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docs.GL

glFlushMappedBufferRange

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 to which the buffer object is bound for glFlushMappedBufferRange, which must be one of the buffer binding targets in the following table:

Buffer Binding Target Purpose
GL_ARRAY_BUFFER Vertex attributes
GL_ATOMIC_COUNTER_BUFFER Atomic counter storage
GL_COPY_READ_BUFFER Buffer copy source
GL_COPY_WRITE_BUFFER Buffer copy destination
GL_DISPATCH_INDIRECT_BUFFER Indirect compute dispatch commands
GL_DRAW_INDIRECT_BUFFER Indirect command arguments
GL_ELEMENT_ARRAY_BUFFER Vertex array indices
GL_PIXEL_PACK_BUFFER Pixel read target
GL_PIXEL_UNPACK_BUFFER Texture data source
GL_SHADER_STORAGE_BUFFER Read-write storage for shaders
GL_TEXTURE_BUFFER Texture data buffer
GL_TRANSFORM_FEEDBACK_BUFFER Transform feedback buffer
GL_UNIFORM_BUFFER Uniform block storage
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 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_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, GL_PIXEL_PACK_BUFFER,GL_PIXEL_UNPACK_READ_BUFFER, GL_TRANSFORM_FEEDBACK_BUFFER and GL_UNIFORM_BUFFER targets are available only if the GL ES version is 3.0 or greater.

The GL_ATOMIC_COUNTER_BUFFER, GL_DISPATCH_INDIRECT_BUFFER, GL_DRAW_INDIRECT_BUFFER and GL_SHADER_STORAGE_BUFFER targets are available only if the GL ES version is 3.1 or greater.

The GL_TEXTURE_BUFFER target is available only if the GL ES version is 3.2 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 flag.

API Version Support

OpenGL ES API Version
Function Name 2.0 3.0 3.1 3.2
glFlushMappedBufferRange - ✔ ✔ ✔
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