[d3d8] Correctly track SetTexture state

Fixes doitsujin#6. Checking == nullptr is not a valid way to check which textures are captured because a null texture is what tells d3d to use the material color instead.

src/d3d8/d3d8_state_block.cpp

@@ -8,8 +8,8 @@ HRESULT dxvk::D3D8StateBlock::Capture() {
   if (m_capture.vs) m_device->GetVertexShader(&m_vertexShader);
   if (m_capture.ps) m_device->GetPixelShader(&m_pixelShader);
 
-  if (m_capture.textures)
-    for (DWORD stage = 0; stage < m_textures.size(); stage++)
+  for (DWORD stage = 0; stage < m_textures.size(); stage++)
+    if (m_capture.textures.get(stage))
       m_device->GetTexture(stage, &m_textures[stage]);
 
   if (m_capture.indices) m_device->GetIndices(&m_indices, &m_baseVertexIndex);
@@ -27,14 +27,9 @@ HRESULT dxvk::D3D8StateBlock::Apply() {
   if (m_capture.vs) m_device->SetVertexShader(m_vertexShader);
   if (m_capture.ps) m_device->SetPixelShader(m_pixelShader);
 
-  if (m_capture.textures) {
-    for (DWORD stage = 0; stage < m_textures.size(); stage++) {
-      IDirect3DBaseTexture8* pTexture = m_textures[stage];
-      if (pTexture != nullptr) {
-        m_device->SetTexture(stage, pTexture);
-      }
-    }
-  }
+  for (DWORD stage = 0; stage < m_textures.size(); stage++)
+    if (m_capture.textures.get(stage))
+      m_device->SetTexture(stage, m_textures[stage] );
 
   if (m_capture.indices) m_device->SetIndices(m_indices, m_baseVertexIndex);
 

src/d3d8/d3d8_state_block.h

@@ -13,7 +13,8 @@ namespace dxvk {
     bool vs       : 1;
     bool ps       : 1;
     bool indices  : 1;
-    bool textures : 1;
+
+    bit::bitset<d8caps::MAX_TEXTURE_STAGES> textures;
 
     D3D8StateCapture() {
       // Ensure all bits are initialized to false
@@ -70,7 +71,7 @@ namespace dxvk {
 
     inline HRESULT SetTexture(DWORD Stage, IDirect3DBaseTexture8* pTexture) {
       m_textures[Stage] = pTexture;
-      m_capture.textures = true;
+      m_capture.textures.set(Stage, true);
       return D3D_OK;
     }