From f1596273a3e991448ca7e04415a74f916b2c9810 Mon Sep 17 00:00:00 2001
From: Simon Howard
Date: Mon, 20 Jul 2009 00:37:41 +0000
Subject: Save and display the loading disk icon as a fixed 16x16 square, from
 an image drawn at the bottom right corner of the screen. This seems to be the
 same as how Vanilla behaves, and fixes chook3.wad, that uses an STDISK
 replacement with an offset that pushes the image to the left.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 1629
---
 src/i_video.c | 65 ++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 37 insertions(+), 28 deletions(-)

diff --git a/src/i_video.c b/src/i_video.c
index 3412051b..582a7fa7 100644
--- a/src/i_video.c
+++ b/src/i_video.c
@@ -50,6 +50,9 @@
 #include "w_wad.h"
 #include "z_zone.h"
 
+#define LOADING_DISK_W 16
+#define LOADING_DISK_H 16
+
 // Non aspect ratio-corrected modes (direct multiples of 320x200)
 
 static screen_mode_t *screen_modes[] = {
@@ -145,7 +148,6 @@ boolean screenvisible;
 // restored by EndRead
 
 static byte *disk_image = NULL;
-static int disk_image_w, disk_image_h;
 static byte *saved_background;
 static boolean window_focused;
 
@@ -258,6 +260,8 @@ static void LoadDiskImage(void)
     patch_t *disk;
     char *disk_name;
     int y;
+    int xoffset = SCREENWIDTH - LOADING_DISK_W;
+    int yoffset = SCREENHEIGHT - LOADING_DISK_H;
     char buf[20];
 
     SDL_VideoDriverName(buf, 15);
@@ -278,19 +282,20 @@ static void LoadDiskImage(void)
 
     disk = W_CacheLumpName(disk_name, PU_STATIC);
 
-    V_DrawPatch(0, 0, 0, disk);
-    disk_image_w = SHORT(disk->width);
-    disk_image_h = SHORT(disk->height);
+    // Draw the disk to the screen:
+
+    V_DrawPatch(SCREENWIDTH - LOADING_DISK_W,
+                SCREENHEIGHT - LOADING_DISK_H,
+                0, disk);
 
-    disk_image = Z_Malloc(disk_image_w * disk_image_h, PU_STATIC, NULL);
-    saved_background = Z_Malloc(disk_image_w * disk_image_h, PU_STATIC, NULL);
+    disk_image = Z_Malloc(LOADING_DISK_W * LOADING_DISK_H, PU_STATIC, NULL);
+    saved_background = Z_Malloc(LOADING_DISK_W * LOADING_DISK_H, PU_STATIC, NULL);
 
-    for (y=0; y<disk_image_h; ++y) 
+    for (y=0; y<LOADING_DISK_H; ++y) 
     {
-        memcpy(disk_image + disk_image_w * y,
-               screens[0] + SCREENWIDTH * y,
-               disk_image_w);
-        memset(screens[0] + SCREENWIDTH * y, 0, disk_image_w);
+        memcpy(disk_image + LOADING_DISK_W * y,
+               screens[0] + SCREENWIDTH * (y + yoffset) + xoffset,
+               LOADING_DISK_W);
     }
 
     W_ReleaseLumpName(disk_name);
@@ -731,6 +736,9 @@ static void UpdateRect(int x1, int y1, int x2, int y2)
 
 void I_BeginRead(void)
 {
+    byte *screenloc = screens[0]
+                    + (SCREENHEIGHT - LOADING_DISK_H) * SCREENWIDTH
+                    + (SCREENWIDTH - LOADING_DISK_W);
     int y;
 
     if (!initialised || disk_image == NULL)
@@ -738,25 +746,27 @@ void I_BeginRead(void)
 
     // save background and copy the disk image in
 
-    for (y=0; y<disk_image_h; ++y)
+    for (y=0; y<LOADING_DISK_H; ++y)
     {
-        byte *screenloc = 
-               screens[0] 
-                 + (SCREENHEIGHT - 1 - disk_image_h + y) * SCREENWIDTH
-                 + (SCREENWIDTH - 1 - disk_image_w);
-
-        memcpy(saved_background + y * disk_image_w,
+        memcpy(saved_background + y * LOADING_DISK_W,
                screenloc,
-               disk_image_w);
-        memcpy(screenloc, disk_image + y * disk_image_w, disk_image_w);
+               LOADING_DISK_W);
+        memcpy(screenloc,
+               disk_image + y * LOADING_DISK_W,
+               LOADING_DISK_W);
+
+        screenloc += SCREENWIDTH;
     }
 
-    UpdateRect(SCREENWIDTH - disk_image_w, SCREENHEIGHT - disk_image_h,
+    UpdateRect(SCREENWIDTH - LOADING_DISK_W, SCREENHEIGHT - LOADING_DISK_H,
                SCREENWIDTH, SCREENHEIGHT);
 }
 
 void I_EndRead(void)
 {
+    byte *screenloc = screens[0]
+                    + (SCREENHEIGHT - LOADING_DISK_H) * SCREENWIDTH
+                    + (SCREENWIDTH - LOADING_DISK_W);
     int y;
 
     if (!initialised || disk_image == NULL)
@@ -764,17 +774,16 @@ void I_EndRead(void)
 
     // save background and copy the disk image in
 
-    for (y=0; y<disk_image_h; ++y)
+    for (y=0; y<LOADING_DISK_H; ++y)
     {
-        byte *screenloc = 
-               screens[0] 
-                 + (SCREENHEIGHT - 1 - disk_image_h + y) * SCREENWIDTH
-                 + (SCREENWIDTH - 1 - disk_image_w);
+        memcpy(screenloc,
+               saved_background + y * LOADING_DISK_W,
+               LOADING_DISK_W);
 
-        memcpy(screenloc, saved_background + y * disk_image_w, disk_image_w);
+        screenloc += SCREENWIDTH;
     }
 
-    UpdateRect(SCREENWIDTH - disk_image_w, SCREENHEIGHT - disk_image_h,
+    UpdateRect(SCREENWIDTH - LOADING_DISK_W, SCREENHEIGHT - LOADING_DISK_H,
                SCREENWIDTH, SCREENHEIGHT);
 }
 
-- 
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