+++ /dev/null
-/*
- * producer_pango.c -- a pango-based titler
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Dan Dennedy <dan@dennedy.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include "producer_pango.h"
-#include <framework/mlt_frame.h>
-#include <stdlib.h>
-#include <string.h>
-#include <gdk-pixbuf/gdk-pixbuf.h>
-#include <pango/pangoft2.h>
-#include <freetype/freetype.h>
-
-struct producer_pango_s
-{
- struct mlt_producer_s parent;
- int width;
- int height;
- uint8_t *image;
- uint8_t *alpha;
- int fgcolor;
- int bgcolor;
- int align;
- int pad;
- char *markup;
- char *text;
- char *font;
-};
-
-// special color type used by internal pango routines
-typedef struct
-{
- uint8_t r, g, b, a;
-} rgba_color;
-
-// Forward declarations
-static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
-static void producer_close( mlt_producer parent );
-static void pango_draw_background( GdkPixbuf *pixbuf, rgba_color bg );
-static GdkPixbuf *pango_get_pixbuf( const char *markup, const char *text, const char *font,
- rgba_color fg, rgba_color bg, int pad, int align );
-
-mlt_producer producer_pango_init( const char *filename )
-{
- producer_pango this = calloc( sizeof( struct producer_pango_s ), 1 );
- if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
- {
- mlt_producer producer = &this->parent;
-
- producer->get_frame = producer_get_frame;
- producer->close = producer_close;
-
- // This is required to initialise gdk-pixbuf
- g_type_init();
-
- // Get the properties interface
- mlt_properties properties = mlt_producer_properties( &this->parent );
-
- // Set the default properties
- mlt_properties_set_int( properties, "video_standard", mlt_video_standard_pal );
- mlt_properties_set_int( properties, "fgcolor", 0xffffffff );
- mlt_properties_set_int( properties, "bgcolor", 0x00000000 );
- mlt_properties_set_int( properties, "align", pango_align_left );
- mlt_properties_set_int( properties, "pad", 0 );
- mlt_properties_set( properties, "text", "" );
- mlt_properties_set( properties, "font", "Sans 48" );
- mlt_properties_set_int( properties, "x", 0 );
- mlt_properties_set_int( properties, "y", 0 );
- mlt_properties_set_double( properties, "mix", 1.0 );
-
- if ( filename == NULL )
- {
- mlt_properties_set( properties, "resource", "pango" );
- mlt_properties_set( properties, "markup", "" );
- }
- else
- {
- FILE *f = fopen( filename, "r" );
- if ( f != NULL )
- {
- char line[81];
- char *markup = NULL;
- size_t size = 0;
- line[80] = '\0';
-
- while ( fgets( line, 80, f ) )
- {
- size += strlen( line ) + 1;
- if ( markup )
- {
- realloc( markup, size );
- strcat( markup, line );
- }
- else
- {
- markup = strdup( line );
- }
- }
- fclose( f );
- mlt_properties_set( properties, "resource", ( char * ) filename );
- mlt_properties_set( properties, "markup", ( char * ) ( markup == NULL ? "" : markup ) );
- if ( markup )
- free( markup );
- }
- else
- {
- mlt_properties_set( properties, "resource", "pango" );
- mlt_properties_set( properties, "markup", "" );
- }
- }
-
- return producer;
- }
- free( this );
- return NULL;
-}
-
-static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
-{
- // Obtain properties of frame
- mlt_properties properties = mlt_frame_properties( this );
-
- // May need to know the size of the image to clone it
- int size = 0;
-
- // Get the image
- uint8_t *image = mlt_properties_get_data( properties, "image", &size );
-
- // Get width and height
- *width = mlt_properties_get_int( properties, "width" );
- *height = mlt_properties_get_int( properties, "height" );
-
- // Clone if necessary
- if ( writable )
- {
- // Clone our image
- uint8_t *copy = malloc( size );
- memcpy( copy, image, size );
-
- // We're going to pass the copy on
- image = copy;
-
- // Now update properties so we free the copy after
- mlt_properties_set_data( properties, "image", copy, size, free, NULL );
- }
-
- // Pass on the image
- *buffer = image;
-
- return 0;
-}
-
-static uint8_t *producer_get_alpha_mask( mlt_frame this )
-{
- // Obtain properties of frame
- mlt_properties properties = mlt_frame_properties( this );
-
- // Return the alpha mask
- return mlt_properties_get_data( properties, "alpha", NULL );
-}
-
