1 files changed, 102 insertions, 0 deletions
diff --git a/source/slang/slang-extension-tracker.cpp b/source/slang/slang-extension-tracker.cpp
new file mode 100644
index 000000000..f3818cbba
--- /dev/null
+++ b/source/slang/slang-extension-tracker.cpp
@@ -0,0 +1,102 @@
+// slang-extension-tracker.cpp
+#include "slang-extension-tracker.h"
+
+namespace Slang
+{
+
+void ShaderExtensionTracker::appendExtensionRequireLinesForGLSL(StringBuilder& ioBuilder) const
+{
+    for (const auto& extension : m_extensionPool.getSlices())
+    {
+        ioBuilder.append("#extension ");
+        ioBuilder.append(extension);
+        ioBuilder.append(" : require\n");
+    }
+}
+
+void ShaderExtensionTracker::appendExtensionRequireLinesForWGSL(StringBuilder& ioBuilder) const
+{
+    for (const auto& extension : m_extensionPool.getSlices())
+    {
+        ioBuilder.append("enable ");
+        ioBuilder.append(extension);
+        ioBuilder.append(";\n");
+    }
+}
+
+void ShaderExtensionTracker::requireSPIRVVersion(const SemanticVersion& version)
+{
+    if (version > m_spirvVersion)
+    {
+        m_spirvVersion = version;
+    }
+}
+
+void ShaderExtensionTracker::requireVersion(ProfileVersion version)
+{
+    // Check if this profile is newer
+    if ((UInt)version > (UInt)m_profileVersion)
+    {
+        m_profileVersion = version;
+    }
+}
+
+void ShaderExtensionTracker::requireBaseTypeExtension(BaseType baseType)
+{
+    uint32_t bit = 1 << int(baseType);
+    if (m_hasBaseTypeFlags & bit)
+    {
+        return;
+    }
+
+    switch (baseType)
+    {
+    case BaseType::UInt8:
+    case BaseType::Int8:
+        {
+            // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_8bit_storage.txt
+            requireExtension(UnownedStringSlice::fromLiteral("GL_EXT_shader_8bit_storage"));
+
+            // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_explicit_arithmetic_types.txt
+            requireExtension(
+                UnownedStringSlice::fromLiteral("GL_EXT_shader_explicit_arithmetic_types"));
+            break;
+        }
+    case BaseType::Half:
+    case BaseType::UInt16:
+    case BaseType::Int16:
+        {
+            // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_16bit_storage.txt
+            requireExtension(UnownedStringSlice::fromLiteral("GL_EXT_shader_16bit_storage"));
+
+            // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_explicit_arithmetic_types.txt
+            requireExtension(
+                UnownedStringSlice::fromLiteral("GL_EXT_shader_explicit_arithmetic_types"));
+            break;
+        }
+    case BaseType::UInt64:
+    case BaseType::Int64:
+        {
+            requireExtension(
+                UnownedStringSlice::fromLiteral("GL_EXT_shader_explicit_arithmetic_types_int64"));
+            m_hasBaseTypeFlags |= _getFlag(BaseType::UInt64) | _getFlag(BaseType::Int64) |
+                                  _getFlag(BaseType::IntPtr) | _getFlag(BaseType::UIntPtr);
+            break;
+        }
+    case BaseType::IntPtr:
+    case BaseType::UIntPtr:
+        {
+#if SLANG_PTR_IS_64
+            requireExtension(
+                UnownedStringSlice::fromLiteral("GL_EXT_shader_explicit_arithmetic_types_int64"));
+            m_hasBaseTypeFlags |= _getFlag(BaseType::UInt64) | _getFlag(BaseType::Int64) |
+                                  _getFlag(BaseType::IntPtr) | _getFlag(BaseType::UIntPtr);
+#endif
+            break;
+        }
+    }
+
+    m_hasBaseTypeFlags |= bit;
+}
+
+} // namespace Slang