Fixes and optimizations to mobile renderer

* Only apply final actions to attachments used in the last pass.
* Fixes to draw list final action (was using continue instead of read/drop).
* Profiling regions inside draw lists now properly throw errors.
* Ability to enable gpu profile printing from project settings. (used to debug).

3 files changed, 37 insertions, 33 deletions

diff --git a/servers/rendering/renderer_rd/shaders/light_data_inc.glsl b/servers/rendering/renderer_rd/shaders/light_data_inc.glsl
index 2fce258cff..9155216d7e 100644
--- a/servers/rendering/renderer_rd/shaders/light_data_inc.glsl
+++ b/servers/rendering/renderer_rd/shaders/light_data_inc.glsl
@@ -3,7 +3,7 @@
 #define LIGHT_BAKE_STATIC 2
 
 struct LightData { //this structure needs to be as packed as possible
-	vec3 position;
+	highp vec3 position;
 	float inv_radius;
 
 	vec3 direction;
@@ -17,8 +17,8 @@ struct LightData { //this structure needs to be as packed as possible
 	float specular_amount;
 	bool shadow_enabled;
 
-	vec4 atlas_rect; // rect in the shadow atlas
-	mat4 shadow_matrix;
+	highp vec4 atlas_rect; // rect in the shadow atlas
+	highp mat4 shadow_matrix;
 	float shadow_bias;
 	float shadow_normal_bias;
 	float transmittance_bias;
@@ -27,7 +27,7 @@ struct LightData { //this structure needs to be as packed as possible
 	uint mask;
 	float shadow_volumetric_fog_fade;
 	uint bake_mode;
-	vec4 projector_rect; //projector rect in srgb decal atlas
+	highp vec4 projector_rect; //projector rect in srgb decal atlas
 };
 
 #define REFLECTION_AMBIENT_DISABLED 0
@@ -69,13 +69,13 @@ struct DirectionalLightData {
 	vec4 shadow_bias;
 	vec4 shadow_normal_bias;
 	vec4 shadow_transmittance_bias;
-	vec4 shadow_z_range;
-	vec4 shadow_range_begin;
+	highp vec4 shadow_z_range;
+	highp vec4 shadow_range_begin;
 	vec4 shadow_split_offsets;
-	mat4 shadow_matrix1;
-	mat4 shadow_matrix2;
-	mat4 shadow_matrix3;
-	mat4 shadow_matrix4;
+	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;
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
index 681656e1d5..2babe92c1c 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile.glsl
@@ -59,27 +59,27 @@ layout(location = 11) in vec4 weight_attrib;
 
 /* Varyings */
 
-layout(location = 0) out vec3 vertex_interp;
+layout(location = 0) highp out vec3 vertex_interp;
 
 #ifdef NORMAL_USED
-layout(location = 1) out vec3 normal_interp;
+layout(location = 1) mediump out vec3 normal_interp;
 #endif
 
 #if defined(COLOR_USED)
-layout(location = 2) out vec4 color_interp;
+layout(location = 2) mediump out vec4 color_interp;
 #endif
 
 #ifdef UV_USED
-layout(location = 3) out vec2 uv_interp;
+layout(location = 3) mediump out vec2 uv_interp;
 #endif
 
 #if defined(UV2_USED) || defined(USE_LIGHTMAP)
-layout(location = 4) out vec2 uv2_interp;
+layout(location = 4) mediump out vec2 uv2_interp;
 #endif
 
 #if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
-layout(location = 5) out vec3 tangent_interp;
-layout(location = 6) out vec3 binormal_interp;
+layout(location = 5) mediump out vec3 tangent_interp;
+layout(location = 6) mediump out vec3 binormal_interp;
 #endif
 
 #ifdef MATERIAL_UNIFORMS_USED
@@ -370,6 +370,10 @@ void main() {
 
 #VERSION_DEFINES
 
+//use medium precision for floats on mobile.
+
+precision mediump float;
+
 /* Specialization Constants */
 
 /* Specialization Constants (Toggles) */
@@ -395,32 +399,32 @@ layout(constant_id = 11) const bool sc_projector_use_mipmaps = true;
 
 /* Varyings */
 
-layout(location = 0) in vec3 vertex_interp;
+layout(location = 0) highp in vec3 vertex_interp;
 
 #ifdef NORMAL_USED
-layout(location = 1) in vec3 normal_interp;
+layout(location = 1) mediump in vec3 normal_interp;
 #endif
 
 #if defined(COLOR_USED)
-layout(location = 2) in vec4 color_interp;
+layout(location = 2) mediump in vec4 color_interp;
 #endif
 
 #ifdef UV_USED
-layout(location = 3) in vec2 uv_interp;
+layout(location = 3) mediump in vec2 uv_interp;
 #endif
 
 #if defined(UV2_USED) || defined(USE_LIGHTMAP)
-layout(location = 4) in vec2 uv2_interp;
+layout(location = 4) mediump in vec2 uv2_interp;
 #endif
 
 #if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
-layout(location = 5) in vec3 tangent_interp;
-layout(location = 6) in vec3 binormal_interp;
+layout(location = 5) mediump in vec3 tangent_interp;
+layout(location = 6) mediump in vec3 binormal_interp;
 #endif
 
 #ifdef MODE_DUAL_PARABOLOID
 
-layout(location = 8) in float dp_clip;
+layout(location = 8) highp in float dp_clip;
 
 #endif
 
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 d9682d7b23..f1e554d01c 100644
--- a/servers/rendering/renderer_rd/shaders/scene_forward_mobile_inc.glsl
+++ b/servers/rendering/renderer_rd/shaders/scene_forward_mobile_inc.glsl
@@ -16,12 +16,12 @@
 /* don't exceed 128 bytes!! */
 /* put instance data into our push content, not a array */
 layout(push_constant, binding = 0, std430) uniform DrawCall {
-	mat4 transform; // 64 - 64
+	highp mat4 transform; // 64 - 64
 	uint flags; // 04 - 68
 	uint instance_uniforms_ofs; //base offset in global buffer for instance variables	// 04 - 72
 	uint gi_offset; //GI information when using lightmapping (VCT or lightmap index)    // 04 - 76
 	uint layer_mask; // 04 - 80
-	vec4 lightmap_uv_scale; // 16 - 96 doubles as uv_offset when needed
+	highp vec4 lightmap_uv_scale; // 16 - 96 doubles as uv_offset when needed
 
 	uvec2 reflection_probes; // 08 - 104
 	uvec2 omni_lights; // 08 - 112
@@ -126,14 +126,14 @@ global_variables;
 /* Set 1: Render Pass (changes per render pass) */
 
 layout(set = 1, binding = 0, std140) uniform SceneData {
-	mat4 projection_matrix;
-	mat4 inv_projection_matrix;
-	mat4 camera_matrix;
-	mat4 inv_camera_matrix;
+	highp mat4 projection_matrix;
+	highp mat4 inv_projection_matrix;
+	highp mat4 camera_matrix;
+	highp mat4 inv_camera_matrix;
 
 	// only used for multiview
-	mat4 projection_matrix_view[MAX_VIEWS];
-	mat4 inv_projection_matrix_view[MAX_VIEWS];
+	highp mat4 projection_matrix_view[MAX_VIEWS];
+	highp mat4 inv_projection_matrix_view[MAX_VIEWS];
 
 	vec2 viewport_size;
 	vec2 screen_pixel_size;