| Name |
| |
| NV_texture_shader2 |
| |
| Name Strings |
| |
| GL_NV_texture_shader2 |
| |
| Contact |
| |
| Mark J. Kilgard, NVIDIA Corporation (mjk 'at' nvidia.com) |
| |
| Notice |
| |
| Copyright NVIDIA Corporation, 1999, 2000, 2001. |
| |
| IP Status |
| |
| NVIDIA Proprietary. |
| |
| Version |
| |
| NVIDIA Date: April 29, 2004 |
| Version: 9 |
| |
| Number |
| |
| 231 |
| |
| Dependencies |
| |
| Written based on the wording of the OpenGL 1.2.1 specification, |
| augmented by the NV_texture_shader extension specification. |
| |
| Requires support for the NV_texture_shader extension. |
| |
| Overview |
| |
| This extension extends the NV_texture_shader functionality to |
| support texture shader operations for 3D textures. |
| |
| See the NV_texture_shader extension for information about the |
| texture shader operational model. |
| |
| The two new texture shader operations are: |
| |
| <conventional textures> |
| |
| 22. TEXTURE_3D - Accesses a 3D texture via (s/q,t/q,r/q). |
| |
| <dot product textures> |
| |
| 23. DOT_PRODUCT_TEXTURE_3D_NV - When preceded by two DOT_PRODUCT_NV |
| programs in the previous two texture shader stages, computes a |
| third similar dot product and composes the three dot products |
| into (s,t,r) texture coordinate set to access a 3D non-projective |
| texture. |
| |
| Issues |
| |
| Why a separate extension? |
| |
| Not all implementations of NV_texture_shader will support 3D |
| textures in hardware. |
| |
| Breaking this extension out into a distinct extension allows OpenGL |
| programs that only would use 3D textures if they are supported |
| in hardware to determine whether hardware support is available by |
| explicitly looking for the NV_texture_shader2 extension. |
| |
| What if an implementation wanted to support NV_texture_shader2 |
| operations within a software rasterizer? |
| |
| Implementations should be free to implement the 3D texture texture |
| shader operations in software. In this case, the implementation |
| should NOT advertise the NV_texture_shader2 extension, but should |
| still accept the GL_TEXTURE_3D and GL_DOT_PRODUCT_TEXTURE_3D_NV |
| texture shader operations without an error. Likewise, the |
| glTexImage3D command should accept the new internal texture formats, |
| formats, and types allowed by this extension should be accepted |
| without an error. |
| |
| When NV_texture_shader2 is not advertised in the GL_EXTENSIONS |
| string, but the extension functionality works without GL errors, |
| programs should expect that these two texture shader operations |
| are slow. |
| |
| New Procedures and Functions |
| |
| None. |
| |
| New Tokens |
| |
| When the <target> and <pname> parameters of TexEnvf, TexEnvfv, |
| TexEnvi, and TexEnviv are TEXTURE_SHADER_NV and SHADER_OPERATION_NV |
| respectively, then the value of <param> or the value pointed to by |
| <params> may be: |
| |
| TEXTURE_3D |
| DOT_PRODUCT_TEXTURE_3D_NV 0x86EF |
| |
| Accepted by the <format> parameter of TexImage3D and TexSubImage3D: |
| |
| HILO_NV 0x86F4 |
| DSDT_NV 0x86F5 |
| DSDT_MAG_NV 0x86F6 |
| DSDT_MAG_VIB_NV 0x86F7 |
| |
| Accepted by the <type> parameter of TexImage3D and TexSubImage3D: |
| |
| UNSIGNED_INT_S8_S8_8_8_NV 0x86DA |
| UNSIGNED_INT_8_8_S8_S8_REV_NV 0x86DB |
| |
| Accepted by the <internalformat> parameter of TexImage3D: |
| |
| SIGNED_RGBA_NV 0x86FB |
| SIGNED_RGBA8_NV 0x86FC |
| SIGNED_RGB_NV 0x86FE |
| SIGNED_RGB8_NV 0x86FF |
| SIGNED_LUMINANCE_NV 0x8701 |
| SIGNED_LUMINANCE8_NV 0x8702 |
| SIGNED_LUMINANCE_ALPHA_NV 0x8703 |
| SIGNED_LUMINANCE8_ALPHA8_NV 0x8704 |
| SIGNED_ALPHA_NV 0x8705 |
| SIGNED_ALPHA8_NV 0x8706 |
| SIGNED_INTENSITY_NV 0x8707 |
| SIGNED_INTENSITY8_NV 0x8708 |
| SIGNED_RGB_UNSIGNED_ALPHA_NV 0x870C |
