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Diffstat (limited to 'src/gallium/docs/source/context.rst')
| -rw-r--r-- | src/gallium/docs/source/context.rst | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst index 9080addba4..2b0941010b 100644 --- a/src/gallium/docs/source/context.rst +++ b/src/gallium/docs/source/context.rst @@ -24,6 +24,7 @@ CSO objects handled by the context object: * :ref:`Depth, Stencil, & Alpha`: ``*_depth_stencil_alpha_state`` * :ref:`Shader`: These have two sets of methods. ``*_fs_state`` is for fragment shaders, and ``*_vs_state`` is for vertex shaders. +* :ref:`Vertex Elements`: ``*_vertex_elements_state`` Resource Binding State @@ -39,8 +40,7 @@ buffers, surfaces) are bound to the driver. are mostly restricted to the first one right now). * ``set_framebuffer_state`` -* ``set_fragment_sampler_textures`` -* ``set_vertex_sampler_textures`` + * ``set_vertex_buffers`` @@ -50,6 +50,7 @@ Non-CSO State These pieces of state are too small, variable, and/or trivial to have CSO objects. They all follow simple, one-method binding calls, e.g. ``set_blend_color``. + * ``set_stencil_ref`` sets the stencil front and back reference values which are used as comparison values in stencil test. * ``set_blend_color`` @@ -60,7 +61,41 @@ objects. They all follow simple, one-method binding calls, e.g. not have the scissor test enabled, then the scissor bounds never need to be set since they will not be used. * ``set_viewport_state`` -* ``set_vertex_elements`` + + +Sampler Views +^^^^^^^^^^^^^ + +These are the means to bind textures to shader stages. To create one, specify +its format, swizzle and LOD range in sampler view template. + +If texture format is different than template format, it is said the texture +is being cast to another format. Casting can be done only between compatible +formats, that is formats that have matching component order and sizes. + +Swizzle fields specify they way in which fetched texel components are placed +in the result register. For example, ``swizzle_r`` specifies what is going to be +placed in first component of result register. + +The ``first_level`` and ``last_level`` fields of sampler view template specify +the LOD range the texture is going to be constrained to. + +* ``set_fragment_sampler_views`` binds an array of sampler views to + fragment shader stage. Every binding point acquires a reference + to a respective sampler view and releases a reference to the previous + sampler view. + +* ``set_vertex_sampler_views`` binds an array of sampler views to vertex + shader stage. Every binding point acquires a reference to a respective + sampler view and releases a reference to the previous sampler view. + +* ``create_sampler_view`` creates a new sampler view. ``texture`` is associated + with the sampler view which results in sampler view holding a reference + to the texture. Format specified in template must be compatible + with texture format. + +* ``sampler_view_destroy`` destroys a sampler view and releases its reference + to associated texture. Clearing |