Support for Gamma Ramps on Mac OS Classic in both the macrom and macdsp video

 targets, thanks to Gregory Smith!

   Fixes Bugzilla #431.

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402351

src/video/maccommon/SDL_macwm_c.h

@@ -26,3 +26,16 @@
 /* Functions to be exported */
 extern void Mac_SetCaption(_THIS, const char *title, const char *icon);
 
+/*
+ * There's no Carbonized gamma support in Mac OS X, since PBStatusSync() and
+ *  Control() aren't supported in OS X's Carbonlib. Use the Quartz driver
+ *  instead.
+ */
+#define SDL_MACCLASSIC_GAMMA_SUPPORT ((defined(__APPLE__) && defined(__MACH__)) == 0)
+
+#if SDL_MACCLASSIC_GAMMA_SUPPORT
+extern void Mac_QuitGamma(_THIS);
+extern int Mac_SetGammaRamp(_THIS, Uint16 *ramp);
+extern int Mac_GetGammaRamp(_THIS, Uint16 *ramp);
+#endif
+

src/video/macdsp/SDL_dspvideo.c

@@ -297,6 +297,10 @@ static SDL_VideoDevice *DSp_CreateDevice(int devindex)
 	device->UnlockHWSurface = DSp_UnlockHWSurface;
 	device->FlipHWSurface   = DSp_FlipHWSurface;
 	device->FreeHWSurface   = DSp_FreeHWSurface;
+#if SDL_MACCLASSIC_GAMMA_SUPPORT
+	device->SetGammaRamp    = Mac_SetGammaRamp;
+	device->GetGammaRamp    = Mac_GetGammaRamp;
+#endif
 #if SDL_VIDEO_OPENGL
 	device->GL_MakeCurrent  = Mac_GL_MakeCurrent;
 	device->GL_SwapBuffers  = DSp_GL_SwapBuffers;
@@ -1381,6 +1385,10 @@ void DSp_VideoQuit(_THIS)
 	/* Free Palette and restore original */
 	DSp_DestroyPalette (this);
 
+#if SDL_MACCLASSIC_GAMMA_SUPPORT
+	Mac_QuitGamma(this);
+#endif
+
 	/* Free list of video modes */
 	if ( SDL_modelist != NULL ) {
 		for ( i=0; SDL_modelist[i]; i++ ) {

src/video/macrom/SDL_romvideo.c

@@ -158,6 +158,10 @@ static SDL_VideoDevice *ROM_CreateDevice(int devindex)
 	device->UnlockHWSurface = ROM_UnlockHWSurface;
 	device->FlipHWSurface = NULL;
 	device->FreeHWSurface = ROM_FreeHWSurface;
+#if SDL_MACCLASSIC_GAMMA_SUPPORT
+	device->SetGammaRamp = Mac_SetGammaRamp;
+	device->GetGammaRamp = Mac_GetGammaRamp;
+#endif
 #if SDL_VIDEO_OPENGL
 	device->GL_MakeCurrent = Mac_GL_MakeCurrent;
 	device->GL_SwapBuffers = Mac_GL_SwapBuffers;
@@ -725,6 +729,10 @@ void ROM_VideoQuit(_THIS)
 	}
 	RestoreDeviceClut(GetMainDevice());
 
+#if SDL_MACCLASSIC_GAMMA_SUPPORT
+	Mac_QuitGamma(this);
+#endif
+
 	/* Free list of video modes */
 	if ( SDL_modelist != NULL ) {
 		for ( i=0; SDL_modelist[i]; ++i ) {