Support w3m images - st - Personal fork of st
 (HTM) git clone git://git.drkhsh.at/st.git
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       ---
 (DIR) commit 8bd4919045c7bfe909eceefe16c01422b73717a5
 (DIR) parent 651c514b83eb9eda8eb45ebd4257282012a919d6
 (HTM) Author: drkhsh <me@drkhsh.at>
       Date:   Thu,  4 Jun 2020 17:35:08 +0300
       
       Support w3m images
       
       w3m images are a hack which renders on top of the terminal's drawable,
       which didn't work in st because when using double buffering, the front
       buffer (on which w3m draws its images) is ignored, and st draws only
       on the back buffer, which is then copied to the front buffer.
       
       There's a patch to make it work at the FAQ already, but that patch
       canceles double-buffering, which can have negative side effects on
       some cases such as flickering.
       
       This patch achieves the same goal but instead of canceling the double
       buffer it first copies the front buffer to the back buffer.
       
       This has the same issues as the FAQ patch in that the cursor line is
       deleted at the image (because st renders always full lines), but
       otherwise it's simpler and does keeps double buffering.
       
       https://st.suckless.org/patches/w3m/
       
       Diffstat:
         M x.c                                 |       2 ++
       
       1 file changed, 2 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/x.c b/x.c
       @@ -1636,6 +1636,8 @@ xsettitle(char *p)
        int
        xstartdraw(void)
        {
       +        if (IS_SET(MODE_VISIBLE))
       +                XCopyArea(xw.dpy, xw.win, xw.buf, dc.gc, 0, 0, win.w, win.h, 0, 0);
                return IS_SET(MODE_VISIBLE);
        }