[PATCH v3 1/6] d2d1: Implement d2d_hwnd_render_target_IsSupported().

[Zhiyi Zhang]

From: Zhiyi Zhang

---
 dlls/d2d1/d2d1_private.h       |  1 +
 dlls/d2d1/hwnd_render_target.c | 33 ++++++++++++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/dlls/d2d1/d2d1_private.h b/dlls/d2d1/d2d1_private.h
index 5dab3fbb2a8..4ccb311a234 100644
--- a/dlls/d2d1/d2d1_private.h
+++ b/dlls/d2d1/d2d1_private.h
@@ -257,6 +257,7 @@ HRESULT d2d_dc_render_target_init(struct d2d_dc_render_target *render_target, ID
 struct d2d_hwnd_render_target
 {
     ID2D1HwndRenderTarget ID2D1HwndRenderTarget_iface;
+    D2D1_RENDER_TARGET_PROPERTIES desc;
     LONG refcount;

ID2D1RenderTarget *dxgi_target;
diff --git a/dlls/d2d1/hwnd_render_target.c b/dlls/d2d1/hwnd_render_target.c
index 4d3fe43a1b3..05010b3ce3a 100644
--- a/dlls/d2d1/hwnd_render_target.c
+++ b/dlls/d2d1/hwnd_render_target.c
@@ -652,10 +652,40 @@ static BOOL STDMETHODCALLTYPE d2d_hwnd_render_target_IsSupported(ID2D1HwndRender
         const D2D1_RENDER_TARGET_PROPERTIES *desc)
 {
     struct d2d_hwnd_render_target *render_target = impl_from_ID2D1HwndRenderTarget(iface);
+    const D2D1_RENDER_TARGET_PROPERTIES *target_desc = &render_target->desc;
+    D2D1_PIXEL_FORMAT pixel_format;

TRACE("iface %p, desc %p.\n", iface, desc);

-    return ID2D1RenderTarget_IsSupported(render_target->dxgi_target, desc);
+    if (!(target_desc->type == desc->type
+            || (target_desc->type == D2D1_RENDER_TARGET_TYPE_DEFAULT
+            && desc->type == D2D1_RENDER_TARGET_TYPE_HARDWARE)
+            || (target_desc->type == D2D1_RENDER_TARGET_TYPE_HARDWARE
+            && desc->type == D2D1_RENDER_TARGET_TYPE_DEFAULT)
+            || (target_desc->type == D2D1_RENDER_TARGET_TYPE_SOFTWARE
+            && desc->type == D2D1_RENDER_TARGET_TYPE_DEFAULT)))
+        return FALSE;
+
+    pixel_format = ID2D1RenderTarget_GetPixelFormat(render_target->dxgi_target);
+    if (!(pixel_format.format == desc->pixelFormat.format
+            || (pixel_format.format == DXGI_FORMAT_UNKNOWN
+            && desc->pixelFormat.format == DXGI_FORMAT_B8G8R8A8_UNORM)
+            || (pixel_format.format == DXGI_FORMAT_B8G8R8A8_UNORM
+            && desc->pixelFormat.format == DXGI_FORMAT_UNKNOWN)
+            || (pixel_format.format == DXGI_FORMAT_R8G8B8A8_UNORM
+            && desc->pixelFormat.format == DXGI_FORMAT_UNKNOWN)))
+        return FALSE;
+
+    if (!(pixel_format.alphaMode == desc->pixelFormat.alphaMode
+            || desc->pixelFormat.alphaMode == D2D1_ALPHA_MODE_UNKNOWN
+            || (pixel_format.alphaMode == D2D1_ALPHA_MODE_UNKNOWN
+            && desc->pixelFormat.alphaMode == D2D1_ALPHA_MODE_IGNORE)))
+        return FALSE;
+
+    if (!(target_desc->usage == desc->usage || desc->usage == D2D1_RENDER_TARGET_USAGE_NONE))
+        return FALSE;
+
+    return TRUE;
 }

static D2D1_WINDOW_STATE STDMETHODCALLTYPE d2d_hwnd_render_target_CheckWindowState(ID2D1HwndRenderTarget *iface)
@@ -830,6 +860,7 @@ HRESULT d2d_hwnd_render_target_init(struct d2d_hwnd_render_target *render_target
         return hr;
     }

+    render_target->desc = *desc;
     dxgi_rt_desc = *desc;
     if (dxgi_rt_desc.dpiX == 0.0f && dxgi_rt_desc.dpiY == 0.0f)
         ID2D1Factory1_GetDesktopDpi(factory, &dxgi_rt_desc.dpiX, &dxgi_rt_desc.dpiY);