mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-10-31 17:21:34 +01:00
947 lines
20 KiB
ObjectPascal
947 lines
20 KiB
ObjectPascal
//
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// AggPas 2.4 RM3 Demo application
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// Note: Press F1 key on run to see more info about this demo
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//
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// Paths: src;src\ctrl;src\svg;src\util;src\platform\win;expat-wrap
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//
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program
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scanline_boolean2 ;
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uses
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SysUtils ,
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agg_basics ,
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agg_platform_support ,
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agg_color ,
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agg_pixfmt ,
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agg_pixfmt_rgb ,
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agg_ctrl ,
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agg_slider_ctrl ,
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agg_cbox_ctrl ,
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agg_rbox_ctrl ,
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agg_rendering_buffer ,
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agg_renderer_base ,
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agg_renderer_scanline ,
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agg_renderer_primitives ,
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agg_rasterizer_scanline_aa ,
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agg_scanline ,
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agg_scanline_u ,
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agg_scanline_p ,
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agg_scanline_bin ,
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agg_scanline_storage_aa ,
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agg_scanline_storage_bin ,
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agg_scanline_boolean_algebra ,
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agg_render_scanlines ,
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agg_math_stroke ,
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agg_path_storage ,
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agg_span_solid ,
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agg_conv_curve ,
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agg_conv_stroke ,
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agg_conv_transform ,
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agg_gsv_text ,
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agg_trans_affine ,
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agg_vertex_source ,
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make_gb_poly_ ,
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make_arrows_ ;
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{$I agg_mode.inc }
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const
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flip_y = true;
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type
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spiral = object(vertex_source )
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m_x ,
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m_y ,
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m_r1 ,
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m_r2 ,
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m_step ,
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m_start_angle ,
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m_angle ,
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m_curr_r ,
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m_da ,
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m_dr : double;
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m_start : boolean;
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constructor Construct(x ,y ,r1 ,r2 ,step : double; start_angle : double = 0 );
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procedure rewind(path_id : unsigned ); virtual;
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function vertex(x ,y : double_ptr ) : unsigned; virtual;
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end;
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the_application = object(platform_support )
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m_polygons ,
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m_fill_rule ,
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m_scanline_type ,
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m_operation : rbox_ctrl;
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m_x ,
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m_y : double;
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constructor Construct(format_ : pix_format_e; flip_y_ : boolean );
