mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-05-01 17:43:38 +02:00
336 lines
7.1 KiB
ObjectPascal
336 lines
7.1 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
|
|
compositing2 ;
|
|
|
|
uses
|
|
agg_basics ,
|
|
agg_color ,
|
|
agg_platform_support ,
|
|
agg_ctrl ,
|
|
agg_slider_ctrl ,
|
|
agg_rbox_ctrl ,
|
|
agg_rendering_buffer ,
|
|
agg_rasterizer_scanline_aa ,
|
|
agg_scanline_u ,
|
|
agg_renderer_base ,
|
|
agg_renderer_scanline ,
|
|
agg_render_scanlines ,
|
|
agg_rounded_rect ,
|
|
agg_pixfmt ,
|
|
agg_pixfmt_rgba ,
|
|
agg_span_allocator ,
|
|
agg_span_gradient ,
|
|
agg_gsv_text ,
|
|
agg_span_interpolator_linear ,
|
|
agg_array ,
|
|
agg_trans_affine ,
|
|
agg_ellipse ,
|
|
agg_conv_transform ;
|
|
|
|
{$I agg_mode.inc }
|
|
|
|
const
|
|
flip_y = true;
|
|
|
|
type
|
|
the_application = object(platform_support )
|
|
private
|
|
m_alpha_dst ,
|
|
m_alpha_src : slider_ctrl;
|
|
m_comp_op : rbox_ctrl;
|
|
|
|
m_ramp1 ,
|
|
m_ramp2 : pod_auto_array;
|
|
|
|
m_ras : rasterizer_scanline_aa;
|
|
m_sl : scanline_u8;
|
|
|
|
public
|
|
constructor Construct(format_ : pix_format_e; flip_y_ : boolean );
|
|
destructor Destruct;
|
|
|
|
procedure radial_shape(
|
|
rbase : renderer_base_ptr;
|
|
colors : array_base_ptr;
|
|
x1 ,y1 ,x2 ,y2 : double );
|
|
|
|
procedure render_scene(rb : renderer_base_ptr );
|
|
|
|
procedure on_draw; virtual;
|
|
|
|
procedure on_key(x ,y : int; key ,flags : unsigned ); virtual;
|
|
|
|
end;
|
|
|
|
{ CONSTRUCT }
|
|
constructor the_application.Construct;
|
|
begin
|
|
inherited Construct(format_ ,flip_y_ );
|
|
|
|
m_alpha_dst.Construct(5 ,5 ,400 ,11 ,not flip_y_ );
|
|
m_alpha_src.Construct(5 ,5 + 15 ,400 ,11 + 15 ,not flip_y_ );
|
|
m_comp_op.Construct (420 ,5.0 ,420 + 170.0 ,395.0 ,not flip_y_ );
|
|
|
|
m_ramp1.Construct(256 ,sizeof(aggclr ) );
|
|
m_ramp2.Construct(256 ,sizeof(aggclr ) );
|
|
|
|
m_ras.Construct;
|
|
m_sl.Construct;
|
|
|
|
m_alpha_dst.label_('Dst Alpha=%.2f' );
|
|
m_alpha_dst.value_(1.0 );
|
|
|
|
add_ctrl(@m_alpha_dst );
|
|
|
|
m_alpha_src.label_('Src Alpha=%.2f' );
|
|
m_alpha_src.value_(1.0 );
|
|
|
|
add_ctrl(@m_alpha_src );
|
|
|
|
m_comp_op.text_size_(6.8 );
|
|
m_comp_op.add_item ('clear' );
|
|
m_comp_op.add_item ('src' );
|
|
m_comp_op.add_item ('dst' );
|
|
m_comp_op.add_item ('src-over' );
|
|
m_comp_op.add_item ('dst-over' );
|
|
m_comp_op.add_item ('src-in' );
|
|
m_comp_op.add_item ('dst-in' );
|
|
m_comp_op.add_item ('src-out' );
|
|
m_comp_op.add_item ('dst-out' );
|
|
m_comp_op.add_item ('src-atop' );
|
|
m_comp_op.add_item ('dst-atop' );
|
|
m_comp_op.add_item ('xor' );
|
|
m_comp_op.add_item ('plus' );
|
|
m_comp_op.add_item ('minus' );
|
|
m_comp_op.add_item ('multiply' );
