69 lines
1.5 KiB
C++
69 lines
1.5 KiB
C++
#include "Bitmap.hpp"
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#include <fstream>
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#include <iostream>
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Bitmap::Bitmap() {
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offset = 0;
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width = 0;
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height = 0;
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bpp = 0;
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}
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Bitmap::Bitmap(const std::string &file) {
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offset = 0;
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width = 0;
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height = 0;
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bpp = 0;
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load(file);
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}
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void Bitmap::load(const std::string &file) {
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std::ifstream stream;
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stream.open(file);
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if(stream.is_open()){
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std::string str((std::istreambuf_iterator<char>(stream)),std::istreambuf_iterator<char>());
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data.resize(str.size());
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for(int i = 0; i < str.size();i++){
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data[i] = str[i];
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}
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offset = *reinterpret_cast<int*>(&data[10]);
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width = *reinterpret_cast<int*>(&data[18]);
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height = *reinterpret_cast<int*>(&data[22]);
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bpp = *reinterpret_cast<uint16_t *>(&data[28]);
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}
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}
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int Bitmap::getWidth() {
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return width;
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}
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int Bitmap::getHeight() {
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return height;
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}
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char *Bitmap::getData() {
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return &data[offset];
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}
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int Bitmap::getBitsPerPixel() {
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return bpp;
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}
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unsigned int Bitmap::getPixel(int x, int y) {
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unsigned int pixel = 0;
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if(bpp == 1){
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int index = (getHeight() - 1 - y) * getWidth() + x;
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char *ptr = getData() + (index / 8);
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bool value = (ptr[0] >> (7 - (index % 8))) & 1u;
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return (int)value;
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}
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char *ptr = getData() + ((getHeight() - 1 - y) * getWidth() + x) * (getBitsPerPixel() / 8);
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for(int i = 0; i < getBitsPerPixel() / 8;i++){
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auto value = reinterpret_cast<char*>(&pixel)+i;
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*value = ptr[i];
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}
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return pixel;
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}
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