mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-11-04 05:23:12 +01:00
728 lines
17 KiB
ObjectPascal
728 lines
17 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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gradients ;
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{DEFINE AGG_GRAY8 }
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{$DEFINE AGG_BGR24 }
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{DEFINE AGG_RGB24 }
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{DEFINE AGG_BGRA32 }
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{DEFINE AGG_RGBA32 }
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{DEFINE AGG_ARGB32 }
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{DEFINE AGG_ABGR32 }
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{DEFINE AGG_RGB565 }
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{DEFINE AGG_RGB555 }
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uses
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Math ,SysUtils ,
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agg_basics ,
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agg_platform_support ,
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agg_ctrl ,
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agg_spline_ctrl ,
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agg_rbox_ctrl ,
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agg_gamma_ctrl ,
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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_renderer_base ,
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agg_renderer_scanline ,
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agg_render_scanlines ,
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agg_array ,
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agg_conv_transform ,
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agg_span_gradient ,
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agg_span_interpolator_linear ,
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agg_span_allocator ,
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agg_trans_affine ,
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agg_ellipse
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{$I pixel_formats.inc }
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{$I agg_mode.inc }
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{$I- }
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const
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flip_y = true;
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center_x : double = 350;
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center_y : double = 280;
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type
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color_function_profile = object(array_base )
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m_colors : aggclr_ptr;
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m_profile : int8u_ptr;
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constructor Construct(colors : aggclr_ptr; profile : int8u_ptr );
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function size : unsigned; virtual;
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function array_operator(i : unsigned ) : pointer; virtual;
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end;
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the_application = object(platform_support )
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m_profile : gamma_ctrl;
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m_spline_r ,
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m_spline_g ,
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m_spline_b ,
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m_spline_a : spline_ctrl;
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m_rbox : rbox_ctrl;
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m_pdx ,
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m_pdy ,
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m_center_x ,
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m_center_y ,
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m_scale ,
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m_prev_scale ,
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m_angle ,
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m_prev_angle ,
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m_scale_x ,
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m_prev_scale_x ,
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m_scale_y ,
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m_prev_scale_y : double;
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m_mouse_move : boolean;
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constructor Construct(format_ : pix_format_e; flip_y_ : boolean );
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destructor Destruct;
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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_mouse_button_up (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 color_function_profile.Construct;
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begin
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m_colors :=colors;
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m_profile:=profile;
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end;
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{ SIZE }
