lazarus/components/aggpas/aa_test.dpr
mattias 36a2b1ea07 added aggpas
git-svn-id: trunk@21942 -
2009-10-01 12:24:32 +00:00

804 lines
17 KiB
ObjectPascal

//
// 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
aa_test ;
uses
Math ,SysUtils ,
agg_basics ,
agg_platform_support ,
agg_color ,
agg_pixfmt ,
agg_pixfmt_rgb ,
agg_ctrl ,
agg_slider_ctrl ,
agg_cbox_ctrl ,
agg_renderer_base ,
agg_renderer_scanline ,
agg_rasterizer_scanline_aa ,
agg_scanline ,
agg_scanline_u ,
agg_render_scanlines ,
agg_gamma_lut ,
agg_gamma_functions ,
agg_vertex_source ,
agg_conv_stroke ,
agg_conv_dash ,
agg_math_stroke ,
agg_trans_affine ,
agg_span_gradient ,
agg_span_interpolator_linear ,
agg_span_gouraud_rgba ,
agg_span_allocator ,
agg_array ,
agg_ellipse ;
{$I agg_mode.inc }
const
flip_y = false;
type
simple_vertex_source = object(vertex_source )
m_num_vertices ,
m_count : unsigned;
m_x ,
m_y : array[0..7 ] of double;
m_cmd : array[0..7 ] of unsigned;
constructor Construct; overload;
constructor Construct(x1 ,y1 ,x2 ,y2 : double ); overload;
constructor Construct(x1 ,y1 ,x2 ,y2 ,x3 ,y3 : double ); overload;
procedure init(x1 ,y1 ,x2 ,y2 : double ); overload;
procedure init(x1 ,y1 ,x2 ,y2 ,x3 ,y3 : double ); overload;
procedure rewind(path_id : unsigned ); virtual;
function vertex(x ,y : double_ptr ) : unsigned; virtual;
end;
dashed_line = object
m_ras : rasterizer_scanline_aa_ptr;
m_ren : renderer_scanline_aa_solid_ptr;
m_sl : scanline_ptr;
m_src : simple_vertex_source;
m_dash : conv_dash;
m_stroke ,
m_dash_stroke : conv_stroke;
constructor Construct(ras : rasterizer_scanline_aa_ptr; ren : renderer_scanline_aa_solid_ptr; sl : scanline_ptr );
destructor Destruct;
procedure draw(x1 ,y1 ,x2 ,y2 ,line_width ,dash_length : double );
end;
the_application = object(platform_support )
m_gamma : gamma_lut;
m_slider_gamma : slider_ctrl;
constructor Construct(format_ : pix_format_e; flip_y_ : boolean );
destructor Destruct;
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;
{ min }
function min(a ,b : int ) : int;
begin
if a < b then
result:=a
else
result:=b;
end;
{ min_d }
function min_d(a ,b : double ) : double;
begin
if a < b then
result:=a
else
result:=b;
end;
{ frand }
function frand(x : double ) : double;
begin
result:=
((((Random($7fff ) shl 15 ) or Random($7fff ) ) and $3FFFFFFF) mod 1000000) * x / 1000000.0;
end;
{ calc_linear_gradient_transform }
// Calculate the affine transformation matrix for the linear gradient
// from (x1, y1) to (x2, y2). gradient_d2 is the "base" to scale the
// gradient. Here d1 must be 0.0, and d2 must equal gradient_d2.
