Diff: Bitmap.cpp

Revision:

38:92fad278c2c3

Child:

40:c9262294f2e1

diff -r 2d5931a66fba -r 92fad278c2c3 Bitmap.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Bitmap.cpp	Wed Mar 08 14:12:42 2017 +0000
@@ -0,0 +1,34 @@
+#include "Bitmap.h"
+
+#include <iostream>
+
+Bitmap::Bitmap(std::vector<int> const &contents,
+               unsigned int const       height,
+               unsigned int const       width)
+    :
+    _contents(contents),
+    _height(height),
+    _width(width)
+{
+    // Perform a quick sanity check of the dimensions
+    if (contents.size() != height * height) {
+        std::cerr << "Contents of bitmap has size " << contents.size()
+                  << " pixels, but its dimensions were specified as "
+                  << width << " * " << height << " = " << width * height;
+    }
+}
+
+int Bitmap::get_pixel(unsigned int const row,
+                      unsigned int const column) const
+{
+    // First check that row and column indices are within bounds
+    if(column >= _width || row >= _height)
+    {
+        std::cerr << "The requested pixel with index " << row << "," << column
+                  << "is outside the bitmap dimensions: " << _width << ","
+                  << _height;
+    }
+
+    // Now return the pixel value, using row-major indexing
+    return _contents[row * _width + column];
+}
\ No newline at end of file