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.

1 files changed, 189 insertions, 0 deletions

diff --git a/src/video_core/texture_cache/image_info.cpp b/src/video_core/texture_cache/image_info.cpp
new file mode 100644
index 000000000..64fd7010a
--- /dev/null
+++ b/src/video_core/texture_cache/image_info.cpp
@@ -0,0 +1,189 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "video_core/surface.h"
+#include "video_core/texture_cache/format_lookup_table.h"
+#include "video_core/texture_cache/image_info.h"
+#include "video_core/texture_cache/samples_helper.h"
+#include "video_core/texture_cache/types.h"
+#include "video_core/texture_cache/util.h"
+#include "video_core/textures/texture.h"
+
+namespace VideoCommon {
+
+using Tegra::Texture::TextureType;
+using Tegra::Texture::TICEntry;
+using VideoCore::Surface::PixelFormat;
+
+ImageInfo::ImageInfo(const TICEntry& config) noexcept {
+    format = PixelFormatFromTextureInfo(config.format, config.r_type, config.g_type, config.b_type,
+                                        config.a_type, config.srgb_conversion);
+    num_samples = NumSamples(config.msaa_mode);
+    resources.levels = config.max_mip_level + 1;
+    if (config.IsPitchLinear()) {
+        pitch = config.Pitch();
+    } else if (config.IsBlockLinear()) {
+        block = Extent3D{
+            .width = config.block_width,
+            .height = config.block_height,
+            .depth = config.block_depth,
+        };
+    }
+    tile_width_spacing = config.tile_width_spacing;
+    if (config.texture_type != TextureType::Texture2D &&
+        config.texture_type != TextureType::Texture2DNoMipmap) {
+        ASSERT(!config.IsPitchLinear());
+    }
+    switch (config.texture_type) {
+    case TextureType::Texture1D:
+        ASSERT(config.BaseLayer() == 0);
+        type = ImageType::e1D;
+        size.width = config.Width();
+        break;
+    case TextureType::Texture1DArray:
+        UNIMPLEMENTED_IF(config.BaseLayer() != 0);
+        type = ImageType::e1D;
+        size.width = config.Width();
+        resources.layers = config.Depth();
+        break;
+    case TextureType::Texture2D:
+    case TextureType::Texture2DNoMipmap:
+        ASSERT(config.Depth() == 1);
+        type = config.IsPitchLinear() ? ImageType::Linear : ImageType::e2D;
+        size.width = config.Width();
+        size.height = config.Height();
+        resources.layers = config.BaseLayer() + 1;
+        break;
+    case TextureType::Texture2DArray:
+        type = ImageType::e2D;
+        size.width = config.Width();
+        size.height = config.Height();
+        resources.layers = config.BaseLayer() + config.Depth();
+        break;
+    case TextureType::TextureCubemap:
+        ASSERT(config.Depth() == 1);
+        type = ImageType::e2D;
+        size.width = config.Width();
+        size.height = config.Height();
+        resources.layers = config.BaseLayer() + 6;
+        break;
+    case TextureType::TextureCubeArray:
+        UNIMPLEMENTED_IF(config.load_store_hint != 0);
+        type = ImageType::e2D;
+        size.width = config.Width();
+        size.height = config.Height();
+        resources.layers = config.BaseLayer() + config.Depth() * 6;
+        break;
+    case TextureType::Texture3D:
+        ASSERT(config.BaseLayer() == 0);
+        type = ImageType::e3D;
+        size.width = config.Width();
+        size.height = config.Height();
+        size.depth = config.Depth();
+        break;
+    case TextureType::Texture1DBuffer:
+        type = ImageType::Buffer;
+        size.width = config.Width();
+        break;
+    default:
