Play around more with text rendering
parent
2c8773ce61
commit
0a77ef57b7
@ -0,0 +1,51 @@
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Shader "ConformalDecals/TMP_Blit"
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{
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Properties
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{
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_MainTex("_MainTex (RGB spec(A))", 2D) = "white" {}
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}
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SubShader
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{
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Tags { "Queue" = "Transparent" }
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Cull Off
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ZWrite Off
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Pass
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{
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Blend One One
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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sampler2D _MainTex;
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#include "UnityCG.cginc"
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#include "Lighting.cginc"
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#include "AutoLight.cginc"
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struct v2f {
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float4 pos : SV_POSITION;
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float2 uv : TEXCOORD0;
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};
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v2f vert(float4 vertex : POSITION, float2 uv : TEXCOORD0) {
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v2f o;
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o.pos = UnityObjectToClipPos(vertex);
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o.uv = uv;
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return o;
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}
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fixed4 frag (v2f i) : SV_Target {
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fixed4 c = 0;
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c.r = tex2D(_MainTex,(i.uv)).a;
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return c;
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}
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ENDCG
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}
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}
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}
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@ -1,146 +1,112 @@
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using System;
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using ConformalDecals.Util;
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using System.Collections;
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using TMPro;
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using UnityEngine;
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using UnityEngine.Rendering;
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namespace ConformalDecals.Text {
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[KSPAddon(KSPAddon.Startup.FlightAndEditor, true)]
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public class TextRenderer : MonoBehaviour {
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public static TextRenderer Instance {
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get {
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if (!_instance._isSetup) {
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_instance.Setup();
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}
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namespace ConformalDecals {
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public class TextRenderer {
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private struct GlyphInfo {
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public TMP_Glyph glyph;
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public Vector2Int size;
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public Vector2Int position;
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public int fontIndex;
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public bool needsResample;
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return _instance;
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}
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}
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private struct FontInfo {
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public TMP_FontAsset font;
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public Texture2D fontAtlas;
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public Color32[] fontAtlasColors;
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}
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public const TextureFormat TextTextureFormat = TextureFormat.Alpha8;
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public const RenderTextureFormat TextRenderTextureFormat = RenderTextureFormat.R8;
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public static Texture2D RenderToTexture(TMP_FontAsset font, string text) {
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Debug.Log($"Rendering text: {text}");
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var charArray = text.ToCharArray();
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var glyphInfoArray = new GlyphInfo[charArray.Length];
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var fontInfoArray = new FontInfo[charArray.Length];
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private const string BlitShader = "ConformalDecals/TMP_Blit";
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private const int MaxTextureSize = 4096;
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var baseScale = font.fontInfo.Scale;
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private static TextRenderer _instance;
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var padding = (int) font.fontInfo.Padding;
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var ascender = (int) font.fontInfo.Ascender;
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var descender = (int) font.fontInfo.Descender;
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var baseline = (int) baseScale * (descender + padding);
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Debug.Log($"baseline: {baseline}");
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Debug.Log($"ascender: {ascender}");
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Debug.Log($"descender: {descender}");
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Debug.Log($"baseScale: {baseScale}");
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private bool _isSetup;
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private TextMeshPro _tmp;
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private GameObject _cameraObject;
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private Camera _camera;
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private Material _blitMaterial;
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fontInfoArray[0].font = font;
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private void Start() {
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if (_instance._isSetup) {
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Debug.Log("[ConformalDecals] Duplicate TextRenderer created???");
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}
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int xAdvance = 0;
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for (var i = 0; i < charArray.Length; i++) {
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Debug.Log("[ConformalDecals] Creating TextRenderer Object");
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_instance = this;
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DontDestroyOnLoad(gameObject);
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}
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var glyphFont = TMP_FontUtilities.SearchForGlyph(font, charArray[i], out var glyph);
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public void Setup() {
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if (_isSetup) return;
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if (glyphFont == font) {
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glyphInfoArray[i].fontIndex = 0;
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}
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else {
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for (int f = 1; i < charArray.Length; i++) {
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if (fontInfoArray[f].font == null) {
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fontInfoArray[f].font = glyphFont;
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glyphInfoArray[i].fontIndex = f;
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break;
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}
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if (fontInfoArray[f].font == glyphFont) {
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glyphInfoArray[i].fontIndex = f;
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break;
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}
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}
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}
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Debug.Log($"getting font info for character: '{charArray[i]}'");
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Debug.Log($"character font: {glyphFont.name}");
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Debug.Log("[ConformalDecals] Setting Up TextRenderer Object");
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glyphInfoArray[i].glyph = glyph;
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glyphInfoArray[i].needsResample = false;
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_tmp = gameObject.AddComponent<TextMeshPro>();
