mirror of
https://github.com/glfw/glfw.git
synced 2024-11-10 17:01:47 +00:00
127 lines
4.6 KiB
C
127 lines
4.6 KiB
C
//========================================================================
|
|
// GLFW - An OpenGL library
|
|
// Platform: X11/GLX
|
|
// API version: 3.0
|
|
// WWW: http://www.glfw.org/
|
|
//------------------------------------------------------------------------
|
|
// Copyright (c) 2010 Camilla Berglund <elmindreda@elmindreda.org>
|
|
//
|
|
// This software is provided 'as-is', without any express or implied
|
|
// warranty. In no event will the authors be held liable for any damages
|
|
// arising from the use of this software.
|
|
//
|
|
// Permission is granted to anyone to use this software for any purpose,
|
|
// including commercial applications, and to alter it and redistribute it
|
|
// freely, subject to the following restrictions:
|
|
//
|
|
// 1. The origin of this software must not be misrepresented; you must not
|
|
// claim that you wrote the original software. If you use this software
|
|
// in a product, an acknowledgment in the product documentation would
|
|
// be appreciated but is not required.
|
|
//
|
|
// 2. Altered source versions must be plainly marked as such, and must not
|
|
// be misrepresented as being the original software.
|
|
//
|
|
// 3. This notice may not be removed or altered from any source
|
|
// distribution.
|
|
//
|
|
//========================================================================
|
|
|
|
#include "internal.h"
|
|
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////// GLFW platform API //////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
//========================================================================
|
|
// Retrieve the currently set gamma ramp
|
|
//========================================================================
|
|
|
|
void _glfwPlatformGetGammaRamp(GLFWgammaramp* ramp)
|
|
{
|
|
if (_glfwLibrary.X11.RandR.available &&
|
|
!_glfwLibrary.X11.RandR.gammaBroken)
|
|
{
|
|
#if defined (_GLFW_HAS_XRANDR)
|
|
size_t size = GLFW_GAMMA_RAMP_SIZE * sizeof(unsigned short);
|
|
|
|
XRRScreenResources* rr = XRRGetScreenResources(_glfwLibrary.X11.display,
|
|
_glfwLibrary.X11.root);
|
|
|
|
XRRCrtcGamma* gamma = XRRGetCrtcGamma(_glfwLibrary.X11.display,
|
|
rr->crtcs[0]);
|
|
|
|
// TODO: Handle case of original ramp size having a size other than 256
|
|
|
|
memcpy(ramp->red, gamma->red, size);
|
|
memcpy(ramp->green, gamma->green, size);
|
|
memcpy(ramp->blue, gamma->blue, size);
|
|
|
|
XRRFreeGamma(gamma);
|
|
XRRFreeScreenResources(rr);
|
|
#endif /*_GLFW_HAS_XRANDR*/
|
|
}
|
|
else if (_glfwLibrary.X11.VidMode.available)
|
|
{
|
|
#if defined (_GLFW_HAS_XF86VIDMODE)
|
|
XF86VidModeGetGammaRamp(_glfwLibrary.X11.display,
|
|
_glfwLibrary.X11.screen,
|
|
GLFW_GAMMA_RAMP_SIZE,
|
|
ramp->red,
|
|
ramp->green,
|
|
ramp->blue);
|
|
#endif /*_GLFW_HAS_XF86VIDMODE*/
|
|
}
|
|
}
|
|
|
|
|
|
//========================================================================
|
|
// Push the specified gamma ramp to the monitor
|
|
//========================================================================
|
|
|
|
void _glfwPlatformSetGammaRamp(const GLFWgammaramp* ramp)
|
|
{
|
|
if (_glfwLibrary.X11.RandR.available &&
|
|
!_glfwLibrary.X11.RandR.gammaBroken)
|
|
{
|
|
#if defined (_GLFW_HAS_XRANDR)
|
|
int i;
|
|
size_t size = GLFW_GAMMA_RAMP_SIZE * sizeof(unsigned short);
|
|
|
|
XRRScreenResources* rr = XRRGetScreenResources(_glfwLibrary.X11.display,
|
|
_glfwLibrary.X11.root);
|
|
|
|
// Update gamma per monitor
|
|
for (i = 0; i < rr->ncrtc; i++)
|
|
{
|
|
XRRCrtcGamma* gamma = XRRAllocGamma(GLFW_GAMMA_RAMP_SIZE);
|
|
|
|
memcpy(gamma->red, ramp->red, size);
|
|
memcpy(gamma->green, ramp->green, size);
|
|
memcpy(gamma->blue, ramp->blue, size);
|
|
|
|
XRRSetCrtcGamma(_glfwLibrary.X11.display, rr->crtcs[i], gamma);
|
|
XRRFreeGamma(gamma);
|
|
}
|
|
|
|
XRRFreeScreenResources(rr);
|
|
#endif /*_GLFW_HAS_XRANDR*/
|
|
}
|
|
else if (_glfwLibrary.X11.VidMode.available)
|
|
{
|
|
#if defined (_GLFW_HAS_XF86VIDMODE)
|
|
XF86VidModeSetGammaRamp(_glfwLibrary.X11.display,
|
|
_glfwLibrary.X11.screen,
|
|
GLFW_GAMMA_RAMP_SIZE,
|
|
(unsigned short*) ramp->red,
|
|
(unsigned short*) ramp->green,
|
|
(unsigned short*) ramp->blue);
|
|
#endif /*_GLFW_HAS_XF86VIDMODE*/
|
|
}
|
|
}
|
|
|