Allow changing mipmap LOD bias when FSR 1.0 scaling is not used

Mipmap LOD bias can be useful to improve the appearance of distant
textures without increasing anisotropic filtering (or in situations
where anisotropic filtering is not effective).

`fsr_mipmap_bias` was renamed to `texture_mipmap_bias` accordingly.
The property hint now allows for greater precision as well.

8 files changed, 14 insertions, 16 deletions

diff --git a/servers/rendering/dummy/rasterizer_scene_dummy.h b/servers/rendering/dummy/rasterizer_scene_dummy.h
index 9a376b8806..bc65afacec 100644
--- a/servers/rendering/dummy/rasterizer_scene_dummy.h
+++ b/servers/rendering/dummy/rasterizer_scene_dummy.h
@@ -169,7 +169,7 @@ public:
 	void set_debug_draw_mode(RS::ViewportDebugDraw p_debug_draw) override {}
 
 	RID render_buffers_create() override { return RID(); }
-	void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_fsr_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) override {}
+	void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_texture_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) override {}
 	void gi_set_use_half_resolution(bool p_enable) override {}
 
 	void screen_space_roughness_limiter_set_active(bool p_enable, float p_amount, float p_curve) override {}
diff --git a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
index 4e43acaf57..8d42805d82 100644
--- a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
@@ -2743,7 +2743,7 @@ bool RendererSceneRenderRD::_render_buffers_can_be_storage() {
 	return true;
 }
 
-void RendererSceneRenderRD::render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_fsr_mipmap_bias, RS::ViewportMSAA p_msaa, RenderingServer::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) {
+void RendererSceneRenderRD::render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_texture_mipmap_bias, RS::ViewportMSAA p_msaa, RenderingServer::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) {
 	RendererRD::TextureStorage *texture_storage = RendererRD::TextureStorage::get_singleton();
 	RendererRD::MaterialStorage *material_storage = RendererRD::MaterialStorage::get_singleton();
 
@@ -2754,11 +2754,9 @@ void RendererSceneRenderRD::render_buffers_configure(RID p_render_buffers, RID p
 		p_internal_width = p_width;
 	}
 
-	if (p_width != p_internal_width) {
-		float fsr_mipmap_bias = -log2f(p_width / p_internal_width) + p_fsr_mipmap_bias;
-		material_storage->sampler_rd_configure_custom(fsr_mipmap_bias);
-		update_uniform_sets();
-	}
+	const float texture_mipmap_bias = -log2f(p_width / p_internal_width) + p_texture_mipmap_bias;
+	material_storage->sampler_rd_configure_custom(texture_mipmap_bias);
+	update_uniform_sets();
 
 	RenderBuffers *rb = render_buffers_owner.get_or_null(p_render_buffers);
 
diff --git a/servers/rendering/renderer_rd/renderer_scene_render_rd.h b/servers/rendering/renderer_rd/renderer_scene_render_rd.h
index 8b2c159660..322ca285ed 100644
--- a/servers/rendering/renderer_rd/renderer_scene_render_rd.h
+++ b/servers/rendering/renderer_rd/renderer_scene_render_rd.h
@@ -1166,7 +1166,7 @@ public:
 	virtual RD::DataFormat _render_buffers_get_color_format();
 	virtual bool _render_buffers_can_be_storage();
 	virtual RID render_buffers_create() override;
-	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_fsr_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) override;
+	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_texture_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) override;
 	virtual void gi_set_use_half_resolution(bool p_enable) override;
 
 	RID render_buffers_get_depth_texture(RID p_render_buffers);
diff --git a/servers/rendering/renderer_scene.h b/servers/rendering/renderer_scene.h
index be57701017..12183de4ff 100644
--- a/servers/rendering/renderer_scene.h
+++ b/servers/rendering/renderer_scene.h
@@ -194,7 +194,7 @@ public:
 
 	virtual RID render_buffers_create() = 0;
 
-	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_fsr_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) = 0;
+	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_texture_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) = 0;
 
 	virtual void gi_set_use_half_resolution(bool p_enable) = 0;
 
diff --git a/servers/rendering/renderer_scene_render.h b/servers/rendering/renderer_scene_render.h
index dc328f3e11..68385ba85a 100644
--- a/servers/rendering/renderer_scene_render.h
+++ b/servers/rendering/renderer_scene_render.h
@@ -234,7 +234,7 @@ public:
 	virtual void set_debug_draw_mode(RS::ViewportDebugDraw p_debug_draw) = 0;
 
 	virtual RID render_buffers_create() = 0;
-	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_fsr_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) = 0;
+	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_internal_width, int p_internal_height, int p_width, int p_height, float p_fsr_sharpness, float p_texture_mipmap_bias, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_taa, bool p_use_debanding, uint32_t p_view_count) = 0;
 	virtual void gi_set_use_half_resolution(bool p_enable) = 0;
 
