Dynamic shadows with the ogles2 driver on OpenGL ES 3.0+ (#16661)

builtin/common/settings/dlg_settings.lua

@@ -355,10 +355,10 @@ local function check_requirements(name, requires, context)
 		return true
 	end
 
-	local video_driver = core.get_active_driver()
 	local touch_support = core.irrlicht_device_supports_touch()
 	local touch_controls = core.settings:get("touch_controls")
 	local touch_interaction_style = core.settings:get("touch_interaction_style")
+	local shadows_support = core.driver_supports_shadows()
 	local special = {
 		android = PLATFORM == "Android",
 		desktop = PLATFORM ~= "Android",
@@ -367,9 +367,8 @@ local function check_requirements(name, requires, context)
 		-- be used, so we show settings for both.
 		touchscreen = touch_support and (touch_controls == "auto" or core.is_yes(touch_controls)),
 		keyboard_mouse = not touch_support or (touch_controls == "auto" or not core.is_yes(touch_controls)),
-		opengl = (video_driver == "opengl" or video_driver == "opengl3"),
-		gles = video_driver:sub(1, 5) == "ogles",
 		touch_interaction_style_tap = touch_interaction_style ~= "buttons_crosshair",
+		shadows_support = shadows_support,
 	}
 
 	for req_key, req_value in pairs(requires) do

builtin/common/settings/shadows_component.lua

@@ -69,7 +69,7 @@ end
 return {
 	query_text = "Shadows",
 	requires = {
-		opengl = true,
+		shadows_support = true,
 	},
 	context = "client",
 	get_formspec = function(self, avail_w)

builtin/settingtypes.txt

@@ -91,8 +91,9 @@
 # * The value of a boolean setting, such as enable_dynamic_shadows
 # * An engine-defined value:
 #     * desktop / android
+#     * touch_support
 #     * touchscreen / keyboard_mouse
-#     * opengl / gles
+#     * shadows_support
 # * You can negate any requirement by prepending with !
 # * The "keyboard_mouse" requirement is automatically added to settings with the
 #   "key" type.
@@ -702,60 +703,60 @@ water_wave_speed (Waving liquids wave speed) float 5.0
 
 #    Set to true to enable Shadow Mapping.
 #
-#    Requires: opengl
+#    Requires: shadows_support
 enable_dynamic_shadows (Dynamic shadows) bool false
 
 #    Set the shadow strength gamma.
 #    Adjusts the intensity of in-game dynamic shadows.
 #    Lower value means lighter shadows, higher value means darker shadows.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_strength_gamma (Shadow strength gamma) float 1.0 0.1 10.0
 
 #    Maximum distance to render shadows.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_map_max_distance (Shadow map max distance in nodes to render shadows) float 140.0 10.0 1000.0
 
 #    Texture size to render the shadow map on.
 #    This must be a power of two.
 #    Bigger numbers create better shadows but it is also more expensive.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_map_texture_size (Shadow map texture size) int 2048 128 8192
 
 #    Sets shadow texture quality to 32 bits.
 #    On false, 16 bits texture will be used.
 #    This can cause much more artifacts in the shadow.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_map_texture_32bit (Shadow map texture in 32 bits) bool true
 
 #    Define shadow filtering quality.
 #    This simulates the soft shadows effect by applying a PCF or Poisson disk
 #    but also uses more resources.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_filters (Shadow filter quality) enum 1 0,1,2
 
 #    Enable colored shadows for transculent nodes.
 #    This is expensive.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_map_color (Colored shadows) bool false
 
 #    Set the soft shadow radius size.
 #    Lower values mean sharper shadows, bigger values mean softer shadows.
 #    Minimum value: 1.0; maximum value: 15.0
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_soft_radius (Soft shadow radius) float 5.0 1.0 15.0
 
 #    Set the default tilt of Sun/Moon orbit in degrees.
 #    Games may change orbit tilt via API.
 #    Value of 0 means no tilt / vertical orbit.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_sky_body_orbit_tilt (Sky Body Orbit Tilt) float 0.0 -60.0 60.0
 
 [**Post Processing]
@@ -2083,14 +2084,14 @@ post_processing_texture_bits (Color depth for post-processing texture) enum 16 8
 #    Enable Poisson disk filtering.
 #    On true uses Poisson disk to make "soft shadows". Otherwise uses PCF filtering.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_poisson_filter (Poisson filtering) bool true
 
