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Commit 252747db authored by Sigmund Augdal Helberg's avatar Sigmund Augdal Helberg
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freetype.c: Revived and revamped old yuva renderer 

Highlights:
  Three rendering modes: Outline, Fat outline and background
  Better looking
Drawbacks:
  White only at the moment
  no yuva blend filter for some chromas
  
the old renderer is available with the --freetype-yuvp option, since this is
needed at least for dvbsubs encoding. (and for people with no usable blend
filter)
parent 67215fdc
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Showing with 235 additions and 2 deletions
modules/misc/freetype.c
View file @ 252747db
......@@ -99,6 +99,18 @@ static int SetFontSize( filter_t *, int );
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,
......@@ -133,7 +145,12 @@ vlc_module_begin();
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 );
......@@ -172,6 +189,7 @@ struct filter_sys_t
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;
......@@ -210,12 +228,15 @@ static int Create( vlc_object_t *p_this )
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 );
......@@ -438,6 +459,215 @@ static int Render( filter_t *p_filter, subpicture_region_t *p_region,
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_line->i_width < i_width )
{
if( p_region->i_text_align == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( p_region->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;
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','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)(( 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;
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_line->i_width < i_width )
{
if( p_region->i_text_align == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( p_region->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] =
// ((p_dst_u[i_offset+x] *(255-(int)p_glyph->bitmap.buffer[i_bitmap_offset])) + i_u * ((int)p_glyph->bitmap.buffer[i_bitmap_offset]))>>8;
// p_dst_v[i_offset+x] =
// ((p_dst_v[i_offset+x] *(255-(int)p_glyph->bitmap.buffer[i_bitmap_offset])) + i_v * ((int)p_glyph->bitmap.buffer[i_bitmap_offset]))>>8;
if( p_filter->p_sys->i_effect == EFFECT_BACKGROUND )
p_dst_a[i_offset+x] = 0xff;
}
}
i_offset += i_pitch;
}
}
}
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
......@@ -701,7 +931,10 @@ static int RenderText( filter_t *p_filter, subpicture_region_t *p_region_out,
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 );
......
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