More fixes to mobile renderer

* Specify all precision qualifiers
* Makes renderer work on Adreno Vulkan

7 files changed, 125 insertions, 108 deletions

diff --git a/servers/rendering/renderer_rd/shader_compiler_rd.cpp b/servers/rendering/renderer_rd/shader_compiler_rd.cpp
index 8aa03b6426..bad37f5c25 100644
--- a/servers/rendering/renderer_rd/shader_compiler_rd.cpp
+++ b/servers/rendering/renderer_rd/shader_compiler_rd.cpp
@@ -213,7 +213,7 @@ static String _interpstr(SL::DataInterpolation p_interp) {
 	return "";
 }
 
-static String _prestr(SL::DataPrecision p_pres) {
+static String _prestr(SL::DataPrecision p_pres, bool p_force_highp = false) {
 	switch (p_pres) {
 		case SL::PRECISION_LOWP:
 			return "lowp ";
@@ -222,7 +222,7 @@ static String _prestr(SL::DataPrecision p_pres) {
 		case SL::PRECISION_HIGHP:
 			return "highp ";
 		case SL::PRECISION_DEFAULT:
-			return "";
+			return p_force_highp ? "highp " : "";
 	}
 	return "";
 }
@@ -617,7 +617,7 @@ String ShaderCompilerRD::_dump_node_code(const SL::Node *p_node, int p_level, Ge
 					//this is an integer to index the global table
 					ucode += _typestr(ShaderLanguage::TYPE_UINT);
 				} else {
-					ucode += _prestr(uniform.precision);
+					ucode += _prestr(uniform.precision, ShaderLanguage::is_float_type(uniform.type));
 					ucode += _typestr(uniform.type);
 				}
 
@@ -742,7 +742,7 @@ String ShaderCompilerRD::_dump_node_code(const SL::Node *p_node, int p_level, Ge
 
 				String vcode;
 				String interp_mode = _interpstr(varying.interpolation);
-				vcode += _prestr(varying.precision);
+				vcode += _prestr(varying.precision, ShaderLanguage::is_float_type(varying.type));
 				vcode += _typestr(varying.type);
 				vcode += " " + _mkid(varying_name);
 				if (varying.array_size > 0) {
@@ -777,7 +777,7 @@ String ShaderCompilerRD::_dump_node_code(const SL::Node *p_node, int p_level, Ge
 				const SL::ShaderNode::Constant &cnode = pnode->vconstants[i];
 				String gcode;
 				gcode += "const ";
-				gcode += _prestr(cnode.precision);
+				gcode += _prestr(cnode.precision, ShaderLanguage::is_float_type(cnode.type));
 				if (cnode.type == SL::TYPE_STRUCT) {
 					gcode += _mkid(cnode.type_str);
 				} else {
diff --git a/servers/rendering/renderer_rd/shaders/decal_data_inc.glsl b/servers/rendering/renderer_rd/shaders/decal_data_inc.glsl
index ccaad13311..158096d3c7 100644
--- a/servers/rendering/renderer_rd/shaders/decal_data_inc.glsl
+++ b/servers/rendering/renderer_rd/shaders/decal_data_inc.glsl
@@ -1,18 +1,18 @@
 
 struct DecalData {
-	mat4 xform; //to decal transform
-	vec3 inv_extents;
-	float albedo_mix;
-	vec4 albedo_rect;
-	vec4 normal_rect;
-	vec4 orm_rect;
-	vec4 emission_rect;
-	vec4 modulate;
-	float emission_energy;
+	highp mat4 xform; //to decal transform
+	highp vec3 inv_extents;
+	mediump float albedo_mix;
+	highp vec4 albedo_rect;
+	highp vec4 normal_rect;
+	highp vec4 orm_rect;
+	highp vec4 emission_rect;
+	highp vec4 modulate;
+	mediump float emission_energy;
 	uint mask;
-	float upper_fade;
-	float lower_fade;
-	mat3x4 normal_xform;
-	vec3 normal;
-	float normal_fade;
+	mediump float upper_fade;
+	mediump float lower_fade;
+	mediump mat3x4 normal_xform;
+	mediump vec3 normal;
+	mediump float normal_fade;
 };
diff --git a/servers/rendering/renderer_rd/shaders/light_data_inc.glsl b/servers/rendering/renderer_rd/shaders/light_data_inc.glsl
index 9155216d7e..fdc7729338 100644
--- a/servers/rendering/renderer_rd/shaders/light_data_inc.glsl
+++ b/servers/rendering/renderer_rd/shaders/light_data_inc.glsl
@@ -4,28 +4,28 @@
 
 struct LightData { //this structure needs to be as packed as possible
 	highp vec3 position;
-	float inv_radius;
+	highp float inv_radius;
 
