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graphics: share packed texture and render-target channel layouts

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Resolve PS5 5551 textures with alpha in bit 15 and compose host channel order with guest selectors. Share the existing render-target mapping with sampled textures so packed layouts cannot diverge.

Add native GPU readback coverage for 5551 and 4444, arbitrary selectors, constants, and existing 1555 render-target mapping. Verified PPSA24515 through launch.json with Vulkan validation, advancing scenes and over 12,700 guest flips. Independent correctness and cleanliness audits passed.
This commit is contained in:
nmzik
2026-09-10 13:45:08 +04:00
parent 635fb8882b
commit a305a6c1c6
5 changed files with 181 additions and 38 deletions
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src/graphics/host_gpu/vulkanCommon.cpp
+2 -1
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@@ -78,7 +78,8 @@ constexpr FormatMapping kFormatMappings[] = {
{Prospero::BufferFormat::k8_8_8_8Srgb, vk::Format::eR8G8B8A8Srgb},
{Prospero::BufferFormat::k9_9_9_5Float, vk::Format::eE5B9G9R9UfloatPack32},
{Prospero::BufferFormat::k5_6_5UNorm, vk::Format::eB5G6R5UnormPack16},
{Prospero::BufferFormat::k5_5_5_1UNorm, vk::Format::eR5G5B5A1UnormPack16},
{Prospero::BufferFormat::k5_5_5_1UNorm, vk::Format::eA1R5G5B5UnormPack16},
{Prospero::BufferFormat::k1_5_5_5UNorm, vk::Format::eR5G5B5A1UnormPack16},
{Prospero::BufferFormat::k4_4_4_4UNorm, vk::Format::eR4G4B4A4UnormPack16},
{Prospero::BufferFormat::kBc1UNorm, vk::Format::eBc1RgbaUnormBlock},
{Prospero::BufferFormat::kBc1Srgb, vk::Format::eBc1RgbaSrgbBlock},