT, FONT_LONGTEXT,
- false )
- add_integer( "quartztext-rel-fontsize", DEFAULT_REL_FONT_SIZE, NULL, FONTSIZER_TEXT,
- FONTSIZER_LONGTEXT, false )
- change_integer_list( pi_sizes, ppsz_sizes_text, NULL );
- add_integer( "quartztext-color", 0x00FFFFFF, NULL, COLOR_TEXT,
- COLOR_LONGTEXT, false )
- change_integer_list( pi_color_values, ppsz_color_descriptions, NULL );
- set_capability( "text renderer", 150 )
- add_shortcut( "text" )
- set_callbacks( Create, Destroy )
- vlc_module_end ()
- typedef struct offscreen_bitmap_t offscreen_bitmap_t;
- struct offscreen_bitmap_t
- {
- uint8_t *p_data;
- int i_bitsPerChannel;
- int i_bitsPerPixel;
- int i_bytesPerPixel;
- int i_bytesPerRow;
- };
- //////////////////////////////////////////////////////////////////////////////
- // filter_sys_t: quartztext local data
- //////////////////////////////////////////////////////////////////////////////
- // This structure is part of the video output thread descriptor.
- // It describes the freetype specific properties of an output thread.
- //////////////////////////////////////////////////////////////////////////////
- struct filter_sys_t
- {
- char *psz_font_name;
- uint8_t i_font_opacity;
- int i_font_color;
- int i_font_size;
- ATSFontContainerRef *p_fonts;
- int i_fonts;
- };
- #define UCHAR UniChar
- #define TR_DEFAULT_FONT p_sys->psz_font_name
- #define TR_FONT_STYLE_PTR ATSUStyle
- #include "text_renderer.h"
- //////////////////////////////////////////////////////////////////////////////
- // Create: allocates osd-text video thread output method
- //////////////////////////////////////////////////////////////////////////////
- // This function allocates and initializes a Clone vout method.
- //////////////////////////////////////////////////////////////////////////////
- static int Create( vlc_object_t *p_this )
- {
- filter_t *p_filter = (filter_t *)p_this;
- filter_sys_t *p_sys;
- // Allocate structure
- p_filter->p_sys = p_sys = malloc( sizeof( filter_sys_t ) );
- if( !p_sys )
- return VLC_ENOMEM;
- p_sys->psz_font_name = var_CreateGetString( p_this, "quartztext-font" );
- p_sys->i_font_opacity = 255;
- p_sys->i_font_color = __MAX( __MIN( var_CreateGetInteger( p_this, "quartztext-color" ) , 0xFFFFFF ), 0 );
- p_sys->i_font_size = GetFontSize( p_filter );
- p_filter->pf_render_text = RenderText;
- p_filter->pf_render_html = RenderHtml;
- p_sys->p_fonts = NULL;
- p_sys->i_fonts = 0;
- LoadFontsFromAttachments( p_filter );
- return VLC_SUCCESS;
- }
- //////////////////////////////////////////////////////////////////////////////
- // Destroy: destroy Clone video thread output method
- //////////////////////////////////////////////////////////////////////////////
- // Clean up all data and library connections
- //////////////////////////////////////////////////////////////////////////////
- static void Destroy( vlc_object_t *p_this )
- {
- filter_t *p_filter = (filter_t *)p_this;
- filter_sys_t *p_sys = p_filter->p_sys;
- if( p_sys->p_fonts )
- {
- int k;
- for( k = 0; k < p_sys->i_fonts; k++ )
- {
- ATSFontDeactivate( p_sys->p_fonts[k], NULL, kATSOptionFlagsDefault );
- }
- free( p_sys->p_fonts );
- }
- free( p_sys->psz_font_name );
- free( p_sys );
- }
- //////////////////////////////////////////////////////////////////////////////
- // Make any TTF/OTF fonts present in the attachments of the media file
- // available to the Quartz engine for text rendering
- //////////////////////////////////////////////////////////////////////////////
- static int LoadFontsFromAttachments( filter_t *p_filter )
- {
- filter_sys_t *p_sys = p_filter->p_sys;
- input_thread_t *p_input;
- input_attachment_t **pp_attachments;
- int i_attachments_cnt;
- int k;