+        UNREACHABLE_MSG("Invalid texture_type={}", static_cast<int>(config.texture_type.Value()));
+        break;
+    }
+    if (type != ImageType::Linear) {
+        // FIXME: Call this without passing *this
+        layer_stride = CalculateLayerStride(*this);
+        maybe_unaligned_layer_stride = CalculateLayerSize(*this);
+    }
+}
+
+ImageInfo::ImageInfo(const Tegra::Engines::Maxwell3D::Regs& regs, size_t index) noexcept {
+    const auto& rt = regs.rt[index];
+    format = VideoCore::Surface::PixelFormatFromRenderTargetFormat(rt.format);
+    if (rt.tile_mode.is_pitch_linear) {
+        ASSERT(rt.tile_mode.is_3d == 0);
+        type = ImageType::Linear;
+        pitch = rt.width;
+        size = Extent3D{
+            .width = pitch / BytesPerBlock(format),
+            .height = rt.height,
+            .depth = 1,
+        };
+        return;
+    }
+    size.width = rt.width;
+    size.height = rt.height;
+    layer_stride = rt.layer_stride * 4;
+    maybe_unaligned_layer_stride = layer_stride;
+    num_samples = NumSamples(regs.multisample_mode);
+    block = Extent3D{
+        .width = rt.tile_mode.block_width,
+        .height = rt.tile_mode.block_height,
+        .depth = rt.tile_mode.block_depth,
+    };
+    if (rt.tile_mode.is_3d) {
+        type = ImageType::e3D;
+        size.depth = rt.depth;
+    } else {
+        type = ImageType::e2D;
+        resources.layers = rt.depth;
+    }
+}
+
+ImageInfo::ImageInfo(const Tegra::Engines::Maxwell3D::Regs& regs) noexcept {
+    format = VideoCore::Surface::PixelFormatFromDepthFormat(regs.zeta.format);
+    size.width = regs.zeta_width;
+    size.height = regs.zeta_height;
+    resources.levels = 1;
+    layer_stride = regs.zeta.layer_stride * 4;
+    maybe_unaligned_layer_stride = layer_stride;
+    num_samples = NumSamples(regs.multisample_mode);
+    block = Extent3D{
+        .width = regs.zeta.tile_mode.block_width,
+        .height = regs.zeta.tile_mode.block_height,
+        .depth = regs.zeta.tile_mode.block_depth,
+    };
+    if (regs.zeta.tile_mode.is_pitch_linear) {
+        ASSERT(regs.zeta.tile_mode.is_3d == 0);
+        type = ImageType::Linear;
+        pitch = size.width * BytesPerBlock(format);
+    } else if (regs.zeta.tile_mode.is_3d) {
+        ASSERT(regs.zeta.tile_mode.is_pitch_linear == 0);
+        type = ImageType::e3D;
+        size.depth = regs.zeta_depth;
+    } else {
+        type = ImageType::e2D;
+        resources.layers = regs.zeta_depth;
+    }
+}
+
+ImageInfo::ImageInfo(const Tegra::Engines::Fermi2D::Surface& config) noexcept {
+    UNIMPLEMENTED_IF_MSG(config.layer != 0, "Surface layer is not zero");
+    format = VideoCore::Surface::PixelFormatFromRenderTargetFormat(config.format);
+    if (config.linear == Tegra::Engines::Fermi2D::MemoryLayout::Pitch) {
+        type = ImageType::Linear;
+        size = Extent3D{
+            .width = config.pitch / VideoCore::Surface::BytesPerBlock(format),
+            .height = config.height,
+            .depth = 1,
+        };
+        pitch = config.pitch;
+    } else {
+        type = config.block_depth > 0 ? ImageType::e3D : ImageType::e2D;
+        block = Extent3D{
+            .width = config.block_width,
+            .height = config.block_height,
+            .depth = config.block_depth,
+        };
+        // 3D blits with more than once slice are not implemented for now
+        // Render to individual slices
+        size = Extent3D{
+            .width = config.width,
+            .height = config.height,
+            .depth = 1,
+        };
+    }
+}
+
+} // namespace VideoCommon