[PATCH 5/7] wined3d: Introduce wined3d_texture_get_sub_resource_desc().

[Henri Verbeet]

Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
---
 dlls/wined3d/texture.c    | 31 +++++++++++++++++++++++++++++++
 dlls/wined3d/wined3d.spec |  1 +
 include/wine/wined3d.h    | 15 +++++++++++++++
 3 files changed, 47 insertions(+)

diff --git a/dlls/wined3d/texture.c b/dlls/wined3d/texture.c
index 76cdc72..ea19a2d 100644
--- a/dlls/wined3d/texture.c
+++ b/dlls/wined3d/texture.c
@@ -1553,6 +1553,37 @@ void CDECL wined3d_texture_set_sub_resource_parent(struct wined3d_texture *textu
     texture->sub_resources[sub_resource_idx].resource->parent = parent;
 }
 
+HRESULT CDECL wined3d_texture_get_sub_resource_desc(const struct wined3d_texture *texture,
+        unsigned int sub_resource_idx, struct wined3d_sub_resource_desc *desc)
+{
+    unsigned int sub_count = texture->level_count * texture->layer_count;
+    const struct wined3d_resource *resource;
+    unsigned int level_idx;
+
+    TRACE("texture %p, sub_resource_idx %u, desc %p.\n", texture, sub_resource_idx, desc);
+
+    if (sub_resource_idx >= sub_count)
+    {
+        WARN("sub_resource_idx %u >= sub_count %u.\n", sub_resource_idx, sub_count);
+        return WINED3DERR_INVALIDCALL;
+    }
+
+    resource = &texture->resource;
+    desc->format = resource->format->id;
+    desc->multisample_type = resource->multisample_type;
+    desc->multisample_quality = resource->multisample_quality;
+    desc->usage = resource->usage;
+    desc->pool = resource->pool;
+
+    level_idx = sub_resource_idx % texture->level_count;
+    desc->width = max(1, resource->width >> level_idx);
+    desc->height = max(1, resource->height >> level_idx);
+    desc->depth = max(1, resource->depth >> level_idx);
+    desc->size = texture->sub_resources[sub_resource_idx].resource->size;
+
+    return WINED3D_OK;
+}
+
 HRESULT CDECL wined3d_texture_create(struct wined3d_device *device, const struct wined3d_resource_desc *desc,
         UINT level_count, DWORD flags, const struct wined3d_sub_resource_data *data, void *parent,
         const struct wined3d_parent_ops *parent_ops, struct wined3d_texture **texture)
diff --git a/dlls/wined3d/wined3d.spec b/dlls/wined3d/wined3d.spec
index 0d6ce42..5e2e426 100644
--- a/dlls/wined3d/wined3d.spec
+++ b/dlls/wined3d/wined3d.spec
@@ -251,6 +251,7 @@
 @ cdecl wined3d_texture_get_pitch(ptr long ptr ptr)
 @ cdecl wined3d_texture_get_resource(ptr)
 @ cdecl wined3d_texture_get_sub_resource(ptr long)
+@ cdecl wined3d_texture_get_sub_resource_desc(ptr long ptr)
 @ cdecl wined3d_texture_get_sub_resource_parent(ptr long)
 @ cdecl wined3d_texture_incref(ptr)
 @ cdecl wined3d_texture_preload(ptr)
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index b892102..1af0d52 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -1635,6 +1635,19 @@ struct wined3d_resource_desc
     UINT size;
 };
 
+struct wined3d_sub_resource_desc
+{
+    enum wined3d_format_id format;
+    enum wined3d_multisample_type multisample_type;
+    UINT multisample_quality;
+    DWORD usage;
+    enum wined3d_pool pool;
+    UINT width;
+    UINT height;
+    UINT depth;
+    UINT size;
+};
+
 struct wined3d_clip_status
 {
    DWORD clip_union;
@@ -2447,6 +2460,8 @@ void __cdecl wined3d_texture_get_pitch(const struct wined3d_texture *texture,
 struct wined3d_resource * __cdecl wined3d_texture_get_resource(struct wined3d_texture *texture);
 struct wined3d_resource * __cdecl wined3d_texture_get_sub_resource(const struct wined3d_texture *texture,
         UINT sub_resource_idx);
+HRESULT __cdecl wined3d_texture_get_sub_resource_desc(const struct wined3d_texture *texture,
+        unsigned int sub_resource_idx, struct wined3d_sub_resource_desc *desc);
 void * __cdecl wined3d_texture_get_sub_resource_parent(struct wined3d_texture *texture, unsigned int sub_resource_idx);
 ULONG __cdecl wined3d_texture_incref(struct wined3d_texture *texture);
 void __cdecl wined3d_texture_preload(struct wined3d_texture *texture);
-- 
2.1.4