Specifies a one-dimensional (1D) texture subimage.
OpenGL C bindings library: libGL.a
void glTexSubImage1D(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels)
|target||Specifies the target texture. Must be GL_TEXTURE_1D.|
|level||Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.|
|xoffset||Specifies a texel offset in the x direction within the texture array.|
|width||Specifies the width of the texture subimage.|
|format||Specifies the format of the pixel data. The following symbolic values are accepted: GL_COLOR_INDEX, GL_RED, GL_GREEN, GL_BLUE,|
|GL_ALPHA, GL_RGB, GL_RGBA, GL_LUMINANCE, and|
|type||Specifies the data type of the pixel data. The following symbolic values are accepted: GL_UNSIGNED_BYTE, GL_BYTE, GL_BITMAP, GL_UNSIGNED_SHORT, GL_SHORT, GL_UNSIGNED_INT, GL_INT, and GL_FLOAT.|
|pixels||Specifies a pointer to the image data in memory.|
Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable or disable one-dimensional texturing, call glEnable and glDisable with argument GL_TEXTURE_1D.
The glTexSubImage1D subroutine redefines a contiguous subregion of an existing one-dimensional texture image. The texels referenced by pixels replace the portion of the existing texture array with x indices xoffset and xoffset + width - 1, inclusive. This region may not include any texels outside the range of the texture array as it was originally specified. It is not an error to specify a subtexture with zero width, but such a specification has no effect.
Texturing has no effect in color index mode.
The glPixelStore and glPixelTransfer modes affect texture images in exactly the way they affect glDrawPixels.
Format of GL_ABGR_EXT is part of the _extname (EXT_abgr) extension, not part of the core GL command set.
GL_INVALID_ENUM is generated if target is not one of the allowable values.
GL_INVALID_OPERATION is generated if the texture array has not been defined by a previous glTexImage1D operation.
GL_INVALID_VALUE is generated if level is less than zero.
GL_INVALID_VALUE may be generated if level is greater than log2(max), where max is the returned value of GL_MAX_TEXTURE_SIZE.
GL_INVALID_VALUE is generated if width < -b, where b is the border width of the texture array.
GL_INVALID_VALUE is generated if xoffset < -b, or if (xoffset + width) > (w - b). Where w is the GL_TEXTURE_WIDTH, and b is the width of the GL_TEXTURE_BORDER of the texture image being modified. Note that w includes twice the border width.
GL_INVALID_ENUM is generated if format is not an accepted format constant.
GL_INVALID_ENUM is generated if type is not a type constant.
GL_INVALID_ENUM is generated if type is GL_BITMAP and format is not GL_COLOR_INDEX.
GL_INVALID_OPERATION is generated if glTexSubImage1D is executed between the execution of glBegin and the corresponding execution of glEnd.
glIsEnabled with argument GL_TEXTURE_1D
The glDrawPixels subroutine, glFog subroutine, glPixelStore subroutine, glPixelTransfer subroutine, glTexEnv subroutine, glTexGen subroutine, glTexImage1D subroutine, glTexParameter subroutine.