procedure calc_linear_gradient_transform(
x1 ,y1 ,x2 ,y2 : double;
mtx : trans_affine_ptr;
gradient_d2 : double = 100.0 );
var
dx ,dy : double;
tas : trans_affine_scaling;
tar : trans_affine_rotation;
tat : trans_affine_translation;
begin
dx:=x2 - x1;
dy:=y2 - y1;
tas.Construct(Sqrt(dx * dx + dy * dy ) / gradient_d2 );
tar.Construct(ArcTan2(dy ,dx ) );
tat.Construct(x1 + 0.5 ,y1 + 0.5 );
mtx.reset;
mtx.multiply(@tas );
mtx.multiply(@tar );
mtx.multiply(@tat );
mtx.invert;
end;
{ fill_color_array }
// A simple function to form the gradient color array
// consisting of 3 colors, "begin", "middle", "end"
procedure fill_color_array(array_ : pod_auto_array_ptr; begin_ ,end_ : aggclr_ptr );
var
i : unsigned;
begin
for i:=0 to 255 do
aggclr_ptr(array_.array_operator(i ) )^:=begin_.gradient(end_ ,i / 255.0 );
end;
{ CONSTRUCT }
constructor simple_vertex_source.Construct;
begin
m_num_vertices:=0;
m_count :=0;
m_cmd[0 ]:=path_cmd_stop;
end;
{ CONSTRUCT }
constructor simple_vertex_source.Construct(x1 ,y1 ,x2 ,y2 : double );
begin
init(x1 ,y1 ,x2 ,y2 );
end;
{ CONSTRUCT }
constructor simple_vertex_source.Construct(x1 ,y1 ,x2 ,y2 ,x3 ,y3 : double );
begin
init(x1 ,y1 ,x2 ,y2 ,x3 ,y3 );
end;
{ INIT }
procedure simple_vertex_source.init(x1 ,y1 ,x2 ,y2 : double );
begin
m_num_vertices:=2;
m_count :=0;
m_x[0 ]:=x1;
m_y[0 ]:=y1;
m_x[1 ]:=x2;
m_y[1 ]:=y2;
m_cmd[0 ]:=path_cmd_move_to;
m_cmd[1 ]:=path_cmd_line_to;
m_cmd[2 ]:=path_cmd_stop;
end;
{ INIT }
procedure simple_vertex_source.init(x1 ,y1 ,x2 ,y2 ,x3 ,y3 : double );
begin
m_num_vertices:=3;
m_count :=0;
m_x[0 ]:=x1;
m_y[0 ]:=y1;
m_x[1 ]:=x2;
m_y[1 ]:=y2;
m_x[2 ]:=x3;
m_y[2 ]:=y3;
m_x[3 ]:=0.0;
m_y[3 ]:=0.0;
m_x[4 ]:=0.0;
m_y[4 ]:=0.0;
m_cmd[0 ]:=path_cmd_move_to;
m_cmd[1 ]:=path_cmd_line_to;
m_cmd[2 ]:=path_cmd_line_to;
m_cmd[3 ]:=path_cmd_end_poly or path_flags_close;
m_cmd[4 ]:=path_cmd_stop;
end;
{ REWIND }
procedure simple_vertex_source.rewind;
begin
m_count:=0;
end;
{ VERTEX }
function simple_vertex_source.vertex;
begin
x^:=m_x[m_count ];
y^:=m_y[m_count ];
result:=m_cmd[m_count ];
inc(m_count );
end;
{ CONSTRUCT }
constructor dashed_line.Construct;
begin
m_ras:=ras;
m_ren:=ren;
m_sl :=sl;
m_src.Construct;
m_dash.Construct (@m_src );
m_stroke.Construct (@m_src );
m_dash_stroke.Construct(@m_dash );
end;
{ DESTRUCT }
destructor dashed_line.Destruct;
begin
m_dash.Destruct;
m_stroke.Destruct;
m_dash_stroke.Destruct;
end;
{ DRAW }
procedure dashed_line.draw;
begin
m_src.init(x1 + 0.5 ,y1 + 0.5 ,x2 + 0.5 ,y2 + 0.5 );
m_ras.reset;
if dash_length > 0.0 then
begin
m_dash.remove_all_dashes;
m_dash.add_dash(dash_length ,dash_length );
m_dash_stroke.width_ (line_width );
