285 lines
9.1 KiB
C++
285 lines
9.1 KiB
C++
#include <iostream>
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#include <fstream>
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#include <windows.h>
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#include <stdio.h>
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#include <string>
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#include <math.h>
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#include <algorithm>
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using namespace std;
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typedef unsigned char uch;
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void error(int x){
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switch (x)
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{
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case 1:
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fprintf(stderr, "Usage: ./transform.exe infile outfile width*height!\n");
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break;
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case 2:
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fprintf(stderr, "Format of infile is wrong, pleace check it and try again!\n");
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break;
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case 3:
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fprintf(stderr, "Format of outfile is wrong, pleace check it and try again!\n");
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break;
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case 4:
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fprintf(stderr, "Please use width*height or angle format at the end!\n");
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break;
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default:
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break;
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}
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}
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bool isNumber(const string& str)
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{
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return !str.empty() &&
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std::find_if(str.begin(), str.end(),
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[](unsigned char c) { return !std::isdigit(c); }) == str.end();
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}
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char* input_file = new char[100];
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char* output_file = new char[100];
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uint32_t old_width, old_height, bit;
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uint32_t new_width, new_height;
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int situation = 0;
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int angle = 0;
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int main(int argc, char* argv[]){
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BITMAPFILEHEADER old_head;
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BITMAPINFOHEADER old_info;
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ifstream infile;
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if(argc != 4){
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error(1);
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return 0;
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}
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else{
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input_file = argv[1];
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output_file = argv[2];
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string funtion = argv[3];
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string special_symbol = "*";
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string special_words = ".bmp";
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string::size_type check_in, check_out, func;
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check_in = ((string)input_file).find(special_words);
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check_out = ((string)output_file).find(special_words);
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func = funtion.find(special_symbol);
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infile.open(input_file, ios::in | ios::binary);
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infile.read((char*)&old_head, sizeof(BITMAPFILEHEADER));
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infile.read((char*)&old_info, sizeof(BITMAPINFOHEADER));
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uint32_t old_width = old_info.biWidth;
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uint32_t old_height = old_info.biHeight;
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uint16_t bit = old_info.biBitCount;
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if(check_in == string::npos){//²»´æ??
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error(2);
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return 0;
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}
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else if(check_out == string::npos){//²»´æ??
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error(3);
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return 0;
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}
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if(func == string::npos){//²»´æÔÚ£¬ÓпÉÄÜÊÇÐýÞD
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if(isNumber(funtion)){
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new_width = old_width;
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new_height = old_height;
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angle = stoi(funtion);
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if(angle == 90){
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situation = 1;
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new_width = old_height;
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new_height = old_width;
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}
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else if(angle == 180){
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situation = 2;
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new_width = old_width;
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new_height = old_height;
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}
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else if(angle == 270){
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situation = 3;
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new_width = old_height;
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new_height = old_width;
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}
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else{error(4);return 0;}
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}
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else{error(4);return 0;}
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}
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else{
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situation = 0;
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int current = 0;
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int pos = funtion.find_first_of(special_symbol, current);
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new_width = atoi((funtion.substr(0, funtion.find(special_symbol))).c_str());
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new_height = atoi((funtion.substr(funtion.find(special_symbol) + 1, funtion.length())).c_str());
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}
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}
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cout << situation << endl;
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if(old_head.bfType != 0x4d42){
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cout << "error" << endl;
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infile.close();
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return 0;
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}
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unsigned char raw[old_height][old_width][3] = {};
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// cout << old_info. << endl;
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int padding = (4 - (old_width * 3) % 4) % 4;
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for(int y = old_height-1; y >= 0; --y) {
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for(int x = 0; x < old_width; ++x) {
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if(bit == 24) {
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unsigned char colour[3];
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infile.read((char*)raw[y][x], 3);
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}
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}
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infile.ignore(padding);
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}
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infile.close();
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//--------------éL¡¢Œ’??-----------------
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// float radio_w, radio_h;
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// printf("±¶”µ(w)??");
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// cin >> radio_w;
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// printf("±¶”µ(h)??");
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// cin >> radio_h;
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// uint32_t new_width = (uint32_t)floor(radio_w*old_width);
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// uint32_t new_height = (uint32_t)floor(radio_h*old_height);
