/// <summary>
/// Set the value in the material.
/// </summary>
/// <param name="clip">Texture used for clipping.</param>
/// <param name="clipScale">The ratio of the size of the clip texture to the target texture.</param>
/// <param name="grabTarget">Texture of clipping target.</param>
/// <param name="targetUV">UV coordinates on the target texture.</param>
/// <param name="wrapMpde">Texture wrap mode.</param>
/// <param name="replaceAlpha">Replace to clip textures alpha</param>
private static void SetGrabAreaProperty(Texture clip, float clipScale, Texture grabTarget, Vector2 targetUV, float rotateAngle, GrabTextureWrapMode wrapMpde, bool replaceAlpha)
{
grabAreaMaterial.SetTexture(CLIP, clip);
grabAreaMaterial.SetTexture(TARGET, grabTarget);
grabAreaMaterial.SetFloat(CLIP_SCALE, clipScale);
grabAreaMaterial.SetFloat(ROTATE, rotateAngle);
grabAreaMaterial.SetVector(CLIP_UV, targetUV);
foreach (var key in grabAreaMaterial.shaderKeywords)
{
grabAreaMaterial.DisableKeyword(key);
}
switch (wrapMpde)
{
case GrabTextureWrapMode.Clamp:
grabAreaMaterial.EnableKeyword(WM_CLAMP);
break;
case GrabTextureWrapMode.Repeat:
grabAreaMaterial.EnableKeyword(WM_REPEAT);
break;
case GrabTextureWrapMode.Clip:
grabAreaMaterial.EnableKeyword(WM_CLIP);
break;
default:
break;
}
switch (replaceAlpha)
{
case true:
grabAreaMaterial.EnableKeyword(ALPHA_REPLACE);
break;
case false:
grabAreaMaterial.EnableKeyword(ALPHA_NOT_REPLACE);
break;
}
}
/// <summary>
/// Crop the range specified by the clip texture from the target texture.
/// </summary>
/// <param name="clipTexture">Texture used for clipping.</param>
/// <param name="clipScale">The ratio of the size of the clip texture to the target texture.</param>
/// <param name="grabTargetTexture">Texture of clipping target.</param>
/// <param name="targetUV">UV coordinates on the target texture.</param>
/// <param name="rotateAngle">Clip texture rotate angle.(degree)</param>
/// <param name="wrapMpde">Texture wrap mode.</param>
/// <param name="dst">Store cropped texture.</param>
/// <param name="replaceAlpha">Replace to clip textures alpha</param>
public static void Clip(Texture clipTexture, float clipScale, Texture grabTargetTexture, Vector2 targetUV, float rotateAngle, GrabTextureWrapMode wrapMode, RenderTexture dst, bool replaceAlpha = true)
{
if (grabAreaMaterial == null)
{
InitGrabAreaMaterial();
}
SetGrabAreaProperty(clipTexture, clipScale, grabTargetTexture, targetUV, rotateAngle, wrapMode, replaceAlpha);
var tmp = RenderTexture.GetTemporary(clipTexture.width, clipTexture.height, 0);
Graphics.Blit(clipTexture, tmp, grabAreaMaterial);
Graphics.Blit(tmp, dst);
RenderTexture.ReleaseTemporary(tmp);
}
