Function imageWriteExr

3rdparty/bimg/src/image.cpp:5546–5681

	}

	int32_t imageWriteExr(bx::WriterI* _writer, uint32_t _width, uint32_t _height, uint32_t _srcPitch, const void* _src, TextureFormat::Enum _format, bool _yflip, bx::Error* _err)
	{
		BX_ERROR_SCOPE(_err);

		const uint32_t bpp = getBitsPerPixel(_format);
		uint32_t bytesPerChannel = 0;

		switch (_format)
		{
		case TextureFormat::RGBA16F:
			bytesPerChannel = 2;
			break;

		default:
			BX_ERROR_SET(_err, BIMG_ERROR, "EXR: Unsupported texture format.");
			return 0;
		}

		int32_t total = 0;
		total += bx::write(_writer, "v/1\x01", _err);
		total += bx::writeLE(_writer, uint32_t(2), _err);

		total += bx::write(_writer, "channels", _err);
		total += bx::write(_writer, '\0', _err);
		total += bx::write(_writer, "chlist", _err);
		total += bx::write(_writer, '\0', _err);
		total += bx::writeLE(_writer, uint32_t(18*4+1), _err);

		const uint8_t cdata[] = { 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0 };
		// Order is always ABGR order because Photoshop and GIMP ignore these fields and
		// assume it's in ABGR order.
		total += bx::write(_writer, 'A', _err);
		total += bx::write(_writer, cdata, BX_COUNTOF(cdata), _err);
		total += bx::write(_writer, 'B', _err);
		total += bx::write(_writer, cdata, BX_COUNTOF(cdata), _err);
		total += bx::write(_writer, 'G', _err);
		total += bx::write(_writer, cdata, BX_COUNTOF(cdata), _err);
		total += bx::write(_writer, 'R', _err);
		total += bx::write(_writer, cdata, BX_COUNTOF(cdata), _err);
		total += bx::write(_writer, '\0', _err);

		total += bx::write(_writer, "compression", _err);
		total += bx::write(_writer, '\0', _err);
		total += bx::write(_writer, "compression", _err);
		total += bx::write(_writer, '\0', _err);
		total += bx::writeLE(_writer, uint32_t(1), _err);
		total += bx::write(_writer, '\0', _err); // no compression

		total += bx::write(_writer, "dataWindow", _err);
		total += bx::write(_writer, '\0', _err);
		total += bx::write(_writer, "box2i", _err);
		total += bx::write(_writer, '\0', _err);
		total += bx::writeLE(_writer, uint32_t(16), _err);
		total += bx::writeRep(_writer, '\0', 8, _err);
		total += bx::writeLE(_writer, _width-1,  _err);
		total += bx::writeLE(_writer, _height-1, _err);

		total += bx::write(_writer, "displayWindow", _err);