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64 lines
2.7 KiB
C++
64 lines
2.7 KiB
C++
/* Python-rgbcx Texture Compression Library
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Copyright (C) 2021 Andrew Cassidy <drewcassidy@me.com>
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Partially derived from rgbcx.h written by Richard Geldreich <richgel99@gmail.com>
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and licenced under the public domain
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../BlockEncoder.h"
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#include <pybind11/pybind11.h>
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#include <stdexcept>
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#include "../bitwiseEnums.h"
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#define STRINGIFY(x) #x
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#define MACRO_STRINGIFY(x) STRINGIFY(x)
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namespace py = pybind11;
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namespace rgbcx::bindings {
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py::bytes EncodeImage(const BlockEncoder &self, py::bytes decoded, unsigned image_width, unsigned image_height) {
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if (image_width % self.BlockWidth() != 0) throw std::invalid_argument("Width is not an even multiple of block_width");
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if (image_height % self.BlockHeight() != 0) throw std::invalid_argument("Height is not an even multiple of block_height");
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if (image_width == 0 || image_height == 0) throw std::invalid_argument("Image has zero size");
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size_t size = image_width * image_height;
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size_t block_size = (size / (self.BlockHeight() * self.BlockWidth())) * self.BlockSize();
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size_t color_size = size * sizeof(Color);
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std::string encoded_str = std::string(block_size, 0);
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std::string decoded_str = (std::string)decoded; // decoded data is copied here, unfortunately
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if (decoded_str.size() != color_size) throw std::invalid_argument("Incompatible data: image width and height do not match the size of the decoded image");
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self.EncodeImage(reinterpret_cast<uint8_t *>(encoded_str.data()), reinterpret_cast<Color *>(decoded_str.data()), image_width, image_height);
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auto bytes = py::bytes(encoded_str); // encoded data is copied here, unfortunately
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return bytes;
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}
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void InitBlockEncoder(py::module_ &m) {
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py::class_<BlockEncoder> block_encoder(m, "BlockEncoder");
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block_encoder.def("encode_image", &EncodeImage);
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block_encoder.def_property_readonly("block_size", &BlockEncoder::BlockSize);
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block_encoder.def_property_readonly("block_width", &BlockEncoder::BlockWidth);
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block_encoder.def_property_readonly("block_height", &BlockEncoder::BlockHeight);
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}
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} // namespace rgbcx::bindings
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