surface_base: Implement texture buffer flushes

Implement downloads to guest memory from texture buffers on the generic
cache and OpenGL.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/video_core/renderer_opengl/gl_texture_cache.cpp b/src/video_core/renderer_opengl/gl_texture_cache.cpp
index d4b81cd87..5c1ae1418 100644
--- a/src/video_core/renderer_opengl/gl_texture_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_texture_cache.cpp
@@ -260,6 +260,13 @@ CachedSurface::~CachedSurface() = default;
 void CachedSurface::DownloadTexture(std::vector<u8>& staging_buffer) {
     MICROPROFILE_SCOPE(OpenGL_Texture_Download);
 
+    if (params.IsBuffer()) {
+        glGetNamedBufferSubData(texture_buffer.handle, 0,
+                                static_cast<GLsizeiptr>(params.GetHostSizeInBytes()),
+                                staging_buffer.data());
+        return;
+    }
+
     SCOPE_EXIT({ glPixelStorei(GL_PACK_ROW_LENGTH, 0); });
 
     for (u32 level = 0; level < params.emulated_levels; ++level) {