2 * producer_pango.c -- a pango-based titler
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include "producer_pango.h"
22 #include <framework/mlt_frame.h>
25 #include <gdk-pixbuf/gdk-pixbuf.h>
26 #include <pango/pangoft2.h>
27 #include <freetype/freetype.h>
30 struct producer_pango_s
32 struct mlt_producer_s parent
;
47 // special color type used by internal pango routines
53 // Forward declarations
54 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
55 static void producer_close( mlt_producer parent
);
56 static void pango_draw_background( GdkPixbuf
*pixbuf
, rgba_color bg
);
57 static GdkPixbuf
*pango_get_pixbuf( const char *markup
, const char *text
, const char *font
,
58 rgba_color fg
, rgba_color bg
, int pad
, int align
, int weight
, int size
);
60 /** Return nonzero if the two strings are equal, ignoring case, up to
61 the first n characters.
63 int strncaseeq(const char *s1
, const char *s2
, size_t n
)
67 if (tolower(*s1
++) != tolower(*s2
++))
73 /** Parse the alignment property.
76 static int alignment_parse( char* align
)
78 int ret
= pango_align_left
;
81 else if ( isdigit( align
[ 0 ] ) )
83 else if ( align
[ 0 ] == 'c' || align
[ 0 ] == 'm' )
84 ret
= pango_align_center
;
85 else if ( align
[ 0 ] == 'r' )
86 ret
= pango_align_right
;
91 static PangoFT2FontMap
*fontmap
= NULL
;
93 mlt_producer
producer_pango_init( const char *filename
)
95 producer_pango
this = calloc( sizeof( struct producer_pango_s
), 1 );
96 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
98 mlt_producer producer
= &this->parent
;
100 // THIS SHOULD BE MUTEXED...
101 if ( fontmap
== NULL
)
102 fontmap
= (PangoFT2FontMap
*) pango_ft2_font_map_new();
104 producer
->get_frame
= producer_get_frame
;
105 producer
->close
= ( mlt_destructor
)producer_close
;
107 // This is required to initialise gdk-pixbuf
110 // Get the properties interface
111 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
113 // Set the default properties
114 mlt_properties_set( properties
, "fgcolour", "0xffffffff" );
115 mlt_properties_set( properties
, "bgcolour", "0x00000000" );
116 mlt_properties_set_int( properties
, "align", pango_align_left
);
117 mlt_properties_set_int( properties
, "pad", 0 );
118 mlt_properties_set( properties
, "text", "" );
119 mlt_properties_set( properties
, "font", "Sans 48" );
120 mlt_properties_set( properties
, "encoding", "UTF-8" );
121 mlt_properties_set_int( properties
, "weight", PANGO_WEIGHT_NORMAL
);
123 if ( filename
== NULL
)
125 mlt_properties_set( properties
, "markup", "" );
127 else if ( filename
[ 0 ] == '+' || strstr( filename
, "/+" ) )
129 char *copy
= strdup( filename
+ 1 );
131 if ( strstr( markup
, "/+" ) )
132 markup
= strstr( markup
, "/+" ) + 2;
133 ( *strrchr( markup
, '.' ) ) = '\0';
134 while ( strchr( markup
, '~' ) )
135 ( *strchr( markup
, '~' ) ) = '\n';
136 mlt_properties_set( properties
, "resource", ( char * )filename
);
137 mlt_properties_set( properties
, "markup", markup
);
142 FILE *f
= fopen( filename
, "r" );
150 while ( fgets( line
, 80, f
) )
152 size
+= strlen( line
) + 1;
155 markup
= realloc( markup
, size
);
156 strcat( markup
, line
);
160 markup
= strdup( line
);
165 if ( markup
[ strlen( markup
) - 1 ] == '\n' )
166 markup
[ strlen( markup
) - 1 ] = '\0';
168 mlt_properties_set( properties
, "resource", ( char * ) filename
);
169 mlt_properties_set( properties
, "markup", ( char * ) ( markup
== NULL ?