| SIGNED_RGB8_UNSIGNED_ALPHA8_NV 0x870D |
| |
| Accepted by the <internalformat> parameter of TexImage3D: |
| |
| HILO_NV |
| HILO16_NV 0x86F8 |
| SIGNED_HILO_NV 0x86F9 |
| SIGNED_HILO16_NV 0x86FA |
| DSDT_NV |
| DSDT8_NV 0x8709 |
| DSDT_MAG_NV |
| DSDT8_MAG8_NV 0x870A |
| DSDT_MAG_INTENSITY_NV 0x86DC |
| DSDT8_MAG8_INTENSITY8_NV 0x870B |
| |
| Additions to Chapter 2 of the 1.2 Specification (OpenGL Operation) |
| |
| None |
| |
| Additions to Chapter 3 of the 1.2 Specification (Rasterization) |
| |
| -- Section 3.8 "Texturing" |
| |
| Replace the third paragraph (amended by the NV_texture_shader |
| extension) with the following that includes 3D texture references: |
| |
| "The alternative to conventional texturing is the texture shaders |
| mechanism. When texture shaders are enabled, each texture unit |
| uses one of twenty-three texture shader operations. Twenty of the |
| twenty-three shader operations map an (s,t,r,q) texture coordinate |
| set to an RGBA color. Of these, four texture shader operations |
| directly correspond to the 1D, 2D, 3D, and cube map conventional |
| texturing operations. Depending on the texture shader operation, |
| the mapping from the (s,t,r,q) texture coordinate set to an RGBA |
| color may depend on the given texture unit's currently bound |
| texture object state and/or the results of previous texture |
| shader operations. The three remaining texture shader operations |
| respectively provide a fragment culling mechanism based on texture |
| coordinates, a means to replace the fragment depth value, and a dot |
| product operation that computes a floating-point value for use by |
| subsequent texture shaders. The specifics of each texture shader |
| operation are described in section 3.8.12." |
| |
| -- Section 3.8.2 "Alternate Texture Image Specification Commands" |
| |
| Amend the following text inserted by NV_texture_shader after the |
| six paragraph to include 3D texture references: |
| |
| "CopyTexSubImage3D, CopyTexSubImage2D, and CopyTexSubImage1D generate |
| the error INVALID_OPERATION if the internal format of the texture |
| array to which the pixels are to be copied is one of HILO_NV, |
| HILO16_NV, SIGNED_HILO_NV, SIGNED_HILO16_NV, DSDT_NV, DSDT8_NV, |
| DSDT_MAG_NV, DSDT8_MAG8_NV, DSDT_MAG_INTENSITY_NV, or |
| DSDT8_MAG8_INTENSITY8_NV. |
| |
| TexSubImage3D, TexSubImage2D, and TexSubImage1D generate the error |
| INVALID_OPERATION if the internal format of the texture array |
| to which the texels are to be copied has a different format type |
| (according to table 3.15) than the format type of the texels being |
| specified. Specifically, if the base internal format is not one of |
| HILO_NV, DSDT_NV, DSDT_MAG_NV, or DSDT_INTENSITY_NV, then the format |
| parameter must be one of COLOR_INDEX, RED, GREEN, BLUE, ALPHA, |
| RGB, RGBA, LUMINANCE, or LUMINANCE_ALPHA; if the base internal |
| format is HILO_NV, then the format parameter must be HILO_NV; |
| if the base internal format is DSDT_NV, then the format parameter |
| must be DSDT_NV; if the base internal format is DSDT_MAG_NV, then |
| the format parameter must be DSDT_MAG_NV; if the base internal |
| format is DSDT_MAG_INTENSITY_NV, the format parameter must be |
| DSDT_MAG_VIB_NV." |
| |
| -- Section 3.8.13 "Texture Shaders" |
| |
| Amend the designated paragraphs of the NV_texture_shader |
| specification to include discussion of 3D textures. |
| |
| 1st paragraph: |
| |
| "Each texture unit is configured with one of twenty-three |
| texture shader operations. Several texture shader operations |
| require additional state. All per-texture shader stage state |
| is specified using the TexEnv commands with the target specified |
