2
// AggPas 2.4 RM3 Demo application
3
// Note: Press F1 key on run to see more info about this demo
5
// Paths: src;src\ctrl;src\svg;src\util;src\platform\win;expat-wrap
13
agg_platform_support ,
17
agg_rendering_buffer ,
18
agg_rasterizer_scanline_aa ,
21
agg_renderer_scanline ,
22
agg_render_scanlines ,
29
agg_span_interpolator_linear ,
41
the_application = object(platform_support )
44
m_alpha_src : slider_ctrl;
45
m_comp_op : rbox_ctrl;
48
m_ramp2 : pod_auto_array;
50
m_ras : rasterizer_scanline_aa;
54
constructor Construct(format_ : pix_format_e; flip_y_ : boolean );
57
procedure radial_shape(
58
rbase : renderer_base_ptr;
59
colors : array_base_ptr;
60
x1 ,y1 ,x2 ,y2 : double );
62
procedure render_scene(rb : renderer_base_ptr );
64
procedure on_draw; virtual;
66
procedure on_key(x ,y : int; key ,flags : unsigned ); virtual;
71
constructor the_application.Construct;
73
inherited Construct(format_ ,flip_y_ );
75
m_alpha_dst.Construct(5 ,5 ,400 ,11 ,not flip_y_ );
76
m_alpha_src.Construct(5 ,5 + 15 ,400 ,11 + 15 ,not flip_y_ );
77
m_comp_op.Construct (420 ,5.0 ,420 + 170.0 ,395.0 ,not flip_y_ );
79
m_ramp1.Construct(256 ,sizeof(aggclr ) );
80
m_ramp2.Construct(256 ,sizeof(aggclr ) );
85
m_alpha_dst.label_('Dst Alpha=%.2f' );
86
m_alpha_dst.value_(1.0 );
88
add_ctrl(@m_alpha_dst );
90
m_alpha_src.label_('Src Alpha=%.2f' );
91
m_alpha_src.value_(1.0 );
93
add_ctrl(@m_alpha_src );
95
m_comp_op.text_size_(6.8 );
96
m_comp_op.add_item ('clear' );
97
m_comp_op.add_item ('src' );
98
m_comp_op.add_item ('dst' );
99
m_comp_op.add_item ('src-over' );
100
m_comp_op.add_item ('dst-over' );
101
m_comp_op.add_item ('src-in' );
102
m_comp_op.add_item ('dst-in' );
103
m_comp_op.add_item ('src-out' );
104
m_comp_op.add_item ('dst-out' );
105
m_comp_op.add_item ('src-atop' );
106
m_comp_op.add_item ('dst-atop' );
107
m_comp_op.add_item ('xor' );
108
m_comp_op.add_item ('plus' );
109
m_comp_op.add_item ('minus' );
110
m_comp_op.add_item ('multiply' );
111
m_comp_op.add_item ('screen' );
112
m_comp_op.add_item ('overlay' );
113
m_comp_op.add_item ('darken' );
114
m_comp_op.add_item ('lighten' );
115
m_comp_op.add_item ('color-dodge' );
116
m_comp_op.add_item ('color-burn' );
117
m_comp_op.add_item ('hard-light' );
118
m_comp_op.add_item ('soft-light' );
119
m_comp_op.add_item ('difference' );
120
m_comp_op.add_item ('exclusion' );
121
m_comp_op.add_item ('contrast' );
122
m_comp_op.add_item ('invert' );
123
m_comp_op.add_item ('invert-rgb' );
124
m_comp_op.cur_item_ (3 );
126
add_ctrl(@m_comp_op );
131
destructor the_application.Destruct;
135
m_alpha_dst.Destruct;
136
m_alpha_src.Destruct;
148
procedure the_application.radial_shape;
150
gradient_func : gradient_radial;
151
gradient_mtx : trans_affine;
152
span_interpolator : span_interpolator_linear;
153
span_allocator_ : span_allocator;
154
span_gradient_ : span_gradient;
158
tas : trans_affine_scaling;
159
tat : trans_affine_translation;
163
trans : conv_transform;
165
rg : renderer_scanline_aa;
168
gradient_func.Construct;
169
gradient_mtx.Construct;
