#include <gl_utils.h>
Definition at line 33 of file gl_utils.h.
◆ SetSwapInterval()
static int GL_UTILS::SetSwapInterval |
( |
int |
aVal | ) |
|
|
inlinestatic |
Attempts to set the OpenGL swap interval.
- Parameters
-
aVal | if -1 = try to set adaptive swapping, 0 = sync off, 1 = sync with VSYNC rate. |
- Returns
- actual value set
This routine is written for Linux using X11 only. The equivalent functions under Windows would include <wglext.h> and call wglSwapIntervalEXT
Definition at line 42 of file gl_utils.h.
46 #if defined( __linux__ ) && !defined( KICAD_USE_EGL ) 48 Display *dpy = glXGetCurrentDisplay();
49 GLXDrawable drawable = glXGetCurrentDrawable();
50 std::string vendor( reinterpret_cast<const char*>( glGetString( GL_VENDOR ) ) );
51 bool is_mesa = ( vendor.find(
"Mesa" ) != std::string::npos );
53 if( !is_mesa && glXSwapIntervalEXT && glXQueryDrawable && dpy && drawable )
55 std::string exts( glXQueryExtensionsString( dpy, DefaultScreen( dpy ) ) );
59 if( exts.find(
"GLX_EXT_swap_control_tear" ) == std::string::npos )
69 unsigned lateSwapsEnabled = 0;
70 glXQueryDrawable( dpy, drawable, GLX_LATE_SWAPS_TEAR_EXT, &lateSwapsEnabled );
72 if( !lateSwapsEnabled )
79 unsigned clampedInterval;
80 glXSwapIntervalEXT( dpy, drawable, aVal );
81 glXQueryDrawable( dpy, drawable, GLX_SWAP_INTERVAL_EXT, &clampedInterval );
83 return clampedInterval;
86 if( glXSwapIntervalMESA &&glXGetSwapIntervalMESA )
91 glXSwapIntervalMESA( aVal );
92 return glXGetSwapIntervalMESA();
95 if( glXSwapIntervalSGI )
100 if( glXSwapIntervalSGI( aVal ) )
101 glXSwapIntervalSGI( 1 );
106 return std::numeric_limits<int>::max();
Referenced by KIGFX::OPENGL_GAL::init(), and EDA_3D_CANVAS::initializeOpenGL().
The documentation for this class was generated from the following file: