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vlc/modules/misc/freetype.c

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/*****************************************************************************
* freetype.c : Put text on the video, using freetype2
*****************************************************************************
* Copyright (C) 2002 - 2005 the VideoLAN team
* $Id$
*
* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
* Gildas Bazin <gbazin@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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <string.h>
#ifdef HAVE_LINUX_LIMITS_H
# include <linux/limits.h>
#endif
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include "vlc_osd.h"
#include "vlc_block.h"
#include "vlc_filter.h"
#include <math.h>
#ifdef HAVE_ERRNO_H
# include <errno.h>
#endif
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#ifdef __APPLE__
#define DEFAULT_FONT "/System/Library/Fonts/LucidaGrande.dfont"
#elif defined( SYS_BEOS )
#define DEFAULT_FONT "/boot/beos/etc/fonts/ttfonts/Swiss721.ttf"
#elif defined( WIN32 )
#define DEFAULT_FONT "" /* Default font found at run-time */
#else
#define DEFAULT_FONT "/usr/share/fonts/truetype/freefont/FreeSerifBold.ttf"
#endif
#if defined(HAVE_FRIBIDI)
#include <fribidi/fribidi.h>
#endif
typedef struct line_desc_t line_desc_t;
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy( vlc_object_t * );
/* The RenderText call maps to pf_render_string, defined in vlc_filter.h */
static int RenderText( filter_t *, subpicture_region_t *,
subpicture_region_t * );
static line_desc_t *NewLine( byte_t * );
static int SetFontSize( filter_t *, int );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define FONT_TEXT N_("Font")
#define FONT_LONGTEXT N_("Font filename")
#define FONTSIZE_TEXT N_("Font size in pixels")
#define FONTSIZE_LONGTEXT N_("The size of the fonts used by the osd module. " \
"If set to something different than 0 this option will override the " \
"relative font size " )
#define OPACITY_TEXT N_("Opacity, 0..255")
#define OPACITY_LONGTEXT N_("The opacity (inverse of transparency) of " \
"overlay text. 0 = transparent, 255 = totally opaque. " )
#define COLOR_TEXT N_("Text Default Color")
#define COLOR_LONGTEXT N_("The color of overlay text. 1 byte for each color, "\
"hexadecimal. #000000 = all colors off, 0xFF0000 = just Red, " \
"0xFFFFFF = all color on [White]" )
#define FONTSIZER_TEXT N_("Font size")
#define FONTSIZER_LONGTEXT N_("The size of the fonts used by the osd module" )
static int pi_sizes[] = { 20, 18, 16, 12, 6 };
static char *ppsz_sizes_text[] = { N_("Smaller"), N_("Small"), N_("Normal"),
N_("Large"), N_("Larger") };
#define YUVP_TEXT N_("Use yuvp renderer")
#define YUVP_LONGTEXT N_("Render into paletized YUV. Needed to encode into dvbsubs")
#define EFFECT_TEXT N_("Font Effect")
#define EFFECT_LONGTEXT N_("Select effects to apply to rendered text")
#define EFFECT_BACKGROUND 1
#define EFFECT_OUTLINE 2
#define EFFECT_OUTLINE_FAT 3
static int pi_effects[] = { 1, 2, 3 };
static char *ppsz_effects_text[] = { N_("Background"),N_("Outline"),
N_("Fat Outline") };
static int pi_color_values[] = {
0x00000000, 0x00808080, 0x00C0C0C0, 0x00FFFFFF, 0x00800000,
0x00FF0000, 0x00FF00FF, 0x00FFFF00, 0x00808000, 0x00008000, 0x00008080,
0x0000FF00, 0x00800080, 0x00000080, 0x000000FF, 0x0000FFFF };
static char *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") };
vlc_module_begin();
set_shortname( _("Text renderer"));
set_description( _("Freetype2 font renderer") );
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_SUBPIC );
add_file( "freetype-font", DEFAULT_FONT, NULL, FONT_TEXT, FONT_LONGTEXT,
VLC_FALSE );
add_integer( "freetype-fontsize", 0, NULL, FONTSIZE_TEXT,
FONTSIZE_LONGTEXT, VLC_TRUE );
/* opacity valid on 0..255, with default 255 = fully opaque */
add_integer_with_range( "freetype-opacity", 255, 0, 255, NULL,
OPACITY_TEXT, OPACITY_LONGTEXT, VLC_TRUE );
/* hook to the color values list, with default 0x00ffffff = white */
add_integer( "freetype-color", 0x00FFFFFF, NULL, COLOR_TEXT,
COLOR_LONGTEXT, VLC_FALSE );
change_integer_list( pi_color_values, ppsz_color_descriptions, 0 );
add_integer( "freetype-rel-fontsize", 16, NULL, FONTSIZER_TEXT,
FONTSIZER_LONGTEXT, VLC_FALSE );
change_integer_list( pi_sizes, ppsz_sizes_text, 0 );
add_integer( "freetype-effect", 2, NULL, EFFECT_TEXT,
EFFECT_LONGTEXT, VLC_FALSE );
change_integer_list( pi_effects, ppsz_effects_text, 0 );
add_bool( "freetype-yuvp", 0, NULL, YUVP_TEXT,
YUVP_LONGTEXT, VLC_TRUE );
set_capability( "text renderer", 100 );
add_shortcut( "text" );
set_callbacks( Create, Destroy );
vlc_module_end();
struct line_desc_t
{
/** NULL-terminated list of glyphs making the string */
FT_BitmapGlyph *pp_glyphs;
/** list of relative positions for the glyphs */
FT_Vector *p_glyph_pos;
int i_height;
int i_width;
int i_red, i_green, i_blue;
int i_alpha;
line_desc_t *p_next;
};
static int Render( filter_t *, subpicture_region_t *, line_desc_t *, int, int);
static void FreeLines( line_desc_t * );
static void FreeLine( line_desc_t * );
/*****************************************************************************
* filter_sys_t: freetype 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
{
FT_Library p_library; /* handle to library */
FT_Face p_face; /* handle to face object */
vlc_bool_t i_use_kerning;
uint8_t i_font_opacity;
int i_font_color;
int i_font_size;
int i_effect;
int i_default_font_size;
int i_display_height;
};
/*****************************************************************************
* 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;
char *psz_fontfile = NULL;
int i_error;
vlc_value_t val;
/* Allocate structure */
p_filter->p_sys = p_sys = malloc( sizeof( filter_sys_t ) );
if( !p_sys )
{
msg_Err( p_filter, "out of memory" );
return VLC_ENOMEM;
}
p_sys->p_face = 0;
p_sys->p_library = 0;
p_sys->i_font_size = 0;
p_sys->i_display_height = 0;
var_Create( p_filter, "freetype-font",
VLC_VAR_STRING | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-fontsize",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-rel-fontsize",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-opacity",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-effect",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Get( p_filter, "freetype-opacity", &val );
p_sys->i_font_opacity = __MAX( __MIN( val.i_int, 255 ), 0 );
var_Create( p_filter, "freetype-color",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Get( p_filter, "freetype-color", &val );
p_sys->i_font_color = __MAX( __MIN( val.i_int, 0xFFFFFF ), 0 );
p_sys->i_effect = var_GetInteger( p_filter, "freetype-effect" );
/* Look what method was requested */
var_Get( p_filter, "freetype-font", &val );
psz_fontfile = val.psz_string;
if( !psz_fontfile || !*psz_fontfile )
{
if( psz_fontfile ) free( psz_fontfile );
psz_fontfile = (char *)malloc( PATH_MAX + 1 );
#ifdef WIN32
GetWindowsDirectory( psz_fontfile, PATH_MAX + 1 );
strcat( psz_fontfile, "\\fonts\\arial.ttf" );
#elif __APPLE__
strcpy( psz_fontfile, DEFAULT_FONT );
#else
msg_Err( p_filter, "user didn't specify a font" );
goto error;
#endif
}
i_error = FT_Init_FreeType( &p_sys->p_library );
if( i_error )
{
msg_Err( p_filter, "couldn't initialize freetype" );
goto error;
}
i_error = FT_New_Face( p_sys->p_library, psz_fontfile ? psz_fontfile : "",
0, &p_sys->p_face );
if( i_error == FT_Err_Unknown_File_Format )
{
msg_Err( p_filter, "file %s have unknown format", psz_fontfile );
