Changeset e1c6d5df in mainline for uspace/lib/c/include/io/pixelmap.h

Timestamp:

2012-11-29T07:44:58Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3194d83

Parents:

ff98ce8 (diff), 82edef2 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge from lp:~petr-koupy/helenos/gui-optim.

The main improvements are:

• significantly faster rendering (making qemu/non-KVM usable) if user limits himself just to window movement and resizing (i.e. avoiding rotation, scaling and transparency)

• preview of the result of window transformation is depicted by a "ghost" frame following the mouse pointer

• changing of window focus feels more natural and intuitive (mouse click handler behaves more like in mainstream operating systems, window titles changes color to reflect whether they have focus or not)

File:

• uspace/lib/c/include/io/pixelmap.h (modified) (1 diff)

uspace/lib/c/include/io/pixelmap.h

@@ -52 +52 @@
     sysarg_t y)
 {
-        size_t offset = y * pixelmap->width + x;
-        pixel_t *pixel = pixelmap->data + offset;
-        return pixel;
+        if (x < pixelmap->width && y < pixelmap->height) {
+                size_t offset = y * pixelmap->width + x;
+                pixel_t *pixel = pixelmap->data + offset;
+                return pixel;
+        } else {
+                return NULL;
+        }
 }