glgetinternalformativ(3g) [debian man page]
GLGETINTERNALFORMATI(3G) [FIXME: manual] GLGETINTERNALFORMATI(3G) NAME
glGetInternalFormativ - retrieve information about implementation-dependent support for internal formats C SPECIFICATION
void glGetInternalFormativ(GLenum target, GLenum internalformat, GLenum pname, GLsizei bufSize, GLint *params); PARAMETERS
target Indicates the usage of the internal format. target must be GL_RENDERBUFFER, GL_TEXTURE_2D_MULTISAMPLE or GL_TEXTURE_2D_MULTISAMPLE_ARRAY. internalformat Specifies the internal format about which to retrieve information. pname Specifies the type of information to query. bufSize Specifies the maximum number of basic machine units that may be written to params by the function. params Specifies the address of a variable into which to write the retrieved information. DESCRIPTION
glGetInternalFormativ retrieves information about implementation-dependent support for internal formats. target indicates the target with which the internal format will be used and must be one of GL_RENDERBUFFER, GL_TEXTURE_2D_MULTISAMPLE, or GL_TEXTURE_2D_MULTISAMPLE_ARRAY, corresponding to usage as a renderbuffer, two-dimensional multisample texture or two-dimensional multisample array texture, respectively. internalformat specifies the internal format about which to retrieve information and must be a color-renderable, depth-renderable or stencil-renderable format. The information retrieved will be written to memory addressed by the pointer specified in params. No more than bufSize basic machine units will be written to this memory. If pname is GL_NUM_SAMPLE_COUNTS, the number of sample counts that would be returned by querying GL_SAMPLES will be returned in params. If pname is GL_SAMPLES, the sample counts supported for internalformat and target are written into params in descending numeric order. Only positive values are returned. Querying GL_SAMPLES with bufSize of one will return just the maximum supported number of samples for this format. The maximum value in GL_SAMPLES is guaranteed to be at least the lowest of the following: o The value of GL_MAX_INTEGER_SAMPLES if internalformat is a signed or unsigned integer format..RE o The value of GL_MAX_DEPTH_TEXTURE_SAMPLES if internalformat is a depth- or stencil-renderable format and target is GL_TEXTURE_2D_MULTISAMPLE, GL_TEXTURE_2D_MULTISAMPLE_ARRAY..RE o The value of GL_MAX_COLOR_TEXTURE_SAMPLES if internalformat is a color-renderable format and target is GL_TEXTURE_2D_MULTISAMPLE or GL_TEXTURE_2D_MULTISAMPLE_ARRAY..RE o The value of GL_MAX_SAMPLES..RE NOTES
glGetInternalFormativ is available only if the GL version is 4.2 or higher. ERRORS
GL_INVALID_VALUE is generated if bufSize is negative. GL_INVALID_ENUM is generated if pname is not GL_SAMPLES or GL_NUM_SAMPLE_COUNTS. GL_INVALID_ENUM is generated if internalformat is not color-, depth-, or stencil-renderable. GL_INVALID_ENUM is generated if target is not one of GL_TEXTURE_2D_MULTISAMPLE, GL_TEXTURE_2D_MULTISAMPLE_ARRAY or GL_RENDERBUFFER. SEE ALSO
glGet() COPYRIGHT
Copyright (C) 2011 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. [FIXME: source] 05/30/2012 GLGETINTERNALFORMATI(3G)
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GLTEXIMAGE2DMULTISAM(3G) OpenGL 3.3 GLTEXIMAGE2DMULTISAM(3G) NAME
glTexImage2DMultisample - 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. SEE ALSO
glTexImage3D(), glTexImage2DMultisample() COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. OpenGL 3.3 03/08/2011 GLTEXIMAGE2DMULTISAM(3G)