~file-handler->files,(main~>files)~migrated png save code to files.c

files.c

@@ -0,0 +1,50 @@
+/* file-handler.c
+ * Created: 2023-08-25
+ * Author: Aryadev Chavali
+ * Description: Implementations of writing and loading state->from files
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <stb/stb_image_write.h>
+
+#include "./lib.h"
+
+#define CHUNK_SIZE 1024
+
+bool write_to_png(state_t *state, const char *filepath)
+{
+  unsigned char *image_data =
+      calloc(3 * state->dwidth * state->dwidth, sizeof(*image_data));
+
+  size_t image_ptr = 0;
+
+  for (size_t i = 0; i < state->dwidth; ++i)
+    for (size_t j = 0; j < state->dwidth; ++j, image_ptr += 3)
+    {
+      unsigned char colour[3] = {0};
+      uint64_t sandpile       = state->data[(i * state->dwidth) + j];
+      if (sandpile == 0)
+        colour[0] = colour[1] = colour[2] = 0;
+      else if (sandpile == 1)
+        colour[0] = colour[2] = 255;
+      else if (sandpile == 2)
+      {
+        colour[0] = 255;
+        colour[1] = colour[2] = 20;
+      }
+      else if (sandpile == 3)
+      {
+        colour[2] = 255;
+        colour[0] = colour[1] = 20;
+      }
+
+      memcpy(image_data + image_ptr, colour, sizeof(*colour) * 3);
+    }
+
+  stbi_write_png(filepath, state->dwidth, state->dwidth, 3, image_data,
+                 3 * state->dwidth);
+  free(image_data);
+  return true;
+}