170
span_interpolator.Construct(@gradient_mtx );
171
span_allocator_.Construct;
172
span_gradient_.Construct(
179
cx:=(x1 + x2 ) / 2.0;
180
cy:=(y1 + y2 ) / 2.0;
182
if (x2 - x1 ) < (y2 - y1 ) then
187
tas.Construct (r / 100.0 );
188
gradient_mtx.multiply(@tas );
189
tat.Construct (cx ,cy );
190
gradient_mtx.multiply(@tat );
191
gradient_mtx.multiply(_trans_affine_resizing );
194
ell.Construct (cx ,cy ,r ,r ,100 );
195
trans.Construct(@ell ,_trans_affine_resizing );
197
m_ras.add_path(@trans );
198
rg.Construct (rbase ,@span_gradient_ );
200
render_scanlines(@m_ras ,@m_sl ,@rg );
202
span_allocator_.Destruct;
203
span_gradient_.Destruct;
208
procedure the_application.render_scene;
210
pixf : pixel_formats;
216
pixfmt_custom_blend_rgba(pixf ,rbuf_window ,@comp_op_adaptor_rgba ,bgra_order );
218
ren.Construct(@pixf );
220
pixf.comp_op_(unsigned(comp_op_difference ) );
221
radial_shape (@ren ,@m_ramp1 ,50 ,50 ,50 + 320 ,50 + 320 );
223
pixf.comp_op_(m_comp_op._cur_item );
228
radial_shape(@ren ,@m_ramp2 ,cx + 120 - 70 ,cy + 120 - 70 ,cx + 120 + 70 ,cy + 120 + 70 );
229
radial_shape(@ren ,@m_ramp2 ,cx + 200 - 70 ,cy + 120 - 70 ,cx + 200 + 70 ,cy + 120 + 70 );
230
radial_shape(@ren ,@m_ramp2 ,cx + 120 - 70 ,cy + 200 - 70 ,cx + 120 + 70 ,cy + 200 + 70 );
231
radial_shape(@ren ,@m_ramp2 ,cx + 200 - 70 ,cy + 200 - 70 ,cx + 200 + 70 ,cy + 200 + 70 );
235
{ generate_color_ramp }
236
procedure generate_color_ramp(c : pod_auto_array_ptr; c1 ,c2 ,c3 ,c4 : aggclr_ptr );
245
aggclr_ptr(c.array_operator(i ) )^:=c1.gradient(c2 ,i / 85.0 );
253
aggclr_ptr(c.array_operator(i ) )^:=c2.gradient(c3 ,(i - 85 ) / 85.0 );
261
aggclr_ptr(c.array_operator(i ) )^:=c3.gradient(c4 ,(i - 170 ) / 85.0 );
270
procedure the_application.on_draw;
272
pixf : pixel_formats;
276
rs : renderer_scanline_aa_solid;
278
c1 ,c2 ,c3 ,c4 : aggclr;
281
// Initialize structures
282
// pixfmt_alpha_blend_rgba(pixf ,rbuf_window ,bgra_order ); {!}
283
pixfmt_bgra32(pixf ,rbuf_window );
285
rb.Construct(@pixf );
288
rgba.ConstrInt(255 ,255 ,255 );
292
c1.ConstrDbl(0 ,0 ,0 ,m_alpha_dst._value );
293
c2.ConstrDbl(0 ,0 ,1 ,m_alpha_dst._value );
294
c3.ConstrDbl(0 ,1 ,0 ,m_alpha_dst._value );
295
c4.ConstrDbl(1 ,0 ,0 ,0 );
297
generate_color_ramp(@m_ramp1 ,@c1 ,@c2 ,@c3 ,@c4 );
299
c1.ConstrDbl(0 ,0 ,0 ,m_alpha_src._value );
300
c2.ConstrDbl(0 ,0 ,1 ,m_alpha_src._value );
301
c3.ConstrDbl(0 ,1 ,0 ,m_alpha_src._value );
302
c4.ConstrDbl(1 ,0 ,0 ,0 );
304
generate_color_ramp(@m_ramp2 ,@c1 ,@c2 ,@c3 ,@c4 );
308
// Render the controls
309
render_ctrl(@m_ras ,@m_sl ,@rs ,@m_alpha_dst );
310
render_ctrl(@m_ras ,@m_sl ,@rs ,@m_alpha_src );
311
render_ctrl(@m_ras ,@m_sl ,@rs ,@m_comp_op );
316
procedure the_application.on_key;
320
'Another demo example with extended compositing modes. ' );
325
app : the_application;
328
app.Construct(pix_format_bgra32 ,flip_y );
329
app.caption_ ('AGG Example. Compositing Modes (F1-Help)' );
331
if app.init(600 ,400 ,window_resize or window_keep_aspect_ratio ) then
b'\\ No newline at end of file'