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91 lines
2.6 KiB
C#
91 lines
2.6 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using TMPro;
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using UnityEngine;
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using UnityEngine.Rendering;
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public class TextRenderTest : MonoBehaviour {
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//[InspectorButton("go")] public bool button;
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public Camera _camera;
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public GameObject _cameraObject;
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public TextMeshPro _tmp;
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public Material _blitMaterial;
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public Material _targetMaterial;
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public RenderTexture renderTex;
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private float pixelDensity = 36;
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private int MaxTextureSize = 4096;
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public const TextureFormat TextTextureFormat = TextureFormat.RG16;
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public const RenderTextureFormat TextRenderTextureFormat = RenderTextureFormat.R8;
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// Start is called before the first frame update
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void Start() {
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Debug.Log("starting...");
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StartCoroutine(OnRender());
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}
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// Update is called once per frame
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void Update() {
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}
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private void go() {
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Debug.Log("starting...");
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}
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private IEnumerator OnRender() {
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Debug.Log("starting...2");
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// calculate camera and texture size
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_tmp.ForceMeshUpdate();
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var mesh = _tmp.mesh;
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mesh.RecalculateBounds();
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var bounds = mesh.bounds;
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Debug.Log(bounds.size);
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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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Debug.Log($"width = {width}");
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Debug.Log($"height = {height}");
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_camera.orthographicSize = height / pixelDensity / 2;
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_camera.aspect = (float) width / height;
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_cameraObject.transform.localPosition = new Vector3(bounds.center.x, bounds.center.y, -1);
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width = Mathf.Min(width, MaxTextureSize);
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height = Mathf.Min(height, MaxTextureSize);
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// setup texture
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var texture = new Texture2D(width, height, TextTextureFormat, true);
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_targetMaterial.mainTexture = texture;
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// setup render texture
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renderTex = RenderTexture.GetTemporary(width, height, 0, TextRenderTextureFormat, RenderTextureReadWrite.Linear, 1);
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renderTex.autoGenerateMips = true;
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_camera.targetTexture = renderTex;
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// setup material
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_blitMaterial.mainTexture = _tmp.font.atlas;
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// draw the mesh
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Graphics.DrawMesh(mesh, _tmp.renderer.localToWorldMatrix, _blitMaterial, 0, _camera, 0);
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_camera.Render();
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yield return null;
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RenderTexture.active = renderTex;
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texture.ReadPixels(new Rect(0, 0, width, height), 0, 0, true);
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texture.Apply(false, true);
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RenderTexture.ReleaseTemporary(renderTex);
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}
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}
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