# glFramebufferParameteri

## Name

glFramebufferParameteri — set a named parameter of a framebuffer

## C Specification

 void glFramebufferParameteri( GLenum target, GLenum pname, GLint param);

## Parameters

target

The target of the operation, which must be GL_READ_FRAMEBUFFER, GL_DRAW_FRAMEBUFFER or GL_FRAMEBUFFER.

pname

A token indicating the parameter to be modified.

param

The new value for the parameter named pname.

## Description

glFramebufferParameteri modifies the current value of the parameter named pname in the framebuffer bound to target. target must be GL_READ_FRAMEBFUFFER, GL_DRAW_FRAMEBUFFER or GL_FRAMEBUFFER. The token GL_FRAMEBUFFER is treated as GL_DRAW_FRAMEBUFFER. A non-default framebuffer must be bound to target.

pname specifies the parameter to be modified. The following symbols are accepted in pname:

GL_FRAMEBUFFER_DEFAULT_WIDTH

param specifies the assumed with for a framebuffer object with no attachments. If a framebuffer has attachments then the width of those attachments is used, otherwise the value of GL_FRAMEBUFFER_DEFAULT_WIDTH is used for the framebuffer. param must be greater than or equal to zero and less than or equal to the value of GL_MAX_FRAMEBUFFER_WIDTH.

GL_FRAMEBUFFER_DEFAULT_HEIGHT

param specifies the assumed height for a framebuffer object with no attachments. If a framebuffer has attachments then the height of those attachments is used, otherwise the value of GL_FRAMEBUFFER_DEFAULT_HEIGHT is used for the framebuffer. param must be greater than or equal to zero and less than or equal to the value of GL_MAX_FRAMEBUFFER_HEIGHT.

GL_FRAMEBUFFER_DEFAULT_SAMPLES

param specifies the assumed number of samples in a framebuffer object with no attachments. If a framebuffer has attachments then the sample count of those attachments is used, otherwise the value of GL_FRAMEBUFFER_DEFAULT_SAMPLES is used for the framebuffer. param must be greater than or equal to zero and less than or equal to the value of GL_MAX_FRAMEBUFFER_SAMPLE.

GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS

param specifies whether the framebuffer should assume identical sample locations and the same number of samples for all texels in the virtual image. If param is zero, then the implementation may vary the position or the count of samples within the virtual image from pixel to pixel, otherwise it will use the same sample position and count for all pixels in the virtual image.

## Errors

GL_INVALID_ENUM is generated if target is not one of the accepted framebuffer targets.

GL_INVALID_VALUE is generated if pname is GL_FRAMEBUFFER_DEFAULT_WIDTH and param is less than zero or greater than the value of GL_MAX_FRAMEBUFFER_WIDTH.

GL_INVALID_VALUE is generated if pname is GL_FRAMEBUFFER_DEFAULT_HEIGHT and param is less than zero or greater than the value of GL_MAX_FRAMEBUFFER_HEIGHT.

GL_INVALID_VALUE is generated if pname is GL_FRAMEBUFFER_DEFAULT_SAMPLES and param is less than zero or greater than the value of GL_MAX_FRAMEBUFFER_SAMPLES.

GL_INVALID_OPERATION is generated if the default framebuffer is bound to target.

## API Version Support

OpenGL ES API Version
Function Name 2.0 3.0 3.1
glFramebufferParameteri - -