 #    Spread a complete update of the shadow map over a given number of frames.
 #    Higher values might make shadows laggy, lower values
 #    will consume more resources.
 #
-#    Requires: enable_dynamic_shadows, opengl
+#    Requires: enable_dynamic_shadows, shadows_support
 shadow_update_frames (Map shadows update frames) int 16 1 32
 
 #    Set to true to render debugging breakdown of the bloom effect.

client/shaders/nodes_shader/opengl_fragment.glsl

@@ -317,7 +317,7 @@ vec4 getShadowColor(sampler2D shadowsampler, vec2 smTexCoord, float realDistance
 
 	int samples = (1 + 1 * int(SOFTSHADOWRADIUS > 1.0)) * PCFSAMPLES; // scale max samples for the soft shadows
 	samples = int(clamp(pow(4.0 * radius + 1.0, 2.0), 1.0, float(samples)));
-	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-samples)));
+	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-float(samples))));
 	int end_offset = int(samples) + init_offset;
 
 	for (int x = init_offset; x < end_offset; x++) {
@@ -325,7 +325,7 @@ vec4 getShadowColor(sampler2D shadowsampler, vec2 smTexCoord, float realDistance
 		visibility += getHardShadowColor(shadowsampler, clampedpos.xy, realDistance);
 	}
 
-	return visibility / samples;
+	return visibility / float(samples);
 }
 
 #else
@@ -344,7 +344,7 @@ float getShadow(sampler2D shadowsampler, vec2 smTexCoord, float realDistance)
 
 	int samples = (1 + 1 * int(SOFTSHADOWRADIUS > 1.0)) * PCFSAMPLES; // scale max samples for the soft shadows
 	samples = int(clamp(pow(4.0 * radius + 1.0, 2.0), 1.0, float(samples)));
-	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-samples)));
+	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-float(samples))));
 	int end_offset = int(samples) + init_offset;
 
 	for (int x = init_offset; x < end_offset; x++) {
@@ -352,7 +352,7 @@ float getShadow(sampler2D shadowsampler, vec2 smTexCoord, float realDistance)
 		visibility += getHardShadow(shadowsampler, clampedpos.xy, realDistance);
 	}
 
-	return visibility / samples;
+	return visibility / float(samples);
 }
 
 #endif
@@ -511,8 +511,8 @@ void main(void)
 		// Apply self-shadowing when light falls at a narrow angle to the surface
 		// Cosine of the cut-off angle.
 		const float self_shadow_cutoff_cosine = 0.035;
-		if (f_normal_length != 0 && cosLight < self_shadow_cutoff_cosine) {
+		if (f_normal_length != 0.0 && cosLight < self_shadow_cutoff_cosine) {
-			shadow_int = max(shadow_int, 1 - clamp(cosLight, 0.0, self_shadow_cutoff_cosine)/self_shadow_cutoff_cosine);
+			shadow_int = max(shadow_int, 1.0 - clamp(cosLight, 0.0, self_shadow_cutoff_cosine)/self_shadow_cutoff_cosine);
 			shadow_color = mix(vec3(0.0), shadow_color, min(cosLight, self_shadow_cutoff_cosine)/self_shadow_cutoff_cosine);
 
 #if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES || MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS)

client/shaders/object_shader/opengl_fragment.glsl

@@ -162,8 +162,8 @@ float getPenumbraRadius(sampler2D shadowsampler, vec2 smTexCoord, float realDist
 	// conversion factor from shadow depth to blur radius
 	float depth_to_blur = f_shadowfar / SOFTSHADOWRADIUS / xyPerspectiveBias0;
 	if (depth > 0.0 && f_normal_length > 0.0)
-		// 5 is empirical factor that controls how fast shadow loses sharpness
+		// 5.0 is empirical factor that controls how fast shadow loses sharpness
-		sharpness_factor = clamp(5 * depth * depth_to_blur, 0.0, 1.0);
+		sharpness_factor = clamp(5.0 * depth * depth_to_blur, 0.0, 1.0);
 	depth = 0.0;
 
 	float world_to_texture = xyPerspectiveBias1 / perspective_factor / perspective_factor
@@ -257,7 +257,7 @@ vec4 getShadowColor(sampler2D shadowsampler, vec2 smTexCoord, float realDistance
 
 	int samples = (1 + 1 * int(SOFTSHADOWRADIUS > 1.0)) * PCFSAMPLES; // scale max samples for the soft shadows
 	samples = int(clamp(pow(4.0 * radius + 1.0, 2.0), 1.0, float(samples)));
-	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-samples)));
+	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-float(samples))));
 	int end_offset = int(samples) + init_offset;
 
 	for (int x = init_offset; x < end_offset; x++) {
@@ -265,7 +265,7 @@ vec4 getShadowColor(sampler2D shadowsampler, vec2 smTexCoord, float realDistance
 		visibility += getHardShadowColor(shadowsampler, clampedpos.xy, realDistance);
 	}
 