- int rv = VLC_SUCCESS;
- p_input = (input_thread_t *)vlc_object_find( p_filter, VLC_OBJECT_INPUT, FIND_PARENT );
- if( ! p_input )
- return VLC_EGENERIC;
- if( VLC_SUCCESS != input_Control( p_input, INPUT_GET_ATTACHMENTS, &pp_attachments, &i_attachments_cnt ))
- {
- vlc_object_release(p_input);
- return VLC_EGENERIC;
- }
- p_sys->i_fonts = 0;
- p_sys->p_fonts = malloc( i_attachments_cnt * sizeof( ATSFontContainerRef ) );
- if(! p_sys->p_fonts )
- rv = VLC_ENOMEM;
- for( k = 0; k < i_attachments_cnt; k++ )
- {
- input_attachment_t *p_attach = pp_attachments[k];
- if( p_sys->p_fonts )
- {
- if(( !strcmp( p_attach->psz_mime, "application/x-truetype-font" ) || // TTF
- !strcmp( p_attach->psz_mime, "application/x-font-otf" ) ) && // OTF
- ( p_attach->i_data > 0 ) &&
- ( p_attach->p_data != NULL ) )
- {
- ATSFontContainerRef container;
- if( noErr == ATSFontActivateFromMemory( p_attach->p_data,
- p_attach->i_data,
- kATSFontContextLocal,
- kATSFontFormatUnspecified,
- NULL,
- kATSOptionFlagsDefault,
- &container ))
- {
- p_sys->p_fonts[ p_sys->i_fonts++ ] = container;
- }
- }
- }
- vlc_input_attachment_Delete( p_attach );
- }
- free( pp_attachments );
- vlc_object_release(p_input);
- return rv;
- }
- #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4
- // Original version of these functions available on:
- // http://developer.apple.com/documentation/Carbon/Conceptual/QuickDrawToQuartz2D/tq_color/chapter_4_section_3.html
- #define kGenericRGBProfilePathStr "/System/Library/ColorSync/Profiles/Generic RGB Profile.icc"
- static CMProfileRef OpenGenericProfile( void )
- {
- static CMProfileRef cached_rgb_prof = NULL;
- // Create the profile reference only once
- if( cached_rgb_prof == NULL )
- {
- OSStatus err;
- CMProfileLocation loc;
- loc.locType = cmPathBasedProfile;
- strcpy( loc.u.pathLoc.path, kGenericRGBProfilePathStr );
- err = CMOpenProfile( &cached_rgb_prof, &loc );
- if( err != noErr )
- {
- cached_rgb_prof = NULL;
- }
- }
- if( cached_rgb_prof )
- {
- // Clone the profile reference so that the caller has
- // their own reference, not our cached one.
- CMCloneProfileRef( cached_rgb_prof );
- }
- return cached_rgb_prof;
- }
- static CGColorSpaceRef CreateGenericRGBColorSpace( void )
- {
- static CGColorSpaceRef p_generic_rgb_cs = NULL;
- if( p_generic_rgb_cs == NULL )
- {
- CMProfileRef generic_rgb_prof = OpenGenericProfile();
- if( generic_rgb_prof )
- {
- p_generic_rgb_cs = CGColorSpaceCreateWithPlatformColorSpace( generic_rgb_prof );
- CMCloseProfile( generic_rgb_prof );
- }
- }
- return p_generic_rgb_cs;
- }
- #endif
- static char *EliminateCRLF( char *psz_string )
- {
- char *p;
- char *q;
- for( p = psz_string; p && *p; p++ )
- {
- if( ( *p == 'r' ) && ( *(p+1) == 'n' ) )
- {
- for( q = p + 1; *q; q++ )
- *( q - 1 ) = *q;
- *( q - 1 ) = ' ';
- }
- }
- return psz_string;
- }
- // Convert UTF-8 string to UTF-16 character array -- internal Mac Endian-ness ;
- // we don't need to worry about bidirectional text conversion as ATSUI should
- // handle that for us automatically
- static void ConvertToUTF16( const char *psz_utf8_str, uint32_t *pi_strlen, UniChar **ppsz_utf16_str )
- {
- CFStringRef p_cfString;
- int i_string_length;
- p_cfString = CFStringCreateWithCString( NULL, psz_utf8_str, kCFStringEncodingUTF8 );
- if( !p_cfString )
- return;
- i_string_length = CFStringGetLength( p_cfString );
- if( pi_strlen )
- *pi_strlen = i_string_length;
- if( !*ppsz_utf16_str )
- *ppsz_utf16_str = (UniChar *) calloc( i_string_length, sizeof( UniChar ) );
- CFStringGetCharacters( p_cfString, CFRangeMake( 0, i_string_length ), *ppsz_utf16_str );
- CFRelease( p_cfString );
- }
- // Renders a text subpicture region into another one.
