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https://github.com/Kbz-8/42_vox.git
synced 2026-01-11 14:43:34 +00:00
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#include <Graphics/Loaders/BMP.h>
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#include <Maths/Vec3.h>
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#include <fstream>
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namespace Scop
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{
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CPUBuffer LoadBMPFile(const std::filesystem::path& path, Vec2ui32& dimensions)
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{
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if(path.extension() != ".bmp")
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{
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Error("BMP loader: not a BMP file, %", path);
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return {};
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}
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std::ifstream file(path, std::ios::binary);
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if(!file.is_open())
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{
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Error("BMP loader: could not open %", path);
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return {};
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}
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std::int16_t bpp;
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file.seekg(18, std::ios_base::beg);
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file.read(reinterpret_cast<char*>(&dimensions.x), sizeof(dimensions.x));
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file.read(reinterpret_cast<char*>(&dimensions.y), sizeof(dimensions.y));
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file.seekg(28, std::ios_base::beg);
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file.read(reinterpret_cast<char*>(&bpp), sizeof(bpp));
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file.seekg(54, std::ios_base::beg);
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if(bpp != 24)
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Warning("BMP loader: warning while loading %, cannot handle yet different color palette sizes", path);
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CPUBuffer buffer{ dimensions.x * dimensions.y * 4 };
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for(std::size_t i = 0; i < buffer.GetSize(); i += 4)
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{
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Vec3b data{ 0, 0, 0 };
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data.x = (file.eof() ? 0x00 : file.get());
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data.y = (file.eof() ? 0x00 : file.get());
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data.z = (file.eof() ? 0x00 : file.get());
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buffer.GetData()[i + 0] = data.z;
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buffer.GetData()[i + 1] = data.y;
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buffer.GetData()[i + 2] = data.x;
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buffer.GetData()[i + 3] = 0xFF;
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}
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Message("BMP Loader: loaded %", path);
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return buffer;
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}
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}
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