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destructor Destruct;
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procedure render_scanline_boolean(ras1 ,ras2 : rasterizer_scanline_ptr );
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function render_sbool (ras1 ,ras2 : rasterizer_scanline_ptr ) : unsigned;
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procedure on_init; virtual;
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procedure on_draw; virtual;
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procedure on_mouse_move (x ,y : int; flags : unsigned ); virtual;
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procedure on_mouse_button_down(x ,y : int; flags : unsigned ); virtual;
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procedure on_key(x ,y : int; key ,flags : unsigned ); virtual;
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end;
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{ CONSTRUCT }
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constructor spiral.Construct;
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begin
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m_x :=x;
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m_y :=y;
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m_r1:=r1;
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m_r2:=r2;
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m_step :=step;
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m_start_angle:=start_angle;
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m_angle :=start_angle;
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m_da:=deg2rad(4.0 );
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m_dr:=m_step / 90.0;
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end;
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{ REWIND }
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procedure spiral.rewind;
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begin
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m_angle :=m_start_angle;
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m_curr_r:=m_r1;
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m_start :=true;
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end;
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{ VERTEX }
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function spiral.vertex;
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begin
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if m_curr_r > m_r2 then
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begin
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result:=path_cmd_stop;
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exit;
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end;
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x^:=m_x + Cos(m_angle ) * m_curr_r;
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y^:=m_y + Sin(m_angle ) * m_curr_r;
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m_curr_r:=m_curr_r + m_dr;
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m_angle :=m_angle + m_da;
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if m_start then
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begin
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m_start:=false;
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result:=path_cmd_move_to;
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end
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else
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result:=path_cmd_line_to;
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end;
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{ COUNT_SPANS }
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function count_spans(ras : rasterizer_scanline_ptr; sl : scanline_ptr ) : unsigned;
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var
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n : unsigned;
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begin
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n:=0;
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if ras.rewind_scanlines then
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begin
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sl.reset(ras._min_x ,ras._max_x );
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if sl.is_embedded then
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while ras.sweep_scanline_em(sl ) do
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inc(n ,sl.num_spans )
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else
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while ras.sweep_scanline(sl ) do
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inc(n ,sl.num_spans );
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end;
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result:=n;
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end;
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{ CONSTRUCT }
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constructor the_application.Construct;
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begin
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inherited Construct(format_ ,flip_y_ );