 	virtual void screen_space_roughness_limiter_set_active(bool p_enable, float p_amount, float p_limit) = 0;
diff --git a/servers/rendering/renderer_viewport.cpp b/servers/rendering/renderer_viewport.cpp
index 0e26de8bcb..118bf532b3 100644
--- a/servers/rendering/renderer_viewport.cpp
+++ b/servers/rendering/renderer_viewport.cpp
@@ -138,7 +138,7 @@ void RendererViewport::_configure_3d_render_buffers(Viewport *p_viewport) {
 
 			p_viewport->internal_size = Size2(render_width, render_height);
 
-			RSG::scene->render_buffers_configure(p_viewport->render_buffers, p_viewport->render_target, render_width, render_height, width, height, p_viewport->fsr_sharpness, p_viewport->fsr_mipmap_bias, p_viewport->msaa, p_viewport->screen_space_aa, p_viewport->use_taa, p_viewport->use_debanding, p_viewport->get_view_count());
+			RSG::scene->render_buffers_configure(p_viewport->render_buffers, p_viewport->render_target, render_width, render_height, width, height, p_viewport->fsr_sharpness, p_viewport->texture_mipmap_bias, p_viewport->msaa, p_viewport->screen_space_aa, p_viewport->use_taa, p_viewport->use_debanding, p_viewport->get_view_count());
 		}
 	}
 }
@@ -746,11 +746,11 @@ void RendererViewport::viewport_set_fsr_sharpness(RID p_viewport, float p_sharpn
 	_configure_3d_render_buffers(viewport);
 }
 
-void RendererViewport::viewport_set_fsr_mipmap_bias(RID p_viewport, float p_mipmap_bias) {
+void RendererViewport::viewport_set_texture_mipmap_bias(RID p_viewport, float p_mipmap_bias) {
 	Viewport *viewport = viewport_owner.get_or_null(p_viewport);
 	ERR_FAIL_COND(!viewport);
 
-	viewport->fsr_mipmap_bias = p_mipmap_bias;
+	viewport->texture_mipmap_bias = p_mipmap_bias;
 	_configure_3d_render_buffers(viewport);
 }
 
diff --git a/servers/rendering/renderer_viewport.h b/servers/rendering/renderer_viewport.h
index 4647fbd8c3..5e37c96336 100644
--- a/servers/rendering/renderer_viewport.h
+++ b/servers/rendering/renderer_viewport.h
@@ -59,7 +59,7 @@ public:
 		RS::ViewportScaling3DMode scaling_3d_mode = RenderingServer::VIEWPORT_SCALING_3D_MODE_BILINEAR;
 		float scaling_3d_scale = 1.0;
 		float fsr_sharpness = 0.2f;
-		float fsr_mipmap_bias = 0.0f;
+		float texture_mipmap_bias = 0.0f;
 		bool fsr_enabled = false;
 		RS::ViewportUpdateMode update_mode = RenderingServer::VIEWPORT_UPDATE_WHEN_VISIBLE;
 		RID render_target;
@@ -229,7 +229,7 @@ public:
 	void viewport_set_scaling_3d_mode(RID p_viewport, RS::ViewportScaling3DMode p_mode);
 	void viewport_set_scaling_3d_scale(RID p_viewport, float p_scaling_3d_scale);
 	void viewport_set_fsr_sharpness(RID p_viewport, float p_sharpness);
-	void viewport_set_fsr_mipmap_bias(RID p_viewport, float p_mipmap_bias);
+	void viewport_set_texture_mipmap_bias(RID p_viewport, float p_mipmap_bias);
 
 	void viewport_set_update_mode(RID p_viewport, RS::ViewportUpdateMode p_mode);
 	void viewport_set_vflip(RID p_viewport, bool p_enable);
diff --git a/servers/rendering/rendering_server_default.h b/servers/rendering/rendering_server_default.h
index f093f43a82..136ed3cf0b 100644
--- a/servers/rendering/rendering_server_default.h
+++ b/servers/rendering/rendering_server_default.h
@@ -591,7 +591,7 @@ public:
 	FUNC2(viewport_set_scaling_3d_mode, RID, ViewportScaling3DMode)
 	FUNC2(viewport_set_scaling_3d_scale, RID, float)
 	FUNC2(viewport_set_fsr_sharpness, RID, float)
-	FUNC2(viewport_set_fsr_mipmap_bias, RID, float)
+	FUNC2(viewport_set_texture_mipmap_bias, RID, float)
 
 	FUNC2(viewport_set_update_mode, RID, ViewportUpdateMode)