Class GLGraphicsContext

Manages all graphical functionalities.

Inheritance
object
GraphicsContext
GLGraphicsContext
Implements
Inherited Members
Namespace: Evergine.OpenGL
Assembly: Evergine.OpenGL.dll
Syntax
public class GLGraphicsContext : GraphicsContext, IGetNativePointers

Constructors

GLGraphicsContext()

Initializes a new instance of the GLGraphicsContext class.

Declaration
public GLGraphicsContext()

GLGraphicsContext(GraphicsBackend?)

Initializes a new instance of the GLGraphicsContext class.

Declaration
public GLGraphicsContext(GraphicsBackend? targetGraphicsBackend)
Parameters
Type Name Description
GraphicsBackend? targetGraphicsBackend

The target graphics backend for this graphics context.

Fields

ComputePipelineStateCache

Computes the pipeline state cache.

Declaration
protected GLComputePipelineStateCache ComputePipelineStateCache
Field Value
Type Description
GLComputePipelineStateCache

Extensions

OpenGL extensions.

Declaration
public GLExtensions Extensions
Field Value
Type Description
GLExtensions

GraphicsContext

Graphic context.

Declaration
protected IOpenGLContext GraphicsContext
Field Value
Type Description
IOpenGLContext

GraphicsPipelineStateCache

Cache for the graphics pipeline state.

Declaration
protected GLGraphicsPipelineStateCache GraphicsPipelineStateCache
Field Value
Type Description
GLGraphicsPipelineStateCache

Properties

BackendType

Gets the backend type (DirectX, OpenGL, etc.)

Declaration
public override GraphicsBackend BackendType { get; }
Property Value
Type Description
GraphicsBackend
Overrides

Capabilities

Gets the capabilities of this graphics context.

Declaration
public override GraphicsContextCapabilities Capabilities { get; }
Property Value
Type Description
GraphicsContextCapabilities
Overrides

NativeDevicePointer

Gets the native device pointer.

Declaration
public override nint NativeDevicePointer { get; }
Property Value
Type Description
nint
Overrides

Methods

CreateDefaultSampler()

Creates the default sampler.

Declaration
protected override void CreateDefaultSampler()
Overrides

CreateDeviceInternal()

Initializes the graphics context to be used in a compute shader.

Declaration
public override void CreateDeviceInternal()
Overrides

CreateSwapChain(SwapChainDescription)

Initializes the swap chain.

Declaration
public override SwapChain CreateSwapChain(SwapChainDescription description)
Parameters
Type Name Description
SwapChainDescription description

The swap chain descriptor.
Returns
Type Description
SwapChain

Created Swap chain.
Overrides

Dispose(bool)

Releases unmanaged and optionally managed resources.

Declaration
protected override void Dispose(bool disposing)
Parameters
Type Name Description
bool disposing

true to release both managed and unmanaged resources; false to release only unmanaged resources.
Overrides

GenerateTextureMipmapping(Texture)

Generates mipmapping texture levels.

Declaration
public override bool GenerateTextureMipmapping(Texture texture)
Parameters
Type Name Description
Texture texture

The texture for which mipmapping is generated.
Returns
Type Description
bool

True if the mipmapping has been generated.
Overrides

GetNativePointer(string, out nint)

Obtains a native pointer for this graphics context using the given key.

Declaration
public override bool GetNativePointer(string pointerKey, out nint nativePointer)
Parameters
Type Name Description
string pointerKey

The pointer key.
nint nativePointer

The native pointer.
Returns
Type Description
bool

True if there is an available pointer with this key.
Overrides

InternalUpdateBufferData(Buffer, nint, uint, uint)

Fills the buffer from a pointer.

Declaration
protected override void InternalUpdateBufferData(Buffer buffer, nint source, uint sourceSizeInBytes, uint destinationOffsetInBytes = 0)
Parameters
Type Name Description
Buffer buffer

Buffer instance.
nint source

The data pointer.
uint sourceSizeInBytes

The size in bytes.
uint destinationOffsetInBytes

The offset in bytes.
Overrides

MapMemory(GraphicsResource, MapMode, uint)

Maps a Buffer or Texture to a CPU-accessible data region.

Declaration
public override MappedResource MapMemory(GraphicsResource resource, MapMode mode, uint subResource = 0)
Parameters
Type Name Description
GraphicsResource resource

The graphics resource to map.
MapMode mode

The MapMode used to map the resource.
uint subResource

The subresource to map. Subresources are indexed first by mip slice and then by array layer. Applies only to Textures.
Returns
Type Description
MappedResource

A MappedResource structure describing the mapped data region.
Overrides

ShaderCompile(string, string, ShaderStages, CompilerParameters)

Converts the shader source into bytecode.

Declaration
public override CompilationResult ShaderCompile(string shaderSource, string entryPoint, ShaderStages stage, CompilerParameters parameters)
Parameters
Type Name Description
string shaderSource

The shader source text.
string entryPoint

The entry point function name.
ShaderStages stage

The shader stage, ShaderStages.
CompilerParameters parameters

The compiler parameters.
Returns
Type Description
CompilationResult

The shader bytecode.
Overrides

ToOpenGL(ElementFormat, out int, out bool, out bool)

Converts from ElementFormat to VertexAttribPointerType.

Declaration
protected VertexAttribPointerType ToOpenGL(ElementFormat format, out int size, out bool normalized, out bool isFloat)
Parameters
Type Name Description
ElementFormat format

The element format.
int size

The number of components per generic vertex attribute. Must be 1, 2, 3, or 4.
bool normalized

Indicates if this is a normalized format.
bool isFloat

The formmat is floating point.
Returns
Type Description
VertexAttribPointerType

The VertexAttribPointerType.

UnmapMemory(GraphicsResource, uint)

Invalidates a previously-mapped data region for the given Buffer or Texture.

Declaration
public override void UnmapMemory(GraphicsResource resource, uint subResource = 0)
Parameters
Type Name Description
GraphicsResource resource

The graphics resource to unmap.
uint subResource

The subresource to unmap. Subresources are indexed first by mip slice and then by array layer. Only for Textures.
Overrides

UpdateTextureData(Texture, nint, uint, uint)

Fills the buffer from a pointer.

Declaration
public override void UpdateTextureData(Texture texture, nint source, uint sourceSizeInBytes, uint subResource = 0)
Parameters
Type Name Description
Texture texture

Texture instance.
nint source

The data pointer.
uint sourceSizeInBytes

The size in bytes.
uint subResource

The sub-resource index.
Overrides

Implements

Extension Methods