mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-04-28 09:03:50 +02:00
576 lines
12 KiB
ObjectPascal
576 lines
12 KiB
ObjectPascal
{mac_copy:compositing.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
|
|
compositing ;
|
|
|
|
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_math ,
|
|
agg_array ,
|
|
agg_ellipse ,
|
|
agg_conv_stroke ,
|
|
agg_trans_affine ,
|
|
agg_rounded_rect ,
|
|
agg_span_gradient ,
|
|
agg_span_allocator ,
|
|
agg_gsv_text ,
|
|
agg_span_interpolator_linear ,
|
|
file_utils_ ;
|
|
|
|
{$I agg_mode.inc }
|
|
|
|
const
|
|
flip_y = true;
|
|
|
|
base_shift = agg_color.base_shift;
|
|
|
|
type
|
|
gradient_linear_color = object(array_base )
|
|
m_c1 ,
|
|
m_c2 ,
|
|
m_res : aggclr;
|
|
|
|
constructor Construct; overload;
|
|
constructor Construct(c1 ,c2 : aggclr_ptr ); overload;
|
|
|
|
procedure colors(c1 ,c2 : aggclr_ptr );
|
|
|
|
function size : unsigned; virtual;
|
|
function array_operator(i : unsigned ) : pointer; virtual;
|
|
|
|
end;
|
|
|
|
the_application = object(platform_support )
|
|
m_alpha_src ,
|
|
m_alpha_dst : slider_ctrl;
|
|
m_comp_op : rbox_ctrl;
|
|
|
|
constructor Construct(format_ : pix_format_e; flip_y_ : boolean );
|
|
destructor Destruct;
|
|
|
|
procedure render_scene(rbuf : rendering_buffer_ptr; pixf : pixel_formats_ptr );
|
|
|
|
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;
|
|
|
|
{ gradient_affine }
|
|
procedure gradient_affine(var mtx : trans_affine; x1 ,y1 ,x2 ,y2 : double; gradient_d2 : double = 100.0 );
|
|
var
|
|
dx ,dy : double;
|
|
|
|
tas : trans_affine_scaling;
|
|
tar : trans_affine_rotation;
|
|
tat : trans_affine_translation;
|
|
|
|
begin
|
|
mtx.Construct;
|
|
|
|
dx:=x2 - x1;
|
|
dy:=y2 - y1;
|
|
|
|
mtx.reset;
|
|
|
|
tas.Construct(Sqrt(dx * dx + dy * dy ) / gradient_d2 ); mtx.multiply(@tas );
|
|
tar.Construct(ArcTan2(dy ,dx ) ); mtx.multiply(@tar );
|
|
tat.Construct(x1 ,y1 ); mtx.multiply(@tat );
|
|
|
|
mtx.invert;
|
|
|
|
end;
|
|
|
|
{ circle }
|
|
procedure circle(rbase : renderer_base_ptr; c1 ,c2 : aggclr_ptr; x1 ,y1 ,x2 ,y2 ,shadow_alpha : double );
|
|
var
|
|
color_func : gradient_linear_color;
|
|
|
|
gradient_func : gradient_x;
|
|
gradient_mtx : trans_affine;
|
|
span_gradient_ : span_gradient;
|
|
ren_gradient : renderer_scanline_aa;
|
|
ren_solid : renderer_scanline_aa_solid;
|
|
|
|
span_interpolator : span_interpolator_linear;
|
|
span_allocator_ : span_allocator;
|
|
|
|
rgba : aggclr;
|
|
|
|
ras : rasterizer_scanline_aa;
|
|
sl : scanline_u8;
|
|
ell : ellipse;
|
|
|
|
r : double;
|
|
|
|
begin
|
|
gradient_func.Construct; // The gradient function
|
|
gradient_affine(gradient_mtx ,x1 ,y1 ,x2 ,y2 ,100 );
|
|
|
|
span_interpolator.Construct(@gradient_mtx ); // Span interpolator
|
|
span_allocator_.Construct; // Span Allocator
|
|
color_func.Construct(c1 ,c2 );
