Initial Upload Week 4 [19/10]

Bitmap.cpp

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+#include "Bitmap.h"
+
+Bitmap::Bitmap()
+{
+}
+
+Bitmap::~Bitmap()
+{
+	// Ensure we clean up any existing bitmap
+	DeleteBitmap();
+}
+
+// Create a new bitmap of the specified width and height, deleting any existing bitmap
+//
+// Returns value of false if bitmap cannot be created.
+
+bool Bitmap::Create(HWND hWnd, unsigned int width, unsigned int height)
+{
+	bool status = false;
+	HDC hDc;
+
+	// Delete any existing bitmap
+	DeleteBitmap();
+
+	// Create a device context compatible with the window device context
+	hDc = ::GetDC(hWnd);
+	_width = width;
+	_height = height;
+	_hMemDC = CreateCompatibleDC(hDc);
+	if (_hMemDC != 0)
+	{
+		// Create a bitmap compatible with the window
+		_hBitmap = CreateCompatibleBitmap(hDc, _width, _height);
+		if (_hBitmap != 0)
+		{
+			// Select the bitmap into the new device context, saving any old bitmap handle
+			_hOldBitmap = static_cast<HBITMAP>(SelectObject(_hMemDC, _hBitmap));
+			status = true;
+		}
+	}
+	// Release the device context for the window
+	ReleaseDC(hWnd, hDc);
+	return status;
+}
+
+// Return device context of bitmap
+
+HDC Bitmap::GetDC() const
+{
+	return _hMemDC;
+}
+
+// Return width of bitmap
+
+unsigned int Bitmap::GetWidth() const
+{
+	return _width;
+}
+
+// Return height of bitmap
+
+unsigned int Bitmap::GetHeight() const
+{
+	return _height;
+}
+
+// Delete any existing bitmap
+
+void Bitmap::DeleteBitmap()
+{
+	// Select any default bitmap that existed for the device context
+	if (_hOldBitmap != 0 && _hMemDC != 0)
+	{
+		SelectObject(_hMemDC, _hOldBitmap);
+		_hOldBitmap = 0;
+	}
+	// Delete any existing bitmap
+	if (_hBitmap != 0)
+	{
+		DeleteObject(_hBitmap);
+		_hBitmap = 0;
+	}
+	// Delete any existing bitmap device context
+	if (_hMemDC != 0)
+	{
+		DeleteDC(_hMemDC);
+		_hMemDC = 0;
+	}
+}
+
+// Clear bitmap using the specified brush
+
+void Bitmap::Clear(HBRUSH hBrush) const
+{
+	RECT rect;
+
+	rect.left = 0;
+	rect.right = _width;
+	rect.top = 0;
+	rect.bottom = _height;
+	FillRect(_hMemDC, &rect, hBrush);
+}
+
+// Clear bitmap using the specified colour
+
+void Bitmap::Clear(COLORREF colour) const
+{
+	HBRUSH brush = CreateSolidBrush(colour);
+	Clear(brush);
+	DeleteObject(brush);
+}