[D3D12] SRV and sampler bindings

src/xenia/gpu/d3d12/d3d12_shader.h

@@ -10,6 +10,7 @@
 #ifndef XENIA_GPU_D3D12_D3D12_SHADER_H_
 #define XENIA_GPU_D3D12_D3D12_SHADER_H_
 
+#include "xenia/gpu/hlsl_shader_translator.h"
 #include "xenia/gpu/shader.h"
 #include "xenia/ui/d3d12/d3d12_api.h"
 
@@ -23,17 +24,39 @@ class D3D12Shader : public Shader {
               const uint32_t* dword_ptr, uint32_t dword_count);
   ~D3D12Shader() override;
 
+  void SetTexturesAndSamplers(
+      const HlslShaderTranslator::TextureSRV* texture_srvs,
+      uint32_t texture_srv_count, const uint32_t* sampler_fetch_constants,
+      uint32_t sampler_count);
+
   bool Prepare();
 
   const uint8_t* GetDXBC() const;
   size_t GetDXBCSize() const;
 
-  // TODO(Triang3l): Real texture counts.
-  uint32_t GetTextureSRVCount() const { return 0; }
-  uint32_t GetSamplerCount() const { return 0; }
+  struct TextureSRV {
+    uint32_t fetch_constant;
+    TextureDimension dimension;
+  };
+  const TextureSRV* GetTextureSRVs(uint32_t& count_out) const {
+    count_out = texture_srv_count_;
+    return texture_srvs_;
+  }
+  const uint32_t* GetSamplerFetchConstants(uint32_t& count_out) const {
+    count_out = sampler_count_;
+    return sampler_fetch_constants_;
+  }
+  const uint32_t GetUsedTextureMask() const { return used_texture_mask_; }
 
  private:
   ID3DBlob* blob_ = nullptr;
+
+  // Up to 32 2D array textures, 32 3D textures and 32 cube textures.
+  TextureSRV texture_srvs_[96];
+  uint32_t texture_srv_count_ = 0;
+  uint32_t sampler_fetch_constants_[32];
+  uint32_t sampler_count_ = 0;
+  uint32_t used_texture_mask_ = 0;
 };
 
 }  // namespace d3d12