mirror of
https://github.com/glfw/glfw.git
synced 2024-11-25 22:14:34 +00:00
Initial implementation of experimental gamma ramp API.
This commit is contained in:
parent
ffba674dbf
commit
2630d4968c
@ -20,6 +20,7 @@ set(common_SOURCES
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${GLFW_SOURCE_DIR}/src/enable.c
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${GLFW_SOURCE_DIR}/src/error.c
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${GLFW_SOURCE_DIR}/src/fullscreen.c
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${GLFW_SOURCE_DIR}/src/gamma.c
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${GLFW_SOURCE_DIR}/src/glext.c
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${GLFW_SOURCE_DIR}/src/init.c
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${GLFW_SOURCE_DIR}/src/input.c
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@ -67,14 +68,12 @@ if (UNIX AND NOT APPLE AND NOT CYGWIN)
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endif(X11_XRANDR_FOUND)
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# Check for Xf86VidMode (fallback legacy resolution switching extension)
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if (NOT X11_XRANDR_FOUND)
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CHECK_X11_XF86VIDMODE()
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if (X11_XF86VIDMODE_FOUND)
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set(_GLFW_HAS_XF86VIDMODE 1)
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list(APPEND GLFW_INCLUDE_DIR ${X11_XF86VIDMODE_INCLUDE_DIR})
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list(APPEND GLFW_LIBRARIES ${X11_XF86VIDMODE_LIBRARIES})
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endif(X11_XF86VIDMODE_FOUND)
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endif (NOT X11_XRANDR_FOUND)
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CHECK_FUNCTION_EXISTS(glXGetProcAddress _GLFW_HAS_GLXGETPROCADDRESS)
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@ -361,6 +361,8 @@ extern "C" {
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#define GLFW_VERSION_UNAVAILABLE 0x00070007
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#define GLFW_PLATFORM_ERROR 0x00070008
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/* Gamma ramps */
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#define GLFW_GAMMA_RAMP_SIZE 256
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/*************************************************************************
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* Typedefs
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@ -379,6 +381,14 @@ typedef struct
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int greenBits;
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} GLFWvidmode;
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/* Gamma ramp */
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typedef struct
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{
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unsigned short red[GLFW_GAMMA_RAMP_SIZE];
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unsigned short green[GLFW_GAMMA_RAMP_SIZE];
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unsigned short blue[GLFW_GAMMA_RAMP_SIZE];
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} GLFWgammaramp;
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/* Function pointer types */
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typedef void (* GLFWwindowsizefun)(GLFWwindow,int,int);
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typedef int (* GLFWwindowclosefun)(GLFWwindow);
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@ -410,6 +420,11 @@ GLFWAPI const char* glfwErrorString(int error);
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GLFWAPI int glfwGetVideoModes(GLFWvidmode* list, int maxcount);
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GLFWAPI void glfwGetDesktopMode(GLFWvidmode* mode);
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/* Gamma ramp functions */
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GLFWAPI void glfwSetGammaFormula(float gamma, float blacklevel, float gain);
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GLFWAPI void glfwGetGammaRamp(GLFWgammaramp* ramp);
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GLFWAPI void glfwSetGammaRamp(const GLFWgammaramp* ramp);
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/* Window handling */
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GLFWAPI GLFWwindow glfwOpenWindow(int width, int height, int mode, const char* title, GLFWwindow share);
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GLFWAPI void glfwOpenWindowHint(int target, int hint);
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@ -802,6 +802,9 @@ their skills. Special thanks go out to:</p>
