glVertexAttribFormat, glVertexArrayAttribFormat — specify the organization of vertex arrays
void glVertexAttribFormat(
|
GLuint attribindex, |
| GLint size, | |
| GLenum type, | |
| GLboolean normalized, | |
GLuint relativeoffset); |
void glVertexAttribIFormat(
|
GLuint attribindex, |
| GLint size, | |
| GLenum type, | |
GLuint relativeoffset); |
void glVertexAttribLFormat(
|
GLuint attribindex, |
| GLint size, | |
| GLenum type, | |
GLuint relativeoffset); |
void glVertexArrayAttribFormat(
|
GLuint vaobj, |
| GLuint attribindex, | |
| GLint size, | |
| GLenum type, | |
| GLboolean normalized, | |
GLuint relativeoffset); |
void glVertexArrayAttribIFormat(
|
GLuint vaobj, |
| GLuint attribindex, | |
| GLint size, | |
| GLenum type, | |
GLuint relativeoffset); |
void glVertexArrayAttribLFormat(
|
GLuint vaobj, |
| GLuint attribindex, | |
| GLint size, | |
| GLenum type, | |
GLuint relativeoffset); |
vaobj
Specifies the name of the vertex array object for
glVertexArrayAttrib{I, L}Format
functions.
attribindex
The generic vertex attribute array being described.
size
The number of values per vertex that are stored in the array.
type
The type of the data stored in the array.
normalized
Specifies whether fixed-point data values should be normalized (GL_TRUE) or
converted directly as fixed-point values (GL_FALSE) when they are accessed. This parameter is ignored if type is GL_FIXED.
relativeoffset
The distance between elements within the buffer.
glVertexAttribFormat,
glVertexAttribIFormat and
glVertexAttribLFormat, as well as
glVertexArrayAttribFormat,
glVertexArrayAttribIFormat and
glVertexArrayAttribLFormat specify the organization
of data in vertex arrays. The first three calls operate on the bound
vertex array object, whereas the last three ones modify the state of a
vertex array object with ID vaobj.
attribindex specifies the index of the generic
vertex attribute array whose data layout is being described, and must be
less than the value of GL_MAX_VERTEX_ATTRIBS.
size determines the number of components per
vertex are allocated to the specified attribute and must be 1, 2, 3, 4, or
GL_BGRA. type indicates the type of the
data. If type is one of GL_BYTE,
GL_SHORT, GL_INT,
GL_FIXED, GL_FLOAT,
GL_HALF_FLOAT, and GL_DOUBLE
indicate types GLbyte, GLshort,
GLint, GLfixed, GLfloat,
GLhalf, and GLdouble, respectively; the values
GL_UNSIGNED_BYTE,
GL_UNSIGNED_SHORT, and
GL_UNSIGNED_INT indicate types GLubyte,
GLushort, and GLuint, respectively; the values
GL_INT_2_10_10_10_REV and
GL_UNSIGNED_INT_2_10_10_10_REV indicating
respectively four signed or unsigned elements packed into a single
GLuint; and the value
GL_UNSIGNED_INT_10F_11F_11F_REV indicating three
floating point values packed into a single GLuint.
glVertexAttribLFormat and
glVertexArrayAttribLFormat is used to specify layout
for data associated with a generic attribute variable declared as 64-bit
double precision components. For
glVertexAttribLFormat and
glVertexArrayAttribLFormat,
type must be GL_DOUBLE. In
contrast to glVertexAttribFormat or
glVertexArrayAttribFormat, which will cause data
declared as GL_DOUBLE to be converted to 32-bit
representation, glVertexAttribLFormat and
glVertexArrayAttribLFormat cause such data to be left
in its natural, 64-bit representation.
For glVertexAttribFormat and
glVertexArrayAttribFormat, if
normalized is GL_TRUE, then
integer data is normalized to the range [-1, 1] or [0, 1] if it is signed
or unsigned, respectively. If normalized is
GL_FALSE then integer data is directly converted to
floating point.
relativeoffset is the offset, measured in
basic machine units of the first element relative to the start of the
vertex buffer binding this attribute fetches from.
glVertexAttribFormat and
glVertexArrayAttribFormat should be used to describe
vertex attribute layout for floating-point vertex attributes,
glVertexAttribIFormat and
glVertexArrayAttribIFormat should be used to describe
vertex attribute layout for integer vertex attribute, and
glVertexAttribLFormat and
glVertexArrayAttribLFormat should be used to describe
the layout for 64-bit vertex attributes. Data for an array specified by
glVertexAttribIFormat and
glVertexArrayAttribIFormat will always be left as
integer values; such data are referred to as pure integers.
GL_UNSIGNED_INT_10F_11F_11F_REV is accepted for
type only if the GL version is 4.4 or
higher.
GL_INVALID_VALUE is generated if
attribindex is greater than or equal to the value
of GL_MAX_VERTEX_ATTRIBS.
GL_INVALID_VALUE is generated if
size is not one of the accepted values.
GL_INVALID_VALUE is generated if
relativeoffset is greater than the value of
GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET.
GL_INVALID_ENUM is generated if
type is not one of the accepted tokens.
GL_INVALID_ENUM is generated by
glVertexAttribIFormat,
glVertexAttribLFormat,
glVertexArrayAttribIFormat and
glVertexArrayAttribLFormat if
type is
GL_UNSIGNED_INT_10F_11F_11F_REV.
GL_INVALID_OPERATION is generated by
glVertexAttribFormat,
glVertexAttribIFormat and
glVertexAttribLFormat if no vertex array object is
bound.
GL_INVALID_OPERATION is generated by
glVertexArrayAttribFormat,
glVertexArrayAttribIFormat and
glVertexArrayAttribLFormat if
vaobj is not the name of an existing vertex array
object.
GL_INVALID_OPERATION is generated under any of
the following conditions:
size is GL_BGRA
and type is not
GL_UNSIGNED_BYTE,
GL_INT_2_10_10_10_REV or
GL_UNSIGNED_INT_2_10_10_10_REV.
type is
GL_INT_2_10_10_10_REV or
GL_UNSIGNED_INT_2_10_10_10_REV, and
size is neither 4 nor
GL_BGRA.
type is
GL_UNSIGNED_INT_10F_11F_11F_REV and
size is not 3.
size is GL_BGRA
and normalized is
GL_FALSE.
glGet
with arguments GL_MAX_VERTEX_ATTRIB_BINDINGS, or
GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET.
glGetVertexAttrib
with argument GL_VERTEX_ATTRIB_RELATIVE_OFFSET.
| OpenGL Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 |
glVertexArrayAttribFormat
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
glVertexArrayAttribIFormat
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
glVertexArrayAttribLFormat
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
glVertexAttribFormat
|
- | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔ |
glVertexAttribIFormat
|
- | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔ |
glVertexAttribLFormat
|
- | - | - | - | - | - | - | - | - | ✔ | ✔ | ✔ |
glBindVertexBuffer, glVertexAttribBinding, glVertexAttribPointer, glVertexBindingDivisor, glVertexAttribPointer.
Copyright © 2013-2014 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. https://opencontent.org/openpub/.