diff options
| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 52 |
1 files changed, 31 insertions, 21 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 17fe76ea542..5b0da6b4d74 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -1449,24 +1449,34 @@ Texture Sampling and Texture Formats This table shows how texture image components are returned as (x,y,z,w) tuples by TGSI texture instructions, such as TEX, TXD, and TXP. -For reference, OpenGL and Direct3D convensions are shown as well:: - - Texture Components Gallium OpenGL DX9 - --------------------------------------------------------- - R,G,B,A (R,G,B,A) (R,G,B,A) (R,G,B,A) - R,G,B (R,G,B,1) (R,G,B,1) (R,G,B,1) - R,G tbd (R,G,0,1) (R,G,1,1) - R tbd (R,0,0,1) (R,1,1,1) - A (0,0,0,A) (0,0,0,A) (0,0,0,A) - L (L,L,L,1) (L,L,L,1) (L,L,L,1) - LA (L,L,L,A) (L,L,L,A) (L,L,L,A) - I (I,I,I,I) (I,I,I,I) n/a - UV tbd (0,0,0,1)* (U,V,1,1) - Z tbd (Z,Z,Z,Z) or (0,Z,0,1) - (Z,Z,Z,1) or - (0,0,0,Z)** - - Footnotes: - * per http://www.opengl.org/registry/specs/ATI/envmap_bumpmap.txt - ** depends on GL_DEPTH_TEXTURE_MODE state -
\ No newline at end of file +For reference, OpenGL and Direct3D convensions are shown as well. + ++--------------------+--------------+--------------------+--------------+ +| Texture Components | Gallium | OpenGL | Direct3D 9 | ++====================+==============+====================+==============+ +| R | XXX TBD | (r, 0, 0, 1) | (r, 1, 1, 1) | ++--------------------+--------------+--------------------+--------------+ +| RG | XXX TBD | (r, g, 0, 1) | (r, g, 1, 1) | ++--------------------+--------------+--------------------+--------------+ +| RGB | (r, g, b, 1) | (r, g, b, 1) | (r, g, b, 1) | ++--------------------+--------------+--------------------+--------------+ +| RGBA | (r, g, b, a) | (r, g, b, a) | (r, g, b, a) | ++--------------------+--------------+--------------------+--------------+ +| A | (0, 0, 0, a) | (0, 0, 0, a) | (0, 0, 0, a) | ++--------------------+--------------+--------------------+--------------+ +| L | (l, l, l, 1) | (l, l, l, 1) | (l, l, l, 1) | ++--------------------+--------------+--------------------+--------------+ +| LA | (l, l, l, a) | (l, l, l, a) | (l, l, l, a) | ++--------------------+--------------+--------------------+--------------+ +| I | (i, i, i, i) | (i, i, i, i) | N/A | ++--------------------+--------------+--------------------+--------------+ +| UV | XXX TBD | (0, 0, 0, 1) | (u, v, 1, 1) | +| | | [#envmap-bumpmap]_ | | ++--------------------+--------------+--------------------+--------------+ +| Z | XXX TBD | (z, z, z, z) | (0, z, 0, 1) | +| | | [#depth-tex-mode]_ | | ++--------------------+--------------+--------------------+--------------+ + +.. [#envmap-bumpmap] http://www.opengl.org/registry/specs/ATI/envmap_bumpmap.txt +.. [#depth-tex-mode] Z may be (z, z, z, 1) or (0, 0, 0, z) also; it changes + depending on GL_DEPTH_TEXTURE_MODE state. |