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kuba
e1695cf87f
Ported from origin/fix/view-compatible-guest-images 7fb8fdf. Rendering as sRGB and ImageLoad/Store-ing as UNORM at the same guest address are the same surface accessed through different number formats. Recreating the guest image per number format ping-pongs content between two VkImages and loses the rendered pixels on every transition; the mutable-format image now accepts the counterpart identity and serves it through alias views. The commit names AvPlayer movie copies as the pattern that needs this. Adapted for this base: GetOrCreateGuestImage has since grown resolution scaling and 3D/array support, so the alias accept is folded into the current predicate (LogicalWidth/LogicalHeight/LogicalDepth/Type) rather than the old Width/Height pair, and the storage-counterpart widening is placed before the physical-dimension computation. The helper functions it relies on (GetStorageImageFormat, IsCompatibleViewFormat) already existed.
83 lines
3.1 KiB
C#
83 lines
3.1 KiB
C#
// Copyright (C) 2026 SharpEmu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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using SharpEmu.Libs.VideoOut;
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using Silk.NET.Vulkan;
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using Xunit;
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namespace SharpEmu.Libs.Tests.VideoOut;
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public sealed class VulkanGuestImageAliasTests
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{
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[Theory]
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[InlineData(Format.R8G8B8A8Srgb, Format.R8G8B8A8Unorm)]
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[InlineData(Format.R8G8B8A8Unorm, Format.R8G8B8A8Srgb)]
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public void SrgbAndUnormCounterpartsShareOneGuestImage(
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Format existing,
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Format requested)
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{
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Assert.True(
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VulkanVideoPresenter.IsAliasableGuestImageFormat(existing, requested));
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}
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[Theory]
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[InlineData(Format.R8G8B8A8Unorm)]
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[InlineData(Format.R8G8B8A8Srgb)]
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[InlineData(Format.R16G16B16A16Sfloat)]
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public void IdenticalFormatsUseTheExactMatchPath(Format format)
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{
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// Equal formats are accepted by the exact-match condition; the alias
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// helper only reports genuinely different identities.
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Assert.False(
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VulkanVideoPresenter.IsAliasableGuestImageFormat(format, format));
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}
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[Theory]
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[InlineData(Format.R32Uint, Format.R8G8B8A8Unorm)]
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[InlineData(Format.R32Sint, Format.R8G8B8A8Unorm)]
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[InlineData(Format.R32Sfloat, Format.R8G8B8A8Unorm)]
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[InlineData(Format.R16G16Sfloat, Format.R8G8B8A8Unorm)]
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[InlineData(Format.A2B10G10R10UnormPack32, Format.R8G8B8A8Unorm)]
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[InlineData(Format.B10G11R11UfloatPack32, Format.R8G8B8A8Srgb)]
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public void SameClassNumericReinterpretationKeepsRecreatePath(
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Format existing,
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Format requested)
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{
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// These pairs are legal Vulkan view aliases (same 32-bit class), but
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// accepting them would attach fragment shaders translated for the
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// other numeric encoding to the existing attachment format.
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Assert.True(
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VulkanVideoPresenter.IsCompatibleGuestImageViewFormat(existing, requested));
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Assert.False(
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VulkanVideoPresenter.IsAliasableGuestImageFormat(existing, requested));
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}
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[Theory]
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[InlineData(Format.R8Srgb, Format.R8Unorm)]
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[InlineData(Format.BC3SrgbBlock, Format.BC3UnormBlock)]
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public void CounterpartsOutsideTheViewClassTableAreNotAliased(
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Format existing,
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Format requested)
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{
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// sRGB/UNORM counterparts that the view-compatibility table cannot
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// alias must keep the recreate path: the shared image could never
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// legally serve the second identity through an alias view.
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Assert.False(
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VulkanVideoPresenter.IsCompatibleGuestImageViewFormat(existing, requested));
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Assert.False(
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VulkanVideoPresenter.IsAliasableGuestImageFormat(existing, requested));
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}
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[Fact]
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public void AliasedPairStaysWithinOneCompatibilityClass()
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{
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// The alias accept creates identity views of both formats on one
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// mutable-format image; this guards the compatibility table entries
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// the accept relies on.
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Assert.True(
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VulkanVideoPresenter.IsCompatibleGuestImageViewFormat(
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Format.R8G8B8A8Srgb,
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Format.R8G8B8A8Unorm));
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}
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}
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