1 files changed, 118 insertions, 0 deletions

diff --git a/src/video_core/texture_cache/surface_base.cpp b/src/video_core/texture_cache/surface_base.cpp
new file mode 100644
index 000000000..8680485b4
--- /dev/null
+++ b/src/video_core/texture_cache/surface_base.cpp
@@ -0,0 +1,118 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/morton.h"
+#include "video_core/texture_cache/surface_base.h"
+#include "video_core/texture_cache/surface_params.h"
+#include "video_core/textures/convert.h"
+
+namespace VideoCommon {
+
+using Tegra::Texture::ConvertFromGuestToHost;
+using VideoCore::MortonSwizzleMode;
+
+namespace {
+void SwizzleFunc(MortonSwizzleMode mode, u8* memory, const SurfaceParams& params, u8* buffer,
+                 u32 level) {
+    const u32 width{params.GetMipWidth(level)};
+    const u32 height{params.GetMipHeight(level)};
+    const u32 block_height{params.GetMipBlockHeight(level)};
+    const u32 block_depth{params.GetMipBlockDepth(level)};
+
+    std::size_t guest_offset{params.GetGuestMipmapLevelOffset(level)};
+    if (params.IsLayered()) {
+        std::size_t host_offset{0};
+        const std::size_t guest_stride = params.GetGuestLayerSize();
+        const std::size_t host_stride = params.GetHostLayerSize(level);
+        for (u32 layer = 0; layer < params.GetNumLayers(); layer++) {
+            MortonSwizzle(mode, params.GetPixelFormat(), width, block_height, height, block_depth,
+                          1, params.GetTileWidthSpacing(), buffer + host_offset,
+                          memory + guest_offset);
+            guest_offset += guest_stride;
+            host_offset += host_stride;
+        }
+    } else {
+        MortonSwizzle(mode, params.GetPixelFormat(), width, block_height, height, block_depth,
+                      params.GetMipDepth(level), params.GetTileWidthSpacing(), buffer,
+                      memory + guest_offset);
+    }
+}
+} // Anonymous namespace
+
+SurfaceBaseImpl::SurfaceBaseImpl(const SurfaceParams& params) : params{params} {
+    staging_buffer.resize(params.GetHostSizeInBytes());
+}
+
+SurfaceBaseImpl::~SurfaceBaseImpl() = default;
+
+void SurfaceBaseImpl::LoadBuffer() {
+    if (params.IsTiled()) {
+        ASSERT_MSG(params.GetBlockWidth() == 1, "Block width is defined as {} on texture target {}",
+                   params.GetBlockWidth(), static_cast<u32>(params.GetTarget()));
+        for (u32 level = 0; level < params.GetNumLevels(); ++level) {
+            u8* const buffer{GetStagingBufferLevelData(level)};
+            SwizzleFunc(MortonSwizzleMode::MortonToLinear, host_ptr, params, buffer, level);
+        }
+    } else {
+        ASSERT_MSG(params.GetNumLevels() == 1, "Linear mipmap loading is not implemented");
+        const u32 bpp{GetFormatBpp(params.GetPixelFormat()) / CHAR_BIT};
+        const u32 block_width{params.GetDefaultBlockWidth()};
+        const u32 block_height{params.GetDefaultBlockHeight()};
+        const u32 width{(params.GetWidth() + block_width - 1) / block_width};
+        const u32 height{(params.GetHeight() + block_height - 1) / block_height};
+        const u32 copy_size{width * bpp};
+        if (params.GetPitch() == copy_size) {
+            std::memcpy(staging_buffer.data(), host_ptr, params.GetHostSizeInBytes());
+        } else {
+            const u8* start{host_ptr};
+            u8* write_to{staging_buffer.data()};
+            for (u32 h = height; h > 0; --h) {
+                std::memcpy(write_to, start, copy_size);
+                start += params.GetPitch();
+                write_to += copy_size;
+            }
+        }
+    }
+
+    for (u32 level = 0; level < params.GetNumLevels(); ++level) {
+        ConvertFromGuestToHost(GetStagingBufferLevelData(level), params.GetPixelFormat(),
+                               params.GetMipWidth(level), params.GetMipHeight(level),
+                               params.GetMipDepth(level), true, true);
+    }
+}
+
+void SurfaceBaseImpl::FlushBuffer() {
+    if (params.IsTiled()) {
+        ASSERT_MSG(params.GetBlockWidth() == 1, "Block width is defined as {}",
+                   params.GetBlockWidth());
+        for (u32 level = 0; level < params.GetNumLevels(); ++level) {
+            u8* const buffer = GetStagingBufferLevelData(level);
+            SwizzleFunc(MortonSwizzleMode::LinearToMorton, GetHostPtr(), params, buffer, level);
+        }
+    } else {
+        UNIMPLEMENTED();
+        /*
+        ASSERT(params.GetTarget() == SurfaceTarget::Texture2D);
+        ASSERT(params.GetNumLevels() == 1);
+
+        const u32 bpp{params.GetFormatBpp() / 8};
+        const u32 copy_size{params.GetWidth() * bpp};
+        if (params.GetPitch() == copy_size) {
+            std::memcpy(host_ptr, staging_buffer.data(), GetSizeInBytes());
+        } else {
+            u8* start{host_ptr};
+            const u8* read_to{staging_buffer.data()};
+            for (u32 h = params.GetHeight(); h > 0; --h) {
+                std::memcpy(start, read_to, copy_size);
+                start += params.GetPitch();
+                read_to += copy_size;
+            }
+        }
+        */
+    }
+}
+
+} // namespace VideoCommon