- set tags in the resulting image

	- remove an unused variable

diff --git a/Changes b/Changes
index 27c9be7..49a0b30 100755 (executable)
--- a/Changes
+++ b/Changes
@@ -1,4 +1,6 @@
 0.004
+       - set tags in the resulting image
+       - remove an unused variable
        - add support for getting a subimage of the window
        - include the interface header in the implementations so we
          get errors when they don't match (doh!)

diff --git a/Screenshot.pm b/Screenshot.pm
index 28b6e24..79159cf 100644 (file)
--- a/Screenshot.pm
+++ b/Screenshot.pm
@@ -264,6 +264,44 @@ Closes a display returned by Imager::Screenshot::x11_open().
 
 =back
 
+=head1 TAGS
+
+screenshot() sets a number of tags in the images it returns, these are:
+
+=over
+
+=item *
+
+ss_left - the distance between the left side of the window and the
+left side of the captured area.  The same value as the I<left>
+parameter when that is positive.
+
+=item *
+
+ss_top - the distance between the top side of the window the top side
+of the captured area.  The same value at the I<top> parameter when
+that is positive.
+
+=item *
+
+ss_window_width - the full width of the window.
+
+=item *
+
+ss_window_height - the full height of the window.
+
+=item *
+
+ss_type - the type of capture done, either "Win32" or "X11".
+
+=back
+
+To cheaply get the window size you can capture a single pixel:
+
+  my $im = screenshot(right => 1, bottom => 1);
+  my $window_width  = $im->tags(name => 'ss_window_width');
+  my $window_height = $im->tags(name => 'ss_window_height');
+
 =head1 CAVEATS
 
 It's possible to have more than one grab driver available, for
@@ -274,8 +312,10 @@ Under Win32, if there's a screesaver running, then you grab the
 results of the screensaver.
 
 Grabbing the root window on a rootless server (eg. Cygwin/X) may not
-grab the background.  In fact, when I tested under Cygwin/X I got the
-xterm window contents even when the Windows screensaver was running.
+grab the background that you see.  In fact, when I tested under
+Cygwin/X I got the xterm window contents even when the Windows
+screensaver was running.  The root window captured appeared to be that
+generated by my window manager.
 
 =head1 LICENSE
 

diff --git a/scwin32.c b/scwin32.c
index 13c726d..3d9f8c2 100644 (file)
--- a/scwin32.c
+++ b/scwin32.c
@@ -101,6 +101,12 @@ imss_win32(unsigned hwnd_u, int include_decor, int left, int top,
     myfree(line);
   }
 
+  i_tags_setn(&result->tags, "ss_window_width", window_width);
+  i_tags_setn(&result->tags, "ss_window_height", window_height);
+  i_tags_set(&result->tags, "ss_type", "Win32", 5);
+  i_tags_setn(&result->tags, "ss_left", left);
+  i_tags_setn(&result->tags, "ss_top", top);
+
   /* clean up */
   myfree(di_bits);
   SelectObject(bmdc, old_dc_bmp);

diff --git a/scx11.c b/scx11.c
index 64df505..d58cd4f 100644 (file)
--- a/scx11.c
+++ b/scx11.c
@@ -19,7 +19,6 @@ imss_x11(unsigned long display_ul, int window_id,
         int left, int top, int right, int bottom) {
   Display *display = (Display *)display_ul;
   int own_display = 0; /* non-zero if we connect */
-  GC gc;
   XImage *image;
   XWindowAttributes attr;
   i_img *result;
@@ -46,7 +45,7 @@ imss_x11(unsigned long display_ul, int window_id,
 
   if (!window_id) {
     int screen = DefaultScreen(display);
-    window_id = RootWindow(display, 0);
+    window_id = RootWindow(display, screen);
   }
 
   if (!XGetWindowAttributes(display, window_id, &attr)) {
@@ -124,6 +123,12 @@ imss_x11(unsigned long display_ul, int window_id,
   if (own_display)
     XCloseDisplay(display);
 
+  i_tags_setn(&result->tags, "ss_window_width", attr.width);
+  i_tags_setn(&result->tags, "ss_window_height", attr.height);
+  i_tags_set(&result->tags, "ss_type", "X11", 3);
+  i_tags_setn(&result->tags, "ss_left", left);
+  i_tags_setn(&result->tags, "ss_top", top);
+
   return result;
 }
 

diff --git a/t/10win32.t b/t/10win32.t
index f1db421..5a50359 100644 (file)
--- a/t/10win32.t
+++ b/t/10win32.t
@@ -2,17 +2,35 @@
 use strict;
 use Test::More;
 
