Merge remote-tracking branch 'upstream/master' into int-flags

1 files changed, 55 insertions, 0 deletions

diff --git a/src/video_core/texture_cache/samples_helper.h b/src/video_core/texture_cache/samples_helper.h
new file mode 100644
index 000000000..04539a43c
--- /dev/null
+++ b/src/video_core/texture_cache/samples_helper.h
@@ -0,0 +1,55 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <utility>
+
+#include "common/assert.h"
+#include "video_core/textures/texture.h"
+
+namespace VideoCommon {
+
+[[nodiscard]] inline std::pair<int, int> SamplesLog2(int num_samples) {
+    switch (num_samples) {
+    case 1:
+        return {0, 0};
+    case 2:
+        return {1, 0};
+    case 4:
+        return {1, 1};
+    case 8:
+        return {2, 1};
+    case 16:
+        return {2, 2};
+    }
+    UNREACHABLE_MSG("Invalid number of samples={}", num_samples);
+    return {1, 1};
+}
+
+[[nodiscard]] inline int NumSamples(Tegra::Texture::MsaaMode msaa_mode) {
+    using Tegra::Texture::MsaaMode;
+    switch (msaa_mode) {
+    case MsaaMode::Msaa1x1:
+        return 1;
+    case MsaaMode::Msaa2x1:
+    case MsaaMode::Msaa2x1_D3D:
+        return 2;
+    case MsaaMode::Msaa2x2:
+    case MsaaMode::Msaa2x2_VC4:
+    case MsaaMode::Msaa2x2_VC12:
+        return 4;
+    case MsaaMode::Msaa4x2:
+    case MsaaMode::Msaa4x2_D3D:
+    case MsaaMode::Msaa4x2_VC8:
+    case MsaaMode::Msaa4x2_VC24:
+        return 8;
+    case MsaaMode::Msaa4x4:
+        return 16;
+    }
+    UNREACHABLE_MSG("Invalid MSAA mode={}", static_cast<int>(msaa_mode));
+    return 1;
+}
+
+} // namespace VideoCommon