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<li>Jonathan Dummer, for submitting a patch fixing an input bug on Win32 and
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adding logic for the <code>GLFW_ICON</code> resource</li>
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<li>Ralph Eastwood, for the initial design of the gamma correction API and
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the Win32 and X11 implementations of it</li>
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<li>Gerald Franz, who made GLFW compile under IRIX, and supplied patches
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for the X11 keyboard translation routine</li>
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115
src/gamma.c
Normal file
115
src/gamma.c
Normal file
@ -0,0 +1,115 @@
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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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@ -222,6 +222,10 @@ struct _GLFWlibrary
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_GLFWwindow* activeWindow;
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_GLFWwindow* cursorLockWindow;
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GLFWgammaramp currentRamp;
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GLFWgammaramp originalRamp;
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int originalRampSize;
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_GLFW_PLATFORM_LIBRARY_STATE;
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};
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@ -257,6 +261,10 @@ void _glfwPlatformDisableSystemKeys(_GLFWwindow* window);
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int _glfwPlatformGetVideoModes(GLFWvidmode* list, int maxcount);
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void _glfwPlatformGetDesktopMode(GLFWvidmode* mode);
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// Gamma ramp
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void _glfwPlatformSaveGammaRamp(void);
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void _glfwPlatformSetGammaRamp(const GLFWgammaramp* ramp);
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// Joystick
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int _glfwPlatformGetJoystickParam(int joy, int param);
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int _glfwPlatformGetJoystickPos(int joy, float* pos, int numaxes);
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@ -23,6 +23,7 @@ set(libglfw_SOURCES
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${common_SOURCES}
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win32_enable.c
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win32_fullscreen.c
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win32_gamma.c
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win32_glext.c
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win32_init.c
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win32_joystick.c
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@ -156,6 +156,8 @@ typedef int (WINAPI * DESCRIBEPIXELFORMAT_T) (HDC,int,UINT,LPPIXELFORMATDESCRIP
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typedef int (WINAPI * GETPIXELFORMAT_T) (HDC);
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typedef BOOL (WINAPI * SETPIXELFORMAT_T) (HDC,int,const PIXELFORMATDESCRIPTOR*);
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typedef BOOL (WINAPI * SWAPBUFFERS_T) (HDC);
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typedef BOOL (WINAPI * GETDEVICEGAMMARAMP_T) (HDC,PVOID);
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typedef BOOL (WINAPI * SETDEVICEGAMMARAMP_T) (HDC,PVOID);
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#endif // _GLFW_NO_DLOAD_GDI32
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// winmm.dll function pointer typedefs
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@ -174,12 +176,16 @@ typedef DWORD (WINAPI * TIMEGETTIME_T) (void);
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#define _glfw_GetPixelFormat _glfwLibrary.Win32.gdi.GetPixelFormat
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#define _glfw_SetPixelFormat _glfwLibrary.Win32.gdi.SetPixelFormat
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#define _glfw_SwapBuffers _glfwLibrary.Win32.gdi.SwapBuffers
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#define _glfw_GetDeviceGammaRamp _glfwLibrary.Win32.gdi.GetDeviceGammaRamp
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#define _glfw_SetDeviceGammaRamp _glfwLibrary.Win32.gdi.SetDeviceGammaRamp
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#else
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#define _glfw_ChoosePixelFormat ChoosePixelFormat