m_dash_stroke.line_cap_(round_cap );
m_ras.add_path(@m_dash_stroke );
end
else
begin
m_stroke.width_ (line_width );
m_stroke.line_cap_(round_cap );
m_ras.add_path(@m_stroke );
end;
render_scanlines(m_ras ,m_sl ,m_ren );
end;
{ CONSTRUCT }
constructor the_application.Construct;
begin
inherited Construct(format_ ,flip_y_ );
m_gamma.Construct(1.0 );
m_slider_gamma.Construct(3 ,3 ,480 - 3 ,8 ,not flip_y_ );
add_ctrl(@m_slider_gamma );
m_slider_gamma.range_(0.1 ,3.0 );
m_slider_gamma.value_(1.6 );
m_slider_gamma.label_('Gamma=%4.3f' );
end;
{ DESTRUCT }
destructor the_application.Destruct;
begin
inherited Destruct;
m_gamma.Destruct;
m_slider_gamma.Destruct;
end;
{ ON_DRAW }
procedure the_application.on_draw;
var
pixf : pixel_formats;
ren_base : renderer_base;
ren_sl : renderer_scanline_aa_solid;
ras : rasterizer_scanline_aa;
sl : scanline_u8;
rgba ,
rgbb : aggclr;
gm_pw : gamma_power;
i : int;
dash : dashed_line;
cx ,cy ,n ,x1 ,y1 ,x2 ,y2 : double;
gradient_func : gradient_x; // The gradient function
gradient_mtx : trans_affine; // Affine transformer
span_interpolator : span_interpolator_linear; // Span interpolator
span_allocator_ : span_allocator; // Span Allocator
gradient_colors : pod_auto_array; // The gradient colors
span_gradient_ : span_gradient;
ren_gradient : renderer_scanline_aa;
dash_gradient : dashed_line;
ell : ellipse;
begin
// Initialize structures
pixfmt_bgr24_gamma(pixf ,rbuf_window ,@m_gamma );
ren_base.Construct(@pixf );
ren_sl.Construct (@ren_base );
ras.Construct;
sl.Construct;
rgba.ConstrInt(0 ,0 ,0 );
ren_base.clear(@rgba );
// gamma correction
m_gamma.gamma_(m_slider_gamma._value );
// radial line test
dash.Construct(@ras ,@ren_sl ,@sl );
cx:=_width / 2.0;
cy:=_height / 2.0;
rgba.ConstrDbl(1.0 ,1.0 ,1.0 ,0.2 );
ren_sl.color_ (@rgba );
for i:=180 downto 1 do
begin
n:=2.0 * pi * i / 180.0;
if i < 90 then
dash.draw(
cx + min_d(cx ,cy ) * Sin(n ) ,
cy + min_d(cx ,cy ) * Cos(n ) ,
cx ,cy ,1.0 ,i )
else
dash.draw(
cx + min_d(cx ,cy ) * Sin(n ) ,
cy + min_d(cx ,cy ) * Cos(n ) ,
cx ,cy ,1.0 ,0.0 );
end;
// Initialize gradients
gradient_func.Construct;
gradient_mtx.Construct;
span_interpolator.Construct(@gradient_mtx );
span_allocator_.Construct;
gradient_colors.Construct(256 ,sizeof(aggclr ) );
span_gradient_.Construct(
@span_allocator_ ,
@span_interpolator ,
@gradient_func ,
@gradient_colors ,
0 ,100 );
ren_gradient.Construct (@ren_base ,@span_gradient_ );
dash_gradient.Construct(@ras ,@ren_gradient ,@sl );
ell.Construct;
// Top patterns
for i:=1 to 20 do
begin
rgba.ConstrDbl(1 ,1 ,1 );
ren_sl.color_ (@rgba );
// integral point sizes 1..20
ell.init(20 + i * (i + 1 ) + 0.5 ,20.5 ,i / 2.0 ,i / 2.0 ,8 + i );
