depth buffer

Juliet/render/d3d12/render_d3d12.c

@@ -268,6 +268,37 @@ R_Handle r_window_equip(WM_Window handle)
         Vector2i resolution  = { (int32)(client_rect.x1 - client_rect.x0), (int32)(client_rect.y1 - client_rect.y0) };
         window->last_resolution = resolution;
 
+        // create depth buffer
+        D3D12_DESCRIPTOR_HEAP_DESC dsv_heap_desc = { 0 };
+        dsv_heap_desc.Type                       = D3D12_DESCRIPTOR_HEAP_TYPE_DSV;
+        dsv_heap_desc.NumDescriptors             = 1;
+        dsv_heap_desc.Flags                      = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
+        ID3D12Device4_CreateDescriptorHeap(r_d3d12_state->device, &dsv_heap_desc, &IID_ID3D12DescriptorHeap,
+                                           (void**)&window->dsv_heap);
+        ID3D12DescriptorHeap_GetCPUDescriptorHandleForHeapStart(window->dsv_heap, &window->dsv_handle);
+
+        D3D12_HEAP_PROPERTIES depth_prop = { 0 };
+        depth_prop.Type                  = D3D12_HEAP_TYPE_DEFAULT;
+        D3D12_RESOURCE_DESC depth_desc   = { 0 };
+        depth_desc.Dimension             = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
+        depth_desc.Format                = DXGI_FORMAT_D32_FLOAT;
+        depth_desc.Width                 = resolution.x;
+        depth_desc.Height                = resolution.y;
+        depth_desc.DepthOrArraySize      = 1;
+        depth_desc.MipLevels             = 1;
+        depth_desc.SampleDesc.Count      = 1;
+        depth_desc.Layout                = D3D12_TEXTURE_LAYOUT_UNKNOWN;
+        depth_desc.Flags                 = D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;
+
+        D3D12_CLEAR_VALUE depth_clear_val  = { 0 };
+        depth_clear_val.Format             = DXGI_FORMAT_D32_FLOAT;
+        depth_clear_val.DepthStencil.Depth = 1.0f;
+
+        ID3D12Device4_CreateCommittedResource(r_d3d12_state->device, &depth_prop, D3D12_HEAP_FLAG_NONE, &depth_desc,
+                                              D3D12_RESOURCE_STATE_DEPTH_WRITE, &depth_clear_val, &IID_ID3D12Resource,
+                                              (void**)&window->depth_buffer);
+        ID3D12Device4_CreateDepthStencilView(r_d3d12_state->device, window->depth_buffer, 0, window->dsv_handle);
+
         result = r_d3d12_handle_from_window(window);
     }
     return result;
@@ -282,6 +313,8 @@ void r_window_unequip(WM_Window handle, R_Handle handle_equip)
         R_D3D12_Window* window = r_d3d12_window_from_handle(handle_equip);
         if (window != 0 && window != &r_d3d12_nil_window)
         {
+            ID3D12Resource_Release(window->depth_buffer);
+            ID3D12DescriptorHeap_Release(window->dsv_heap);
             for EachIndex(i, 2)
             {
                 ID3D12Resource_Release(window->framebuffer[i]);
@@ -356,6 +389,31 @@ void r_window_begin_frame(WM_Window window, R_Handle window_equip)
                 IDXGISwapChain3_GetBuffer(r_window->swapchain, i, &IID_ID3D12Resource, (void**)&r_window->framebuffer[i]);
                 ID3D12Device4_CreateRenderTargetView(r_d3d12_state->device, r_window->framebuffer[i], 0, r_window->rtv_handles[i]);
             }
+
+            // recreate depth buffer
+            ID3D12Resource_Release(r_window->depth_buffer);
+            D3D12_HEAP_PROPERTIES depth_prop = { 0 };
+            depth_prop.Type                  = D3D12_HEAP_TYPE_DEFAULT;
+            D3D12_RESOURCE_DESC depth_desc   = { 0 };
+            depth_desc.Dimension             = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
+            depth_desc.Format                = DXGI_FORMAT_D32_FLOAT;
+            depth_desc.Width                 = resolution.x;
+            depth_desc.Height                = resolution.y;
+            depth_desc.DepthOrArraySize      = 1;
+            depth_desc.MipLevels             = 1;
+            depth_desc.SampleDesc.Count      = 1;
+            depth_desc.Layout                = D3D12_TEXTURE_LAYOUT_UNKNOWN;
+            depth_desc.Flags                 = D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;
+
+            D3D12_CLEAR_VALUE depth_clear_val  = { 0 };
+            depth_clear_val.Format             = DXGI_FORMAT_D32_FLOAT;
+            depth_clear_val.DepthStencil.Depth = 1.0f;
+
+            ID3D12Device4_CreateCommittedResource(r_d3d12_state->device, &depth_prop, D3D12_HEAP_FLAG_NONE, &depth_desc,
+                                                  D3D12_RESOURCE_STATE_DEPTH_WRITE, &depth_clear_val,
+                                                  &IID_ID3D12Resource, (void**)&r_window->depth_buffer);
+            ID3D12Resource_SetName(r_window->depth_buffer, L"Window_DepthBuffer");
+            ID3D12Device4_CreateDepthStencilView(r_d3d12_state->device, r_window->depth_buffer, 0, r_window->dsv_handle);
         }
 
         // Open the command list for that window that frame
@@ -380,6 +438,10 @@ void r_window_begin_frame(WM_Window window, R_Handle window_equip)
         float32 background[4] = { 0.1f, 0.2f, 0.8f, 1.0f };
         ID3D12GraphicsCommandList_ClearRenderTargetView(cmd_list, r_window->rtv_handles[r_window->framebuffer_idx],
                                                         background, 0, 0);
+
+        ID3D12GraphicsCommandList_ClearDepthStencilView(cmd_list, r_window->dsv_handle, D3D12_CLEAR_FLAG_DEPTH, 1.0f, 0, 0, 0);
+        ID3D12GraphicsCommandList_OMSetRenderTargets(cmd_list, 1, &r_window->rtv_handles[r_window->framebuffer_idx],
+                                                     FALSE, &r_window->dsv_handle);
     }
 }
 

Juliet/render/d3d12/render_d3d12.h

@@ -26,6 +26,11 @@ struct R_D3D12_Window
     ID3D12DescriptorHeap*       rtv_heap;
     uint8                       framebuffer_idx;
 
+    // depth buffer
+    ID3D12Resource*             depth_buffer;
+    ID3D12DescriptorHeap*       dsv_heap;
+    D3D12_CPU_DESCRIPTOR_HANDLE dsv_handle;
+
     // last state
     Vector2i last_resolution;
 };