-static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
-{
- producer_pango this = producer->child;
- GdkPixbuf *pixbuf = NULL;
-
- // Generate a frame
- *frame = mlt_frame_init( );
-
- // Obtain properties of frame and producer
- mlt_properties properties = mlt_frame_properties( *frame );
- mlt_properties producer_props = mlt_producer_properties( producer );
-
- // Get producer properties
- int fg = mlt_properties_get_int( producer_props, "fgcolor" );
- int bg = mlt_properties_get_int( producer_props, "bgcolor" );
- int align = mlt_properties_get_int( producer_props, "align" );
- int pad = mlt_properties_get_int( producer_props, "pad" );
- char *markup = mlt_properties_get( producer_props, "markup" );
- char *text = mlt_properties_get( producer_props, "text" );
- char *font = mlt_properties_get( producer_props, "font" );
-
- // See if any properties changed
- int property_changed = ( fg != this->fgcolor );
- property_changed = property_changed || ( bg != this->bgcolor );
- property_changed = property_changed || ( align != this->align );
- property_changed = property_changed || ( pad != this->pad );
- property_changed = property_changed || ( markup && this->markup && strcmp( markup, this->markup ) );
- property_changed = property_changed || ( text && this->text && strcmp( text, this->text ) );
- property_changed = property_changed || ( font && this->font && strcmp( font, this->font ) );
-
- // Save the properties for next comparison
- this->fgcolor = fg;
- this->bgcolor = bg;
- this->align = align;
- this->pad = pad;
- if ( markup != NULL )
- {
- if ( this->markup != NULL )
- free( this->markup );
- this->markup = strdup( markup );
- }
- if ( text != NULL )
- {
- if ( this->text != NULL )
- free( this->text );
- this->text = strdup( text );
- }
- if ( font != NULL )
- {
- if ( this->font != NULL )
- free( this->font );
- this->font = strdup( font );
- }
-
- if ( property_changed )
- {
- rgba_color fgcolor =
- {
- ( fg & 0xff000000 ) >> 24,
- ( fg & 0x00ff0000 ) >> 16,
- ( fg & 0x0000ff00 ) >> 8,
- ( fg & 0x000000ff )
- };
- rgba_color bgcolor =
- {
- ( bg & 0xff000000 ) >> 24,
- ( bg & 0x00ff0000 ) >> 16,
- ( bg & 0x0000ff00 ) >> 8,
- ( bg & 0x000000ff )
- };
-
- // Render the title
- pixbuf = pango_get_pixbuf( markup, text, font, fgcolor, bgcolor, pad, align );
- }
-
- // If we have a pixbuf
- if ( pixbuf )
- {
- // Scale to adjust for sample aspect ratio
- if ( mlt_properties_get_int( properties, "video_standard" ) == mlt_video_standard_pal )
- {
- GdkPixbuf *temp = pixbuf;
- GdkPixbuf *scaled = gdk_pixbuf_scale_simple( pixbuf,
- (gint) ( (float) gdk_pixbuf_get_width( pixbuf ) * 54.0/59.0),
- gdk_pixbuf_get_height( pixbuf ), GDK_INTERP_HYPER );
- pixbuf = scaled;
- g_object_unref( temp );
- }
- else
- {
- GdkPixbuf *temp = pixbuf;
- GdkPixbuf *scaled = gdk_pixbuf_scale_simple( pixbuf,
- (gint) ( (float) gdk_pixbuf_get_width( pixbuf ) * 11.0/10.0 ),
- gdk_pixbuf_get_height( pixbuf ), GDK_INTERP_HYPER );
- pixbuf = scaled;
- g_object_unref( temp );
- }
-
- // Store width and height
- this->width = gdk_pixbuf_get_width( pixbuf );
- this->height = gdk_pixbuf_get_height( pixbuf );
-
- // Allocate/define image and alpha
- uint8_t *image = malloc( this->width * this->height * 2 );
- uint8_t *alpha = NULL;
-
- // Extract YUV422 and alpha
- if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
- {
- // Allocate the alpha mask
- alpha = malloc( this->width * this->height );
-
- // Convert the image
- mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
- this->width, this->height,
- gdk_pixbuf_get_rowstride( pixbuf ),
- image, alpha );
- }
- else
- {
- // No alpha to extract
- mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
- this->width, this->height,
- gdk_pixbuf_get_rowstride( pixbuf ),
- image );
- }
-
- // Finished with pixbuf now
- g_object_unref( pixbuf );
-
- // if single picture, reference the image and alpha in the producer
- if ( this->image != NULL )
- free( this->image );
- this->image = image;
- if ( this->alpha != NULL )
- free( this->alpha );
- this->alpha = alpha;
-
- }
-
- if ( this->image != NULL )
- {
- // Set width/height
- mlt_properties_set_int( properties, "width", this->width );
- mlt_properties_set_int( properties, "height", this->height );
