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Commit 5e207686 authored by Gildas Bazin's avatar Gildas Bazin
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* modules/misc/freetype.c: don't assume input string is in utf8 when calculating its length (better alloc more space than necessary).
   + cleanup.
parent ac9acd63
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Showing with 65 additions and 42 deletions
modules/misc/freetype.c
View file @ 5e207686
......@@ -2,7 +2,7 @@
* freetype.c : Put text on the video, using freetype2
*****************************************************************************
* Copyright (C) 2002, 2003 VideoLAN
* $Id: freetype.c,v 1.15 2003/07/31 17:03:46 sigmunau Exp $
* $Id: freetype.c,v 1.16 2003/08/04 23:31:53 gbazin Exp $
*
* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
*
......@@ -60,11 +60,12 @@ static void RenderYUY2( vout_thread_t *, picture_t *,
const subpicture_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 int GetUnicodeCharFromUTF8( byte_t ** );
static line_desc_t *NewLine( byte_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
......@@ -219,7 +220,8 @@ static int Create( vlc_object_t *p_this )
FT_HAS_KERNING(p_vout->p_text_renderer_data->p_face);
var_Get( p_vout, "freetype-fontsize", &val );
i_error = FT_Set_Pixel_Sizes( p_vout->p_text_renderer_data->p_face, 0, val.i_int );
i_error = FT_Set_Pixel_Sizes( p_vout->p_text_renderer_data->p_face, 0,
val.i_int );
if( i_error )
{
msg_Err( p_vout, "couldn't set font size to %d", val.i_int );
......@@ -391,20 +393,21 @@ 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 i_plane, x, y, pen_x, pen_y;
int x, y, pen_x, pen_y;
unsigned int i;
line_desc_t *p_line;
for( p_line = p_subpic->p_sys->p_lines; p_line != NULL; p_line = p_line->p_next )
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;
int i_pitch = p_pic->p[0].i_pitch;
p_in = p_pic->p[ i_plane ].p_pixels;
p_in = p_pic->p[0].p_pixels;
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
{
pen_y = p_pic->p[ i_plane ].i_lines - p_string->i_height -
pen_y = p_pic->p[0].i_lines - p_string->i_height -
p_string->i_y_margin;
}
else
......@@ -456,24 +459,36 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_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;
FT_Glyph tmp_glyph;
/* Sanity check */
if ( !psz_string || !*psz_string )
{
return VLC_EGENERIC;
}
result.x = 0;
result.y = 0;
line.xMin = 0;
line.xMax = 0;
line.yMin = 0;
line.yMax = 0;
p_line = 0;
p_string = 0;
p_subpic = 0;
/* Create and initialize a subpicture */
p_subpic = vout_CreateSubPicture( p_vout, MEMORY_SUBPICTURE );
if ( p_subpic == NULL )
{
return VLC_EGENERIC;
}
p_subpic->p_sys = 0;
p_subpic->pf_render = Render;
p_subpic->pf_destroy = FreeString;
p_subpic->i_start = i_start;
......@@ -491,14 +506,14 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
p_string = malloc( sizeof(subpicture_sys_t) );
if ( p_string == NULL )
{
vout_DestroySubPicture( p_vout, p_subpic );
return VLC_ENOMEM;
msg_Err( p_vout, "Out of memory" );
goto error;
}
p_subpic->p_sys = p_string;
p_string->i_flags = i_flags;
p_string->i_x_margin = i_hmargin;
p_string->i_y_margin = i_vmargin;
p_string->p_lines = 0;
p_string->psz_text = strdup( psz_string );
/* Calculate relative glyph positions and a bounding box for the
......@@ -507,29 +522,33 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
if( p_line == NULL )
{
msg_Err( p_vout, "Out of memory" );
return VLC_ENOMEM;
goto error;
}
p_string->p_lines = p_line;
i_pen_x = 0;
i_pen_y = 0;
i_previous = 0;
i = 0;
#define face p_vout->p_text_renderer_data->p_face
#define glyph face->glyph
while( *psz_string )
{
i_char = GetUnicodeCharFromUTF8( &psz_string );
#define face p_vout->p_text_renderer_data->p_face
#define glyph face->glyph
if ( i_char == 13 ) /* ignore CR chars wherever they may be */
if ( i_char == '\r' ) /* ignore CR chars wherever they may be */
{
continue;
}
if ( i_char == '\n' )
{
p_next = NewLine( psz_string );
if( p_next == NULL )
{
msg_Err( p_vout, "Out of memory" );
return VLC_ENOMEM;
goto error;
}
p_line->p_next = p_next;
p_line->i_width = line.xMax;
......@@ -548,6 +567,7 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
i = 0;
continue;
}
i_glyph_index = FT_Get_Char_Index( face, i_char );
if ( p_vout->p_text_renderer_data->i_use_kerning && i_glyph_index
&& i_previous )
......@@ -564,13 +584,13 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
if ( i_error )
{
msg_Err( p_vout, "FT_Load_Glyph returned %d", i_error );
return VLC_EGENERIC;
goto error;
}
i_error = FT_Get_Glyph( glyph, &tmp_glyph );
if ( i_error )
{
msg_Err( p_vout, "FT_Get_Glyph returned %d", i_error );
return VLC_EGENERIC;
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,
......@@ -601,6 +621,14 @@ static int AddText ( vout_thread_t *p_vout, byte_t *psz_string,
p_string->i_y_margin, i_start, i_stop );
vout_DisplaySubPicture( p_vout, p_subpic );
return VLC_SUCCESS;
#undef face
#undef glyph
error:
FreeString( p_subpic );
vout_DestroySubPicture( p_vout, p_subpic );
return VLC_EGENERIC;
}
static void FreeString( subpicture_t *p_subpic )
......@@ -608,6 +636,9 @@ static void FreeString( subpicture_t *p_subpic )
unsigned int i;
subpicture_sys_t *p_string = p_subpic->p_sys;
line_desc_t *p_line, *p_next;
if( p_subpic->p_sys == NULL ) return;
for( p_line = p_string->p_lines; p_line != NULL; p_line = p_next )
{
p_next = p_line->p_next;
......@@ -668,27 +699,10 @@ static int GetUnicodeCharFromUTF8( byte_t **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) );
int i_count;
line_desc_t *p_line = malloc( sizeof(line_desc_t) );
if( !p_line )
{
return NULL;
......@@ -696,17 +710,26 @@ static line_desc_t *NewLine( byte_t *psz_string )
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( psz_string );
p_line->pp_glyphs = malloc( sizeof(FT_BitmapGlyph)
* ( CountUtf8Characters( psz_string ) + 1 ) );
* ( i_count + 1 ) );
if( p_line->pp_glyphs == NULL )
{
free( p_line );
return NULL;
}
p_line->p_glyph_pos = malloc( sizeof( FT_Vector )
* CountUtf8Characters( psz_string ) );
* i_count + 1 );
if( p_line->p_glyph_pos == NULL )
{
free( p_line->pp_glyphs );
free( p_line );
return NULL;
}
return p_line;
}
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