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function color_function_profile.size;
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begin
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result:=256;
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end;
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{ ARRAY_OPERATOR }
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function color_function_profile.array_operator;
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begin
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result:=
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aggclr_ptr(
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ptrcomp(m_colors ) +
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int8u_ptr(ptrcomp(m_profile ) + i * sizeof(int8u ) )^ * sizeof(aggclr ) );
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end;
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{ CONSTRUCT }
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constructor the_application.Construct;
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var
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rgba : aggclr;
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fd : text;
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err : integer;
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x ,y ,x2 ,y2 ,t : double;
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begin
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inherited Construct(format_ ,flip_y_ );
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m_profile.Construct (10.0 ,10.0 ,200.0 ,170.0 - 5.0 ,not flip_y_ );
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m_spline_r.Construct(210 ,10 ,210 + 250 ,5 + 40 ,6 ,not flip_y_ );
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m_spline_g.Construct(210 ,10 + 40 ,210 + 250 ,5 + 80 ,6 ,not flip_y_ );
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m_spline_b.Construct(210 ,10 + 80 ,210 + 250 ,5 + 120 ,6 ,not flip_y_ );
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m_spline_a.Construct(210 ,10 + 120 ,210 + 250 ,5 + 160 ,6 ,not flip_y_ );
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m_rbox.Construct (10.0 ,180.0 ,200.0 ,300.0 ,not flip_y_ );
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m_pdx:=0.0;
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m_pdy:=0.0;
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m_center_x:=center_x;
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m_center_y:=center_y;
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m_scale :=1.0;
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m_prev_scale :=1.0;
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m_angle :=0.0;
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m_prev_angle :=0.0;
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m_scale_x :=1.0;
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m_prev_scale_x:=1.0;
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m_scale_y :=1.0;
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m_prev_scale_y:=1.0;
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m_mouse_move:=false;
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add_ctrl(@m_profile );
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add_ctrl(@m_spline_r );
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add_ctrl(@m_spline_g );
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add_ctrl(@m_spline_b );
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add_ctrl(@m_spline_a );
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add_ctrl(@m_rbox );
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m_profile.border_width_(2.0 ,2.0 );
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rgba.ConstrDbl (1.0 ,0.8 ,0.8 );
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m_spline_r.background_color_(@rgba );
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rgba.ConstrDbl (0.8 ,1.0 ,0.8 );
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m_spline_g.background_color_(@rgba );
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rgba.ConstrDbl (0.8 ,0.8 ,1.0 );
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m_spline_b.background_color_(@rgba );
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rgba.ConstrDbl (1.0 ,1.0 ,1.0 );
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m_spline_a.background_color_(@rgba );
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m_spline_r.border_width_(1.0 ,2.0 );
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m_spline_g.border_width_(1.0 ,2.0 );
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m_spline_b.border_width_(1.0 ,2.0 );
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m_spline_a.border_width_(1.0 ,2.0 );
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m_rbox.border_width_ (2.0 ,2.0 );
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m_spline_r.point_(0 ,0.0 ,1.0 );
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m_spline_r.point_(1 ,1.0 / 5.0 ,1.0 - 1.0 / 5.0 );
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m_spline_r.point_(2 ,2.0 / 5.0 ,1.0 - 2.0 / 5.0 );
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m_spline_r.point_(3 ,3.0 / 5.0 ,1.0 - 3.0 / 5.0 );
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m_spline_r.point_(4 ,4.0 / 5.0 ,1.0 - 4.0 / 5.0 );
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m_spline_r.point_(5 ,1.0 ,0.0 );
