[PATCH v3 3/6] d2d1: Implement d2d_dc_render_target_IsSupported().

[Zhiyi Zhang]

From: Zhiyi Zhang

---
 dlls/d2d1/d2d1_private.h     |  1 +
 dlls/d2d1/dc_render_target.c | 36 +++++++++++++++++++++++++++++++++++-
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/dlls/d2d1/d2d1_private.h b/dlls/d2d1/d2d1_private.h
index 4ccb311a234..0206f474dbe 100644
--- a/dlls/d2d1/d2d1_private.h
+++ b/dlls/d2d1/d2d1_private.h
@@ -239,6 +239,7 @@ HRESULT d2d_wic_render_target_init(struct d2d_wic_render_target *render_target,
 struct d2d_dc_render_target
 {
     ID2D1DCRenderTarget ID2D1DCRenderTarget_iface;
+    D2D1_RENDER_TARGET_PROPERTIES desc;
     LONG refcount;

IDXGISurface1 *dxgi_surface;
diff --git a/dlls/d2d1/dc_render_target.c b/dlls/d2d1/dc_render_target.c
index 30eafe361d1..f9697332e25 100644
--- a/dlls/d2d1/dc_render_target.c
+++ b/dlls/d2d1/dc_render_target.c
@@ -673,10 +673,43 @@ static BOOL STDMETHODCALLTYPE d2d_dc_render_target_IsSupported(ID2D1DCRenderTarg
         const D2D1_RENDER_TARGET_PROPERTIES *desc)
 {
     struct d2d_dc_render_target *render_target = impl_from_ID2D1DCRenderTarget(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 == D2D1_ALPHA_MODE_PREMULTIPLIED
+            && (desc->pixelFormat.alphaMode == D2D1_ALPHA_MODE_UNKNOWN
+            || desc->pixelFormat.alphaMode == D2D1_ALPHA_MODE_PREMULTIPLIED))
+            || (pixel_format.alphaMode == D2D1_ALPHA_MODE_IGNORE
+            && (desc->pixelFormat.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
+            || desc->usage == D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE))
+        return FALSE;
+
+    return TRUE;
 }

static HRESULT STDMETHODCALLTYPE d2d_dc_render_target_BindDC(ID2D1DCRenderTarget *iface,
@@ -808,6 +841,7 @@ HRESULT d2d_dc_render_target_init(struct d2d_dc_render_target *render_target, ID
     HRESULT hr;

render_target->ID2D1DCRenderTarget_iface.lpVtbl = &d2d_dc_render_target_vtbl;
+    render_target->desc = *desc;

/* Set with BindDC(). */
     SetRectEmpty(&render_target->dst_rect);