[Vulkan] Basic texture descriptor set allocation/binding

src/xenia/gpu/spirv_shader.h

@@ -0,0 +1,81 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2022 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_GPU_SPIRV_SHADER_H_
+#define XENIA_GPU_SPIRV_SHADER_H_
+
+#include <atomic>
+#include <vector>
+
+#include "xenia/gpu/shader.h"
+#include "xenia/gpu/spirv_shader_translator.h"
+#include "xenia/gpu/xenos.h"
+
+namespace xe {
+namespace gpu {
+
+class SpirvShader : public Shader {
+ public:
+  class SpirvTranslation : public Translation {
+   public:
+    explicit SpirvTranslation(SpirvShader& shader, uint64_t modification)
+        : Translation(shader, modification) {}
+  };
+
+  explicit SpirvShader(xenos::ShaderType shader_type, uint64_t ucode_data_hash,
+                       const uint32_t* ucode_dwords, size_t ucode_dword_count,
+                       std::endian ucode_source_endian = std::endian::big);
+
+  // Resource bindings are gathered after the successful translation of any
+  // modification for simplicity of translation (and they don't depend on
+  // modification bits).
+
+  struct TextureBinding {
+    uint32_t fetch_constant : 5;
+    // Stacked and 3D are separate TextureBindings.
+    xenos::FetchOpDimension dimension : 2;
+    uint32_t is_signed : 1;
+  };
+  // Safe to hash and compare with memcmp for layout hashing.
+  const std::vector<TextureBinding>& GetTextureBindingsAfterTranslation()
+      const {
+    return texture_bindings_;
+  }
+  const uint32_t GetUsedTextureMaskAfterTranslation() const {
+    return used_texture_mask_;
+  }
+
+  struct SamplerBinding {
+    uint32_t fetch_constant : 5;
+    xenos::TextureFilter mag_filter : 2;
+    xenos::TextureFilter min_filter : 2;
+    xenos::TextureFilter mip_filter : 2;
+    xenos::AnisoFilter aniso_filter : 3;
+  };
+  const std::vector<SamplerBinding>& GetSamplerBindingsAfterTranslation()
+      const {
+    return sampler_bindings_;
+  }
+
+ protected:
+  Translation* CreateTranslationInstance(uint64_t modification) override;
+
+ private:
+  friend class SpirvShaderTranslator;
+
+  std::atomic_flag bindings_setup_entered_ = ATOMIC_FLAG_INIT;
+  std::vector<TextureBinding> texture_bindings_;
+  std::vector<SamplerBinding> sampler_bindings_;
+  uint32_t used_texture_mask_ = 0;
+};
+
+}  // namespace gpu
+}  // namespace xe
+
+#endif  // XENIA_GPU_SPIRV_SHADER_H_