glGetBufferParameteriv — return parameters of a buffer object
void glGetBufferParameteriv( | GLenum target, |
| GLenum value, | |
GLint * data); |
void glGetBufferParameteri64v( | GLenum target, |
| GLenum value, | |
GLint64 * data); |
target Specifies the target buffer object. The symbolic constant must be GL_ARRAY_BUFFER, GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, GL_ELEMENT_ARRAY_BUFFER, GL_PIXEL_PACK_BUFFER, GL_PIXEL_UNPACK_BUFFER, GL_TEXTURE_BUFFER, GL_TRANSFORM_FEEDBACK_BUFFER, or GL_UNIFORM_BUFFER.
value Specifies the symbolic name of a buffer object parameter. Accepted values are GL_BUFFER_ACCESS, GL_BUFFER_MAPPED, GL_BUFFER_SIZE, or GL_BUFFER_USAGE.
dataReturns the requested parameter.
glGetBufferParameteriv returns in data a selected parameter of the buffer object specified by target.
value names a specific buffer object parameter, as follows:
GL_BUFFER_ACCESS params returns the access policy set while mapping the buffer object. The initial value is GL_READ_WRITE.
GL_BUFFER_MAPPED params returns a flag indicating whether the buffer object is currently mapped. The initial value is GL_FALSE.
GL_BUFFER_SIZE params returns the size of the buffer object, measured in bytes. The initial value is 0.
GL_BUFFER_USAGE params returns the buffer object's usage pattern. The initial value is GL_STATIC_DRAW.
If an error is generated, no change is made to the contents of data.
glGetBufferParameteri64v is available only if the GL version is 3.2 or higher.
GL_INVALID_ENUM is generated if target or value is not an accepted value.
GL_INVALID_OPERATION is generated if the reserved buffer object name 0 is bound to target.
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