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Commit 9043c727 authored by Sigmund Augdal Helberg's avatar Sigmund Augdal Helberg
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modules/misc/freetype.c: 

  - calculate and store size information for each line independently.
  - misc other fixes
parent f79c8d43
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Showing with 187 additions and 119 deletions
modules/misc/freetype.c
View file @ 9043c727
......@@ -2,7 +2,7 @@
* freetype.c : Put text on the video, using freetype2
*****************************************************************************
* Copyright (C) 2002, 2003 VideoLAN
* $Id: freetype.c,v 1.14 2003/07/26 18:54:20 titer Exp $
* $Id: freetype.c,v 1.15 2003/07/31 17:03:46 sigmunau Exp $
*
* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
*
......@@ -44,6 +44,8 @@
#define DEFAULT_FONT ""
#endif
typedef struct line_desc_t line_desc_t;
/*****************************************************************************
* Local prototypes
*****************************************************************************/
......@@ -59,8 +61,10 @@ static void RenderYUY2( vout_thread_t *, picture_t *,
static int AddText ( vout_thread_t *, byte_t *, text_style_t *, int,
int, int, mtime_t, mtime_t );
static int GetUnicodeCharFromUTF8( byte_t ** );
static int CountUtf8Characters( byte_t * );
static void FreeString( subpicture_t * );
static line_desc_t *NewLine( byte_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
......@@ -91,10 +95,18 @@ struct subpicture_sys_t
int i_flags;
/** The string associated with this subpicture */
byte_t *psz_text;
line_desc_t *p_lines;
};
struct line_desc_t
{
/** NULL-terminated list of glyphs making the string */
FT_BitmapGlyph *pp_glyphs;
FT_BitmapGlyph *pp_glyphs;
/** list of relative positions for the glyphs */
FT_Vector *p_glyph_pos;
FT_Vector *p_glyph_pos;
int i_height;
int i_width;
line_desc_t *p_next;
};
/*****************************************************************************
......@@ -279,43 +291,44 @@ static void RenderI420( vout_thread_t *p_vout, picture_t *p_pic,
subpicture_sys_t *p_string = p_subpic->p_sys;
int i_plane, x, y, pen_x, pen_y;
unsigned int i;
line_desc_t *p_line;
for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
for( p_line = p_subpic->p_sys->p_lines; p_line != NULL; p_line = p_line->p_next )
{
uint8_t *p_in;
int i_pitch = p_pic->p[i_plane].i_pitch;
for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
{
uint8_t *p_in;
int i_pitch = p_pic->p[ i_plane ].i_pitch;
p_in = p_pic->p[i_plane].p_pixels;
p_in = p_pic->p[ i_plane ].p_pixels;
if ( i_plane == 0 )
{
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
{
pen_y = p_pic->p[i_plane].i_lines - p_string->i_height -
p_string->i_y_margin;
}
else
if ( i_plane == 0 )
{
pen_y = p_string->i_y_margin;
}
pen_y += p_vout->p_text_renderer_data->p_face->size->metrics.height / 100;
if ( p_string->i_flags & OSD_ALIGN_RIGHT )
{
pen_x = i_pitch - p_string->i_width
- p_string->i_x_margin;
}
else
{
pen_x = p_string->i_x_margin;
}
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
{
pen_y = p_pic->p[ i_plane ].i_lines - p_string->i_height -
p_string->i_y_margin;
}
else
{
pen_y = p_string->i_y_margin;
}