|
|
|
|
span_gradient_.Construct(
|
|
@span_allocator_ ,
|
|
@span_interpolator,
|
|
@gradient_func,
|
|
@color_func,
|
|
0 ,100 );
|
|
|
|
ren_gradient.Construct(rbase ,@span_gradient_ );
|
|
ras.Construct;
|
|
sl.Construct;
|
|
|
|
r:=calc_distance(x1 ,y1 ,x2 ,y2 ) / 2;
|
|
|
|
ell.Construct ((x1 + x2 ) / 2 + 5 ,(y1 + y2 ) / 2 - 3 ,r ,r ,100 );
|
|
ren_solid.Construct(rbase );
|
|
rgba.ConstrDbl (0.6 ,0.6 ,0.6 ,0.7 * shadow_alpha );
|
|
ren_solid.color_ (@rgba );
|
|
ras.add_path (@ell );
|
|
render_scanlines (@ras ,@sl ,@ren_solid );
|
|
|
|
ell.init ((x1 + x2 ) / 2 ,(y1 + y2 ) / 2 ,r ,r ,100 );
|
|
ras.add_path (@ell );
|
|
render_scanlines(@ras ,@sl ,@ren_gradient );
|
|
|
|
// Free
|
|
ras.Destruct;
|
|
sl.Destruct;
|
|
span_allocator_.Destruct;
|
|
|
|
end;
|
|
|
|
{ dst_shape }
|
|
procedure dst_shape(rbase : renderer_base_ptr; c1 ,c2 : aggclr_ptr; x1 ,y1 ,x2 ,y2 : double );
|
|
var
|
|
color_func : gradient_linear_color;
|
|
shape : rounded_rect;
|
|
|
|
gradient_func : gradient_x;
|
|
gradient_mtx : trans_affine;
|
|
ren_gradient : renderer_scanline_aa;
|
|
|
|
span_interpolator : span_interpolator_linear;
|
|
span_allocator_ : span_allocator;
|
|
span_gradient_ : span_gradient;
|
|
|
|
ras : rasterizer_scanline_aa;
|
|
sl : scanline_u8;
|
|
|
|
begin
|
|
gradient_func.Construct; // The gradient function
|
|
gradient_affine(gradient_mtx ,x1 ,y1 ,x2 ,y2 ,100 );
|
|
|
|
span_interpolator.Construct(@gradient_mtx); // Span interpolator
|
|
span_allocator_.Construct; // Span Allocator
|
|
color_func.Construct(c1 ,c2 );
|
|
|
|
span_gradient_.Construct(
|
|
@span_allocator_ ,
|
|
@span_interpolator ,
|
|
@gradient_func ,
|
|
@color_func ,
|
|
0 ,100 );
|
|
|
|
ren_gradient.Construct(rbase ,@span_gradient_ );
|
|
ras.Construct;
|
|
sl.Construct;
|
|
|
|
shape.Construct (x1 ,y1 ,x2 ,y2 ,40 );
|
|
ras.add_path (@shape );
|
|
render_scanlines(@ras ,@sl ,@ren_gradient );
|
|
|
|
// Free
|
|
ras.Destruct;
|
|
sl.Destruct;
|
|
span_allocator_.Destruct;
|
|
|
|
end;
|
|
|
|
{ CONSTRUCT }
|
|
constructor gradient_linear_color.Construct;
|
|
begin
|
|
m_c1.Construct;
|
|
m_c2.Construct;
|
|
m_res.Construct;
|
|
|
|
end;
|
|
|
|
{ CONSTRUCT }
|
|
constructor gradient_linear_color.Construct(c1 ,c2 : aggclr_ptr );
|
|
begin
|
|
m_res.Construct;
|
|
|
|
m_c1:=c1^;
|
|
m_c2:=c2^;
|
|
|
|
end;
|
|
|
|
{ COLORS }
|
|
procedure gradient_linear_color.colors;
|
|
begin
|
|
m_c1:=c1^;
|
|
m_c2:=c2^;
|
|
|
|
end;
|
|
|
|
{ SIZE }
|
|
function gradient_linear_color.size;
|
|
begin
|
|
result:=256
|
|
|
|
end;
|
|
|
|
{ ARRAY_OPERATOR }
|
|
function gradient_linear_color.array_operator;
|
|
begin
|
|
i:=i shl (base_shift - 8 );
|
|
|
|
m_res.r:=int8u((((m_c2.r - m_c1.r ) * i ) + (m_c1.r shl base_shift ) ) shr base_shift );
|
|
m_res.g:=int8u((((m_c2.g - m_c1.g ) * i ) + (m_c1.g shl base_shift ) ) shr base_shift );
