BlackMark
24d66020f6
The host sampled the shared backbuffer copy through a view typed exactly like the game's backbuffer. For games whose backbuffer is an *_SRGB format (e.g. Life is Strange: Before the Storm -- confirmed R8G8B8A8_UNORM_SRGB / fmt 29 via the hook log), the GPU decoded sRGB->linear on the sample, and the host then wrote those linear values straight to its plain-UNORM swapchain with no re-encode, so the mirror came out noticeably darker than the game. Sample the copy as the plain-UNORM sibling of the format (srgb_to_unorm) so the bytes pass through unchanged -- matching what WGC already does. The UNORM and *_SRGB formats share a typeless group, so CopyResource from the producer's sRGB texture into the host's UNORM copy is allowed. Non-sRGB formats are unaffected. Adds srgb_format_test locking the mapping. All 6 tests pass. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
42 lines
1.6 KiB
C++
42 lines
1.6 KiB
C++
// Unit test for srgb_to_unorm (host/src/capture/dxgi_format.hpp): the hooked
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// video path samples the shared backbuffer copy as plain UNORM so an *_SRGB game
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// backbuffer isn't darkened by an sRGB->linear decode the host never re-encodes.
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// Locks the format mapping that fix depends on. No device needed.
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#include <cstdio>
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#include "capture/dxgi_format.hpp"
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using namespace coop;
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namespace
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{
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int g_failures = 0;
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void expect(DXGI_FORMAT in, DXGI_FORMAT want, const char* what)
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{
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const DXGI_FORMAT got = srgb_to_unorm(in);
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if (got != want)
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{
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std::printf(" FAIL: %s (got %d, want %d)\n", what, static_cast<int>(got), static_cast<int>(want));
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++g_failures;
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}
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}
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} // namespace
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int main()
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{
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// sRGB formats map to their plain-UNORM sibling.
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expect(DXGI_FORMAT_R8G8B8A8_UNORM_SRGB, DXGI_FORMAT_R8G8B8A8_UNORM, "R8G8B8A8 sRGB -> UNORM");
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expect(DXGI_FORMAT_B8G8R8A8_UNORM_SRGB, DXGI_FORMAT_B8G8R8A8_UNORM, "B8G8R8A8 sRGB -> UNORM");
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expect(DXGI_FORMAT_B8G8R8X8_UNORM_SRGB, DXGI_FORMAT_B8G8R8X8_UNORM, "B8G8R8X8 sRGB -> UNORM");
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// Non-sRGB formats pass through unchanged.
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expect(DXGI_FORMAT_R8G8B8A8_UNORM, DXGI_FORMAT_R8G8B8A8_UNORM, "R8G8B8A8 UNORM passthrough");
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expect(DXGI_FORMAT_B8G8R8A8_UNORM, DXGI_FORMAT_B8G8R8A8_UNORM, "B8G8R8A8 UNORM passthrough");
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expect(DXGI_FORMAT_R10G10B10A2_UNORM, DXGI_FORMAT_R10G10B10A2_UNORM, "R10G10B10A2 passthrough");
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expect(DXGI_FORMAT_R16G16B16A16_FLOAT, DXGI_FORMAT_R16G16B16A16_FLOAT, "RGBA16F passthrough");
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std::printf(g_failures == 0 ? "SRGB FORMAT TEST PASS\n" : "SRGB FORMAT TEST FAILED (%d)\n", g_failures);
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return g_failures == 0 ? 0 : 1;
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}
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