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#define _glfw_DescribePixelFormat DescribePixelFormat
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#define _glfw_GetPixelFormat GetPixelFormat
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#define _glfw_SetPixelFormat SetPixelFormat
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#define _glfw_SwapBuffers SwapBuffers
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#define _glfw_GetDeviceGammaRamp GetDeviceGammaRamp
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#define _glfw_SetDeviceGammaRamp SetDeviceGammaRamp
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#endif // _GLFW_NO_DLOAD_GDI32
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// winmm.dll shortcuts
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@ -264,6 +270,7 @@ typedef struct _GLFWlibraryWin32
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ATOM classAtom; // Window class atom
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HHOOK keyboardHook; // Keyboard hook handle
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DWORD foregroundLockTimeout;
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HDC desktopDC;
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// Default monitor
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struct {
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@ -291,6 +298,8 @@ typedef struct _GLFWlibraryWin32
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GETPIXELFORMAT_T GetPixelFormat;
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SETPIXELFORMAT_T SetPixelFormat;
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SWAPBUFFERS_T SwapBuffers;
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GETDEVICEGAMMARAMP_T GetDeviceGammaRamp;
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SETDEVICEGAMMARAMP_T SetDeviceGammaRamp;
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} gdi;
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#endif // _GLFW_NO_DLOAD_GDI32
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67
src/win32/win32_gamma.c
Normal file
67
src/win32/win32_gamma.c
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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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@ -30,6 +30,8 @@
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#include "internal.h"
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#include <stdlib.h>
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#ifdef __BORLANDC__
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// With the Borland C++ compiler, we want to disable FPU exceptions
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#include <float.h>
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@ -59,12 +61,18 @@ static GLboolean initLibraries(void)
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GetProcAddress(_glfwLibrary.Win32.gdi.instance, "SetPixelFormat");
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_glfwLibrary.Win32.gdi.SwapBuffers = (SWAPBUFFERS_T)
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GetProcAddress(_glfwLibrary.Win32.gdi.instance, "SwapBuffers");
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_glfwLibrary.Win32.gdi.GetDeviceGammaRamp = (GETDEVICEGAMMARAMP_T)
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GetProcAddress(_glfwLibrary.Win32.gdi.instance, "GetDeviceGammaRamp");
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_glfwLibrary.Win32.gdi.SetDeviceGammaRamp = (SETDEVICEGAMMARAMP_T)
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GetProcAddress(_glfwLibrary.Win32.gdi.instance, "SetDeviceGammaRamp");
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if (!_glfwLibrary.Win32.gdi.ChoosePixelFormat ||
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!_glfwLibrary.Win32.gdi.DescribePixelFormat ||
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!_glfwLibrary.Win32.gdi.GetPixelFormat ||
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!_glfwLibrary.Win32.gdi.SetPixelFormat ||
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!_glfwLibrary.Win32.gdi.SwapBuffers)
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!_glfwLibrary.Win32.gdi.SwapBuffers ||
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!_glfwLibrary.Win32.gdi.GetDeviceGammaRamp ||
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!_glfwLibrary.Win32.gdi.SetDeviceGammaRamp)
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{
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return GL_FALSE;
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}
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@ -152,6 +160,19 @@ int _glfwPlatformInit(void)
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_glfwLibrary.Win32.instance = GetModuleHandle(NULL);
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// Initialise the internal gamma ramp
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_glfwLibrary.gammaSize = 256;
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_glfwLibrary.gammaRamp[GLFW_GAMMA_ORIG] =
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malloc(256 * sizeof(unsigned short) * 3);
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_glfwLibrary.gammaRamp[GLFW_GAMMA_CURR] =
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malloc(256 * sizeof(unsigned short) * 3);
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// Get the desktop DC
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_glfwLibrary.Win32.desktopDC = GetDC(GetDesktopWindow());
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// Save the original gamma ramp
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_glfwPlatformSaveGammaRamp(GLFW_GAMMA_ORIG);
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_glfwInitTimer();
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return GL_TRUE;
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@ -164,6 +185,13 @@ int _glfwPlatformInit(void)
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int _glfwPlatformTerminate(void)
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{
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// Restore the original gamma ramp
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_glfwPlatformRestoreGammaRamp(GLFW_GAMMA_ORIG);
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// Free the gamma ramps
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free(_glfwLibrary.gammaRamp[GLFW_GAMMA_ORIG]);
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free(_glfwLibrary.gammaRamp[GLFW_GAMMA_CURR]);
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if (_glfwLibrary.Win32.classAtom)
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{
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UnregisterClass(_GLFW_WNDCLASSNAME, _glfwLibrary.Win32.instance);
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@ -12,6 +12,7 @@ set(libglfw_SOURCES
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${common_SOURCES}
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x11_enable.c
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x11_fullscreen.c
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x11_gamma.c
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x11_glext.c
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x11_init.c
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x11_joystick.c
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|
@ -52,10 +52,6 @@
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#error "GLX header version 1.3 or above is required"
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#endif
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#if defined(_GLFW_HAS_XF86VIDMODE) && defined(_GLFW_HAS_XRANDR)
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#error "Xf86VidMode and RandR extensions cannot both be enabled"
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#endif
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// With XFree86, we can use the XF86VidMode extension
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#if defined(_GLFW_HAS_XF86VIDMODE)
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#include <X11/extensions/xf86vmode.h>
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@ -156,15 +152,18 @@ typedef struct _GLFWlibraryX11
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int glxMajor, glxMinor;
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struct {
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int available;
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GLboolean available;
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int eventBase;
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int errorBase;
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} XF86VidMode;
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struct {
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int available;
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GLboolean available;
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int eventBase;
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int errorBase;
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int majorVersion;
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int minorVersion;
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GLboolean gammaBroken;
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} XRandR;
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// Screensaver data
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@ -179,14 +178,13 @@ typedef struct _GLFWlibraryX11
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// Fullscreen data
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struct {