"" : markup
) );
174 mlt_properties_set( properties
, "markup", "" );
184 static void set_string( char **string
, char *value
, char *fallback
)
189 *string
= strdup( value
);
191 else if ( *string
== NULL
&& fallback
!= NULL
)
193 *string
= strdup( fallback
);
195 else if ( *string
!= NULL
&& fallback
== NULL
)
202 rgba_color
parse_color( char *color
)
204 rgba_color result
= { 0xff, 0xff, 0xff, 0xff };
206 if ( !strncmp( color
, "0x", 2 ) )
208 unsigned int temp
= 0;
209 sscanf( color
+ 2, "%x", &temp
);
210 result
.r
= ( temp
>> 24 ) & 0xff;
211 result
.g
= ( temp
>> 16 ) & 0xff;
212 result
.b
= ( temp
>> 8 ) & 0xff;
213 result
.a
= ( temp
) & 0xff;
215 else if ( !strcmp( color
, "red" ) )
221 else if ( !strcmp( color
, "green" ) )
227 else if ( !strcmp( color
, "blue" ) )
235 unsigned int temp
= 0;
236 sscanf( color
, "%d", &temp
);
237 result
.r
= ( temp
>> 24 ) & 0xff;
238 result
.g
= ( temp
>> 16 ) & 0xff;
239 result
.b
= ( temp
>> 8 ) & 0xff;
240 result
.a
= ( temp
) & 0xff;
246 /** Convert a string property to UTF-8
248 static int iconv_utf8( mlt_properties properties
, char *prop_name
, const char* encoding
)
250 char *text
= mlt_properties_get( properties
, prop_name
);
253 iconv_t cd
= iconv_open( "UTF-8", encoding
);
254 if ( cd
!= ( iconv_t
)-1 )
256 char *inbuf_p
= text
;
257 size_t inbuf_n
= strlen( text
);
258 size_t outbuf_n
= inbuf_n
* 6;
259 char *outbuf
= mlt_pool_alloc( outbuf_n
);
260 char *outbuf_p
= outbuf
;
262 memset( outbuf
, 0, outbuf_n
);
264 if ( text
!= NULL
&& strcmp( text
, "" ) && iconv( cd
, &inbuf_p
, &inbuf_n
, &outbuf_p
, &outbuf_n
) != -1 )
265 mlt_properties_set( properties
, prop_name
, outbuf
);
267 mlt_properties_set( properties
, prop_name
, "" );
269 mlt_pool_release( outbuf
);
276 static void refresh_image( mlt_frame frame
, int width
, int height
)
279 GdkPixbuf
*pixbuf
= NULL
;
281 // Obtain properties of frame
282 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
284 // Obtain the producer pango for this frame
285 producer_pango
this = mlt_properties_get_data( properties
, "producer_pango", NULL
);
287 // Obtain the producer
288 mlt_producer producer
= &this->parent
;
290 // Obtain the producer properties
291 mlt_properties producer_props
= MLT_PRODUCER_PROPERTIES( producer
);
293 // Get producer properties
294 char *fg
= mlt_properties_get( producer_props
, "fgcolour" );
295 char *bg
= mlt_properties_get( producer_props
, "bgcolour" );
296 int align
= alignment_parse( mlt_properties_get( producer_props
, "align" ) );
297 int pad
= mlt_properties_get_int( producer_props
, "pad" );
298 char *markup
= mlt_properties_get( producer_props
, "markup" );
299 char *text
= mlt_properties_get( producer_props
, "text" );
300 char *font
= mlt_properties_get( producer_props
, "font" );
301 char *encoding
= mlt_properties_get( producer_props
, "encoding" );
302 int weight
= mlt_properties_get_int( producer_props
, "weight" );
303 int size
= mlt_properties_get_int( producer_props
, "size" );
305 // See if any properties changed
306 int property_changed
= ( align
!= this->align
);
307 property_changed
= property_changed
|| ( this->fgcolor
== NULL
|| ( fg
&& strcmp( fg
, this->fgcolor
) ) );