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m_spline_r.update_spline;
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m_spline_g.point_(0 ,0.0 ,1.0 );
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m_spline_g.point_(1 ,1.0 / 5.0 ,1.0 - 1.0 / 5.0 );
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m_spline_g.point_(2 ,2.0 / 5.0 ,1.0 - 2.0 / 5.0 );
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m_spline_g.point_(3 ,3.0 / 5.0 ,1.0 - 3.0 / 5.0 );
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m_spline_g.point_(4 ,4.0 / 5.0 ,1.0 - 4.0 / 5.0 );
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m_spline_g.point_(5 ,1.0 ,0.0 );
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m_spline_g.update_spline;
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m_spline_b.point_(0 ,0.0 ,1.0 );
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m_spline_b.point_(1 ,1.0 / 5.0 ,1.0 - 1.0 / 5.0 );
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m_spline_b.point_(2 ,2.0 / 5.0 ,1.0 - 2.0 / 5.0 );
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m_spline_b.point_(3 ,3.0 / 5.0 ,1.0 - 3.0 / 5.0 );
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m_spline_b.point_(4 ,4.0 / 5.0 ,1.0 - 4.0 / 5.0 );
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m_spline_b.point_(5 ,1.0 ,0.0 );
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m_spline_b.update_spline;
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m_spline_a.point_(0 ,0.0 ,1.0 );
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m_spline_a.point_(1 ,1.0 / 5.0 , 1.0 );
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m_spline_a.point_(2 ,2.0 / 5.0 , 1.0 );
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m_spline_a.point_(3 ,3.0 / 5.0 , 1.0 );
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m_spline_a.point_(4 ,4.0 / 5.0 , 1.0 );
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m_spline_a.point_(5 ,1.0 ,1.0 );
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m_spline_a.update_spline;
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m_rbox.add_item ('Circular' );
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m_rbox.add_item ('Diamond' );
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m_rbox.add_item ('Linear' );
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m_rbox.add_item ('XY' );
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m_rbox.add_item ('sqrt(XY)' );
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m_rbox.add_item ('Conic' );
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m_rbox.cur_item_(0 );
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err:=IOResult;
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AssignFile(fd ,'settings.dat' );
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reset (fd );
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err:=IOResult;
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if err = 0 then
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begin
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readln(fd ,t ); m_center_x:=t;
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readln(fd ,t ); m_center_y:=t;
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readln(fd ,t ); m_scale:=t;
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readln(fd ,t ); m_angle:=t;
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readln(fd ,x );
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readln(fd ,y ); m_spline_r.point_(0 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_r.point_(1 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_r.point_(2 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_r.point_(3 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_r.point_(4 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_r.point_(5 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_g.point_(0 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_g.point_(1 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_g.point_(2 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_g.point_(3 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_g.point_(4 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_g.point_(5 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_b.point_(0 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_b.point_(1 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_b.point_(2 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_b.point_(3 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_b.point_(4 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_b.point_(5 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_a.point_(0 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_a.point_(1 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_a.point_(2 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_a.point_(3 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_a.point_(4 ,x ,y );
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readln(fd ,x );
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readln(fd ,y ); m_spline_a.point_(5 ,x ,y );
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m_spline_r.update_spline;
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m_spline_g.update_spline;
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m_spline_b.update_spline;
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m_spline_a.update_spline;
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readln(fd ,x );
