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Update osltoyrenderer.cpp: auto-detect output variable -- doesn't need to be Cout if there's only on #1880

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Update osltoyrenderer.cpp: auto-detect output variable -- doesn't need to be Cout if there's only on #1880

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23 changes: 21 additions & 2 deletions src/osltoy/osltoyrenderer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -129,15 +129,34 @@ OSLToyRenderer::render_image()
m_framebuffer.reset(
OIIO::ImageSpec(m_xres, m_yres, 3, TypeDesc::FLOAT));

static ustring outputs[] = { ustring("Cout") };
std::vector<ustring> output_vars;

// Get the list of output variables from the shader group
shadingsys()->getattribute(shadergroup(), "renderer_outputs", output_vars);

// If no output variables are found, default to Cout
if (output_vars.empty()) {
output_vars.push_back(ustring("Cout"));
}

// If there's only one output variable, automatically use it
const ustring* outputs = &output_vars[0];
if (output_vars.size() == 1) {
outputs = &output_vars[0]; // auto-detect and use the single output
} else {
// If there are multiple outputs, you could implement additional logic here
// to choose between them or provide the user with a choice.
outputs = &output_vars[0]; // default to the first output
}
Comment on lines +143 to +150
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I don't understand what's going on here. You set outputs to point to the first element of output_vars. OK. Then if that's the only item in output_vars, you... do it again? But if there are multiple items in output_vars, you... also do the same thing?


OIIO::paropt popt(0, OIIO::paropt::SplitDir::Tile, 4096);
shade_image(*shadingsys(), *shadergroup(), &m_shaderglobals_template,
m_framebuffer, outputs, ShadePixelCenters, OIIO::ROI(), popt);
// std::cout << timer() << "\n";
}




int
OSLToyRenderer::supports(string_view /*feature*/) const
{
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