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Use more colorscience from millipixels

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This commit is contained in:
Martijn Braam
2023-07-25 13:28:42 +02:00
parent e9681e1eea
commit 7941becb17
2 changed files with 38 additions and 6 deletions
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29
src/matrix.h
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@@ -1 +1,30 @@
static float xyz_to_srgb[] = { 3.2404542f, -1.5371385f, -0.4985314f,
-0.9692660f, 1.8760108f, 0.0415560f,
0.0556434f, -0.2040259f, 1.0572252f };
void multiply_matrices(float a[9], float b[9], float out[9]);
void
invert_matrix(const float in[9], float out[9])
{
float det = in[0] * (in[4] * in[8] - in[5] * in[7]) -
in[1] * (in[3] * in[8] - in[5] * in[6]) +
in[2] * (in[3] * in[7] - in[4] * in[7]);
out[0] = (in[4] * in[8] - in[7] * in[5]) / det;
out[1] = (in[7] * in[2] - in[1] * in[8]) / det;
out[2] = (in[1] * in[5] - in[4] * in[2]) / det;
out[3] = (in[6] * in[5] - in[3] * in[8]) / det;
out[4] = (in[0] * in[8] - in[6] * in[5]) / det;
out[5] = (in[3] * in[2] - in[0] * in[5]) / det;
out[6] = (in[3] * in[7] - in[6] * in[4]) / det;
out[7] = (in[6] * in[1] - in[0] * in[7]) / det;
out[8] = (in[0] * in[4] - in[3] * in[1]) / det;
}
void
transpose_matrix(const float in[9], float out[9])
{
for (int i = 0; i < 3; ++i)
for (int j = 0; j < 3; ++j)
out[i + j * 3] = in[j + i * 3];
}