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Sequencer: Try to avoid excessive double buffer flips when the transport is rolling.

This commit is contained in:
Jonathan Moore Liles 2012-03-13 19:50:17 -07:00
parent e1495ba425
commit c74cd04bab
3 changed files with 13 additions and 1 deletions
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7
sequencer/src/canvas.C
View File

@ -483,6 +483,13 @@ Canvas::draw_line ( int x, int flags )
m.current[ x ][ y ].flags |= flags; m.current[ x ][ y ].flags |= flags;
} }
int
Canvas::playhead_moved ( void )
{
int x = m.grid->ts_to_x( m.grid->index() );
return m.playhead != x;
}
/** draw only the playhead--without reexamining the grid */ /** draw only the playhead--without reexamining the grid */
int int

1
sequencer/src/canvas.H
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@ -157,6 +157,7 @@ public:
void notes ( char *s ); void notes ( char *s );
char * notes ( void ); char * notes ( void );
void randomize_row ( int y ); void randomize_row ( int y );
int playhead_moved ( void );
void start_cursor ( int x, int y ); void start_cursor ( int x, int y );
void end_cursor ( int x, int y ); void end_cursor ( int x, int y );

6
sequencer/src/gui/ui.fl
View File

@ -1591,7 +1591,11 @@ _flags |= FL_DAMAGE_SCROLL;} {}
} }
Function {draw_playhead( void )} {open return_type void Function {draw_playhead( void )} {open return_type void
} { } {
code {damage( FL_DAMAGE_USER1 );} {} code {
if ( _c && _c->playhead_moved() )
{
damage( FL_DAMAGE_USER1 );
}} {}
} }
Function {draw_border()} {open return_type void Function {draw_border()} {open return_type void
} { } {