| as TEXTURE_SHADER_NV. The per-texture shader state is replicated |
| per texture unit so the texture unit selected by ActiveTextureARB |
| determines which texture unit's environment is modified by TexEnv |
| calls." |
| |
| 3rd paragraph: |
| |
| "When TexEnv is called with the target of TEXTURE_SHADER_NV, |
| SHADER_OPERATION_NV may be set to one of NONE, TEXTURE_1D, |
| TEXTURE_2D, TEXTURE_3D, TEXTURE_CUBE_MAP_ARB, PASS_THROUGH_NV, |
| CULL_FRAGMENT_NV, OFFSET_TEXTURE_2D_NV, OFFSET_TEXTURE_2D_SCALE_NV, |
| OFFSET_TEXTURE_RECTANGLE_NV, OFFSET_TEXTURE_RECTANGLE_SCALE_NV, |
| DEPENDENT_AR_TEXTURE_2D_NV, DEPENDENT_GB_TEXTURE_2D_NV, |
| DOT_PRODUCT_NV, DOT_PRODUCT_DEPTH_REPLACE_NV, |
| DOT_PRODUCT_TEXTURE_2D_NV, DOT_PRODUCT_TEXTURE_RECTANGLE_NV, |
| DOT_PRODUCT_TEXTURE_3D_NV, DOT_PRODUCT_TEXTURE_CUBE_MAP_NV, |
| DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV, DOT_PRODUCT_REFLECT_CUBE_MAP_NV, or |
| DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV. The semantics of each of |
| these shader operations is described in section 3.8.13.1. Not every |
| operation is supported in every texture unit. The restrictions for |
| how these shader operations can be configured in various texture |
| units are described in section 3.8.13.2." |
| |
| 3.8.13.1 Texture Shader Operations |
| |
| Amend tables 3.A, 3.B, 3.C, and 3.D in the NV_texture_shader |
| specification to include entries for 3D texture operations: |
| |
| Table 3.A: |
| |
| texture shader |
| texture shader operation i previous texture input texture shader operation i-1 operation i-2 texture shader operation i+1 |
| ================================= ========================= =============================== ================ ================================ |
| TEXTURE_3D - - - - |
| --------------------------------- ------------------------- ------------------------------- ---------------- -------------------------------- |
| DOT_PRODUCT_TEXTURE_3D_NV shader result type must shader operation shader operation - |
| be one of signed HILO, must be must be |
| unsigned HILO, all DOT_PRODUCT_NV DOT_PRODUCT_NV |
| signed RGBA, all |
| unsigned RGBA |
| --------------------------------- ------------------------- ------------------------------- ---------------- -------------------------------- |
| |
| Table 3.B: |
| |
| texture shader operation i texture unit i |
| ================================= ======================================= |
| TEXTURE_3D 3D target must be consistent |
| --------------------------------- --------------------------------------- |
| DOT_PRODUCT_TEXTURE_3D_NV 3D target must be consistent |
| --------------------------------- --------------------------------------- |
| |
| Table 3.C: |
| |
| uses uses uses uses uses offset uses |
| texture stage stage stage previous uses offset texture const |
| coordinate texture result result result texture cull texture 2D scale eye |
| texture shader operation i set usage target i-1 i-2 i+1 input modes 2D matrix and bias vector |
| ================================= ========== ========= ====== ====== ====== ======== ===== ========= ======== ====== |
| TEXTURE_3D s,t,r,q 3D - - - - - - - - |
| --------------------------------- ---------- --------- ------ ------ ------ -------- ----- --------- -------- ------ |
| DOT_PRODUCT_TEXTURE_3D_NV s,t,r 3D y y - y - - - - |
| --------------------------------- ---------- --------- ------ ------ ------ -------- ----- --------- -------- ------ |
| |
| Table 3.D: |
| |
| texture shader operation i shader stage result type shader stage result texture unit RGBA color result |
| ================================= ============================= =================================== ====================================== |
