Add dynamic exposure correction (#12959)

[minetest.git] / src / client / shader.h

diff --git a/src/client/shader.h b/src/client/shader.h
index 8f1ba1e4153cc87e21062eab6637ab34616d54d9..33c3e45e3087628ad9466ec2def4efe3450851ce 100644 (file)
--- a/src/client/shader.h
+++ b/src/client/shader.h
@@ -121,6 +121,43 @@ class CachedVertexShaderSetting : public CachedShaderSetting<T, count, cache> {
                CachedShaderSetting<T, count, cache>(name, false){}
 };
 
+template <typename T, std::size_t count, bool cache, bool is_pixel>
+class CachedStructShaderSetting {
+       const char *m_name;
+       T m_sent[count];
+       bool has_been_set = false;
+       std::array<const char*, count> m_fields;
+public:
+       CachedStructShaderSetting(const char *name, std::array<const char*, count> &&fields) :
+               m_name(name), m_fields(std::move(fields))
+       {}
+
+       void set(const T value[count], video::IMaterialRendererServices *services)
+       {
+               if (cache && has_been_set && std::equal(m_sent, m_sent + count, value))
+                       return;
+
+               for (std::size_t i = 0; i < count; i++) {
+                       std::string uniform_name = std::string(m_name) + "." + m_fields[i];
+
+                       if (is_pixel)
+                               services->setPixelShaderConstant(services->getPixelShaderConstantID(uniform_name.c_str()), value + i, 1);
+                       else
+                               services->setVertexShaderConstant(services->getVertexShaderConstantID(uniform_name.c_str()), value + i, 1);
+               }
+
+               if (cache) {
+                       std::copy(value, value + count, m_sent);
+                       has_been_set = true;
+               }
+       }
+};
+
+template<typename T, std::size_t count, bool cache = true>
+using CachedStructVertexShaderSetting = CachedStructShaderSetting<T, count, cache, false>;
+
+template<typename T, std::size_t count, bool cache = true>
+using CachedStructPixelShaderSetting = CachedStructShaderSetting<T, count, cache, true>;
 
 /*
        ShaderSource creates and caches shaders.