|
|
m_res.b:=int8u((((m_c2.b - m_c1.b ) * i ) + (m_c1.b shl base_shift ) ) shr base_shift );
|
|
m_res.a:=int8u((((m_c2.a - m_c1.a ) * i ) + (m_c1.a shl base_shift ) ) shr base_shift );
|
|
|
|
result:=@m_res;
|
|
|
|
end;
|
|
|
|
{ CONSTRUCT }
|
|
constructor the_application.Construct;
|
|
begin
|
|
inherited Construct(format_ ,flip_y_ );
|
|
|
|
m_alpha_src.Construct(5 ,5 ,400 ,11 ,not flip_y_ );
|
|
m_alpha_dst.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_alpha_src.label_('Src Alpha=%.2f' );
|
|
m_alpha_src.value_(1.0 );
|
|
|
|
add_ctrl(@m_alpha_src );
|
|
|
|
m_alpha_dst.label_('Dst Alpha=%.2f' );
|
|
m_alpha_dst.value_(0.75 );
|
|
|
|
add_ctrl(@m_alpha_dst );
|
|
|
|
m_comp_op.text_size_(7 );
|
|
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.cur_item_(3 );
|
|
|
|
add_ctrl(@m_comp_op );
|
|
|
|
end;
|
|
|
|
{ DESTRUCT }
|
|
destructor the_application.Destruct;
|
|
begin
|
|
inherited Destruct;
|
|
|
|
m_alpha_src.Destruct;
|
|
m_alpha_dst.Destruct;
|
|
m_comp_op.Destruct;
|
|
|
|
end;
|
|
|
|
{ RENDER_SCENE }
|
|
procedure the_application.render_scene;
|
|
var
|
|
ren_pixf ,px : pixel_formats;
|
|
renderer ,rb : renderer_base;
|
|
|
|
rgba ,rgbb : aggclr;
|
|
|
|
v : double;
|
|
|
|
begin
|
|
pixfmt_custom_blend_rgba(ren_pixf ,rbuf ,@comp_op_adaptor_rgba ,bgra_order );
|
|
|
|
renderer.Construct(@ren_pixf );
|
|
rb.Construct (pixf );
|
|
|
|
pixfmt_bgra32(px ,rbuf_img(1 ) );
|
|
rb.blend_from(@px ,NIL ,250 ,180 ,unsigned(trunc(m_alpha_src._value * 255 ) ) );
|
|
|
|
rgba.ConstrInt($FD ,$F0 ,$6F ,unsigned(trunc(m_alpha_src._value * 255 ) ) );
|
|
rgbb.ConstrInt($FE ,$9F ,$34 ,unsigned(trunc(m_alpha_src._value * 255 ) ) );
|
|
|
|
circle(
|
|
@rb ,@rgba ,@rgbb ,
|
|
70 * 3 ,100 + 24 * 3 ,37 * 3 ,100 + 79 * 3 ,
|
|
m_alpha_src._value );
|
|
|
|
ren_pixf.comp_op_(m_comp_op._cur_item );
|
|
|
|
if m_comp_op._cur_item = 25 then // Contrast
|
|
begin
|
|
v:=m_alpha_dst._value;
|
|
|
|
rgba.ConstrDbl(v ,v ,v );
|
|
|
|
dst_shape(
|
|
@renderer ,
|
|
@rgba ,@rgba ,
|
|
300 + 50 ,100 + 24 * 3 ,107 + 50 ,100 + 79 * 3 );
|
|
|
|
end
|
|
else
|
|
begin
|
|
rgba.ConstrInt($7F ,$C1 ,$FF ,unsigned(trunc(m_alpha_dst._value * 255 ) ) );
|
|
rgbb.ConstrInt($05 ,$00 ,$5F ,unsigned(trunc(m_alpha_dst._value * 255 ) ) );
|
|
|
|
dst_shape(
|
|
@renderer ,
|
|
@rgba ,@rgbb ,
|
|
300 + 50 ,100 + 24 * 3 ,107 + 50 ,100 + 79 * 3 );
|
|
|
|
end;
|
|
|
|
end;
|
|
|
|
{ ON_INIT }
|
|
procedure the_application.on_init;
|
|
begin
|
|
end;
|
|
|
|
{ ON_DRAW }
|
|
procedure the_application.on_draw;
|
|
var
|
|
pixf ,pixf2 ,pixf_pre : pixel_formats;
|
|
|
|
rgba : aggclr;
|
|
|
|
rb ,rb2 ,rb_pre : renderer_base;
|
|
|
|
ras : rasterizer_scanline_aa;
|
|
sl : scanline_u8;
|
|
ren : renderer_scanline_aa_solid;
|
|
|
|
y ,x : unsigned;
|
|
|
|
tm : double;