| TEXTURE_3D matches 3D target type filtered 3D target texel if 3D target texture type is RGBA, |
| filtered 3D target texel, |
| else (0,0,0,0) |
| --------------------------------- ----------------------------- ----------------------------------- -------------------------------------- |
| DOT_PRODUCT_TEXTURE_3D_NV matches 3D target type filtered 3D target texel if 3D target texture type is RGBA, |
| filtered 3D target texel, |
| else (0,0,0,0) |
| ------------------------------- ----------------------------- ----------------------------------- -------------------------------------- |
| |
| Add the following new sections specifying new 3D texture operations: |
| |
| 3.8.13.1.22 3D Projective Texturing |
| |
| The TEXTURE_3D texture shader operation accesses the texture unit's |
| 3D texture object (as described in sections 3.8.4, 3.8.5, and 3.8.6) |
| using (s/q,t/q,r/q) for the 3D texture coordinates where s, t, r, |
| and q are the homogeneous texture coordinates for the texture unit. |
| The result of the texture access becomes both the shader result and |
| texture unit RGBA result (see table 3.E). The type of the shader |
| result depends on the format type of the accessed texture. This mode |
| is equivalent to conventional texturing's 3D texture target. |
| |
| If the texture unit's 3D texture object is not consistent, then |
| this texture shader stage is not consistent. |
| |
| If this texture shader stage is not consistent, it operates as if |
| it is the NONE operation. |
| |
| 3.8.13.1.23 Dot Product Texture 3D |
| |
| The DOT_PRODUCT_TEXTURE_3D_NV texture shader operation accesses the |
| texture unit's 3D texture object (as described in sections 3.8.4, |
| 3.8.5, and 3.8.6) using (dotPP,dotP,dotC) for the 3D texture |
| coordinates. The result of the texture access becomes both |
| the shader result and texture unit RGBA result (see table 3.E). |
| The type of the shader result depends on the format type of the |
| accessed texture. |
| |
| Assuming that i is the current texture shader stage, dotPP is the |
| floating-point dot product texture shader result from the i-2 |
| texture shader stage, assuming the i-2 texture shader stage's |
| operation is DOT_PRODUCT_NV. dotP is the floating-point dot |
| product texture shader result from the i-1 texture shader stage, |
| assuming the i-1 texture shader stage's operation is DOT_PRODUCT_NV. |
| dotC is the floating-point dot product result from the current |
| texture shader stage. dotC is computed in the identical manner |
| used to compute the floating-point result of the DOT_PRODUCT_NV |
| texture shader described in section 3.8.13.1.14. |
| |
| If the previous texture input texture object specified by the |
| current texture shader stage's PREVIOUS_TEXTURE_INPUT_NV value has |
| a format type other than RGBA or HILO (the DSDT_MAG_INTENSITY_NV |
| base internal format does not count as an RGBA format type in this |
| context), then this texture shader stage is not consistent. |
| |
| If the previous texture input texture shader operation specified by |
| the current texture shader stage's PREVIOUS_TEXTURE_INPUT_NV value |
| is DOT_PRODUCT_NV, then this texture shader stage is not consistent. |
| |
| If the previous texture input texture shader result specified by |
| the current texture shader stage's PREVIOUS_TEXTURE_INPUT_NV value |
| is invalid, then this texture shader stage is not consistent. |
| |
| If the previous texture input shader stage specified by the current |
| texture shader stage's PREVIOUS_TEXTURE_INPUT_NV value is not |
| consistent, then this texture shader stage is not consistent. |
| |
| If either the i-1 or i-2 texture shader stage operation is not |
| DOT_PRODUCT_NV, then this texture shader stage is not consistent. |
