/// <summary>
/// Initializes a new instance of the <see cref="GraphicsDevice" /> class.
/// </summary>
/// <param name="adapter">The graphics adapter.</param>
/// <param name="graphicsProfile">The graphics profile.</param>
/// <param name="presentationParameters">The presentation options.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="presentationParameters"/> is <see langword="null"/>.
/// </exception>
public GraphicsDevice(
GraphicsAdapter adapter,
GraphicsProfile graphicsProfile,
PresentationParameters presentationParameters
)
{
if (presentationParameters == null)
{
throw new ArgumentNullException("presentationParameters");
}
// Set the properties from the constructor parameters.
Adapter = adapter;
PresentationParameters = presentationParameters;
GraphicsProfile = graphicsProfile;
// Set up the OpenGL Device. Loads entry points.
GLDevice = new OpenGLDevice(PresentationParameters);
// Force set the default render states.
BlendState = BlendState.Opaque;
DepthStencilState = DepthStencilState.Default;
RasterizerState = RasterizerState.CullCounterClockwise;
// Initialize the Texture/Sampler state containers
Textures = new TextureCollection(this);
SamplerStates = new SamplerStateCollection(this);
// Clear constant buffers
vertexConstantBuffers.Clear();
pixelConstantBuffers.Clear();
// First draw will need to set the shaders.
vertexShaderDirty = true;
pixelShaderDirty = true;
// Set the default viewport and scissor rect.
Viewport = new Viewport(PresentationParameters.Bounds);
ScissorRectangle = Viewport.Bounds;
// Free all the cached shader programs.
programCache.Clear();
shaderProgram = null;
}
public void Dispose()
{
uint handle = Handle;
glDevice.BindFramebuffer(0);
glDevice.glDeleteFramebuffers(1, ref handle);
glDevice.glDeleteRenderbuffers(1, ref colorAttachment);
if (depthStencilAttachment != 0)
{
glDevice.glDeleteRenderbuffers(1, ref depthStencilAttachment);
}
if (Texture != 0)
{
glDevice.glDeleteTextures(1, ref Texture);
}
glDevice = null;
Handle = 0;
}
public OpenGLBackbuffer(
OpenGLDevice device,
int width,
int height,
DepthFormat depthFormat,
int multiSampleCount
) {
Width = width;
Height = height;
glDevice = device;
DepthFormat = depthFormat;
MultiSampleCount = multiSampleCount;
Texture = 0;
// Generate and bind the FBO.
uint handle;
glDevice.glGenFramebuffers(1, out handle);
Handle = handle;
glDevice.BindFramebuffer(Handle);
// Create and attach the color buffer
glDevice.glGenRenderbuffers(1, out colorAttachment);
glDevice.glBindRenderbuffer(GLenum.GL_RENDERBUFFER, colorAttachment);
if (multiSampleCount > 0)
{
glDevice.glRenderbufferStorageMultisample(
GLenum.GL_RENDERBUFFER,
multiSampleCount,
GLenum.GL_RGBA8,
width,
height
);
}
else
{
glDevice.glRenderbufferStorage(
GLenum.GL_RENDERBUFFER,
GLenum.GL_RGBA8,
width,
height
);
}
glDevice.glFramebufferRenderbuffer(
GLenum.GL_FRAMEBUFFER,
GLenum.GL_COLOR_ATTACHMENT0,
GLenum.GL_RENDERBUFFER,
colorAttachment
);
if (depthFormat == DepthFormat.None)
{
// Don't bother creating a depth/stencil buffer.
depthStencilAttachment = 0;
// Keep this state sane.
glDevice.glBindRenderbuffer(GLenum.GL_RENDERBUFFER, 0);
return;
}
// Create and attach the depth/stencil buffer
glDevice.glGenRenderbuffers(1, out depthStencilAttachment);
glDevice.glBindRenderbuffer(GLenum.GL_RENDERBUFFER, depthStencilAttachment);
if (multiSampleCount > 0)
{
glDevice.glRenderbufferStorageMultisample(
GLenum.GL_RENDERBUFFER,
multiSampleCount,
XNAToGL.DepthStorage[(int) depthFormat],
width,
height
);
}
else
{
glDevice.glRenderbufferStorage(
GLenum.GL_RENDERBUFFER,
XNAToGL.DepthStorage[(int) depthFormat],
width,
height
);
}
glDevice.glFramebufferRenderbuffer(
GLenum.GL_FRAMEBUFFER,
GLenum.GL_DEPTH_ATTACHMENT,
GLenum.GL_RENDERBUFFER,
depthStencilAttachment
);
if (depthFormat == DepthFormat.Depth24Stencil8)
{
glDevice.glFramebufferRenderbuffer(
GLenum.GL_FRAMEBUFFER,
GLenum.GL_STENCIL_ATTACHMENT,
GLenum.GL_RENDERBUFFER,
depthStencilAttachment
);
}
// Keep this state sane.
glDevice.glBindRenderbuffer(GLenum.GL_RENDERBUFFER, 0);
}
