Merge branch 'main' into feature/vignette-filter

Author: harshsankhla18

.vscode/settings.json

@@ -1,3 +1,6 @@
 {
- "C_Cpp.errorSquiggles": "disabled"
+ "C_Cpp.errorSquiggles": "disabled",
+ "files.associations": {
+ "helpers.h": "c"
+ }
 }

filter.exe

@@ -1,5 +1,7 @@
 #include "helpers.h"
-
+#include <stdint.h>
+#include <stdlib.h>
+#include "bmp.h"
 int min(int a,int b){
  if(a<b) return a;
  return b;
@@ -66,12 +68,63 @@ void sepia(int height, int width, RGBTRIPLE image[height][width]){
 
 void reflect(int height, int width, RGBTRIPLE image[height][width]){
 
-// Reflect image horizontally
+ // Loop over each row
+ for (int i = 0; i < height; i++)
+ {
+ // Swap pixels horizontally (mirror)
+ for (int j = 0; j < width / 2; j++)
+ {
+ // Swap left pixel with right pixel
+ RGBTRIPLE temp = image[i][j];
+ image[i][j] = image[i][width - 1 - j];
+ image[i][width - 1 - j] = temp;
+ }
+ }
 
 }
 
 
 void blur(int height, int width, RGBTRIPLE image[height][width]){
+ // Allocate temporary array on heap
+ RGBTRIPLE **temp = malloc(height * sizeof(RGBTRIPLE *));
+ for (int i = 0; i < height; i++)
+ temp[i] = malloc(width * sizeof(RGBTRIPLE));
+
+ int kernelSize = 21; // large kernel for heavy blur
+ int offset = kernelSize / 2;
+ // Repeating blur 2-3 times for ultra blur effect 
+ //because in single time effect not much visible
+ for(int repeat = 0; repeat < 3; repeat++){
+ for(int i = 0; i < height; i++){
+ for (int j = 0; j < width; j++){
+ int sumRed = 0, sumGreen = 0, sumBlue = 0;
+ int count = 0;
+ for (int ki = -offset; ki <= offset; ki++){
+ for(int kj = -offset; kj <= offset; kj++){
+ int ni = i + ki;
+ int nj = j + kj;
+ if(ni >= 0 && ni < height && nj >= 0 && nj < width){
+ sumRed += image[ni][nj].rgbtRed;
+ sumGreen += image[ni][nj].rgbtGreen;
+ sumBlue += image[ni][nj].rgbtBlue;
+ count++;
+ }
+ }
+ }
+ temp[i][j].rgbtRed = (uint8_t)(sumRed / count);
+ temp[i][j].rgbtGreen = (uint8_t)(sumGreen / count);
+ temp[i][j].rgbtBlue = (uint8_t)(sumBlue / count);
+ }
+ }
+ // Copy blurred array back to orig
+ for (int i = 0; i < height; i++)
+ for (int j = 0; j < width; j++)
+ image[i][j] = temp[i][j];
+ }
+ for (int i = 0; i < height; i++)
+ free(temp[i]);
+ free(temp);
+}
 
 // Blur image
 
@@ -94,4 +147,4 @@ void vignette(int height, int width, RGBTRIPLE image[height][width]){
  image[i][j].rgbtBlue = (int)(image[i][j].rgbtBlue * vig);
  }
  }
-}
+}