57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
#include "image.hpp"
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#include <stdexcept>
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#pragma warning(push)
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#pragma warning(disable: 4100)
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#define STBI_ONLY_JPEG
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#define STB_IMAGE_IMPLEMENTATION
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#include <stb_image.h>
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#pragma warning(pop)
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#include "finally.hpp"
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namespace utilities::image
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{
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image load_image(const std::string& data)
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{
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stbi_uc* buffer{};
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const auto _ = finally([&]
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{
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if (buffer)
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{
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stbi_image_free(buffer);
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}
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});
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constexpr int channels = 4;
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int x, y, channels_in_file;
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buffer = stbi_load_from_memory(reinterpret_cast<const uint8_t*>(data.data()),
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static_cast<int>(data.size()), &x, &y, &channels_in_file, channels);
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if (!buffer)
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{
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throw std::runtime_error("Failed to load image");
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}
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image res{};
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res.width = static_cast<size_t>(x);
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res.height = static_cast<size_t>(y);
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res.data.assign(reinterpret_cast<const char*>(buffer), res.width * res.height * channels);
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return res;
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}
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object create_bitmap(const image& img)
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{
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auto copy = img.data;
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for (size_t i = 0; i < (img.width * img.height); ++i)
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{
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auto& r = copy[i * 4 + 0];
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auto& b = copy[i * 4 + 2];
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std::swap(r, b);
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}
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return CreateBitmap(static_cast<int>(img.width), static_cast<int>(img.height), 4, 8, copy.data());
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}
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}
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