Manpages OpenGL - glFlushMappedBufferRange

Page OpenGL 4.X Page OpenGL 3.X --- Revenir au moteur de recherche

Name

glFlushMappedBufferRange — indicate modifications to a range of a mapped buffer

C Specification

`void glFlushMappedBufferRange(`	GLenum `target`,
	GLintptr `offset`,
	GLsizeiptr `length)`;

Parameters

target: Specifies the target of the flush operation. target must be GL_ARRAY_BUFFER, GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, GL_DISPATCH_INDIRECT_BUFFER, GL_DRAW_INDIRECT_BUFFER, GL_ELEMENT_ARRAY_BUFFER, GL_PIXEL_PACK_BUFFER, GL_PIXEL_UNPACK_BUFFER, GL_QUERY_BUFFER, GL_SHADER_STORAGE_BUFFER, GL_TEXTURE_BUFFER, GL_TRANSFORM_FEEDBACK_BUFFER, or GL_UNIFORM_BUFFER.
offset: Specifies the start of the buffer subrange, in basic machine units.
length: Specifies the length of the buffer subrange, in basic machine units.

Description

glFlushMappedBufferRange indicates that modifications have been made to a range of a mapped buffer. The buffer must previously have been mapped with the GL_MAP_FLUSH_EXPLICIT_BIT flag. offset and length indicate the modified subrange of the mapping, in basic units. The specified subrange to flush is relative to the start of the currently mapped range of the buffer. glFlushMappedBufferRange may be called multiple times to indicate distinct subranges of the mapping which require flushing.

Notes

The GL_DISPATCH_INDIRECT_BUFFER and GL_SHADER_STORAGE_BUFFER targets are available only if the GL version is 4.3 or greater.

The GL_QUERY_BUFFER target is available only if the GL version is 4.4 or greater.

Errors

GL_INVALID_VALUE is generated if offset or length is negative, or if offset + length exceeds the size of the mapping.

GL_INVALID_OPERATION is generated if zero is bound to target.

GL_INVALID_OPERATION is generated if the buffer bound to target is not mapped, or is mapped without the GL_MAP_FLUSH_EXPLICIT_BIT flag.