🛠️🐜 Antkeeper superbuild with dependencies included
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79 lines
1.9 KiB
79 lines
1.9 KiB
#include <vector>
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#include <emscripten/bind.h>
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#define TINYEXR_IMPLEMENTATION
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#include "tinyexr.h"
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using namespace emscripten;
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///
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/// Simple C++ wrapper class for Emscripten
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///
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class EXRLoader {
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public:
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///
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/// `binary` is the buffer for EXR binary(e.g. buffer read by fs.readFileSync)
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/// std::string can be used as UInt8Array in JS layer.
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///
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EXRLoader(const std::string &binary) {
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const float *ptr = reinterpret_cast<const float *>(binary.data());
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float *rgba = nullptr;
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width_ = -1;
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height_ = -1;
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const char *err = nullptr;
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error_.clear();
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result_ = LoadEXRFromMemory(
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&rgba, &width_, &height_,
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reinterpret_cast<const unsigned char *>(binary.data()), binary.size(),
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&err);
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if (TINYEXR_SUCCESS == result_) {
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image_.resize(size_t(width_ * height_ * 4));
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memcpy(image_.data(), rgba, sizeof(float) * size_t(width_ * height_ * 4));
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free(rgba);
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} else {
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if (err) {
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error_ = std::string(err);
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}
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}
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}
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~EXRLoader() {}
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// Return as memory views
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emscripten::val getBytes() const {
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return emscripten::val(
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emscripten::typed_memory_view(image_.size(), image_.data()));
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}
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bool ok() const { return (TINYEXR_SUCCESS == result_); }
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const std::string error() const { return error_; }
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int width() const { return width_; }
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int height() const { return height_; }
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private:
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std::vector<float> image_; // RGBA
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int width_;
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int height_;
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int result_;
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std::string error_;
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};
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// Register STL
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EMSCRIPTEN_BINDINGS(stl_wrappters) { register_vector<float>("VectorFloat"); }
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EMSCRIPTEN_BINDINGS(tinyexr_module) {
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class_<EXRLoader>("EXRLoader")
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.constructor<const std::string &>()
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.function("getBytes", &EXRLoader::getBytes)
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.function("ok", &EXRLoader::ok)
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.function("error", &EXRLoader::error)
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.function("width", &EXRLoader::width)
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.function("height", &EXRLoader::height);
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}
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