pen_y += p_vout->p_text_renderer_data->p_face->size->metrics.ascender >> 6;
if ( p_string->i_flags & OSD_ALIGN_RIGHT )
{
pen_x = i_pitch - p_line->i_width
- p_string->i_x_margin;
}
else
{
pen_x = p_string->i_x_margin;
}
for( i = 0; p_string->pp_glyphs[i] != NULL; i++ )
{
if( p_string->pp_glyphs[i] )
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_string->pp_glyphs[ i ];
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
#define alpha p_vout->p_text_renderer_data->pi_gamma[ p_glyph->bitmap.buffer[ x + y * p_glyph->bitmap.width ] ]
#define pixel p_in[ ( p_string->p_glyph_pos[ i ].y + pen_y + y - p_glyph->top ) * i_pitch+x + pen_x + p_string->p_glyph_pos[ i ].x + p_glyph->left ]
#define pixel p_in[ ( p_line->p_glyph_pos[ i ].y + pen_y + y - p_glyph->top ) * i_pitch+x + pen_x + p_line->p_glyph_pos[ i ].x + p_glyph->left ]
for(y = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++ )
......@@ -328,36 +341,33 @@ static void RenderI420( vout_thread_t *p_vout, picture_t *p_pic,
}
}
}
}
else
{
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
{
pen_y = p_pic->p[i_plane].i_lines - ( p_string->i_height>>1) -
(p_string->i_y_margin>>1);
}
else
{
pen_y = p_string->i_y_margin >> 1;
}
pen_y += p_vout->p_text_renderer_data->p_face->size->metrics.height / 200;
if ( p_string->i_flags & OSD_ALIGN_RIGHT )
{
pen_x = i_pitch - ( p_string->i_width >> 1 )
- ( p_string->i_x_margin >> 1 );
}
else
{
pen_x = p_string->i_x_margin >> 1;
}
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
{
pen_y = p_pic->p[i_plane].i_lines - ( p_string->i_height>>1) -
(p_string->i_y_margin>>1);
}
else
{
pen_y = p_string->i_y_margin >> 1;
}
pen_y += p_vout->p_text_renderer_data->p_face->size->metrics.ascender >> 7;
if ( p_string->i_flags & OSD_ALIGN_RIGHT )
{
pen_x = i_pitch - ( p_line->i_width >> 1 )
- ( p_string->i_x_margin >> 1 );
}
else
{
pen_x = p_string->i_x_margin >> 1;
}
for( i = 0; p_string->pp_glyphs[i] != NULL; i++ )
{
if( p_string->pp_glyphs[i] )
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_string->pp_glyphs[ i ];
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
#define alpha p_vout->p_text_renderer_data->pi_gamma[ p_glyph->bitmap.buffer[ ( x + y * p_glyph->bitmap.width ) ] ]
#define pixel p_in[ ( (p_string->p_glyph_pos[ i ].y>>1) + pen_y + (y>>1) - ( p_glyph->top >> 1 ) ) * i_pitch + ( x >> 1 ) + pen_x + ( p_string->p_glyph_pos[ i ].x >> 1 ) + ( p_glyph->left >>1) ]
#define pixel p_in[ ( ( p_line->p_glyph_pos[ i ].y >> 1 ) + pen_y + ( y >> 1 ) - ( p_glyph->top >> 1 ) ) * i_pitch + ( x >> 1 ) + pen_x + ( p_line->p_glyph_pos[ i ].x >> 1 ) + ( p_glyph->left >>1) ]
for( y = 0; y < p_glyph->bitmap.rows; y+=2 )
{
for( x = 0; x < p_glyph->bitmap.width; x+=2 )
......@@ -381,47 +391,48 @@ static void RenderYUY2( vout_thread_t *p_vout, picture_t *p_pic,
const subpicture_t *p_subpic )
{
subpicture_sys_t *p_string = p_subpic->p_sys;
int x, y, pen_x, pen_y;
int i_plane, x, y, pen_x, pen_y;
unsigned int i;
line_desc_t *p_line;
uint8_t *p_in;
int i_pitch = p_pic->p[0].i_pitch;
p_in = p_pic->p->p_pixels;
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
for( p_line = p_subpic->p_sys->p_lines; p_line != NULL; p_line = p_line->p_next )
{
pen_y = p_pic->p->i_lines - p_string->i_height -
