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More text rendering tests

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This commit is contained in:
Andrew Cassidy 2020-07-24 01:53:10 -07:00
parent 7574614776
commit f3698fc108
1 changed files with 58 additions and 34 deletions
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92
Assets/Scripts/TextRenderTest.cs
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@ -12,18 +12,18 @@ public class TextRenderTest : MonoBehaviour {
public GameObject _cameraObject;
public TextMeshPro _tmp;
public Material _blitMaterial;
public Material _targetMaterial;
public RenderTexture renderTex;
private float pixelDensity = 36;
private int MaxTextureSize = 4096;
public RenderTexture renderTex;
private float pixelDensity = 5;
private int MaxTextureSize = 4096;
public const TextureFormat TextTextureFormat = TextureFormat.RG16;
public const TextureFormat TextTextureFormat = TextureFormat.RG16;
public const RenderTextureFormat TextRenderTextureFormat = RenderTextureFormat.R8;
// Start is called before the first frame update
void Start() {
Debug.Log("starting...");
@ -32,12 +32,7 @@ public class TextRenderTest : MonoBehaviour {
}
// Update is called once per frame
void Update() {
}
private void go() {
Debug.Log("starting...");
}
void Update() { }
private IEnumerator OnRender() {
Debug.Log("starting...2");
@ -49,42 +44,71 @@ public class TextRenderTest : MonoBehaviour {
var bounds = mesh.bounds;
Debug.Log(bounds.size);
var width = Mathf.NextPowerOfTwo((int) (bounds.size.x * pixelDensity));
var height = Mathf.NextPowerOfTwo((int) (bounds.size.y * pixelDensity));
Debug.Log($"width = {width}");
Debug.Log($"height = {height}");
_camera.orthographicSize = height / pixelDensity / 2;
_camera.aspect = (float) width / height;
var width = bounds.size.x * pixelDensity;
var height = bounds.size.y * pixelDensity;
var widthPoT = Mathf.NextPowerOfTwo((int) width);
var heightPoT = Mathf.NextPowerOfTwo((int) height);
if (widthPoT > MaxTextureSize) {
widthPoT /= widthPoT / MaxTextureSize;
heightPoT /= widthPoT / MaxTextureSize;
}
if (heightPoT > MaxTextureSize) {
widthPoT /= heightPoT / MaxTextureSize;
heightPoT /= heightPoT / MaxTextureSize;
}
widthPoT = Mathf.Min(widthPoT, MaxTextureSize);
heightPoT = Mathf.Min(heightPoT, MaxTextureSize);
var widthRatio = widthPoT / width;
var heightRatio = heightPoT / height;
var sizeRatio = Mathf.Min(widthRatio, heightRatio);
int scaledHeight = (int) (sizeRatio * height);
int scaledWidth = (int) (sizeRatio * width);
Debug.Log($"width = {scaledWidth}");
Debug.Log($"height = {scaledHeight}");
_camera.orthographicSize = scaledHeight / pixelDensity / 2;
_camera.aspect = (float) widthPoT / heightPoT;
_cameraObject.transform.localPosition = new Vector3(bounds.center.x, bounds.center.y, -1);
width = Mathf.Min(width, MaxTextureSize);
height = Mathf.Min(height, MaxTextureSize);
var halfHeight = scaledHeight / pixelDensity / 2;
var halfWidth = scaledWidth / pixelDensity / 2;
var matrix = Matrix4x4.Ortho(bounds.center.x - halfWidth, bounds.center.x + halfWidth,
bounds.center.y - halfHeight, bounds.center.y + halfHeight, -1, 1);
// setup texture
var texture = new Texture2D(width, height, TextTextureFormat, true);
var texture = new Texture2D(widthPoT, heightPoT, TextTextureFormat, true);
_targetMaterial.mainTexture = texture;
// setup render texture
renderTex = RenderTexture.GetTemporary(width, height, 0, TextRenderTextureFormat, RenderTextureReadWrite.Linear, 1);
renderTex.autoGenerateMips = true;
_camera.targetTexture = renderTex;
renderTex = RenderTexture.GetTemporary(widthPoT, heightPoT, 0, TextRenderTextureFormat, RenderTextureReadWrite.Linear, 1);
renderTex.autoGenerateMips = false;
RenderTexture.active = renderTex;
GL.PushMatrix();
GL.LoadProjectionMatrix(matrix);
_blitMaterial.SetPass(0);
Graphics.DrawMeshNow(mesh, Matrix4x4.identity);
GL.PopMatrix();
// setup material
_blitMaterial.mainTexture = _tmp.font.atlas;
// draw the mesh
Graphics.DrawMesh(mesh, _tmp.renderer.localToWorldMatrix, _blitMaterial, 0, _camera, 0);
_camera.Render();
yield return null;
RenderTexture.active = renderTex;
texture.ReadPixels(new Rect(0, 0, width, height), 0, 0, true);
texture.ReadPixels(new Rect(0, 0, widthPoT, heightPoT), 0, 0, true);
texture.Apply(false, true);
RenderTexture.ReleaseTemporary(renderTex);
}
}
}