OpenGL: flip front faces if Z scale is inverted

4 years ago · 6c926f3cac
1 changed files with 3 additions and 2 deletions
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@ -561,8 +561,9 @@ void RasterizerOpenGL::SyncViewport() {
        flags[Dirty::FrontFace] = false;

        GLenum mode = MaxwellToGL::FrontFace(regs.front_face);
-        if (regs.screen_y_control.triangle_rast_flip != 0 &&
-            regs.viewport_transform[0].scale_y < 0.0f) {
+        if ((regs.screen_y_control.triangle_rast_flip != 0 &&
+             regs.viewport_transform[0].scale_y < 0.0f) ||
+            regs.viewport_transform[0].scale_z < 0.0f) {
            switch (mode) {
            case GL_CW:
                mode = GL_CCW;