# HG changeset patch
# User John Tsiombikas <nuclear@member.fsf.org>
# Date 1411654444 -10800
# Node ID 3de7339841d0d1d940b31039a571bbec2f970e00
# Parent  b2d902fff68d47559ae86ac22074572cb06676af
option for the null module fallback presentation to show one or both eye views

diff -r b2d902fff68d -r 3de7339841d0 src/vr.c
--- a/src/vr.c	Thu Sep 25 09:06:57 2014 +0300
+++ b/src/vr.c	Thu Sep 25 17:14:04 2014 +0300
@@ -39,6 +39,7 @@
 		set_option_float(defopt, VR_RENDER_RES_SCALE, 1.0);
 		set_option_float(defopt, VR_EYE_HEIGHT, 1.675);
 		set_option_float(defopt, VR_IPD, 0.064);
+		set_option_int(defopt, VR_NULL_STEREO, 0);
 	}
 
 	if(vrm) {
@@ -330,7 +331,7 @@
 
 static void fallback_present(void)
 {
-	int i;
+	int i, show_both = vr_geti(VR_NULL_STEREO);
 
 	glPushAttrib(GL_ENABLE_BIT | GL_TRANSFORM_BIT);
 
@@ -350,8 +351,15 @@
 	glLoadIdentity();
 
 	for(i=0; i<2; i++) {
-		float x0 = i == 0 ? -1 : 0;
-		float x1 = i == 0 ? 0 : 1;
+		float x0, x1;
+
+		if(show_both) {
+			x0 = i == 0 ? -1 : 0;
+			x1 = i == 0 ? 0 : 1;
+		} else {
+			x0 = -1;
+			x1 = 1;
+		}
 
 		glBindTexture(GL_TEXTURE_2D, rtarg[i].tex);
 
@@ -365,6 +373,8 @@
 		glTexCoord2f(rtarg[i].umin, rtarg[i].vmax);
 		glVertex2f(x0, 1);
 		glEnd();
+
+		if(!show_both) break;
 	}
 
 	glPopMatrix();
diff -r b2d902fff68d -r 3de7339841d0 src/vr.h
--- a/src/vr.h	Thu Sep 25 09:06:57 2014 +0300
+++ b/src/vr.h	Thu Sep 25 17:14:04 2014 +0300
@@ -16,6 +16,8 @@
 /* unit: meters */
 #define VR_EYE_HEIGHT		"eye-height"
 #define VR_IPD				"ipd"
+/* misc options */
+#define VR_NULL_STEREO		"null-show-stereo"	/* bool, default 0 */
 
 enum {
 	VR_EYE_LEFT,