added vid_stereobuffer cvar based on patch from syschuck on the alientrap forums

[xonotic/darkplaces.git] / vid_shared.c

diff --git a/vid_shared.c b/vid_shared.c
index 6a9292ec2e5cc1d815471030305a587f59d16b64..8bd1851e23c86a725d200fe65314838db28f44ea 100644 (file)
--- a/vid_shared.c
+++ b/vid_shared.c
@@ -71,6 +71,7 @@ cvar_t vid_width = {CVAR_SAVE, "vid_width", "640", "resolution"};
 cvar_t vid_height = {CVAR_SAVE, "vid_height", "480", "resolution"};
 cvar_t vid_bitsperpixel = {CVAR_SAVE, "vid_bitsperpixel", "32", "how many bits per pixel to render at (32 or 16, 32 is recommended)"};
 cvar_t vid_refreshrate = {CVAR_SAVE, "vid_refreshrate", "60", "refresh rate to use, in hz (higher values flicker less, if supported by your monitor)"};
+cvar_t vid_stereobuffer = {CVAR_SAVE, "vid_stereobuffer", "0", "enables 'quad-buffered' stereo rendering for stereo shutterglasses, HMD (head mounted display) devices, or polarized stereo LCDs, if supported by your drivers"};
 
 cvar_t vid_vsync = {CVAR_SAVE, "vid_vsync", "0", "sync to vertical blank, prevents 'tearing' (seeing part of one frame and part of another on the screen at the same time), automatically disabled when doing timedemo benchmarks"};
 cvar_t vid_mouse = {CVAR_SAVE, "vid_mouse", "1", "whether to use the mouse in windowed mode (fullscreen always does)"};
@@ -885,6 +886,7 @@ void VID_Shared_Init(void)
        Cvar_RegisterVariable(&vid_height);
        Cvar_RegisterVariable(&vid_bitsperpixel);
        Cvar_RegisterVariable(&vid_refreshrate);
+       Cvar_RegisterVariable(&vid_stereobuffer);
        Cvar_RegisterVariable(&vid_vsync);
        Cvar_RegisterVariable(&vid_mouse);
        Cvar_RegisterVariable(&vid_minwidth);
@@ -897,21 +899,23 @@ void VID_Shared_Init(void)
                Cvar_Set("gl_combine", "0");
 }
 
-int VID_Mode(int fullscreen, int width, int height, int bpp, int refreshrate)
+int VID_Mode(int fullscreen, int width, int height, int bpp, int refreshrate, int stereobuffer)
 {
-       Con_Printf("Video: %s %dx%dx%dx%dhz\n", fullscreen ? "fullscreen" : "window", width, height, bpp, refreshrate);
-       if (VID_InitMode(fullscreen, width, height, bpp, refreshrate))
+       Con_Printf("Video: %s %dx%dx%dx%dhz%s\n", fullscreen ? "fullscreen" : "window", width, height, bpp, refreshrate, stereobuffer ? " stereo" : "");
+       if (VID_InitMode(fullscreen, width, height, bpp, refreshrate, stereobuffer))
        {
                vid.fullscreen = fullscreen;
                vid.width = width;
                vid.height = height;
                vid.bitsperpixel = bpp;
                vid.refreshrate = refreshrate;
+               vid.stereobuffer = stereobuffer;
                Cvar_SetValueQuick(&vid_fullscreen, fullscreen);
                Cvar_SetValueQuick(&vid_width, width);
                Cvar_SetValueQuick(&vid_height, height);
                Cvar_SetValueQuick(&vid_bitsperpixel, bpp);
                Cvar_SetValueQuick(&vid_refreshrate, refreshrate);
+               Cvar_SetValueQuick(&vid_stereobuffer, stereobuffer);
                return true;
        }
        else
@@ -943,10 +947,10 @@ void VID_Restart_f(void)
                vid_fullscreen.integer ? "fullscreen" : "window", vid_width.integer, vid_height.integer, vid_bitsperpixel.integer);
        VID_CloseSystems();
        VID_Shutdown();
-       if (!VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_refreshrate.integer))
+       if (!VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_refreshrate.integer, vid_stereobuffer.integer))
        {
                Con_Print("Video mode change failed\n");
-               if (!VID_Mode(vid.fullscreen, vid.width, vid.height, vid.bitsperpixel, vid.refreshrate))
+               if (!VID_Mode(vid.fullscreen, vid.width, vid.height, vid.bitsperpixel, vid.refreshrate, vid.stereobuffer))
                        Sys_Error("Unable to restore to last working video mode");
        }
        VID_OpenSystems();
@@ -988,17 +992,19 @@ void VID_Start(void)
        }
 
        Con_Print("Starting video system\n");
-       success = VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_refreshrate.integer);
+       success = VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_refreshrate.integer, vid_stereobuffer.integer);
        if (!success)
        {
                Con_Print("Desired video mode fail, trying fallbacks...\n");
-               success = VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, 60);
+               success = VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, 60, vid_stereobuffer.integer);
+               if (!success && vid_stereobuffer.integer)
+                       success = VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, vid_bitsperpixel.integer, vid_refreshrate.integer, false);
                if (!success && vid_bitsperpixel.integer > 16)
-                       success = VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, 16, 60);
+                       success = VID_Mode(vid_fullscreen.integer, vid_width.integer, vid_height.integer, 16, 60, false);
                if (!success && (vid_width.integer > 640 || vid_height.integer > 480))
-                       success = VID_Mode(vid_fullscreen.integer, 640, 480, 16, 60);
+                       success = VID_Mode(vid_fullscreen.integer, 640, 480, 16, 60, false);
                if (!success && vid_fullscreen.integer)
-                       success = VID_Mode(false, 640, 480, 16, 60);
+                       success = VID_Mode(false, 640, 480, 16, 60, false);
                if (!success)
                        Sys_Error("Video modes failed");
        }