Fix antialiasing
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edd9a84c36
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@ -52,7 +52,7 @@ dense_move_to( const FT_Vector* to, dense_worker* worker )
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static int
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static int
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dense_line_to( const FT_Vector* to, dense_worker* worker )
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dense_line_to( const FT_Vector* to, dense_worker* worker )
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{
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{
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// printf( "dense_line_to: %d, %d\n", to->x, to->y );
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//printf( "dense_line_to: %d, %d\n", to->x, to->y );
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dense_render_line( worker, UPSCALE( to->x ), UPSCALE( to->y ) );
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dense_render_line( worker, UPSCALE( to->x ), UPSCALE( to->y ) );
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dense_move_to( to, worker );
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dense_move_to( to, worker );
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return 0;
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return 0;
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@ -76,6 +76,8 @@ swapold( unsigned char* a, unsigned char* b )
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void
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void
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dense_render_line( dense_worker* worker, TPos to_x, TPos to_y )
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dense_render_line( dense_worker* worker, TPos to_x, TPos to_y )
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{
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{
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// printf("line from: %d, %d to %d, %d\n", worker->prev_x, worker->prev_y,
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// to_x, to_y);
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TPos from_x = worker->prev_x;
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TPos from_x = worker->prev_x;
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TPos from_y = worker->prev_y;
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TPos from_y = worker->prev_y;
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if ( from_y == to_y )
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if ( from_y == to_y )
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@ -238,6 +240,7 @@ dense_conic_to( const FT_Vector* control,
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const FT_Vector* to,
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const FT_Vector* to,
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dense_worker* worker )
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dense_worker* worker )
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{
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{
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//printf( "dense_conic_to: %d, %d\n", to->x, to->y );
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dense_render_quadratic( worker, control, to );
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dense_render_quadratic( worker, control, to );
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return 0;
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return 0;
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}
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}
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@ -259,9 +262,9 @@ dense_render_quadratic( dense_worker* worker,
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The division by four is omitted to save time.
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The division by four is omitted to save time.
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*/
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*/
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FT_Vector aP0 = { worker->prev_x, worker->prev_y };
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FT_Vector aP0 = { DOWNSCALE( worker->prev_x ), DOWNSCALE( worker->prev_y ) };
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FT_Vector aP1 = { UPSCALE( control->x ), UPSCALE( control->y ) };
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FT_Vector aP1 = { control->x, control->y };
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FT_Vector aP2 = { UPSCALE( to->x ), UPSCALE( to->y ) };
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FT_Vector aP2 = { to->x, to->y };
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float devx = aP0.x - aP1.x - aP1.x + aP2.x;
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float devx = aP0.x - aP1.x - aP1.x + aP2.x;
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float devy = aP0.y - aP1.y - aP1.y + aP2.y;
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float devy = aP0.y - aP1.y - aP1.y + aP2.y;
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@ -269,9 +272,7 @@ dense_render_quadratic( dense_worker* worker,
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if ( devsq < 0.333f )
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if ( devsq < 0.333f )
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{
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{
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dense_render_line( worker, aP2.x, aP2.y );
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dense_line_to( &aP2, worker );
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worker->prev_x = aP2.x;
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worker->prev_y = aP2.y;
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return;
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return;
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}
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}
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@ -285,24 +286,23 @@ dense_render_quadratic( dense_worker* worker,
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expected to be 33% more in the limit".
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expected to be 33% more in the limit".
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*/
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*/
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const float tol = 3.0f;
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const float tol = 3.0f;
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int n = (int)floor( sqrt( sqrt( tol * devsq ) ) );
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int n = (int)floor( sqrt( sqrt( tol * devsq ) ) )/8;
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FT_Vector p = aP0;
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//printf( "n is %d\n", n );
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float nrecip = 1.0f / ( n + 1.0f );
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FT_Vector p = aP0;
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float t = 0.0f;
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float nrecip = 1.0f / ( n + 1.0f );
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float t = 0.0f;
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for ( int i = 0; i < n; i++ )
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for ( int i = 0; i < n; i++ )
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{
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{
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t += nrecip;
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t += nrecip;
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FT_Vector next = Lerp( t, Lerp( t, aP0, aP1 ), Lerp( t, aP1, aP2 ) );
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FT_Vector next = Lerp( t, Lerp( t, aP0, aP1 ), Lerp( t, aP1, aP2 ) );
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dense_render_line( worker, next.x, next.y );
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dense_line_to(&next, worker );
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worker->prev_x = next.x;
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worker->prev_y = next.y;
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p = next;
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p = next;
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}
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}
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dense_render_line( worker, aP2.x, aP2.y );
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dense_line_to( &aP2, worker );
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worker->prev_x = aP2.x;
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// worker->prev_x = aP2.x;
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worker->prev_y = aP2.y;
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// worker->prev_y = aP2.y;
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}
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}
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static int
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static int
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@ -375,7 +375,6 @@ dense_raster_new( FT_Memory memory, dense_PRaster* araster )
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static void
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static void
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dense_raster_done( FT_Raster raster )
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dense_raster_done( FT_Raster raster )
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{
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{
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FT_Memory memory = (FT_Memory)( (dense_PRaster)raster )->memory;
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FT_Memory memory = (FT_Memory)( (dense_PRaster)raster )->memory;
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FT_FREE( raster );
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FT_FREE( raster );
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@ -455,11 +454,10 @@ dense_render_glyph( dense_worker* worker, const FT_Bitmap* target )
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static int
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static int
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dense_raster_render( FT_Raster raster, const FT_Raster_Params* params )
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dense_raster_render( FT_Raster raster, const FT_Raster_Params* params )
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{
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{
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const FT_Outline* outline = (const FT_Outline*)params->source;
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const FT_Outline* outline = (const FT_Outline*)params->source;
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const FT_Bitmap* target_map = params->target;
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const FT_Bitmap* target_map = params->target;
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//dense_worker* worker = malloc( sizeof( dense_worker ) );
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// dense_worker* worker = malloc( sizeof( dense_worker ) );
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dense_worker worker[1];
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dense_worker worker[1];
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if ( !raster )
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if ( !raster )
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@ -54,6 +54,7 @@ ft_dense_render( FT_Renderer render,
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FT_Render_Mode mode,
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FT_Render_Mode mode,
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const FT_Vector* origin )
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const FT_Vector* origin )
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{
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{
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// printf("ft_dense_render\n");
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FT_Error error = FT_Err_Ok;
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FT_Error error = FT_Err_Ok;
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FT_Outline* outline = &slot->outline;
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FT_Outline* outline = &slot->outline;
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FT_Bitmap* bitmap = &slot->bitmap;
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FT_Bitmap* bitmap = &slot->bitmap;
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