goto error;
}
else if( i_error )
{
msg_Err( p_filter, "failed to load font file %s", psz_fontfile );
goto error;
}
i_error = FT_Select_Charmap( p_sys->p_face, ft_encoding_unicode );
if( i_error )
{
msg_Err( p_filter, "Font has no unicode translation table" );
goto error;
}
p_sys->i_use_kerning = FT_HAS_KERNING( p_sys->p_face );
var_Get( p_filter, "freetype-fontsize", &val );
p_sys->i_default_font_size = val.i_int;
if( SetFontSize( p_filter, 0 ) != VLC_SUCCESS ) goto error;
if( psz_fontfile ) free( psz_fontfile );
p_filter->pf_render_text = RenderText;
return VLC_SUCCESS;
error:
if( p_sys->p_face ) FT_Done_Face( p_sys->p_face );
if( p_sys->p_library ) FT_Done_FreeType( p_sys->p_library );
if( psz_fontfile ) free( psz_fontfile );
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* 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;
FT_Done_Face( p_sys->p_face );
FT_Done_FreeType( p_sys->p_library );
free( p_sys );
}
/*****************************************************************************
* Render: place string in picture
*****************************************************************************
* This function merges the previously rendered freetype glyphs into a picture
*****************************************************************************/
static int Render( filter_t *p_filter, subpicture_region_t *p_region,
line_desc_t *p_line, int i_width, int i_height )
{
static uint8_t pi_gamma[16] =
{0x00, 0x52, 0x84, 0x96, 0xb8, 0xca, 0xdc, 0xee, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
uint8_t *p_dst;
video_format_t fmt;
int i, x, y, i_pitch;
uint8_t i_y; /* YUV values, derived from incoming RGB */
int8_t i_u, i_v;
subpicture_region_t *p_region_tmp;
/* Create a new subpicture region */
memset( &fmt, 0, sizeof(video_format_t) );
fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
fmt.i_aspect = 0;
fmt.i_width = fmt.i_visible_width = i_width + 4;
fmt.i_height = fmt.i_visible_height = i_height + 4;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_region_tmp = spu_CreateRegion( p_filter, &fmt );
if( !p_region_tmp )
{
msg_Err( p_filter, "cannot allocate SPU region" );
return VLC_EGENERIC;
}
p_region->fmt = p_region_tmp->fmt;
p_region->picture = p_region_tmp->picture;
free( p_region_tmp );
/* Calculate text color components */
i_y = (uint8_t)(( 66 * p_line->i_red + 129 * p_line->i_green +
25 * p_line->i_blue + 128) >> 8) + 16;
i_u = (int8_t)(( -38 * p_line->i_red - 74 * p_line->i_green +
112 * p_line->i_blue + 128) >> 8) + 128;
i_v = (int8_t)(( 112 * p_line->i_red - 94 * p_line->i_green -
18 * p_line->i_blue + 128) >> 8) + 128;
/* Build palette */
fmt.p_palette->i_entries = 16;
for( i = 0; i < 8; i++ )
{
fmt.p_palette->palette[i][0] = 0;
fmt.p_palette->palette[i][1] = 0x80;
fmt.p_palette->palette[i][2] = 0x80;
fmt.p_palette->palette[i][3] = pi_gamma[i];
fmt.p_palette->palette[i][3] =
(int)fmt.p_palette->palette[i][3] * (255 - p_line->i_alpha) / 255;
}
for( i = 8; i < fmt.p_palette->i_entries; i++ )
{
fmt.p_palette->palette[i][0] = i * 16 * i_y / 256;
fmt.p_palette->palette[i][1] = i_u;
fmt.p_palette->palette[i][2] = i_v;
fmt.p_palette->palette[i][3] = pi_gamma[i];
fmt.p_palette->palette[i][3] =
(int)fmt.p_palette->palette[i][3] * (255 - p_line->i_alpha) / 255;
}
p_dst = p_region->picture.Y_PIXELS;
i_pitch = p_region->picture.Y_PITCH;
/* Initialize the region pixels */
memset( p_dst, 0, i_pitch * p_region->fmt.i_height );
for( ; p_line != NULL; p_line = p_line->p_next )
{
int i_glyph_tmax = 0;
int i_bitmap_offset, i_offset, i_align_offset = 0;
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_glyph_tmax = __MAX( i_glyph_tmax, p_glyph->top );
}
if( p_region->p_style && p_line->i_width < i_width )
{