-	return visibility / samples;
+	return visibility / float(samples);
 }
 
 #else
@@ -284,7 +284,7 @@ float getShadow(sampler2D shadowsampler, vec2 smTexCoord, float realDistance)
 
 	int samples = (1 + 1 * int(SOFTSHADOWRADIUS > 1.0)) * PCFSAMPLES; // scale max samples for the soft shadows
 	samples = int(clamp(pow(4.0 * radius + 1.0, 2.0), 1.0, float(samples)));
-	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-samples)));
+	int init_offset = int(floor(mod(((smTexCoord.x * 34.0) + 1.0) * smTexCoord.y, 64.0-float(samples))));
 	int end_offset = int(samples) + init_offset;
 
 	for (int x = init_offset; x < end_offset; x++) {
@@ -292,7 +292,7 @@ float getShadow(sampler2D shadowsampler, vec2 smTexCoord, float realDistance)
 		visibility += getHardShadow(shadowsampler, clampedpos.xy, realDistance);
 	}
 
-	return visibility / samples;
+	return visibility / float(samples);
 }
 
 #endif
@@ -426,8 +426,8 @@ void main(void)
 		// Apply self-shadowing when light falls at a narrow angle to the surface
 		// Cosine of the cut-off angle.
 		const float self_shadow_cutoff_cosine = 0.14;
-		if (f_normal_length != 0 && cosLight < self_shadow_cutoff_cosine) {
+		if (f_normal_length != 0.0 && cosLight < self_shadow_cutoff_cosine) {
-			shadow_int = max(shadow_int, 1 - clamp(cosLight, 0.0, self_shadow_cutoff_cosine)/self_shadow_cutoff_cosine);
+			shadow_int = max(shadow_int, 1.0 - clamp(cosLight, 0.0, self_shadow_cutoff_cosine)/self_shadow_cutoff_cosine);
 			shadow_color = mix(vec3(0.0), shadow_color, min(cosLight, self_shadow_cutoff_cosine)/self_shadow_cutoff_cosine);
 		}
 

client/shaders/shadow/pass1/opengl_fragment.glsl

@@ -3,7 +3,7 @@
 #else
 	uniform sampler2D baseTexture;
 #endif
-varying vec4 tPos;
+VARYING_ vec4 tPos;
 
 CENTROID_ VARYING_ mediump vec2 varTexCoord;
 CENTROID_ VARYING_ float varTexLayer; // actually int

client/shaders/shadow/pass1/opengl_vertex.glsl

@@ -1,6 +1,6 @@
 uniform mat4 LightMVP; // world matrix
 uniform vec4 CameraPos; // camera position
-varying vec4 tPos;
+VARYING_ vec4 tPos;
 
 uniform float xyPerspectiveBias0;
 uniform float xyPerspectiveBias1;

client/shaders/shadow/pass1_trans/opengl_fragment.glsl

@@ -3,13 +3,13 @@
 #else
 	uniform sampler2D baseTexture;
 #endif
-varying vec4 tPos;
+VARYING_ vec4 tPos;
 
 CENTROID_ VARYING_ mediump vec2 varTexCoord;
 CENTROID_ VARYING_ float varTexLayer; // actually int
 
 #ifdef COLORED_SHADOWS
-varying vec3 varColor;
+VARYING_ vec3 varColor;
 
 // c_precision of 128 fits within 7 base-10 digits
 const float c_precision = 128.0;

client/shaders/shadow/pass1_trans/opengl_vertex.glsl

@@ -1,8 +1,8 @@
 uniform mat4 LightMVP; // world matrix
 uniform vec4 CameraPos;
-varying vec4 tPos;
+VARYING_ vec4 tPos;
 #ifdef COLORED_SHADOWS
-varying vec3 varColor;
+VARYING_ vec3 varColor;
 #endif
 
 uniform float xyPerspectiveBias0;

client/shaders/shadow/pass2/opengl_fragment.glsl

@@ -4,11 +4,7 @@ uniform sampler2D ShadowMapClientMapTraslucent;
 #endif
 uniform sampler2D ShadowMapSamplerdynamic;
 
