/// <summary>
/// Construct the default ViewportState corresponding to a specific <see cref="GraphicsSurface"/>.
/// </summary>
/// <param name="graphicsSurface">
/// The <see cref="GraphicsSurface"/> that specify tha default viewport extents.
/// </param>
public ViewportState(GraphicsSurface graphicsSurface)
{
if (graphicsSurface == null)
{
throw new ArgumentNullException("graphicsSurface");
}
Viewport = new Vertex4i(0, 0, (int)graphicsSurface.Width, (int)graphicsSurface.Height);
}
/// <summary>
/// Construct a ViewportState representing the current viewport state.
/// </summary>
/// <param name="ctx">
/// The <see cref="GraphicsContext"/> holding the viewport state.
/// </param>
public ViewportState(GraphicsContext ctx)
{
CheckCurrentContext(ctx);
// Get current viewport
int[] viewportCoords = new int[4];
Gl.Get(Gl.VIEWPORT, viewportCoords);
Viewport = new Vertex4i(viewportCoords[0], viewportCoords[1], viewportCoords[2], viewportCoords[3]);
}
public void TestUniform4i()
{
if (!HasVersion(2, 0) && !HasEsVersion(2, 0) && !IsGlExtensionSupported("GL_ARB_shader_objects"))
{
Assert.Inconclusive("required features not implemented");
}
using (Device device = new Device())
using (new GLContext(device))
{
uint program = CreateProgramUniform4i();
try {
Vertex4i uniformStruct;
int[] uniformValue;
int uniformLoc = Gl.GetUniformLocation(program, "uVec");
if (uniformLoc < 0)
{
throw new InvalidOperationException("no uniform variable");
}
// glGetUniformiv
uniformValue = Array4(1);
Gl.GetUniform(program, uniformLoc, uniformValue);
CollectionAssert.AreEqual(Array4(0), uniformValue);
// glGetUniformiv (ref)
uniformStruct = new Vertex4i(1);
Gl.GetUniformi(program, uniformLoc, ref uniformStruct);
Assert.AreEqual(Vertex4i.Zero, uniformStruct);
// glUniform4i
uniformValue = Array4(0);
Gl.Uniform4(uniformLoc, Array4(1));
Gl.GetUniform(program, uniformLoc, uniformValue);
CollectionAssert.AreEqual(Array4(1), uniformValue);
// glUniform4iv
uniformValue = Array4(0);
Gl.Uniform4(uniformLoc, Array4(9));
Gl.GetUniform(program, uniformLoc, uniformValue);
CollectionAssert.AreEqual(Array4(9), uniformValue);
// glUniform4iv (ref)
uniformValue = Array4(0);
uniformStruct = new Vertex4i(5);
Gl.Uniform4i(uniformLoc, 1, ref uniformStruct);
Gl.GetUniform(program, uniformLoc, uniformValue);
CollectionAssert.AreEqual(Array4(5), uniformValue);
} finally {
Gl.DeleteProgram(program);
}
}
}
/// <summary>
/// Merge this state with another one.
/// </summary>
/// <param name="state">
/// A <see cref="IGraphicsState"/> having the same <see cref="GraphicsState.StateIdentifier"/> of this state.
/// </param>
/// <remarks>
/// <para>
/// After a call to this routine, this IGraphicsState store the union of the previous information
/// and of the information of <paramref name="state"/>.
/// </para>
/// <para>
/// The semantic of the merge result is dependent on the actual implementation of this IGraphicsState. Normally
/// the merge method will copy <paramref name="state"/> into this IGraphicsState, but other state could do
/// different operations.
/// </para>
/// </remarks>
public override void Merge(IGraphicsState state)
{
if (state == null)
{
throw new ArgumentNullException("state");
}
if (state.StateIdentifier != StateId)
{
throw new ArgumentException("state id mismatch", "state");
}
ViewportState previousState = (ViewportState)state;
Viewport = previousState.Viewport;
}
void IShaderUniformContainer.SetUniform(GraphicsContext ctx, string uniformName, Vertex4i v)
{
throw new NotImplementedException();
}
/// <summary>
/// Construct a ViewportState specifing the width and the height of the viewport.
/// </summary>
/// <param name="width">
/// A <see cref="Int32"/> that specify the width of the viewport.
/// </param>
/// <param name="height">
/// A <see cref="Int32"/> that specify the height of the viewport.
/// </param>
public ViewportState(int width, int height)
{
Viewport = new Vertex4i(0, 0, width, height);
}
/// <summary>
/// Set uniform state variable (ivec4 variable or bvec4 variable).
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for operations.
/// </param>
/// <param name="uniformName">
/// A <see cref="String"/> that specify the variable name in the shader source.
/// </param>
/// <param name="v">
/// A <see cref="Vertex4i"/> holding the uniform variabile data (first component).
/// </param>
public void SetUniform(GraphicsContext ctx, string uniformName, Vertex4i v)
{
SetUniform(ctx, uniformName, v.x, v.y, v.z, v.w);
}
