/// <inheritdoc/>
public void SetTexture(Int32 sampler, Texture texture)
{
Contract.EnsureRange(sampler >= 0 && sampler < maxTextureStages, nameof(sampler));
Contract.EnsureNotDisposed(this, Disposed);
Ultraviolet.ValidateResource(texture);
if (texture != null && texture.BoundForWriting)
{
throw new InvalidOperationException(OpenGLStrings.RenderBufferCannotBeUsedAsTexture);
}
if (texture != null && texture.WillNotBeSampled)
{
throw new InvalidOperationException(OpenGLStrings.RenderBufferWillNotBeSampled);
}
if (this.textures[sampler] != texture)
{
var textureName = (texture == null) ? 0 : ((IOpenGLResource)texture).OpenGLName;
OpenGLState.ActiveTexture((uint)(gl.GL_TEXTURE0 + sampler));
if (texture is Texture3D)
{
OpenGLState.BindTexture3D(textureName);
}
else
{
OpenGLState.BindTexture2D(textureName);
}
if (this.textures[sampler] != null)
{
((IBindableResource)this.textures[sampler]).UnbindRead();
}
this.textures[sampler] = texture;
if (this.textures[sampler] != null)
{
((IBindableResource)this.textures[sampler]).BindRead();
if (texture is IOpenGLDynamicTexture textdyn)
{
textdyn.Flush();
}
}
if (!capabilities.SupportsIndependentSamplerState)
{
var samplerState = (OpenGLSamplerState)(GetSamplerState(sampler) ?? SamplerState.LinearClamp);
for (int i = 0; i < samplerStates.Length; i++)
{
if (this.textures[i] == texture)
{
var target = (texture is Texture3D) ? gl.GL_TEXTURE_3D : gl.GL_TEXTURE_2D;
samplerState.Apply(sampler, target);
}
}
}
}
}
