[PATCH v3 5/5] wined3d: Create a null vertex binding and attributes for unbound shader inputs.

[Jan Sikorski]

Signed-off-by: Jan Sikorski 
---
 dlls/wined3d/context_vk.c | 41 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/dlls/wined3d/context_vk.c b/dlls/wined3d/context_vk.c
index e6dc5ea568b..47bbaed792a 100644
--- a/dlls/wined3d/context_vk.c
+++ b/dlls/wined3d/context_vk.c
@@ -2032,6 +2032,7 @@ static bool wined3d_context_vk_update_graphics_pipeline_key(struct wined3d_conte
             || wined3d_context_is_graphics_state_dirty(&context_vk->c, STATE_STREAMSRC)
             || wined3d_context_is_graphics_state_dirty(&context_vk->c, STATE_SHADER(WINED3D_SHADER_TYPE_VERTEX)))
     {
+        struct wined3d_shader_signature *signature = &state->shader[WINED3D_SHADER_TYPE_VERTEX]->input_signature;
         wined3d_stream_info_from_declaration(&stream_info, state, d3d_info);
         divisor_count = 0;
         for (i = 0, mask = 0, attribute_count = 0, binding_count = 0; i < ARRAY_SIZE(stream_info.elements); ++i)
@@ -2071,6 +2072,46 @@ static bool wined3d_context_vk_update_graphics_pipeline_key(struct wined3d_conte
             }
         }

+        if (attribute_count < signature->element_count)
+        {
+            uint32_t null_binding;
+            for (i = 0; i < ARRAY_SIZE(state->streams); ++i)
+            {
+                if (!state->streams[i].buffer)
+                {
+                    null_binding = i;
+                    break;
+                }
+            }
+
+            if (i == ARRAY_SIZE(state->streams))
+                ERR("No streams left for a null buffer binding.");
+            else
+            {
+                VkVertexInputBindingDescription *b;
+                b = &key->bindings[binding_count++];
+                b->binding = null_binding;
+                b->stride = 0;
+                b->inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
+
+                for (i = 0; i < signature->element_count; ++i)
+                {
+                    struct wined3d_shader_signature_element *element = &signature->elements[i];
+                    uint32_t location = element->register_idx;
+                    VkVertexInputAttributeDescription *a;
+
+                    if ((stream_info.use_map & (1 << location)))
+                        continue;
+
+                    a = &key->attributes[attribute_count++];
+                    a->location = location;
+                    a->binding = null_binding;
+                    a->format = VK_FORMAT_R32G32B32A32_UINT;
+                    a->offset = 0;
+                }
+            }
+        }
+
         key->input_desc.pNext = NULL;
         key->input_desc.vertexBindingDescriptionCount = binding_count;
         key->input_desc.vertexAttributeDescriptionCount = attribute_count;