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/image_view_info.h | 50 ++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 src/video_core/texture_cache/image_view_info.h

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

diff --git a/src/video_core/texture_cache/image_view_info.h b/src/video_core/texture_cache/image_view_info.h
new file mode 100644
index 000000000..0c1f99117
--- /dev/null
+++ b/src/video_core/texture_cache/image_view_info.h
@@ -0,0 +1,50 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <type_traits>
+
+#include "video_core/surface.h"
+#include "video_core/texture_cache/types.h"
+#include "video_core/textures/texture.h"
+
+namespace VideoCommon {
+
+using Tegra::Texture::SwizzleSource;
+using Tegra::Texture::TICEntry;
+using VideoCore::Surface::PixelFormat;
+
+/// Properties used to determine a image view
+struct ImageViewInfo {
+    explicit ImageViewInfo() noexcept = default;
+    explicit ImageViewInfo(const TICEntry& config, s32 base_layer) noexcept;
+    explicit ImageViewInfo(ImageViewType type, PixelFormat format,
+                           SubresourceRange range = {}) noexcept;
+
+    auto operator<=>(const ImageViewInfo&) const noexcept = default;
+
+    [[nodiscard]] bool IsRenderTarget() const noexcept;
+
+    [[nodiscard]] std::array<SwizzleSource, 4> Swizzle() const noexcept {
+        return std::array{
+            static_cast<SwizzleSource>(x_source),
+            static_cast<SwizzleSource>(y_source),
+            static_cast<SwizzleSource>(z_source),
+            static_cast<SwizzleSource>(w_source),
+        };
+    }
+
+    ImageViewType type{};
+    PixelFormat format{};
+    SubresourceRange range;
+    u8 x_source = static_cast<u8>(SwizzleSource::R);
+    u8 y_source = static_cast<u8>(SwizzleSource::G);
+    u8 z_source = static_cast<u8>(SwizzleSource::B);
+    u8 w_source = static_cast<u8>(SwizzleSource::A);
+};
+static_assert(std::has_unique_object_representations_v<ImageViewInfo>);
+
+} // namespace VideoCommon
-- 
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