GlDepthMask: Difference between revisions

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(Created page with "'''_glDepthMask:''' enable or disable writing into the depth buffer {{PageSyntax}} :: SUB _glDepthMask (BYVAL flag AS _UNSIGNED _BYTE) :: void '''_glDepthMask'''(GLboolean {{Parameter|flag}}); ; flag : Specifies whether the depth buffer is enabled for writing. If {{Parameter|flag}} is {{KW|_GL_FALSE}}, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled. {{PageDescription}} '''_glDepthMask''' specifies whether...")
 
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'''_glDepthMask:''' enable or disable writing into the depth buffer
{{DISPLAYTITLE:_glDepthMask}}
The '''_glDepthMask''' statement enables or disables writing into the depth buffer.




{{PageSyntax}}
{{PageSyntax}}
: '''_glDepthMask''' GLboolean {{Parameter|flag}}


::  SUB _glDepthMask (BYVAL flag AS _UNSIGNED _BYTE)
::  void '''_glDepthMask'''(GLboolean {{Parameter|flag}});


 
{{PageParameters}}
; flag
* OpenGL is using its own set of variable types to describe its command parameters.
: Specifies whether the depth buffer is enabled for writing. If {{Parameter|flag}} is {{KW|_GL_FALSE}}, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.
* Use the following table to find the respective QB64 [[Variable Types]].
{{TextStart}}
  '''OpenGL'''    |    '''C/C++'''        |        '''QB64'''
------------+------------------+----------------------
GLenum      |  unsigned int    |  [[_UNSIGNED]] [[LONG]]
GLboolean  |  unsigned char  |  [[_UNSIGNED]] [[_BYTE]]
GLbitfield  |  unsigned int    |  [[_UNSIGNED]] [[LONG]]
GLbyte      |  signed char    |  [[_BYTE]]
GLshort    |  short          |  [[INTEGER]]
GLint      |  int            |  [[LONG]]
GLsizei    |  int            |  [[LONG]]
GLubyte    |  unsigned char  |  [[_UNSIGNED]] [[_BYTE]]
GLushort    |  unsigned short  |  [[_UNSIGNED]] [[INTEGER]]
GLuint      |  unsigned int    |  [[_UNSIGNED]] [[LONG]]
GLfloat    |  float          |  [[SINGLE]]
GLclampf    |  float          |  [[SINGLE]]
GLdouble    |  double          |  [[DOUBLE]]
GLclampd    |  double          |  [[DOUBLE]]
GLvoid      |  void            |  no parameters used
{{TextEnd}}




{{PageDescription}}
{{PageDescription}}
 
* OpenGL's documentation is available in several places, so we won't reproduce it here for another time.
'''_glDepthMask''' specifies whether the depth buffer is enabled for writing. If {{Parameter|flag}} is {{KW|_GL_FALSE}}, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.
* The full description for this command can be found at [https://docs.microsoft.com/en-us/windows/win32/opengl/gldepthmask Microsoft Docs] and is also valid for QB64 usage.
 
 
{{PageUseWith}}
 
{{KW|_glGet}} with argument {{KW|_GL_DEPTH_WRITEMASK}}
 
 
{{PageNotes}}
 
Even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled. In order to unconditionally write to the depth buffer, the depth test should be enabled and set to {{KW|_GL_ALWAYS}} (see {{KW|_glDepthFunc}}).




{{PageSeeAlso}}
{{PageSeeAlso}}
* [[_GL|SUB _GL]]


[[_GL|SUB _GL]]
{{KW|_glColorMask}}, {{KW|_glClearBuffer}}, {{KW|_glDepthFunc}}, {{KW|_glDepthRange}}, {{KW|_glStencilMask}}


{{PageNavigation}}


{{PageCopyright}}
[[Category:Final]]

Revision as of 16:56, 14 July 2022

The _glDepthMask statement enables or disables writing into the depth buffer.


Syntax

_glDepthMask GLboolean flag


Parameters

  • OpenGL is using its own set of variable types to describe its command parameters.
  • Use the following table to find the respective QB64 Variable Types.
  OpenGL     |     C/C++        |        QB64
 ------------+------------------+----------------------
 GLenum      |  unsigned int    |  _UNSIGNED LONG
 GLboolean   |  unsigned char   |  _UNSIGNED _BYTE
 GLbitfield  |  unsigned int    |  _UNSIGNED LONG
 GLbyte      |  signed char     |  _BYTE
 GLshort     |  short           |  INTEGER
 GLint       |  int             |  LONG
 GLsizei     |  int             |  LONG
 GLubyte     |  unsigned char   |  _UNSIGNED _BYTE
 GLushort    |  unsigned short  |  _UNSIGNED INTEGER
 GLuint      |  unsigned int    |  _UNSIGNED LONG
 GLfloat     |  float           |  SINGLE
 GLclampf    |  float           |  SINGLE
 GLdouble    |  double          |  DOUBLE
 GLclampd    |  double          |  DOUBLE
 GLvoid      |  void            |  no parameters used


Description

  • OpenGL's documentation is available in several places, so we won't reproduce it here for another time.
  • The full description for this command can be found at Microsoft Docs and is also valid for QB64 usage.


See also



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