Camilla Berglund
ago%!(EXTRA string=15 years)
parent
ffba674dbf
commit
2630d4968c
16 changed files with 647 additions and 31 deletions
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//========================================================================
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// GLFW - An OpenGL framework
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// Platform: Any
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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 <math.h> |
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#include <string.h> |
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//////////////////////////////////////////////////////////////////////////
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////// GLFW public API //////
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//////////////////////////////////////////////////////////////////////////
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//========================================================================
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// Calculate the gamma ramp table from specified values
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//========================================================================
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GLFWAPI void glfwSetGammaFormula(float gamma, float blacklevel, float gain) |
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{ |
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int i, size = 256; |
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GLFWgammaramp ramp; |
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if (!_glfwInitialized) |
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{ |
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_glfwSetError(GLFW_NOT_INITIALIZED); |
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return; |
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} |
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for (i = 0; i < size; i++) |
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{ |
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float value = (float) i / ((float) (size - 1)); |
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// Apply gamma
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value = pow(value, gamma) * 65535.f + 0.5f; |
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// Apply gain
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value = gain * (value - 32767.5f) + 32767.5f; |
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// Apply black-level
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value += blacklevel * 65535.f; |
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// Clamp values
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if (value < 0.f) |
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value = 0.f; |
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else if (value > 65535.f) |
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value = 65535.f; |
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// Set the gamma ramp values
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ramp.red[i] = (unsigned short) value; |
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ramp.green[i] = (unsigned short) value; |
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ramp.blue[i] = (unsigned short) value; |
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} |
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glfwSetGammaRamp(&ramp); |
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} |
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//========================================================================
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// Return the currently set gamma ramp
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//========================================================================
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GLFWAPI void glfwGetGammaRamp(GLFWgammaramp* ramp) |
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{ |
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if (!_glfwInitialized) |
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{ |
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_glfwSetError(GLFW_NOT_INITIALIZED); |
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return; |
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} |
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*ramp = _glfwLibrary.currentRamp; |
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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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GLFWAPI void glfwSetGammaRamp(const GLFWgammaramp* ramp) |
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{ |
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if (!_glfwInitialized) |
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{ |
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_glfwSetError(GLFW_NOT_INITIALIZED); |
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return; |
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} |
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_glfwPlatformSetGammaRamp(ramp); |
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_glfwLibrary.currentRamp = *ramp; |
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} |
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@ -0,0 +1,67 @@ |
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//========================================================================
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// GLFW - An OpenGL framework
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// Platform: Win32/WGL
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// API version: 2.7
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// WWW: http://www.glfw.org/
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2010 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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//************************************************************************
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//**** GLFW internal functions ****
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//************************************************************************
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//========================================================================
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// Save the gamma ramp to our internal copy
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//========================================================================
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void _glfwPlatformSaveGammaRamp(int ramp) |
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{ |
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if (!_glfwLibrary.gammaSize) |
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{ |
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return; |
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} |
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_glfw_GetDeviceGammaRamp(_glfwLibrary.Win32.desktopDC, |
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_glfwLibrary.gammaRamp[ramp]); |
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} |
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//========================================================================
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// Restore the gamma ramp to our internal copy of the gamma ramp
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//========================================================================
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void _glfwPlatformRestoreGammaRamp(int ramp) |
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{ |
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if (!_glfwLibrary.gammaSize) |
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{ |
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return; |
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} |
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_glfw_SetDeviceGammaRamp(_glfwLibrary.Win32.desktopDC, |
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_glfwLibrary.gammaRamp[ramp]); |
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} |
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@ -0,0 +1,124 @@ |
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//========================================================================
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// GLFW - An OpenGL framework
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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 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 _glfwPlatformSaveGammaRamp(void) |
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{ |
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if (_glfwLibrary.X11.XRandR.available && |
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!_glfwLibrary.X11.XRandR.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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memcpy(_glfwLibrary.originalRamp.red, gamma->red, size); |
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memcpy(_glfwLibrary.originalRamp.green, gamma->green, size); |
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memcpy(_glfwLibrary.originalRamp.blue, gamma->blue, size); |
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XRRFreeGamma(gamma); |
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XRRFreeScreenResources(rr); |
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} |
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#endif |
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else if (_glfwLibrary.X11.XF86VidMode.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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_glfwLibrary.originalRamp.red, |
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_glfwLibrary.originalRamp.green, |
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_glfwLibrary.originalRamp.blue); |
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#endif |
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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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if (_glfwLibrary.X11.XRandR.available && |
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!_glfwLibrary.X11.XRandR.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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} |
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#endif |
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else if (_glfwLibrary.X11.XF86VidMode.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 |
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} |
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} |
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@ -0,0 +1,178 @@ |
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//========================================================================
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// Gamma correction test program
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// Copyright (c) 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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//
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// This program is used to test the gamma correction functionality for
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// both fullscreen and windowed mode windows
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//
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//========================================================================
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#include <GL/glfw3.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "getopt.h" |
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static GLfloat ggamma = 1.0f; |
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static GLfloat ggain = 1.0f; |
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static GLfloat gblacklevel = 0.0f; |
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static void usage(void) |
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{ |
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printf("Usage: gammatest [-h] [-f]\n"); |
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} |
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static void key_callback(GLFWwindow window, int key, int action) |
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{ |
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if (action != GLFW_PRESS) |
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return; |
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switch (key) |
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{ |
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case GLFW_KEY_ESC: |
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glfwCloseWindow(window); |
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break; |
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case 'Q': |
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ggamma += 0.1f; |
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printf("Gamma: %f\n", ggamma); |
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glfwSetGammaFormula( ggamma, gblacklevel, ggain ); |
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break; |
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case 'W': |
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ggamma -= 0.1f; |
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printf("Gamma: %f\n", ggamma); |
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glfwSetGammaFormula( ggamma, gblacklevel, ggain ); |
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break; |
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case 'A': |
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ggain += 0.1f; |
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printf("Gain: %f\n", ggain); |
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glfwSetGammaFormula( ggamma, gblacklevel, ggain ); |
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break; |
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case 'S': |
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ggain -= 0.1f; |
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printf("Gain: %f\n", ggain); |
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glfwSetGammaFormula( ggamma, gblacklevel, ggain ); |
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break; |
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case 'Z': |
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gblacklevel += 0.1f; |
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printf("Black Level: %f\n", gblacklevel); |
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glfwSetGammaFormula( ggamma, gblacklevel, ggain ); |
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break; |
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case 'X': |
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gblacklevel -= 0.1f; |
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printf("Black Level: %f\n", gblacklevel); |
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glfwSetGammaFormula( ggamma, gblacklevel, ggain ); |
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break; |
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} |
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} |
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static void size_callback(GLFWwindow window, int width, int height) |
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{ |
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glViewport(0, 0, width, height); |
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} |
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int main(int argc, char** argv) |
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{ |
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int width, height, ch; |
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int mode = GLFW_WINDOWED; |
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GLFWwindow window; |
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while ((ch = getopt(argc, argv, "fh")) != -1) |
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{ |
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switch (ch) |
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{ |
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case 'h': |
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usage(); |
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exit(EXIT_SUCCESS); |
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case 'f': |
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mode = GLFW_FULLSCREEN; |
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break; |
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default: |
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usage(); |
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exit(EXIT_FAILURE); |
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} |
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} |
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if (!glfwInit()) |
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{ |
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fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError())); |
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exit(EXIT_FAILURE); |
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} |
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if (mode == GLFW_FULLSCREEN) |
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{ |
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GLFWvidmode mode; |
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glfwGetDesktopMode(&mode); |
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width = mode.width; |
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height = mode.height; |
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} |
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else |
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{ |
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width = 0; |
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height = 0; |
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} |
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window = glfwOpenWindow(width, height, mode, "Gamma Test", NULL); |
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if (!window) |
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{ |
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glfwTerminate(); |
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fprintf(stderr, "Failed to open GLFW window: %s\n", glfwErrorString(glfwGetError())); |
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exit(EXIT_FAILURE); |
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} |
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printf("Gamma: %f\nGain: %f\nBlack Level: %f\n", |
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ggamma, ggain, gblacklevel); |
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glfwSwapInterval(1); |
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glfwSetKeyCallback(window, key_callback); |
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glfwSetWindowSizeCallback(window, size_callback); |
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glEnable(GL_SCISSOR_TEST); |
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while (glfwIsWindow(window)) |
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{ |
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int width, height; |
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glfwGetWindowSize(window, &width, &height); |
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glScissor(0, 0, width, height); |
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glClearColor(0.5f, 0.5f, 0.5f, 0); |
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glClear(GL_COLOR_BUFFER_BIT); |
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glScissor(0, 0, 640, 480); |
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glClearColor(0.8f, 0.2f, 0.4f, 0); |
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glClear(GL_COLOR_BUFFER_BIT); |
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glfwSwapBuffers(); |
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glfwPollEvents(); |
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} |
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glfwTerminate(); |
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exit(EXIT_SUCCESS); |
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} |
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