-	vec3 direction;
-	float size;
+	mediump vec3 direction;
+	highp float size;
 
-	vec3 color;
-	float attenuation;
+	mediump vec3 color;
+	mediump float attenuation;
 
-	float cone_attenuation;
-	float cone_angle;
-	float specular_amount;
+	mediump float cone_attenuation;
+	mediump float cone_angle;
+	mediump float specular_amount;
 	bool shadow_enabled;
 
 	highp vec4 atlas_rect; // rect in the shadow atlas
 	highp mat4 shadow_matrix;
-	float shadow_bias;
-	float shadow_normal_bias;
-	float transmittance_bias;
-	float soft_shadow_size; // for spot, it's the size in uv coordinates of the light, for omni it's the span angle
-	float soft_shadow_scale; // scales the shadow kernel for blurrier shadows
+	highp float shadow_bias;
+	highp float shadow_normal_bias;
+	highp float transmittance_bias;
+	highp float soft_shadow_size; // for spot, it's the size in uv coordinates of the light, for omni it's the span angle
+	highp float soft_shadow_scale; // scales the shadow kernel for blurrier shadows
 	uint mask;
-	float shadow_volumetric_fog_fade;
+	mediump float shadow_volumetric_fog_fade;
 	uint bake_mode;
 	highp vec4 projector_rect; //projector rect in srgb decal atlas
 };
@@ -35,53 +35,53 @@ struct LightData { //this structure needs to be as packed as possible
 #define REFLECTION_AMBIENT_COLOR 2
 
 struct ReflectionData {
-	vec3 box_extents;
-	float index;
-	vec3 box_offset;
+	highp vec3 box_extents;
+	mediump float index;
+	highp vec3 box_offset;
 	uint mask;
-	vec3 ambient; // ambient color
-	float intensity;
+	mediump vec3 ambient; // ambient color
+	mediump float intensity;
 	bool exterior;
 	bool box_project;
 	uint ambient_mode;
 	uint pad;
 	//0-8 is intensity,8-9 is ambient, mode
-	mat4 local_matrix; // up to here for spot and omni, rest is for directional
+	highp mat4 local_matrix; // up to here for spot and omni, rest is for directional
 	// notes: for ambientblend, use distance to edge to blend between already existing global environment
 };
 
 struct DirectionalLightData {
-	vec3 direction;
-	float energy;
-	vec3 color;
-	float size;
-	float specular;
+	mediump vec3 direction;
+	mediump float energy;
+	mediump vec3 color;
+	mediump float size;
+	mediump float specular;
 	uint mask;
-	float softshadow_angle;
-	float soft_shadow_scale;
+	highp float softshadow_angle;
+	highp float soft_shadow_scale;
 	bool blend_splits;
 	bool shadow_enabled;
-	float fade_from;
-	float fade_to;
+	highp float fade_from;
+	highp float fade_to;
 	uvec2 pad;
 	uint bake_mode;
-	float shadow_volumetric_fog_fade;
-	vec4 shadow_bias;
-	vec4 shadow_normal_bias;
-	vec4 shadow_transmittance_bias;
+	mediump float shadow_volumetric_fog_fade;
+	highp vec4 shadow_bias;
+	highp vec4 shadow_normal_bias;
+	highp vec4 shadow_transmittance_bias;
 	highp vec4 shadow_z_range;
 	highp vec4 shadow_range_begin;
-	vec4 shadow_split_offsets;
+	highp vec4 shadow_split_offsets;
 	highp mat4 shadow_matrix1;
 	highp mat4 shadow_matrix2;
 	highp mat4 shadow_matrix3;
 	highp mat4 shadow_matrix4;
-	vec4 shadow_color1;
-	vec4 shadow_color2;
-	vec4 shadow_color3;
-	vec4 shadow_color4;
-	vec2 uv_scale1;
-	vec2 uv_scale2;
-	vec2 uv_scale3;
-	vec2 uv_scale4;
+	mediump vec4 shadow_color1;
+	mediump vec4 shadow_color2;
+	mediump vec4 shadow_color3;
+	mediump vec4 shadow_color4;
+	highp vec2 uv_scale1;
+	highp vec2 uv_scale2;
+	highp vec2 uv_scale3;
+	highp vec2 uv_scale4;
 };
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
index 663100a0b3..6e104e1203 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
@@ -92,7 +92,7 @@ layout(set = MATERIAL_UNIFORM_SET, binding = 0, std140) uniform MaterialUniforms
 
 #ifdef MODE_DUAL_PARABOLOID
 
-layout(location = 8) out float dp_clip;
+layout(location = 8) out highp float dp_clip;
 
 #endif
 
@@ -370,11 +370,6 @@ void main() {
 
 #VERSION_DEFINES
 
-//use medium precision for floats on mobile.
-
-precision mediump float;
-precision highp int;
-
 /* Specialization Constants */
 
