Shade the sky and the sun by the scenery around the camera instead of the track environment flags

rendering/vulkan14/vulkan14skyocclusion.h

@@ -0,0 +1,79 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+// the maps of the occlusion of the sky by the scenery in the vulkan renderer (the track T, opengl46_sky_occlusion): the images of
+// gfx::sky_occlusion, which works out what goes into them. the squares of the tiles it gives are gathered in a frame and copied at
+// once from one staging buffer, with the commands of the frame (flush())
+
+#pragma once
+
+#include "rendering/common/skyocclusion.h"
+#include "rendering/vulkan14/vulkan14memory.h"
+
+#include <memory>
+
+namespace vk14
+{
+
+class command_stream;
+
+class sky_occlusion_maps : public gfx::sky_occlusion
+{
+  public:
+	sky_occlusion_maps() = default;
+	~sky_occlusion_maps() override;
+
+	// Memory, Deletions: what the maps are made and let go with; called once
+	void init(allocator &Memory, deletion_queue &Deletions);
+	// the maps go (the device is about to)
+	void destroy();
+	// the value of the timeline the gpu reaches when it's done with the frame being recorded
+	void begin_frame(std::uint64_t const Value)
+	{
+		m_value = Value;
+	}
+	// the squares given in the frame copied to the maps, which are left in the layout the shading reads them in
+	void flush(command_stream *Commands);
+	// the maps once they're filled, for the pass sets; null: the stand-ins are read
+	image *heights() const
+	{
+		return m_ready ? m_heights.get() : nullptr;
+	}
+	image *occlusion() const
+	{
+		return m_ready ? m_occlusion.get() : nullptr;
+	}
+
+  protected:
+	bool gpu_allocate(int const Side) override;
+	void gpu_release() override;
+	void gpu_upload(int const X, int const Y, int const Size, float const *Heights, std::uint16_t const *Occlusion) override;
+
+  private:
+	void let_go();
+
+	allocator *m_memory{nullptr};
+	deletion_queue *m_deletions{nullptr};
+	std::uint64_t m_value{0};
+	std::shared_ptr<image> m_heights;
+	std::shared_ptr<image> m_occlusion;
+	bool m_ready{false};
+	// the squares waiting for the copy: where, and their data one after another (the heights, then the occlusion of each)
+	struct square
+	{
+		int x;
+		int y;
+		int size;
+		std::size_t offset; // of the heights in m_data
+	};
+	std::vector<square> m_squares;
+	std::vector<std::uint8_t> m_data;
+};
+
+} // namespace vk14