Reshuffled

src/display/tileset.c

@@ -0,0 +1,66 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "tileset.h"
+
+tileset_t * tilesetCreate(
+  int32_t columns, int32_t rows,
+  int32_t width, int32_t height,
+  int32_t gapX, int32_t gapY,
+  int32_t borderX, int32_t borderY
+) {
+  tileset_t *tileset;
+  float divX, divY, tdivX;
+  int32_t x, y, i;
+
+  tileset = malloc(sizeof(tileset_t));
+  if(tileset == NULL) return NULL;
+
+  tileset->count = rows * columns;
+  tileset->divisions = malloc(sizeof(tilesetdiv_t) * tileset->count);
+  if(tileset->divisions == NULL) {
+    free(tileset);
+    return NULL;
+  }
+  
+  tileset->columns = columns;
+  tileset->rows = rows;
+
+  // Calculate division sizes (pixels)
+  divX = (width - (borderX * 2) - (gapX * (columns - 1))) / columns;
+  divY = (height - (borderY * 2) - (gapY * (rows - 1))) / rows;
+
+  // Calculate the division sizes (units)
+  divX = divX / width;
+  divY = divY / height;
+
+  // Calculate the divisions
+  i = -1;
+  for(y = 0; y < rows; y++) {
+    for(x = 0; x < columns; x++) {
+      tileset->divisions[++i].x0 = borderX + (divX * x) + (gapX * x);
+      tileset->divisions[i].y0 = borderY + (divY * y) + (gapY * y);
+      tileset->divisions[i].x1 = tileset->divisions[i].x0 + divX;
+      tileset->divisions[i].y1 = tileset->divisions[i].y0 + divY;
+    }
+  }
+
+  return tileset;
+}
+
+tilesetdiv_t tilesetGetDivision(tileset_t *tileset,
+  int32_t column, int32_t row
+) {
+  return tileset->divisions[
+    (column % tileset->columns) + (row * tileset->columns)
+  ];
+}
+
+void tilesetDispose(tileset_t *tileset) {
+  free(tileset->divisions);
+  free(tileset);
+}