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Documentation updates (STR #365)

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The value(const Fl_Menu_Item*) method was not implemented for
Fl_Choice (STR #366)


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@3402 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
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Michael R Sweet
2004-04-29 02:47:09 +00:00
parent 13fbd26b99
commit 03a4621432
4 changed files with 34 additions and 4 deletions
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documentation/drawing.html
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@@ -746,6 +746,25 @@ function finds and returns the width and height. The return
value is non-zero if the dimensions were parsed ok and zero if
there was any problem.
<H3>Direct Image Reading</H3>
<p>FLTK provides a single function for reading from the current
window or off-screen buffer into a RGB(A) image buffer.</p>
<H4><A NAME="fl_read_image">uchar *fl_read_image(uchar *p, int
X, int Y, int W, int H, int alpha = 0);</A></H4>
<p>Read a RGB(A) image from the current window or off-screen
buffer. The <tt>p</tt> argument points to a buffer that can hold
the image and must be at least <tt>W*H*3</tt> bytes when reading
RGB images and <tt>W*H*4</tt> bytes when reading RGBA images. If
<tt>NULL</tt>, <tt>fl_read_image()</tt> will create an array of
the proper size which can be freed using <tt>delete[]</tt>.</p>
<p>The <tt>alpha</tt> parameter controls whether an alpha
channel is created and the value that is placed in the alpha
channel. If 0, no alpha channel is generated.</p>
<H3><A name="Fl_Image">Image Classes</A></H3>
<P>FLTK provides a base image class called <A