GLTEXBUFFERRANGE - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]
NAMEglTexBufferRange, glTextureBufferRange − attach a range of a buffer object's data store to a buffer texture object
C SPECIFICATIONvoid glTexBufferRange(GLenum target, GLenum internalformat, GLuint buffer, GLintptr offset, GLsizeiptr size); void glTextureBufferRange(GLuint texture, GLenum internalformat, GLuint buffer, GLintptr offset, GLsizei size);
PARAMETERStarget Specifies the target to which the texture object is bound for glTexBufferRange​. Must be GL_TEXTURE_BUFFER​. texture Specifies the texture object name for glTextureBufferRange​. internalformat Specifies the internal format of the data in the store belonging to buffer​. buffer Specifies the name of the buffer object whose storage to attach to the active buffer texture​. offset Specifies the offset of the start of the range of the buffer's data store to attach​. size Specifies the size of the range of the buffer's data store to attach​.
DESCRIPTIONglTexBufferRange and glTextureBufferRange attach a range of the data store of a specified buffer object to a specified texture object, and specify the storage format for the texture image found in the buffer object​. The texture object must be a buffer texture​. If buffer is zero, any buffer object attached to the buffer texture is detached and no new buffer object is attached​. If buffer is non−zero, it must be the name of an existing buffer object​. The start and size of the range are specified by offset and size respectively, both measured in basic machine units​. offset must be greater than or equal to zero, size must be greater than zero, and the sum of offset and size must not exceed the value of GL_BUFFER_SIZE for buffer​. Furthermore, offset must be an integer multiple of the value of GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT​. internalformat specifies the storage format, and must be one of the following sized internal formats:  ​  ​  ​  ​ Component Sized Internal Format Base Type Components Norm 0 none;'>none;'> 1 2 3 GL_R8 ubyte 1 YES R 0 0 1 GL_R16 ushort 1 YES R 0 0 1 GL_R16F half 1 NO R 0 0 1 GL_R32F float 1 NO R 0 0 1 GL_R8I byte 1 NO R 0 0 1 GL_R16I short 1 NO R 0 0 1 GL_R32I int 1 NO R 0 0 1 GL_R8UI ubyte 1 NO R 0 0 1 GL_R16UI ushort 1 NO R 0 0 1 GL_R32UI uint 1 NO R 0 0 1 GL_RG8 ubyte 2 YES R G 0 1 GL_RG16 ushort 2 YES R G 0 1 GL_RG16F half 2 NO R G 0 1 GL_RG32F float 2 NO R G 0 1 GL_RG8I byte 2 NO R G 0 1 GL_RG16I short 2 NO R G 0 1 GL_RG32I int 2 NO R G 0 1 GL_RG8UI ubyte 2 NO R G 0 1 GL_RG16UI ushort 2 NO R G 0 1 GL_RG32UI uint 2 NO R G 0 1 GL_RGB32F float 3 NO R G B 1 GL_RGB32I int 3 NO R G B 1 GL_RGB32UI uint 3 NO R G B 1 GL_RGBA8 uint 4 YES R G B A GL_RGBA16 short 4 YES R G B A GL_RGBA16F half 4 NO R G B A GL_RGBA32F float 4 NO R G B A GL_RGBA8I byte 4 NO R G B A GL_RGBA16I short 4 NO R G B A GL_RGBA32I int 4 NO R G B A GL_RGBA8UI ubyte 4 NO R G B A GL_RGBA16UI ushort 4 NO R G B A GL_RGBA32UI uint 4 NO R G B A When a range of a buffer object is attached to a buffer texture, the specified range of the buffer object's data store is taken as the texture's texel array​. The number of texels in the buffer texture's texel array is given by $$ \left\lfloor { size \over { components \times sizeof(base\_type) } } \right\rfloor $$ where $components$ and $base\_type$ are the element count and base data type for elements, as specified in the table above​. The number of texels in the texel array is then clamped to the value of the implementation−dependent limit GL_MAX_TEXTURE_BUFFER_SIZE​. When a buffer texture is accessed in a shader, the results of a texel fetch are undefined if the specified texel coordinate is negative, or greater than or equal to the clamped number of texels in the texel array​.
ERRORSGL_INVALID_ENUM is generated by glTexBufferRange if target is not GL_TEXTURE_BUFFER​. GL_INVALID_OPERATION is generated by glTextureBufferRange if texture is not the name of an existing texture object​. GL_INVALID_ENUM is generated by glTextureBufferRange if the effective target of texture is not GL_TEXTURE_BUFFER​. GL_INVALID_ENUM is generated if internalformat is not one of the sized internal formats described above​. GL_INVALID_OPERATION is generated if buffer is not zero and is not the name of an existing buffer object​. GL_INVALID_VALUE is generated if offset is negative, if size is less than or equal to zero, or if offset + size is greater than the value of GL_BUFFER_SIZE for buffer​. GL_INVALID_VALUE is generated if offset is not an integer multiple of the value of GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT​.
ASSOCIATED GETSglGet() with argument GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT glGetTexLevelParameter() with arguments GL_TEXTURE_BUFFER_OFFSET or GL_TEXTURE_BUFFER_SIZE​.
VERSION SUPPORT OpenGL Version Function / Feature Name 2​.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2​.1 3​.0 3​.1 3​.2 3​.3 4​.0 4​.1 4​.2 4​.3 4​.4 4​.5 glTexBufferRange − − − − − − − − − ✔ ✔ ✔ glTextureBufferRange − − − − − − − − − − − ✔
SEE ALSOglTexBuffer()​.
COPYRIGHTCopyright © 2012−2014 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/​.
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