Gambas Documentation - /comp/gb.opengl.glsl/gl/createshader

/comp/gb.opengl.glsl/gl/createshader

# Gl.CreateShader (gb.opengl.glsl)

Static Function CreateShader ( ShaderType As Integer ) As Integer

Creates a shader object.

### Parameters

shaderType

  Specifies the type of shader to be created. Must be one of Gl.VERTEX_SHADER, Gl.GEOMETRY_SHADER or Gl.FRAGMENT_SHADER.

### Description

Gl.CreateShader creates an empty shader object and returns a non-zero value by which it can be referenced. A shader object is used to maintain the source code strings that define a shader. shaderType indicates the type of shader to be created. Three types of shaders are supported. A shader of type Gl.VERTEX_SHADER is a shader that is intended to run on the programmable vertex processor. A shader of type Gl.GEOMETRY_SHADER is a shader that is intended to run on the programmable geometry processor. A shader of type Gl.FRAGMENT_SHADER is a shader that is intended to run on the programmable fragment processor.

When created, a shader object's Gl.SHADER_TYPE parameter is set to either Gl.VERTEX_SHADER, Gl.GEOMETRY_SHADER or Gl.FRAGMENT_SHADER, depending on the value of shaderType.

### Notes

Like buffer and texture objects, the name space for shader objects may be shared across a set of contexts, as long as the server sides of the contexts share the same address space. If the name space is shared across contexts, any attached objects and the data associated with those attached objects are shared as well.

Applications are responsible for providing the synchronization across API calls when objects are accessed from different execution threads.

### Errors

This function returns 0 if an error occurs creating the shader object.

Gl.INVALID_ENUM is generated if shaderType is not an accepted value.

### Associated Gets

Gl.GetShader with a valid shader object and the parameter to be queried

Gl.GetShaderInfoLog with a valid shader object

Gl.GetShaderSource with a valid shader object

Gl.IsShader

### See also

- Gl.AttachShader,

- Gl.CompileShader,

- Gl.DeleteShader,

- Gl.DetachShader,

- Gl.ShaderSource

See original documentation on OpenGL website