if( p_region->p_style->i_text_align == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( p_region->p_style->i_text_align != SUBPICTURE_ALIGN_LEFT )
{
i_align_offset = ( i_width - p_line->i_width ) / 2;
}
}
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_offset = ( p_line->p_glyph_pos[ i ].y +
i_glyph_tmax - p_glyph->top + 2 ) *
i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 2 +
i_align_offset;
for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
{
if( p_glyph->bitmap.buffer[i_bitmap_offset] )
p_dst[i_offset+x] =
((int)p_glyph->bitmap.buffer[i_bitmap_offset] + 8)/16;
}
i_offset += i_pitch;
}
}
}
/* Outlining (find something better than nearest neighbour filtering ?) */
if( 1 )
{
uint8_t *p_dst = p_region->picture.Y_PIXELS;
uint8_t *p_top = p_dst; /* Use 1st line as a cache */
uint8_t left, current;
for( y = 1; y < (int)fmt.i_height - 1; y++ )
{
if( y > 1 ) memcpy( p_top, p_dst, fmt.i_width );
p_dst += p_region->picture.Y_PITCH;
left = 0;
for( x = 1; x < (int)fmt.i_width - 1; x++ )
{
current = p_dst[x];
p_dst[x] = ( 8 * (int)p_dst[x] + left + p_dst[x+1] + p_top[x -1]+ p_top[x] + p_top[x+1] +
p_dst[x -1 + p_region->picture.Y_PITCH ] + p_dst[x + p_region->picture.Y_PITCH] + p_dst[x + 1 + p_region->picture.Y_PITCH]) / 16;
left = current;
}
}
memset( p_top, 0, fmt.i_width );
}
return VLC_SUCCESS;
}
static void DrawBlack( line_desc_t *p_line, int i_width, subpicture_region_t *p_region, int xoffset, int yoffset )
{
uint8_t *p_dst = p_region->picture.A_PIXELS;
int i_pitch = p_region->picture.A_PITCH;
int x,y;
for( ; p_line != NULL; p_line = p_line->p_next )
{
int i_glyph_tmax=0, i = 0;
int i_bitmap_offset, i_offset, i_align_offset = 0;
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_glyph_tmax = __MAX( i_glyph_tmax, p_glyph->top );
}
if( p_region->p_style && p_line->i_width < i_width )
{
if( p_region->p_style->i_text_align == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( p_region->p_style->i_text_align != SUBPICTURE_ALIGN_LEFT )
{
i_align_offset = ( i_width - p_line->i_width ) / 2;
}
}
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_offset = ( p_line->p_glyph_pos[ i ].y +
i_glyph_tmax - p_glyph->top + 3 + yoffset ) *
i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 3 +
i_align_offset +xoffset;
for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
{
if( p_glyph->bitmap.buffer[i_bitmap_offset] )
if( p_dst[i_offset+x] <
((int)p_glyph->bitmap.buffer[i_bitmap_offset]) )
p_dst[i_offset+x] =
((int)p_glyph->bitmap.buffer[i_bitmap_offset]);
}
i_offset += i_pitch;
}
}
}
}
/*****************************************************************************
* Render: place string in picture
*****************************************************************************
* This function merges the previously rendered freetype glyphs into a picture
*****************************************************************************/
static int RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region,
line_desc_t *p_line, int i_width, int i_height )
{
static uint8_t pi_gamma[16] =
{0x00, 0x52, 0x84, 0x96, 0xb8, 0xca, 0xdc, 0xee, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
uint8_t *p_dst_y,*p_dst_u,*p_dst_v,*p_dst_a;
video_format_t fmt;
int i, x, y, i_pitch, i_alpha;
uint8_t i_y, i_u, i_v; /* YUV values, derived from incoming RGB */
subpicture_region_t *p_region_tmp;
if( i_width == 0 || i_height == 0 )
return VLC_SUCCESS;
/* 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 + 6;
fmt.i_height = fmt.i_visible_height = i_height + 6;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_region_tmp = spu_CreateRegion( p_filter, &fmt );
if( !p_region_tmp )
{
msg_Err( p_filter, "cannot allocate SPU region" );
return VLC_EGENERIC;
}
p_region->fmt = p_region_tmp->fmt;
