/usr/lib/pike8.0/modules/Tools.pmod/PV.pike is in pike8.0-gtk 8.0.164-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | #pike __REAL_VERSION__
//! Display a image on the screen. Requires GTK.
constant dont_dump_program = 1;
#if constant(GTK2.Window)
// Toplevel compat for GTK2
constant GTK = GTK2;
class GDK { constant Pixmap = GTK2.GdkPixmap; }
#define USE_GTK2
#endif
inherit GTK.Window;
#ifdef USE_GTK2
// Compat for old Window functions
void set_background(GTK2.GdkPixmap p) { get_window()->set_background(p); }
GTK2.GdkWindow get_gdkwindow() { return get_window(); }
void set_policy( int a, int b, int c ) { set_resizable(a||b); }
void set_usize(int w, int h) { set_size_request(w, h); }
void set_app_paintable(int flag) { (flag? set_flags:unset_flags)(GTK2.APP_PAINTABLE); }
#endif
typedef Standards.URI|string|Image.Image|Image.Layer|array(Image.Layer) PVImage;
//! The image types accepted. If the image is a string, it is assumed
//! to be a filename of a image that can be loaded with Image.load.
//! This includes URLs.
//! The alpha combination modes.
//!
//! Use @[set_alpha_mode()] to change the mode.
enum AlphaMode {
Squares, //! Checkerboard pattern (default).
Solid, //! Solid color.
None, //! Ignore alpha.
AlphaOnly, //! Only show the alpha channel (if any).
};
#define STEP 30
protected {
GDK.Pixmap pixmap;
PVImage old_image;
AlphaMode alpha_mode;
Image.Color.Color alpha_color1 = Image.Color.grey,
alpha_color2 = Image.Color.darkgrey;
Image.Image get_alpha_squares()
{
Image.Image alpha_sq = Image.Image( STEP*2, STEP*2, alpha_color1 );
alpha_sq->setcolor( @alpha_color2->rgb() );
alpha_sq->box( 0, 0, STEP-1, STEP-1 );
alpha_sq->box( STEP, STEP, STEP+STEP-1, STEP+STEP-1 );
return alpha_sq;
}
Image.Image do_tile_paste( Image.Image bi, Image.Image i, Image.Image a )
{
Image.Image q = i->copy();
for( int y = 0; y<i->ysize(); y+=bi->xsize() )
for( int x = 0; x<i->xsize(); x+=bi->xsize() )
q->paste( bi, x, y );
return q->paste_mask( i, a );
}
Image.Image combine_alpha( Image.Image i, Image.Image a )
{
if(!a)
return alpha_mode == AlphaOnly ? i->copy()->clear(255,255,255) : i;
switch( alpha_mode )
{
case Squares: return do_tile_paste( get_alpha_squares(), i, a );
case Solid: return i->clear( alpha_color1)->paste_mask( i, a );
case None: return i;
case AlphaOnly: return a;
}
}
string _sprintf(int t)
{
return t=='O' && sprintf( "%O(%O)", this_program, old_image );
}
void create( PVImage i )
{
catch(GTK.setup_gtk());
::create( GTK.WindowToplevel );
set_policy( 0,0,1 );
show_now();
if( i )
set_image( i );
}
float scale_factor = 1.0;
int oxs, oys;
}
void set_alpha_mode( AlphaMode m )
//! Set the alpha combining mode. @[m] is one of @[Squares], @[Solid],
//! @[None] and @[AlphaOnly].
{
alpha_mode = m;
set_image( old_image );
}
void set_alpha_colors( Image.Color.Color c1, Image.Color.Color|void c2 )
//! Set the colors used for the alpha combination. @[c2] is only used
//! for the @[Squares] alpha mode.
//!
//! @seealso
//! @[set_alpha_mode()]
{
if( c1 ) alpha_color1 = c1;
if( c2 ) alpha_color2 = c2;
set_image( old_image );
}
Image.Image get_as_image( PVImage i )
//! Return the current image as a Image object, with the alpha
//! combining done.
{
if( arrayp( i ) )
i = Image.lay( i );
if( i->alpha )
i = combine_alpha( i->image(), i->alpha() );
return i;
}
void set_image( PVImage i )
//! Change the image.
{
if( !i ) return;
int is_uri;
if( stringp( i ) ||
(is_uri = (objectp(i) && object_program( i ) >= Standards.URI) ) )
{
if( is_uri )
i = Image.decode_layers( Protocols.HTTP.get_url_data( i ) );
else
i = Image.load_layers( i );
}
old_image = i;
i = get_as_image( i );
if( scale_factor != 1.0 )
i = i->scale( scale_factor );
int xs = i->xsize(), ys = i->ysize();
if( (xs != oxs) || (ys != oys) )
{
set_app_paintable( 1 );
set_background( pixmap = GDK.Pixmap( i ) );
set_usize( xs, ys );
oxs = xs;
oys = ys;
}
else
pixmap->set( i );
GTK.flush();
while( GTK.main_iteration_do( 0 ) );
get_gdkwindow()->clear();
GTK.flush();
while( GTK.main_iteration_do( 0 ) );
}
void scale( float factor )
//! Scale the image before display with the specified factor.
{
scale_factor = factor;
set_image( old_image );
}
void save( string filename, string|void format )
//! Write the image to a file. If no format is specified, PNG is used.
//! The alpha combination is done on the image before it's saved.
{
Image.Image i = get_as_image( old_image );
if( scale_factor != 1.0 )
i = i->scale( scale_factor );
Stdio.write_file( filename,
Image[upper_case(format)||"PNG"]["encode"]( i ) );
}
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