[gnome-shell] gdm: use integer coordinates for login dialog actors

[Ray Strode <halfline src gnome org>]

commit 8e802fd32f7d028b4e6c5d2dcf2664e9e89eac99
Author: Clément Guérin <geecko dev free fr>
Date:   Fri Mar 27 22:19:47 2015 +0100

    gdm: use integer coordinates for login dialog actors
    
    If the login screen actors aren't placed at pixel
    boundaries then they will show up blurred with fuzzy
    text.
    
    This commit ensures all actor allocations are floored
    to integer coordinates.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=746912

 js/gdm/loginDialog.js |   22 +++++++++++-----------
 1 files changed, 11 insertions(+), 11 deletions(-)
---
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index eed43d7..38f53d4 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -506,7 +506,7 @@ const LoginDialog = new Lang.Class({
         let [minWidth, minHeight, natWidth, natHeight] = this._bannerView.get_preferred_size();
         let centerX = dialogBox.x1 + (dialogBox.x2 - dialogBox.x1) / 2;
 
-        actorBox.x1 = centerX - natWidth / 2;
+        actorBox.x1 = Math.floor(centerX - natWidth / 2);
         actorBox.y1 = dialogBox.y1 + Main.layoutManager.panelBox.height;
         actorBox.x2 = actorBox.x1 + natWidth;
         actorBox.y2 = actorBox.y1 + natHeight;
@@ -520,7 +520,7 @@ const LoginDialog = new Lang.Class({
         let [minWidth, minHeight, natWidth, natHeight] = this._logoBin.get_preferred_size();
         let centerX = dialogBox.x1 + (dialogBox.x2 - dialogBox.x1) / 2;
 
-        actorBox.x1 = centerX - natWidth / 2;
+        actorBox.x1 = Math.floor(centerX - natWidth / 2);
         actorBox.y1 = dialogBox.y2 - natHeight;
         actorBox.x2 = actorBox.x1 + natWidth;
         actorBox.y2 = actorBox.y1 + natHeight;
@@ -535,8 +535,8 @@ const LoginDialog = new Lang.Class({
         let centerX = dialogBox.x1 + (dialogBox.x2 - dialogBox.x1) / 2;
         let centerY = dialogBox.y1 + (dialogBox.y2 - dialogBox.y1) / 2;
 
-        actorBox.x1 = centerX - natWidth / 2;
-        actorBox.y1 = centerY - natHeight / 2;
+        actorBox.x1 = Math.floor(centerX - natWidth / 2);
+        actorBox.y1 = Math.floor(centerY - natHeight / 2);
         actorBox.x2 = actorBox.x1 + natWidth;
         actorBox.y2 = actorBox.y1 + natHeight;
 
@@ -591,7 +591,7 @@ const LoginDialog = new Lang.Class({
                  let leftOverTopSpace = leftOverYSpace / 2;
 
                  // Then, shift the banner into the middle of that extra space
-                 let yShift = leftOverTopSpace / 2;
+                 let yShift = Math.floor(leftOverTopSpace / 2);
 
                  bannerAllocation.y1 += yShift;
                  bannerAllocation.y2 += yShift;
@@ -617,8 +617,8 @@ const LoginDialog = new Lang.Class({
                      let centerGap = wideSpacing / 8;
 
                      // place the banner along the left edge of the center margin
-                     bannerAllocation.x2 = centerX - centerGap / 2;
-                     bannerAllocation.x1 = bannerAllocation.x2 - wideBannerWidth;
+                     bannerAllocation.x2 = Math.floor(centerX - centerGap / 2);
+                     bannerAllocation.x1 = Math.floor(bannerAllocation.x2 - wideBannerWidth);
 
                      // figure out how tall it would like to be and try to accomodate
                      // but don't let it get too close to the logo
@@ -626,11 +626,11 @@ const LoginDialog = new Lang.Class({
 
                      let maxWideHeight = dialogHeight - 3 * logoHeight;
                      wideBannerHeight = Math.min(maxWideHeight, wideBannerHeight);
-                     bannerAllocation.y1 = centerY - wideBannerHeight / 2;
+                     bannerAllocation.y1 = Math.floor(centerY - wideBannerHeight / 2);
                      bannerAllocation.y2 = bannerAllocation.y1 + wideBannerHeight;
 
                      // place the auth prompt along the right edge of the center margin
-                     authPromptAllocation.x1 = centerX + centerGap / 2;
+                     authPromptAllocation.x1 = Math.floor(centerX + centerGap / 2);
                      authPromptAllocation.x2 = authPromptAllocation.x1 + authPromptWidth;
                  } else {
                      // If we aren't going to do a wide view, then we need to limit
@@ -640,7 +640,7 @@ const LoginDialog = new Lang.Class({
                      leftOverYSpace += bannerHeight;
 
                      // Then figure out how much of that space is up top
-                     let availableTopSpace = leftOverYSpace / 2;
+                     let availableTopSpace = Math.floor(leftOverYSpace / 2);
 
                      // Then give all of that space to the banner
                      bannerAllocation.y2 = bannerAllocation.y1 + availableTopSpace;
@@ -651,7 +651,7 @@ const LoginDialog = new Lang.Class({
             let leftOverYSpace = dialogHeight - userSelectionHeight - logoHeight;
 
             if (leftOverYSpace > 0) {
-                let topExpansion = leftOverYSpace / 2;
+                let topExpansion = Math.floor(leftOverYSpace / 2);
                 let bottomExpansion = topExpansion;
 
                 userSelectionAllocation.y1 -= topExpansion;