From 57eeaf1d3a8a0fd090e2ccfc37d05131222ec37c Mon Sep 17 00:00:00 2001
From: Simon Howard
Date: Wed, 6 Feb 2008 23:55:33 +0000
Subject: Use geometric distance to find the nearest mode when autoadjusting,
 rather than number of pixels.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 1057
---
 src/i_video.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/i_video.c b/src/i_video.c
index 98eb41ac..8e595c62 100644
--- a/src/i_video.c
+++ b/src/i_video.c
@@ -948,7 +948,7 @@ static void I_AutoAdjustSettings(void)
         SDL_Rect **modes;
         SDL_Rect *best_mode;
         screen_mode_t *screen_mode;
-        int target_pixels, num_pixels, best_num_pixels;
+        int target_pixels, diff, best_diff;
         int i;
 
         modes = SDL_ListModes(NULL, SDL_FULLSCREEN);
@@ -957,7 +957,7 @@ static void I_AutoAdjustSettings(void)
         // configuration file
 
         best_mode = NULL;
-        best_num_pixels = INT_MAX;
+        best_diff = INT_MAX;
         target_pixels = screen_width * screen_height;
 
         for (i=0; modes[i] != NULL; ++i) 
@@ -988,14 +988,16 @@ static void I_AutoAdjustSettings(void)
 
             // Is this mode better than the current mode?
 
-            num_pixels = modes[i]->w * modes[i]->h;
+            diff = (screen_width - modes[i]->w) 
+                     * (screen_width - modes[i]->w)
+                 + (screen_height - modes[i]->h)
+                     * (screen_height - modes[i]->h);
 
-            if (abs(num_pixels - target_pixels) 
-              < abs(best_num_pixels - target_pixels))
+            if (diff < best_diff)
             {
             //    printf("\tA valid mode\n");
-                best_num_pixels = num_pixels;
                 best_mode = modes[i];
+                best_diff = diff;
             }
         }
 
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