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readln(fd ,y );
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readln(fd ,x2 );
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readln(fd ,y2 );
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m_profile.values(x ,y ,x2 ,y2 );
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close(fd );
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end;
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end;
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{ DESTRUCT }
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destructor the_application.Destruct;
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var
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fd : text;
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x1 ,y1 ,x2 ,y2 : double;
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begin
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AssignFile(fd ,'settings.dat' );
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rewrite (fd );
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writeln(fd ,m_center_x:0:6 );
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writeln(fd ,m_center_y:0:6 );
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writeln(fd ,m_scale:0:6 );
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writeln(fd ,m_angle:0:6 );
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writeln(fd ,m_spline_r._x(0 ):0:6 );
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writeln(fd ,m_spline_r._y(0 ):0:6 );
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writeln(fd ,m_spline_r._x(1 ):0:6 );
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writeln(fd ,m_spline_r._y(1 ):0:6 );
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writeln(fd ,m_spline_r._x(2 ):0:6 );
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writeln(fd ,m_spline_r._y(2 ):0:6 );
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writeln(fd ,m_spline_r._x(3 ):0:6 );
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writeln(fd ,m_spline_r._y(3 ):0:6 );
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writeln(fd ,m_spline_r._x(4 ):0:6 );
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writeln(fd ,m_spline_r._y(4 ):0:6 );
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writeln(fd ,m_spline_r._x(5 ):0:6 );
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writeln(fd ,m_spline_r._y(5 ):0:6 );
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writeln(fd ,m_spline_g._x(0 ):0:6 );
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writeln(fd ,m_spline_g._y(0 ):0:6 );
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writeln(fd ,m_spline_g._x(1 ):0:6 );
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writeln(fd ,m_spline_g._y(1 ):0:6 );
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writeln(fd ,m_spline_g._x(2 ):0:6 );
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writeln(fd ,m_spline_g._y(2 ):0:6 );
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writeln(fd ,m_spline_g._x(3 ):0:6 );
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writeln(fd ,m_spline_g._y(3 ):0:6 );
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writeln(fd ,m_spline_g._x(4 ):0:6 );
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writeln(fd ,m_spline_g._y(4 ):0:6 );
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writeln(fd ,m_spline_g._x(5 ):0:6 );
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writeln(fd ,m_spline_g._y(5 ):0:6 );
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writeln(fd ,m_spline_b._x(0 ):0:6 );
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writeln(fd ,m_spline_b._y(0 ):0:6 );
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writeln(fd ,m_spline_b._x(1 ):0:6 );
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writeln(fd ,m_spline_b._y(1 ):0:6 );
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writeln(fd ,m_spline_b._x(2 ):0:6 );
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writeln(fd ,m_spline_b._y(2 ):0:6 );
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writeln(fd ,m_spline_b._x(3 ):0:6 );
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writeln(fd ,m_spline_b._y(3 ):0:6 );
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writeln(fd ,m_spline_b._x(4 ):0:6 );
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writeln(fd ,m_spline_b._y(4 ):0:6 );
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writeln(fd ,m_spline_b._x(5 ):0:6 );
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writeln(fd ,m_spline_b._y(5 ):0:6 );
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writeln(fd ,m_spline_a._x(0 ):0:6 );
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writeln(fd ,m_spline_a._y(0 ):0:6 );
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writeln(fd ,m_spline_a._x(1 ):0:6 );
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writeln(fd ,m_spline_a._y(1 ):0:6 );
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writeln(fd ,m_spline_a._x(2 ):0:6 );
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writeln(fd ,m_spline_a._y(2 ):0:6 );
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writeln(fd ,m_spline_a._x(3 ):0:6 );
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writeln(fd ,m_spline_a._y(3 ):0:6 );
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writeln(fd ,m_spline_a._x(4 ):0:6 );
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writeln(fd ,m_spline_a._y(4 ):0:6 );
