public PixelFormatException
(
string message,
ContextCreationParameters parameters,
PixelFormatDescriptor descriptor
) : base(message, parameters)
{
Descriptor = descriptor;
}
public void BuildLegacyContext_CannotChoosePixelFormat_ThrowsPixelFormatException()
{
// Arrange
var wgl = Substitute.For<IWGL>();
var desc = new PixelFormatDescriptor();
wgl.ChoosePixelFormat(Arg.Any<IntPtr>(), ref desc).ReturnsForAnyArgs(0);
var builder = new ContextBuilder(wgl);
// Act
TestDelegate build = () => builder.BuildLegacyContext(new ContextCreationParameters {Window = 1, Device = 1});
// Assert
Assert.That(build, Throws.TypeOf<PixelFormatException>());
}
private static IWGL CreateMockWgl()
{
var wgl = Substitute.For<IWGL>();
var pfd = new PixelFormatDescriptor();
wglChoosePixelFormatARB ch = (hdc, list, fList, formats, piFormats, numFormats) => true;
wglCreateContextAttribsARB createContext = (dc, context, list) => new IntPtr(1);
wgl.ChoosePixelFormat(Arg.Any<IntPtr>(), ref pfd).ReturnsForAnyArgs(1);
wgl.SetPixelFormat(Arg.Any<IntPtr>(), Arg.Any<int>(), ref pfd).ReturnsForAnyArgs(true);
wgl.wglCreateContext(Arg.Any<IntPtr>()).Returns(new IntPtr(1));
wgl.wglMakeCurrent(Arg.Any<IntPtr>(), Arg.Any<IntPtr>()).Returns(true);
wgl.wglGetProcAddress("wglChoosePixelFormatARB").Returns(Marshal.GetFunctionPointerForDelegate(ch));
wgl.wglGetProcAddress("wglCreateContextAttribsARB").Returns(Marshal.GetFunctionPointerForDelegate(createContext));
return wgl;
}
public void BuildLegacyContext_CreateContextReturnsNull_ThrowsContextCreationException()
{
// Arrange
var wgl = Substitute.For<IWGL>();
var desc = new PixelFormatDescriptor();
wgl.ChoosePixelFormat(Arg.Any<IntPtr>(), ref desc).ReturnsForAnyArgs(1);
wgl.SetPixelFormat(Arg.Any<IntPtr>(), Arg.Any<int>(), ref desc).ReturnsForAnyArgs(true);
wgl.wglCreateContext(Arg.Any<IntPtr>()).Returns(IntPtr.Zero);
var builder = new ContextBuilder(wgl);
// Act
TestDelegate build = () => builder.BuildLegacyContext(new ContextCreationParameters { Window = 1, Device = 1 });
// Assert
Assert.That(build, Throws.TypeOf<ContextCreationException>());
}
public IntPtr BuildLegacyContext(ContextCreationParameters parameters)
{
if(parameters.Device == 0)
throw new ContextCreationException("No device specified.", parameters);
if(parameters.Window == 0)
throw new ContextCreationException("No window specified.", parameters);
var desc = new PixelFormatDescriptor
{
Version = 1,
StencilBits = 8,
DepthBits = 24,
ColorBits = 32,
PixelType = PixelType.Rgba,
Size = (ushort)System.Runtime.InteropServices.Marshal.SizeOf(typeof(PixelFormatDescriptor)),
Flags = PixelFormatFlags.DoubleBuffer | PixelFormatFlags.DrawToWindows | PixelFormatFlags.SupportOpenGL,
};
int pixelFormat = _wgl.ChoosePixelFormat((IntPtr)parameters.Device, ref desc);
if (pixelFormat == 0)
throw new PixelFormatException("Could not select an appropriate pixel format.", parameters, desc);
if (!_wgl.SetPixelFormat((IntPtr)parameters.Device, pixelFormat, ref desc))
throw new PixelFormatException("Could not set pixel format for HDC.", parameters, desc);
var glptr = _wgl.wglCreateContext((IntPtr)parameters.Device);
if (glptr == IntPtr.Zero)
throw new ContextCreationException("Unable to create OpenGL context.", parameters);
return glptr;
}
public void BuildLegacyContext_ValidWindowAndHdc_ReturnsContextHandle()
{
// Arrange
var wgl = Substitute.For<IWGL>();
var desc = new PixelFormatDescriptor();
wgl.ChoosePixelFormat(Arg.Any<IntPtr>(), ref desc).ReturnsForAnyArgs(1);
wgl.SetPixelFormat(Arg.Any<IntPtr>(), Arg.Any<int>(), ref desc).ReturnsForAnyArgs(true);
wgl.wglCreateContext(Arg.Any<IntPtr>()).Returns((IntPtr)1);
var builder = new ContextBuilder(wgl);
// Act
var result = builder.BuildLegacyContext(new ContextCreationParameters { Window = 1, Device = 1 });
// Assert
Assert.That(result, Is.EqualTo((IntPtr)1));
}