uint8_t *p_in;
int i_pitch = p_pic->p[ i_plane ].i_pitch;
p_in = p_pic->p[ i_plane ].p_pixels;
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
{
pen_y = p_pic->p[ i_plane ].i_lines - p_string->i_height -
p_string->i_y_margin;
}
else
{
pen_y = p_string->i_y_margin;
}
pen_y += p_vout->p_text_renderer_data->p_face->size->metrics.height / 100;
if ( p_string->i_flags & OSD_ALIGN_RIGHT )
{
pen_x = i_pitch - p_string->i_width - p_string->i_x_margin;
}
else
{
pen_x = p_string->i_x_margin;
}
/* TODO : set U & V bytes */
for( i = 0; p_string->pp_glyphs[i] != NULL; i++ )
{
if( p_string->pp_glyphs[i] )
}
else
{
FT_BitmapGlyph p_glyph = p_string->pp_glyphs[ i ];
pen_y = p_string->i_y_margin;
}
pen_y += p_vout->p_text_renderer_data->p_face->size->metrics.ascender >> 6;
if ( p_string->i_flags & OSD_ALIGN_RIGHT )
{
pen_x = i_pitch - p_line->i_width
- p_string->i_x_margin;
}
else
{
pen_x = p_string->i_x_margin;
}
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
#define alpha p_vout->p_text_renderer_data->pi_gamma[ p_glyph->bitmap.buffer[ x + y * p_glyph->bitmap.width ] ]
#define pixel p_in[ ( p_string->p_glyph_pos[ i ].y + pen_y + y - p_glyph->top ) * i_pitch + 2 * ( x + pen_x + p_string->p_glyph_pos[ i ].x + p_glyph->left ) ]
for( y = 0; y < p_glyph->bitmap.rows; y++ )
#define pixel p_in[ ( p_line->p_glyph_pos[ i ].y + pen_y + y - p_glyph->top ) * i_pitch + 2 * ( x + pen_x + p_line->p_glyph_pos[ i ].x + p_glyph->left ) ]
for(y = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++ )
{
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 ) +
( 255 * alpha >> 8 );
( 255 * alpha >> 8 );
#undef alpha
#undef pixel
}
......@@ -444,6 +455,8 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
subpicture_sys_t *p_string;
int i, i_pen_y, i_pen_x, i_error, i_glyph_index, i_previous, i_char;
subpicture_t *p_subpic;
line_desc_t *p_line, *p_next;
FT_BBox line;
FT_BBox glyph_size;
FT_Vector result;
......@@ -455,7 +468,6 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
line.xMax = 0;
line.yMin = 0;
line.yMax = 0;
/* Create and initialize a subpicture */
p_subpic = vout_CreateSubPicture( p_vout, MEMORY_SUBPICTURE );
if ( p_subpic == NULL )
......@@ -488,23 +500,16 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
p_string->i_y_margin = i_vmargin;
p_string->psz_text = strdup( psz_string );
p_string->pp_glyphs = malloc( sizeof(FT_GlyphSlot)
* ( strlen( p_string->psz_text ) + 1 ) );
if( p_string->pp_glyphs == NULL )
{
msg_Err( p_vout, "Out of memory" );
return VLC_ENOMEM;
}
p_string->p_glyph_pos = malloc( sizeof( FT_Vector )
* strlen( p_string->psz_text ) );
if( p_string->p_glyph_pos == NULL )
/* Calculate relative glyph positions and a bounding box for the
* entire string */
p_line = NewLine( psz_string );
if( p_line == NULL )
{
msg_Err( p_vout, "Out of memory" );
return VLC_ENOMEM;
}
/* Calculate relative glyph positions and a bounding box for the
* entire string */
p_string->p_lines = p_line;
i_pen_x = 0;
i_pen_y = 0;
i_previous = 0;
......@@ -520,14 +525,27 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
}
if ( i_char == '\n' )
{
i_pen_x = 0;
p_next = NewLine( psz_string );
if( p_next == NULL )
{
msg_Err( p_vout, "Out of memory" );
return VLC_ENOMEM;
}