ras.reset;
ras.add_path(@ell );
render_scanlines(@ras ,@sl ,@ren_sl );
// fractional point sizes 0..2
ell.init(18 + i * 4 + 0.5 ,33 + 0.5 ,i / 20.0 ,i / 20.0 ,8 );
ras.reset;
ras.add_path(@ell );
render_scanlines(@ras ,@sl ,@ren_sl );
// fractional point positioning
ell.init(
18 + i * 4 + (i - 1 ) / 10.0 + 0.5 ,
27 + (i - 1 ) / 10.0 + 0.5 ,
0.5 ,0.5 ,8 );
ras.reset;
ras.add_path(@ell );
render_scanlines(@ras ,@sl ,@ren_sl );
// integral line widths 1..20
rgba.ConstrDbl (1 ,1 ,1 );
rgbb.ConstrDbl (i mod 2 ,(i mod 3 ) * 0.5 ,(i mod 5 ) * 0.25 );
fill_color_array(@gradient_colors ,@rgba ,@rgbb );
x1:=20 + i* (i + 1 );
y1:=40.5;
x2:=20 + i * (i + 1 ) + (i - 1 ) * 4;
y2:=100.5;
calc_linear_gradient_transform(x1 ,y1 ,x2 ,y2 ,@gradient_mtx );
dash_gradient.draw (x1 ,y1 ,x2 ,y2 ,i ,0 );
rgba.ConstrDbl (1 ,0 ,0 );
rgbb.ConstrDbl (0 ,0 ,1 );
fill_color_array(@gradient_colors ,@rgba ,@rgbb );
// fractional line lengths H (red/blue)
x1:=17.5 + i * 4;
y1:=107;
x2:=17.5 + i * 4 + i / 6.66666667;
y2:=107;
calc_linear_gradient_transform(x1 ,y1 ,x2 ,y2 ,@gradient_mtx );
dash_gradient.draw (x1 ,y1 ,x2 ,y2 ,1.0 ,0 );
// fractional line lengths V (red/blue)
x1:=18 + i * 4;
y1:=112.5;
x2:=18 + i * 4;
y2:=112.5 + i / 6.66666667;
calc_linear_gradient_transform(x1 ,y1 ,x2 ,y2 ,@gradient_mtx );
dash_gradient.draw (x1 ,y1 ,x2 ,y2 ,1.0 ,0 );
// fractional line positioning (red)
rgba.ConstrDbl (1 ,0 ,0 );
rgbb.ConstrDbl (1 ,1 ,1 );
fill_color_array(@gradient_colors ,@rgba ,@rgbb );
x1:=21.5;
y1:=120 + (i - 1 ) * 3.1;
x2:=52.5;
y2:=120 + (i - 1 ) * 3.1;
calc_linear_gradient_transform(x1 ,y1 ,x2 ,y2 ,@gradient_mtx );
dash_gradient.draw (x1 ,y1 ,x2 ,y2 ,1.0 ,0 );
// fractional line width 2..0 (green)
rgba.ConstrDbl (0 ,1 ,0 );
rgbb.ConstrDbl (1 ,1 ,1 );
fill_color_array(@gradient_colors ,@rgba ,@rgbb );
x1:=52.5;
y1:=118 + i * 3;
x2:=83.5;
y2:=118 + i * 3;
calc_linear_gradient_transform(x1 ,y1 ,x2 ,y2 ,@gradient_mtx );
dash_gradient.draw (x1 ,y1 ,x2 ,y2 ,2.0 - (i - 1 ) / 10.0 ,0 );
// stippled fractional width 2..0 (blue)
rgba.ConstrDbl (0 ,0 ,1 );
rgbb.ConstrDbl (1 ,1 ,1 );
fill_color_array(@gradient_colors ,@rgba ,@rgbb );
x1:=83.5;
y1:=119 + i * 3;
x2:=114.5;
y2:=119 + i * 3;
calc_linear_gradient_transform(x1 ,y1 ,x2 ,y2 ,@gradient_mtx );
dash_gradient.draw (x1 ,y1 ,x2 ,y2 ,2.0 - (i - 1 ) / 10.0, 3.0 );
// integral line width, horz aligned (mipmap test)
rgba.ConstrDbl(1 ,1 ,1 );
ren_sl.color_ (@rgba );
if i <= 10 then
dash.draw(
125.5 ,119.5 + (i + 2 ) * (i / 2.0 ) ,
135.5 ,119.5 + (i + 2 ) * (i / 2.0 ) ,i ,0.0 );
// fractional line width 0..2, 1 px H
//-----------------
dash.draw(17.5 + i * 4 ,192 ,18.5 + i * 4 ,192 ,i / 10.0 ,0 );