- // It is used as pf_add_string callback in the vout method by this module
- static int RenderText( filter_t *p_filter, subpicture_region_t *p_region_out,
- subpicture_region_t *p_region_in )
- {
- filter_sys_t *p_sys = p_filter->p_sys;
- UniChar *psz_utf16_str = NULL;
- uint32_t i_string_length;
- char *psz_string;
- int i_font_color, i_font_alpha, i_font_size;
- vlc_value_t val;
- int i_scale = 1000;
- p_sys->i_font_size = GetFontSize( p_filter );
- // Sanity check
- if( !p_region_in || !p_region_out ) return VLC_EGENERIC;
- psz_string = p_region_in->psz_text;
- if( !psz_string || !*psz_string ) return VLC_EGENERIC;
- if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
- i_scale = val.i_int;
- if( p_region_in->p_style )
- {
- i_font_color = __MAX( __MIN( p_region_in->p_style->i_font_color, 0xFFFFFF ), 0 );
- i_font_alpha = __MAX( __MIN( p_region_in->p_style->i_font_alpha, 255 ), 0 );
- i_font_size = __MAX( __MIN( p_region_in->p_style->i_font_size, 255 ), 0 ) * i_scale / 1000;
- }
- else
- {
- i_font_color = p_sys->i_font_color;
- i_font_alpha = 255 - p_sys->i_font_opacity;
- i_font_size = p_sys->i_font_size;
- }
- if( !i_font_alpha ) i_font_alpha = 255 - p_sys->i_font_opacity;
- if( i_font_size <= 0 )
- {
- msg_Warn( p_filter, "invalid fontsize, using 12" );
- if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
- i_font_size = 12 * val.i_int / 1000;
- else
- i_font_size = 12;
- }
- ConvertToUTF16( EliminateCRLF( psz_string ), &i_string_length, &psz_utf16_str );
- p_region_out->i_x = p_region_in->i_x;
- p_region_out->i_y = p_region_in->i_y;
- if( psz_utf16_str != NULL )
- {
- ATSUStyle p_style = CreateStyle( p_sys->psz_font_name, i_font_size,
- (i_font_color & 0xffffff) |
- ((i_font_alpha & 0xff) << 24),
- false, false, false );
- if( p_style )
- {
- RenderYUVA( p_filter, p_region_out, psz_utf16_str, i_string_length,
- 1, &i_string_length, &p_style );
- }
- ATSUDisposeStyle( p_style );
- free( psz_utf16_str );
- }
- return VLC_SUCCESS;
- }
- static ATSUStyle CreateStyle( char *psz_fontname, int i_font_size, uint32_t i_font_color,
- bool b_bold, bool b_italic, bool b_uline )
- {
- ATSUStyle p_style;
- OSStatus status;
- uint32_t i_tag_cnt;
- float f_red = (float)(( i_font_color & 0x00FF0000 ) >> 16) / 255.0;
- float f_green = (float)(( i_font_color & 0x0000FF00 ) >> 8) / 255.0;
- float f_blue = (float)( i_font_color & 0x000000FF ) / 255.0;
- float f_alpha = ( 255.0 - (float)(( i_font_color & 0xFF000000 ) >> 24)) / 255.0;
- ATSUFontID font;
- Fixed font_size = IntToFixed( i_font_size );
- ATSURGBAlphaColor font_color = { f_red, f_green, f_blue, f_alpha };
- Boolean bold = b_bold;
- Boolean italic = b_italic;
- Boolean uline = b_uline;
- ATSUAttributeTag tags[] = { kATSUSizeTag, kATSURGBAlphaColorTag, kATSUQDItalicTag,
- kATSUQDBoldfaceTag, kATSUQDUnderlineTag, kATSUFontTag };
- ByteCount sizes[] = { sizeof( Fixed ), sizeof( ATSURGBAlphaColor ), sizeof( Boolean ),
- sizeof( Boolean ), sizeof( Boolean ), sizeof( ATSUFontID )};
- ATSUAttributeValuePtr values[] = { &font_size, &font_color, &italic, &bold, &uline, &font };