 #if !defined(MODE_RENDER_DEPTH)
@@ -498,7 +493,7 @@ layout(location = 0) out vec4 diffuse_buffer; //diffuse (rgb) and roughness
 layout(location = 1) out vec4 specular_buffer; //specular and SSS (subsurface scatter)
 #else
 
-layout(location = 0) out vec4 frag_color;
+layout(location = 0) out mediump vec4 frag_color;
 #endif // MODE_MULTIPLE_RENDER_TARGETS
 
 #endif // RENDER DEPTH
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_mobile_inc.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_mobile_inc.glsl
index f1e554d01c..dd8879acb4 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile_inc.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile_inc.glsl
@@ -93,7 +93,7 @@ directional_lights;
 #define LIGHTMAP_FLAG_USE_SPECULAR_DIRECTION 2
 
 struct Lightmap {
-	mat3 normal_xform;
+	mediump mat3 normal_xform;
 };
 
 layout(set = 0, binding = 9, std140) restrict readonly buffer Lightmaps {
@@ -102,7 +102,7 @@ layout(set = 0, binding = 9, std140) restrict readonly buffer Lightmaps {
 lightmaps;
 
 struct LightmapCapture {
-	vec4 sh[9];
+	mediump vec4 sh[9];
 };
 
 layout(set = 0, binding = 10, std140) restrict readonly buffer LightmapCaptures {
@@ -110,8 +110,8 @@ layout(set = 0, binding = 10, std140) restrict readonly buffer LightmapCaptures
 }
 lightmap_captures;
 
-layout(set = 0, binding = 11) uniform texture2D decal_atlas;
-layout(set = 0, binding = 12) uniform texture2D decal_atlas_srgb;
+layout(set = 0, binding = 11) uniform mediump texture2D decal_atlas;
+layout(set = 0, binding = 12) uniform mediump texture2D decal_atlas_srgb;
 
 layout(set = 0, binding = 13, std430) restrict readonly buffer Decals {
 	DecalData data[];
@@ -119,7 +119,7 @@ layout(set = 0, binding = 13, std430) restrict readonly buffer Decals {
 decals;
 
 layout(set = 0, binding = 14, std430) restrict readonly buffer GlobalVariableData {
-	vec4 data[];
+	highp vec4 data[];
 }
 global_variables;
 
@@ -135,56 +135,56 @@ layout(set = 1, binding = 0, std140) uniform SceneData {
 	highp mat4 projection_matrix_view[MAX_VIEWS];
 	highp mat4 inv_projection_matrix_view[MAX_VIEWS];
 
-	vec2 viewport_size;
-	vec2 screen_pixel_size;
+	highp vec2 viewport_size;
+	highp vec2 screen_pixel_size;
 
 	// Use vec4s because std140 doesn't play nice with vec2s, z and w are wasted.
-	vec4 directional_penumbra_shadow_kernel[32];
-	vec4 directional_soft_shadow_kernel[32];
-	vec4 penumbra_shadow_kernel[32];
-	vec4 soft_shadow_kernel[32];
+	highp vec4 directional_penumbra_shadow_kernel[32];
+	highp vec4 directional_soft_shadow_kernel[32];
+	highp vec4 penumbra_shadow_kernel[32];
+	highp vec4 soft_shadow_kernel[32];
 
-	vec4 ambient_light_color_energy;
+	mediump vec4 ambient_light_color_energy;
 
-	float ambient_color_sky_mix;
+	mediump float ambient_color_sky_mix;
 	bool use_ambient_light;
 	bool use_ambient_cubemap;
 	bool use_reflection_cubemap;
 
-	mat3 radiance_inverse_xform;
+	mediump mat3 radiance_inverse_xform;
 
-	vec2 shadow_atlas_pixel_size;
-	vec2 directional_shadow_pixel_size;
+	highp vec2 shadow_atlas_pixel_size;
+	highp vec2 directional_shadow_pixel_size;
 
 	uint directional_light_count;
-	float dual_paraboloid_side;
-	float z_far;
-	float z_near;
+	mediump float dual_paraboloid_side;
+	highp float z_far;
+	highp float z_near;
 
 	bool ssao_enabled;
-	float ssao_light_affect;
-	float ssao_ao_affect;
+	mediump float ssao_light_affect;
+	mediump float ssao_ao_affect;
 	bool roughness_limiter_enabled;
 
-	float roughness_limiter_amount;
-	float roughness_limiter_limit;
+	mediump float roughness_limiter_amount;
+	mediump float roughness_limiter_limit;
 	uvec2 roughness_limiter_pad;
 
-	vec4 ao_color;
+	mediump vec4 ao_color;
 
 	bool fog_enabled;
-	float fog_density;
-	float fog_height;
-	float fog_height_density;
+	highp float fog_density;
+	highp float fog_height;
+	highp float fog_height_density;
 