p_region->picture = p_region_tmp->picture;
free( p_region_tmp );
/* Calculate text color components */
i_y = (uint8_t)__MIN(abs( 2104 * p_line->i_red + 4130 * p_line->i_green +
802 * p_line->i_blue + 4096 + 131072 ) >> 13, 235);
i_u = (uint8_t)__MIN(abs( -1214 * p_line->i_red + -2384 * p_line->i_green +
3598 * p_line->i_blue + 4096 + 1048576) >> 13, 240);
i_v = (uint8_t)__MIN(abs( 3598 * p_line->i_red + -3013 * p_line->i_green +
-585 * p_line->i_blue + 4096 + 1048576) >> 13, 240);
i_alpha = p_line->i_alpha;
p_dst_y = p_region->picture.Y_PIXELS;
p_dst_u = p_region->picture.U_PIXELS;
p_dst_v = p_region->picture.V_PIXELS;
p_dst_a = p_region->picture.A_PIXELS;
i_pitch = p_region->picture.A_PITCH;
/* Initialize the region pixels */
if( p_filter->p_sys->i_effect != EFFECT_BACKGROUND )
{
memset( p_dst_y, 0x00, i_pitch * p_region->fmt.i_height );
memset( p_dst_u, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_v, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_a, 0, i_pitch * p_region->fmt.i_height );
}
else
{
memset( p_dst_y, 0x0, i_pitch * p_region->fmt.i_height );
memset( p_dst_u, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_v, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_a, 0x80, i_pitch * p_region->fmt.i_height );
}
if( p_filter->p_sys->i_effect == EFFECT_OUTLINE ||
p_filter->p_sys->i_effect == EFFECT_OUTLINE_FAT )
{
DrawBlack( p_line, i_width, p_region, 0, 0);
DrawBlack( p_line, i_width, p_region, -1, 0);
DrawBlack( p_line, i_width, p_region, 0, -1);
DrawBlack( p_line, i_width, p_region, 1, 0);
DrawBlack( p_line, i_width, p_region, 0, 1);
}
if( p_filter->p_sys->i_effect == EFFECT_OUTLINE_FAT )
{
DrawBlack( p_line, i_width, p_region, -1, -1);
DrawBlack( p_line, i_width, p_region, -1, 1);
DrawBlack( p_line, i_width, p_region, 1, -1);
DrawBlack( p_line, i_width, p_region, 1, 1);
DrawBlack( p_line, i_width, p_region, -2, 0);
DrawBlack( p_line, i_width, p_region, 0, -2);
DrawBlack( p_line, i_width, p_region, 2, 0);
DrawBlack( p_line, i_width, p_region, 0, 2);
DrawBlack( p_line, i_width, p_region, -2, -2);
DrawBlack( p_line, i_width, p_region, -2, 2);
DrawBlack( p_line, i_width, p_region, 2, -2);
DrawBlack( p_line, i_width, p_region, 2, 2);
DrawBlack( p_line, i_width, p_region, -3, 0);
DrawBlack( p_line, i_width, p_region, 0, -3);
DrawBlack( p_line, i_width, p_region, 3, 0);
DrawBlack( p_line, i_width, p_region, 0, 3);
}
for( ; p_line != NULL; p_line = p_line->p_next )
{
int i_glyph_tmax = 0;
int i_bitmap_offset, i_offset, i_align_offset = 0;
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_glyph_tmax = __MAX( i_glyph_tmax, p_glyph->top );
}
if( p_region->p_style && p_line->i_width < i_width )
{
if( p_region->p_style->i_text_align == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( p_region->p_style->i_text_align != SUBPICTURE_ALIGN_LEFT )
{
i_align_offset = ( i_width - p_line->i_width ) / 2;
}
}
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_offset = ( p_line->p_glyph_pos[ i ].y +
i_glyph_tmax - p_glyph->top + 3 ) *
i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 3 +
i_align_offset;
for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
{
if( p_glyph->bitmap.buffer[i_bitmap_offset] )
{
p_dst_y[i_offset+x] = ((p_dst_y[i_offset+x] *(255-(int)p_glyph->bitmap.buffer[i_bitmap_offset])) +
i_y * ((int)p_glyph->bitmap.buffer[i_bitmap_offset])) >> 8;
p_dst_u[i_offset+x] = i_u;
p_dst_v[i_offset+x] = i_v;
if( p_filter->p_sys->i_effect == EFFECT_BACKGROUND )
p_dst_a[i_offset+x] = 0xff;
}
}
i_offset += i_pitch;
}
}
}
/* Apply the alpha setting */
for( i = 0; i < (int)fmt.i_height * i_pitch; i++ )
p_dst_a[i] = p_dst_a[i] * (255 - i_alpha) / 255;
return VLC_SUCCESS;
}
/**
* This function renders a text subpicture region into another one.
