From 6e81557cc7a3d288c2b0860675b83d2c50d672e9 Mon Sep 17 00:00:00 2001
From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Sat, 16 Apr 2011 10:25:53 +0200
Subject: [PATCH] Fix size limit on 'save as diagram'

In stead of a fixed-size buffer the diagram-save code now uses an
allocated buffer with size calculated from the bitmap parameters to
retreive the bitmap data, so it should work for all sizes.
---
 winboard/winboard.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/winboard/winboard.c b/winboard/winboard.c
index 07e4bd2..50d82dd 100644
--- a/winboard/winboard.c
+++ b/winboard/winboard.c
@@ -3842,11 +3842,11 @@ HDCDrawPosition(HDC hdc, BOOLEAN repaint, Board board)
 	 boardRect.bottom - boardRect.top,
 	 tmphdc, boardRect.left, boardRect.top, SRCCOPY);
   if(saveDiagFlag) { 
-    BITMAP b; int i, j=0, m, w, wb, fac=0; char pData[1000000]; 
+    BITMAP b; int i, j=0, m, w, wb, fac=0; char *pData; 
     BITMAPINFOHEADER bih; int color[16], nrColors=0;
 
     GetObject(bufferBitmap, sizeof(b), &b);
-    if(b.bmWidthBytes*b.bmHeight <= 990000) {
+    if(pData = malloc(b.bmWidthBytes*b.bmHeight + 10000)) {
 	bih.biSize = sizeof(BITMAPINFOHEADER);
 	bih.biWidth = b.bmWidth;
 	bih.biHeight = b.bmHeight;
@@ -3910,6 +3910,7 @@ HDCDrawPosition(HDC hdc, BOOLEAN repaint, Board board)
 	// write bitmap data
 	for(i=0; i<wb*(b.bmHeight - boardRect.top + OUTER_MARGIN); i++) 
 		fputc(pData[i], diagFile);
+	free(pData);
      }
   }
 
@@ -3946,11 +3947,8 @@ SaveDiagram(f)
 {
     saveDiagFlag = 1; diagFile = f;
     HDCDrawPosition(NULL, TRUE, NULL);
-
     saveDiagFlag = 0;
 
-//    if(f != NULL) fprintf(f, "Sorry, but this feature is still in preparation\n");
-    
     fclose(f);
     return TRUE;
 }
-- 
1.7.0.4