| //======================================================================== |
| // GLFW 3.0 X11 - 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 internal API ////// |
| ////////////////////////////////////////////////////////////////////////// |
| |
| // Detect gamma ramp support |
| // |
| void _glfwInitGammaRamp(void) |
| { |
| // RandR gamma support is only available with version 1.2 and above |
| if (_glfw.x11.randr.available && |
| (_glfw.x11.randr.versionMajor > 1 || |
| (_glfw.x11.randr.versionMajor == 1 && |
| _glfw.x11.randr.versionMinor >= 2))) |
| { |
| // FIXME: Assumes that all monitors have the same size gamma tables |
| // This is reasonable as I suspect the that if they did differ, it |
| // would imply that setting the gamma size to an arbitary size is |
| // possible as well. |
| XRRScreenResources* rr = XRRGetScreenResources(_glfw.x11.display, |
| _glfw.x11.root); |
| |
| if (XRRGetCrtcGammaSize(_glfw.x11.display, rr->crtcs[0]) == 0) |
| { |
| // This is probably older Nvidia RandR with broken gamma support |
| // Flag it as useless and try Xf86VidMode below, if available |
| _glfw.x11.randr.gammaBroken = GL_TRUE; |
| } |
| |
| XRRFreeScreenResources(rr); |
| } |
| } |
| |
| |
| ////////////////////////////////////////////////////////////////////////// |
| ////// GLFW platform API ////// |
| ////////////////////////////////////////////////////////////////////////// |
| |
| void _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp) |
| { |
| if (_glfw.x11.randr.available && !_glfw.x11.randr.gammaBroken) |
| { |
| const size_t size = XRRGetCrtcGammaSize(_glfw.x11.display, |
| monitor->x11.crtc); |
| XRRCrtcGamma* gamma = XRRGetCrtcGamma(_glfw.x11.display, |
| monitor->x11.crtc); |
| |
| _glfwAllocGammaArrays(ramp, size); |
| |
| memcpy(ramp->red, gamma->red, size * sizeof(unsigned short)); |
| memcpy(ramp->green, gamma->green, size * sizeof(unsigned short)); |
| memcpy(ramp->blue, gamma->blue, size * sizeof(unsigned short)); |
| |
| XRRFreeGamma(gamma); |
| } |
| else if (_glfw.x11.vidmode.available) |
| { |
| int size; |
| XF86VidModeGetGammaRampSize(_glfw.x11.display, _glfw.x11.screen, &size); |
| |
| _glfwAllocGammaArrays(ramp, size); |
| |
| XF86VidModeGetGammaRamp(_glfw.x11.display, |
| _glfw.x11.screen, |
| ramp->size, ramp->red, ramp->green, ramp->blue); |
| } |
| } |
| |
| void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp) |
| { |
| if (_glfw.x11.randr.available && !_glfw.x11.randr.gammaBroken) |
| { |
| XRRCrtcGamma* gamma = XRRAllocGamma(ramp->size); |
| |
| memcpy(gamma->red, ramp->red, ramp->size * sizeof(unsigned short)); |
| memcpy(gamma->green, ramp->green, ramp->size * sizeof(unsigned short)); |
| memcpy(gamma->blue, ramp->blue, ramp->size * sizeof(unsigned short)); |
| |
| XRRSetCrtcGamma(_glfw.x11.display, monitor->x11.crtc, gamma); |
| XRRFreeGamma(gamma); |
| } |
| else if (_glfw.x11.vidmode.available) |
| { |
| XF86VidModeSetGammaRamp(_glfw.x11.display, |
| _glfw.x11.screen, |
| ramp->size, |
| (unsigned short*) ramp->red, |
| (unsigned short*) ramp->green, |
| (unsigned short*) ramp->blue); |
| } |
| } |
| |