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Palette interpolation on device

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Steven Robertson
2011-10-25 22:56:19 -04:00
parent e793527c29
commit 376cd752d6
4 changed files with 102 additions and 16 deletions
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27
cuburn/code/interp.py
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@ -313,6 +313,33 @@ void test_cr(const float *times, const float *knots, const float *t, float *r) {
r[i] = catmull_rom(times, knots, t[i]);
}
__global__
void interp_palette_hsv(uchar4 *outs, const float *times, const float4 *sources,
float tstart, float tstep) {
float time = tstart + blockIdx.x * tstep;
int idx = fmaxf(bitwise_binsearch(times, time), 1);
float4 left = sources[blockDim.x * (idx - 1) + threadIdx.x];
float4 right = sources[blockDim.x * (idx) + threadIdx.x];
float lf = (times[idx] - time) / (times[idx] - times[idx-1]);
float rf = 1.0f - lf;
float3 lhsv = rgb2hsv(make_float3(left.x, left.y, left.z));
float3 rhsv = rgb2hsv(make_float3(right.x, right.y, right.z));
float3 hsv;
hsv.x = lhsv.x * lf + rhsv.x * rf;
hsv.y = lhsv.y * lf + rhsv.y * rf;
hsv.z = lhsv.z * lf + rhsv.z * rf;
float3 rgb = hsv2rgb(hsv);
uchar4 out;
out.x = rgb.x * 255.0f;
out.y = rgb.y * 255.0f;
out.z = rgb.z * 255.0f;
out.w = 255.0f * (left.z * lf + right.z * rf);
outs[blockDim.x * blockIdx.x + threadIdx.x] = out;
}
""")