* It also calculates the size needed for this string, and renders the
* needed glyphs into memory. 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;
line_desc_t *p_lines = 0, *p_line = 0, *p_next = 0, *p_prev = 0;
int i, i_pen_y, i_pen_x, i_error, i_glyph_index, i_previous;
uint32_t *psz_unicode, *psz_unicode_orig = 0, i_char, *psz_line_start;
int i_string_length;
char *psz_string;
vlc_iconv_t iconv_handle = (vlc_iconv_t)(-1);
int i_font_color, i_font_alpha, i_font_size, i_red, i_green, i_blue;
FT_BBox line;
FT_BBox glyph_size;
FT_Vector result;
FT_Glyph tmp_glyph;
/* 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( 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 );
}
else
{
i_font_color = p_sys->i_font_color;
i_font_alpha = 255 - p_sys->i_font_opacity;
i_font_size = p_sys->i_default_font_size;
}
if( i_font_color == 0xFFFFFF ) i_font_color = p_sys->i_font_color;
if( !i_font_alpha ) i_font_alpha = 255 - p_sys->i_font_opacity;
SetFontSize( p_filter, i_font_size );
i_red = ( i_font_color & 0x00FF0000 ) >> 16;
i_green = ( i_font_color & 0x0000FF00 ) >> 8;
i_blue = i_font_color & 0x000000FF;
result.x = result.y = 0;
line.xMin = line.xMax = line.yMin = line.yMax = 0;
psz_unicode = psz_unicode_orig =
malloc( ( strlen(psz_string) + 1 ) * sizeof(uint32_t) );
if( psz_unicode == NULL )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
#if defined(WORDS_BIGENDIAN)
iconv_handle = vlc_iconv_open( "UCS-4BE", "UTF-8" );
#else
iconv_handle = vlc_iconv_open( "UCS-4LE", "UTF-8" );
#endif
if( iconv_handle == (vlc_iconv_t)-1 )
{
msg_Warn( p_filter, "unable to do conversion" );
goto error;
}
{
char *p_in_buffer, *p_out_buffer;
size_t i_in_bytes, i_out_bytes, i_out_bytes_left, i_ret;
i_in_bytes = strlen( psz_string );
i_out_bytes = i_in_bytes * sizeof( uint32_t );
i_out_bytes_left = i_out_bytes;
p_in_buffer = psz_string;
p_out_buffer = (char *)psz_unicode;
i_ret = vlc_iconv( iconv_handle, &p_in_buffer, &i_in_bytes,
&p_out_buffer, &i_out_bytes_left );
vlc_iconv_close( iconv_handle );
if( i_in_bytes )
{
msg_Warn( p_filter, "failed to convert string to unicode (%s), "
"bytes left %d", strerror(errno), (int)i_in_bytes );
goto error;
}
*(uint32_t*)p_out_buffer = 0;
i_string_length = (i_out_bytes - i_out_bytes_left) / sizeof(uint32_t);
}
#if defined(HAVE_FRIBIDI)
{
uint32_t *p_fribidi_string;
int start_pos, pos = 0;
p_fribidi_string = malloc( (i_string_length + 1) * sizeof(uint32_t) );
/* Do bidi conversion line-by-line */
while(pos < i_string_length)
{
while(pos < i_string_length) {
i_char = psz_unicode[pos];
if (i_char != '\r' && i_char != '\n')
break;
p_fribidi_string[pos] = i_char;
++pos;
}
start_pos = pos;
while(pos < i_string_length) {
i_char = psz_unicode[pos];
if (i_char == '\r' || i_char == '\n')
break;
++pos;
}
if (pos > start_pos)
{
FriBidiCharType base_dir = FRIBIDI_TYPE_LTR;
fribidi_log2vis((FriBidiChar*)psz_unicode + start_pos, pos - start_pos,
&base_dir, (FriBidiChar*)p_fribidi_string + start_pos, 0, 0, 0);
