1 files changed, 10 insertions, 0 deletions

diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp
index 8b7f17601..254f6e2c3 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp
@@ -29,9 +29,15 @@ out gl_PerVertex {
 
 out vec4 position;
 
+layout (std140) uniform vs_config {
+    vec4 viewport_flip;
+};
+
 void main() {
     exec_shader();
 
+    // Viewport can be flipped, which is unsupported by glViewport
+    position.xy *= viewport_flip.xy;
     gl_Position = position;
 }
 )";
@@ -52,6 +58,10 @@ ProgramResult GenerateFragmentShader(const ShaderSetup& setup, const MaxwellFSCo
 in vec4 position;
 out vec4 color;
 
+layout (std140) uniform fs_config {
+    vec4 viewport_flip;
+};
+
 uniform sampler2D tex[32];
 
 void main() {