-	vec3 fog_light_color;
-	float fog_sun_scatter;
+	mediump vec3 fog_light_color;
+	mediump float fog_sun_scatter;
 
-	float fog_aerial_perspective;
+	mediump float fog_aerial_perspective;
 	bool material_uv2_mode;
 
-	float time;
-	float reflection_multiplier; // one normally, zero when rendering reflections
+	highp float time;
+	mediump float reflection_multiplier; // one normally, zero when rendering reflections
 
 	bool pancake_shadows;
 	uint pad1;
@@ -195,30 +195,30 @@ scene_data;
 
 #ifdef USE_RADIANCE_CUBEMAP_ARRAY
 
-layout(set = 1, binding = 2) uniform textureCubeArray radiance_cubemap;
+layout(set = 1, binding = 2) uniform mediump textureCubeArray radiance_cubemap;
 
 #else
 
-layout(set = 1, binding = 2) uniform textureCube radiance_cubemap;
+layout(set = 1, binding = 2) uniform mediump textureCube radiance_cubemap;
 
 #endif
 
-layout(set = 1, binding = 3) uniform textureCubeArray reflection_atlas;
+layout(set = 1, binding = 3) uniform mediump textureCubeArray reflection_atlas;
 
-layout(set = 1, binding = 4) uniform texture2D shadow_atlas;
+layout(set = 1, binding = 4) uniform highp texture2D shadow_atlas;
 
-layout(set = 1, binding = 5) uniform texture2D directional_shadow_atlas;
+layout(set = 1, binding = 5) uniform highp texture2D directional_shadow_atlas;
 
 // this needs to change to providing just the lightmap we're using..
 layout(set = 1, binding = 6) uniform texture2DArray lightmap_textures[MAX_LIGHTMAP_TEXTURES];
 
-layout(set = 1, binding = 9) uniform texture2D depth_buffer;
-layout(set = 1, binding = 10) uniform texture2D color_buffer;
+layout(set = 1, binding = 9) uniform highp texture2D depth_buffer;
+layout(set = 1, binding = 10) uniform mediump texture2D color_buffer;
 
 /* Set 2 Skeleton & Instancing (can change per item) */
 
 layout(set = 2, binding = 0, std430) restrict readonly buffer Transforms {
-	vec4 data[];
+	highp vec4 data[];
 }
 transforms;
 
diff --git a/servers/rendering/shader_language.cpp b/servers/rendering/shader_language.cpp
index 20fcb1396d..4218214fda 100644
--- a/servers/rendering/shader_language.cpp
+++ b/servers/rendering/shader_language.cpp
@@ -2877,6 +2877,27 @@ bool ShaderLanguage::is_scalar_type(DataType p_type) {
 	return p_type == TYPE_BOOL || p_type == TYPE_INT || p_type == TYPE_UINT || p_type == TYPE_FLOAT;
 }
 
+bool ShaderLanguage::is_float_type(DataType p_type) {
+	switch (p_type) {
+		case TYPE_FLOAT:
+		case TYPE_VEC2:
+		case TYPE_VEC3:
+		case TYPE_VEC4:
+		case TYPE_MAT2:
+		case TYPE_MAT3:
+		case TYPE_MAT4:
+		case TYPE_SAMPLER2D:
+		case TYPE_SAMPLER2DARRAY:
+		case TYPE_SAMPLER3D:
+		case TYPE_SAMPLERCUBE:
+		case TYPE_SAMPLERCUBEARRAY: {
+			return true;
+		}
+		default: {
+			return false;
+		}
+	}
+}
 bool ShaderLanguage::is_sampler_type(DataType p_type) {
 	return p_type == TYPE_SAMPLER2D ||
 		   p_type == TYPE_ISAMPLER2D ||
diff --git a/servers/rendering/shader_language.h b/servers/rendering/shader_language.h
index 9e0a63f0f7..18525e054e 100644
--- a/servers/rendering/shader_language.h
+++ b/servers/rendering/shader_language.h
@@ -774,6 +774,7 @@ public:
 	static DataType get_scalar_type(DataType p_type);
 	static int get_cardinality(DataType p_type);
 	static bool is_scalar_type(DataType p_type);
+	static bool is_float_type(DataType p_type);
 	static bool is_sampler_type(DataType p_type);
 	static Variant constant_value_to_variant(const Vector<ShaderLanguage::ConstantNode::Value> &p_value, DataType p_type, ShaderLanguage::ShaderNode::Uniform::Hint p_hint = ShaderLanguage::ShaderNode::Uniform::HINT_NONE);
 	static PropertyInfo uniform_to_property_info(const ShaderNode::Uniform &p_uniform);