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int modeChanged;
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#if defined(_GLFW_HAS_XF86VIDMODE)
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XF86VidModeModeInfo oldMode;
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#endif
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#if defined(_GLFW_HAS_XRANDR)
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SizeID oldSizeID;
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int oldWidth;
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int oldHeight;
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Rotation oldRotation;
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#elif defined(_GLFW_HAS_XF86VIDMODE)
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XF86VidModeModeInfo oldMode;
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#endif
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} FS;
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@ -480,7 +480,7 @@ void _glfwPlatformGetDesktopMode(GLFWvidmode* mode)
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{
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Display* dpy;
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int bpp, screen;
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#if defined(_GLFW_HAS_XF86VIDMODE)
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#if !defined(_GLFW_HAS_XRANDR) && defined(_GLFW_HAS_XF86VIDMODE)
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XF86VidModeModeInfo** modelist;
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int modecount;
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#endif
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124
src/x11/x11_gamma.c
Normal file
124
src/x11/x11_gamma.c
Normal file
@ -0,0 +1,124 @@
|
||||
//========================================================================
|
||||
// GLFW - An OpenGL framework
|
||||
// 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 internal functions ****
|
||||
//************************************************************************
|
||||
|
||||
//========================================================================
|
||||
// Save the original gamma ramp so that we can restore it later
|
||||
//========================================================================
|
||||
|
||||
void _glfwPlatformSaveGammaRamp(void)
|
||||
{
|
||||
if (_glfwLibrary.X11.XRandR.available &&
|
||||
!_glfwLibrary.X11.XRandR.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]);
|
||||
|
||||
memcpy(_glfwLibrary.originalRamp.red, gamma->red, size);
|
||||
memcpy(_glfwLibrary.originalRamp.green, gamma->green, size);
|
||||
memcpy(_glfwLibrary.originalRamp.blue, gamma->blue, size);
|
||||
|
||||
XRRFreeGamma(gamma);
|
||||
XRRFreeScreenResources(rr);
|
||||
}
|
||||
#endif
|
||||
else if (_glfwLibrary.X11.XF86VidMode.available)
|
||||
{
|
||||
#if defined (_GLFW_HAS_XF86VIDMODE)
|
||||
XF86VidModeGetGammaRamp(_glfwLibrary.X11.display,
|
||||
_glfwLibrary.X11.screen,
|
||||
GLFW_GAMMA_RAMP_SIZE,
|
||||
_glfwLibrary.originalRamp.red,
|
||||
_glfwLibrary.originalRamp.green,
|
||||
_glfwLibrary.originalRamp.blue);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//========================================================================
|
||||
// Make the specified gamma ramp current
|
||||
//========================================================================
|
||||
|
||||
void _glfwPlatformSetGammaRamp(const GLFWgammaramp* ramp)
|
||||
{
|
||||
if (_glfwLibrary.X11.XRandR.available &&
|
||||
!_glfwLibrary.X11.XRandR.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
|
||||
else if (_glfwLibrary.X11.XF86VidMode.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
|
||||
}
|
||||
}
|
||||
|
@ -31,6 +31,7 @@
|
||||
#include "internal.h"
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
|
||||
//========================================================================
|
||||
@ -62,7 +63,7 @@ static void initLibraries(void)
|
||||
|
||||
|
||||
//========================================================================
|
||||
// Initialize X11 display
|
||||
// Initialize X11 display and look for supported X11 extensions
|
||||
//========================================================================
|
||||
|
||||
static GLboolean initDisplay(void)
|
||||
@ -88,7 +89,7 @@ static GLboolean initDisplay(void)
|
||||
&_glfwLibrary.X11.XF86VidMode.eventBase,
|
||||
&_glfwLibrary.X11.XF86VidMode.errorBase);
|
||||
#else
|
||||
_glfwLibrary.X11.XF86VidMode.available = 0;
|
||||
_glfwLibrary.X11.XF86VidMode.available = GL_FALSE;
|
||||
#endif
|
||||
|
||||
// Check for XRandR extension
|
||||
@ -97,11 +98,17 @@ static GLboolean initDisplay(void)
|
||||
XRRQueryExtension(_glfwLibrary.X11.display,
|
||||
&_glfwLibrary.X11.XRandR.eventBase,
