glgetshaderprecisionformat(3g) [debian man page]
GLGETSHADERPRECISION(3G) [FIXME: manual] GLGETSHADERPRECISION(3G) NAME
glGetShaderPrecisionFormat - retrieve the range and precision for numeric formats supported by the shader compiler C SPECIFICATION
void glGetShaderPrecisionFormat(GLenum shaderType, GLenum precisionType, GLint *range, GLint *precision); PARAMETERS
shaderType Specifies the type of shader whose precision to query. shaderType must be GL_VERTEX_SHADER or GL_FRAGMENT_SHADER. precisionType Specifies the numeric format whose precision and range to query. range Specifies the address of array of two integers into which encodings of the implementation's numeric range are returned. precision Specifies the address of an integer into which the numeric precision of the implementation is written. DESCRIPTION
glGetShaderPrecisionFormat retrieves the numeric range and precision for the implementation's representation of quantities in different numeric formats in specified shader type. shaderType specifies the type of shader for which the numeric precision and range is to be retrieved and must be one of GL_VERTEX_SHADER or GL_FRAGMENT_SHADER. precisionType specifies the numeric format to query and must be one of GL_LOW_FLOAT, GL_MEDIUM_FLOAT GL_HIGH_FLOAT, GL_LOW_INT, GL_MEDIUM_INT, or GL_HIGH_INT. range points to an array of two integers into which the format's numeric range will be returned. If min and max are the smallest values representable in the format, then the values returned are defined to be: range[0] = floor(log2(|min|)) and range[1] = floor(log2(|max|)). precision specifies the address of an integer into which will be written the log2 value of the number of bits of precision of the format. If the smallest representable value greater than 1 is 1 + eps, then the integer addressed by precision will contain floor(-log2(eps)). ERRORS
GL_INVALID_ENUM is generated if shaderType or precisionType is not an accepted value. COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. [FIXME: source] 05/30/2012 GLGETSHADERPRECISION(3G)
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GLCREATESHADER(3G) OpenGL 3.3 GLCREATESHADER(3G) NAME
glCreateShader - Creates a shader object C SPECIFICATION
GLuint glCreateShader(GLenum shaderType); 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
glCreateShader 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
glGetShader() with a valid shader object and the parameter to be queried glGetShaderInfoLog() with a valid shader object glGetShaderSource() with a valid shader object glIsShader() SEE ALSO
glAttachShader(), glCompileShader(), glDeleteShader(), glDetachShader(), glShaderSource() COPYRIGHT
Copyright (C) 2003-2005 3Dlabs Inc. Ltd. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. OpenGL 3.3 03/08/2011 GLCREATESHADER(3G)