| |
| If either the i-1 or i-2 texture shader stage is not consistent, then |
| this texture shader stage is not consistent. |
| |
| If the texture unit's 3D texture object is not consistent, then |
| this texture shader stage is not consistent. |
| |
| If this texture shader stage is not consistent, it operates as if |
| it is the NONE operation. |
| |
| 3.8.13.2 Texture Shader Restrictions |
| |
| Amend the first four paragraphs in this section to include 3D |
| texture operations: |
| |
| "There are various restrictions on possible texture shader |
| configurations. These restrictions are described in this section. |
| |
| The error INVALID_OPERATION occurs if the SHADER_OPERATION_NV |
| parameter for texture unit 0 is assigned one of |
| OFFSET_TEXTURE_2D_NV, OFFSET_TEXTURE_2D_SCALE_NV, |
| OFFSET_TEXTURE_RECTANGLE_NV, OFFSET_TEXTURE_RECTANGLE_SCALE_NV, |
| DEPENDENT_AR_TEXTURE_2D_NV, DEPENDENT_GB_TEXTURE_2D_NV, |
| DOT_PRODUCT_NV, DOT_PRODUCT_DEPTH_REPLACE_NV, |
| DOT_PRODUCT_TEXTURE_2D_NV, DOT_PRODUCT_TEXTURE_RECTANGLE_NV, |
| DOT_PRODUCT_TEXTURE_3D_NV, DOT_PRODUCT_TEXTURE_CUBE_MAP_NV, |
| DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV, DOT_PRODUCT_REFLECT_CUBE_MAP_NV, |
| or DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV. Each of these |
| texture shaders requires a previous texture shader result that |
| is not possible for texture unit 0. Therefore these shaders are |
| disallowed for texture unit 0. |
| |
| The error INVALID_OPERATION occurs if the |
| SHADER_OPERATION_NV parameter for texture unit |
| 1 is assigned one of DOT_PRODUCT_DEPTH_REPLACE_NV, |
| DOT_PRODUCT_TEXTURE_2D_NV, DOT_PRODUCT_TEXTURE_RECTANGLE_NV, |
| DOT_PRODUCT_TEXTURE_3D_NV, DOT_PRODUCT_TEXTURE_CUBE_MAP_NV, |
| DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV, DOT_PRODUCT_REFLECT_CUBE_MAP_NV, |
| or DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV. Each of these texture |
| shaders requires either two previous texture shader results or |
| a dot product result that cannot be generated by texture unit 0. |
| Therefore these shaders are disallowed for texture unit 1. |
| |
| The error INVALID_OPERATION occurs if the |
| SHADER_OPERATION_NV parameter for texture unit |
| 2 is assigned one of DOT_PRODUCT_TEXTURE_3D_NV, |
| DOT_PRODUCT_TEXTURE_CUBE_MAP_NV, DOT_PRODUCT_REFLECT_CUBE_MAP_NV, |
| DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV. Each of these texture |
| shaders requires three previous texture shader results. Therefore |
| these shaders are disallowed for texture unit 2." |
| |
| 3.8.13.3 Required State |
| |
| Amend the first paragraph in this section to account for the 2 new |
| 3D texture shader operations: |
| |
| "The state required for texture shaders consists of a single bit to |
| indicate whether or not texture shaders are enabled, a vector of |
| three floating-point values for the constant eye vector, and n sets |
| of per-texture unit state where n is the implementation-dependent |
| number of supported texture units. The set of per-texture unit |
| texture shader state consists of the twenty-three-valued integer |
| indicating the texture shader operation, four two-valued integers |
| indicating the cull modes, an integer indicating the previous texture |
| unit input, a two-valued integer indicating the RGBA unsigned dot |
| product mapping mode, a 2x2 floating-point matrix indicating the |
| texture offset transform, a floating-point value indicating the |
| texture offset scale, a floating-point value indicating the texture |
| offset bias, and a bit to indicate whether or not the texture shader |
| stage is consistent." |
| |
| Additions to Chapter 4 of the 1.2 Specification (Per-Fragment Operations |
