man glTexImage2DMultisample (3): establish the data storage, format, dimensions, and number of samples of a multisample texture's image

C SPECIFICATION

void glTexImage2DMultisample(GLenum target, GLsizei samples, GLint internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);

PARAMETERS

target

: Specifies the target of the operation. target must be GL_TEXTURE_2D_MULTISAMPLE or GL_PROXY_TEXTURE_2D_MULTISAMPLE.

samples

: The number of samples in the multisample texture's image.

internalformat

: The internal format to be used to store the multisample texture's image. internalformat must specify a color-renderable, depth-renderable, or stencil-renderable format.

width

: The width of the multisample texture's image, in texels.

height

: The height of the multisample texture's image, in texels.

fixedsamplelocations

: Specifies whether the image will use identical sample locations and the same number of samples for all texels in the image, and the sample locations will not depend on the internal format or size of the image.

DESCRIPTION

glTexImage2DMultisample establishes the data storage, format, dimensions and number of samples of a multisample texture's image.

target must be GL_TEXTURE_2D_MULTISAMPLE or GL_PROXY_TEXTURE_2D_MULTISAMPLE. width and height are the dimensions in texels of the texture, and must be in the range zero to GL_MAX_TEXTURE_SIZE - 1. samples specifies the number of samples in the image and must be in the range zero to GL_MAX_SAMPLES - 1.

internalformat must be a color-renderable, depth-renderable, or stencil-renderable format.

If fixedsamplelocations is GL_TRUE, the image will use identical sample locations and the same number of samples for all texels in the image, and the sample locations will not depend on the internal format or size of the image.

When a multisample texture is accessed in a shader, the access takes one vector of integers describing which texel to fetch and an integer corresponding to the sample numbers describing which sample within the texel to fetch. No standard sampling instructions are allowed on the multisample texture targets.

NOTES

glTexImage2DMultisample is available only if the GL version is 3.2 or greater.

ERRORS

GL_INVALID_OPERATION is generated if internalformat is a depth- or stencil-renderable format and samples is greater than the value of GL_MAX_DEPTH_TEXTURE_SAMPLES.

GL_INVALID_OPERATION is generated if internalformat is a color-renderable format and samples is greater than the value of GL_MAX_COLOR_TEXTURE_SAMPLES.

GL_INVALID_OPERATION is generated if internalformat is a signed or unsigned integer format and samples is greater than the value of GL_MAX_INTEGER_SAMPLES.

GL_INVALID_VALUE is generated if either width or height negative or is greater than GL_MAX_TEXTURE_SIZE.

GL_INVALID_VALUE is generated if samples is greater than GL_MAX_SAMPLES.

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