diff options
| author | Luca Barbieri <luca@luca-barbieri.com> | 2010-04-15 09:02:29 +0200 |
|---|---|---|
| committer | Luca Barbieri <luca@luca-barbieri.com> | 2010-08-20 12:03:59 +0200 |
| commit | 72b3e3fee37413fefe205fa03a111a0180ed19c1 (patch) | |
| tree | 3f19fb6d02ede3ecbe574f2112da28a9912cd53b /src/gallium/docs | |
| parent | 9b3362932df0ec27efd605dfd0838c76111bb23e (diff) | |
gallium: add PIPE_TEXTURE_RECT target
This allows to properly support OpenGL rectangle textures in a well
defined way, especially on drivers that don't expose
PIPE_CAP_NPOT_TEXTURES.
Diffstat (limited to 'src/gallium/docs')
| -rw-r--r-- | src/gallium/docs/source/index.rst | 1 | ||||
| -rw-r--r-- | src/gallium/docs/source/resources.rst | 41 |
2 files changed, 42 insertions, 0 deletions
diff --git a/src/gallium/docs/source/index.rst b/src/gallium/docs/source/index.rst index 6c19842dac..2a73e3ab59 100644 --- a/src/gallium/docs/source/index.rst +++ b/src/gallium/docs/source/index.rst @@ -15,6 +15,7 @@ Contents: debugging tgsi screen + resources context cso distro diff --git a/src/gallium/docs/source/resources.rst b/src/gallium/docs/source/resources.rst new file mode 100644 index 0000000000..a380e5080c --- /dev/null +++ b/src/gallium/docs/source/resources.rst @@ -0,0 +1,41 @@ +Resources +========= + +Resources represent objects that hold data: textures and buffers. + +They are mostly modelled after the resources in Direct3D 10/11, but with a +different transfer/update mechanism, and more features for OpenGL support. + +Resource targets +---------------- + +Resource targets determine the type of a resource. + +Note that drivers may not actually have the restrictions listed regarding +coordinate normalization and wrap modes, and in fact efficient OpenCL +support will probably require drivers that don't have any of them, which +will probably be advertised with an appropriate cap. + +TODO: document all targets. Note that both 3D and cube have restrictions +that depend on the hardware generation. + +TODO: can buffers have a non-R8 format? + +PIPE_TEXTURE_RECT +^^^^^^^^^^^^^^^^^ +2D surface with OpenGL GL_TEXTURE_RECTANGLE semantics. + +depth must be 1 +- last_level must be 0 +- Must use unnormalized coordinates +- Must use a clamp wrap mode + +PIPE_TEXTURE_2D +^^^^^^^^^^^^^^^ +2D surface accessed with normalized coordinates. + +- If PIPE_CAP_NPOT_TEXTURES is not supported, + width and height must be powers of two +- Mipmaps can be used +- Must use normalized coordinates +- No special restrictions on wrap modes |