|
||||
&_glfwLibrary.X11.XRandR.errorBase);
|
||||
|
||||
if (!XRRQueryVersion(_glfwLibrary.X11.display,
|
||||
&_glfwLibrary.X11.XRandR.majorVersion,
|
||||
&_glfwLibrary.X11.XRandR.minorVersion))
|
||||
{
|
||||
fprintf(stderr, "Unable to query RandR version number\n");
|
||||
}
|
||||
#else
|
||||
_glfwLibrary.X11.XRandR.available = 0;
|
||||
_glfwLibrary.X11.XRandR.available = GL_FALSE;
|
||||
#endif
|
||||
|
||||
// Fullscreen & screen saver settings
|
||||
// Check if GLX is supported on this display
|
||||
if (!glXQueryExtension(_glfwLibrary.X11.display, NULL, NULL))
|
||||
{
|
||||
@ -123,6 +130,58 @@ static GLboolean initDisplay(void)
|
||||
}
|
||||
|
||||
|
||||
//========================================================================
|
||||
// Detect gamma ramp support and save original gamma ramp, if available
|
||||
//========================================================================
|
||||
|
||||
static void initGammaRamp(void)
|
||||
{
|
||||
#ifdef _GLFW_HAS_XRANDR
|
||||
// RandR gamma support is only available with version 1.2 and above
|
||||
if (_glfwLibrary.X11.XRandR.available &&
|
||||
(_glfwLibrary.X11.XRandR.majorVersion > 1 ||
|
||||
_glfwLibrary.X11.XRandR.majorVersion == 1 &&
|
||||
_glfwLibrary.X11.XRandR.minorVersion >= 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(_glfwLibrary.X11.display,
|
||||
_glfwLibrary.X11.root);
|
||||
|
||||
_glfwLibrary.originalRampSize = XRRGetCrtcGammaSize(_glfwLibrary.X11.display,
|
||||
rr->crtcs[0]);
|
||||
if (!_glfwLibrary.originalRampSize)
|
||||
{
|
||||
// This is probably Nvidia RandR with broken gamma support
|
||||
// Flag it as useless and try Xf86VidMode below, if available
|
||||
_glfwLibrary.X11.XRandR.gammaBroken = GL_TRUE;
|
||||
}
|
||||
|
||||
XRRFreeScreenResources(rr);
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(_GLFW_HAS_XF86VIDMODE)
|
||||
if (_glfwLibrary.X11.XF86VidMode.available &&
|
||||
!_glfwLibrary.originalRampSize)
|
||||
{
|
||||
// Get the gamma size using XF86VidMode
|
||||
XF86VidModeGetGammaRampSize(_glfwLibrary.X11.display,
|
||||
_glfwLibrary.X11.screen,
|
||||
&_glfwLibrary.originalRampSize);
|
||||
}
|
||||
#endif
|
||||
|
||||
if (!_glfwLibrary.originalRampSize)
|
||||
fprintf(stderr, "Gamma ramp setting unsupported\n");
|
||||
|
||||
// Save the original gamma ramp
|
||||
_glfwPlatformSaveGammaRamp();
|
||||
}
|
||||
|
||||
|
||||
//========================================================================
|
||||
// Create a blank cursor (for locked mouse mode)
|
||||
//========================================================================
|
||||
@ -159,8 +218,15 @@ static Cursor createNULLCursor(void)
|
||||
|
||||
static void terminateDisplay(void)
|
||||
{
|
||||
if (_glfwLibrary.originalRampSize)
|
||||
{
|
||||
_glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
|
||||
}
|
||||
|
||||
if (_glfwLibrary.X11.display)
|
||||
{
|
||||
_glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
|
||||
|
||||
XCloseDisplay(_glfwLibrary.X11.display);
|
||||
_glfwLibrary.X11.display = NULL;
|
||||
}
|
||||
@ -180,6 +246,8 @@ int _glfwPlatformInit(void)
|
||||
if (!initDisplay())
|
||||
return GL_FALSE;
|
||||
|
||||
initGammaRamp();
|
||||
|
||||
_glfwLibrary.X11.cursor = createNULLCursor();
|
||||
|
||||
// Try to load libGL.so if necessary
|
||||
@ -232,7 +300,8 @@ const char* _glfwPlatformGetVersionString(void)
|
||||
const char* version = "GLFW " _GLFW_VERSION_FULL
|
||||
#if defined(_GLFW_HAS_XRANDR)
|
||||
" XRandR"
|
||||
#elif defined(_GLFW_HAS_XF86VIDMODE)
|
||||
#endif
|
||||
#if defined(_GLFW_HAS_XF86VIDMODE)
|
||||
" Xf86VidMode"
|
||||
#else
|
||||
" (no mode switching support)"
|
||||
|
@ -6,6 +6,7 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../include ${OPENGL_INCLUDE_DIR}
|
||||
add_executable(defaults defaults.c)
|
||||
add_executable(events events.c)
|
||||
add_executable(fsfocus fsfocus.c)
|
||||
add_executable(gamma gamma.c getopt.c)
|
||||
add_executable(iconify iconify.c getopt.c)
|
||||
add_executable(joysticks joysticks.c)
|
||||
add_executable(listmodes listmodes.c)
|
||||
@ -30,8 +31,8 @@ else()
|
||||
endif(APPLE)
|
||||
|
||||
set(WINDOWS_BINARIES accuracy sharing tearing windows)
|
||||
set(CONSOLE_BINARIES defaults events fsaa fsfocus iconify joysticks listmodes
|
||||
peter reopen version)
|
||||
set(CONSOLE_BINARIES defaults events fsaa fsfocus gamma iconify joysticks
|
||||
listmodes peter reopen version)
|
||||
|
||||
if(MSVC)
|
||||
# Tell MSVC to use main instead of WinMain for Windows subsystem executables
|
||||
|
178
tests/gamma.c
Normal file
178
tests/gamma.c
Normal file
@ -0,0 +1,178 @@
|
||||
//========================================================================
|
||||
// Gamma correction test program
|
||||
// Copyright (c) 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.
