Christian Costa : d3dx9: Return D3DFMT_A8R8G8B8 in D3DXGetImageInfoFromFileInMemory for 32 bpp BMP with alpha.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 8f6c832b3178279321140d4a79f2b66bdd069c0f
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=8f6c832b3178279321140d4a7...

Author: Christian Costa 
Date:   Sat Jan 30 13:50:48 2021 -0600

d3dx9: Return D3DFMT_A8R8G8B8 in D3DXGetImageInfoFromFileInMemory for 32 bpp BMP with alpha.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=48563
Signed-off-by: Zebediah Figura 
Signed-off-by: Matteo Bruni 
Signed-off-by: Alexandre Julliard

---

dlls/d3dx9_36/surface.c       | 38 ++++++++++++++++++++++++++++++++++++++
 dlls/d3dx9_36/tests/surface.c |  2 +-
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/dlls/d3dx9_36/surface.c b/dlls/d3dx9_36/surface.c
index 045d7267c96..362113386ea 100644
--- a/dlls/d3dx9_36/surface.c
+++ b/dlls/d3dx9_36/surface.c
@@ -887,6 +887,41 @@ static BOOL convert_dib_to_bmp(const void **data, unsigned int *size)
     return TRUE;
 }

+/* windowscodecs always returns xRGB, but we should return ARGB if and only if
+ * at least one pixel has a non-zero alpha component. */
+static BOOL image_is_argb(IWICBitmapFrameDecode *frame, const D3DXIMAGE_INFO *info)
+{
+    unsigned int size, i;
+    BYTE *buffer;
+    HRESULT hr;
+
+    if (info->Format != D3DFMT_X8R8G8B8 || info->ImageFileFormat != D3DXIFF_BMP)
+        return FALSE;
+
+    size = info->Width * info->Height * 4;
+    if (!(buffer = malloc(size)))
+        return FALSE;
+
+    if (FAILED(hr = IWICBitmapFrameDecode_CopyPixels(frame, NULL, info->Width * 4, size, buffer)))
+    {
+        ERR("Failed to copy pixels, hr %#x.\n", hr);
+        free(buffer);
+        return FALSE;
+    }
+
+    for (i = 0; i < info->Width * info->Height; ++i)
+    {
+        if (buffer[i * 4 + 3])
+        {
+            free(buffer);
+            return TRUE;
+        }
+    }
+
+    free(buffer);
+    return FALSE;
+}
+
 /************************************************************
  * D3DXGetImageInfoFromFileInMemory
  *
@@ -1006,6 +1041,9 @@ HRESULT WINAPI D3DXGetImageInfoFromFileInMemory(const void *data, UINT datasize,
                 }
             }

+            if (SUCCEEDED(hr) && image_is_argb(frame, info))
+                info->Format = D3DFMT_A8R8G8B8;
+
             if (frame)
                  IWICBitmapFrameDecode_Release(frame);

diff --git a/dlls/d3dx9_36/tests/surface.c b/dlls/d3dx9_36/tests/surface.c
index 4590a758d78..1d32b68c3a6 100644
--- a/dlls/d3dx9_36/tests/surface.c
+++ b/dlls/d3dx9_36/tests/surface.c
@@ -698,7 +698,7 @@ static void test_D3DXGetImageInfo(void)
     ok(info.Format == D3DFMT_X8R8G8B8, "Got unexpected format %u.\n", info.Format);
     hr = D3DXGetImageInfoFromFileInMemory(bmp_32bpp_argb, sizeof(bmp_32bpp_argb), &info);
     ok(hr == D3D_OK, "Got unexpected hr %#x.\n", hr);
-    todo_wine ok(info.Format == D3DFMT_A8R8G8B8, "Got unexpected format %u.\n", info.Format);
+    ok(info.Format == D3DFMT_A8R8G8B8, "Got unexpected format %u.\n", info.Format);

/* Grayscale PNG */
     hr = D3DXGetImageInfoFromFileInMemory(png_grayscale, sizeof(png_grayscale), &info);