- i_tag_cnt = sizeof( tags ) / sizeof( ATSUAttributeTag );
- status = ATSUFindFontFromName( psz_fontname,
- strlen( psz_fontname ),
- kFontFullName,
- kFontNoPlatform,
- kFontNoScript,
- kFontNoLanguageCode,
- &font );
- if( status != noErr )
- {
- // If we can't find a suitable font, just do everything else
- i_tag_cnt--;
- }
- if( noErr == ATSUCreateStyle( &p_style ) )
- {
- if( noErr == ATSUSetAttributes( p_style, i_tag_cnt, tags, sizes, values ) )
- {
- return p_style;
- }
- ATSUDisposeStyle( p_style );
- }
- return NULL;
- }
- static ATSUStyle GetStyleFromFontStack( filter_sys_t *p_sys,
- font_stack_t **p_fonts, bool b_bold, bool b_italic,
- bool b_uline )
- {
- ATSUStyle p_style = NULL;
- char *psz_fontname = NULL;
- uint32_t i_font_color = p_sys->i_font_color;
- uint32_t i_karaoke_bg_color = i_font_color; /* Use it */
- int i_font_size = p_sys->i_font_size;
- if( VLC_SUCCESS == PeekFont( p_fonts, &psz_fontname, &i_font_size,
- &i_font_color, &i_karaoke_bg_color ))
- {
- p_style = CreateStyle( psz_fontname, i_font_size, i_font_color,
- b_bold, b_italic, b_uline );
- }
- return p_style;
- }
- static void SetupLine( filter_t *p_filter, const char *psz_text_in,
- UniChar **psz_text_out, uint32_t *pi_runs,
- uint32_t **ppi_run_lengths, ATSUStyle **ppp_styles,
- ATSUStyle p_style )
- {
- uint32_t i_string_length = 0;
- ConvertToUTF16( psz_text_in, &i_string_length, psz_text_out );
- *psz_text_out += i_string_length;
- if( ppp_styles && ppi_run_lengths )
- {
- (*pi_runs)++;
- if( *ppp_styles )
- *ppp_styles = (ATSUStyle *) realloc( *ppp_styles, *pi_runs * sizeof( ATSUStyle ) );
- else
- *ppp_styles = (ATSUStyle *) malloc( *pi_runs * sizeof( ATSUStyle ) );
- (*ppp_styles)[ *pi_runs - 1 ] = p_style;
- if( *ppi_run_lengths )
- *ppi_run_lengths = (uint32_t *) realloc( *ppi_run_lengths, *pi_runs * sizeof( uint32_t ) );
- else
- *ppi_run_lengths = (uint32_t *) malloc( *pi_runs * sizeof( uint32_t ) );
- (*ppi_run_lengths)[ *pi_runs - 1 ] = i_string_length;
- }
- }
- static int RenderHtml( filter_t *p_filter, subpicture_region_t *p_region_out,
- subpicture_region_t *p_region_in )
- {
- int rv = VLC_SUCCESS;
- stream_t *p_sub = NULL;
- xml_t *p_xml = NULL;
- xml_reader_t *p_xml_reader = NULL;
- if( !p_region_in || !p_region_in->psz_html )
- return VLC_EGENERIC;
- /* Reset the default fontsize in case screen metrics have changed */
- p_filter->p_sys->i_font_size = GetFontSize( p_filter );
- p_sub = stream_MemoryNew( VLC_OBJECT(p_filter),
- (uint8_t *) p_region_in->psz_html,
- strlen( p_region_in->psz_html ),
- true );
- if( p_sub )
- {
- p_xml = xml_Create( p_filter );
- if( p_xml )
- {
- bool b_karaoke = false;
- p_xml_reader = xml_ReaderCreate( p_xml, p_sub );
- if( p_xml_reader )
- {
- /* Look for Root Node */
- if( xml_ReaderRead( p_xml_reader ) == 1 )
- {
- char *psz_node = xml_ReaderName( p_xml_reader );
- if( !strcasecmp( "karaoke", psz_node ) )
- {
- /* We're going to have to render the text a number
- * of times to show the progress marker on the text.