308 property_changed
= property_changed
|| ( this->bgcolor
== NULL
|| ( bg
&& strcmp( bg
, this->bgcolor
) ) );
309 property_changed
= property_changed
|| ( pad
!= this->pad
);
310 property_changed
= property_changed
|| ( markup
&& this->markup
&& strcmp( markup
, this->markup
) );
311 property_changed
= property_changed
|| ( text
&& this->text
&& strcmp( text
, this->text
) );
312 property_changed
= property_changed
|| ( font
&& this->font
&& strcmp( font
, this->font
) );
313 property_changed
= property_changed
|| ( weight
!= this->weight
);
315 // Save the properties for next comparison
318 set_string( &this->fgcolor
, fg
, "0xffffffff" );
319 set_string( &this->bgcolor
, bg
, "0x00000000" );
320 set_string( &this->markup
, markup
, NULL
);
321 set_string( &this->text
, text
, NULL
);
322 set_string( &this->font
, font
, "Sans 48" );
323 this->weight
= weight
;
325 if ( property_changed
)
327 rgba_color fgcolor
= parse_color( this->fgcolor
);
328 rgba_color bgcolor
= parse_color( this->bgcolor
);
330 mlt_pool_release( this->image
);
331 mlt_pool_release( this->alpha
);
335 // Convert from specified encoding to UTF-8
336 if ( encoding
!= NULL
&& !strncaseeq( encoding
, "utf-8", 5 ) && !strncaseeq( encoding
, "utf8", 4 ) )
338 if ( markup
!= NULL
&& iconv_utf8( producer_props
, "markup", encoding
) != -1 )
340 markup
= mlt_properties_get( producer_props
, "markup" );
341 set_string( &this->markup
, markup
, NULL
);
343 if ( text
!= NULL
&& iconv_utf8( producer_props
, "text", encoding
) != -1 )
345 text
= mlt_properties_get( producer_props
, "text" );
346 set_string( &this->text
, text
, NULL
);
351 pixbuf
= pango_get_pixbuf( markup
, text
, font
, fgcolor
, bgcolor
, pad
, align
, weight
, size
);
353 if ( pixbuf
!= NULL
)
355 // Register this pixbuf for destruction and reuse
356 mlt_properties_set_data( producer_props
, "pixbuf", pixbuf
, 0, ( mlt_destructor
)g_object_unref
, NULL
);
358 mlt_properties_set_int( producer_props
, "real_width", gdk_pixbuf_get_width( pixbuf
) );
359 mlt_properties_set_int( producer_props
, "real_height", gdk_pixbuf_get_height( pixbuf
) );
361 // Store the width/height of the pixbuf temporarily
362 this->width
= gdk_pixbuf_get_width( pixbuf
);
363 this->height
= gdk_pixbuf_get_height( pixbuf
);
366 else if ( width
> 0 && ( this->image
== NULL
|| width
!= this->width
|| height
!= this->height
) )
368 mlt_pool_release( this->image
);
369 mlt_pool_release( this->alpha
);
373 pixbuf
= mlt_properties_get_data( producer_props
, "pixbuf", NULL
);
376 // If we have a pixbuf and a valid width
377 if ( pixbuf
&& width
> 0 )
379 char *interps
= mlt_properties_get( properties
, "rescale.interp" );
380 int interp
= GDK_INTERP_BILINEAR
;
382 if ( strcmp( interps
, "nearest" ) == 0 )
383 interp
= GDK_INTERP_NEAREST
;
384 else if ( strcmp( interps
, "tiles" ) == 0 )
385 interp
= GDK_INTERP_TILES
;
386 else if ( strcmp( interps
, "hyper" ) == 0 )
387 interp
= GDK_INTERP_HYPER
;
389 // fprintf( stderr, "SCALING PANGO from %dx%d to %dx%d was %dx%d\n", gdk_pixbuf_get_width( pixbuf ), gdk_pixbuf_get_height( pixbuf ), width, height, this->width, this->height );
391 // Note - the original pixbuf is already safe and ready for destruction