-#ifdef GL_ES
+CENTROID_ VARYING_ mediump vec2 varTexCoord;
-varying mediump vec2 varTexCoord;
-#else
-centroid varying vec2 varTexCoord;
-#endif
 
 void main()
 {

client/shaders/shadow/pass2/opengl_vertex.glsl

@@ -1,8 +1,4 @@
-#ifdef GL_ES
+CENTROID_ VARYING_ mediump vec2 varTexCoord;
-varying mediump vec2 varTexCoord;
-#else
-centroid varying vec2 varTexCoord;
-#endif
 
 void main()
 {

irr/include/EDriverFeatures.h

@@ -133,6 +133,11 @@ enum E_VIDEO_DRIVER_FEATURE
 	//! Support for 2D array textures.
 	EVDF_TEXTURE_2D_ARRAY,
 
+	//! Support for floating-point textures as framebuffer color attachments.
+	// (The formats are a. color-renderable and b. part of the required framebuffer formats)
+	// (This refers to at least ECF_R16F, ECF_R32F, ECF_A16B16G16R16F and ECF_A32B32G32R32F)
+	EVDF_RENDER_TO_FLOAT_TEXTURE,
+
 	//! Only used for counting the elements of this enum
 	EVDF_COUNT
 };

irr/src/COpenGLExtensionHandler.cpp

@@ -580,6 +580,8 @@ bool COpenGLExtensionHandler::queryFeature(E_VIDEO_DRIVER_FEATURE feature) const
 		return FeatureAvailable[IRR_NV_depth_clamp] || FeatureAvailable[IRR_ARB_depth_clamp];
 	case EVDF_TEXTURE_MULTISAMPLE:
 		return (Version >= 302) || FeatureAvailable[IRR_ARB_texture_multisample];
+	case EVDF_RENDER_TO_FLOAT_TEXTURE:
+		return Version >= 300;
 
 	default:
 		return false;

irr/src/OpenGL/ExtensionHandler.h

@@ -76,6 +76,8 @@ public:
 			return TextureMultisampleSupported;
 		case EVDF_TEXTURE_2D_ARRAY:
 			return Texture2DArraySupported;
+		case EVDF_RENDER_TO_FLOAT_TEXTURE:
+			return RenderToFloatTextureSupported;
 		default:
 			return false;
 		};
@@ -178,6 +180,7 @@ public:
 	bool TextureMultisampleSupported = false;
 	bool Texture2DArraySupported = false;
 	bool KHRDebugSupported = false;
+	bool RenderToFloatTextureSupported = false;
 	u32 MaxLabelLength = 0;
 };
 

irr/src/OpenGL3/DriverGL3.cpp

@@ -69,10 +69,11 @@ void COpenGL3Driver::initFeatures()
 	LODBiasSupported = true;
 	BlendMinMaxSupported = true;
 	TextureMultisampleSupported = true;
-	Texture2DArraySupported = Version.Major >= 3 || queryExtension("GL_EXT_texture_array");
+	Texture2DArraySupported = true;
 	KHRDebugSupported = isVersionAtLeast(4, 6) || queryExtension("GL_KHR_debug");
 	if (KHRDebugSupported)
 		MaxLabelLength = GetInteger(GL.MAX_LABEL_LENGTH);
+	RenderToFloatTextureSupported = true;
 
 	// COGLESCoreExtensionHandler::Feature
 	static_assert(MATERIAL_MAX_TEXTURES <= 16, "Only up to 16 textures are guaranteed");

irr/src/OpenGLES2/DriverGLES2.cpp

@@ -43,6 +43,7 @@ void COpenGLES2Driver::initFeatures()
 
 	if (Version.Major >= 3) {
 		// NOTE floating-point formats may not be suitable for render targets.
+		// See also EVDF_RENDER_TO_FLOAT_TEXTURE.
 		TextureFormats[ECF_A1R5G5B5] = {GL_RGB5_A1, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, CColorConverter::convert_A1R5G5B5toR5G5B5A1};
 		TextureFormats[ECF_R5G6B5] = {GL_RGB565, GL_RGB, GL_UNSIGNED_SHORT_5_6_5};
 		TextureFormats[ECF_R8G8B8] = {GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE};
@@ -126,6 +127,7 @@ void COpenGLES2Driver::initFeatures()
 	KHRDebugSupported = queryExtension("GL_KHR_debug");
 	if (KHRDebugSupported)
 		MaxLabelLength = GetInteger(GL.MAX_LABEL_LENGTH);
+	RenderToFloatTextureSupported = isVersionAtLeast(3, 2)|| queryExtension("GL_EXT_color_buffer_float");
 