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_tmp.renderer.enabled = false; // dont automatically render
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float elementScale = glyph.scale;
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_cameraObject = new GameObject("ConformalDecals text camera");
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_cameraObject.transform.parent = transform;
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_cameraObject.transform.SetPositionAndRotation(Vector3.back, Quaternion.identity);
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if (glyphFont == font) {
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if (!Mathf.Approximately(elementScale, 1)) {
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glyphInfoArray[i].needsResample = true;
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}
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_camera = _cameraObject.AddComponent<Camera>();
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_camera.enabled = false; // dont automatically render
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_camera.orthographic = true;
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_camera.depthTextureMode = DepthTextureMode.None;
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_camera.nearClipPlane = 0.1f;
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_camera.farClipPlane = 2f;
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_isSetup = true;
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elementScale *= baseScale;
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}
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else {
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var fontScale = glyphFont.fontInfo.Scale / glyphFont.fontInfo.PointSize;
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if (!Mathf.Approximately(fontScale, baseScale)) {
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glyphInfoArray[i].needsResample = true;
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}
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_blitMaterial = new Material(Shabby.Shabby.FindShader(BlitShader));
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}
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elementScale *= fontScale;
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}
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public Texture2D RenderToTexture(Texture2D texture2D, TMP_FontAsset font, string text, float fontSize, float pixelDensity) {
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// generate text mesh
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_tmp.SetText(text);
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_tmp.font = font;
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_tmp.fontSize = fontSize;
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_tmp.ForceMeshUpdate();
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Debug.Log($"character scale: {glyphFont.fontInfo.Scale / glyphFont.fontInfo.PointSize}");
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Debug.Log($"character needs resampling: {glyphInfoArray[i].needsResample}");
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// calculate camera and texture size
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var mesh = _tmp.mesh;
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var bounds = mesh.bounds;
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glyphInfoArray[i].size.x = (int) ((glyph.width + (padding * 2)) * elementScale);
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glyphInfoArray[i].size.y = (int) ((glyph.height + (padding * 2)) * elementScale);
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glyphInfoArray[i].position.x = (int) ((xAdvance + glyph.xOffset - padding) * elementScale);
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glyphInfoArray[i].position.y = (int) ((baseline + glyph.yOffset - padding) * elementScale);
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Debug.Log($"character size: {glyphInfoArray[i].size}");
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Debug.Log($"character position: {glyphInfoArray[i].position}");
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}
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var width = Mathf.NextPowerOfTwo((int) (bounds.size.x * pixelDensity));
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var height = Mathf.NextPowerOfTwo((int) (bounds.size.y * pixelDensity));
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// calculate texture bounds
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int xOffset = glyphInfoArray[0].position.x;
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var textureWidth = (glyphInfoArray[charArray.Length - 1].position.x + glyphInfoArray[charArray.Length - 1].size.x) - xOffset;
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var textureHeight = (int) baseScale * (ascender + descender + padding * 2);
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_camera.orthographicSize = height / pixelDensity / 2;
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_camera.aspect = (float) width / height;
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// ensure texture sizes are powers of 2
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textureWidth = Mathf.NextPowerOfTwo(textureWidth);
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textureHeight = Mathf.NextPowerOfTwo(textureHeight);
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Debug.Log($"texture is {textureWidth} x {textureHeight}");
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_cameraObject.transform.localPosition = new Vector3(bounds.center.x, bounds.center.y, -1);
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var texture = new Texture2D(textureWidth, textureHeight, TextureFormat.Alpha8, true);
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width = Mathf.Min(width, MaxTextureSize);
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height = Mathf.Max(height, MaxTextureSize);
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var colors = new Color32[textureWidth * textureHeight];
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// setup render texture
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var renderTex = RenderTexture.GetTemporary(width, height, 0, TextRenderTextureFormat, RenderTextureReadWrite.Linear, 1);
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_camera.targetTexture = renderTex;
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for (var i = 0; i < fontInfoArray.Length; i++) {
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if (fontInfoArray[i].font == null) break;
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fontInfoArray[i].fontAtlas = fontInfoArray[i].font.atlas;
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fontInfoArray[i].fontAtlasColors = fontInfoArray[i].fontAtlas.GetPixels32();
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}
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// setup material
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_blitMaterial.SetTexture(PropertyIDs._MainTex, font.atlas);
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_blitMaterial.SetPass(0);
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for (int i = 0; i < charArray.Length; i++) {
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var glyphInfo = glyphInfoArray[i];
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var glyph = glyphInfo.glyph;
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var fontInfo = fontInfoArray[glyphInfo.fontIndex];
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var srcPos = new Vector2Int((int) glyph.x, (int) glyph.y);
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var dstPos = glyphInfo.position;
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dstPos.x += xOffset;
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var dstSize = glyphInfo.size;
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Debug.Log($"rendering character number {i}");
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if (glyphInfo.needsResample) {
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var srcSize = new Vector2(glyph.width, glyph.height);
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TextureUtils.BlitRectBilinearAlpha(fontInfo.fontAtlas, srcPos, srcSize, texture, colors, dstPos, dstSize, TextureUtils.BlitMode.Add);
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}
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else {
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TextureUtils.BlitRectAlpha(fontInfo.fontAtlas, fontInfo.fontAtlasColors, srcPos, texture, colors, dstPos, dstSize, TextureUtils.BlitMode.Add);
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}
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}
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// draw the mesh
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Graphics.DrawMeshNow(mesh, _tmp.renderer.localToWorldMatrix);
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texture.Apply(true);
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var request = AsyncGPUReadback.Request(renderTex, 0, TextTextureFormat);
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return texture;
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request.WaitForCompletion();
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if (request.hasError) {
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throw new Exception("[ConformalDecals] Error encountered trying to request render texture data from the GPU!");
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}
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}
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}
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}
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@ -0,0 +1,5 @@
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namespace ConformalDecals.Text {
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public struct TextSettings {
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}
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}
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