Add rasterize mesh texture demo

Author: beicause

rendering/mesh_texture_rd/README.md

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+# Rasterize Mesh Texture
+
+This is a demo showing how to setup a basic render pipeline to draw mesh to texture using RenderingDevice.
+
+Language: GDScript
+
+Renderer: Mobile
+
+## Screenshots
+
+![Screenshot](screenshots/rasterize_mesh_texture.webp)

rendering/mesh_texture_rd/base_texture.glsl

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+#[vertex]
+#version 450
+
+layout(location=0) in vec3 position;
+layout(location=1) in vec2 uv;
+
+layout(location=0) out vec2 uv_interp;
+
+layout(set=0, binding=0) uniform Data {
+    mat4 xform;
+};
+
+void main() {
+    uv_interp = uv;
+    gl_Position = xform * vec4(position,1.0);
+}
+
+
+#[fragment]
+#version 450
+
+layout(location=0) in vec2 uv_interp;
+
+layout(location=0) out vec4 frag_color;
+
+layout(set=0, binding=1) uniform sampler2D tex;
+
+void main() {
+    frag_color = texture(tex, uv_interp);
+}

rendering/mesh_texture_rd/base_texture.glsl.import

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+[remap]
+
+importer="glsl"
+type="RDShaderFile"
+uid="uid://bsbaafha2qt2x"
+path="res://.godot/imported/base_texture.glsl-7668889287fcd72a7484b036a760efd0.res"
+
+[deps]
+
+source_file="res://base_texture.glsl"
+dest_files=["res://.godot/imported/base_texture.glsl-7668889287fcd72a7484b036a760efd0.res"]
+
+[params]
+

rendering/mesh_texture_rd/godot_icon.svg

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://crm65s53yy1n6"
+path="res://.godot/imported/godot_icon.svg-7b3f4db08ef4bccb8acaa5db9e9fe760.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://godot_icon.svg"
+dest_files=["res://.godot/imported/godot_icon.svg-7b3f4db08ef4bccb8acaa5db9e9fe760.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

rendering/mesh_texture_rd/godot_icon.svg.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b1ukde136ayme"
+path="res://.godot/imported/icon.webp-e94f9a68b0f625a567a797079e4d325f.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.webp"
+dest_files=["res://.godot/imported/icon.webp-e94f9a68b0f625a567a797079e4d325f.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

rendering/mesh_texture_rd/icon.webp

@@ -0,0 +1,96 @@
+[gd_scene load_steps=15 format=3 uid="uid://cnk1inmvelj4x"]
+
+[ext_resource type="Texture2D" uid="uid://crm65s53yy1n6" path="res://godot_icon.svg" id="1_7mycd"]
+[ext_resource type="RDShaderFile" uid="uid://bsbaafha2qt2x" path="res://base_texture.glsl" id="2_272bh"]
+[ext_resource type="Script" uid="uid://cdfq6x7v36k1e" path="res://mesh_texture_rd.gd" id="3_5vw27"]
+[ext_resource type="Script" uid="uid://dhrhfhw6h8kqv" path="res://sprite_2d.gd" id="4_lquwl"]
+
+[sub_resource type="PrismMesh" id="PrismMesh_kek77"]
+
+[sub_resource type="Texture2D" id="Texture2D_4c57u"]
+resource_local_to_scene = false
+resource_name = ""
+script = ExtResource("3_5vw27")
+size = Vector2i(256, 256)
+clear_color = Color(0.412266, 0.447241, 0.735728, 1)
+mesh = SubResource("PrismMesh_kek77")
+base_texture = ExtResource("1_7mycd")
+projection = Projection(-0.605, -1.285, 0, 0, 1.09, -1.67, 0.11, 0, 0.755, 0.035, 1.2, 0, 0.025, -0.26, 0, 1.355)
+glsl_file = ExtResource("2_272bh")
+metadata/_custom_type_script = "uid://delyovxoqvijt"
+
+[sub_resource type="TorusMesh" id="TorusMesh_lquwl"]
+
+[sub_resource type="Texture2D" id="Texture2D_7mycd"]
+resource_local_to_scene = false
+resource_name = ""
+script = ExtResource("3_5vw27")
+size = Vector2i(256, 256)
+clear_color = Color(0.271125, 0.510188, 0.620698, 1)
+mesh = SubResource("TorusMesh_lquwl")
+base_texture = ExtResource("1_7mycd")
+projection = Projection(-0.71, -0.91, 0.5, 0.01, 0.25, 1.53, 0.315, 0, 1.43, -0.135, 0.48, 0.14, 0.085, 0.02, 0.75, 1.845)
+glsl_file = ExtResource("2_272bh")
+metadata/_custom_type_script = "uid://delyovxoqvijt"
+
+[sub_resource type="QuadMesh" id="QuadMesh_1bvp3"]
+
+[sub_resource type="Texture2D" id="Texture2D_lquwl"]
+resource_local_to_scene = false
+resource_name = ""
+script = ExtResource("3_5vw27")
+size = Vector2i(256, 256)
+clear_color = Color(0.572798, 0.384286, 0.683792, 0.337255)
+mesh = SubResource("QuadMesh_1bvp3")
+base_texture = ExtResource("1_7mycd")
+projection = Projection(-1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)
+glsl_file = ExtResource("2_272bh")
+metadata/_custom_type_script = "uid://delyovxoqvijt"
+
+[sub_resource type="Gradient" id="Gradient_1bvp3"]
+interpolation_color_space = 2
+colors = PackedColorArray(0.692862, 0.522376, 0.466238, 1, 0.634748, 0.521037, 0.665456, 1)
+
+[sub_resource type="GradientTexture2D" id="GradientTexture2D_lquwl"]
+gradient = SubResource("Gradient_1bvp3")
+
+[sub_resource type="TextMesh" id="TextMesh_7mycd"]
+text = "Rasterize Mesh Texture"
+
+[sub_resource type="Texture2D" id="Texture2D_272bh"]
+resource_local_to_scene = false
+resource_name = ""
+script = ExtResource("3_5vw27")
+size = Vector2i(552, 131)
+clear_color = Color(1, 1, 1, 0)
+mesh = SubResource("TextMesh_7mycd")
+base_texture = SubResource("GradientTexture2D_lquwl")
+projection = Projection(1.095, 0, 0, 0, 0, -5.53, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1)
+glsl_file = ExtResource("2_272bh")
+metadata/_custom_type_script = "uid://cdfq6x7v36k1e"
+
+[node name="Node2D" type="Node2D"]
+
+[node name="Prism" type="Sprite2D" parent="."]
+position = Vector2(573, 321)
+texture = SubResource("Texture2D_4c57u")
+script = ExtResource("4_lquwl")
+mesh_tex = SubResource("Texture2D_4c57u")
+
+[node name="Torus" type="Sprite2D" parent="."]
+position = Vector2(898, 319)
+texture = SubResource("Texture2D_7mycd")
+script = ExtResource("4_lquwl")
+mesh_tex = SubResource("Texture2D_7mycd")
+
+[node name="Quad" type="Sprite2D" parent="."]
+position = Vector2(252, 321)
+texture = SubResource("Texture2D_lquwl")
+script = ExtResource("4_lquwl")
+mesh_tex = SubResource("Texture2D_lquwl")
+
+[node name="Text" type="Sprite2D" parent="."]
+position = Vector2(293, 89)
+texture = SubResource("Texture2D_272bh")
+script = ExtResource("4_lquwl")
+mesh_tex = SubResource("Texture2D_272bh")