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

450 lines
8.5 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
simple_blur ;
uses
agg_basics ,
agg_platform_support ,
agg_color ,
agg_pixfmt ,
agg_pixfmt_rgb ,
agg_rendering_buffer ,
agg_renderer_base ,
agg_renderer_scanline ,
agg_renderer_outline_aa ,
agg_rasterizer_scanline_aa ,
agg_rasterizer_outline_aa ,
agg_scanline ,
agg_scanline_u ,
agg_scanline_p ,
agg_render_scanlines ,
agg_ellipse ,
agg_path_storage ,
agg_conv_stroke ,
agg_conv_transform ,
agg_bounding_rect ,
agg_span_generator ,
agg_trans_affine ,
agg_span_allocator ,
parse_lion_ ;
{$I agg_mode.inc }
const
flip_y = true;
var
g_path : path_storage;
g_colors : array[0..99 ] of aggclr;
g_path_idx : array[0..99 ] of unsigned;
g_npaths : unsigned;
g_x1 ,g_y1 ,g_x2 ,g_y2 ,
g_base_dx ,g_base_dy ,
g_angle ,g_scale ,
g_skew_x ,g_skew_y : double;
g_nclick : int;
type
span_simple_blur_rgb24 = object(span_generator )
m_source_image : rendering_buffer_ptr;
constructor Construct(alloc : span_allocator_ptr ); overload;
constructor Construct(alloc : span_allocator_ptr; src : rendering_buffer_ptr ); overload;
procedure _source_image(src : rendering_buffer_ptr );
function source_image : rendering_buffer_ptr;
function generate(x ,y : int; len : unsigned ) : aggclr_ptr; virtual;
end;
the_application = object(platform_support )
m_cx ,
m_cy : double;
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_key(x ,y : int; key ,flags : unsigned ); virtual;
end;
{ CONSTRUCT }
constructor span_simple_blur_rgb24.Construct(alloc : span_allocator_ptr );
begin
inherited Construct(alloc );
m_source_image:=NIL;
end;
{ CONSTRUCT }
constructor span_simple_blur_rgb24.Construct(alloc : span_allocator_ptr; src : rendering_buffer_ptr );
begin
inherited Construct(alloc );
m_source_image:=src;
end;
{ _SOURCE_IMAGE }
procedure span_simple_blur_rgb24._source_image;
begin
m_source_image:=src;
end;
{ SOURCE_IMAGE }
function span_simple_blur_rgb24.source_image;
begin
result:=m_source_image;
end;
{ GENERATE }
function span_simple_blur_rgb24.generate;
var
span : aggclr_ptr;
color : array[0..3 ] of int;
i : int;
ptr : int8u_ptr;
begin
span:=_allocator.span;
if (y < 1 ) or
(y >= m_source_image._height - 1 ) then
begin
repeat
span.ConstrInt(0 ,0 ,0 ,0 );
inc(integer(span ) ,sizeof(aggclr ) );
dec(len );
until len = 0;
result:=_allocator.span;
exit;
end;
repeat
color[0 ]:=0;
color[1 ]:=0;
color[2 ]:=0;
color[3 ]:=0;
if (x > 0 ) and
(x < m_source_image._width - 1 ) then
begin
i:=3;
repeat
ptr:=int8u_ptr(integer(m_source_image.row(y - i + 2 ) ) + ((x - 1 ) * 3 ) * sizeof(int8u ) );
inc(color[0 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[1 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[2 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[3 ] ,255 );
inc(color[0 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[1 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[2 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[3 ] ,255 );
inc(color[0 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[1 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[2 ] ,ptr^ ); inc(integer(ptr ) ,sizeof(int8u ) );
inc(color[3 ] ,255 );
dec(i );
until i = 0;
color[0 ]:=color[0 ] div 9;
color[1 ]:=color[1 ] div 9;
color[2 ]:=color[2 ] div 9;
color[3 ]:=color[3 ] div 9;
end;
span.ConstrInt(color[2 ] ,color[1 ] ,color[0 ] ,color[3 ] );
inc(integer(span ) ,sizeof(aggclr ) );
inc(x );
dec(len );
until len = 0;
result:=_allocator.span;
end;
{ _PARSE_LION_ }
procedure _parse_lion_;
begin
g_npaths:=parse_lion(@g_path ,@g_colors ,@g_path_idx );
bounding_rect(@g_path ,@g_path_idx ,0 ,g_npaths ,@g_x1 ,@g_y1 ,@g_x2 ,@g_y2 );
g_base_dx:=(g_x2 - g_x1 ) / 2.0;
g_base_dy:=(g_y2 - g_y1 ) / 2.0;
end;
{ CONSTRUCT }
constructor the_application.Construct;
begin
inherited Construct(format_ ,flip_y_ );
m_cx:=100;
m_cy:=102;
_parse_lion_;
end;
{ DESTRUCT }
