83 lines
2.0 KiB
C
Executable File
83 lines
2.0 KiB
C
Executable File
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libgen.h>
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#include "../lib/imageio.h"
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void tackName(char* fileAndPath, char* ending, char* dest);
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int main(int argc,char * argv[]){
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if (argc != 3) {
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printf("Usage: intensity <file path> <intensity>\n");
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return -1;
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}
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IMAGE org = image_open(argv[1]);
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if (org == NULL) {
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printf("Failed to open file: %s\n", argv[1]);
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return -1;
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}
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float intensity = (float) atof(argv[2]);
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IMAGE clone = image_clone(org);
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if (clone == NULL) {
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printf("Failed to clone image.\n");
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return -1;
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}
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image_close(org);
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int width = image_width(clone);
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int height = image_height(clone);
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int size = width * height;
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int* pixels = image_pixels(clone);
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unsigned char* pixelChannel; // = pixels[0] + 1;
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// 0xAABBGGRR
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for (int i = 0; i < size; i++) {
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//pixelChannel = (unsigned char*) (&pixels + i);
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for (int j = 0; j < 3; j++) { // BB, GG, RR...
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pixelChannel = (unsigned char*) (&pixels[i]) + j;
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// Skip alpha channel.
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//char temp = *pixelChannel;
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//*pixelChannel = (char) (*pixelChannel * intensity);
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//printf("%d * %f = %f or %d -> 0x%x\n", *pixelChannel, intensity, *pixelChannel * intensity, (unsigned char) (*pixelChannel * intensity), (unsigned char) (*pixelChannel * intensity));
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if ( (float) *pixelChannel * intensity > 0xFF) {
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*pixelChannel = 0xFF; // Cap it.
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} else {
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*pixelChannel = (unsigned char) (*pixelChannel * intensity);
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}
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//printf("{%d/%d}[%p]: %d -> %d\n", i, size, pixelChannel, temp, *pixelChannel);
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}
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}
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char fileStr[strlen(argv[1]) + 8];
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tackName(argv[1], "_int.jpg", fileStr);
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if (image_save(clone, fileStr)) {
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printf("Failure while saving image.\n");
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return -1;
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}
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image_close(clone);
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return 0;
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}
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void tackName(char* fileAndPath, char* ending, char* dest) {
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int index;
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char* file = basename(fileAndPath);
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for (index = strlen(file) - 1; index > 0; index--) {
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if (file[index] == '.') {
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break;
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}
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}
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strncpy(dest, file, index);
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dest[index] = '\0';
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strcat(dest, ending);
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}
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