From 5b989f189fbf30535f5509a2157dc755fcb4d8f0 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Thu, 26 Dec 2019 16:38:39 -0300
Subject: gl_rasterizer: Allow rendering without fragment shader

Rendering without a fragment shader is usually used in depth-only
passes.
---
 src/video_core/renderer_opengl/gl_rasterizer.cpp   | 3 +++
 src/video_core/renderer_opengl/gl_shader_manager.h | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index dbb08dd80..672051102 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -271,6 +271,9 @@ void RasterizerOpenGL::SetupShaders(GLenum primitive_mode) {
             case Maxwell::ShaderProgram::Geometry:
                 shader_program_manager->UseTrivialGeometryShader();
                 break;
+            case Maxwell::ShaderProgram::Fragment:
+                shader_program_manager->UseTrivialFragmentShader();
+                break;
             default:
                 break;
             }
diff --git a/src/video_core/renderer_opengl/gl_shader_manager.h b/src/video_core/renderer_opengl/gl_shader_manager.h
index 3703e7018..478c165ce 100644
--- a/src/video_core/renderer_opengl/gl_shader_manager.h
+++ b/src/video_core/renderer_opengl/gl_shader_manager.h
@@ -50,6 +50,10 @@ public:
         current_state.geometry_shader = 0;
     }
 
+    void UseTrivialFragmentShader() {
+        current_state.fragment_shader = 0;
+    }
+
 private:
     struct PipelineState {
         bool operator==(const PipelineState& rhs) const {
-- 
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