//jpg转为透明png
static public Texture2D ConvertJpg2AlphaPng(Texture2D tex)
{
int w = tex.width;
int h = tex.height;
Texture2D texRet = new Texture2D(w, h, TextureFormat.ARGB32, false);
ColorImage colorImageRet = new ColorImage();
colorImageRet.Init(texRet);
ColorImage colorImage = new ColorImage();
colorImage.Init(tex);
for (int i = 0; i < w; i++)
{
for (int j = 0; j < h; j++)
{
Vector2 pt = new Vector2(i, j);
Color color = colorImage.GetImageColorOrigin(pt);
color.a = 1f;
colorImageRet.SetImageColor(pt, color);
}
}
colorImageRet.UpdateTexture();
return(texRet);
}
static public Rect GetRectNotAlpha(Texture2D tex)
{
int fillXLeft = tex.width;
int fillXRight = 0;
int fillYBottom = tex.height;
int fillYTop = 0;
int x, y, w, h;
ColorImage colorImage = new ColorImage();
colorImage.Init(tex);
for (int j = 0; j < tex.height; j++)
{
for (int i = 0; i < tex.width; i++)
{
Vector2 pt = new Vector2(i, j);
Color color = colorImage.GetImageColorOrigin(pt);
if (color.a >= 1f)
{
x = i;
y = j;
if (x < fillXLeft)
{
fillXLeft = x;
}
if (x > fillXRight)
{
fillXRight = x;
}
if (y < fillYBottom)
{
fillYBottom = y;
}
if (y > fillYTop)
{
fillYTop = y;
}
}
}
}
Debug.Log("tex.width=" + tex.width + " fillXLeft=" + fillXLeft + " fillXRight=" + fillXRight);
return(new Rect(fillXLeft, fillYBottom, (fillXRight - fillXLeft), (fillYTop - fillYBottom)));
}
Texture2D CreateTexTureBg(int w, int h)
{
Texture2D tex = new Texture2D(w, h, TextureFormat.ARGB32, false);
// return tex;
ColorImage crImage = new ColorImage();
crImage.Init(tex);
for (int j = 0; j < h; j++)
{
for (int i = 0; i < w; i++)
{
Vector2 pttmp = new Vector2(i, j);
Color colorpic = new Color(0f, 0f, 0f, 0f);
crImage.SetImageColor(pttmp, colorpic);
}
}
crImage.UpdateTexture();
return(tex);
}