|
||||
//
|
||||
//========================================================================
|
||||
//
|
||||
// This program is used to test the gamma correction functionality for
|
||||
// both fullscreen and windowed mode windows
|
||||
//
|
||||
//========================================================================
|
||||
|
||||
#include <GL/glfw3.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "getopt.h"
|
||||
|
||||
static GLfloat ggamma = 1.0f;
|
||||
static GLfloat ggain = 1.0f;
|
||||
static GLfloat gblacklevel = 0.0f;
|
||||
|
||||
static void usage(void)
|
||||
{
|
||||
printf("Usage: gammatest [-h] [-f]\n");
|
||||
}
|
||||
|
||||
static void key_callback(GLFWwindow window, int key, int action)
|
||||
{
|
||||
if (action != GLFW_PRESS)
|
||||
return;
|
||||
|
||||
switch (key)
|
||||
{
|
||||
case GLFW_KEY_ESC:
|
||||
glfwCloseWindow(window);
|
||||
break;
|
||||
case 'Q':
|
||||
ggamma += 0.1f;
|
||||
printf("Gamma: %f\n", ggamma);
|
||||
glfwSetGammaFormula( ggamma, gblacklevel, ggain );
|
||||
break;
|
||||
case 'W':
|
||||
ggamma -= 0.1f;
|
||||
printf("Gamma: %f\n", ggamma);
|
||||
glfwSetGammaFormula( ggamma, gblacklevel, ggain );
|
||||
break;
|
||||
case 'A':
|
||||
ggain += 0.1f;
|
||||
printf("Gain: %f\n", ggain);
|
||||
glfwSetGammaFormula( ggamma, gblacklevel, ggain );
|
||||
break;
|
||||
case 'S':
|
||||
ggain -= 0.1f;
|
||||
printf("Gain: %f\n", ggain);
|
||||
glfwSetGammaFormula( ggamma, gblacklevel, ggain );
|
||||
break;
|
||||
case 'Z':
|
||||
gblacklevel += 0.1f;
|
||||
printf("Black Level: %f\n", gblacklevel);
|
||||
glfwSetGammaFormula( ggamma, gblacklevel, ggain );
|
||||
break;
|
||||
case 'X':
|
||||
gblacklevel -= 0.1f;
|
||||
printf("Black Level: %f\n", gblacklevel);
|
||||
glfwSetGammaFormula( ggamma, gblacklevel, ggain );
|
||||
break;
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
static void size_callback(GLFWwindow window, int width, int height)
|
||||
{
|
||||
glViewport(0, 0, width, height);
|
||||
}
|
||||
|
||||
int main(int argc, char** argv)
|
||||
{
|
||||
int width, height, ch;
|
||||
int mode = GLFW_WINDOWED;
|
||||
GLFWwindow window;
|
||||
|
||||
while ((ch = getopt(argc, argv, "fh")) != -1)
|
||||
{
|
||||
switch (ch)
|
||||
{
|
||||
case 'h':
|
||||
usage();
|
||||
exit(EXIT_SUCCESS);
|
||||
|
||||
case 'f':
|
||||
mode = GLFW_FULLSCREEN;
|
||||
break;
|
||||
|
||||
default:
|
||||
usage();
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
|
||||
if (!glfwInit())
|
||||
{
|
||||
fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError()));
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (mode == GLFW_FULLSCREEN)
|
||||
{
|
||||
GLFWvidmode mode;
|
||||
glfwGetDesktopMode(&mode);
|
||||
width = mode.width;
|
||||
height = mode.height;
|
||||
}
|
||||
else
|
||||
{
|
||||
width = 0;
|
||||
height = 0;
|
||||
}
|
||||
|
||||
window = glfwOpenWindow(width, height, mode, "Gamma Test", NULL);
|
||||
if (!window)
|
||||
{
|
||||
glfwTerminate();
|
||||
|
||||
fprintf(stderr, "Failed to open GLFW window: %s\n", glfwErrorString(glfwGetError()));
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
printf("Gamma: %f\nGain: %f\nBlack Level: %f\n",
|
||||
ggamma, ggain, gblacklevel);
|
||||
|
||||
glfwSwapInterval(1);
|
||||
glfwSetKeyCallback(window, key_callback);
|
||||
glfwSetWindowSizeCallback(window, size_callback);
|
||||
|
||||
glEnable(GL_SCISSOR_TEST);
|
||||
|
||||
while (glfwIsWindow(window))
|
||||
{
|
||||
int width, height;
|
||||
|
||||
glfwGetWindowSize(window, &width, &height);
|
||||
|
||||
glScissor(0, 0, width, height);
|
||||
glClearColor(0.5f, 0.5f, 0.5f, 0);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
glScissor(0, 0, 640, 480);
|
||||
glClearColor(0.8f, 0.2f, 0.4f, 0);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
glfwSwapBuffers();
|
||||
glfwPollEvents();
|
||||
}
|
||||
|
||||
glfwTerminate();
|
||||
exit(EXIT_SUCCESS);
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user