|
|
buf : array[0..63 ] of char;
|
|
t : gsv_text;
|
|
pt : conv_stroke;
|
|
|
|
begin
|
|
// Initialize structures
|
|
pixfmt_bgra32(pixf ,rbuf_window );
|
|
rb.Construct (@pixf );
|
|
|
|
rgba.ConstrInt(255 ,255 ,255 );
|
|
rb.clear (@rgba );
|
|
|
|
y:=0;
|
|
|
|
while y < rb.height do
|
|
begin
|
|
x:=((y shr 3 ) and 1) shl 3;
|
|
|
|
while x < rb.width do
|
|
begin
|
|
rgba.ConstrInt($df ,$df ,$df );
|
|
|
|
rb.copy_bar(x ,y ,x + 7 ,y + 7 ,@rgba );
|
|
|
|
inc(x ,16 );
|
|
|
|
end;
|
|
|
|
inc(y ,8 );
|
|
|
|
end;
|
|
|
|
create_img(0 ,rbuf_window._width ,rbuf_window._height ); // agg_platform_support functionality
|
|
|
|
pixfmt_bgra32(pixf2 ,rbuf_img(0 ) );
|
|
rb2.Construct(@pixf2 );
|
|
|
|
rgba.ConstrInt(0 ,0 ,0 ,0 );
|
|
rb2.clear (@rgba );
|
|
|
|
pixfmt_bgra32_pre(pixf_pre ,rbuf_window );
|
|
rb_pre.Construct (@pixf_pre );
|
|
|
|
// Render Scene
|
|
start_timer;
|
|
|
|
render_scene(rbuf_img(0 ) ,@pixf2 );
|
|
|
|
tm:=elapsed_time;
|
|
|
|
rb_pre.blend_from(@pixf2 );
|
|
|
|
// Render Text
|
|
ras.Construct;
|
|
sl.Construct;
|
|
ren.Construct(@rb );
|
|
|
|
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 ,35.0 );
|
|
t.text_ (@buf[0 ] );
|
|
|
|
ras.add_path (@pt );
|
|
rgba.ConstrDbl (0 ,0 ,0 );
|
|
ren.color_ (@rgba );
|
|
render_scanlines(@ras ,@sl ,@ren );
|
|
|
|
// Render the controls
|
|
render_ctrl(@ras ,@sl ,@ren ,@m_alpha_src );
|
|
render_ctrl(@ras ,@sl ,@ren ,@m_alpha_dst );
|
|
render_ctrl(@ras ,@sl ,@ren ,@m_comp_op );
|
|
|
|
// Free AGG resources
|
|
ras.Destruct;
|
|
sl.Destruct;
|
|
|
|
t.Destruct;
|
|
pt.Destruct;
|
|
|
|
end;
|
|
|
|
{ ON_MOUSE_MOVE }
|
|
procedure the_application.on_mouse_move;
|
|
begin
|
|
end;
|
|
|
|
{ ON_MOUSE_BUTTON_DOWN }
|
|
procedure the_application.on_mouse_button_down;
|
|
begin
|
|
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_(
|
|
'AGG is fully compatible with all SVG 1.2 extended compositing modes. '#13#13 +
|
|
'How to play with:'#13#13 +
|
|
'Try to change the alpha values of the source an destination images,'#13 +
|
|
'to see, how a particular operation composes the resulting image.' +
|
|
#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 ];
|
|
|
|
img_name ,p ,n ,x : shortstring;
|
|
|
|
BEGIN
|
|
app.Construct(pix_format_bgra32 ,flip_y );
|
|
app.caption_ ('AGG Example. Compositing Modes (F1-Help)' );
|
|
|
|
img_name:='compositing';
|
|
|
|
{$IFDEF WIN32 }
|
|
if ParamCount > 0 then
|
|
begin
|
|
spread_name(ParamStr(1 ) ,p ,n ,x );
|
|
|
|
img_name:=fold_name(p ,n ,'' );
|
|
|
|
end;
|
|
|
|
{$ENDIF }
|
|
|
|
if not app.load_img(1 ,img_name ) then
|
|
begin
|
|
img_name:=img_name + #0;
|
|
ext :=app._img_ext + #0;
|
|
|
|
if img_name = 'compositing'#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 ,400 ,window_resize ) then
|
|
app.run;
|
|
|
|
app.Destruct;
|
|
|
|
END. |