Fixed Issue 173: Adjust gamma, brightness and contrast

Added com.sun.opengl.util.Gamma supporting adjusting of gamma,
brightness, and contrast. API and implementation derived from code in
the LWJGL project. Added demos.gamma.TestGamma demo illustrating how
to use the APIs. Tested on Linux, Mac OS X and Windows. No Solaris
support at this time, although future Solaris releases, being based on
the Xorg server, will probably have support for the required
XF86VidMode extension.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@557 232f8b59-042b-4e1e-8c03-345bb8c30851

3 files changed, 31 insertions, 0 deletions

diff --git a/make/stub_includes/opengl/macosx-window-system.h b/make/stub_includes/opengl/macosx-window-system.h
index 46ee1c45d..3eb6ce514 100644
--- a/make/stub_includes/opengl/macosx-window-system.h
+++ b/make/stub_includes/opengl/macosx-window-system.h
@@ -44,3 +44,7 @@ void setContextTextureImageToPBuffer(void* nsContext, void* pBuffer, int colorBu
 void* getProcAddress(const char *procName);
 
 void setSwapInterval(void* nsContext, int interval);
+
+/* Gamma-related functionality */
+Bool setGammaRamp(int tableSize, float* redRamp, float* greenRamp, float* blueRamp);
+void resetGammaRamp();
diff --git a/make/stub_includes/win32/wingdi.h b/make/stub_includes/win32/wingdi.h
index 35f754178..4d980755b 100644
--- a/make/stub_includes/win32/wingdi.h
+++ b/make/stub_includes/win32/wingdi.h
@@ -210,3 +210,7 @@ WINUSERAPI BOOL WINAPI ShowWindow(HWND hWnd, int nCmdShow);
 WINUSERAPI HDC  WINAPI GetDC(HWND);
 WINUSERAPI int  WINAPI ReleaseDC(HWND hWnd, HDC hDC);
 WINUSERAPI BOOL WINAPI DestroyWindow(HWND hWnd);
+
+// Routines for changing gamma ramp of display device
+WINGDIAPI BOOL        WINAPI GetDeviceGammaRamp(HDC,LPVOID);
+WINGDIAPI BOOL        WINAPI SetDeviceGammaRamp(HDC,LPVOID);
diff --git a/make/stub_includes/x11/window-system.c b/make/stub_includes/x11/window-system.c
index 6af85eeb9..00b474899 100644
--- a/make/stub_includes/x11/window-system.c
+++ b/make/stub_includes/x11/window-system.c
@@ -35,3 +35,26 @@ extern int XFreePixmap(
     Display*		/* display */,
     Pixmap		/* pixmap */
 );
+
+// Routines for changing gamma settings.
+// Note that these are not currently supported on Solaris.
+Bool XF86VidModeGetGammaRampSize(
+    Display *display,
+    int screen,
+    int* size);
+
+Bool XF86VidModeGetGammaRamp(
+    Display *display,
+    int screen,
+    int size,
+    unsigned short *red_array,
+    unsigned short *green_array,
+    unsigned short *blue_array);
+
+Bool XF86VidModeSetGammaRamp(
+    Display *display,
+    int screen,
+    int size,
+    unsigned short *red_array,
+    unsigned short *green_array,
+    unsigned short *blue_array);