Detect depth mode by viewport

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -566,10 +566,8 @@ void RasterizerOpenGL::SyncViewport() {
         if (regs.screen_y_control.y_negate != 0) {
             flip_y = !flip_y;
         }
-        const bool is_zero_to_one = regs.depth_mode == Maxwell::DepthMode::ZeroToOne;
         const GLenum origin = flip_y ? GL_UPPER_LEFT : GL_LOWER_LEFT;
-        const GLenum depth = is_zero_to_one ? GL_ZERO_TO_ONE : GL_NEGATIVE_ONE_TO_ONE;
+        state_tracker.SetOrigin(origin);
-        state_tracker.ClipControl(origin, depth);
         state_tracker.SetYNegate(regs.screen_y_control.y_negate != 0);
     }
 
@@ -593,6 +591,15 @@ void RasterizerOpenGL::SyncViewport() {
             const GLdouble reduce_z = regs.depth_mode == Maxwell::DepthMode::MinusOneToOne;
             const GLdouble near_depth = src.translate_z - src.scale_z * reduce_z;
             const GLdouble far_depth = src.translate_z + src.scale_z;
+            if (i == 0) {
+                const auto& viewports = regs.viewports[i];
+                const GLenum depth = viewports.depth_range_near != src.translate_z &&
+                                             viewports.depth_range_far != src.translate_z
+                                         ? GL_NEGATIVE_ONE_TO_ONE
+                                         : GL_ZERO_TO_ONE;
+                state_tracker.SetDepthMode(depth);
+            }
+
             if (device.HasDepthBufferFloat()) {
                 glDepthRangeIndexeddNV(static_cast<GLuint>(i), near_depth, far_depth);
             } else {

src/video_core/renderer_opengl/gl_state_tracker.h

@@ -112,6 +112,22 @@ public:
         glClipControl(origin, depth);
     }
 
+    void SetOrigin(GLenum new_origin) {
+        if (new_origin == origin) {
+            return;
+        }
+        origin = new_origin;
+        glClipControl(origin, depth);
+    }
+
+    void SetDepthMode(GLenum new_depth) {
+        if (new_depth == depth) {
+            return;
+        }
+        depth = new_depth;
+        glClipControl(origin, depth);
+    }
+
     void SetYNegate(bool new_y_negate) {
         if (new_y_negate == y_negate) {
             return;