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m_polygons.Construct (5.0 ,5.0 ,5.0 + 205.0 ,110.0 ,not flip_y_ );
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m_fill_rule.Construct (200 ,5.0 ,200 + 105.0 ,50.0 ,not flip_y_ );
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m_scanline_type.Construct(300 ,5.0 ,300 + 115.0 ,70.0 ,not flip_y_ );
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m_operation.Construct (535.0 ,5.0 ,535.0 + 115.0 ,145.0 ,not flip_y_ );
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m_operation.add_item ('None' );
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m_operation.add_item ('OR' );
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m_operation.add_item ('AND' );
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m_operation.add_item ('XOR Linear' );
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m_operation.add_item ('XOR Saddle' );
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m_operation.add_item ('A-B' );
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m_operation.add_item ('B-A' );
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m_operation.cur_item_(2 );
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add_ctrl(@m_operation );
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m_operation.no_transform;
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m_fill_rule.add_item ('Even-Odd' );
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m_fill_rule.add_item ('Non Zero' );
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m_fill_rule.cur_item_(1 );
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add_ctrl(@m_fill_rule );
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m_fill_rule.no_transform;
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m_scanline_type.add_item ('scanline_p' );
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m_scanline_type.add_item ('scanline_u' );
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m_scanline_type.add_item ('scanline_bin' );
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m_scanline_type.cur_item_(1 );
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add_ctrl(@m_scanline_type );
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m_scanline_type.no_transform;
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m_polygons.add_item ('Two Simple Paths' );
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m_polygons.add_item ('Closed Stroke' );
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m_polygons.add_item ('Great Britain and Arrows' );
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m_polygons.add_item ('Great Britain and Spiral' );
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m_polygons.add_item ('Spiral and Glyph' );
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m_polygons.cur_item_(3 );
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add_ctrl(@m_polygons );
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m_polygons.no_transform;
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end;
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{ DESTRUCT }
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destructor the_application.Destruct;
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begin
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inherited Destruct;
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m_polygons.Destruct;
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m_fill_rule.Destruct;
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m_scanline_type.Destruct;
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m_operation.Destruct;
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end;
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{ RENDER_SCANLINE_BOOLEAN }
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procedure the_application.render_scanline_boolean;
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var
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op : sbool_op_e;
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rb : renderer_base;
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buf : array[0..99 ] of char;
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pixf : pixel_formats;
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rgba : aggclr;
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t1 ,t2 : double;
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i : int;
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num_spans : unsigned;
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renp ,
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renu ,
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rent : renderer_scanline_aa_solid;
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renb : renderer_scanline_bin_solid;
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slt ,
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slp ,
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slp1 ,
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slp2 : scanline_p8;
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slu ,
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slu1 ,
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slu2 : scanline_u8;
