gdi.exe: Implement the DIB.DRV driver using a window surface.

dlls/gdi.exe16/gdi.c

@@ -19,6 +19,7 @@
  */
 
 #include <stdarg.h>
+#include <stdlib.h>
 
 #include "windef.h"
 #include "winbase.h"
@@ -26,6 +27,7 @@
 #include "wownt32.h"
 #include "wine/wingdi16.h"
 #include "wine/list.h"
+#include "wine/gdi_driver.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
@@ -428,6 +430,129 @@ static void free_segptr_bits( HBITMAP16 bmp )
     }
 }
 
+/* window surface used to implement the DIB.DRV driver */
+
+struct dib_window_surface
+{
+    struct window_surface header;
+    RECT                  bounds;
+    void                 *bits;
+    UINT                  info_size;
+    BITMAPINFO            info;   /* variable size, must be last */
+};
+
+static struct dib_window_surface *get_dib_surface( struct window_surface *surface )
+{
+    return (struct dib_window_surface *)surface;
+}
+
+/***********************************************************************
+ *           dib_surface_lock
+ */
+static void dib_surface_lock( struct window_surface *window_surface )
+{
+    /* nothing to do */
+}
+
+/***********************************************************************
+ *           dib_surface_unlock
+ */
+static void dib_surface_unlock( struct window_surface *window_surface )
+{
+    /* nothing to do */
+}
+
+/***********************************************************************
+ *           dib_surface_get_bitmap_info
+ */
+static void *dib_surface_get_bitmap_info( struct window_surface *window_surface, BITMAPINFO *info )
+{
+    struct dib_window_surface *surface = get_dib_surface( window_surface );
+
+    memcpy( info, &surface->info, surface->info_size );
+    return surface->bits;
+}
+
+/***********************************************************************
+ *           dib_surface_get_bounds
+ */
+static RECT *dib_surface_get_bounds( struct window_surface *window_surface )
+{
+    struct dib_window_surface *surface = get_dib_surface( window_surface );
+
+    return &surface->bounds;
+}
+
+/***********************************************************************
+ *           dib_surface_set_region
+ */
+static void dib_surface_set_region( struct window_surface *window_surface, HRGN region )
+{
+    /* nothing to do */
+}
+
+/***********************************************************************
+ *           dib_surface_flush
+ */
+static void dib_surface_flush( struct window_surface *window_surface )
+{
+    /* nothing to do */
+}
+
+/***********************************************************************
+ *           dib_surface_destroy
+ */
+static void dib_surface_destroy( struct window_surface *window_surface )
+{
+    struct dib_window_surface *surface = get_dib_surface( window_surface );
+
+    TRACE( "freeing %p\n", surface );
+    HeapFree( GetProcessHeap(), 0, surface );
+}
+
+static const struct window_surface_funcs dib_surface_funcs =
+{
+    dib_surface_lock,
+    dib_surface_unlock,
+    dib_surface_get_bitmap_info,
+    dib_surface_get_bounds,
+    dib_surface_set_region,
+    dib_surface_flush,
+    dib_surface_destroy
+};
+
+/***********************************************************************
+ *           create_surface
+ */
+static struct window_surface *create_surface( const BITMAPINFO *info )
+{
+    struct dib_window_surface *surface;
+    int color = 0;
+
+    if (info->bmiHeader.biBitCount <= 8)
+        color = info->bmiHeader.biClrUsed ? info->bmiHeader.biClrUsed : (1 << info->bmiHeader.biBitCount);
+    else if (info->bmiHeader.biCompression == BI_BITFIELDS)
+        color = 3;
+
+    surface = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
+                         offsetof( struct dib_window_surface, info.bmiColors[color] ));
+    if (!surface) return NULL;
+
+    surface->header.funcs       = &dib_surface_funcs;
+    surface->header.rect.left   = 0;
+    surface->header.rect.top    = 0;
+    surface->header.rect.right  = info->bmiHeader.biWidth;
+    surface->header.rect.bottom = abs(info->bmiHeader.biHeight);
+    surface->header.ref         = 1;
+    surface->info_size          = offsetof( BITMAPINFO, bmiColors[color] );
+    surface->bits               = (char *)info + surface->info_size;
+    memcpy( &surface->info, info, surface->info_size );
+
+    TRACE( "created %p %ux%u for info %p bits %p\n",
+           surface, surface->header.rect.right, surface->header.rect.bottom, info, surface->bits );
+    return &surface->header;
+}
+
 
 /***********************************************************************
  *           SetBkColor    (GDI.1)
@@ -1172,6 +1297,22 @@ HDC16 WINAPI CreateCompatibleDC16( HDC16 hdc )
 HDC16 WINAPI CreateDC16( LPCSTR driver, LPCSTR device, LPCSTR output,
                          const DEVMODEA *initData )
 {
+    if (!lstrcmpiA( driver, "dib" ) || !lstrcmpiA( driver, "dirdib" ))
+    {
+        struct window_surface *surface;
+        HDC hdc;
+
+        if (!(surface = create_surface( (const BITMAPINFO *)initData ))) return 0;
+
+        if ((hdc = CreateDCA( "DISPLAY", NULL, NULL, NULL )))
+        {
+            __wine_set_visible_region( hdc, CreateRectRgnIndirect( &surface->rect ),
+                                       &surface->rect, &surface->rect, surface );
+            TRACE( "returning hdc %p surface %p\n", hdc, surface );
+        }
+        window_surface_release( surface );
+        return HDC_16( hdc );
+    }
     return HDC_16( CreateDCA( driver, device, output, initData ) );
 }