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//--------------Ìض¨éL¡¢Œ’-----------------
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// uint32_t new_width, new_height;
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// printf("±¶”µ(w)??");
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// scanf("%d", &new_width);
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// printf("±¶”µ(h)??");
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// scanf("%d", &new_height);
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float radio_w = (float)new_width/old_width;
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float radio_h = (float)new_height/old_height;
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ofstream outfile;
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outfile.open(output_file, ios::out | ios::binary);
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BITMAPFILEHEADER new_head;
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BITMAPINFOHEADER new_info;
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new_head.bfType = 0x4d42;
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new_head.bfReserved1 = 0;
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new_head.bfReserved2 = 0;
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new_head.bfOffBits = 54;
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new_head.bfSize = new_head.bfOffBits + new_width*new_height * bit/8;
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if(bit==8){new_head.bfSize += 1024, new_head.bfOffBits += 1024;}
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new_info.biSize = 40;
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new_info.biPlanes = 1;
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new_info.biCompression = 0;
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new_info.biXPelsPerMeter = 0;
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new_info.biYPelsPerMeter = 0;
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new_info.biClrUsed = 0;
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new_info.biClrImportant = 0;
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new_info.biWidth = new_width;
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new_info.biHeight = new_height;
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new_info.biBitCount = bit;
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new_info.biSizeImage = new_width*new_height*bit/8;
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outfile.write((char*)&new_head, sizeof(new_head));
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outfile.write((char*)&new_info, sizeof(new_info));
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// cout << "\nnew_width : " << new_width << endl;
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// cout << "new_height : " << new_height << endl;
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padding = (4 - (new_width * 3) % 4) % 4;
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unsigned char bmpPad[3] = {0, 0, 0};
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switch (situation)
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{
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case 0:
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//---------------------------resize-------------------------
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for(int y = new_height-1; y >= 0; --y){
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for(int x = 0; x < new_width; ++x){
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if(bit == 24) {
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unsigned char b = raw[(int)(y/radio_h)][(int)(x/radio_w)][2];
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unsigned char g = raw[(int)(y/radio_h)][(int)(x/radio_w)][1];
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unsigned char r = raw[(int)(y/radio_h)][(int)(x/radio_w)][0];
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unsigned char color[] = {r, g, b};
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outfile.write((char*)color, 3);
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}
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// else if(bit == 8){
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// outfile.write((char*)&raw[i][j], sizeof(char*));
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// }
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}
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outfile.write((char*)bmpPad, padding);
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}
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break;
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case 1:
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//---------------------------turn 90-------------------------
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for(int x = 0; x < new_width; ++x){
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for(int y = 0; y < new_height; ++y){
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if(bit == 24) {
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unsigned char b = raw[(int)(y/radio_h)][(int)(x/radio_w)][2];
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unsigned char g = raw[(int)(y/radio_h)][(int)(x/radio_w)][1];
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unsigned char r = raw[(int)(y/radio_h)][(int)(x/radio_w)][0];
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unsigned char color[] = {r, g, b};
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outfile.write((char*)color, 3);
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}
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// else if(bit == 8){
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// outfile.write((char*)&raw[i][j], sizeof(char*));
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// }
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}
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outfile.write((char*)bmpPad, padding);
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}
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outfile.close();
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return 0;
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break;
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case 2:
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//---------------------------turn 180-------------------------
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for(int y = 0; y < new_height; ++y){
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for(int x = new_width-1; x >= 0; --x){
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if(bit == 24) {
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unsigned char b = raw[(int)(y/radio_h)][(int)(x/radio_w)][2];
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unsigned char g = raw[(int)(y/radio_h)][(int)(x/radio_w)][1];
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unsigned char r = raw[(int)(y/radio_h)][(int)(x/radio_w)][0];
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unsigned char color[] = {r, g, b};
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outfile.write((char*)color, 3);
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}
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// else if(bit == 8){
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// outfile.write((char*)&raw[i][j], sizeof(char*));
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// }
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}
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outfile.write((char*)bmpPad, padding);
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}
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outfile.close();
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return 0;
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break;
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case 3:
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//---------------------------turn 270-------------------------
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for(int x = new_width - 1; x >= 0; --x){
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for(int y = new_height-1; y >= 0; --y){
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if(bit == 24) {
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unsigned char b = raw[(int)(y/radio_h)][(int)(x/radio_w)][2];
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unsigned char g = raw[(int)(y/radio_h)][(int)(x/radio_w)][1];
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unsigned char r = raw[(int)(y/radio_h)][(int)(x/radio_w)][0];
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unsigned char color[] = {r, g, b};
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outfile.write((char*)color, 3);
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}
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// else if(bit == 8){
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// outfile.write((char*)&raw[i][j], sizeof(char*));
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// }
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}
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outfile.write((char*)bmpPad, padding);
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}
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outfile.close();
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return 0;
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break;
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default:
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return 0;
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break;
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}
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//-----------------------------------------------------------------------------
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outfile.close();
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return 0;
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} |