VertexShaderManager: Add stereoscopy options to swap the left and right eye.

4 files changed, 9 insertions, 2 deletions

diff --git a/Source/Core/DolphinWX/VideoConfigDiag.cpp b/Source/Core/DolphinWX/VideoConfigDiag.cpp
index 9b8b70b5d5..78be8c208e 100644
--- a/Source/Core/DolphinWX/VideoConfigDiag.cpp
+++ b/Source/Core/DolphinWX/VideoConfigDiag.cpp
@@ -152,6 +152,7 @@ static wxString shader_errors_desc = wxTRANSLATE("Usually if shader compilation
 static wxString stereo_3d_desc = wxTRANSLATE("Side-by-side stereoscopic 3D.");
 static wxString stereo_separation_desc = wxTRANSLATE("Control the Interpupillary distance.");
 static wxString stereo_focal_desc = wxTRANSLATE("Control the distance at which objects appear to be at screen depth.");
+static wxString stereo_swap_desc = wxTRANSLATE("Swap the left and right eye.\n\nIf unsure, leave this unchecked.");
 
 
 #if !defined(__APPLE__)
@@ -470,6 +471,8 @@ VideoConfigDiag::VideoConfigDiag(wxWindow* parent, const std::string &title, con
 		szr_stereo->Add(new wxStaticText(page_enh, wxID_ANY, _("Focal Length:")), 1, wxALIGN_CENTER_VERTICAL, 0);
 		szr_stereo->Add(foc_slider, 1, wxEXPAND | wxRIGHT);
 
+		szr_stereo->Add(CreateCheckBox(page_enh, _("Swap eyes"), wxGetTranslation(stereo_swap_desc), vconfig.bStereoSwapEyes));
+
 		wxStaticBoxSizer* const group_stereo = new wxStaticBoxSizer(wxVERTICAL, page_enh, _("Stereoscopy"));
 		group_stereo->Add(szr_stereo, 1, wxEXPAND | wxLEFT | wxRIGHT | wxBOTTOM, 5);
 		szr_enh_main->Add(group_stereo, 0, wxEXPAND | wxALL, 5);
diff --git a/Source/Core/VideoCommon/VertexShaderManager.cpp b/Source/Core/VideoCommon/VertexShaderManager.cpp
index ad69ba4362..150bd783a8 100644
--- a/Source/Core/VideoCommon/VertexShaderManager.cpp
+++ b/Source/Core/VideoCommon/VertexShaderManager.cpp
@@ -516,8 +516,8 @@ void VertexShaderManager::SetConstants()
 		if (g_ActiveConfig.iStereoMode > 0 && xfmem.projection.type == GX_PERSPECTIVE)
 		{
 			float offset = g_ActiveConfig.iStereoSeparation / (200.0f * g_ActiveConfig.iStereoFocalLength);
-			constants.stereooffset[0] = offset;
-			constants.stereooffset[1] = -offset;
+			constants.stereooffset[0] = (g_ActiveConfig.bStereoSwapEyes) ? -offset : offset;
+			constants.stereooffset[1] = (g_ActiveConfig.bStereoSwapEyes) ? offset : -offset;
 		}
 		else
 		{
diff --git a/Source/Core/VideoCommon/VideoConfig.cpp b/Source/Core/VideoCommon/VideoConfig.cpp
index 18e098652d..4bcb2051f0 100644
--- a/Source/Core/VideoCommon/VideoConfig.cpp
+++ b/Source/Core/VideoCommon/VideoConfig.cpp
@@ -69,6 +69,7 @@ void VideoConfig::Load(const std::string& ini_file)
 	settings->Get("StereoMode", &iStereoMode, 0);
 	settings->Get("StereoSeparation", &iStereoSeparation, 65);
 	settings->Get("StereoFocalLength", &iStereoFocalLength, 100);
+	settings->Get("StereoSwapEyes", &bStereoSwapEyes, false);
 	settings->Get("EnablePixelLighting", &bEnablePixelLighting, 0);
 	settings->Get("FastDepthCalc", &bFastDepthCalc, true);
 	settings->Get("MSAA", &iMultisampleMode, 0);
@@ -143,6 +144,7 @@ void VideoConfig::GameIniLoad()
 	CHECK_SETTING("Video_Settings", "StereoMode", iStereoMode);
 	CHECK_SETTING("Video_Settings", "StereoSeparation", iStereoSeparation);
 	CHECK_SETTING("Video_Settings", "StereoFocalLength", iStereoFocalLength);
+	CHECK_SETTING("Video_Settings", "StereoSwapEyes", bStereoSwapEyes);
 	CHECK_SETTING("Video_Settings", "EnablePixelLighting", bEnablePixelLighting);
 	CHECK_SETTING("Video_Settings", "FastDepthCalc", bFastDepthCalc);
 	CHECK_SETTING("Video_Settings", "MSAA", iMultisampleMode);
@@ -234,6 +236,7 @@ void VideoConfig::Save(const std::string& ini_file)
 	settings->Set("StereoMode", iStereoMode);
 	settings->Set("StereoSeparation", iStereoSeparation);
 	settings->Set("StereoFocalLength", iStereoFocalLength);
+	settings->Set("StereoSwapEyes", bStereoSwapEyes);
 	settings->Set("EnablePixelLighting", bEnablePixelLighting);
 	settings->Set("FastDepthCalc", bFastDepthCalc);
 	settings->Set("ShowEFBCopyRegions", bShowEFBCopyRegions);
diff --git a/Source/Core/VideoCommon/VideoConfig.h b/Source/Core/VideoCommon/VideoConfig.h
index 2eec352021..a03e70bdc6 100644
--- a/Source/Core/VideoCommon/VideoConfig.h
+++ b/Source/Core/VideoCommon/VideoConfig.h
@@ -81,6 +81,7 @@ struct VideoConfig final
 	int iStereoMode;
 	int iStereoSeparation;
 	int iStereoFocalLength;
+	bool bStereoSwapEyes;
 
 	// Information
 	bool bShowFPS;