|
|
m_comp_op.add_item ('screen' );
|
|
m_comp_op.add_item ('overlay' );
|
|
m_comp_op.add_item ('darken' );
|
|
m_comp_op.add_item ('lighten' );
|
|
m_comp_op.add_item ('color-dodge' );
|
|
m_comp_op.add_item ('color-burn' );
|
|
m_comp_op.add_item ('hard-light' );
|
|
m_comp_op.add_item ('soft-light' );
|
|
m_comp_op.add_item ('difference' );
|
|
m_comp_op.add_item ('exclusion' );
|
|
m_comp_op.add_item ('contrast' );
|
|
m_comp_op.add_item ('invert' );
|
|
m_comp_op.add_item ('invert-rgb' );
|
|
m_comp_op.cur_item_ (3 );
|
|
|
|
add_ctrl(@m_comp_op );
|
|
|
|
end;
|
|
|
|
{ DESTRUCT }
|
|
destructor the_application.Destruct;
|
|
begin
|
|
inherited Destruct;
|
|
|
|
m_alpha_dst.Destruct;
|
|
m_alpha_src.Destruct;
|
|
m_comp_op.Destruct;
|
|
|
|
m_ramp1.Destruct;
|
|
m_ramp2.Destruct;
|
|
|
|
m_ras.Destruct;
|
|
m_sl.Destruct;
|
|
|
|
end;
|
|
|
|
{ RADIAL_SHAPE }
|
|
procedure the_application.radial_shape;
|
|
var
|
|
gradient_func : gradient_radial;
|
|
gradient_mtx : trans_affine;
|
|
span_interpolator : span_interpolator_linear;
|
|
span_allocator_ : span_allocator;
|
|
span_gradient_ : span_gradient;
|
|
|
|
cx ,cy ,r : double;
|
|
|
|
tas : trans_affine_scaling;
|
|
tat : trans_affine_translation;
|
|
|
|
ell : ellipse;
|
|
|
|
trans : conv_transform;
|
|
|
|
rg : renderer_scanline_aa;
|
|
|
|
begin
|
|
gradient_func.Construct;
|
|
gradient_mtx.Construct;
|
|
span_interpolator.Construct(@gradient_mtx );
|
|
span_allocator_.Construct;
|
|
span_gradient_.Construct(
|
|
@span_allocator_ ,
|
|
@span_interpolator ,
|
|
@gradient_func ,
|
|
colors ,
|
|
0 ,100 );
|
|
|
|
cx:=(x1 + x2 ) / 2.0;
|
|
cy:=(y1 + y2 ) / 2.0;
|
|
|
|
if (x2 - x1 ) < (y2 - y1 ) then
|
|
r:=0.5 * (x2 - x1 )
|
|
else
|
|
r:=0.5 * (y2 - y1 );
|
|
|
|
tas.Construct (r / 100.0 );
|
|
gradient_mtx.multiply(@tas );
|
|
tat.Construct (cx ,cy );
|
|
gradient_mtx.multiply(@tat );
|
|
gradient_mtx.multiply(_trans_affine_resizing );
|
|
gradient_mtx.invert;
|
|
|
|
ell.Construct (cx ,cy ,r ,r ,100 );
|
|
trans.Construct(@ell ,_trans_affine_resizing );
|
|
|
|
m_ras.add_path(@trans );
|
|
rg.Construct (rbase ,@span_gradient_ );
|
|
|
|
render_scanlines(@m_ras ,@m_sl ,@rg );
|
|
|
|
span_allocator_.Destruct;
|
|
span_gradient_.Destruct;
|
|
|
|
end;
|
|
|
|
{ RENDER_SCENE }
|
|
procedure the_application.render_scene;
|
|
var
|
|
pixf : pixel_formats;
|
|
ren : renderer_base;
|
|
|
|
cx ,cy : double;
|
|
|
|
begin
|
|
pixfmt_custom_blend_rgba(pixf ,rbuf_window ,@comp_op_adaptor_rgba ,bgra_order );
|
|
|
|
ren.Construct(@pixf );
|
|
|
|
pixf.comp_op_(unsigned(comp_op_difference ) );
|
|
radial_shape (@ren ,@m_ramp1 ,50 ,50 ,50 + 320 ,50 + 320 );
|
|
|
|
pixf.comp_op_(m_comp_op._cur_item );
|
|
