{mac_copy:spheres.bmp} // // 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 image_resample ; uses Math ,SysUtils , agg_basics , agg_platform_support , agg_color , agg_pixfmt , agg_pixfmt_rgba , agg_ctrl , agg_rbox_ctrl , agg_slider_ctrl , agg_rendering_buffer , agg_renderer_base , agg_renderer_scanline , agg_rasterizer_scanline_aa , agg_scanline , agg_scanline_u , agg_render_scanlines , agg_path_storage , agg_conv_transform , agg_conv_stroke , agg_trans_affine , agg_trans_perspective , agg_span_interpolator_linear , agg_span_interpolator_trans , agg_span_interpolator_persp , agg_span_subdiv_adaptor , agg_span_image_filter , agg_span_image_filter_rgba , agg_span_image_resample , agg_span_image_resample_rgba , agg_span_allocator , agg_image_filters , agg_gsv_text , agg_gamma_lut , interactive_polygon_ , file_utils_ ; {$I agg_mode.inc } const flip_y = true; base_shift = agg_color.base_shift; var g_x1 , g_y1 , g_x2 , g_y2 : double; global_offset : int; g_rasterizer : rasterizer_scanline_aa; g_scanline : scanline_u8; img_name ,p ,n ,x : shortstring; type the_application = object(platform_support ) m_gamma_lut : gamma_lut; m_quad : interactive_polygon; m_trans_type : rbox_ctrl; m_gamma , m_blur : slider_ctrl; m_old_gamma : double; constructor Construct(format_ : pix_format_e; flip_y_ : boolean ); destructor Destruct; 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_mouse_button_up (x ,y : int; flags : unsigned ); virtual; procedure on_key(x ,y : int; key ,flags : unsigned ); virtual; end; { CONSTRUCT } constructor the_application.Construct; begin inherited Construct(format_ ,flip_y_ ); m_gamma_lut.Construct(2.0 ,base_shift ,base_shift ); m_quad.Construct (4 ,5.0 ); m_trans_type.Construct(400 ,5.0 ,430 + 170.0 ,100.0 ,not flip_y_ ); m_gamma.Construct (5.0 ,5.0 + 15 * 0 ,400-5 ,10.0 + 15 * 0 ,not flip_y_ ); m_blur.Construct (5.0 ,5.0 + 15 * 1 ,400-5 ,10.0 + 15 * 1 ,not flip_y_ ); m_old_gamma:=2.0; m_trans_type.text_size_(7 ); m_trans_type.add_item ('Affine No Resample' ); m_trans_type.add_item ('Affine Resample' ); m_trans_type.add_item ('Perspective No Resample LERP' ); m_trans_type.add_item ('Perspective No Resample Exact' ); m_trans_type.add_item ('Perspective Resample LERP' ); m_trans_type.add_item ('Perspective Resample Exact' ); m_trans_type.cur_item_ (4 ); add_ctrl(@m_trans_type ); m_gamma.range_(0.5 ,3.0 ); m_gamma.value_(2.0 ); m_gamma.label_('Gamma=%.3f' ); add_ctrl(@m_gamma ); m_blur.range_(0.5, 2.0); m_blur.value_(1.0 ); m_blur.label_('Blur=%.3f' ); add_ctrl(@m_blur ); end; { DESTRUCT } destructor the_application.Destruct; begin inherited Destruct; m_gamma_lut.Destruct; m_quad.Destruct; m_trans_type.Destruct; m_gamma.Destruct; m_blur.Destruct; end; { ON_INIT } procedure the_application.on_init; var x1 ,y1 ,x2 ,y2 ,dx ,dy : double; pixf : pixel_formats; begin g_x1:=0.0; g_y1:=0.0; g_x2:=rbuf_img(0 )._width; g_y2:=rbuf_img(0 )._height; x1:=g_x1;// * 100.0; y1:=g_y1;// * 100.0; x2:=g_x2;// * 100.0; y2:=g_y2;// * 100.0; dx:=_width / 2.0 - (x2 - x1 ) / 2.0; dy:=_height / 2.0 - (y2 - y1 ) / 2.0; m_quad.xn_ptr(0 )^:=Floor(x1 + dx ); m_quad.yn_ptr(0 )^:=Floor(y1 + dy );// - 150; m_quad.xn_ptr(1 )^:=Floor(x2 + dx ); m_quad.yn_ptr(1 )^:=Floor(y1 + dy );// - 110; m_quad.xn_ptr(2 )^:=Floor(x2 + dx ); m_quad.yn_ptr(2 )^:=Floor(y2 + dy );// - 300; m_quad.xn_ptr(3 )^:=Floor(x1 + dx ); m_quad.yn_ptr(3 )^:=Floor(y2 + dy );// - 200; pixfmt_bgra32(pixf ,rbuf_img(0 ) ); pixf.apply_gamma_dir(@m_gamma_lut ,bgra_order ); end; { ON_DRAW } procedure the_application.on_draw; var pixf ,pixf_pre : pixel_formats; rb ,rb_pre : renderer_base; rgba : aggclr; r : renderer_scanline_aa_solid; b : int; sa : span_allocator; tr : trans_affine; sg : span_image_filter_ptr; ri : renderer_scanline_aa; trp : trans_perspective23; interpolator : span_interpolator_linear; interpsubdiv : span_interpolator_linear_subdiv; interp_trans : span_interpolator_trans; interp_plerp : span_interpolator_persp_lerp; interp_exact : span_interpolator_persp_exact; subdiv_adaptor : span_subdiv_adaptor; filter_kernel : image_filter_hanning; filter : image_filter_lut; tm : double; buf : array[0..63 ] of char; t : gsv_text; pt : conv_stroke; begin sg:=NIL; if m_gamma._value <> m_old_gamma then begin m_gamma_lut.gamma_(m_gamma._value ); load_img(0 ,img_name ); pixfmt_bgra32(pixf ,rbuf_img(0 ) ); pixf.apply_gamma_dir(@m_gamma_lut ,bgra_order ); m_old_gamma:=m_gamma._value; end; // Initialize structures pixfmt_bgra32 (pixf ,rbuf_window ); pixfmt_bgra32_pre(pixf_pre ,rbuf_window ); rb.Construct (@pixf ); rb_pre.Construct(@pixf_pre ); r.Construct(@rb ); rgba.ConstrDbl(1 ,1 ,1 ); rb.clear (@rgba ); if m_trans_type._cur_item < 2 then begin // For the affine parallelogram transformations we // calculate the 4-th (implicit) point of the parallelogram m_quad.xn_ptr(3 )^:=m_quad.xn(0 ) + (m_quad.xn(2 ) - m_quad.xn(1 ) ); m_quad.yn_ptr(3 )^:=m_quad.yn(0 ) + (m_quad.yn(2 ) - m_quad.yn(1 ) ); end; // Render the "quad" tool and controls g_rasterizer.add_path(@m_quad ); rgba.ConstrDbl (0 ,0.3 ,0.5 ,0.1 ); r.color_ (@rgba ); render_scanlines(@g_rasterizer ,@g_scanline ,@r ); // Prepare the polygon to rasterize. Here we need to fill // the destination (transformed) polygon. g_rasterizer.clip_box(0 ,0 ,_width ,_height ); g_rasterizer.reset; b:=0; g_rasterizer.move_to_d(m_quad.xn(0 ) - b ,m_quad.yn(0 ) - b ); g_rasterizer.line_to_d(m_quad.xn(1 ) + b ,m_quad.yn(1 ) - b ); g_rasterizer.line_to_d(m_quad.xn(2 ) + b ,m_quad.yn(2 ) + b ); g_rasterizer.line_to_d(m_quad.xn(3 ) - b ,m_quad.yn(3 ) + b ); sa.Construct; filter_kernel.Construct; filter.Construct(@filter_kernel ,true ); rgba.ConstrPre(0 ,0 ,0 ,0 ); start_timer; case m_trans_type._cur_item of 0 : begin tr.Construct(parallelo_ptr(m_quad.polygon ) ,g_x1 ,g_y1 ,g_x2 ,g_y2 ); interpolator.Construct(@tr ); sg:=new( span_image_filter_rgba_2x2_ptr , Construct( @sa ,rbuf_img(0 ) ,@rgba ,@interpolator ,@filter ,bgra_order ) ); ri.Construct (@rb_pre ,sg ); render_scanlines(@g_rasterizer ,@g_scanline ,@ri ); end; 1 : begin tr.Construct(parallelo_ptr(m_quad.polygon ) ,g_x1 ,g_y1 ,g_x2 ,g_y2 ); interpolator.Construct(@tr ); sg:=new( span_image_resample_rgba_affine_ptr , Construct( @sa ,rbuf_img(0 ) ,@rgba ,@interpolator ,@filter ,bgra_order ) ); span_image_resample_ptr(sg ).blur_(m_blur._value ); ri.Construct (@rb_pre ,sg ); render_scanlines(@g_rasterizer ,@g_scanline ,@ri ); end; 2 : begin trp.Construct(m_quad.polygon ,g_x1 ,g_y1 ,g_x2 ,g_y2 ); if trp.is_valid then begin interpsubdiv.Construct(@trp ); sg:=new( span_image_filter_rgba_2x2_ptr , Construct( @sa ,rbuf_img(0 ) ,@rgba ,@interpsubdiv ,@filter ,bgra_order ) ); ri.Construct (@rb_pre ,sg ); render_scanlines(@g_rasterizer ,@g_scanline ,@ri ); end; end; 3 : begin trp.Construct(m_quad.polygon ,g_x1 ,g_y1 ,g_x2 ,g_y2 ); if trp.is_valid then begin interp_trans.Construct(@trp ); sg:=new( span_image_filter_rgba_2x2_ptr , Construct( @sa ,rbuf_img(0 ) ,@rgba ,@interp_trans ,@filter ,bgra_order ) ); ri.Construct (@rb_pre ,sg ); render_scanlines(@g_rasterizer ,@g_scanline ,@ri ); end; end; 4 : begin interp_plerp.Construct (m_quad.polygon ,g_x1 ,g_y1 ,g_x2 ,g_y2 ); subdiv_adaptor.Construct(@interp_plerp ); if interp_plerp.is_valid then begin sg:=new( span_image_resample_rgba_ptr , Construct( @sa ,rbuf_img(0 ) ,@rgba ,@subdiv_adaptor ,@filter ,bgra_order ) ); span_image_resample_ptr(sg ).blur_(m_blur._value ); ri.Construct (@rb_pre ,sg ); render_scanlines(@g_rasterizer ,@g_scanline ,@ri ); end; end; 5 : begin interp_exact.Construct (m_quad.polygon ,g_x1 ,g_y1 ,g_x2 ,g_y2 ); subdiv_adaptor.Construct(@interp_exact ); if interp_exact.is_valid then begin sg:=new( span_image_resample_rgba_ptr , Construct( @sa ,rbuf_img(0 ) ,@rgba ,@subdiv_adaptor ,@filter ,bgra_order ) ); span_image_resample_ptr(sg ).blur_(m_blur._value ); ri.Construct (@rb_pre ,sg ); render_scanlines(@g_rasterizer ,@g_scanline ,@ri ); end; end; end; // Render Text tm:=elapsed_time; pixf.apply_gamma_inv(@m_gamma_lut ,bgra_order ); t.Construct; t.size_(10.0 ); pt.Construct(@t ); pt.width_ (1.5 ); sprintf (@buf[0 ] ,'%3.2f ms' ,tm ); t.start_point_(10.0 ,70.0 ); t.text_ (@buf[0 ] ); g_rasterizer.add_path(@pt ); rgba.ConstrDbl (0 ,0 ,0 ); r.color_ (@rgba ); render_scanlines(@g_rasterizer ,@g_scanline ,@r ); // Render the controls render_ctrl(@g_rasterizer ,@g_scanline ,@r ,@m_trans_type ); render_ctrl(@g_rasterizer ,@g_scanline ,@r ,@m_gamma ); render_ctrl(@g_rasterizer ,@g_scanline ,@r ,@m_blur ); // Free AGG resources sa.Destruct; filter.Destruct; if sg <> NIL then dispose(sg ,Destruct ); t.Destruct; pt.Destruct; end; { ON_MOUSE_MOVE } procedure the_application.on_mouse_move; begin if flags and mouse_left <> 0 then if m_quad.on_mouse_move(x ,y ) then force_redraw; if