+# you might be looking at this test code and wondering why it doesn't
+# try to check the images themselves - the reason is that in many
+# cases the build and tests are being done in an automated build, and
+# it may be possible that the user is running a screensaver, which
+# will be what's returned instead of what we expect.
+#
+# this applies for the sub-image tests too, since the screen saver may
+# have changed the screen between the two grabs
+
 use Imager::Screenshot 'screenshot';
 
 Imager::Screenshot->have_win32
     or plan skip_all => "No Win32 support";
 
-plan tests => 2;
+plan tests => 13;
 
 {
   my $im = screenshot(hwnd => 0);
   
   ok($im, "got a screenshot");
+
+  # check the size matches the tags
+  is($im->tags(name => 'ss_window_width'), $im->getwidth,
+     "check ss_window_width tag");
+  is($im->tags(name => 'ss_window_height'), $im->getheight,
+     "check ss_window_height tag");
+  is($im->tags(name => 'ss_left'), 0, "check ss_left tag");
+  is($im->tags(name => 'ss_top'), 0, "check ss_top tag");
+  is($im->tags(name => 'ss_type'), 'Win32', "check ss_type tag");
 }
 
 { # as a method
@@ -21,3 +39,17 @@ plan tests => 2;
   ok($im, "call as a method");
 }
 
+{ # try our subimage options
+  my $im = screenshot(hwnd => 0, left => 70, top => 30, 
+                     right => -35, bottom => -17);
+  ok($im, "call with left, top, etc");
+
+  # make sure tags set as expected
+  is($im->tags(name => 'ss_left'), 70, "check left value");
+  is($im->tags(name => 'ss_top'), 30, "check top value");
+  is($im->tags(name => 'ss_type'), 'Win32', "check ss_type");
+  is($im->tags(name => 'ss_window_width'), 70 + $im->getwidth + 35,
+     "check image width against window size");
+  is($im->tags(name => 'ss_window_height'), 30 + $im->getheight + 17,
+     "check image height against window size");
+}

diff --git a/t/20x11.t b/t/20x11.t
index 80e9e97..0b49538 100644 (file)
--- a/t/20x11.t
+++ b/t/20x11.t
@@ -11,7 +11,7 @@ Imager::Screenshot->have_x11
 my $display = Imager::Screenshot::x11_open()
   or plan skip_all => "Cannot connect to a display: ".Imager->errstr;
 
-plan tests => 5;
+plan tests => 16;
 
 {
   # should automatically connect and grab the root window
@@ -19,6 +19,15 @@ plan tests => 5;
     or print "# ", Imager->errstr, "\n";
   
   ok($im, "got a root screenshot, no display");
+
+  # check the size matches the tags
+  is($im->tags(name => 'ss_window_width'), $im->getwidth,
+     "check ss_window_width tag");
+  is($im->tags(name => 'ss_window_height'), $im->getheight,
+     "check ss_window_height tag");
+  is($im->tags(name => 'ss_left'), 0, "check ss_left tag");
+  is($im->tags(name => 'ss_top'), 0, "check ss_top tag");
+  is($im->tags(name => 'ss_type'), 'X11', "check ss_type tag");
 }
 
 {
@@ -42,4 +51,20 @@ plan tests => 5;
          "check error");
 }
 
+
+{ # try our subimage options
+  my $im = screenshot(display => $display, id => 0, 
+                     left => 70, top => 30, right => -35, bottom => -17);
+  ok($im, "call with left, top, etc");
+
+  # make sure tags set as expected
+  is($im->tags(name => 'ss_left'), 70, "check left value");
+  is($im->tags(name => 'ss_top'), 30, "check top value");
+  is($im->tags(name => 'ss_type'), 'X11', "check ss_type");
+  is($im->tags(name => 'ss_window_width'), 70 + $im->getwidth + 35,
+     "check image width against window size");
+  is($im->tags(name => 'ss_window_height'), 30 + $im->getheight + 17,
+     "check image height against window size");
+}
+
 Imager::Screenshot::x11_close($display);