From 93cf2b3ca8edeb1e8f1e00182f920b8d50664ed5 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Tue, 7 Feb 2023 21:33:57 -0500
Subject: texture_cache: OpenGL: Implement MSAA uploads and copies

---
 src/video_core/texture_cache/formatter.cpp   |  3 +++
 src/video_core/texture_cache/texture_cache.h | 14 +++++++-------
 src/video_core/texture_cache/util.cpp        |  5 -----
 3 files changed, 10 insertions(+), 12 deletions(-)

(limited to 'src/video_core/texture_cache')

diff --git a/src/video_core/texture_cache/formatter.cpp b/src/video_core/texture_cache/formatter.cpp
index 418890126..30f72361d 100644
--- a/src/video_core/texture_cache/formatter.cpp
+++ b/src/video_core/texture_cache/formatter.cpp
@@ -22,6 +22,9 @@ std::string Name(const ImageBase& image) {
     const u32 num_layers = image.info.resources.layers;
     const u32 num_levels = image.info.resources.levels;
     std::string resource;
+    if (image.info.num_samples > 1) {
+        resource += fmt::format(":{}xMSAA", image.info.num_samples);
+    }
     if (num_layers > 1) {
         resource += fmt::format(":L{}", num_layers);
     }
diff --git a/src/video_core/texture_cache/texture_cache.h b/src/video_core/texture_cache/texture_cache.h
index 1b01990a4..3e2cbb0b0 100644
--- a/src/video_core/texture_cache/texture_cache.h
+++ b/src/video_core/texture_cache/texture_cache.h
@@ -773,7 +773,7 @@ void TextureCache<P>::RefreshContents(Image& image, ImageId image_id) {
     image.flags &= ~ImageFlagBits::CpuModified;
     TrackImage(image, image_id);
 
-    if (image.info.num_samples > 1) {
+    if (image.info.num_samples > 1 && !runtime.CanUploadMSAA()) {
         LOG_WARNING(HW_GPU, "MSAA image uploads are not implemented");
         return;
     }
@@ -1167,14 +1167,14 @@ ImageId TextureCache<P>::JoinImages(const ImageInfo& info, GPUVAddr gpu_addr, VA
         if (True(overlap.flags & ImageFlagBits::GpuModified)) {
             new_image.flags |= ImageFlagBits::GpuModified;
         }
+        const auto& resolution = Settings::values.resolution_info;
+        const SubresourceBase base = new_image.TryFindBase(overlap.gpu_addr).value();
+        const u32 up_scale = can_rescale ? resolution.up_scale : 1;
+        const u32 down_shift = can_rescale ? resolution.down_shift : 0;
+        auto copies = MakeShrinkImageCopies(new_info, overlap.info, base, up_scale, down_shift);
         if (overlap.info.num_samples != new_image.info.num_samples) {
-            LOG_WARNING(HW_GPU, "Copying between images with different samples is not implemented");
+            runtime.CopyImageMSAA(new_image, overlap, std::move(copies));
         } else {
-            const auto& resolution = Settings::values.resolution_info;
-            const SubresourceBase base = new_image.TryFindBase(overlap.gpu_addr).value();
-            const u32 up_scale = can_rescale ? resolution.up_scale : 1;
-            const u32 down_shift = can_rescale ? resolution.down_shift : 0;
-            auto copies = MakeShrinkImageCopies(new_info, overlap.info, base, up_scale, down_shift);
             runtime.CopyImage(new_image, overlap, std::move(copies));
         }
         if (True(overlap.flags & ImageFlagBits::Tracked)) {
diff --git a/src/video_core/texture_cache/util.cpp b/src/video_core/texture_cache/util.cpp
index 03acc68d9..697f86641 100644
--- a/src/video_core/texture_cache/util.cpp
+++ b/src/video_core/texture_cache/util.cpp
@@ -573,10 +573,6 @@ u32 CalculateUnswizzledSizeBytes(const ImageInfo& info) noexcept {
     if (info.type == ImageType::Buffer) {
         return info.size.width * BytesPerBlock(info.format);
     }
-    if (info.num_samples > 1) {
-        // Multisample images can't be uploaded or downloaded to the host
-        return 0;
-    }
     if (info.type == ImageType::Linear) {
         return info.pitch * Common::DivCeil(info.size.height, DefaultBlockHeight(info.format));
     }
@@ -703,7 +699,6 @@ ImageViewType RenderTargetImageViewType(const ImageInfo& info) noexcept {
 std::vector<ImageCopy> MakeShrinkImageCopies(const ImageInfo& dst, const ImageInfo& src,
                                              SubresourceBase base, u32 up_scale, u32 down_shift) {
     ASSERT(dst.resources.levels >= src.resources.levels);
-    ASSERT(dst.num_samples == src.num_samples);
 
     const bool is_dst_3d = dst.type == ImageType::e3D;
     if (is_dst_3d) {
-- 
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