[PATCH 3/5] d2d1: Allow creating zero-sized bitmaps.

[Nikolay Sivov]

Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
---
 dlls/d2d1/bitmap.c     | 12 ++++++++++--
 dlls/d2d1/tests/d2d1.c | 24 +++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/dlls/d2d1/bitmap.c b/dlls/d2d1/bitmap.c
index 85514627ca..fde348fa1c 100644
--- a/dlls/d2d1/bitmap.c
+++ b/dlls/d2d1/bitmap.c
@@ -315,8 +315,16 @@ HRESULT d2d_bitmap_create(struct d2d_device_context *context, D2D1_SIZE_U size,
         return D2DERR_UNSUPPORTED_PIXEL_FORMAT;
     }
 
-    texture_desc.Width = size.width;
-    texture_desc.Height = size.height;
+    if (size.width == 0 || size.height == 0)
+    {
+        texture_desc.Width = 1;
+        texture_desc.Height = 1;
+    }
+    else
+    {
+        texture_desc.Width = size.width;
+        texture_desc.Height = size.height;
+    }
     texture_desc.MipLevels = 1;
     texture_desc.ArraySize = 1;
     texture_desc.Format = desc->pixelFormat.format;
diff --git a/dlls/d2d1/tests/d2d1.c b/dlls/d2d1/tests/d2d1.c
index dcd8c30688..80660b00f9 100644
--- a/dlls/d2d1/tests/d2d1.c
+++ b/dlls/d2d1/tests/d2d1.c
@@ -827,7 +827,10 @@ static void check_bitmap_surface_(unsigned int line, ID2D1Bitmap *bitmap, BOOL h
         ok_(__FILE__, line)(desc.MiscFlags == 0, "Unexpected misc flags %#x.\n", desc.MiscFlags);
 
         pixel_size = ID2D1Bitmap_GetPixelSize(bitmap);
-        ok_(__FILE__, line)(desc.Width == pixel_size.width && desc.Height == pixel_size.height,
+        if (pixel_size.width == 0 || pixel_size.height == 0)
+            ok_(__FILE__, line)(desc.Width == 1 && desc.Height == 1, "Expected dummy 1x1 texture.\n");
+        else
+            ok_(__FILE__, line)(desc.Width == pixel_size.width && desc.Height == pixel_size.height,
                 "Mismatching texture size.\n");
 
         ID3D10Texture2D_Release(texture);
@@ -6890,6 +6893,25 @@ static void check_rt_bitmap_surface_(unsigned int line, ID2D1RenderTarget *rt, B
 
     ID2D1Bitmap_Release(bitmap);
 
+    /* Zero sized bitmaps. */
+    set_size_u(&size, 0, 0);
+    hr = ID2D1RenderTarget_CreateBitmap(rt, size, NULL, 0, &bitmap_desc, &bitmap);
+    ok_(__FILE__, line)(SUCCEEDED(hr), "Failed to create bitmap, hr %#x.\n", hr);
+    check_bitmap_surface_(line, bitmap, has_surface, options);
+    ID2D1Bitmap_Release(bitmap);
+
+    set_size_u(&size, 2, 0);
+    hr = ID2D1RenderTarget_CreateBitmap(rt, size, NULL, 0, &bitmap_desc, &bitmap);
+    ok_(__FILE__, line)(SUCCEEDED(hr), "Failed to create bitmap, hr %#x.\n", hr);
+    check_bitmap_surface_(line, bitmap, has_surface, options);
+    ID2D1Bitmap_Release(bitmap);
+
+    set_size_u(&size, 0, 2);
+    hr = ID2D1RenderTarget_CreateBitmap(rt, size, NULL, 0, &bitmap_desc, &bitmap);
+    ok_(__FILE__, line)(SUCCEEDED(hr), "Failed to create bitmap, hr %#x.\n", hr);
+    check_bitmap_surface_(line, bitmap, has_surface, options);
+    ID2D1Bitmap_Release(bitmap);
+
     /* WIC bitmap. */
     CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
 
-- 
2.19.0