destructor the_application.Destruct;
begin
inherited Destruct;
end;
{ ON_DRAW }
procedure the_application.on_draw;
var
pixf : pixel_formats;
rb : renderer_base;
rs : renderer_scanline_aa_solid;
rgba : aggclr;
trans : conv_transform;
mtx ,
inv : trans_affine;
tat : trans_affine_translation;
tas : trans_affine_scaling;
tar : trans_affine_rotation;
taw : trans_affine_skewing;
ras2 : rasterizer_scanline_aa;
sl : scanline_p8;
sl2 : scanline_u8;
profile : line_profile_aa;
rp : renderer_outline_aa;
ras : rasterizer_outline_aa;
ell : ellipse;
ell_stroke1 ,
ell_stroke2 : conv_stroke;
sa : span_allocator;
sg : span_simple_blur_rgb24;
rblur : renderer_scanline_aa;
begin
// Initialize structures
pixfmt_bgr24(pixf ,rbuf_window );
rb.Construct(@pixf );
rs.Construct(@rb );
rgba.ConstrDbl(1 ,1 ,1 );
rb.clear (@rgba );
mtx.Construct;
trans.Construct(@g_path ,@mtx );
tat.Construct(-g_base_dx ,-g_base_dy );
mtx.multiply (@tat );
tas.Construct(g_scale ,g_scale );
mtx.multiply (@tas );
tar.Construct(g_angle + pi );
mtx.multiply (@tar );
taw.Construct(g_skew_x / 1000.0 ,g_skew_y / 1000.0 );
mtx.multiply (@taw );
tat.Construct(_initial_width / 4 ,_initial_height / 2 );
mtx.multiply (@tat );
mtx.multiply(_trans_affine_resizing );
ras2.Construct;
sl.Construct;
sl2.Construct;
// Full lion
render_all_paths(@ras2 ,@sl ,@rs ,@trans ,@g_colors ,@g_path_idx ,g_npaths );
// Outline Lion
inv.Construct;
inv.assign(_trans_affine_resizing );
inv.invert;
mtx.multiply(@inv );
tat.Construct(_initial_width / 2 ,0 );
mtx.multiply(@tat );
mtx.multiply(_trans_affine_resizing );
profile.Construct;
profile.width_(1.0 );
rp.Construct (@rb ,@profile );
ras.Construct(@rp );
ras.round_cap_ (true );
ras.accurate_join_(true );
ras.render_all_paths(@trans ,@g_colors ,@g_path_idx ,g_npaths );
// Ellipses
ell.Construct(m_cx ,m_cy ,100.0 ,100.0 ,100 );
ell_stroke1.Construct(@ell );
ell_stroke1.width_ (6.0 );
ell_stroke2.Construct(@ell_stroke1 );
ell_stroke2.width_ (2.0 );
rgba.ConstrDbl(0,0.2,0);
rs.color_ (@rgba );
ras2.add_path (@ell_stroke2 );
render_scanlines(@ras2 ,@sl ,@rs );
// Blur
sa.Construct;
sg.Construct(@sa );
rblur.Construct (@rb ,@sg );
sg._source_image(rbuf_img(0 ) );
ras2.add_path(@ell );
copy_window_to_img(0 );
render_scanlines (@ras2 ,@sl2 ,@rblur );
// More blur if desired :-)
{ copy_window_to_img(0 );
render_scanlines (@ras2 ,@sl2 ,@rblur );
copy_window_to_img(0 );
render_scanlines (@ras2 ,@sl2 ,@rblur );
copy_window_to_img(0 );
render_scanlines (@ras2 ,@sl2 ,@rblur );{}
// Free AGG resources
ras2.Destruct;
sl.Destruct;
sl2.Destruct;
ras.Destruct;
profile.Destruct;
ell_stroke1.Destruct;
ell_stroke2.Destruct;
sa.Destruct;
end;
{ ON_MOUSE_MOVE }
procedure the_application.on_mouse_move;
begin
on_mouse_button_down(x ,y ,flags );
end;
{ ON_MOUSE_BUTTON_DOWN }
procedure the_application.on_mouse_button_down;
begin
if flags and mouse_left <> 0 then
begin
m_cx:=x;
m_cy:=y;
force_redraw;
end;
end;
{ ON_KEY }
procedure the_application.on_key;
begin
if key = key_f1 then
message_(
'The example demonstrates how to write custom span generators. This one just applies '#13 +
'the simplest "blur" filter 3x3 to a prerendered image. It calculates the average value '#13 +
'of 9 neighbor pixels.'#13#13 +
'How to play with:'#13#13 +
'Just press the left mouse button and drag.'#13 +
'Uncomment and recompile the part of the demo source code to get more blur.' +
#13#13'Note: F2 key saves current "screenshot" file in this demo''s directory. ' );
end;
VAR
app : the_application;
BEGIN
// Rendering
g_path.Construct;
g_npaths:=0;
g_x1:=0;
g_y1:=0;
g_x2:=0;
g_y2:=0;
g_base_dx:=0;
g_base_dy:=0;
g_angle:=0;
g_scale:=1.0;
g_skew_x:=0;
g_skew_y:=0;
g_nclick:=0;
// App
app.Construct(pix_format_bgr24 ,flip_y );
app.caption_ ('AGG Example. Lion with Alpha-Masking (F1-Help)' );
if app.init(512 ,400 ,window_resize ) then
app.run;
app.Destruct;
// Free
g_path.Destruct;
END.