-
- // Set the compositing properties
- if ( mlt_properties_get( producer_props, "x" ) != NULL )
- mlt_properties_set_int( properties, "x", mlt_properties_get_int( producer_props, "x" ) );
- if ( mlt_properties_get( producer_props, "y" ) != NULL )
- mlt_properties_set_int( properties, "y", mlt_properties_get_int( producer_props, "y" ) );
- if ( mlt_properties_get( producer_props, "mix" ) != NULL )
- mlt_properties_set_double( properties, "image.mix", mlt_properties_get_double( producer_props, "mix" ) );
-
- // if picture sequence pass the image and alpha data without destructor
- mlt_properties_set_data( properties, "image", this->image, this->width * this->height * 2, NULL, NULL );
- mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
-
- // Set alpha mask call back
- ( *frame )->get_alpha_mask = producer_get_alpha_mask;
-
- // Stack the get image callback
- mlt_frame_push_get_image( *frame, producer_get_image );
- }
-
- // Update timecode on the frame we're creating
- mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
-
- // Calculate the next timecode
- mlt_producer_prepare_next( producer );
-
- return 0;
-}
-
-static void producer_close( mlt_producer parent )
-{
- producer_pango this = parent->child;
- if ( this->image != NULL )
- free( this->image );
- if ( this->alpha != NULL )
- free( this->alpha );
- if ( this->markup != NULL )
- free( this->markup );
- if ( this->text != NULL )
- free( this->text );
- if ( this->font != NULL )
- free( this->font );
- parent->close = NULL;
- mlt_producer_close( parent );
- free( this );
-}
-
-static void pango_draw_background( GdkPixbuf *pixbuf, rgba_color bg )
-{
- int ww = gdk_pixbuf_get_width( pixbuf );
- int hh = gdk_pixbuf_get_height( pixbuf );
- uint8_t *p = gdk_pixbuf_get_pixels( pixbuf );
- int i, j;
-
- for ( j = 0; j < hh; j++ )
- {
- for ( i = 0; i < ww; i++ )
- {
- *p++ = bg.r;
- *p++ = bg.g;
- *p++ = bg.b;
- *p++ = bg.a;
- }
- }
-}
-
-static GdkPixbuf *pango_get_pixbuf( const char *markup, const char *text, const char *font, rgba_color fg, rgba_color bg, int pad, int align )
-{
- PangoFT2FontMap *fontmap = (PangoFT2FontMap*) pango_ft2_font_map_new();
- PangoContext *context = pango_ft2_font_map_create_context( fontmap );
- PangoLayout *layout = pango_layout_new( context );
- int w, h, x;
- int i, j;
- GdkPixbuf *pixbuf = NULL;
- FT_Bitmap bitmap;
- uint8_t *src = NULL;
- uint8_t* dest = NULL;
- int stride;
-
- pango_ft2_font_map_set_resolution( fontmap, 72, 72 );
- pango_layout_set_width( layout, -1 ); // set wrapping constraints
- pango_layout_set_font_description( layout, pango_font_description_from_string( font ) );
-// pango_layout_set_spacing( layout, space );
- pango_layout_set_alignment( layout, ( PangoAlignment ) align );
- if ( markup != NULL && strcmp( markup, "" ) != 0 )
- pango_layout_set_markup( layout, markup, strlen( markup ) );
- else if ( text != NULL && strcmp( text, "" ) != 0 )
- pango_layout_set_text( layout, text, strlen( text ) );
- else
- return NULL;
- pango_layout_get_pixel_size( layout, &w, &h );
-
- pixbuf = gdk_pixbuf_new( GDK_COLORSPACE_RGB, TRUE /* has alpha */, 8, w + 2 * pad, h + 2 * pad );
- pango_draw_background( pixbuf, bg );
-
- stride = gdk_pixbuf_get_rowstride( pixbuf );
-
- bitmap.width = w;
- bitmap.pitch = 32 * ( ( w + 31 ) / 31 );
- bitmap.rows = h;
- bitmap.buffer = ( unsigned char * ) calloc( 1, h * bitmap.pitch );
- bitmap.num_grays = 256;
- bitmap.pixel_mode = ft_pixel_mode_grays;
-
- pango_ft2_render_layout( &bitmap, layout, 0, 0 );
-
- src = bitmap.buffer;
- x = ( gdk_pixbuf_get_width( pixbuf ) - w - 2 * pad ) * align / 2 + pad;
- dest = gdk_pixbuf_get_pixels( pixbuf ) + 4 * x + pad * stride;
- for ( j = 0; j < h; j++ )
- {
- uint8_t *d = dest;
- for ( i = 0; i < w; i++ )
- {
- float a = ( float ) bitmap.buffer[ j * bitmap.pitch + i ] / 255.0;
- *d++ = ( int ) ( a * fg.r + ( 1 - a ) * bg.r );
- *d++ = ( int ) ( a * fg.g + ( 1 - a ) * bg.g );
- *d++ = ( int ) ( a * fg.b + ( 1 - a ) * bg.b );
- *d++ = ( int ) ( a * fg.a + ( 1 - a ) * bg.a );
- }
- dest += stride;
- }
- free( bitmap.buffer );
-
- g_object_unref( layout );
- g_object_unref( context );
- g_object_unref( fontmap );
-
- return pixbuf;
-}
-
projects / mlt / blobdiff