// // AggPas 2.4 RM3 Demo application // Note: Press F1 key on run to see more info about this demo // // Paths: src;src\ctrl;src\svg;src\util;src\platform\win;expat-wrap // program scanline_boolean2 ; uses SysUtils , agg_basics , agg_platform_support , agg_color , agg_pixfmt , agg_pixfmt_rgb , agg_ctrl , agg_slider_ctrl , agg_cbox_ctrl , agg_rbox_ctrl , agg_rendering_buffer , agg_renderer_base , agg_renderer_scanline , agg_renderer_primitives , agg_rasterizer_scanline_aa , agg_scanline , agg_scanline_u , agg_scanline_p , agg_scanline_bin , agg_scanline_storage_aa , agg_scanline_storage_bin , agg_scanline_boolean_algebra , agg_render_scanlines , agg_math_stroke , agg_path_storage , agg_span_solid , agg_conv_curve , agg_conv_stroke , agg_conv_transform , agg_gsv_text , agg_trans_affine , agg_vertex_source , make_gb_poly_ , make_arrows_ ; {$I agg_mode.inc } const flip_y = true; type spiral = object(vertex_source ) m_x , m_y , m_r1 , m_r2 , m_step , m_start_angle , m_angle , m_curr_r , m_da , m_dr : double; m_start : boolean; constructor Construct(x ,y ,r1 ,r2 ,step : double; start_angle : double = 0 ); procedure rewind(path_id : unsigned ); virtual; function vertex(x ,y : double_ptr ) : unsigned; virtual; end; the_application = object(platform_support ) m_polygons , m_fill_rule , m_scanline_type , m_operation : rbox_ctrl; m_x , m_y : double; constructor Construct(format_ : pix_format_e; flip_y_ : boolean ); destructor Destruct; procedure render_scanline_boolean(ras1 ,ras2 : rasterizer_scanline_ptr ); function render_sbool (ras1 ,ras2 : rasterizer_scanline_ptr ) : unsigned; procedure on_init; virtual; procedure on_draw; virtual; procedure on_mouse_move (x ,y : int; flags : unsigned ); virtual; procedure on_mouse_button_down(x ,y : int; flags : unsigned ); virtual; procedure on_key(x ,y : int; key ,flags : unsigned ); virtual; end; { CONSTRUCT } constructor spiral.Construct; begin m_x :=x; m_y :=y; m_r1:=r1; m_r2:=r2; m_step :=step; m_start_angle:=start_angle; m_angle :=start_angle; m_da:=deg2rad(4.0 ); m_dr:=m_step / 90.0; end; { REWIND } procedure spiral.rewind; begin m_angle :=m_start_angle; m_curr_r:=m_r1; m_start :=true; end; { VERTEX } function spiral.vertex; begin if m_curr_r > m_r2 then begin result:=path_cmd_stop; exit; end; x^:=m_x + Cos(m_angle ) * m_curr_r; y^:=m_y + Sin(m_angle ) * m_curr_r; m_curr_r:=m_curr_r + m_dr; m_angle :=m_angle + m_da; if m_start then begin m_start:=false; result:=path_cmd_move_to; end else result:=path_cmd_line_to; end; { COUNT_SPANS } function count_spans(ras : rasterizer_scanline_ptr; sl : scanline_ptr ) : unsigned; var n : unsigned; begin n:=0; if ras.rewind_scanlines then begin sl.reset(ras._min_x ,ras._max_x ); if sl.is_embedded then while ras.sweep_scanline_em(sl ) do inc(n ,sl.num_spans ) else while ras.sweep_scanline(sl ) do inc(n ,sl.num_spans ); end; result:=n; end; { CONSTRUCT } constructor the_application.Construct; begin inherited Construct(format_ ,flip_y_ ); m_polygons.Construct (5.0 ,5.0 ,5.0 + 205.0 ,110.0 ,not flip_y_ ); m_fill_rule.Construct (200 ,5.0 ,200 + 105.0 ,50.0 ,not flip_y_ ); m_scanline_type.Construct(300 ,5.0 ,300 + 115.0 ,70.0 ,not flip_y_ ); m_operation.Construct (535.0 ,5.0 ,535.0 + 115.0 ,145.0 ,not flip_y_ ); m_operation.add_item ('None' ); m_operation.add_item ('OR' ); m_operation.add_item ('AND' ); m_operation.add_item ('XOR Linear' ); m_operation.add_item ('XOR Saddle' ); m_operation.add_item ('A-B' ); m_operation.add_item ('B-A' ); m_operation.cur_item_(2 ); add_ctrl(@m_operation ); m_operation.no_transform; m_fill_rule.add_item ('Even-Odd' ); m_fill_rule.add_item ('Non Zero' ); m_fill_rule.cur_item_(1 ); add_ctrl(@m_fill_rule ); m_fill_rule.no_transform; m_scanline_type.add_item ('scanline_p' ); m_scanline_type.add_item ('scanline_u' ); m_scanline_type.add_item ('scanline_bin' ); m_scanline_type.cur_item_(1 ); add_ctrl(@m_scanline_type ); m_scanline_type.no_transform; m_polygons.add_item ('Two Simple Paths' ); m_polygons.add_item ('Closed Stroke' ); m_polygons.add_item ('Great Britain and Arrows' ); m_polygons.add_item ('Great Britain and Spiral' ); m_polygons.add_item ('Spiral and Glyph' ); m_polygons.cur_item_(3 ); add_ctrl(@m_polygons ); m_polygons.no_transform; end; { DESTRUCT } destructor the_application.Destruct; begin inherited Destruct; m_polygons.Destruct; m_fill_rule.Destruct; m_scanline_type.Destruct; m_operation.Destruct; end; { RENDER_SCANLINE_BOOLEAN } procedure the_application.render_scanline_boolean; var op : sbool_op_e; rb : renderer_base; buf : array[0..99 ] of char; pixf : pixel_formats; rgba : aggclr; t1 ,t2 : double; i : int; num_spans : unsigned; renp , renu , rent : renderer_scanline_aa_solid; renb : renderer_scanline_bin_solid; slt , slp , slp1 , slp2 : scanline_p8; slu , slu1 , slu2 : scanline_u8; slb , slb1 , slb2 : scanline_bin; txt : gsv_text; txt_stroke : conv_stroke; storage , storage1 , storage2 : scanline_storage_aa8; storageb , storageb1 , storageb2 : scanline_storage_bin; begin if m_operation._cur_item > 0 then begin case m_operation._cur_item of 1 : op:=sbool_or; 2 : op:=sbool_and; 3 : op:=sbool_xor; 4 : op:=sbool_xor_saddle; 5 : op:=sbool_a_minus_b; 6 : op:=sbool_b_minus_a; end; pixfmt_bgr24(pixf ,rbuf_window ); rb.Construct(@pixf ); t1:=0.0; t2:=0.0; num_spans:=0; // Render Clipping case m_scanline_type._cur_item of 0 : begin renp.Construct(@rb ); slp.Construct; slp1.Construct; slp2.Construct; // The intermediate storage is used only to test the perfoprmance, // the short variant can be as follows: // ------------------------ // rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 ); // renp.color (@rgba ); // sbool_combine_shapes_aa(op ,ras1 ,ras2 ,@slp1 ,@slp2 ,@slp ,@renp ); storage.Construct; storage1.Construct; storage2.Construct; render_scanlines(ras1 ,@slp ,@storage1 ); render_scanlines(ras2 ,@slp ,@storage2 ); start_timer; for i:=0 to 9 do sbool_combine_shapes_aa(op ,@storage1 ,@storage2 ,@slp1 ,@slp2 ,@slp ,@storage ); t1:=elapsed_time / 10.0; start_timer; rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 ); renp.color_ (@rgba ); render_scanlines(@storage ,@slp ,@renp ); t2:=elapsed_time; num_spans:=count_spans(@storage ,@slp ); slp.Destruct; slp1.Destruct; slp2.Destruct; storage.Destruct; storage1.Destruct; storage2.Destruct; end; 1 : begin renu.Construct(@rb ); slu.Construct; slu1.Construct; slu2.Construct; {rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 ); renu.color (@rgba ); sbool_combine_shapes_aa(op ,ras1 ,ras2 ,@slu1 ,@slu2 ,@slu ,@renu );} storage.Construct; storage1.Construct; storage2.Construct; render_scanlines(ras1 ,@slu ,@storage1 ); render_scanlines(ras2 ,@slu ,@storage2 ); start_timer; for i:=0 to 9 do sbool_combine_shapes_aa(op ,@storage1 ,@storage2 ,@slu1 ,@slu2 ,@slu ,@storage ); t1:=elapsed_time / 10.0; start_timer; rgba.ConstrDbl (0.5 ,0.0 ,0 ,0.5 ); renu.color_ (@rgba ); render_scanlines(@storage ,@slu ,@renu ); t2:=elapsed_time; num_spans:=count_spans(@storage ,@slu );{} slu.Destruct; slu1.Destruct; slu2.Destruct; storage.Destruct; storage1.Destruct; storage2.Destruct;{} end; 2 : begin renb.Construct(@rb ); slb.Construct; slb1.Construct; slb2.Construct; storageb.Construct; storageb1.Construct; storageb2.Construct; render_scanlines(ras1 ,@slb ,@storageb1 ); render_scanlines(ras2 ,@slb ,@storageb2 ); start_timer; for i:=0 to 9 do sbool_combine_shapes_bin(op ,@storageb1 ,@storageb2 ,@slb1 ,@slb2 ,@slb ,@storageb ); t1:=elapsed_time / 10.0; start_timer; rgba.ConstrDbl ({0.5}1 ,0.0 ,0 {,0.5} ); renb.color_ (@rgba ); render_scanlines(@storageb ,@slb ,@renb ); t2:=elapsed_time; num_spans:=count_spans(@storageb ,@slb ); slb.Destruct; slb1.Destruct; slb2.Destruct; storageb.Destruct; storageb1.Destruct; storageb2.Destruct; end; end; // Render text sprintf(@buf[0 ] ,'Combine=%.3fms'#13#13 ,t1 ); sprintf(@buf[StrLen(@buf ) ] ,'Render=%.3fms'#13#13 ,t2 ); sprintf(@buf[StrLen(@buf ) ] ,'num_spans=%d' ,num_spans ); rent.Construct(@rb ); slt.Construct; txt.Construct; txt_stroke.Construct(@txt ); txt_stroke.width_ (1.0 ); txt_stroke.line_cap_(round_cap ); txt.size_ (8.0 ); txt.start_point_ (420 ,40 ); txt.text_ (@buf[0 ] ); ras1.reset; ras1.add_path (@txt_stroke ); rgba.ConstrDbl (0.0 ,0.0 ,0.0 ); rent.color_ (@rgba ); render_scanlines(ras1 ,@slt ,@rent ); slt.Destruct; txt.Destruct; txt_stroke.Destruct; end; end; { RENDER_SBOOL } function the_application.render_sbool; var pf : pixel_formats; rb : renderer_base; ren : renderer_scanline_aa_solid; sl : scanline_p8; ps1 , ps2 , gb_poly , arrows , glyph : path_storage; rgba : aggclr; x ,y : double; mtx1 , mtx2 , mtx : trans_affine; tat : trans_affine_translation; tas : trans_affine_scaling; stroke , stroke_gb_poly : conv_stroke; trans , trans_gb_poly , trans_arrows : conv_transform; curve : conv_curve; sp : spiral; begin pixfmt_bgr24(pf ,rbuf_window ); rb.Construct (@pf ); ren.Construct(@rb ); sl.Construct; if m_fill_rule._cur_item <> 0 then ras1.filling_rule(fill_non_zero ) else ras1.filling_rule(fill_even_odd ); if m_fill_rule._cur_item <> 0 then ras2.filling_rule(fill_non_zero ) else ras2.filling_rule(fill_even_odd ); case m_polygons._cur_item of 0 : // Two simple paths begin ps1.Construct; ps2.Construct; 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 ,y + 222 ); ps1.line_to(x + 363 ,y + 249 ); ps1.line_to(x + 265 ,y + 331 ); ps1.move_to(x + 242 ,y + 243 ); ps1.line_to(x + 268 ,y + 309 ); ps1.line_to(x + 325 ,y + 261 ); ps1.move_to(x + 259 ,y + 259 ); ps1.line_to(x + 273 ,y + 288 ); ps1.line_to(x + 298 ,y + 266 ); 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 ); ras1.reset; ras1.add_path (@ps1 ); rgba.ConstrDbl (0 ,0 ,0 ,{0.1}0.0 ); ren.color_ (@rgba ); { render_scanlines(ras1 ,@sl ,@ren ); } 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.