 	// COGLESCoreExtensionHandler::Feature
 	static_assert(MATERIAL_MAX_TEXTURES <= 8, "Only up to 8 textures are guaranteed");

src/client/shadows/dynamicshadowsrender.cpp

@@ -35,7 +35,6 @@ ShadowRenderer::ShadowRenderer(IrrlichtDevice *device, Client *client) :
 
 	m_shadow_map_texture_32bit = g_settings->getBool("shadow_map_texture_32bit");
 	m_shadow_map_colored = g_settings->getBool("shadow_map_color");
-	m_shadow_samples = g_settings->getS32("shadow_filters");
 	m_map_shadow_update_frames = g_settings->getS16("shadow_update_frames");
 
 	m_screen_quad = new ShadowScreenQuad();
@@ -525,10 +524,6 @@ void ShadowRenderer::renderShadowObjects(
 	} // end for caster shadow nodes
 }
 
-void ShadowRenderer::mixShadowsQuad()
-{
-}
-
 void ShadowRenderer::createShaders()
 {
 	auto *shdsrc = m_client->getShaderSource();
@@ -586,9 +581,7 @@ std::unique_ptr<ShadowRenderer> createShadowRenderer(IrrlichtDevice *device, Cli
 		return nullptr;
 
 	// disable if unsupported
-	// See also checks in builtin/mainmenu/settings/dlg_settings.lua
+	if (!ShadowRenderer::isSupported(device)) {
-	const video::E_DRIVER_TYPE type = device->getVideoDriver()->getDriverType();
-	if (type != video::EDT_OPENGL && type != video::EDT_OPENGL3) {
 		warningstream << "Shadows: disabled dynamic shadows due to being unsupported" << std::endl;
 		g_settings->setBool("enable_dynamic_shadows", false);
 		return nullptr;
@@ -598,3 +591,19 @@ std::unique_ptr<ShadowRenderer> createShadowRenderer(IrrlichtDevice *device, Cli
 	shadow_renderer->initialize();
 	return shadow_renderer;
 }
+
+bool ShadowRenderer::isSupported(IrrlichtDevice *device)
+{
+	auto driver = device->getVideoDriver();
+	const video::E_DRIVER_TYPE type = driver->getDriverType();
+	v2s32 glver = driver->getLimits().GLVersion;
+
+	if (type != video::EDT_OPENGL && type != video::EDT_OPENGL3 &&
+			!(type == video::EDT_OGLES2 && glver.X >= 3))
+		return false;
+
+	if (!driver->queryFeature(video::EVDF_RENDER_TO_FLOAT_TEXTURE))
+		return false;
+
+	return true;
+}

src/client/shadows/dynamicshadowsrender.h

@@ -85,7 +85,6 @@ public:
 	void setShadowIntensity(float shadow_intensity);
 	void setShadowTint(video::SColor shadow_tint) { m_shadow_tint = shadow_tint; }
 
-	s32 getShadowSamples() const { return m_shadow_samples; }
 	float getShadowStrength() const { return m_shadows_enabled ? m_shadow_strength : 0.0f; }
 	video::SColor getShadowTint() const { return m_shadow_tint; }
 	float getTimeOfDay() const { return m_time_day; }
@@ -93,6 +92,8 @@ public:
 	f32 getPerspectiveBiasXY() { return m_perspective_bias_xy; }
 	f32 getPerspectiveBiasZ() { return m_perspective_bias_z; }
 
+	static bool isSupported(IrrlichtDevice *device);
+
 private:
 	video::ITexture *getSMTexture(const std::string &shadow_map_name,
 			video::ECOLOR_FORMAT texture_format,
@@ -102,7 +103,6 @@ private:
 			scene::E_SCENE_NODE_RENDER_PASS pass =
 					scene::ESNRP_SOLID);
 	void renderShadowObjects(video::ITexture *target, DirectionalLight &light);
-	void mixShadowsQuad();
 	void updateSMTextures();
 
 	void disable();
@@ -127,7 +127,6 @@ private:
 	float m_shadow_map_max_distance;
 	u32 m_shadow_map_texture_size;
 	float m_time_day;
-	int m_shadow_samples;
 	bool m_shadow_map_texture_32bit;
 	bool m_shadows_enabled;
 	bool m_shadows_supported;