- */
- var_SetBool( p_filter, "text-rerender", true );
- b_karaoke = true;
- }
- else if( !strcasecmp( "text", psz_node ) )
- {
- b_karaoke = false;
- }
- else
- {
- /* Only text and karaoke tags are supported */
- xml_ReaderDelete( p_xml, p_xml_reader );
- p_xml_reader = NULL;
- rv = VLC_EGENERIC;
- }
- free( psz_node );
- }
- }
- if( p_xml_reader )
- {
- UniChar *psz_text;
- int i_len = 0;
- uint32_t i_runs = 0;
- uint32_t i_k_runs = 0;
- uint32_t *pi_run_lengths = NULL;
- uint32_t *pi_k_run_lengths = NULL;
- uint32_t *pi_k_durations = NULL;
- ATSUStyle *pp_styles = NULL;
- psz_text = (UniChar *) malloc( strlen( p_region_in->psz_html ) *
- sizeof( UniChar ) );
- if( psz_text )
- {
- uint32_t k;
- rv = ProcessNodes( p_filter, p_xml_reader,
- p_region_in->p_style, psz_text, &i_len,
- &i_runs, &pi_run_lengths, &pp_styles,
- /* No karaoke support */
- false, &i_k_runs, &pi_k_run_lengths, &pi_k_durations );
- assert( pi_k_run_lengths == NULL && pi_k_durations == NULL );
- p_region_out->i_x = p_region_in->i_x;
- p_region_out->i_y = p_region_in->i_y;
- if(( rv == VLC_SUCCESS ) && ( i_len > 0 ))
- {
- RenderYUVA( p_filter, p_region_out, psz_text, i_len, i_runs,
- pi_run_lengths, pp_styles);
- }
- for( k=0; k<i_runs; k++)
- ATSUDisposeStyle( pp_styles[k] );
- free( pp_styles );
- free( pi_run_lengths );
- free( psz_text );
- }
- xml_ReaderDelete( p_xml, p_xml_reader );
- }
- xml_Delete( p_xml );
- }
- stream_Delete( p_sub );
- }
- return rv;
- }
- static CGContextRef CreateOffScreenContext( int i_width, int i_height,
- offscreen_bitmap_t **pp_memory, CGColorSpaceRef *pp_colorSpace )
- {
- offscreen_bitmap_t *p_bitmap;
- CGContextRef p_context = NULL;
- p_bitmap = (offscreen_bitmap_t *) malloc( sizeof( offscreen_bitmap_t ));
- if( p_bitmap )
- {
- p_bitmap->i_bitsPerChannel = 8;
- p_bitmap->i_bitsPerPixel = 4 * p_bitmap->i_bitsPerChannel; // A,R,G,B
- p_bitmap->i_bytesPerPixel = p_bitmap->i_bitsPerPixel / 8;
- p_bitmap->i_bytesPerRow = i_width * p_bitmap->i_bytesPerPixel;
- p_bitmap->p_data = calloc( i_height, p_bitmap->i_bytesPerRow );
- *pp_colorSpace = CGColorSpaceCreateWithName( kCGColorSpaceGenericRGB );
- if( p_bitmap->p_data && *pp_colorSpace )
- {
- p_context = CGBitmapContextCreate( p_bitmap->p_data, i_width, i_height,
- p_bitmap->i_bitsPerChannel, p_bitmap->i_bytesPerRow,
- *pp_colorSpace, kCGImageAlphaPremultipliedFirst);
- }
- if( p_context )
- {
- if( CGContextSetAllowsAntialiasing != NULL )
- {
- CGContextSetAllowsAntialiasing( p_context, true );
- }
- }
- *pp_memory = p_bitmap;
- }
- return p_context;
- }
- static offscreen_bitmap_t *Compose( int i_text_align, UniChar *psz_utf16_str, uint32_t i_text_len,
- uint32_t i_runs, uint32_t *pi_run_lengths, ATSUStyle *pp_styles,
- int i_width, int i_height, int *pi_textblock_height )
- {
- offscreen_bitmap_t *p_offScreen = NULL;
- CGColorSpaceRef p_colorSpace = NULL;
- CGContextRef p_context = NULL;
- p_context = CreateOffScreenContext( i_width, i_height, &p_offScreen, &p_colorSpace );
- if( p_context )
- {
- ATSUTextLayout p_textLayout;
- OSStatus status = noErr;