392 pixbuf
= gdk_pixbuf_scale_simple( pixbuf
, width
, height
, interp
);
394 // Store width and height
396 this->height
= height
;
398 // Allocate/define image
399 this->image
= mlt_pool_alloc( width
* ( height
+ 1 ) * 2 );
400 this->alpha
= mlt_pool_alloc( this->width
* this->height
);
403 mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf
),
404 this->width
, this->height
,
405 gdk_pixbuf_get_rowstride( pixbuf
),
406 this->image
, this->alpha
);
408 // Finished with pixbuf now
409 g_object_unref( pixbuf
);
413 mlt_properties_set_int( properties
, "width", this->width
);
414 mlt_properties_set_int( properties
, "height", this->height
);
415 mlt_properties_set_int( properties
, "real_width", mlt_properties_get_int( producer_props
, "real_width" ) );
416 mlt_properties_set_int( properties
, "real_height", mlt_properties_get_int( producer_props
, "real_height" ) );
418 // pass the image data without destructor
419 mlt_properties_set_data( properties
, "image", this->image
, this->width
* ( this->height
+ 1 ) * 2, NULL
, NULL
);
420 mlt_properties_set_data( properties
, "alpha", this->alpha
, this->width
* this->height
, NULL
, NULL
);
423 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
425 // Obtain properties of frame
426 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
428 *width
= mlt_properties_get_int( properties
, "rescale_width" );
429 *height
= mlt_properties_get_int( properties
, "rescale_height" );
432 refresh_image( frame
, *width
, *height
);
435 //mlt_producer this = mlt_properties_get_data( properties, "producer_pango", NULL );
436 //*format = ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( this ), "bpp" ) == 4 ) ? mlt_image_rgb24a : mlt_image_rgb24;
438 // May need to know the size of the image to clone it
442 uint8_t *image
= mlt_properties_get_data( properties
, "image", &size
);
444 // Get width and height
445 *width
= mlt_properties_get_int( properties
, "width" );
446 *height
= mlt_properties_get_int( properties
, "height" );
448 // Clone if necessary
452 uint8_t *copy
= mlt_pool_alloc( size
);
453 if ( copy
!= NULL
&& image
!= NULL
)
454 memcpy( copy
, image
, size
);
456 // We're going to pass the copy on
459 // Now update properties so we free the copy after
460 mlt_properties_set_data( properties
, "image", copy
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
469 static uint8_t *producer_get_alpha_mask( mlt_frame
this )
471 // Obtain properties of frame
472 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
474 // Return the alpha mask
475 return mlt_properties_get_data( properties
, "alpha", NULL
);
478 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
480 producer_pango
this = producer
->child
;
483 *frame
= mlt_frame_init( );
485 // Obtain properties of frame and producer
486 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
488 // Set the producer on the frame properties
489 mlt_properties_set_data( properties
, "producer_pango", this, 0, NULL
, NULL
);
491 // Refresh the pango image
492 refresh_image( *frame
, 0, 0 );
494 // Set producer-specific frame properties
495 mlt_properties_set_int( properties
, "progressive", 1 );
496 mlt_properties_set_double( properties