flags and mouse_left = 0 then on_mouse_button_up(x ,y ,flags ); end; { ON_MOUSE_BUTTON_DOWN } procedure the_application.on_mouse_button_down; begin if flags and mouse_left <> 0 then if m_quad.on_mouse_button_down(x ,y ) then force_redraw; end; { ON_MOUSE_BUTTON_UP } procedure the_application.on_mouse_button_up; begin if m_quad.on_mouse_button_up(x ,y ) then force_redraw; end; { ON_KEY } procedure the_application.on_key; var cx ,cy : double; tr : trans_affine; tar : trans_affine_rotation; tat : trans_affine_translation; begin if key = byte(' ' ) then begin cx:=(m_quad.xn(0 ) + m_quad.xn(1 ) + m_quad.xn(2 ) + m_quad.xn(3 ) ) / 4; cy:=(m_quad.yn(0 ) + m_quad.yn(1 ) + m_quad.yn(2 ) + m_quad.yn(3 ) ) / 4; tr.Construct; tat.construct(-cx ,-cy ); tr:=tat; tar.Construct(pi / 20{2.0} ); tr.multiply(@tar ); tat.Construct(cx ,cy ); tr.multiply(@tat ); tr.transform(@tr ,m_quad.xn_ptr(0 ) ,m_quad.yn_ptr(0 ) ); tr.transform(@tr ,m_quad.xn_ptr(1 ) ,m_quad.yn_ptr(1 ) ); tr.transform(@tr ,m_quad.xn_ptr(2 ) ,m_quad.yn_ptr(2 ) ); tr.transform(@tr ,m_quad.xn_ptr(3 ) ,m_quad.yn_ptr(3 ) ); force_redraw; end; if key = key_f1 then message_( 'The demonstration of image transformations with resampling. '#13 + 'You can see the difference in quality between regular image transformers and '#13 + 'the ones with resampling. Of course, image tranformations with resampling work '#13 + 'slower because they provide the best possible quality.'#13#13 + 'How to play with:'#13#13 + 'Use the left mouse button to manipulate with image.'#13 + 'Press the spacebar to rotate the image by 1/20 of pi.' + #13#13'Note: F2 key saves current "screenshot" file in this demo''s directory. ' ); end; VAR app : the_application; buf : array [0..255 ] of char; ext : string[10 ]; BEGIN g_x1:=0; g_y1:=0; g_x2:=0; g_y2:=0; global_offset:=0; g_rasterizer.Construct; g_scanline.Construct; app.Construct(pix_format_bgra32 ,flip_y ); app.caption_ ('AGG Example. Image Transformations with Resampling (F1-Help)' ); img_name:='spheres'; {$IFDEF WIN32 } if ParamCount > 0 then begin spread_name(ParamStr(1 ) ,p ,n ,x ); img_name:=fold_name(p ,n ,'' ); end; {$ENDIF } if not app.load_img(0 ,img_name ) then begin img_name:=img_name + #0; ext :=app._img_ext + #0; if img_name = 'spheres'#0 then begin sprintf(@buf[0 ] ,'File not found: %s' ,ptrcomp(@img_name[1 ] ) ); sprintf(@buf[StrLen(@buf ) ] ,'%s. '#13'Download http://www.antigrain.com/' ,ptrcomp(@ext[1 ] ) ); sprintf(@buf[StrLen(@buf ) ] ,'%s' ,ptrcomp(@img_name[1 ] ) ); sprintf(@buf[StrLen(@buf ) ] ,'%s'#13'or copy it from another directory if available.' ,ptrcomp(@ext[1 ] ) ); end else begin sprintf(@buf[0 ] ,'File not found: %s' ,ptrcomp(@img_name[1 ] ) ); sprintf(@buf[StrLen(@buf ) ] ,'%s' ,ptrcomp(@ext[1 ] ) ); end; app.message_(@buf[0 ] ); end else if app.init(600 ,600 ,window_resize ) then app.run; app.Destruct; g_rasterizer.Destruct; g_scanline.Destruct; END.