private static Texture2D BuildAtlasWithEncodedSettings(GradientSettings[] settings, Texture2D atlas)
{
var oldActive = RenderTexture.active;
int width = atlas.width + 3;
int height = Math.Max(settings.Length, atlas.height);
var desc = new RenderTextureDescriptor(width, height, RenderTextureFormat.ARGB32, 0)
{
sRGB = QualitySettings.activeColorSpace == ColorSpace.Linear
};
var rt = RenderTexture.GetTemporary(desc);
GL.Clear(false, true, Color.black, 1.0f);
Graphics.Blit(atlas, rt, Vector2.one, new Vector2(-3.0f / width, 0.0f));
RenderTexture.active = rt;
Texture2D copy = new Texture2D(width, height, TextureFormat.RGBA32, false);
copy.hideFlags = HideFlags.HideAndDontSave;
copy.ReadPixels(new Rect(0, 0, width, height), 0, 0);
// This encoding procedure is duplicated a few times, do something about it
var rawSettingsTex = new VectorUtils.RawTexture()
{
Width = 3, Height = settings.Length,
Rgba = new Color32[3 * settings.Length]
};
for (int i = 0; i < settings.Length; ++i)
{
var g = settings[i];
// There are 3 consecutive pixels to store the settings
int destX = 0;
int destY = i;
if (g.gradientType == GradientType.Radial)
{
var focus = g.radialFocus;
focus += Vector2.one;
focus /= 2.0f;
focus.y = 1.0f - focus.y;
VectorUtils.WriteRawFloat4Packed(rawSettingsTex, ((float)g.gradientType) / 255, ((float)g.addressMode) / 255, focus.x, focus.y, destX++, destY);
}
else
{
VectorUtils.WriteRawFloat4Packed(rawSettingsTex, 0.0f, ((float)g.addressMode) / 255, 0.0f, 0.0f, destX++, destY);
}
var pos = g.location.position;
var size = g.location.size;
size.x -= 1;
size.y -= 1;
VectorUtils.WriteRawInt2Packed(rawSettingsTex, (int)pos.x + 3, (int)pos.y, destX++, destY);
VectorUtils.WriteRawInt2Packed(rawSettingsTex, (int)size.x, (int)size.y, destX++, destY);
}
copy.SetPixels32(0, 0, 3, settings.Length, rawSettingsTex.Rgba, 0);
copy.Apply();
RenderTexture.active = oldActive;
RenderTexture.ReleaseTemporary(rt);
return(copy);
}