|
|
cx:=50;
|
|
cy:=50;
|
|
|
|
radial_shape(@ren ,@m_ramp2 ,cx + 120 - 70 ,cy + 120 - 70 ,cx + 120 + 70 ,cy + 120 + 70 );
|
|
radial_shape(@ren ,@m_ramp2 ,cx + 200 - 70 ,cy + 120 - 70 ,cx + 200 + 70 ,cy + 120 + 70 );
|
|
radial_shape(@ren ,@m_ramp2 ,cx + 120 - 70 ,cy + 200 - 70 ,cx + 120 + 70 ,cy + 200 + 70 );
|
|
radial_shape(@ren ,@m_ramp2 ,cx + 200 - 70 ,cy + 200 - 70 ,cx + 200 + 70 ,cy + 200 + 70 );
|
|
|
|
end;
|
|
|
|
{ generate_color_ramp }
|
|
procedure generate_color_ramp(c : pod_auto_array_ptr; c1 ,c2 ,c3 ,c4 : aggclr_ptr );
|
|
var
|
|
i : unsigned;
|
|
|
|
begin
|
|
i:=0;
|
|
|
|
while i < 85 do
|
|
begin
|
|
aggclr_ptr(c.array_operator(i ) )^:=c1.gradient(c2 ,i / 85.0 );
|
|
|
|
inc(i );
|
|
|
|
end;
|
|
|
|
while i < 170 do
|
|
begin
|
|
aggclr_ptr(c.array_operator(i ) )^:=c2.gradient(c3 ,(i - 85 ) / 85.0 );
|
|
|
|
inc(i );
|
|
|
|
end;
|
|
|
|
while i < 256 do
|
|
begin
|
|
aggclr_ptr(c.array_operator(i ) )^:=c3.gradient(c4 ,(i - 170 ) / 85.0 );
|
|
|
|
inc(i );
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
{ ON_DRAW }
|
|
procedure the_application.on_draw;
|
|
var
|
|
pixf : pixel_formats;
|
|
rgba : aggclr;
|
|
|
|
rb : renderer_base;
|
|
rs : renderer_scanline_aa_solid;
|
|
|
|
c1 ,c2 ,c3 ,c4 : aggclr;
|
|
|
|
begin
|
|
// Initialize structures
|
|
// pixfmt_alpha_blend_rgba(pixf ,rbuf_window ,bgra_order ); {!}
|
|
pixfmt_bgra32(pixf ,rbuf_window );
|
|
|
|
rb.Construct(@pixf );
|
|
rs.Construct(@rb );
|
|
|
|
rgba.ConstrInt(255 ,255 ,255 );
|
|
rb.clear (@rgba );
|
|
|
|
// Render
|
|
c1.ConstrDbl(0 ,0 ,0 ,m_alpha_dst._value );
|
|
c2.ConstrDbl(0 ,0 ,1 ,m_alpha_dst._value );
|
|
c3.ConstrDbl(0 ,1 ,0 ,m_alpha_dst._value );
|
|
c4.ConstrDbl(1 ,0 ,0 ,0 );
|
|
|
|
generate_color_ramp(@m_ramp1 ,@c1 ,@c2 ,@c3 ,@c4 );
|
|
|
|
c1.ConstrDbl(0 ,0 ,0 ,m_alpha_src._value );
|
|
c2.ConstrDbl(0 ,0 ,1 ,m_alpha_src._value );
|
|
c3.ConstrDbl(0 ,1 ,0 ,m_alpha_src._value );
|
|
c4.ConstrDbl(1 ,0 ,0 ,0 );
|
|
|
|
generate_color_ramp(@m_ramp2 ,@c1 ,@c2 ,@c3 ,@c4 );
|
|
|
|
render_scene(@rb );
|
|
|
|
// Render the controls
|
|
render_ctrl(@m_ras ,@m_sl ,@rs ,@m_alpha_dst );
|
|
render_ctrl(@m_ras ,@m_sl ,@rs ,@m_alpha_src );
|
|
render_ctrl(@m_ras ,@m_sl ,@rs ,@m_comp_op );
|
|
|
|
end;
|
|
|
|
{ ON_KEY }
|
|
procedure the_application.on_key;
|
|
begin
|
|
if key = key_f1 then
|
|
message_(
|
|
'Another demo example with extended compositing modes. ' );
|
|
|
|
end;
|
|
|
|
VAR
|
|
app : the_application;
|
|
|
|
BEGIN
|
|
app.Construct(pix_format_bgra32 ,flip_y );
|
|
app.caption_ ('AGG Example. Compositing Modes (F1-Help)' );
|
|
|
|
if app.init(600 ,400 ,window_resize or window_keep_aspect_ratio ) then
|
|
app.run;
|
|
|
|
app.Destruct;
|
|
|
|
END. |