- status = ATSUCreateTextLayoutWithTextPtr( psz_utf16_str, 0, i_text_len, i_text_len,
- i_runs,
- (const UniCharCount *) pi_run_lengths,
- pp_styles,
- &p_textLayout );
- if( status == noErr )
- {
- // Attach our offscreen Image Graphics Context to the text style
- // and setup the line alignment (have to specify the line width
- // also in order for our chosen alignment to work)
- Fract alignment = kATSUStartAlignment;
- Fixed line_width = Long2Fix( i_width - HORIZONTAL_MARGIN * 2 );
- ATSUAttributeTag tags[] = { kATSUCGContextTag, kATSULineFlushFactorTag, kATSULineWidthTag };
- ByteCount sizes[] = { sizeof( CGContextRef ), sizeof( Fract ), sizeof( Fixed ) };
- ATSUAttributeValuePtr values[] = { &p_context, &alignment, &line_width };
- int i_tag_cnt = sizeof( tags ) / sizeof( ATSUAttributeTag );
- if( i_text_align == SUBPICTURE_ALIGN_RIGHT )
- {
- alignment = kATSUEndAlignment;
- }
- else if( i_text_align != SUBPICTURE_ALIGN_LEFT )
- {
- alignment = kATSUCenterAlignment;
- }
- ATSUSetLayoutControls( p_textLayout, i_tag_cnt, tags, sizes, values );
- // let ATSUI deal with characters not-in-our-specified-font
- ATSUSetTransientFontMatching( p_textLayout, true );
- Fixed x = Long2Fix( HORIZONTAL_MARGIN );
- Fixed y = Long2Fix( i_height );
- // Set the line-breaks and draw individual lines
- uint32_t i_start = 0;
- uint32_t i_end = i_text_len;
- // Set up black outlining of the text --
- CGContextSetRGBStrokeColor( p_context, 0, 0, 0, 0.5 );
- CGContextSetTextDrawingMode( p_context, kCGTextFillStroke );
- CGContextSetShadow( p_context, CGSizeMake( 0, 0 ), 5 );
- float black_components[4] = {0, 0, 0, 1};
- CGColorRef outlinecolor = CGColorCreate( CGColorSpaceCreateWithName( kCGColorSpaceGenericRGB ), black_components );
- CGContextSetShadowWithColor (p_context, CGSizeMake( 0, 0 ), 5, outlinecolor);
- CGColorRelease( outlinecolor );
- do
- {
- // ATSUBreakLine will automatically pick up any manual 'n's also
- status = ATSUBreakLine( p_textLayout, i_start, line_width, true, (UniCharArrayOffset *) &i_end );
- if( ( status == noErr ) || ( status == kATSULineBreakInWord ) )
- {
- Fixed ascent;
- Fixed descent;
- uint32_t i_actualSize;
- // Come down far enough to fit the height of this line --
- ATSUGetLineControl( p_textLayout, i_start, kATSULineAscentTag,
- sizeof( Fixed ), &ascent, (ByteCount *) &i_actualSize );
- // Quartz uses an upside-down co-ordinate space -> y values decrease as
- // you move down the page
- y -= ascent;
- // Set the outlining for this line to be dependent on the size of the line -
- // make it about 5% of the ascent, with a minimum at 1.0
- float f_thickness = FixedToFloat( ascent ) * 0.05;
- CGContextSetLineWidth( p_context, (( f_thickness < 1.0 ) ? 1.0 : f_thickness ));
- ATSUDrawText( p_textLayout, i_start, i_end - i_start, x, y );
- // and now prepare for the next line by coming down far enough for our
- // descent
- ATSUGetLineControl( p_textLayout, i_start, kATSULineDescentTag,
- sizeof( Fixed ), &descent, (ByteCount *) &i_actualSize );
- y -= descent;
- i_start = i_end;
- }
- else
- break;
- }
- while( i_end < i_text_len );
- *pi_textblock_height = i_height - Fix2Long( y );
