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

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.