GraphicsUtils.cs
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namespace UnityEngine.PostProcessing
{
using UnityObject = Object;
public static class GraphicsUtils
{
public static bool isLinearColorSpace
{
get { return QualitySettings.activeColorSpace == ColorSpace.Linear; }
}
public static bool supportsDX11
{
#if UNITY_WEBGL
get { return false; }
#else
get { return SystemInfo.graphicsShaderLevel >= 50 && SystemInfo.supportsComputeShaders; }
#endif
}
static Texture2D s_WhiteTexture;
public static Texture2D whiteTexture
{
get
{
if (s_WhiteTexture != null)
return s_WhiteTexture;
s_WhiteTexture = new Texture2D(1, 1, TextureFormat.ARGB32, false);
s_WhiteTexture.SetPixel(0, 0, new Color(1f, 1f, 1f, 1f));
s_WhiteTexture.Apply();
return s_WhiteTexture;
}
}
static Mesh s_Quad;
public static Mesh quad
{
get
{
if (s_Quad != null)
return s_Quad;
var vertices = new[]
{
new Vector3(-1f, -1f, 0f),
new Vector3( 1f, 1f, 0f),
new Vector3( 1f, -1f, 0f),
new Vector3(-1f, 1f, 0f)
};
var uvs = new[]
{
new Vector2(0f, 0f),
new Vector2(1f, 1f),
new Vector2(1f, 0f),
new Vector2(0f, 1f)
};
var indices = new[] { 0, 1, 2, 1, 0, 3 };
s_Quad = new Mesh
{
vertices = vertices,
uv = uvs,
triangles = indices
};
s_Quad.RecalculateNormals();
s_Quad.RecalculateBounds();
return s_Quad;
}
}
// Useful when rendering to MRT
public static void Blit(Material material, int pass)
{
GL.PushMatrix();
{
GL.LoadOrtho();
material.SetPass(pass);
GL.Begin(GL.TRIANGLE_STRIP);
{
GL.TexCoord2(0f, 0f); GL.Vertex3(0f, 0f, 0.1f);
GL.TexCoord2(1f, 0f); GL.Vertex3(1f, 0f, 0.1f);
GL.TexCoord2(0f, 1f); GL.Vertex3(0f, 1f, 0.1f);
GL.TexCoord2(1f, 1f); GL.Vertex3(1f, 1f, 0.1f);
}
GL.End();
}
GL.PopMatrix();
}
public static void ClearAndBlit(Texture source, RenderTexture destination, Material material, int pass, bool clearColor = true, bool clearDepth = false)
{
var oldRT = RenderTexture.active;
RenderTexture.active = destination;
GL.Clear(false, clearColor, Color.clear);
GL.PushMatrix();
{
GL.LoadOrtho();
material.SetTexture("_MainTex", source);
material.SetPass(pass);
GL.Begin(GL.TRIANGLE_STRIP);
{
GL.TexCoord2(0f, 0f); GL.Vertex3(0f, 0f, 0.1f);
GL.TexCoord2(1f, 0f); GL.Vertex3(1f, 0f, 0.1f);
GL.TexCoord2(0f, 1f); GL.Vertex3(0f, 1f, 0.1f);
GL.TexCoord2(1f, 1f); GL.Vertex3(1f, 1f, 0.1f);
}
GL.End();
}
GL.PopMatrix();
RenderTexture.active = oldRT;
}
public static void Destroy(UnityObject obj)
{
if (obj != null)
{
#if UNITY_EDITOR
if (Application.isPlaying)
UnityObject.Destroy(obj);
else
UnityObject.DestroyImmediate(obj);
#else
UnityObject.Destroy(obj);
#endif
}
}
public static void Dispose()
{
Destroy(s_Quad);
}
}
}