}
}
free( psz_unicode_orig );
psz_unicode = psz_unicode_orig = p_fribidi_string;
p_fribidi_string[ i_string_length ] = 0;
}
#endif
/* Calculate relative glyph positions and a bounding box for the
* entire string */
if( !(p_line = NewLine( (byte_t *)psz_string )) )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
p_lines = p_line;
i_pen_x = i_pen_y = 0;
i_previous = i = 0;
psz_line_start = psz_unicode;
#define face p_sys->p_face
#define glyph face->glyph
while( *psz_unicode )
{
i_char = *psz_unicode++;
if( i_char == '\r' ) /* ignore CR chars wherever they may be */
{
continue;
}
if( i_char == '\n' )
{
psz_line_start = psz_unicode;
if( !(p_next = NewLine( (byte_t *)psz_string )) )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
p_line->p_next = p_next;
p_line->i_width = line.xMax;
p_line->i_height = face->size->metrics.height >> 6;
p_line->pp_glyphs[ i ] = NULL;
p_line->i_alpha = i_font_alpha;
p_line->i_red = i_red;
p_line->i_green = i_green;
p_line->i_blue = i_blue;
p_prev = p_line;
p_line = p_next;
result.x = __MAX( result.x, line.xMax );
result.y += face->size->metrics.height >> 6;
i_pen_x = 0;
i_previous = i = 0;
line.xMin = line.xMax = line.yMin = line.yMax = 0;
i_pen_y += face->size->metrics.height >> 6;
#if 0
msg_Dbg( p_filter, "Creating new line, i is %d", i );
#endif
continue;
}
i_glyph_index = FT_Get_Char_Index( face, i_char );
if( p_sys->i_use_kerning && i_glyph_index
&& i_previous )
{
FT_Vector delta;
FT_Get_Kerning( face, i_previous, i_glyph_index,
ft_kerning_default, &delta );
i_pen_x += delta.x >> 6;
}
p_line->p_glyph_pos[ i ].x = i_pen_x;
p_line->p_glyph_pos[ i ].y = i_pen_y;
i_error = FT_Load_Glyph( face, i_glyph_index, FT_LOAD_DEFAULT );
if( i_error )
{
msg_Err( p_filter, "FT_Load_Glyph returned %d", i_error );
goto error;
}
i_error = FT_Get_Glyph( glyph, &tmp_glyph );
if( i_error )
{
msg_Err( p_filter, "FT_Get_Glyph returned %d", i_error );
goto error;
}
FT_Glyph_Get_CBox( tmp_glyph, ft_glyph_bbox_pixels, &glyph_size );
i_error = FT_Glyph_To_Bitmap( &tmp_glyph, ft_render_mode_normal, 0, 1);
if( i_error )
{
FT_Done_Glyph( tmp_glyph );
continue;
}
p_line->pp_glyphs[ i ] = (FT_BitmapGlyph)tmp_glyph;
/* Do rest */
line.xMax = p_line->p_glyph_pos[i].x + glyph_size.xMax -
glyph_size.xMin + ((FT_BitmapGlyph)tmp_glyph)->left;
if( line.xMax > (int)p_filter->fmt_out.video.i_visible_width - 20 )
{
p_line->pp_glyphs[ i ] = NULL;
FreeLine( p_line );
p_line = NewLine( (byte_t *)psz_string );
if( p_prev ) p_prev->p_next = p_line;
else p_lines = p_line;
while( psz_unicode > psz_line_start && *psz_unicode != ' ' )
{
psz_unicode--;
}
if( psz_unicode == psz_line_start )
{
msg_Warn( p_filter, "unbreakable string" );
goto error;
}
else
{
*psz_unicode = '\n';
}
psz_unicode = psz_line_start;
i_pen_x = 0;
i_previous = i = 0;
line.xMin = line.xMax = line.yMin = line.yMax = 0;
continue;
}
line.yMax = __MAX( line.yMax, glyph_size.yMax );
line.yMin = __MIN( line.yMin, glyph_size.yMin );
