02-04-2008
appending space to variable
Hi
I need to write a script where there the user enters 3 input parameter
variable
number
the program should ask the user left or right
if it is left , the number specified that many spaces should be added to the value in front of the value and saved in the samee variable itself and if it is right that many number of spaces should be added in the right side
for ex
variable = vivek
number =4
and when user echo $variable output should be
if user opts for right then output = (4 spaces in front)vivek
if user opts for left then output =vivek(4 spaces in back)
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LEARN ABOUT MOJAVE
gldrawbuffers
GLDRAWBUFFERS(3G) OpenGL 3.3 GLDRAWBUFFERS(3G)
NAME
glDrawBuffers - Specifies a list of color buffers to be drawn into
C SPECIFICATION
void glDrawBuffers(GLsizei n, const GLenum *bufs);
PARAMETERS
n
Specifies the number of buffers in bufs.
bufs
Points to an array of symbolic constants specifying the buffers into which fragment colors or data values will be written.
DESCRIPTION
glDrawBuffers defines an array of buffers into which outputs from the fragment shader data will be written. If a fragment shader writes a
value to one or more user defined output variables, then the value of each variable will be written into the buffer specified at a location
within bufs corresponding to the location assigned to that user defined output. The draw buffer used for user defined outputs assigned to
locations greater than or equal to n is implicitly set to GL_NONE and any data written to such an output is discarded.
The symbolic constants contained in bufs may be any of the following:
GL_NONE
The fragment shader output value is not written into any color buffer.
GL_FRONT_LEFT
The fragment shader output value is written into the front left color buffer.
GL_FRONT_RIGHT
The fragment shader output value is written into the front right color buffer.
GL_BACK_LEFT
The fragment shader output value is written into the back left color buffer.
GL_BACK_RIGHT
The fragment shader output value is written into the back right color buffer.
GL_COLOR_ATTACHMENTn
The fragment shader output value is written into the nth color attachment of the current framebuffer. n may range from 0 to the value
of GL_MAX_COLOR_ATTACHMENTS.
Except for GL_NONE, the preceding symbolic constants may not appear more than once in bufs. The maximum number of draw buffers supported is
implementation dependent and can be queried by calling glGet() with the argument GL_MAX_DRAW_BUFFERS.
NOTES
The symbolic constants GL_FRONT, GL_BACK, GL_LEFT, GL_RIGHT, and GL_FRONT_AND_BACK are not allowed in the bufs array since they may refer
to multiple buffers.
If a fragment shader does not write to a user defined output variable, the values of the fragment colors following shader execution are
undefined. For each fragment generated in this situation, a different value may be written into each of the buffers specified by bufs.
ERRORS
GL_INVALID_ENUM is generated if one of the values in bufs is not an accepted value.
GL_INVALID_ENUM is generated if the GL is bound to the default framebuffer and one or more of the values in bufs is one of the
GL_COLOR_ATTACHMENTn tokens.
GL_INVALID_ENUM is generated if the GL is bound to a framebuffer object and one or more of the values in bufs is anything other than
GL_NONE or one of the GL_COLOR_ATTACHMENTSn tokens.
GL_INVALID_ENUM is generated if n is less than 0.
GL_INVALID_OPERATION is generated if a symbolic constant other than GL_NONE appears more than once in bufs.
GL_INVALID_OPERATION is generated if any of the entries in bufs (other than GL_NONE ) indicates a color buffer that does not exist in the
current GL context.
GL_INVALID_VALUE is generated if n is greater than GL_MAX_DRAW_BUFFERS.
ASSOCIATED GETS
glGet() with argument GL_MAX_DRAW_BUFFERS
glGet() with argument GL_DRAW_BUFFERi where i indicates the number of the draw buffer whose value is to be queried
SEE ALSO
glBlendFunc(), glColorMask(), glDrawBuffers(), glLogicOp(), glReadBuffer()
COPYRIGHT
Copyright (C) 2003-2005 3Dlabs Inc. Ltd. 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 GLDRAWBUFFERS(3G)