From 9764c13d6d2977903f407761b27d847c0056e1c4 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Wed, 30 Dec 2020 02:25:23 -0300
Subject: video_core: Rewrite the texture cache

The current texture cache has several points that hurt maintainability
and performance. It's easy to break unrelated parts of the cache
when doing minor changes. The cache can easily forget valuable
information about the cached textures by CPU writes or simply by its
normal usage.The current texture cache has several points that hurt
maintainability and performance. It's easy to break unrelated parts
of the cache when doing minor changes. The cache can easily forget
valuable information about the cached textures by CPU writes or simply
by its normal usage.

This commit aims to address those issues.
---
 src/video_core/texture_cache/util.h | 107 ++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 src/video_core/texture_cache/util.h

(limited to 'src/video_core/texture_cache/util.h')

diff --git a/src/video_core/texture_cache/util.h b/src/video_core/texture_cache/util.h
new file mode 100644
index 000000000..dbbbd33cd
--- /dev/null
+++ b/src/video_core/texture_cache/util.h
@@ -0,0 +1,107 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <optional>
+#include <span>
+
+#include "common/common_types.h"
+
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/surface.h"
+#include "video_core/texture_cache/image_base.h"
+#include "video_core/texture_cache/image_view_base.h"
+#include "video_core/texture_cache/types.h"
+#include "video_core/textures/texture.h"
+
+namespace VideoCommon {
+
+using Tegra::Texture::TICEntry;
+
+struct OverlapResult {
+    GPUVAddr gpu_addr;
+    VAddr cpu_addr;
+    SubresourceExtent resources;
+};
+
+[[nodiscard]] u32 CalculateGuestSizeInBytes(const ImageInfo& info) noexcept;
+
+[[nodiscard]] u32 CalculateUnswizzledSizeBytes(const ImageInfo& info) noexcept;
+
+[[nodiscard]] u32 CalculateConvertedSizeBytes(const ImageInfo& info) noexcept;
+
+[[nodiscard]] u32 CalculateLayerStride(const ImageInfo& info) noexcept;
+
+[[nodiscard]] u32 CalculateLayerSize(const ImageInfo& info) noexcept;
+
+[[nodiscard]] std::array<u32, MAX_MIP_LEVELS> CalculateMipLevelOffsets(
+    const ImageInfo& info) noexcept;
+
+[[nodiscard]] std::vector<u32> CalculateSliceOffsets(const ImageInfo& info);
+
+[[nodiscard]] std::vector<SubresourceBase> CalculateSliceSubresources(const ImageInfo& info);
+
+[[nodiscard]] u32 CalculateLevelStrideAlignment(const ImageInfo& info, u32 level);
+
+[[nodiscard]] VideoCore::Surface::PixelFormat PixelFormatFromTIC(
+    const Tegra::Texture::TICEntry& config) noexcept;
+
+[[nodiscard]] ImageViewType RenderTargetImageViewType(const ImageInfo& info) noexcept;
+
+[[nodiscard]] std::vector<ImageCopy> MakeShrinkImageCopies(const ImageInfo& dst,
+                                                           const ImageInfo& src,
+                                                           SubresourceBase base);
+
+[[nodiscard]] bool IsValidAddress(const Tegra::MemoryManager& gpu_memory, const TICEntry& config);
+
+[[nodiscard]] std::vector<BufferImageCopy> UnswizzleImage(Tegra::MemoryManager& gpu_memory,
+                                                          GPUVAddr gpu_addr, const ImageInfo& info,
+                                                          std::span<u8> output);
+
+[[nodiscard]] BufferCopy UploadBufferCopy(Tegra::MemoryManager& gpu_memory, GPUVAddr gpu_addr,
+                                          const ImageBase& image, std::span<u8> output);
+
+void ConvertImage(std::span<const u8> input, const ImageInfo& info, std::span<u8> output,
+                  std::span<BufferImageCopy> copies);
+
+[[nodiscard]] std::vector<BufferImageCopy> FullDownloadCopies(const ImageInfo& info);
+
+[[nodiscard]] Extent3D MipSize(Extent3D size, u32 level);
+
+[[nodiscard]] Extent3D MipBlockSize(const ImageInfo& info, u32 level);
+
+[[nodiscard]] std::vector<SwizzleParameters> FullUploadSwizzles(const ImageInfo& info);
+
+void SwizzleImage(Tegra::MemoryManager& gpu_memory, GPUVAddr gpu_addr, const ImageInfo& info,
+                  std::span<const BufferImageCopy> copies, std::span<const u8> memory);
+
+[[nodiscard]] bool IsBlockLinearSizeCompatible(const ImageInfo& new_info,
+                                               const ImageInfo& overlap_info, u32 new_level,
+                                               u32 overlap_level, bool strict_size) noexcept;
+
+[[nodiscard]] bool IsPitchLinearSameSize(const ImageInfo& lhs, const ImageInfo& rhs,
+                                         bool strict_size) noexcept;
+
+[[nodiscard]] std::optional<OverlapResult> ResolveOverlap(const ImageInfo& new_info,
+                                                          GPUVAddr gpu_addr, VAddr cpu_addr,
+                                                          const ImageBase& overlap,
+                                                          bool strict_size);
+
+[[nodiscard]] bool IsLayerStrideCompatible(const ImageInfo& lhs, const ImageInfo& rhs);
+
+[[nodiscard]] std::optional<SubresourceBase> FindSubresource(const ImageInfo& candidate,
+                                                             const ImageBase& image,
+                                                             GPUVAddr candidate_addr,
+                                                             RelaxedOptions options);
+
+[[nodiscard]] bool IsSubresource(const ImageInfo& candidate, const ImageBase& image,
+                                 GPUVAddr candidate_addr, RelaxedOptions options);
+
+void DeduceBlitImages(ImageInfo& dst_info, ImageInfo& src_info, const ImageBase* dst,
+                      const ImageBase* src);
+
+[[nodiscard]] u32 MapSizeBytes(const ImageBase& image);
+
+} // namespace VideoCommon
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