/// <summary>
/// Add a texture into the atlas.
/// </summary>
public bool AddTexture(CommandBuffer cmd, out Vector4 scaleOffset, Texture texture)
{
int key = texture.GetInstanceID();
if (!m_AllocationCache.TryGetValue(key, out scaleOffset))
{
int width = texture.width;
int height = texture.height;
if (m_AtlasAllocator.Allocate(out scaleOffset, key, width, height))
{
scaleOffset.Scale(new Vector4(1.0f / m_Width, 1.0f / m_Height, 1.0f / m_Width, 1.0f / m_Height));
for (int mipLevel = 0; mipLevel < (texture as Texture2D).mipmapCount; mipLevel++)
{
cmd.SetRenderTarget(m_AtlasTexture, mipLevel);
Blitter.BlitQuad(cmd, texture, new Vector4(1, 1, 0, 0), scaleOffset, mipLevel, false);
}
m_AllocationCache.Add(key, scaleOffset);
return(true);
}
else
{
return(false);
}
}
return(true);
}
void BlitOctahedralTexturePadding(CommandBuffer cmd, Vector4 scaleOffset, Texture texture, Vector4 sourceScaleOffset, bool blitMips = true)
{
int mipCount = GetTextureMipmapCount(texture.width, texture.height);
int pixelPadding = GetTexturePadding();
Vector2 textureSize = GetPowerOfTwoTextureSize(texture);
bool bilinear = texture.filterMode != FilterMode.Point;
if (!blitMips)
{
mipCount = 1;
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(CoreProfileId.BlitTextureInPotAtlas)))
{
for (int mipLevel = 0; mipLevel < mipCount; mipLevel++)
{
cmd.SetRenderTarget(m_AtlasTexture, mipLevel);
Blitter.BlitOctahedralWithPadding(cmd, texture, textureSize, sourceScaleOffset, scaleOffset, mipLevel, bilinear, pixelPadding);
}
}
}