- CGContextFlush( p_context );
- ATSUDisposeTextLayout( p_textLayout );
- }
- CGContextRelease( p_context );
- }
- if( p_colorSpace ) CGColorSpaceRelease( p_colorSpace );
- return p_offScreen;
- }
- static int GetFontSize( filter_t *p_filter )
- {
- return p_filter->fmt_out.video.i_height / __MAX(1, var_CreateGetInteger( p_filter, "quartztext-rel-fontsize" ));
- }
- static int RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region, UniChar *psz_utf16_str,
- uint32_t i_text_len, uint32_t i_runs, uint32_t *pi_run_lengths, ATSUStyle *pp_styles )
- {
- offscreen_bitmap_t *p_offScreen = NULL;
- int i_textblock_height = 0;
- int i_width = p_filter->fmt_out.video.i_visible_width;
- int i_height = p_filter->fmt_out.video.i_visible_height;
- int i_text_align = p_region->i_align & 0x3;
- if( !psz_utf16_str )
- {
- msg_Err( p_filter, "Invalid argument to RenderYUVA" );
- return VLC_EGENERIC;
- }
- p_offScreen = Compose( i_text_align, psz_utf16_str, i_text_len,
- i_runs, pi_run_lengths, pp_styles,
- i_width, i_height, &i_textblock_height );
- if( !p_offScreen )
- {
- msg_Err( p_filter, "No offscreen buffer" );
- return VLC_EGENERIC;
- }
- uint8_t *p_dst_y,*p_dst_u,*p_dst_v,*p_dst_a;
- video_format_t fmt;
- int x, y, i_offset, i_pitch;
- uint8_t i_y, i_u, i_v; // YUV values, derived from incoming RGB
- // Create a new subpicture region
- memset( &fmt, 0, sizeof(video_format_t) );
- fmt.i_chroma = VLC_FOURCC('Y','U','V','A');
- fmt.i_aspect = 0;
- fmt.i_width = fmt.i_visible_width = i_width;
- fmt.i_height = fmt.i_visible_height = __MIN( i_height, i_textblock_height + VERTICAL_MARGIN * 2);
- fmt.i_x_offset = fmt.i_y_offset = 0;
- p_region->p_picture = picture_New( fmt.i_chroma, fmt.i_width, fmt.i_height, fmt.i_aspect );
- if( !p_region->p_picture )
- return VLC_EGENERIC;
- p_region->fmt = fmt;
- p_dst_y = p_region->p_picture->Y_PIXELS;
- p_dst_u = p_region->p_picture->U_PIXELS;
- p_dst_v = p_region->p_picture->V_PIXELS;
- p_dst_a = p_region->p_picture->A_PIXELS;
- i_pitch = p_region->p_picture->A_PITCH;
- i_offset = (i_height+VERTICAL_MARGIN < fmt.i_height) ? VERTICAL_MARGIN *i_pitch : 0 ;
- for( y=0; y<fmt.i_height; y++)
- {
- for( x=0; x<fmt.i_width; x++)
- {
- int i_alpha = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel ];
- int i_red = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 1 ];
- int i_green = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 2 ];
- int i_blue = p_offScreen->p_data[ y * p_offScreen->i_bytesPerRow + x * p_offScreen->i_bytesPerPixel + 3 ];
- i_y = (uint8_t)__MIN(abs( 2104 * i_red + 4130 * i_green +
- 802 * i_blue + 4096 + 131072 ) >> 13, 235);
- i_u = (uint8_t)__MIN(abs( -1214 * i_red + -2384 * i_green +
- 3598 * i_blue + 4096 + 1048576) >> 13, 240);
- i_v = (uint8_t)__MIN(abs( 3598 * i_red + -3013 * i_green +
- -585 * i_blue + 4096 + 1048576) >> 13, 240);
- p_dst_y[ i_offset + x ] = i_y;
- p_dst_u[ i_offset + x ] = i_u;
- p_dst_v[ i_offset + x ] = i_v;
- p_dst_a[ i_offset + x ] = i_alpha;
- }
- i_offset += i_pitch;
- }
- free( p_offScreen->p_data );
- free( p_offScreen );
- return VLC_SUCCESS;
- }
- #endif