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Commit 844164e3 authored by Gildas Bazin's avatar Gildas Bazin
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* modules/misc/freetype.c: optimized subtitles rendering a bit.

parent 621eb734
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Showing with 50 additions and 21 deletions
modules/misc/freetype.c
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......@@ -2,7 +2,7 @@
* freetype.c : Put text on the video, using freetype2
*****************************************************************************
* Copyright (C) 2002, 2003 VideoLAN
* $Id: freetype.c,v 1.41 2004/01/25 22:16:51 rocky Exp $
* $Id$
*
* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
*
......@@ -338,26 +338,25 @@ static void Render( vout_thread_t *p_vout, picture_t *p_pic,
* Draw a string on a i420 (or similar) picture
*/
static void RenderI420( vout_thread_t *p_vout, picture_t *p_pic,
const subpicture_t *p_subpic )
const subpicture_t *p_subpic )
{
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( 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 )
{
for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
{
uint8_t *p_in;
uint8_t *p_in = p_pic->p[ i_plane ].p_pixels;
int i_pic_pitch = p_pic->p[ i_plane ].i_pitch;
int i_pic_width = p_pic->p[ i_plane ].i_visible_pitch;
p_in = p_pic->p[ i_plane ].p_pixels;
if ( i_plane == 0 )
if( i_plane == 0 )
{
if ( p_string->i_flags & OSD_ALIGN_BOTTOM )
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;
......@@ -367,12 +366,13 @@ static void RenderI420( vout_thread_t *p_vout, picture_t *p_pic,
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 )
if( p_string->i_flags & OSD_ALIGN_RIGHT )
{
pen_x = i_pic_width - p_line->i_width
- p_string->i_x_margin;
}
else if ( p_string->i_flags & OSD_ALIGN_LEFT )
else if( p_string->i_flags & OSD_ALIGN_LEFT )
{
pen_x = p_string->i_x_margin;
}
......@@ -385,30 +385,49 @@ static void RenderI420( vout_thread_t *p_vout, picture_t *p_pic,
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_line->p_glyph_pos[ i ].y + pen_y + y - p_glyph->top ) * i_pic_pitch + x + pen_x + p_line->p_glyph_pos[ i ].x + p_glyph->left ]
for(y = 0; y < p_glyph->bitmap.rows; y++ )
int i_alpha_offset = -1;
int i_offset = ( p_line->p_glyph_pos[ i ].y + pen_y -
p_glyph->top ) * i_pic_pitch +
p_line->p_glyph_pos[ i ].x + p_glyph->left;
#define alpha p_vout->p_text_renderer_data->pi_gamma[ p_glyph->bitmap.buffer[ i_alpha_offset ] ]
#define pixel p_in[ i_offset + x + pen_x ]
for( y = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++ )
{
pen_y--;
i_alpha_offset++;
if( alpha == 0 ) continue;
pen_y--; i_offset -= i_pic_pitch;
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 );
pen_y++; pen_x--;
pen_y++; i_offset += i_pic_pitch; pen_x--;
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 );
pen_x += 2;
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 );
pen_y++; pen_x--;
pen_y++; i_offset += i_pic_pitch; pen_x--;
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 );
pen_y--;
pen_y--; i_offset -= i_pic_pitch;
}
i_offset += i_pic_pitch;
}
for(y = 0; y < p_glyph->bitmap.rows; y++ )
i_alpha_offset = -1;
i_offset = ( p_line->p_glyph_pos[ i ].y + pen_y -
p_glyph->top ) * i_pic_pitch +
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++ )
{
i_alpha_offset++;
if( alpha == 0 ) continue;
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 ) +
( 255 * alpha >> 8 );
}
i_offset += i_pic_pitch;
}
#undef alpha
#undef pixel
......@@ -418,8 +437,8 @@ static void RenderI420( vout_thread_t *p_vout, picture_t *p_pic,
{
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);
pen_y = p_pic->p[i_plane].i_lines - (p_string->i_height>>1)
- (p_string->i_y_margin>>1);
}
else
{
......@@ -450,6 +469,8 @@ static void RenderI420( vout_thread_t *p_vout, picture_t *p_pic,
{
for( x = 0; x < p_glyph->bitmap.width; x+=2 )
{
if( alpha == 0 ) continue;
pixel = ( ( pixel * ( 0xFF - alpha ) ) >> 8 ) +
( 0x80 * alpha >> 8 );
#undef alpha
......@@ -515,6 +536,8 @@ static void RenderYUY2( vout_thread_t *p_vout, picture_t *p_pic,
{
for( x = 0; x < p_glyph->bitmap.width; x++ )
{
if( alpha == 0 ) continue;
pen_y--;
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 );
pen_y++; pen_x--;
......@@ -530,6 +553,8 @@ static void RenderYUY2( vout_thread_t *p_vout, picture_t *p_pic,
{
for( x = 0; x < p_glyph->bitmap.width; x++ )
{
if( alpha == 0 ) continue;
pixel = ( ( pixel * ( 255 - alpha ) ) >> 8 ) +
( 255 * alpha >> 8 );
}
......@@ -595,6 +620,8 @@ static void RenderRV32( vout_thread_t *p_vout, picture_t *p_pic,
{
for( x = 0; x < p_glyph->bitmap.width; x++ )
{
if( alpha == 0 ) continue;
pen_y--;
pixel( 0 ) = ( ( pixel( 0 ) * ( 255 - alpha ) ) >> 8 );
pixel( 1 ) = ( ( pixel( 1 ) * ( 255 - alpha ) ) >> 8 );
......@@ -618,6 +645,8 @@ static void RenderRV32( vout_thread_t *p_vout, picture_t *p_pic,
{
for( x = 0; x < p_glyph->bitmap.width; x++ )
{
if( alpha == 0 ) continue;
pixel( 0 ) = ( ( pixel( 0 ) * ( 255 - alpha ) ) >> 8 ) +
( 255 * alpha >> 8 );
pixel( 1 ) = ( ( pixel( 1 ) * ( 255 - alpha ) ) >> 8 ) +
......
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