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If you have not done so, read this full tutorial on how to use SGEXTN to build an application.
SGRImage::SGRImage(int w, int h, SGXColourRGBA c);
SGRImage::SGRImage(const SGXString& filePath);
SGRImage::SGRImage(int w, int h);
[[nodiscard]] SGXColourRGBA SGRImage::colourAt(int x, int y) const;
[[nodiscard]] int SGRImage::height() const;
[[nodiscard]] SGXColourRGBA SGRImage::interpolatedColourAt(float x, float y) const;
void SGRImage::saveToFile(const SGXString& filePath) const;
void SGRImage::setColourAt(int x, int y, SGXColourRGBA c) const;
[[nodiscard]] int SGRImage::width() const;
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