Refactor render-test to make cross platform (#1053)

* First pass of render-test refactor.

* Make window construction a function that can choose an implementation.

* Remove OpenGL as currently has windows dependency.

* Disable Vulkan as Renderer impl has dependency on windows.

* Pass Window in as parameter of 'update'.

* Add win-window.cpp as was missing.

* Fix warning on windows about signs during comparison.

1 files changed, 40 insertions, 0 deletions

diff --git a/tools/gfx/vulkan/vk-module.h b/tools/gfx/vulkan/vk-module.h
new file mode 100644
index 000000000..4d18823ca
--- /dev/null
+++ b/tools/gfx/vulkan/vk-module.h
@@ -0,0 +1,40 @@
+// vk-module.h
+#pragma once
+
+#include "../../slang.h"
+
+#include "../../slang-com-helper.h"
+
+#if SLANG_WINDOWS_FAMILY
+#   define VK_USE_PLATFORM_WIN32_KHR 1
+#else
+#   define VK_USE_PLATFORM_XLIB_KHR 1
+#endif
+
+#define VK_NO_PROTOTYPES
+
+#include <vulkan/include/vulkan/vulkan.h>
+
+namespace gfx {
+
+struct VulkanModule
+{
+        /// true if has been initialized
+    SLANG_FORCE_INLINE bool isInitialized() const { return m_module != nullptr; }
+
+        /// Get a function by name
+    PFN_vkVoidFunction getFunction(const char* name) const;
+
+        /// Initialize
+    Slang::Result init();
+        /// Destroy
+    void destroy();
+
+        /// Dtor
+    ~VulkanModule() { destroy(); }
+
+    protected:
+    void* m_module = nullptr;
+};
+
+} // renderer_test