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slb ,
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slb1 ,
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slb2 : scanline_bin;
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txt : gsv_text;
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txt_stroke : conv_stroke;
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storage ,
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storage1 ,
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storage2 : scanline_storage_aa8;
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storageb ,
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storageb1 ,
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storageb2 : scanline_storage_bin;
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begin
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if m_operation._cur_item > 0 then
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begin
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case m_operation._cur_item of
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1 : op:=sbool_or;
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2 : op:=sbool_and;
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3 : op:=sbool_xor;
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4 : op:=sbool_xor_saddle;
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5 : op:=sbool_a_minus_b;
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6 : op:=sbool_b_minus_a;
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end;
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pixfmt_bgr24(pixf ,rbuf_window );
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rb.Construct(@pixf );
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t1:=0.0;
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t2:=0.0;
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num_spans:=0;
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// Render Clipping
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case m_scanline_type._cur_item of
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0 :
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begin
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renp.Construct(@rb );
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slp.Construct;
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slp1.Construct;
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slp2.Construct;
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// The intermediate storage is used only to test the perfoprmance,
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// the short variant can be as follows:
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// ------------------------
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// rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 );
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// renp.color (@rgba );
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// sbool_combine_shapes_aa(op ,ras1 ,ras2 ,@slp1 ,@slp2 ,@slp ,@renp );
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storage.Construct;
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storage1.Construct;
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storage2.Construct;
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render_scanlines(ras1 ,@slp ,@storage1 );
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render_scanlines(ras2 ,@slp ,@storage2 );
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start_timer;
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for i:=0 to 9 do
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sbool_combine_shapes_aa(op ,@storage1 ,@storage2 ,@slp1 ,@slp2 ,@slp ,@storage );
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t1:=elapsed_time / 10.0;
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start_timer;
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rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 );
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renp.color_ (@rgba );
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render_scanlines(@storage ,@slp ,@renp );
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t2:=elapsed_time;
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num_spans:=count_spans(@storage ,@slp );
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slp.Destruct;
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slp1.Destruct;
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slp2.Destruct;
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storage.Destruct;
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storage1.Destruct;
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storage2.Destruct;
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end;
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1 :
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begin
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renu.Construct(@rb );
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slu.Construct;
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slu1.Construct;
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slu2.Construct;