src/defaultsettings.cpp

@@ -336,15 +336,24 @@ void set_default_settings()
 	// Effects Shadows
 	settings->setDefault("enable_dynamic_shadows", "false");
 	settings->setDefault("shadow_strength_gamma", "1.0");
-	settings->setDefault("shadow_map_max_distance", "140.0");
-	settings->setDefault("shadow_map_texture_size", "2048");
-	settings->setDefault("shadow_map_texture_32bit", "true");
-	settings->setDefault("shadow_map_color", "false");
-	settings->setDefault("shadow_filters", "1");
 	settings->setDefault("shadow_poisson_filter", "true");
 	settings->setDefault("shadow_update_frames", "16");
 	settings->setDefault("shadow_soft_radius", "5.0");
 	settings->setDefault("shadow_sky_body_orbit_tilt", "0.0");
+#ifndef __ANDROID__
+	// equivalent to "Medium" preset
+	// see "shadows_component.lua"
+	settings->setDefault("shadow_map_max_distance", "140.0");
+	settings->setDefault("shadow_map_texture_size", "2048");
+	settings->setDefault("shadow_filters", "1");
+#else
+	// equivalent to "Low" preset
+	settings->setDefault("shadow_map_max_distance", "93.0");
+	settings->setDefault("shadow_map_texture_size", "1024");
+	settings->setDefault("shadow_filters", "0");
+#endif
+	settings->setDefault("shadow_map_texture_32bit", "true");
+	settings->setDefault("shadow_map_color", "false");
 
 	// Input
 	settings->setDefault("invert_mouse", "false");

src/script/lua_api/l_menu_common.cpp

@@ -6,6 +6,7 @@
 #include "l_menu_common.h"
 
 #include "client/renderingengine.h"
+#include "client/shadows/dynamicshadowsrender.h"
 #include "gettext.h"
 #include "lua_api/l_internal.h"
 
@@ -28,6 +29,13 @@ int ModApiMenuCommon::l_get_active_driver(lua_State *L)
 }
 
 
+int ModApiMenuCommon::l_driver_supports_shadows(lua_State *L)
+{
+	lua_pushboolean(L, ShadowRenderer::isSupported(RenderingEngine::get_raw_device()));
+	return 1;
+}
+
+
 int ModApiMenuCommon::l_irrlicht_device_supports_touch(lua_State *L)
 {
 	lua_pushboolean(L, RenderingEngine::get_raw_device()->supportsTouchEvents());
@@ -47,6 +55,7 @@ void ModApiMenuCommon::Initialize(lua_State *L, int top)
 {
 	API_FCT(gettext);
 	API_FCT(get_active_driver);
+	API_FCT(driver_supports_shadows);
 	API_FCT(irrlicht_device_supports_touch);
 	API_FCT(normalize_keycode);
 }

src/script/lua_api/l_menu_common.h

@@ -12,6 +12,7 @@ class ModApiMenuCommon: public ModApiBase
 private:
 	static int l_gettext(lua_State *L);
 	static int l_get_active_driver(lua_State *L);
+	static int l_driver_supports_shadows(lua_State *L);
 	static int l_irrlicht_device_supports_touch(lua_State *L);
 	static int l_normalize_keycode(lua_State *L);
 

util/test_singleplayer.sh

@@ -14,20 +14,15 @@ rm -rf "$worldpath"
 mkdir -p "$worldpath/worldmods"
 
 # enable a lot of visual effects so we can catch shader errors and other obvious bugs
-opts1=(
+opts=(
 	screen_w=384 screen_h=256 fps_max=5
 	active_block_range=1 viewing_range=40 helper_mode=devtest
 	opengl_debug=true mip_map=true enable_waving_{leaves,plants,water}=true
 	antialiasing=ssaa node_highlighting=halo
-)
-opts2=(
 	enable_{auto_exposure,bloom,dynamic_shadows,translucent_foliage,volumetric_lighting,water_reflections}=true
 	shadow_map_color=true
 )
-printf '%s\n' "${opts1[@]}" "${clientconf:-}" >"$conf_client"
+printf '%s\n' "${opts[@]}" "${clientconf:-}" >"$conf_client"
-if ! grep -q 'video_driver *= *ogles2' "$conf_client"; then # no shadows on GLES
-	printf '%s\n' "${opts2[@]}" >>"$conf_client"
-fi
 
 ln -s "$dir/helper_mod" "$worldpath/worldmods/"