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98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
//========================================================================
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// GLFW - An OpenGL library
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// Platform: Cocoa/NSOpenGL
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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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#include <ApplicationServices/ApplicationServices.h>
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//************************************************************************
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//**** GLFW internal functions ****
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//************************************************************************
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//========================================================================
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// Save the original gamma ramp so that we can restore it later
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//========================================================================
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void _glfwPlatformGetGammaRamp(GLFWgammaramp* ramp)
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{
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uint32_t sampleCount;
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int i;
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CGGammaValue red[GLFW_GAMMA_RAMP_SIZE];
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CGGammaValue green[GLFW_GAMMA_RAMP_SIZE];
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CGGammaValue blue[GLFW_GAMMA_RAMP_SIZE];
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// For now, don't support anything that is not GLFW_GAMMA_RAMP_SIZE
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if (_glfwLibrary.originalRampSize != GLFW_GAMMA_RAMP_SIZE)
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return;
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CGGetDisplayTransferByTable(CGMainDisplayID(), GLFW_GAMMA_RAMP_SIZE, red, green, blue,
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&sampleCount);
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for (i = 0; i < GLFW_GAMMA_RAMP_SIZE; i++)
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{
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ramp->red[i] = red[i] * 65535;
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ramp->green[i] = green[i] * 65535;
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ramp->blue[i] = blue[i] * 65535;
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}
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}
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//========================================================================
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// Make the specified gamma ramp current
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//========================================================================
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void _glfwPlatformSetGammaRamp(const GLFWgammaramp* ramp)
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{
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int i;
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int size = GLFW_GAMMA_RAMP_SIZE;
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CGGammaValue red[GLFW_GAMMA_RAMP_SIZE];
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CGGammaValue green[GLFW_GAMMA_RAMP_SIZE];
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CGGammaValue blue[GLFW_GAMMA_RAMP_SIZE];
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// For now, don't support anything that is not GLFW_GAMMA_RAMP_SIZE
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if (_glfwLibrary.originalRampSize != GLFW_GAMMA_RAMP_SIZE)
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return;
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// Convert to float & take the difference of the original gamma and
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// the linear function.
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for (i = 0; i < size; i++)
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{
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red[i] = ramp->red[i] / 65535.f;
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green[i] = ramp->green[i] / 65535.f;
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blue[i] = ramp->blue[i] / 65535.f;
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}
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CGSetDisplayTransferByTable(CGMainDisplayID(), GLFW_GAMMA_RAMP_SIZE, red, green, blue);
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}
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