* vk renderer2: started work on scratch commands

CMakeLists.txt

@@ -161,6 +161,7 @@ add_library(topaz STATIC
 	src/tz/gl/impl/vulkan/renderer.inl
 	src/tz/gl/impl/vulkan/renderer2.cpp
 	src/tz/gl/impl/vulkan/renderer2.hpp
+	src/tz/gl/impl/vulkan/renderer2.inl
 	# tz::gl (OpenGL Frontend)
 	src/tz/gl/impl/opengl/component.cpp
 	src/tz/gl/impl/opengl/component.hpp

src/tz/gl/impl/vulkan/renderer2.cpp

@@ -500,7 +500,17 @@ namespace tz::gl
 	void renderer_command_processor::scratch_initialise_static_resources()
 	{
 		TZ_PROFZONE("renderer_command_processor - scratch initialise static resources", 0xFFAAAA00);
-		// NYI	
+		// now the scratch buffer might've already been recorded earlier with commands. if so, we need to realloc it.
+		if(this->scratch_command_buffer().command_count() > 0)
+		{
+			// allocate already purges previous alloc, so just need to call free_commands aswell.
+			this->allocate_commands(command_type::scratch);
+		}
+		this->do_scratch_work([](vk2::CommandBufferRecording& record)
+		{
+			(void)record;
+			tz::error("NYI");
+		});
 	}
 
 	std::span<vk2::CommandBuffer> renderer_command_processor::work_command_buffers()

src/tz/gl/impl/vulkan/renderer2.hpp

@@ -2,6 +2,7 @@
 #define TZ_GL_IMPL_VULKAN_RENDERER2_HPP
 #include "tz/gl/api/renderer.hpp"
 #include "tz/core/memory/maybe_owned_ptr.hpp"
+#include "tz/core/types.hpp"
 #include "tz/gl/impl/vulkan/component.hpp"
 #include "tz/gl/impl/common/renderer.hpp"
 
@@ -77,6 +78,7 @@ namespace tz::gl
 		renderer_command_processor(const tz::gl::renderer_info& info);
 		~renderer_command_processor();
 		renderer_command_processor() = default;
+		void do_scratch_work(tz::action<vk2::CommandBufferRecording&> auto record_commands);
 
 		enum class command_type
 		{
@@ -125,4 +127,5 @@ namespace tz::gl
 	static_assert(tz::gl::renderer_type<renderer_vulkan2>);
 }
 
+#include "tz/gl/impl/vulkan/renderer2.inl"
 #endif // TZ_GL_IMPL_VULKAN_RENDERER2_HPP

src/tz/gl/impl/vulkan/renderer2.inl

@@ -0,0 +1,13 @@
+namespace tz::gl
+{
+	void renderer_command_processor::do_scratch_work(tz::action<vk2::CommandBufferRecording&> auto record_commands)
+	{
+		// firstly record the commands requested.
+		{
+		vk2::CommandBufferRecording rec = this->scratch_command_buffer().record();
+		record_commands(rec);
+		}
+		// then, execute them.
+		tz::error("NYI");
+	}
+}