| and the Frame Buffer) |
| |
| None |
| |
| Additions to Chapter 5 of the 1.2 Specification (Special Functions) |
| |
| None |
| |
| Additions to Chapter 6 of the 1.2 Specification (State and State Requests) |
| |
| None |
| |
| Additions to the GLX Specification |
| |
| None |
| |
| Dependencies on other specifications |
| |
| Same as the NV_texture_shader extension. |
| |
| Errors |
| |
| The following errors are updated to reflect 3D texture operations: |
| |
| INVALID_OPERATION is generated if a packed pixel format type listed |
| in table 3.8 is used with DrawPixels, ReadPixels, ColorTable, |
| ColorSubTable, ConvolutionFilter1D, ConvolutionFilter2D, |
| SeparableFilter2D, GetColorTable, GetConvolutionFilter, |
| GetSeparableFilter, GetHistogram, GetMinmax, TexImage1D, TexImage2D, |
| TexImage3D, TexSubImage1D, TexSubImage2D, TexSubImage3d, or |
| GetTexImage but the format parameter does not match on of the allowed |
| Matching Pixel Formats listed in table 3.8 for the specified packed |
| type parameter. |
| |
| INVALID_OPERATION is generated when TexImage1D, TexImage2D, |
| or TexImage3D are called and the format is HILO_NV and the |
| internalformat is not one of HILO_NV, HILO16_NV, SIGNED_HILO_NV, |
| SIGNED_HILO16_NV; or if the internalformat is one of HILO_NV, |
| HILO16_NV, SIGNED_HILO_NV, or SIGNED_HILO16_NV and the format is |
| not HILO_NV. |
| |
| INVALID_OPERATION is generated when TexImage3D, TexImage2D, |
| or TexImage1D is called and if the format is DSDT_NV and the |
| internalformat is not either DSDT_NV or DSDT8_NV; or if the internal |
| format is either DSDT_NV or DSDT8_NV and the format is not DSDT_NV. |
| |
| INVALID_OPERATION is generated when TexImage3D, TexImage2D, or |
| TexImage1D is called and if the format is DSDT_MAG_NV and the |
| internalformat is not either DSDT_MAG_NV or DSDT8_MAG8_NV; or if |
| the internal format is either DSDT_MAG_NV or DSDT8_MAG8_NV and the |
| format is not DSDT_MAG_NV. |
| |
| INVALID_OPERATION is generated when TexImage3D, TexImage2D, |
| or TexImage1D is called and if the format is DSDT_MAG_VIB_NV |
| and the internalformat is not either DSDT_MAG_INTENSITY_NV or |
| DSDT8_MAG8_INTENSITY8_NV; or if the internal format is either |
| DSDT_MAG_INTENSITY_NV or DSDT8_MAG8_INTENSITY8_NV and the format |
| is not DSDT_MAG_VIB_NV. |
| |
| INVALID_OPERATION is generated when CopyTexImage2D, CopyTexImage1D, |
| CopyTexSubImage3D, CopyTexSubImage2D, or CopyTexSubImage1D is called |
| and the internal format of the texture array to which the pixels |
| are to be copied is one of HILO_NV, HILO16_NV, SIGNED_HILO_NV, |
| SIGNED_HILO16_NV, DSDT_NV, DSDT8_NV, DSDT_MAG_NV, DSDT8_MAG8_NV, |
| DSDT_MAG_INTENSITY_NV, or DSDT8_MAG8_INTENSITY8_NV. |
| |
| INVALID_OPERATION is generated when TexSubImage3D, TexSubImage2D, or |
| TexSubImage1D is called and the texture array's base internal format |
| is not one of HILO_NV, DSDT_NV, DSDT_MAG_NV, or DSDT_INTENSITY_NV, |
| and the format parameter is not one of COLOR_INDEX, RED, |
| GREEN, BLUE, ALPHA, RGB, RGBA, LUMINANCE, or |
| LUMINANCE_ALPHA |
| |
| INVALID_OPERATION is generated when TexSubImage3D, TexSubImage2D, or |
| TexSubImage1D is called and the texture array's base internal format |
| is HILO_NV and the format parameter is not HILO_NV. |
| |
| INVALID_OPERATION is generated when TexSubImage3D, TexSubImage2D, or |
| TexSubImage1D is called and the texture array's base internal format |
| is DSDT_NV and the format parameter is not DSDT_NV. |
| |
| INVALID_OPERATION is generated when TexSubImage3D, TexSubImage2D, or |
| TexSubImage1D is called and the texture array's base internal format |
| is DSDT_MAG_NV and the format parameter is not DSDT_MAG_NV. |