// fractional line positioning, 1 px H
//-----------------
dash.draw(
17.5 + i * 4 + (i - 1 ) / 10.0 ,186 ,
18.5 + i * 4 + (i - 1 ) / 10.0 ,186 ,
1.0 ,0 );
end;
// Triangles
for i:=1 to 13 do
begin
rgba.ConstrDbl (1 ,1 ,1 );
rgbb.ConstrDbl (i mod 2 ,(i mod 3 ) * 0.5 ,(i mod 5 ) * 0.25 );
fill_color_array(@gradient_colors ,@rgba ,@rgbb );
calc_linear_gradient_transform(
_width - 150 ,
_height - 20 - i * (i + 1.5 ) ,
_width - 20,
_height - 20 - i * (i + 1 ) ,
@gradient_mtx );
ras.reset;
ras.move_to_d(_width - 150 ,_height - 20 - i * (i + 1.5 ) );
ras.line_to_d(_width - 20 ,_height - 20 - i * (i + 1 ) );
ras.line_to_d(_width - 20 ,_height - 20 - i * (i + 2 ) );
render_scanlines(@ras ,@sl ,@ren_gradient );
end;
// Reset AA Gamma and render the controls
gm_pw.Construct(1.0 );
ras.gamma (@gm_pw );
render_ctrl(@ras ,@sl ,@ren_sl ,@m_slider_gamma );
// Free AGG resources
ras.Destruct;
sl.Destruct;
dash.Destruct;
span_allocator_.Destruct;
gradient_colors.Destruct;
dash_gradient.Destruct;
end;
{ ON_MOUSE_MOVE }
procedure the_application.on_mouse_move;
begin
end;
{ ON_MOUSE_BUTTON_DOWN }
procedure the_application.on_mouse_button_down;
var
pixf : pixel_formats;
ren_base : renderer_base;
ren_sl : renderer_scanline_aa_solid;
ras : rasterizer_scanline_aa;
sl : scanline_u8;
rgba ,
rgbb ,
rgbc : aggclr;
i : int;
w ,h ,t1 ,t2 ,t3 ,r ,x1 ,y1 ,x2 ,y2 ,x3 ,y3 : double;
ell : ellipse;
buf : array[0..255 ] of char;
gradient_func : gradient_x; // The gradient function
gradient_mtx : trans_affine; // Affine transformer
span_interpolator : span_interpolator_linear; // Span interpolator
span_allocator_ : span_allocator; // Span Allocator
gradient_colors : pod_auto_array; // The gradient colors
span_gradient_ : span_gradient;
ren_gradient : renderer_scanline_aa;
dash_gradient : dashed_line;
span_gouraud : span_gouraud_rgba;
ren_gouraud : renderer_scanline_aa;
begin
RandSeed:=123;
// Initialize structures
pixfmt_bgr24_gamma(pixf ,rbuf_window ,@m_gamma );
ren_base.Construct(@pixf );
ren_sl.Construct (@ren_base );
ras.Construct;
sl.Construct;
rgba.ConstrInt(0 ,0 ,0 );
ren_base.clear(@rgba );
w:=_width;
h:=_height;
ell.Construct;
// Points
start_timer;
for i:=0 to 20000 - 1 do
begin
r:=frand(20.0 ) + 1.0;
ell.init(frand(w ) ,frand(h ) ,r / 2 ,r / 2 ,trunc(r ) + 10 );
ras.reset;
ras.add_path(@ell );
render_scanlines(@ras ,@sl ,@ren_sl );
rgba.ConstrDbl(frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) ,0.5 + frand(0.5 ) );
ren_sl.color_ (@rgba );
end;
t1:=elapsed_time;
// Strokes
gradient_func.Construct;
gradient_mtx.Construct;
span_interpolator.Construct(@gradient_mtx );
span_allocator_.Construct;
gradient_colors.Construct(256 ,sizeof(aggclr ) );
