Adding README.md

4 files changed, 55 insertions, 0 deletions

diff --git a/patch/alpha.c b/patch/alpha.c
new file mode 100644
index 0000000..7da7215
--- /dev/null
+++ b/patch/alpha.c
@@ -0,0 +1,42 @@
+
+static int useargb = 0;
+static Visual *visual;
+static int depth;
+static Colormap cmap;
+
+void
+xinitvisual()
+{
+	XVisualInfo *infos;
+	XRenderPictFormat *fmt;
+	int nitems;
+	int i;
+
+	XVisualInfo tpl = {
+		.screen = screen,
+		.depth = 32,
+		.class = TrueColor
+	};
+	long masks = VisualScreenMask | VisualDepthMask | VisualClassMask;
+
+	infos = XGetVisualInfo(dpy, masks, &tpl, &nitems);
+	visual = NULL;
+	for (i = 0; i < nitems; i ++) {
+		fmt = XRenderFindVisualFormat(dpy, infos[i].visual);
+		if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
+			visual = infos[i].visual;
+			depth = infos[i].depth;
+			cmap = XCreateColormap(dpy, root, visual, AllocNone);
+			useargb = 1;
+			break;
+		}
+	}
+
+	XFree(infos);
+
+	if (! visual) {
+		visual = DefaultVisual(dpy, screen);
+		depth = DefaultDepth(dpy, screen);
+		cmap = DefaultColormap(dpy, screen);
+	}
+}
diff --git a/patch/alpha.h b/patch/alpha.h
new file mode 100644
index 0000000..3c81522
--- /dev/null
+++ b/patch/alpha.h
@@ -0,0 +1,3 @@
+#define OPAQUE                  0xffU
+
+static void xinitvisual();
diff --git a/patch/include.c b/patch/include.c
new file mode 100644
index 0000000..de31d1e
--- /dev/null
+++ b/patch/include.c
@@ -0,0 +1,5 @@
+
+#if ALPHA_PATCH
+#include "alpha.c"
+#endif
+
diff --git a/patch/include.h b/patch/include.h
new file mode 100644
index 0000000..c5c8947
--- /dev/null
+++ b/patch/include.h
@@ -0,0 +1,5 @@
+
+#if ALPHA_PATCH
+#include "alpha.h"
+#endif
+