h4570
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/*
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# ______ ____ ___
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# | \/ ____| |___|
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# | | | \ | |
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#-----------------------------------------------------------------------
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# Copyright 2020, tyra - https://github.com/h4570/tyra
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# Licenced under Apache License 2.0
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# Sandro Sobczyński <sandro.sobczynski@gmail.com>
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*/
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#include "../include/loaders/bmp_loader.hpp"
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#include "../include/utils/debug.hpp"
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#include "../include/utils/string.hpp"
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#include <cstdlib>
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// ----
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// Constructors/Destructors
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// ----
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BmpLoader::BmpLoader() {}
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BmpLoader::~BmpLoader() {}
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// ----
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// Methods
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// ----
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/**
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* @param t_name Without extension. Example "skyfall2"
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* @param t_extension With dot and extension. Example ".BMP"
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*/
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void BmpLoader::load(Texture &o_texture, char *t_subfolder, char *t_name, char *t_extension)
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{
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char *path_part1 = String::createConcatenated(t_subfolder, t_name);
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char *path_part2 = String::createConcatenated("host:", path_part1);
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char *path = String::createConcatenated(path_part2, t_extension);
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delete[] path_part1;
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delete[] path_part2;
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FILE *file = fopen(path, "rb");
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assertMsg(file != NULL, "Failed to load .bmp file!");
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unsigned char header[54];
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fread(header, sizeof(unsigned char), 54, file);
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u32 width = (u32)header[18];
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u32 height = (u32)header[22];
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u32 bits = (u32)header[28];
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u32 dataOffset = (u32)header[10];
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assertMsg(bits == 24, "Invalid bits per pixel in .bmp file - expected 24!");
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o_texture.setSize(width, height, TEX_TYPE_RGB);
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printf("BMPLoader - width: %d | height: %d | bits: %d\n", width, height, bits);
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u64 rowPadded = (width * 3 + 3) & (~3);
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unsigned char row[rowPadded];
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//Offset file stream to raster data
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fseek(file, dataOffset, SEEK_SET);
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u32 x = 0;
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for (u32 i = 0; i < height; i++)
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{
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fread(&row, sizeof(unsigned char), rowPadded, file);
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for (u32 j = 0; j < width * 3; j += 3)
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{
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// Convert (B, G, R) to (R, G, B)
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o_texture.setData(x, row[j + 2]);
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o_texture.setData(x + 1, row[j + 1]);
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o_texture.setData(x + 2, row[j]);
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x += 3;
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}
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}
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delete[] path;
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fclose(file);
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}
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