shithub: choc

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Generate transparency mask for the application icon from black parts of
the image.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 1128

--- a/src/Makefile.am

+++ b/src/Makefile.am

@@ -178,7 +178,7 @@

 if HAVE_PYTHON

-icon.c : ../data/doom.png

+icon.c : ../data/doom.ico

 	../data/convert-icon $^ $@

 endif

--- a/src/i_video.c

+++ b/src/i_video.c

@@ -849,7 +849,24 @@

 void I_SetWindowIcon(void)

 {

     SDL_Surface *surface;

+    Uint8 *mask;

+    int i;

+    // Generate the mask

+  

+    mask = malloc(icon_w * icon_h / 8);

+    memset(mask, 0, icon_w * icon_h / 8);

+

+    for (i=0; i<icon_w * icon_h; ++i) 

+    {

+        if (icon_data[i * 3] != 0x00

+         || icon_data[i * 3 + 1] != 0x00

+         || icon_data[i * 3 + 2] != 0x00)

+        {

+            mask[i / 8] |= 1 << (7 - i % 8);

+        }

+    }

+

     surface = SDL_CreateRGBSurfaceFrom(icon_data,

                                        icon_w,

                                        icon_h,

@@ -860,8 +877,9 @@

                                        0xff << 16,

                                        0);

-    SDL_WM_SetIcon(surface, NULL);

+    SDL_WM_SetIcon(surface, mask);

     SDL_FreeSurface(surface);

+    free(mask);

 }

 // Pick the modes list to use: