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