DECLARATION

gvec4 textureProjGradOffset(gsampler1D sampler, vec2 P, float dPdx, float dPdy, int offset);

gvec4 textureProjGradOffset(gsampler1D sampler, vec4 P, float dPdx, float dPdy, int offset);

gvec4 textureProjGradOffset(gsampler2D sampler, vec3 P, vec2 dPdx, vec2 dPdy, ivec2 offset);

gvec4 textureProjGradOffset(gsampler2D sampler, vec4 P, vec2 dPdx, vec2 dPdy, ivec2 offset);

gvec4 textureProjGradOffset(gsampler3D sampler, vec4 P, vec3 dPdx, vec3 dPdy, ivec3 offset);

float textureProjGradOffset(sampler1DShadow sampler, vec4 P, float dPdx, float dPdy, int offset);

float textureProjGradOffset(sampler2DShadow sampler, vec4 P, vec2 dPdx, vec2 dPdy, ivec2 offset);

gvec4 textureProjGradOffset(gsampler2DRect sampler, vec3 P, vec2 dPdx, vec2 dPdy, ivec2 offset);

gvec4 textureProjGradOffset(gsampler2DRect sampler, vec4 P, vec2 dPdx, vec2 dPdy, ivec2 offset);

float textureProjGradOffset(gsampler2DRectShadow sampler, vec4 P, vec2 dPdx, vec2 dPdy, ivec2 offset);

PARAMETERS

sampler

Specifies the sampler to which the texture from which texels will be retrieved is bound.

P

Specifies the texture coordinates at which texture will be sampled.

dPdx

Specifies the partial derivative of P with respect to window x.

dPdy

Specifies the partial derivative of P with respect to window y.

offset

Specifies the offsets, in texels at which the texture will be sampled relative to the projection of P.

DESCRIPTION

textureProjGradOffset performs a texture lookup with projection and explicit gradients and offsets. 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 in the shadow forms is used as Dref. After these values are computed, the texture lookup proceeds as in textureGradOffset(), passing dPdx and dPdy as gradients, and offset as the offset.

VERSION SUPPORT

	OpenGL Shading Language Version
Function Name	1.10	1.20	1.30	1.40	1.50	3.30	4.00	4.10	4.20	4.30	4.40	4.50
textureProjGradOffset	-	-	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔
textureProjGradOffset (gsampler2DRect{Shadow})	-	-	-	✔	✔	✔	✔	✔	✔	✔	✔	✔

COPYRIGHT

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. m[blue]http://opencontent.org/openpub/m[].

COPYRIGHT

Copyright © 2011-2014 Khronos Group