[dxvk] Compute SHA-1 hash of generated shaders

src/dxvk/dxvk_include.h

@@ -12,6 +12,8 @@
 #include "../util/rc/util_rc.h"
 #include "../util/rc/util_rc_ptr.h"
 
+#include "../util/sha1/sha1_util.h"
+
 #include "../util/sync/sync_spinlock.h"
 
 #include "./vulkan/dxvk_vulkan_extensions.h"

src/dxvk/dxvk_shader.cpp

@@ -47,6 +47,12 @@ namespace dxvk {
     const DxvkInterfaceSlots&     iface,
     const SpirvCodeBuffer&        code)
   : m_stage(stage), m_code(code), m_interface(iface) {
+    // Compute shader hash once
+    m_hash = Sha1Hash::compute(
+      reinterpret_cast<const uint8_t*>(code.data()),
+      code.size());
+    
+    // Write back resource slot infos
     for (uint32_t i = 0; i < slotCount; i++)
       m_slots.push_back(slotInfos[i]);
     

src/dxvk/dxvk_shader.h

@@ -170,10 +170,21 @@ namespace dxvk {
       m_debugName = name;
     }
     
+    /**
+     * \brief Shader hash
+     * 
+     * The SHA-1 hash of the generated SPIR-V shader.
+     * \returns SHA-1 hash of this shader
+     */
+    Sha1Hash hash() const {
+      return m_hash;
+    }
+    
   private:
     
     VkShaderStageFlagBits m_stage;
     SpirvCodeBuffer       m_code;
+    Sha1Hash              m_hash;
     
     std::vector<DxvkResourceSlot> m_slots;
     std::vector<size_t>           m_idOffsets;