bool PlaneDistortWarpImageOperation::determineDependingAreaOfInterest(
rcti *input, ReadBufferOperation *readOperation, rcti *output)
{
float min[2], max[2];
INIT_MINMAX2(min, max);
for (int sample = 0; sample < this->m_motion_blur_samples; ++sample) {
float UVs[4][2];
float deriv[2][2];
MotionSample *sample_data = &this->m_samples[sample];
/* TODO(sergey): figure out proper way to do this. */
warpCoord(input->xmin - 2, input->ymin - 2, sample_data->perspectiveMatrix, UVs[0], deriv);
warpCoord(input->xmax + 2, input->ymin - 2, sample_data->perspectiveMatrix, UVs[1], deriv);
warpCoord(input->xmax + 2, input->ymax + 2, sample_data->perspectiveMatrix, UVs[2], deriv);
warpCoord(input->xmin - 2, input->ymax + 2, sample_data->perspectiveMatrix, UVs[3], deriv);
for (int i = 0; i < 4; i++) {
minmax_v2v2_v2(min, max, UVs[i]);
}
}
rcti newInput;
newInput.xmin = min[0] - 1;
newInput.ymin = min[1] - 1;
newInput.xmax = max[0] + 1;
newInput.ymax = max[1] + 1;
return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}
void PlaneDistortWarpImageOperation::executePixelSampled(float output[4],
float x,
float y,
PixelSampler /*sampler*/)
{
float uv[2];
float deriv[2][2];
if (this->m_motion_blur_samples == 1) {
warpCoord(x, y, this->m_samples[0].perspectiveMatrix, uv, deriv);
m_pixelReader->readFiltered(output, uv[0], uv[1], deriv[0], deriv[1]);
}
else {
zero_v4(output);
for (int sample = 0; sample < this->m_motion_blur_samples; ++sample) {
float color[4];
warpCoord(x, y, this->m_samples[sample].perspectiveMatrix, uv, deriv);
m_pixelReader->readFiltered(color, uv[0], uv[1], deriv[0], deriv[1]);
add_v4_v4(output, color);
}
mul_v4_fl(output, 1.0f / (float)this->m_motion_blur_samples);
}
}
void PlaneDistortWarpImageOperation::pixelTransform(const float xy[2], float r_uv[2], float r_deriv[2][2])
{
warpCoord(xy[0], xy[1], m_perspectiveMatrix, r_uv, r_deriv);
}
