131 lines
3.9 KiB
C#
131 lines
3.9 KiB
C#
using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.Rendering;
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namespace LeTai.Asset.TranslucentImage
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{
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public static class Extensions
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{
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static Mesh fullscreenTriangle;
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/// <summary>
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/// A fullscreen triangle mesh.
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/// </summary>
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static Mesh FullscreenTriangle
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{
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get
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{
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if (fullscreenTriangle != null)
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return fullscreenTriangle;
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fullscreenTriangle = new Mesh { name = "Fullscreen Triangle" };
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fullscreenTriangle.SetVertices(
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new List<Vector3> {
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new Vector3(-1f, -1f, 0f),
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new Vector3(-1f, 3f, 0f),
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new Vector3(3f, -1f, 0f)
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}
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);
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fullscreenTriangle.SetIndices(new[] { 0, 1, 2 }, MeshTopology.Triangles, 0, false);
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fullscreenTriangle.UploadMeshData(false);
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return fullscreenTriangle;
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}
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}
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public static void BlitCustom(
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this CommandBuffer cmd,
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RenderTargetIdentifier source,
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RenderTargetIdentifier destination,
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Material material,
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int passIndex,
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bool useBuiltin = false
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)
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{
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if (useBuiltin)
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cmd.Blit(source, destination, material, passIndex);
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else if (
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SystemInfo.graphicsShaderLevel >= 30
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#if !UNITY_2023_1_OR_NEWER
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&& SystemInfo.graphicsDeviceType != GraphicsDeviceType.OpenGLES2
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#endif
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)
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cmd.BlitProcedural(source, destination, material, passIndex);
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else
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cmd.BlitFullscreenTriangle(source, destination, material, passIndex);
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}
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public static void BlitFullscreenTriangle(
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this CommandBuffer cmd,
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RenderTargetIdentifier source,
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RenderTargetIdentifier destination,
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Material material,
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int pass
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)
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{
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cmd.SetGlobalTexture("_MainTex", source);
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#if UNITY_2018_2_OR_NEWER
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cmd.SetRenderTarget(destination, RenderBufferLoadAction.DontCare, RenderBufferStoreAction.Store);
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#else
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cmd.SetRenderTarget(destination);
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#endif
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cmd.DrawMesh(FullscreenTriangle, Matrix4x4.identity, material, 0, pass);
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}
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public static void BlitProcedural(
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this CommandBuffer cmd,
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RenderTargetIdentifier source,
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RenderTargetIdentifier destination,
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Material material,
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int passIndex
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)
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{
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cmd.SetGlobalTexture(ShaderId.MAIN_TEX, source);
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cmd.SetRenderTarget(new RenderTargetIdentifier(destination, 0, CubemapFace.Unknown, -1),
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RenderBufferLoadAction.DontCare,
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RenderBufferStoreAction.Store,
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RenderBufferLoadAction.DontCare,
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RenderBufferStoreAction.DontCare);
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cmd.DrawProcedural(Matrix4x4.identity, material, passIndex, MeshTopology.Quads, 4, 1, null);
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}
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/// For normalized screen size
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internal static bool Approximately(this Rect self, Rect other)
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{
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return QuickApproximate(self.x, other.x)
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&& QuickApproximate(self.y, other.y)
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&& QuickApproximate(self.width, other.width)
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&& QuickApproximate(self.height, other.height);
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}
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const float EPSILON01 = 5.9604644e-8f; // different between 1 and largest float < 1
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private static bool QuickApproximate(float a, float b)
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{
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return Mathf.Abs(b - a) < EPSILON01;
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}
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public static Vector4 ToMinMaxVector(this Rect self)
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{
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return new Vector4(
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self.xMin,
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self.yMin,
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self.xMax,
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self.yMax
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);
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}
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public static Vector4 ToVector4(this Rect self)
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{
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return new Vector4(
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self.xMin,
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self.yMin,
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self.width,
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self.height
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);
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}
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}
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}
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