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[idd] postprocess: centralize color transform state

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This commit is contained in:
Geoffrey McRae
2026-08-13 20:44:31 +10:00
parent 3d7df86a01
commit 84bda112ac
6 changed files with 63 additions and 58 deletions
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40
idd/LGIdd/postprocess/CPostProcessor.cpp
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@@ -30,46 +30,6 @@
#include <limits>
#include <utility>
namespace
{
bool NearlyEqual(float a, float b, float tolerance)
{
const float delta = a - b;
return delta >= -tolerance && delta <= tolerance;
}
}
bool IsIdentityColorTransform(const D12ColorTransform& transform)
{
static const float matrixTolerance = 1.0f / 1048576.0f;
static const float lutTolerance = 1.0f / 65535.0f;
if (transform.matrixEnabled)
{
for (unsigned row = 0; row < 3; ++row)
for (unsigned column = 0; column < 4; ++column)
{
const float expected = row == column ? 1.0f : 0.0f;
const float effective =
transform.matrix[row][column] * transform.scalar;
if (!NearlyEqual(effective, expected, matrixTolerance))
return false;
}
}
if (transform.lutEnabled)
for (unsigned i = 0; i < 4096; ++i)
{
const float expected = (float)i / 4095.0f;
if (!NearlyEqual(transform.lut[i][0], expected, lutTolerance) ||
!NearlyEqual(transform.lut[i][1], expected, lutTolerance) ||
!NearlyEqual(transform.lut[i][2], expected, lutTolerance))
return false;
}
return true;
}
bool CPostProcessor::Init(std::shared_ptr<CD3D12Device> dx12Device,
bool enableEffects)
{