Add crossview support (#7361)

5 files changed, 10 insertions, 6 deletions

diff --git a/builtin/settingtypes.txt b/builtin/settingtypes.txt
index 84059c25f..51797f7de 100644
--- a/builtin/settingtypes.txt
+++ b/builtin/settingtypes.txt
@@ -621,9 +621,10 @@ fall_bobbing_amount (Fall bobbing factor) float 0.0
 #    -    interlaced: odd/even line based polarisation screen support.
 #    -    topbottom: split screen top/bottom.
 #    -    sidebyside: split screen side by side.
+#    -    crossview: Cross-eyed 3d
 #    -    pageflip: quadbuffer based 3d.
 #    Note that the interlaced mode requires shaders to be enabled.
-3d_mode (3D mode) enum none none,anaglyph,interlaced,topbottom,sidebyside,pageflip
+3d_mode (3D mode) enum none none,anaglyph,interlaced,topbottom,sidebyside,crossview,pageflip
 
 #    In-game chat console height, between 0.1 (10%) and 1.0 (100%).
 console_height (Console height) float 0.6 0.1 1.0
diff --git a/src/client/render/factory.cpp b/src/client/render/factory.cpp
index 410ceaad7..3aabc5db9 100644
--- a/src/client/render/factory.cpp
+++ b/src/client/render/factory.cpp
@@ -41,5 +41,7 @@ RenderingCore *createRenderingCore(const std::string &stereo_mode, IrrlichtDevic
 		return new RenderingCoreSideBySide(device, client, hud);
 	if (stereo_mode == "topbottom")
 		return new RenderingCoreSideBySide(device, client, hud, true);
+	if (stereo_mode == "crossview")
+		return new RenderingCoreSideBySide(device, client, hud, false, true);
 	throw std::invalid_argument("Invalid rendering mode: " + stereo_mode);
 }
diff --git a/src/client/render/sidebyside.cpp b/src/client/render/sidebyside.cpp
index 9b1e06d4a..ed08810db 100644
--- a/src/client/render/sidebyside.cpp
+++ b/src/client/render/sidebyside.cpp
@@ -23,8 +23,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "client/hud.h"
 
 RenderingCoreSideBySide::RenderingCoreSideBySide(
-	IrrlichtDevice *_device, Client *_client, Hud *_hud, bool _horizontal)
-	: RenderingCoreStereo(_device, _client, _hud), horizontal(_horizontal)
+	IrrlichtDevice *_device, Client *_client, Hud *_hud, bool _horizontal, bool _flipped)
+	: RenderingCoreStereo(_device, _client, _hud), horizontal(_horizontal), flipped(_flipped)
 {
 }
 
@@ -62,7 +62,7 @@ void RenderingCoreSideBySide::drawAll()
 void RenderingCoreSideBySide::useEye(bool _right)
 {
 	driver->setRenderTarget(_right ? right : left, true, true, skycolor);
-	RenderingCoreStereo::useEye(_right);
+	RenderingCoreStereo::useEye(_right ^ flipped);
 }
 
 void RenderingCoreSideBySide::resetEye()
diff --git a/src/client/render/sidebyside.h b/src/client/render/sidebyside.h
index b5cf9d5db..f8ed256b3 100644
--- a/src/client/render/sidebyside.h
+++ b/src/client/render/sidebyside.h
@@ -27,6 +27,7 @@ protected:
 	video::ITexture *left = nullptr;
 	video::ITexture *right = nullptr;
 	bool horizontal = false;
+	bool flipped = false;
 	core::dimension2du image_size;
 	v2s32 rpos;
 
@@ -37,6 +38,6 @@ protected:
 
 public:
 	RenderingCoreSideBySide(IrrlichtDevice *_device, Client *_client, Hud *_hud,
-			bool _horizontal = false);
+			bool _horizontal = false, bool _flipped = false);
 	void drawAll() override;
 };
diff --git a/src/settings_translation_file.cpp b/src/settings_translation_file.cpp
index ec0c0db6b..f94bfb3f2 100644
--- a/src/settings_translation_file.cpp
+++ b/src/settings_translation_file.cpp
@@ -286,7 +286,7 @@ fake_function() {
 	gettext("Fall bobbing factor");
 	gettext("Multiplier for fall bobbing.\nFor example: 0 for no view bobbing; 1.0 for normal; 2.0 for double.");
 	gettext("3D mode");
-	gettext("3D support.\nCurrently supported:\n-    none: no 3d output.\n-    anaglyph: cyan/magenta color 3d.\n-    interlaced: odd/even line based polarisation screen support.\n-    topbottom: split screen top/bottom.\n-    sidebyside: split screen side by side.\n-    pageflip: quadbuffer based 3d.\nNote that the interlaced mode requires shaders to be enabled.");
+	gettext("3D support.\nCurrently supported:\n-    none: no 3d output.\n-    anaglyph: cyan/magenta color 3d.\n-    interlaced: odd/even line based polarisation screen support.\n-    topbottom: split screen top/bottom.\n-    sidebyside: split screen side by side.\n-    crossview: cross-eyed 3d viewing.\n-    pageflip: quadbuffer based 3d.\nNote that the interlaced mode requires shaders to be enabled.");
 	gettext("Console height");
 	gettext("In-game chat console height, between 0.1 (10%) and 1.0 (100%).");
 	gettext("Console color");