span_gradient_.Construct(
@span_allocator_ ,
@span_interpolator ,
@gradient_func ,
@gradient_colors ,
0 ,100 );
ren_gradient.Construct (@ren_base ,@span_gradient_ );
dash_gradient.Construct(@ras ,@ren_gradient ,@sl );
start_timer;
for i:=0 to 2000 - 1 do
begin
x1:=frand(w );
y1:=frand(h );
x2:=x1 + frand(w * 0.5 ) - w * 0.25;
y2:=y1 + frand(h * 0.5 ) - h * 0.25;
rgba.ConstrDbl (frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) ,0.5 + frand(0.5 ) );
rgbb.ConstrDbl (frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) );
fill_color_array(@gradient_colors ,@rgba ,@rgbb );
calc_linear_gradient_transform(x1 ,y1 ,x2 ,y2 ,@gradient_mtx );
dash_gradient.draw (x1 ,y1 ,x2 ,y2 ,10.0 ,0 );
end;
t2:=elapsed_time;
// Gouraud triangles
span_gouraud.Construct(@span_allocator_ );
ren_gouraud.Construct (@ren_base ,@span_gouraud );
start_timer;
for i:=0 to 2000 - 1 do
begin
x1:=frand(w );
y1:=frand(h );
x2:=x1 + frand(w * 0.4 ) - w * 0.2;
y2:=y1 + frand(h * 0.4 ) - h * 0.2;
x3:=x1 + frand(w * 0.4 ) - w * 0.2;
y3:=y1 + frand(h * 0.4 ) - h * 0.2;
rgba.ConstrDbl (frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) ,0.5 + frand(0.5 ) );
rgbb.ConstrDbl (frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) );
rgbc.ConstrDbl (frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) ,frand(1.0 ) );
span_gouraud.colors_ (@rgba ,@rgbb ,@rgbc );
span_gouraud.triangle(x1 ,y1 ,x2 ,y2 ,x3 ,y3 ,0.0 );
ras.add_path(@span_gouraud );
render_scanlines(@ras ,@sl ,@ren_gouraud );
end;
t3:=elapsed_time;
// Test results & Update
sprintf (@buf[0 ] ,'Points=%.2fK/sec, '#0 ,20000.0 / t1 );
sprintf (@buf[StrLen(@buf[0 ] ) ] ,'Lines=%.2fK/sec, '#0 ,2000.0 / t2 );
sprintf (@buf[StrLen(@buf[0 ] ) ] ,'Triangles=%.2fK/sec'#0 ,2000.0 / t3 );
message_(@buf[0 ] );
update_window;
// Free AGG resources
ras.Destruct;
sl.Destruct;
span_allocator_.Destruct;
gradient_colors.Destruct;
dash_gradient.Destruct;
end;
{ ON_MOUSE_BUTTON_UP }
procedure the_application.on_mouse_button_up;
begin
end;
{ ON_KEY }
procedure the_application.on_key;
begin
if key = key_f1 then
message_(
'A test of Anti-Aliasing the same as in'#13 +
'http://homepage.mac.com/arekkusu/bugs/invariance'#13 +
'The performance of AGG on a typical P-IV 2GHz is:'#13 +
'Points: 37.46K/sec, Lines: 5.04K/sec, Triangles: 7.43K/sec'#13#13 +
'How to play with:'#13#13 +
'Click any mouse button to run the performance test.'#13+
'Then, after you''ll see the triangles, resize the window'#13 +
'to return to the original rendering.' +
#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. Anti-Aliasing Test (F1-Help)' );
if app.init(480 ,350 ,window_resize ) then
app.run;
app.Destruct;
END.