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 = p_next;
result.x = __MAX( result.x, line.xMax );
result.y += face->size->metrics.height / 100;
result.y += face->size->metrics.height >> 6;
i_pen_x = 0;
line.xMin = 0;
line.xMax = 0;
line.yMin = 0;
line.yMax = 0;
i_pen_y += face->size->metrics.height / 100;
i_pen_y += face->size->metrics.height >> 6;
msg_Dbg( p_vout, "Creating new line, i is %d", i );
i = 0;
continue;
}
i_glyph_index = FT_Get_Char_Index( face, i_char );
......@@ -540,8 +558,8 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
i_pen_x += delta.x >> 6;
}
p_string->p_glyph_pos[ i ].x = i_pen_x;
p_string->p_glyph_pos[ i ].y = i_pen_y;
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 )
{
......@@ -555,15 +573,13 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
return VLC_EGENERIC;
}
FT_Glyph_Get_CBox( tmp_glyph, ft_glyph_bbox_pixels, &glyph_size );
i_error = FT_Glyph_To_Bitmap( &tmp_glyph,
ft_render_mode_normal,
NULL,
1 );
i_error = FT_Glyph_To_Bitmap( &tmp_glyph, ft_render_mode_normal,
NULL, 1 );
if ( i_error ) continue;
p_string->pp_glyphs[ i ] = (FT_BitmapGlyph)tmp_glyph;
p_line->pp_glyphs[ i ] = (FT_BitmapGlyph)tmp_glyph;
/* Do rest */
line.xMax = p_string->p_glyph_pos[i].x + glyph_size.xMax - glyph_size.xMin;
line.xMax = p_line->p_glyph_pos[i].x + glyph_size.xMax - glyph_size.xMin;
line.yMax = __MAX( line.yMax, glyph_size.yMax );
line.yMin = __MIN( line.yMin, glyph_size.yMin );
......@@ -571,7 +587,9 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
i_pen_x += glyph->advance.x >> 6;
i++;
}
p_string->pp_glyphs[i] = NULL;
p_line->i_width = line.xMax;
p_line->i_height = face->size->metrics.height >> 6;
p_line->pp_glyphs[ i ] = NULL;
result.x = __MAX( result.x, line.xMax );
result.y += line.yMax - line.yMin;
p_string->i_height = result.y;
......@@ -589,13 +607,20 @@ static void FreeString( subpicture_t *p_subpic )
{
unsigned int i;
subpicture_sys_t *p_string = p_subpic->p_sys;
for ( i = 0; p_string->pp_glyphs[ i ] != NULL; i++ )
line_desc_t *p_line, *p_next;
for( p_line = p_string->p_lines; p_line != NULL; p_line = p_next )
{
FT_Done_Glyph( (FT_Glyph)p_string->pp_glyphs[ i ] );
p_next = p_line->p_next;
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 );
}
free( p_string->psz_text );
free( p_string->p_glyph_pos );
free( p_string->pp_glyphs );
free( p_string );
}
......@@ -642,3 +667,46 @@ static int GetUnicodeCharFromUTF8( byte_t **ppsz_utf8_string )
(*ppsz_utf8_string)++;
return i_char;
}
static int CountUtf8Characters( byte_t *psz_string )
{
int i, i_num;
i = 0;
i_num = 0;
while( psz_string[ i ] != 0 && psz_string[ i ] != 10 )
{
if( psz_string[ i ] != 13 && psz_string[ i ] < 0x80 )
{
i_num++;
}
i++;
}
printf( "number of characters in line is %d\n", i_num );
return i_num;
}
static line_desc_t *NewLine( byte_t *psz_string )
{
line_desc_t *p_line;
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;
p_line->pp_glyphs = malloc( sizeof(FT_BitmapGlyph)
* ( CountUtf8Characters( psz_string ) + 1 ) );
if( p_line->pp_glyphs == NULL )
{
return NULL;
}
p_line->p_glyph_pos = malloc( sizeof( FT_Vector )
* CountUtf8Characters( psz_string ) );
if( p_line->p_glyph_pos == NULL )
{
return NULL;
}
return p_line;
}
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