forgotten file

--HG-- extra : convert_revision : svn%3Aeebe1cee-a9af-4fe4-bd26-ad572b19c5ab/trunk%4026
2005-05-23 13:28:50 +00:00 · 2005-05-23 13:28:50 +00:00 · 809a804c97
commit 809a804c97
parent ef432da534
1 changed files with 134 additions and 0 deletions
--- a/src/alock_utils.c
+++ b/src/alock_utils.c
@ -0,0 +1,134 @@
+/* ---------------------------------------------------------------- *\
+
+  file    : alock_utils.c
+  author  : m. gumz <akira at fluxbox dot org>
+  copyr   : copyright (c) 2005 by m. gumz
+
+  license : see LICENSE
+  
+  start   : Mo 23 Mai 2005 13:55:24 CEST
+
+\* ---------------------------------------------------------------- */
+/* ---------------------------------------------------------------- *\
+
+  about : collection of shared code among the modules
+
+\* ---------------------------------------------------------------- */
+
+/* ---------------------------------------------------------------- *\
+  includes
+\* ---------------------------------------------------------------- */
+#include <X11/Xlib.h>
+#ifdef HAVE_XRENDER
+#    include <X11/extensions/Xrender.h>
+#endif /* HAVE_XRENDER */
+#include <stdio.h>
+#include "alock.h"
+
+/* ---------------------------------------------------------------- *\
+\* ---------------------------------------------------------------- */
+int alock_alloc_color(const struct aXInfo* xinfo, const char* color_name,
+        const char* fallback_name, XColor* result) {
+
+    static XColor tmp;
+
+    if (!xinfo || !color_name || !fallback_name || !result)
+        return 0;
+
+    if((XAllocNamedColor(xinfo->display, xinfo->colormap, color_name, &tmp, result)) == 0)
+        if ((XAllocNamedColor(xinfo->display, xinfo->colormap, fallback_name, &tmp, result)) == 0)
+            return 0;
+    return 1;
+}
+
+/*------------------------------------------------------------------*\
+\*------------------------------------------------------------------*/
+int alock_check_xrender(const struct aXInfo* xinfo) {
+#ifdef HAVE_XRENDER
+    int major_opcode, first_event, first_error;
+    if (XQueryExtension(xinfo->display, "RENDER",
+                        &major_opcode,
+                        &first_event, &first_error) == False) {
+        printf("alock: error, no xrender-support found\n");
+        return 0;
+    }
+    return 1;
+#else
+    printf("alock: error, i wasnt compiled to support xrender.\n");
+    return 0;
+#endif /* HAVE_XRENDER */
+}
+
+int alock_shade_pixmap(const struct aXInfo* xinfo,
+        const Pixmap src_pm,
+        Pixmap dst_pm, 
+        unsigned char shade, 
+        int src_x, int src_y,
+        int dst_x, int dst_y,
+        unsigned int width,
+        unsigned int height) {
+#ifdef HAVE_XRENDER
+    Display* dpy = xinfo->display;
+    int scrnr = DefaultScreen(dpy);
+    Visual* vis = DefaultVisual(dpy, scrnr);
+
+    Picture alpha_pic = None;
+    XRenderPictFormat* format = None;
+    XRenderPictFormat alpha_format;
+
+    alpha_format.type = PictTypeDirect;
+    alpha_format.depth = 8;
+    alpha_format.direct.alpha = 0;
+    alpha_format.direct.alphaMask = 0xff;
+
+    format = XRenderFindStandardFormat(dpy, PictStandardA8);
+    if (!format) {
+        printf("error, couldnt find valid format for alpha.\n");
+        XFreePixmap(dpy, dst_pm);
+        XFreePixmap(dpy, src_pm);
+        return 0;
+    }
+
+    { /* fill the alpha-picture */ 
+        Pixmap alpha_pm = None;
+        XRenderColor alpha_color;
+        XRenderPictureAttributes alpha_attr;
+
+        alpha_color.alpha = 0xffff * (shade)/100;
+
+        alpha_attr.repeat = True;
+
+        alpha_pm = XCreatePixmap(dpy, src_pm, 1, 1, 8);
+        alpha_pic = XRenderCreatePicture(dpy, alpha_pm, format, CPRepeat, &alpha_attr);
+        XRenderFillRectangle(dpy, PictOpSrc, alpha_pic, &alpha_color, 0, 0, 1, 1);
+        XFreePixmap(dpy, alpha_pm);
+    }
+            
+    { /* blend all together */
+        Picture src_pic;
+        Picture dst_pic;
+        
+        format = XRenderFindVisualFormat(dpy, vis);
+
+        src_pic = XRenderCreatePicture(dpy, src_pm, format, 0, 0);
+        dst_pic = XRenderCreatePicture(dpy, dst_pm, format, 0, 0);
+
+        XRenderComposite(dpy, PictOpOver, 
+                         src_pic, alpha_pic, dst_pic, 
+                         src_x, src_y, 0, 0, dst_x, dst_y, width, height);
+        XRenderFreePicture(dpy, src_pic);
+        XRenderFreePicture(dpy, dst_pic);
+    }
+    return 1;
+#else
+    return 0;
+#endif /* HAVE_XRENDER */
+}
+
+
+
+
+/* ---------------------------------------------------------------- *\
+\* ---------------------------------------------------------------- */
+
+