From b780d5b5c580a65a670de73140b743072efc0fd2 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Tue, 13 Jul 2021 03:33:08 +0200
Subject: DMAEngine: Accelerate BufferClear

---
 src/video_core/renderer_opengl/gl_buffer_cache.cpp | 6 ++++++
 src/video_core/renderer_opengl/gl_buffer_cache.h   | 2 ++
 src/video_core/renderer_opengl/gl_rasterizer.cpp   | 5 +++++
 src/video_core/renderer_opengl/gl_rasterizer.h     | 2 ++
 4 files changed, 15 insertions(+)

(limited to 'src/video_core/renderer_opengl')

diff --git a/src/video_core/renderer_opengl/gl_buffer_cache.cpp b/src/video_core/renderer_opengl/gl_buffer_cache.cpp
index c225d1fc9..c4189fb60 100644
--- a/src/video_core/renderer_opengl/gl_buffer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_buffer_cache.cpp
@@ -98,6 +98,12 @@ void BufferCacheRuntime::CopyBuffer(Buffer& dst_buffer, Buffer& src_buffer,
     }
 }
 
+void BufferCacheRuntime::ClearBuffer(Buffer& dest_buffer, u32 offset, size_t size, u32 value) {
+    glClearNamedBufferSubData(dest_buffer.Handle(), GL_R32UI, static_cast<GLintptr>(offset),
+                              static_cast<GLsizeiptr>(size / sizeof(u32)), GL_RGBA, GL_UNSIGNED_INT,
+                              &value);
+}
+
 void BufferCacheRuntime::BindIndexBuffer(Buffer& buffer, u32 offset, u32 size) {
     if (has_unified_vertex_buffers) {
         buffer.MakeResident(GL_READ_ONLY);
diff --git a/src/video_core/renderer_opengl/gl_buffer_cache.h b/src/video_core/renderer_opengl/gl_buffer_cache.h
index d8b20a9af..fe91aa452 100644
--- a/src/video_core/renderer_opengl/gl_buffer_cache.h
+++ b/src/video_core/renderer_opengl/gl_buffer_cache.h
@@ -57,6 +57,8 @@ public:
     void CopyBuffer(Buffer& dst_buffer, Buffer& src_buffer,
                     std::span<const VideoCommon::BufferCopy> copies);
 
+    void ClearBuffer(Buffer& dest_buffer, u32 offset, size_t size, u32 value);
+
     void BindIndexBuffer(Buffer& buffer, u32 offset, u32 size);
 
     void BindVertexBuffer(u32 index, Buffer& buffer, u32 offset, u32 size, u32 stride);
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 82c84127a..ceb3abcb2 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -1407,4 +1407,9 @@ bool AccelerateDMA::BufferCopy(GPUVAddr src_address, GPUVAddr dest_address, u64
     return buffer_cache.DMACopy(src_address, dest_address, amount);
 }
 
+bool AccelerateDMA::BufferClear(GPUVAddr src_address, u64 amount, u32 value) {
+    std::scoped_lock lock{buffer_cache.mutex};
+    return buffer_cache.DMAClear(src_address, amount, value);
+}
+
 } // namespace OpenGL
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index ccee9ba33..d30ad698f 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -65,6 +65,8 @@ public:
 
     bool BufferCopy(GPUVAddr src_address, GPUVAddr dest_address, u64 amount) override;
 
+    bool BufferClear(GPUVAddr src_address, u64 amount, u32 value) override;
+
 private:
     BufferCache& buffer_cache;
 };
-- 
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