, "aspect_ratio", 1 );
498 // Set alpha call back
499 ( *frame
)->get_alpha_mask
= producer_get_alpha_mask
;
501 // Stack the get image callback
502 mlt_frame_push_get_image( *frame
, producer_get_image
);
504 // Update timecode on the frame we're creating
505 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
507 // Calculate the next timecode
508 mlt_producer_prepare_next( producer
);
513 static void producer_close( mlt_producer parent
)
515 producer_pango
this = parent
->child
;
516 mlt_pool_release( this->image
);
517 mlt_pool_release( this->alpha
);
518 free( this->fgcolor
);
519 free( this->bgcolor
);
520 free( this->markup
);
523 parent
->close
= NULL
;
524 mlt_producer_close( parent
);
528 static void pango_draw_background( GdkPixbuf
*pixbuf
, rgba_color bg
)
530 int ww
= gdk_pixbuf_get_width( pixbuf
);
531 int hh
= gdk_pixbuf_get_height( pixbuf
);
532 uint8_t *p
= gdk_pixbuf_get_pixels( pixbuf
);
535 for ( j
= 0; j
< hh
; j
++ )
537 for ( i
= 0; i
< ww
; i
++ )
547 static GdkPixbuf
*pango_get_pixbuf( const char *markup
, const char *text
, const char *font
, rgba_color fg
, rgba_color bg
, int pad
, int align
, int weight
, int size
)
549 PangoContext
*context
= pango_ft2_font_map_create_context( fontmap
);
550 PangoLayout
*layout
= pango_layout_new( context
);
553 GdkPixbuf
*pixbuf
= NULL
;
556 uint8_t* dest
= NULL
;
559 PangoFontDescription
*desc
= pango_font_description_from_string( font
);
561 pango_ft2_font_map_set_resolution( fontmap
, 72, 72 );
562 pango_layout_set_width( layout
, -1 ); // set wrapping constraints
563 pango_font_description_set_weight( desc
, ( PangoWeight
) weight
);
565 pango_font_description_set_size( desc
, PANGO_SCALE
* size
);
566 pango_layout_set_font_description( layout
, desc
);
567 // pango_layout_set_spacing( layout, space );
568 pango_layout_set_alignment( layout
, ( PangoAlignment
) align
);
569 if ( markup
!= NULL
&& strcmp( markup
, "" ) != 0 )
570 pango_layout_set_markup( layout
, markup
, strlen( markup
) );
571 else if ( text
!= NULL
&& strcmp( text
, "" ) != 0 )
572 pango_layout_set_text( layout
, text
, strlen( text
) );
574 pango_layout_set_text( layout
, " ", 2 );
575 pango_layout_get_pixel_size( layout
, &w
, &h
);
577 pixbuf
= gdk_pixbuf_new( GDK_COLORSPACE_RGB
, TRUE
/* has alpha */, 8, w
+ 2 * pad
, h
+ 2 * pad
);
578 pango_draw_background( pixbuf
, bg
);
580 stride
= gdk_pixbuf_get_rowstride( pixbuf
);
583 bitmap
.pitch
= 32 * ( ( w
+ 31 ) / 31 );
585 bitmap
.buffer
= mlt_pool_alloc( h
* bitmap
.pitch
);
586 bitmap
.num_grays
= 256;
587 bitmap
.pixel_mode
= ft_pixel_mode_grays
;
589 memset( bitmap
.buffer
, 0, h
* bitmap
.pitch
);
591 pango_ft2_render_layout( &bitmap
, layout
, 0, 0 );
594 x
= ( gdk_pixbuf_get_width( pixbuf
) - w
- 2 * pad
) * align
/ 2 + pad
;
595 dest
= gdk_pixbuf_get_pixels( pixbuf
) + 4 * x
+ pad
* stride
;
606 *d
++ = ( a
* fg
.r
+ ( 255 - a
) * bg
.r
) >> 8;
607 *d
++ = ( a
* fg
.g
+ ( 255 - a
) * bg
.g
) >> 8;
608 *d
++ = ( a
* fg
.b
+ ( 255 - a
) * bg
.b
) >> 8;
609 *d
++ = ( a
* fg
.a
+ ( 255 - a
) * bg
.a
) >> 8;
614 mlt_pool_release( bitmap
.buffer
);
615 pango_font_description_free( desc
);
616 g_object_unref( layout
);
617 g_object_unref( context
);