From f37153ac7d43d1ebb157c193b7ca2c61084b8923 Mon Sep 17 00:00:00 2001
From: Ken Thomases <ken@codeweavers.com>
Date: Thu, 4 Apr 2013 14:26:08 -0500
Subject: [PATCH] winemac: Initialize window surface to Mac-standard window
 background color instead of black.

---
 dlls/winemac.drv/cocoa_window.m | 42 +++++++++++++++++++++++++++++++++
 dlls/winemac.drv/macdrv_cocoa.h |  1 +
 dlls/winemac.drv/surface.c      |  5 +++-
 3 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/dlls/winemac.drv/cocoa_window.m b/dlls/winemac.drv/cocoa_window.m
index 99111953c26..6a85d7471b2 100644
--- a/dlls/winemac.drv/cocoa_window.m
+++ b/dlls/winemac.drv/cocoa_window.m
@@ -1796,3 +1796,45 @@ void macdrv_remove_view_opengl_context(macdrv_view v, macdrv_opengl_context c)
 
     [pool release];
 }
+
+/***********************************************************************
+ *              macdrv_window_background_color
+ *
+ * Returns the standard Mac window background color as a 32-bit value of
+ * the form 0x00rrggbb.
+ */
+uint32_t macdrv_window_background_color(void)
+{
+    static uint32_t result;
+    static dispatch_once_t once;
+
+    // Annoyingly, [NSColor windowBackgroundColor] refuses to convert to other
+    // color spaces (RGB or grayscale).  So, the only way to get RGB values out
+    // of it is to draw with it.
+    dispatch_once(&once, ^{
+        OnMainThread(^{
+            unsigned char rgbx[4];
+            unsigned char *planes = rgbx;
+            NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:&planes
+                                                                               pixelsWide:1
+                                                                               pixelsHigh:1
+                                                                            bitsPerSample:8
+                                                                          samplesPerPixel:3
+                                                                                 hasAlpha:NO
+                                                                                 isPlanar:NO
+                                                                           colorSpaceName:NSCalibratedRGBColorSpace
+                                                                             bitmapFormat:0
+                                                                              bytesPerRow:4
+                                                                             bitsPerPixel:32];
+            [NSGraphicsContext saveGraphicsState];
+            [NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithBitmapImageRep:bitmap]];
+            [[NSColor windowBackgroundColor] set];
+            NSRectFill(NSMakeRect(0, 0, 1, 1));
+            [NSGraphicsContext restoreGraphicsState];
+            [bitmap release];
+            result = rgbx[0] << 16 | rgbx[1] << 8 | rgbx[2];
+        });
+    });
+
+    return result;
+}
diff --git a/dlls/winemac.drv/macdrv_cocoa.h b/dlls/winemac.drv/macdrv_cocoa.h
index 46d13a9e291..c4819c31996 100644
--- a/dlls/winemac.drv/macdrv_cocoa.h
+++ b/dlls/winemac.drv/macdrv_cocoa.h
@@ -347,6 +347,7 @@ extern void macdrv_set_window_color_key(macdrv_window w, CGFloat keyRed, CGFloat
 extern void macdrv_set_view_window_and_frame(macdrv_view v, macdrv_window w, CGRect rect) DECLSPEC_HIDDEN;
 extern void macdrv_add_view_opengl_context(macdrv_view v, macdrv_opengl_context c) DECLSPEC_HIDDEN;
 extern void macdrv_remove_view_opengl_context(macdrv_view v, macdrv_opengl_context c) DECLSPEC_HIDDEN;
+extern uint32_t macdrv_window_background_color(void) DECLSPEC_HIDDEN;
 
 
 /* keyboard */
diff --git a/dlls/winemac.drv/surface.c b/dlls/winemac.drv/surface.c
index 564d004f711..a27ff246a9a 100644
--- a/dlls/winemac.drv/surface.c
+++ b/dlls/winemac.drv/surface.c
@@ -236,6 +236,7 @@ struct window_surface *create_surface(macdrv_window window, const RECT *rect,
     DWORD *colors;
     pthread_mutexattr_t attr;
     int err;
+    DWORD window_background;
 
     surface = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
                         FIELD_OFFSET(struct macdrv_window_surface, info.bmiColors[3]));
@@ -286,8 +287,10 @@ struct window_surface *create_surface(macdrv_window window, const RECT *rect,
     }
     update_blit_data(surface);
     surface->use_alpha = use_alpha;
-    surface->bits = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, surface->info.bmiHeader.biSizeImage);
+    surface->bits = HeapAlloc(GetProcessHeap(), 0, surface->info.bmiHeader.biSizeImage);
     if (!surface->bits) goto failed;
+    window_background = macdrv_window_background_color();
+    memset_pattern4(surface->bits, &window_background, surface->info.bmiHeader.biSizeImage);
 
     TRACE("created %p for %p %s bits %p-%p\n", surface, window, wine_dbgstr_rect(rect),
           surface->bits, surface->bits + surface->info.bmiHeader.biSizeImage);