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{rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 );
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renu.color (@rgba );
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sbool_combine_shapes_aa(op ,ras1 ,ras2 ,@slu1 ,@slu2 ,@slu ,@renu );}
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storage.Construct;
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storage1.Construct;
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storage2.Construct;
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render_scanlines(ras1 ,@slu ,@storage1 );
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render_scanlines(ras2 ,@slu ,@storage2 );
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start_timer;
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for i:=0 to 9 do
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sbool_combine_shapes_aa(op ,@storage1 ,@storage2 ,@slu1 ,@slu2 ,@slu ,@storage );
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t1:=elapsed_time / 10.0;
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start_timer;
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rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 );
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renu.color_ (@rgba );
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render_scanlines(@storage ,@slu ,@renu );
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t2:=elapsed_time;
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num_spans:=count_spans(@storage ,@slu );{}
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slu.Destruct;
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slu1.Destruct;
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slu2.Destruct;
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storage.Destruct;
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storage1.Destruct;
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storage2.Destruct;{}
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end;
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2 :
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begin
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renb.Construct(@rb );
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slb.Construct;
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slb1.Construct;
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slb2.Construct;
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storageb.Construct;
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storageb1.Construct;
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storageb2.Construct;
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render_scanlines(ras1 ,@slb ,@storageb1 );
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render_scanlines(ras2 ,@slb ,@storageb2 );
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start_timer;
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for i:=0 to 9 do
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sbool_combine_shapes_bin(op ,@storageb1 ,@storageb2 ,@slb1 ,@slb2 ,@slb ,@storageb );
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t1:=elapsed_time / 10.0;
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start_timer;
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rgba.ConstrDbl ({0.5}1 ,0.0 ,0 {,0.5} );
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renb.color_ (@rgba );
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render_scanlines(@storageb ,@slb ,@renb );
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t2:=elapsed_time;
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num_spans:=count_spans(@storageb ,@slb );
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slb.Destruct;
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slb1.Destruct;
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slb2.Destruct;
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storageb.Destruct;
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storageb1.Destruct;
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storageb2.Destruct;
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end;
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end;
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// Render text
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sprintf(@buf[0 ] ,'Combine=%.3fms'#13#13 ,t1 );
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sprintf(@buf[StrLen(@buf ) ] ,'Render=%.3fms'#13#13 ,t2 );
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sprintf(@buf[StrLen(@buf ) ] ,'num_spans=%d' ,num_spans );
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rent.Construct(@rb );
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slt.Construct;
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txt.Construct;
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txt_stroke.Construct(@txt );
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txt_stroke.width_ (1.0 );
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txt_stroke.line_cap_(round_cap );
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txt.size_ (8.0 );
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txt.start_point_ (420 ,40 );
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txt.text_ (@buf[0 ] );
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ras1.reset;
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ras1.add_path (@txt_stroke );
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rgba.ConstrDbl (0.0 ,0.0 ,0.0 );
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rent.color_ (@rgba );
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render_scanlines(ras1 ,@slt ,@rent );
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slt.Destruct;
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txt.Destruct;
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txt_stroke.Destruct;
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end;
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end;
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{ RENDER_SBOOL }
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function the_application.render_sbool;
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var
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pf : pixel_formats;
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rb : renderer_base;
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ren : renderer_scanline_aa_solid;
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sl : scanline_p8;
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ps1 ,
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ps2 ,
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gb_poly ,
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arrows ,
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glyph : path_storage;
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rgba : aggclr;
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x ,y : double;
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mtx1 ,
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mtx2 ,
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mtx : trans_affine;
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tat : trans_affine_translation;
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tas : trans_affine_scaling;
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stroke ,
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stroke_gb_poly : conv_stroke;
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trans ,
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trans_gb_poly ,
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trans_arrows : conv_transform;
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curve : conv_curve;
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sp : spiral;
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begin
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pixfmt_bgr24(pf ,rbuf_window );
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rb.Construct (@pf );
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ren.Construct(@rb );
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sl.Construct;
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if m_fill_rule._cur_item <> 0 then
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ras1.filling_rule(fill_non_zero )
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else
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ras1.filling_rule(fill_even_odd );
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if m_fill_rule._cur_item <> 0 then
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ras2.filling_rule(fill_non_zero )
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else
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ras2.filling_rule(fill_even_odd );
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case m_polygons._cur_item of
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0 : // Two simple paths
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begin
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ps1.Construct;
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ps2.Construct;
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x:=m_x - _initial_width / 2 + 100;
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y:=m_y - _initial_height / 2 + 100;
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ps1.move_to(x + 140 ,y + 145 );
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ps1.line_to(x + 225 ,y + 44 );
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ps1.line_to(x + 296 ,y + 219 );
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ps1.close_polygon;
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ps1.line_to(x + 226 ,y + 289 );
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ps1.line_to(x + 82 ,y + 292 );
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ps1.move_to(x + 220 ,y + 222 );
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ps1.line_to(x + 363 ,y + 249 );
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ps1.line_to(x + 265 ,y + 331 );
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ps1.move_to(x + 242 ,y + 243 );
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ps1.line_to(x + 268 ,y + 309 );
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ps1.line_to(x + 325 ,y + 261 );
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ps1.move_to(x + 259 ,y + 259 );
