OpenGL State Helper¶

group FnGLStateHelper

Enums

enum Bit¶

Each client is responsible for setting up their own renderstate before submitting draw jobs. Often a client will need to temporarily change state for their purpose. The purpose of GLStateRestore is to provide a RAII mechanism to do this. The various bits to restore.

See

https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPushAttrib.xml

Values:

Enable = GL_ENABLE_BIT¶

AccumuBuffer = GL_ACCUM_BUFFER_BIT¶

ColorBuffer = GL_COLOR_BUFFER_BIT¶

Current = GL_CURRENT_BIT¶

DepthBuffer = GL_DEPTH_BUFFER_BIT¶

Eval = GL_EVAL_BIT¶

Fog = GL_FOG_BIT¶

Hint = GL_HINT_BIT¶

Lighting = GL_LIGHTING_BIT¶

Line = GL_LINE_BIT¶

List = GL_LIST_BIT¶

Multisample = GL_MULTISAMPLE_BIT¶

PixelMode = GL_PIXEL_MODE_BIT¶

Point = GL_POINT_BIT¶

Polygon = GL_POLYGON_BIT¶

PolygonStipple = GL_POLYGON_STIPPLE_BIT¶

Scissor = GL_SCISSOR_BIT¶

StencilBuffer = GL_STENCIL_BUFFER_BIT¶

Texture = GL_TEXTURE_BIT¶

Transform = GL_TRANSFORM_BIT¶

Viewport = GL_VIEWPORT_BIT¶

enum Binding¶

Bindings to unbind on destruction.

Values:

UnbindArrayBuffer = 1u << 0u¶

UnbindTexture = 1u << 1u¶

UnbindVertexArray = 1u << 2u¶

UnbindProgram = 1u << 3u¶

UnbindAll = UnbindArrayBuffer | UnbindTexture | UnbindVertexArray | UnbindProgram¶

class GLStateRestore¶

#include <FnGLStateHelper.h>

Provide a RAII mechanism to temporarily change the OpenGL state.

Public Functions

GLStateRestore(GLbitfield mask, Bindings bindings = 0)¶

Constructor. mask should be any combination of the Bit enumeration values.

glPushAttrib(mask)¶

~GLStateRestore()¶

Destructor.