i_previous = i_glyph_index;
i_pen_x += glyph->advance.x >> 6;
i++;
}
p_line->i_width = line.xMax;
p_line->i_height = face->size->metrics.height >> 6;
p_line->pp_glyphs[ i ] = NULL;
p_line->i_alpha = i_font_alpha;
p_line->i_red = i_red;
p_line->i_green = i_green;
p_line->i_blue = i_blue;
result.x = __MAX( result.x, line.xMax );
result.y += line.yMax - line.yMin;
#undef face
#undef glyph
p_region_out->i_x = p_region_in->i_x;
p_region_out->i_y = p_region_in->i_y;
if( config_GetInt( p_filter, "freetype-yuvp" ) )
Render( p_filter, p_region_out, p_lines, result.x, result.y );
else
RenderYUVA( p_filter, p_region_out, p_lines, result.x, result.y );
if( psz_unicode_orig ) free( psz_unicode_orig );
FreeLines( p_lines );
return VLC_SUCCESS;
error:
if( psz_unicode_orig ) free( psz_unicode_orig );
FreeLines( p_lines );
return VLC_EGENERIC;
}
static void FreeLine( line_desc_t *p_line )
{
unsigned int i;
for( i = 0; p_line->pp_glyphs[ i ] != NULL; i++ )
{
FT_Done_Glyph( (FT_Glyph)p_line->pp_glyphs[ i ] );
}
free( p_line->pp_glyphs );
free( p_line->p_glyph_pos );
free( p_line );
}
static void FreeLines( line_desc_t *p_lines )
{
line_desc_t *p_line, *p_next;
if( !p_lines ) return;
for( p_line = p_lines; p_line != NULL; p_line = p_next )
{
p_next = p_line->p_next;
FreeLine( p_line );
}
}
static line_desc_t *NewLine( byte_t *psz_string )
{
int i_count;
line_desc_t *p_line = malloc( sizeof(line_desc_t) );
if( !p_line ) return NULL;
p_line->i_height = 0;
p_line->i_width = 0;
p_line->p_next = NULL;
/* We don't use CountUtf8Characters() here because we are not acutally
* sure the string is utf8. Better be safe than sorry. */
i_count = strlen( (char *)psz_string );
p_line->pp_glyphs = malloc( sizeof(FT_BitmapGlyph) * ( i_count + 1 ) );
if( p_line->pp_glyphs == NULL )
{
free( p_line );
return NULL;
}
p_line->pp_glyphs[0] = NULL;
p_line->p_glyph_pos = malloc( sizeof( FT_Vector ) * i_count + 1 );
if( p_line->p_glyph_pos == NULL )
{
free( p_line->pp_glyphs );
free( p_line );
return NULL;
}
return p_line;
}
static int SetFontSize( filter_t *p_filter, int i_size )
{
filter_sys_t *p_sys = p_filter->p_sys;
if( i_size && i_size == p_sys->i_font_size ) return VLC_SUCCESS;
if( !i_size )
{
vlc_value_t val;
if( !p_sys->i_default_font_size &&
p_sys->i_display_height == (int)p_filter->fmt_out.video.i_height )
return VLC_SUCCESS;
if( p_sys->i_default_font_size )
{
i_size = p_sys->i_default_font_size;
}
else
{
var_Get( p_filter, "freetype-rel-fontsize", &val );
i_size = (int)p_filter->fmt_out.video.i_height / val.i_int;
p_filter->p_sys->i_display_height =
p_filter->fmt_out.video.i_height;
}
if( i_size <= 0 )
{
msg_Warn( p_filter, "Invalid fontsize, using 12" );
i_size = 12;
}
msg_Dbg( p_filter, "Using fontsize: %i", i_size );
}
p_sys->i_font_size = i_size;
if( FT_Set_Pixel_Sizes( p_sys->p_face, 0, i_size ) )
{
msg_Err( p_filter, "couldn't set font size to %d", i_size );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}