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writeln(fd ,m_spline_a._x(5 ):0:6 );
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writeln(fd ,m_spline_a._y(5 ):0:6 );
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m_profile.values(@x1 ,@y1 ,@x2 ,@y2 );
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writeln(fd ,x1:0:6 );
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writeln(fd ,y1:0:6 );
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writeln(fd ,x2:0:6 );
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writeln(fd ,y2:0:6 );
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close(fd );
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inherited Destruct;
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m_profile.Destruct;
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m_spline_r.Destruct;
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m_spline_g.Destruct;
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m_spline_b.Destruct;
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m_spline_a.Destruct;
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m_rbox.Destruct;
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end;
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{ ON_DRAW }
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procedure the_application.on_draw;
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var
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pf : rasterizer_scanline_aa;
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sl : scanline_u8;
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rb : renderer_base;
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r : renderer_scanline_aa_solid;
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pixf : pixel_formats;
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rgba : aggclr;
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ini_scale : double;
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color_profile : array[0..255 ] of aggclr;
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mtx1 ,mtx_g1 : trans_affine;
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tas : trans_affine_scaling;
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tar : trans_affine_rotation;
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tat : trans_affine_translation;
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e1 : ellipse;
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i : int;
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t1 : conv_transform;
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gr_circle : gradient_radial;
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gr_diamond : gradient_diamond;
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gr_x : gradient_x;
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gr_xy : gradient_xy;
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gr_sqrt_xy : gradient_sqrt_xy;
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gr_conic : gradient_conic;
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gr_ptr : gradient_reflect_adaptor;
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span_alloc : span_allocator;
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colors : color_function_profile;
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inter : span_interpolator_linear;
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span_gen : span_gradient;
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r1 : renderer_scanline_aa;
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begin
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// Initialize structures
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pf.Construct;
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sl.Construct;
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pixfmt(pixf ,rbuf_window );
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rb.Construct(@pixf );
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r.Construct (@rb );
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rgba.ConstrDbl(0 ,0 ,0 );
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rb.clear (@rgba );
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// Render the controls
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m_profile.text_size_(8.0 );
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render_ctrl(@pf ,@sl ,@r ,@m_profile );
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render_ctrl(@pf ,@sl ,@r ,@m_spline_r );
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render_ctrl(@pf ,@sl ,@r ,@m_spline_g );
|
|
render_ctrl(@pf ,@sl ,@r ,@m_spline_b );
|
|
render_ctrl(@pf ,@sl ,@r ,@m_spline_a );
|
|
render_ctrl(@pf ,@sl ,@r ,@m_rbox );
|
|
|
|
// Render
|
|
ini_scale:=1.0;
|
|
|
|
mtx1.Construct;
|
|
|
|
tas.Construct(ini_scale ,ini_scale ); mtx1.multiply(@tas );
|
|
tar.Construct(deg2rad(0.0 ) ); mtx1.multiply(@tar );
|
|
tat.Construct(center_x ,center_y ); mtx1.multiply(@tat );
|
|
|
|
mtx1.multiply(_trans_affine_resizing );
|
|
|
|
e1.Construct;
|
|
e1.init(0.0 ,0.0 ,110.0 ,110.0 ,64 );
|
|
|
|
mtx_g1.Construct;
|
|
|
|
tas.Construct(ini_scale ,ini_scale ); mtx_g1.multiply(@tas );
|
|
tas.Construct(m_scale ,m_scale ); mtx_g1.multiply(@tas );
|
|
tas.Construct(m_scale_x ,m_scale_y ); mtx_g1.multiply(@tas );
|
|
tar.Construct(m_angle ); mtx_g1.multiply(@tar );
|
|
tat.Construct(m_center_x ,m_center_y ); mtx_g1.multiply(@tat );
|
|
|
|
mtx_g1.multiply(_trans_affine_resizing );