| |
| INVALID_OPERATION is generated when TexSubImage3D, TexSubImage2D, |
| or TexSubImage1D is called and the texture array's base internal |
| format is DSDT_MAG_INTENSITY_NV and the format parameter is not |
| DSDT_MAG_VIRBANCE_NV. |
| |
| INVALID_OPERATION is generated when TexEnv is called and the |
| SHADER_OPERATION_NV parameter for texture unit 0 is assigned |
| one of OFFSET_TEXTURE_2D_NV, OFFSET_TEXTURE_2D_SCALE_NV, |
| OFFSET_TEXTURE_RECTANGLE_NV, OFFSET_TEXTURE_RECTANGLE_SCALE_NV, |
| DEPENDENT_AR_TEXTURE_2D_NV, DEPENDENT_GB_TEXTURE_2D_NV, |
| DOT_PRODUCT_NV, DOT_PRODUCT_DEPTH_REPLACE_NV, |
| DOT_PRODUCT_TEXTURE_2D_NV, DOT_PRODUCT_TEXTURE_RECTANGLE_NV, |
| DOT_PRODUCT_TEXTURE_3D_NV, DOT_PRODUCT_TEXTURE_CUBE_MAP_NV, |
| DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV, DOT_PRODUCT_REFLECT_CUBE_MAP_NV. |
| or DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV. |
| |
| INVALID_OPERATION is generated when TexEnv is called |
| and the SHADER_OPERATION_NV parameter for texture |
| unit 1 is assigned one of DOT_PRODUCT_DEPTH_REPLACE_NV, |
| DOT_PRODUCT_TEXTURE_2D_NV, DOT_PRODUCT_TEXTURE_RECTANGLE_NV, |
| DOT_PRODUCT_TEXTURE_3D_NV, DOT_PRODUCT_TEXTURE_CUBE_MAP_NV, |
| DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV, DOT_PRODUCT_REFLECT_CUBE_MAP_NV, |
| or DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV. |
| |
| INVALID_OPERATION is generated when TexEnv is called |
| and the SHADER_OPERATION_NV parameter for texture |
| unit 2 is assigned one of DOT_PRODUCT_TEXTURE_3D_NV, |
| DOT_PRODUCT_TEXTURE_CUBE_MAP_NV, DOT_PRODUCT_REFLECT_CUBE_MAP_NV, |
| or DOT_PRODUCT_CONST_EYE_REFLECT_CUBE_MAP_NV. |
| |
| INVALID_OPERATION is generated when TexEnv is called and the |
| SHADER_OPERATION_NV parameter for texture unit n-1 (where n is the |
| number of supported texture units) is assigned either DOT_PRODUCT_NV |
| or DOT_PRODUCT_DIFFUSE_CUBE_MAP_NV. |
| |
| INVALID_OPERATION is generated when GetTexImage is called with a |
| color format (one of RED, GREEN, BLUE, ALPHA, RGB, RGBA, LUMINANCE, |
| or LUMINANCE_ALPHA) when the texture image is of a format type (see |
| table 3.15) other than RGBA (the DSDT_MAG_INTENSITY_NV base internal |
| format does not count as an RGBA format type in this context). |
| |
| INVALID_OPERATION is generated when GetTexImage is called with |
| a format of HILO when the texture image is of a format type (see |
| table 3.15) other than HILO. |
| |
| INVALID_OPERATION is generated when GetTexImage is called with a |
| format of DSDT_NV when the texture image is of a base internal |
| format other than DSDT_NV. |
| |
| INVALID_OPERATION is generated when GetTexImage is called with a |
| format of DSDT_MAG_NV when the texture image is of a base internal |
| format other than DSDT_MAG_NV. |
| |
| INVALID_OPERATION is generated when GetTexImage is called with a |
| format of DSDT_MAG_VIBRANCE_NV when the texture image is of a base |
| internal format other than DSDT_MAG_INTENSITY_NV causes the error |
| INVALID_OPERATION." |
| |
| New State |
| |
| Table 6.TextureShaders. Texture Shaders. |
| |
| Get Value Type Get Command Initial Value Description Sec Attribute |
| --------------------------- ------ ----------- -------------------- ------------------- ------ -------------- |
| SHADER_OPERATION_NV TxZ23 GetTexEnviv NONE Texture shader 3.8.13 texture |
| operation |
| |
| * Z21 in NV_texture_shader is now Z23 with NV_texture_shader2. |
| |
| [ The "Tx" type prefix means that the state is per-texture unit. ] |
| |
| [ The "Zn" type is an n-valued integer where n is the |
| implementation-dependent number of texture units supported.] |
| |
| New Implementation State |
| |
| None |
| |
| Revision History |
| |
| None |