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ps1.line_to(x + 273 ,y + 288 );
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ps1.line_to(x + 298 ,y + 266 );
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ps2.move_to(100 + 32 ,100 + 77 );
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ps2.line_to(100 + 473 ,100 + 263 );
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ps2.line_to(100 + 351 ,100 + 290 );
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ps2.line_to(100 + 354 ,100 + 374 );
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ras1.reset;
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ras1.add_path (@ps1 );
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rgba.ConstrDbl (0 ,0 ,0 ,{0.1}0.0 );
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ren.color_ (@rgba );
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{ render_scanlines(ras1 ,@sl ,@ren ); }
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|
|
ras2.reset;
|
|
ras2.add_path (@ps2 );
|
|
rgba.ConstrDbl (0 ,0.6 ,0 ,{0.1}0.0 );
|
|
ren.color_ (@rgba );
|
|
{ render_scanlines(ras2 ,@sl ,@ren ); }
|
|
|
|
render_scanline_boolean(ras1 ,ras2 );
|
|
|
|
ps1.Destruct;
|
|
ps2.Destruct;
|
|
|
|
end;
|
|
|
|
1 : // Closed stroke
|
|
begin
|
|
ps1.Construct;
|
|
ps2.Construct;
|
|
stroke.Construct(@ps2 );
|
|
stroke.width_ (15.0 );
|
|
|
|
x:=m_x - _initial_width / 2 + 100;
|
|
y:=m_y - _initial_height / 2 + 100;
|
|
|
|
ps1.move_to(x + 140 ,y + 145 );
|
|
ps1.line_to(x + 225 ,y + 44 );
|
|
ps1.line_to(x + 296 ,y + 219 );
|
|
ps1.close_polygon;
|
|
|
|
ps1.line_to(x + 226 ,y + 289 );
|
|
ps1.line_to(x + 82 ,y + 292 );
|
|
|
|
ps1.move_to(x + 220 - 50 ,y + 222 );
|
|
ps1.line_to(x + 265 - 50 ,y + 331 );
|
|
ps1.line_to(x + 363 - 50 ,y + 249 );
|
|
ps1.close_polygon(path_flags_ccw );
|
|
|
|
ps2.move_to(100 + 32 ,100 + 77 );
|
|
ps2.line_to(100 + 473 ,100 + 263 );
|
|
ps2.line_to(100 + 351 ,100 + 290 );
|
|
ps2.line_to(100 + 354 ,100 + 374 );
|
|
ps2.close_polygon;
|
|
|
|
ras1.reset;
|
|
ras1.add_path (@ps1 );
|
|
rgba.ConstrDbl (0 ,0 ,0 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras1 ,@sl ,@ren );
|
|
|
|
ras2.reset;
|
|
ras2.add_path (@stroke );
|
|
rgba.ConstrDbl (0 ,0.6 ,0 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras2 ,@sl ,@ren );
|
|
|
|
render_scanline_boolean(ras1 ,ras2 );
|
|
|
|
ps1.Destruct;
|
|
ps2.Destruct;
|
|
stroke.Destruct;
|
|
|
|
end;
|
|
|
|
2 : // Great Britain and Arrows
|
|
begin
|
|
gb_poly.Construct;
|
|
arrows.Construct;
|
|
|
|
make_gb_poly(@gb_poly );
|
|
make_arrows (@arrows );
|
|
|
|
mtx1.Construct;
|
|
mtx2.Construct;
|
|
tat.Construct(-1150 ,-1150 );
|
|
tas.Construct(2.0 );
|
|
mtx1.multiply(@tat );
|
|
mtx1.multiply(@tas );
|
|
|
|
mtx2:=mtx1;
|
|
|
|
tat.Construct(m_x - _initial_width / 2 ,m_y - _initial_height / 2 );
|
|
|
|
mtx2.multiply(@tat );
|
|
|
|
trans_gb_poly.Construct(@gb_poly ,@mtx1 );
|
|
trans_arrows.Construct (@arrows ,@mtx2 );
|
|
|
|
ras2.add_path (@trans_gb_poly );
|
|
rgba.ConstrDbl (0.5 ,0.5 ,0 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras2 ,@sl ,@ren );
|
|
|
|
stroke_gb_poly.Construct(@trans_gb_poly );
|
|
stroke_gb_poly.width_ (0.1);
|
|
ras1.add_path (@stroke_gb_poly );
|
|
rgba.ConstrDbl (0 ,0 ,0 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines (ras1 ,@sl ,@ren );
|
|
|
|
ras2.add_path (@trans_arrows );
|
|
rgba.ConstrDbl (0.0 ,0.5 ,0.5 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras2 ,@sl ,@ren );
|
|
|
|
ras1.reset;
|
|
ras1.add_path(@trans_gb_poly );
|
|
|
|
render_scanline_boolean(ras1 ,ras2 );
|
|
|
|
gb_poly.Destruct;
|
|
arrows.Destruct;
|
|
stroke_gb_poly.Destruct;
|
|
|
|
end;
|
|
|
|
3 : // Great Britain and a Spiral
|
|
begin
|
|
sp.Construct (m_x ,m_y ,10 ,150 ,30 ,0.0 );
|
|
stroke.Construct(@sp );
|
|
stroke.width_ (15.0 );
|
|
|
|
gb_poly.Construct;
|
|
make_gb_poly(@gb_poly );
|
|
|
|
mtx.Construct;
|
|
tat.Construct(-1150 ,-1150 );
|
|
tas.Construct(2.0 );
|
|
mtx.multiply(@tat );
|
|
mtx.multiply(@tas );
|
|
mtx.multiply(_trans_affine_resizing );
|
|
|
|
trans_gb_poly.Construct(@gb_poly ,@mtx );
|
|
|
|
ras1.add_path (@trans_gb_poly );
|
|
rgba.ConstrDbl (0.5 ,0.5 ,0 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras1 ,@sl ,@ren );
|
|
|
|
stroke_gb_poly.Construct(@trans_gb_poly );
|
|
stroke_gb_poly.width_ (0.1 );
|
|
ras1.add_path (@stroke_gb_poly );
|
|
rgba.ConstrDbl (0 ,0 ,0 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines (ras1 ,@sl ,@ren );
|
|
|
|
ras2.reset;
|
|
ras2.add_path (@stroke );
|
|
rgba.ConstrDbl (0.0 ,0.5 ,0.5 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras2 ,@sl ,@ren );
|
|
|
|
ras1.reset;
|
|
ras1.add_path(@trans_gb_poly );
|
|
|
|
render_scanline_boolean(ras1 ,ras2 );
|
|
|
|
stroke.Destruct;
|
|
gb_poly.Destruct;
|
|
stroke_gb_poly.Destruct;
|
|
|
|
end;
|
|
|
|
4 : // Spiral and glyph
|
|
begin
|
|
sp.Construct (m_x ,m_y ,10 ,150 ,30 ,0.0 );
|
|
stroke.Construct(@sp );
|
|
stroke.width_ (15.0 );
|
|
|
|
glyph.Construct;
|
|
glyph.move_to(28.47 ,6.45 );
|
|
glyph.curve3 (21.58 ,1.12 ,19.82 ,0.29 );
|
|
glyph.curve3 (17.19 ,-0.93 ,14.21 ,-0.93 );
|
|
glyph.curve3 (9.57 ,-0.93 ,6.57 ,2.25 );
|
|
glyph.curve3 (3.56 ,5.42 ,3.56 ,10.60 );
|
|
glyph.curve3 (3.56 ,13.87 ,5.03 ,16.26 );
|
|
glyph.curve3 (7.03 ,19.58 ,11.99 ,22.51 );