|
|
mtx_g1.invert;
|
|
|
|
for i:=0 to 255 do
|
|
begin
|
|
rgba.ConstrDbl(
|
|
double_ptr(ptrcomp(m_spline_r._spline ) + i * sizeof(double ) )^ ,
|
|
double_ptr(ptrcomp(m_spline_g._spline ) + i * sizeof(double ) )^ ,
|
|
double_ptr(ptrcomp(m_spline_b._spline ) + i * sizeof(double ) )^ ,
|
|
double_ptr(ptrcomp(m_spline_a._spline ) + i * sizeof(double ) )^ );
|
|
|
|
color_profile[i ]:=rgba;
|
|
|
|
end;
|
|
|
|
t1.Construct(@e1 ,@mtx1 );
|
|
|
|
case m_rbox._cur_item of
|
|
0 :
|
|
begin
|
|
gr_circle.Construct;
|
|
gr_ptr.Construct(@gr_circle );
|
|
|
|
end;
|
|
|
|
1 :
|
|
begin
|
|
gr_diamond.Construct;
|
|
gr_ptr.Construct(@gr_diamond );
|
|
|
|
end;
|
|
|
|
2 :
|
|
begin
|
|
gr_x.Construct;
|
|
gr_ptr.Construct(@gr_x );
|
|
|
|
end;
|
|
|
|
3 :
|
|
begin
|
|
gr_xy.Construct;
|
|
gr_ptr.Construct(@gr_xy );
|
|
|
|
end;
|
|
|
|
4 :
|
|
begin
|
|
gr_sqrt_xy.Construct;
|
|
gr_ptr.Construct(@gr_sqrt_xy );
|
|
|
|
end;
|
|
|
|
5 :
|
|
begin
|
|
gr_conic.Construct;
|
|
gr_ptr.Construct(@gr_conic );
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
span_alloc.Construct;
|
|
colors.Construct (@color_profile ,int8u_ptr(m_profile.gamma ) );
|
|
inter.Construct (@mtx_g1);
|
|
span_gen.Construct(@span_alloc ,@inter ,@gr_ptr ,@colors ,0 ,150 );
|
|
r1.construct (@rb ,@span_gen );
|
|
|
|
pf.add_path (@t1 );
|
|
render_scanlines(@pf ,@sl ,@r1 );
|
|
|
|
// Free AGG resources
|
|
pf.Destruct;
|
|
sl.Destruct;
|
|
|
|
span_alloc.Destruct;
|
|
|
|
end;
|
|
|
|
{ ON_MOUSE_MOVE }
|
|
procedure the_application.on_mouse_move;
|
|
var
|
|
x2 ,y2 ,dx ,dy : double;
|
|
|
|
begin
|
|
if m_mouse_move then
|
|
begin
|
|
x2:=x;
|
|
y2:=y;
|
|
|
|
_trans_affine_resizing.inverse_transform(_trans_affine_resizing ,@x2 ,@y2 );
|
|
|
|
if flags and kbd_ctrl <> 0 then
|
|
begin
|
|
dx:=x2 - m_center_x;
|
|
dy:=y2 - m_center_y;
|
|
|
|
m_scale_x:=m_prev_scale_x * dx / m_pdx;
|
|
m_scale_y:=m_prev_scale_y * dy / m_pdy;
|
|
|
|
force_redraw;
|
|
|
|
end
|
|
else
|
|
begin
|
|
if flags and mouse_left <> 0 then
|
|
begin
|
|
m_center_x:=x2 + m_pdx;
|
|
m_center_y:=y2 + m_pdy;
|
|
|
|
force_redraw;
|
|
|
|
end;
|
|
|
|
if flags and mouse_right <> 0 then
|
|
begin
|
|
dx:=x2 - m_center_x;
|
|
dy:=y2 - m_center_y;
|
|
|
|
m_scale:=
|
|
m_prev_scale *
|
|
Sqrt(dx * dx + dy * dy ) /
|
|
Sqrt(m_pdx * m_pdx + m_pdy * m_pdy );
|
|
|
|
m_angle:=m_prev_angle + ArcTan2(dy ,dx ) - ArcTan2(m_pdy ,m_pdx );
|
|
|
|
force_redraw;
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
{ ON_MOUSE_BUTTON_DOWN }
|
|
procedure the_application.on_mouse_button_down;
|
|
var
|
|
x2 ,y2 : double;
|
|
|
|
begin
|
|
m_mouse_move:=true;
|
|
|
|
x2:=x;
|
|
y2:=y;
|
|
|
|
_trans_affine_resizing.inverse_transform(_trans_affine_resizing ,@x2 ,@y2 );
|
|
|
|
m_pdx:=m_center_x - x2;
|
|
m_pdy:=m_center_y - y2;
|
|
|
|
m_prev_scale :=m_scale;
|
|
m_prev_angle :=m_angle + pi;
|
|
m_prev_scale_x:=m_scale_x;
|
|
m_prev_scale_y:=m_scale_y;
|
|
|
|
force_redraw;
|
|
|
|
end;
|
|
|
|
{ ON_MOUSE_BUTTON_UP }
|
|
procedure the_application.on_mouse_button_up;
|
|
begin
|
|
m_mouse_move:=false;
|
|
|
|
end;
|
|
|
|
{ ON_KEY }
|
|
procedure the_application.on_key;
|
|
var
|
|
i : int;
|
|
fd : text;
|
|
|
|
buf : array[0..511 ] of char;
|
|
rgba : aggclr;
|
|
|
|
begin
|
|
if key = byte(' ' ) then
|
|
begin
|
|
AssignFile(fd ,'colors.dat' );
|
|
rewrite (fd );
|
|
|
|
for i:=0 to 255 do
|
|
begin
|
|
rgba.ConstrDbl(
|
|
double_ptr(ptrcomp(m_spline_r._spline ) + i * sizeof(double ) )^ ,
|
|
double_ptr(ptrcomp(m_spline_g._spline ) + i * sizeof(double ) )^ ,
|
|
double_ptr(ptrcomp(m_spline_b._spline ) + i * sizeof(double ) )^ ,
|
|
double_ptr(ptrcomp(m_spline_a._spline ) + i * sizeof(double ) )^ );
|
|
|
|
sprintf(@buf[0 ] ,' %3d, ' ,rgba.r );
|
|
sprintf(@buf[StrLen(@buf ) ] ,'%3d, ' ,rgba.g );
|
|
sprintf(@buf[StrLen(@buf ) ] ,'%3d, ' ,rgba.b );
|
|
sprintf(@buf[StrLen(@buf ) ] ,'%3d,' ,rgba.a );
|
|
|
|
writeln(fd ,PChar(@buf[0 ] ) );
|
|
|
|
end;
|
|
|
|
close(fd );
|
|
|
|
AssignFile(fd ,'profile.dat' );
|
|
rewrite (fd );
|
|
|
|
for i:=0 to 255 do
|
|
begin
|
|
sprintf(@buf[0 ] ,'%3d, ' ,int8u_ptr(ptrcomp(m_profile.gamma ) + i * sizeof(int8u ) )^ );
|
|
|
|
write(fd ,PChar(@buf[0 ] ) );
|
|
|
|
if (i and $F) = $F then
|
|
writeln(fd );
|
|
|
|
end;
|
|
|
|
close(fd );
|
|
|
|
end;
|
|
|
|
if key = key_f1 then
|
|
message_(
|
|
'This "sphere" is rendered with color gradients only. Initially there was an idea '#13 +
|
|
'to compensate so called Mach Bands effect. To do so I added a gradient profile '#13 +
|
|
'functor. Then the concept was extended to set a color profile. As a result you '#13 +
|
|
'can render simple geometrical objects in 2D looking like 3D ones. In this example '#13 +
|
|
'you can construct your own color profile and select the gradient function. '#13 +
|
|
'There''re not so many gradient functions in AGG, but you can easily add your own.'#13#13 +
|
|
'How to play with:'#13#13 +
|
|
'Use the left mouse button to drag the "gradient".'#13 +
|
|
'Use the right mouse button to scale and rotate the "gradient".'#13 +
|
|
'Press the spacebar to write down the "colors.dat" file.' +
|
|
#13#13'Note: F2 key saves current "screenshot" file in this demo''s directory. ' );
|
|
|
|
end;
|
|
|
|
VAR
|
|
app : the_application;
|
|
|
|
BEGIN
|
|
app.Construct(pix_format ,flip_y );
|
|
app.caption_ ('AGG gradients with Mach bands compensation (F1-Help)' );
|
|
|
|
if app.init(512 ,400 ,window_resize or window_hw_buffer ) then
|
|
app.run;
|
|
|
|
app.Destruct;
|
|
|
|
END. |