Allow shaders with disabled post processing pipeline (#14338)

- Allow disabling of the post processing pipeline while leaving shaders enabled
- Also disable post processing on Android by default

builtin/settingtypes.txt

@@ -401,7 +401,8 @@ anisotropic_filter (Anisotropic filtering) bool false
 #
 #    * None - No antialiasing (default)
 #
-#    * FSAA - Hardware-provided full-screen antialiasing (incompatible with shaders)
+#    * FSAA - Hardware-provided full-screen antialiasing
+#             (incompatible with Post Processing and Undersampling)
 #             A.K.A multi-sample antialiasing (MSAA)
 #             Smoothens out block edges but does not affect the insides of textures.
 #             A restart is required to change this option.
@@ -557,63 +558,68 @@ shadow_sky_body_orbit_tilt (Sky Body Orbit Tilt) float 0.0 -60.0 60.0
 
 [**Post Processing]
 
+#    Enables the post processing pipeline.
+#
+#    Requires: shaders
+enable_post_processing (Enable Post Processing) bool true
+
 #    Enables Hable's 'Uncharted 2' filmic tone mapping.
 #    Simulates the tone curve of photographic film and how this approximates the
 #    appearance of high dynamic range images. Mid-range contrast is slightly
 #    enhanced, highlights and shadows are gradually compressed.
 #
-#    Requires: shaders
+#    Requires: shaders, enable_post_processing
 tone_mapping (Filmic tone mapping) bool false
 
 #    Enable automatic exposure correction
 #    When enabled, the post-processing engine will
 #    automatically adjust to the brightness of the scene,
 #    simulating the behavior of human eye.
 #
-#    Requires: shaders
+#    Requires: shaders, enable_post_processing
 enable_auto_exposure (Enable Automatic Exposure) bool false
 
 #    Set the exposure compensation in EV units.
 #    Value of 0.0 (default) means no exposure compensation.
 #    Range: from -1 to 1.0
 #
-#    Requires: shaders, enable_auto_exposure
+#    Requires: shaders, enable_post_processing, enable_auto_exposure
 exposure_compensation (Exposure compensation) float 0.0 -1.0 1.0
 
 [**Bloom]
 
 #    Set to true to enable bloom effect.
 #    Bright colors will bleed over the neighboring objects.
 #
-#    Requires: shaders
+#    Requires: shaders, enable_post_processing
 enable_bloom (Enable Bloom) bool false
 
 #    Set to true to render debugging breakdown of the bloom effect.
 #    In debug mode, the screen is split into 4 quadrants:
 #    top-left - processed base image, top-right - final image
 #    bottom-left - raw base image, bottom-right - bloom texture.
 #
-#    Requires: shaders, enable_bloom
+#    Requires: shaders, enable_post_processing, enable_bloom
 enable_bloom_debug (Enable Bloom Debug) bool false
 
 #    Defines how much bloom is applied to the rendered image
 #    Smaller values make bloom more subtle
 #    Range: from 0.01 to 1.0, default: 0.05
 #
-#    Requires: shaders, enable_bloom
+#    Requires: shaders, enable_post_processing, enable_bloom
 bloom_intensity (Bloom Intensity) float 0.05 0.01 1.0
 
 #    Defines the magnitude of bloom overexposure.
 #    Range: from 0.1 to 10.0, default: 1.0
 #
-#    Requires: shaders, enable_bloom
+#    Requires: shaders, enable_post_processing, enable_bloom
 bloom_strength_factor (Bloom Strength Factor) float 1.0 0.1 10.0
 
 #    Logical value that controls how far the bloom effect spreads
 #    from the bright objects.
 #    Range: from 0.1 to 8, default: 1
 #
-#    Requires: shaders, enable_bloom
+#    Requires: shaders, enable_post_processing, enable_bloom
 bloom_radius (Bloom Radius) float 1 0.1 8
 
 

src/client/render/plain.cpp

@@ -106,7 +106,7 @@ void UpscaleStep::run(PipelineContext &context)
 std::unique_ptr<RenderStep> create3DStage(Client *client, v2f scale)
 {
 	RenderStep *step = new Draw3D();
-	if (g_settings->getBool("enable_shaders")) {
+	if (g_settings->getBool("enable_shaders") && g_settings->getBool("enable_post_processing")) {
 		RenderPipeline *pipeline = new RenderPipeline();
 		pipeline->addStep(pipeline->own(std::unique_ptr<RenderStep>(step)));
 
@@ -131,7 +131,7 @@ RenderStep* addUpscaling(RenderPipeline *pipeline, RenderStep *previousStep, v2f
 		return previousStep;
 
 	// When shaders are enabled, post-processing pipeline takes care of rescaling
-	if (g_settings->getBool("enable_shaders"))
+	if (g_settings->getBool("enable_shaders") && g_settings->getBool("enable_post_processing"))
 		return previousStep;
 
 

src/defaultsettings.cpp

@@ -248,6 +248,7 @@ void set_default_settings()
 	settings->setDefault("minimap_double_scan_height", "true");
 
 	// Effects
+	settings->setDefault("enable_post_processing", "true");
 	settings->setDefault("directional_colored_fog", "true");
 	settings->setDefault("inventory_items_animations", "false");
 	settings->setDefault("mip_map", "false");
@@ -497,6 +498,7 @@ void set_default_settings()
 	settings->setDefault("active_block_range", "2");
 	settings->setDefault("viewing_range", "50");
 	settings->setDefault("leaves_style", "simple");
+	settings->setDefault("enable_post_processing", "false");
 	settings->setDefault("curl_verify_cert", "false");
 
 	// Apply settings according to screen size