|
|
glyph.curve3 (16.94 ,25.44 ,28.47 ,29.64 );
|
|
glyph.line_to(28.47 ,31.40 );
|
|
glyph.curve3 (28.47 ,38.09 ,26.34 ,40.58 );
|
|
glyph.curve3 (24.22 ,43.07 ,20.17 ,43.07 );
|
|
glyph.curve3 (17.09 ,43.07 ,15.28 ,41.41 );
|
|
glyph.curve3 (13.43 ,39.75 ,13.43 ,37.60 );
|
|
glyph.line_to(13.53 ,34.77 );
|
|
glyph.curve3 (13.53 ,32.52 ,12.38 ,31.30 );
|
|
glyph.curve3 (11.23 ,30.08 ,9.38 ,30.08 );
|
|
glyph.curve3 (7.57 ,30.08 ,6.42 ,31.35 );
|
|
glyph.curve3 (5.27 ,32.62 ,5.27 ,34.81 );
|
|
glyph.curve3 (5.27 ,39.01 ,9.57 ,42.53 );
|
|
glyph.curve3 (13.87 ,46.04 ,21.63 ,46.04 );
|
|
glyph.curve3 (27.59 ,46.04 ,31.40 ,44.04 );
|
|
glyph.curve3 (34.28 ,42.53 ,35.64 ,39.31 );
|
|
glyph.curve3 (36.52 ,37.21 ,36.52 ,30.71 );
|
|
glyph.line_to(36.52 ,15.53 );
|
|
glyph.curve3 (36.52 ,9.13 ,36.77 ,7.69 );
|
|
glyph.curve3 (37.01 ,6.25 ,37.57 ,5.76 );
|
|
glyph.curve3 (38.13 ,5.27 ,38.87 ,5.27 );
|
|
glyph.curve3 (39.65 ,5.27 ,40.23 ,5.62 );
|
|
glyph.curve3 (41.26 ,6.25 ,44.19 ,9.18 );
|
|
glyph.line_to(44.19 ,6.45 );
|
|
glyph.curve3 (38.72 ,-0.88 ,33.74 ,-0.88 );
|
|
glyph.curve3 (31.35 ,-0.88 ,29.93 ,0.78 );
|
|
glyph.curve3 (28.52 ,2.44 ,28.47 ,6.45 );
|
|
glyph.close_polygon;
|
|
|
|
glyph.move_to(28.47 ,9.62 );
|
|
glyph.line_to(28.47 ,26.66 );
|
|
glyph.curve3 (21.09 ,23.73 ,18.95 ,22.51 );
|
|
glyph.curve3 (15.09 ,20.36 ,13.43 ,18.02 );
|
|
glyph.curve3 (11.77 ,15.67 ,11.77 ,12.89 );
|
|
glyph.curve3 (11.77 ,9.38 ,13.87 ,7.06 );
|
|
glyph.curve3 (15.97 ,4.74 ,18.70 ,4.74 );
|
|
glyph.curve3 (22.41 ,4.74 ,28.47 ,9.62 );
|
|
glyph.close_polygon;
|
|
|
|
mtx.Construct;
|
|
tas.Construct(4.0 );
|
|
tat.Construct(220 ,200 );
|
|
mtx.multiply(@tas );
|
|
mtx.multiply(@tat );
|
|
|
|
trans.Construct(@glyph ,@mtx );
|
|
curve.Construct(@trans );
|
|
|
|
ras1.reset;
|
|
ras1.add_path (@stroke );
|
|
rgba.ConstrDbl (0 ,0 ,0 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras1 ,@sl ,@ren );
|
|
|
|
ras2.reset;
|
|
ras2.add_path (@curve );
|
|
rgba.ConstrDbl (0 ,0.6 ,0 ,0.1 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(ras2 ,@sl ,@ren );
|
|
|
|
render_scanline_boolean(ras1 ,ras2 );
|
|
|
|
stroke.Destruct;
|
|
glyph.Destruct;
|
|
curve.Destruct;
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
sl.Destruct;
|
|
|
|
result:=0;
|
|
|
|
end;
|
|
|
|
{ ON_INIT }
|
|
procedure the_application.on_init;
|
|
begin
|
|
m_x:=_width / 2.0;
|
|
m_y:=_height / 2.0;
|
|
|
|
end;
|
|
|
|
{ ON_DRAW }
|
|
procedure the_application.on_draw;
|
|
var
|
|
pf : pixel_formats;
|
|
|
|
rgba : aggclr;
|
|
|
|
ren_base : renderer_base;
|
|
ren_solid : renderer_scanline_aa_solid;
|
|
|
|
sl : scanline_u8;
|
|
ras ,
|
|
ras2 : rasterizer_scanline_aa;
|
|
|
|
begin
|
|
// Initialize structures
|
|
pixfmt_bgr24(pf ,rbuf_window );
|
|
|
|
ren_base.Construct (@pf );
|
|
ren_solid.Construct(@ren_base );
|
|
|
|
rgba.ConstrDbl(1 ,1 ,1 );
|
|
ren_base.clear(@rgba );
|
|
|
|
sl.Construct;
|
|
ras.Construct;
|
|
ras2.Construct;
|
|
|
|
// Render the controls
|
|
render_ctrl(@ras ,@sl ,@ren_solid ,@m_polygons );
|
|
render_ctrl(@ras ,@sl ,@ren_solid ,@m_fill_rule );
|
|
render_ctrl(@ras ,@sl ,@ren_solid ,@m_scanline_type );
|
|
render_ctrl(@ras ,@sl ,@ren_solid ,@m_operation );
|
|
|
|
// Render
|
|
render_sbool(@ras ,@ras2 );
|
|
|
|
// Free AGG resources
|
|
sl.Destruct;
|
|
ras.Destruct;
|
|
ras2.Destruct;
|
|
|
|
end;
|
|
|
|
{ ON_MOUSE_MOVE }
|
|
procedure the_application.on_mouse_move;
|
|
begin
|
|
if flags and mouse_left <> 0 then
|
|
begin
|
|
m_x:=x;
|
|
m_y:=y;
|
|
|
|
force_redraw;
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
{ ON_MOUSE_BUTTON_DOWN }
|
|
procedure the_application.on_mouse_button_down;
|
|
var
|
|
buf : array[0..99 ] of char;
|
|
|
|
begin
|
|
if flags and mouse_left <> 0 then
|
|
begin
|
|
m_x:=x;
|
|
m_y:=y;
|
|
|
|
force_redraw;
|
|
|
|
end;
|
|
|
|
if flags and mouse_right <> 0 then
|
|
begin
|
|
sprintf (@buf[0 ] ,'%d ' ,x );
|
|
sprintf (@buf[StrLen(@buf ) ] ,'%d' ,y );
|
|
message_(@buf[0 ] );
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
{ ON_KEY }
|
|
procedure the_application.on_key;
|
|
begin
|
|
if key = key_f1 then
|
|
message_(
|
|
'This is another example of using of the scanline boolean algebra. The example is '#13 +
|
|
'similar to Demo gpc_test. Note that the cost of the boolean operation with Anti-Aliasing '#13 +
|
|
'is comparable with rendering (the rasterization time is not included). Also note that '#13 +
|
|
'there is a difference in timings between using of scanline_u and scanline_p. Most often '#13 +
|
|
'scanline_u works faster, but it''s because of much less number of produced spans.'#13 +
|
|
'Actually, when using the scanline_u the complexity of the algorithm becomes proportional '#13 +
|
|
'to the area of the polygons, while in scanline_p it''s proportional to the perimeter. '#13 +
|
|
'Of course, the binary variant works much faster than the Anti-Aliased one.' +
|
|
#13#13'Note: F2 key saves current "screenshot" file in this demo''s directory. ' );
|
|
|
|
end;
|
|
|
|
VAR
|
|
app : the_application;
|
|
|
|
BEGIN
|
|
app.Construct(pix_format_bgr24 ,flip_y );
|
|
app.caption_ ('AGG Example. Scanline Boolean (F1-Help)' );
|
|
|
|
if app.init(655 ,520 ,window_resize ) then
|
|
app.run;
|
|
|
|
app.Destruct;
|
|
|
|
END. |