/// <summary>Do a texture lookup with projection. The texture coordinates consumed from P,
/// not including the last component of P, are divided by the last component of P.
/// The resulting 3rd component of P is used as Dref.
/// After these values are computed,texture lookup proceeds as in texture.</summary>
protected static float textureProj(sampler2DShadow sampler, vec4 P)
{
throw _invalidAccess;
}
protected float4 Shadow2DProj(sampler2DShadow sampler, float4 coord, float bias)
{
return(new float4(1, 1, 1, 1));
}
protected extern ivec2 textureSize(sampler2DShadow sampler, int lod);
/// <summary>
/// Do a texture lookup as in texture but with explicit LOD; lod specifies λbase and sets the partial derivatives as follows.
/// (See section 3.8.11 “Texture Minification” and equation 3.17 in the OpenGL Graphics SystemSpecification.)
/// ∂u/∂x = 0; ∂v/∂x = 0; ∂w/∂x = 0; ∂u/∂y = 0; ∂v/∂y = 0; ∂w/∂y = 0;
/// </summary>
protected static float textureLod(sampler2DShadow sampler, vec3 P, float lod)
{
throw _invalidAccess;
}
public static vec4 texture(Location location, sampler2DShadow sampler, vec3 P, float bias = 0)
{
return(new vec4(0));
}
protected static ivec2 textureSize(sampler2DShadow sampler, int lod)
{
throw _invalidAccess;
}
/// <summary> Do a texture lookup as in texture but with explicit gradients.
/// The partial derivatives of P are with respect to window x and window y.
/// ∂s/∂x = ∂P.s/∂x; ∂s/∂y = ∂P.s/∂y; ∂t/∂x = ∂P.t/∂x; ∂t/∂y = ∂P.t/∂y; ∂r/∂x = 0; ∂r/∂y = 0;</summary>
protected static float textureGrad(sampler2DShadow sampler, vec3 P, vec2 dPdx, vec2 dPdy)
{
throw _invalidAccess;
}
protected extern float textureProjGradOffset(sampler2DShadow sampler, vec4 p, vec2 dPdx, vec2 dPdy, ivec2 offset);
protected extern float texture(sampler2DShadow sampler, vec3 p, float bias = 0);
protected extern float textureProjLodOffset(sampler2DShadow sampler, vec4 p, float lod, ivec2 offset);
protected extern float textureProGrad(sampler2DShadow sampler, vec4 p, vec2 dPdx, vec2 dPdy);
protected extern float textureProjLod(sampler2DShadow sampler, vec4 p, float lod);
protected extern vec4 textureLodOffset(sampler2DShadow sampler, int p, int lod, ivec2 offset);
protected extern float textureProjOffset(sampler2DShadow sampler, vec4 p, ivec2 offset, float bias = 0);
/// <summary> Do a projective texture lookup as described in textureProj offset by offset as described in textureOffset. </summary>
protected static float textureProjOffset(sampler2DShadow sampler, vec4 P, ivec2 offset, float bias)
{
throw _invalidAccess;
}
protected extern float textureProj(sampler2DShadow sampler, vec2 p, float bias = 0);
/// <summary>
/// Returns the mipmap array(s) that would be accessed in the x component of the return value.
/// Returns the computed level of detail relative to the base level in the y component of the return value.
/// If called on an incomplete texture, the results are undefined.
/// </summary>
protected static vec2 textureQueryLod(sampler2DShadow sampler, vec2 P)
{
throw _invalidAccess;
}
/// <summary> Do a texture lookup as in texture but with offset added to the (u,v,w) texel coordinates before looking up each texel.
/// The offset value must be a constant expression. A limited range of offset values are supported;
/// the minimum and maximum offset values are implementation-dependent and given by MIN_PROGRAM_TEXEL_OFFSET and MAX_PROGRAM_TEXEL_OFFSET, respectively.
/// Note that offset does not apply to the layer coordinate for texture arrays. This is explained in detail in section 3.8.11
/// “Texture Minification” of the OpenGL Graphics System Specification, where offset is (∂u ,∂v ,∂w).
/// </summary>
protected internal static float TextureOffset(sampler2DShadow sampler, vec3 P, ivec2 offset, float bias)
{
throw _invalidAccess;
}
/// <summary>
/// Use the texture coordinate P to do a texture lookup in the texture currently bound to sampler.
/// When compare is present, it is used as Dref and the array layer comes from P.w.
/// When compare is not present, the last component of P is used as Dref and
/// the array layer comes from the second to last component of P.
/// (The second component of P isunused for 1D shadow lookups.)
/// </summary>
protected static float texture(sampler2DShadow sampler, vec3 P, float bias)
{
throw _invalidAccess;
}
/// <summary>Do a texture lookup both projectively, as described in TextureProj, and with explicit gradient as
/// described in TextureGrad. The partial derivatives dPdx and dPdy are assumed to be already projected.</summary>
protected internal static float TextureProjGrad(sampler2DShadow sampler, vec4 P, vec2 dPdx, vec2 dPdy)
{
throw _invalidAccess;
}
/// <summary>Do a texture lookup with both explicit gradient and offset, as described in textureGrad and textureOffset. </summary>
protected static float textureGradOffset(sampler2DShadow sampler, vec3 P, vec2 dPdx, vec2 dPdy, ivec2 offset)
{
throw _invalidAccess;
}
/// <summary> Do an offset texture lookup with explicit LOD. See TextureLod and TextureOffset.</summary>
protected internal static float TextureProjLod(sampler2DShadow sampler, vec4 P, float lod)
{
throw _invalidAccess;
}
/// <summary> Do an offset texture lookup with explicit LOD. See textureLod and textureOffset.</summary>
protected static float textureLodOffset(sampler2DShadow sampler, vec3 P, float lod, ivec2 offset)
{
throw _invalidAccess;
}
/// <summary> Do a projective texture lookup as described in TextureProj offset by offset as described in TextureOffset. </summary>
protected internal static float TextureProjOffset(sampler2DShadow sampler, vec4 P, ivec2 offset)
{
throw _invalidAccess;
}
protected float4 Shadow2D(sampler2DShadow sampler, float3 coord)
{
return(new float4(1, 1, 1, 1));
}
/// <summary>
/// Use the texture coordinate P to do a texture lookup in the texture currently bound to sampler.
/// When compare is present, it is used as Dref and the array layer comes from P.w.
/// When compare is not present, the last component of P is used as Dref and
/// the array layer comes from the second to last component of P.
/// (The second component of P isunused for 1D shadow lookups.)
/// </summary>
protected internal static float Texture(sampler2DShadow sampler, vec3 P)
{
throw _invalidAccess;
}
protected float4 Shadow2DProjLod(sampler2DShadow sampler, float4 coord, float lod)
{
return(new float4(1, 1, 1, 1));
}
protected extern float textureLod(sampler2DShadow sampler, vec3 p, float lod);
