1 files changed, 20 insertions, 4 deletions
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index f0ccc2397..d29049508 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -269,7 +269,8 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
         break;
 
     // Stencil test
-    case PICA_REG_INDEX(output_merger.stencil_test):
+    case PICA_REG_INDEX(output_merger.stencil_test.raw_func):
+    case PICA_REG_INDEX(output_merger.stencil_test.raw_op):
         SyncStencilTest();
         break;
 
@@ -676,7 +677,15 @@ void RasterizerOpenGL::SyncLogicOp() {
 }
 
 void RasterizerOpenGL::SyncStencilTest() {
-    // TODO: Implement stencil test, mask, and op
+    const auto& regs = Pica::g_state.regs;
+    state.stencil.test_enabled = regs.output_merger.stencil_test.enable && regs.framebuffer.depth_format == Pica::Regs::DepthFormat::D24S8;
+    state.stencil.test_func = PicaToGL::CompareFunc(regs.output_merger.stencil_test.func);
+    state.stencil.test_ref = regs.output_merger.stencil_test.reference_value;
+    state.stencil.test_mask = regs.output_merger.stencil_test.input_mask;
+    state.stencil.write_mask = regs.output_merger.stencil_test.write_mask;
+    state.stencil.action_stencil_fail = PicaToGL::StencilOp(regs.output_merger.stencil_test.action_stencil_fail);
+    state.stencil.action_depth_fail = PicaToGL::StencilOp(regs.output_merger.stencil_test.action_depth_fail);
+    state.stencil.action_depth_pass = PicaToGL::StencilOp(regs.output_merger.stencil_test.action_depth_pass);
 }
 
 void RasterizerOpenGL::SyncDepthTest() {
@@ -867,8 +876,15 @@ void RasterizerOpenGL::ReloadDepthBuffer() {
     state.Apply();
 
     glActiveTexture(GL_TEXTURE0);
-    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, fb_depth_texture.width, fb_depth_texture.height,
-                    fb_depth_texture.gl_format, fb_depth_texture.gl_type, temp_fb_depth_buffer.get());
+    if (fb_depth_texture.format == Pica::Regs::DepthFormat::D24S8) {
+        // TODO(Subv): There is a bug with Intel Windows drivers that makes glTexSubImage2D not change the stencil buffer.
+        // The bug has been reported to Intel (https://communities.intel.com/message/324464)
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, fb_depth_texture.width, fb_depth_texture.height, 0,
+            GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, temp_fb_depth_buffer.get());
+    } else {
+        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, fb_depth_texture.width, fb_depth_texture.height,
+            fb_depth_texture.gl_format, fb_depth_texture.gl_type, temp_fb_depth_buffer.get());
+    }
 
     state.texture_units[0].texture_2d = 0;
     state.Apply();