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Diffstat (limited to 'src/gallium/docs/source/cso')
| -rw-r--r-- | src/gallium/docs/source/cso/blend.rst | 14 | ||||
| -rw-r--r-- | src/gallium/docs/source/cso/dsa.rst | 58 | ||||
| -rw-r--r-- | src/gallium/docs/source/cso/rasterizer.rst | 87 | ||||
| -rw-r--r-- | src/gallium/docs/source/cso/sampler.rst | 46 | ||||
| -rw-r--r-- | src/gallium/docs/source/cso/shader.rst | 12 |
5 files changed, 217 insertions, 0 deletions
diff --git a/src/gallium/docs/source/cso/blend.rst b/src/gallium/docs/source/cso/blend.rst new file mode 100644 index 0000000000..fd9e4a1e2d --- /dev/null +++ b/src/gallium/docs/source/cso/blend.rst @@ -0,0 +1,14 @@ +.. _blend: + +Blend +===== + +This state controls blending of the final fragments into the target rendering +buffers. + +XXX it is unresolved what behavior should result if blend_enable is off. + +Members +------- + +XXX undocumented members diff --git a/src/gallium/docs/source/cso/dsa.rst b/src/gallium/docs/source/cso/dsa.rst new file mode 100644 index 0000000000..12abaa9d6f --- /dev/null +++ b/src/gallium/docs/source/cso/dsa.rst @@ -0,0 +1,58 @@ +.. _depth,stencil,&alpha: + +Depth, Stencil, & Alpha +======================= + +These three states control the depth, stencil, and alpha tests, used to +discard fragments that have passed through the fragment shader. + +Traditionally, these three tests have been clumped together in hardware, so +they are all stored in one structure. + +During actual execution, the order of operations done on fragments is always: + +* Stencil +* Depth +* Alpha + +Depth Members +------------- + +enabled + Whether the depth test is enabled. +writemask + Whether the depth buffer receives depth writes. +func + The depth test function. One of PIPE_FUNC. + +Stencil Members +--------------- + +XXX document valuemask, writemask + +enabled + Whether the stencil test is enabled. For the second stencil, whether the + two-sided stencil is enabled. +func + The stencil test function. One of PIPE_FUNC. +ref_value + Stencil test reference value; used for certain functions. +fail_op + The operation to carry out if the stencil test fails. One of + PIPE_STENCIL_OP. +zfail_op + The operation to carry out if the stencil test passes but the depth test + fails. One of PIPE_STENCIL_OP. +zpass_op + The operation to carry out if the stencil test and depth test both pass. + One of PIPE_STENCIL_OP. + +Alpha Members +------------- + +enabled + Whether the alpha test is enabled. +func + The alpha test function. One of PIPE_FUNC. +ref_value + Alpha test reference value; used for certain functions. diff --git a/src/gallium/docs/source/cso/rasterizer.rst b/src/gallium/docs/source/cso/rasterizer.rst new file mode 100644 index 0000000000..afb58ea375 --- /dev/null +++ b/src/gallium/docs/source/cso/rasterizer.rst @@ -0,0 +1,87 @@ +.. _rasterizer: + +Rasterizer +========== + +The rasterizer is the main chunk of state controlling how vertices are +interpolated into fragments. + +Members +------- + +XXX undocumented light_twoside, front_winding, cull_mode, fill_cw, fill_ccw, offset_cw, offset_ccw +XXX moar undocumented poly_smooth, line_stipple_factor, line_last_pixel, offset_units, offset_scale +XXX sprite_coord_mode + +flatshade + If set, the provoking vertex of each polygon is used to determine the + color of the entire polygon. If not set, the color fragments will be + interpolated from each vertex's color. +scissor + Whether the scissor test is enabled. +poly_stipple_enable + Whether polygon stippling is enabled. +point_smooth + Whether points should be smoothed. Point smoothing turns rectangular + points into circles or ovals. +point_sprite + Whether point sprites are enabled. +point_size_per_vertex + Whether vertices have a point size element. +multisample + Whether :ref:`MSAA` is enabled. +line_smooth + Whether lines should be smoothed. Line smoothing is simply anti-aliasing. +line_stipple_enable + Whether line stippling is enabled. +line_stipple_pattern + 16-bit bitfield of on/off flags, used to pattern the line stipple. +bypass_vs_clip_and_viewport + Whether the entire TCL pipeline should be bypassed. This implies that + vertices are pre-transformed for the viewport, and will not be run + through the vertex shader. Note that implementations may still clip away + vertices that are not in the viewport. +flatshade_first + Whether the first vertex should be the provoking vertex, for most + primitives. If not set, the last vertex is the provoking vertex. +gl_rasterization_rules + Whether the rasterizer should use (0.5, 0.5) pixel centers. When not set, + the rasterizer will use (0, 0) for pixel centers. +line_width + The width of lines. +point_size + The size of points, if not specified per-vertex. +point_size_min + The minimum size of points. +point_size_max + The maximum size of points. + +Notes +----- + +flatshade +^^^^^^^^^ + +The actual interpolated shading algorithm is obviously +implementation-dependent, but will usually be Gourard for most hardware. + +bypass_vs_clip_and_viewport +^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +When set, this implies that vertices are pre-transformed for the viewport, and +will not be run through the vertex shader. Note that implementations may still +clip away vertices that are not visible. + +flatshade_first +^^^^^^^^^^^^^^^ + +There are several important exceptions to the specification of this rule. + +* ``PIPE_PRIMITIVE_POLYGON``: The provoking vertex is always the first + vertex. If the caller wishes to change the provoking vertex, they merely + need to rotate the vertices themselves. +* ``PIPE_PRIMITIVE_QUAD``, ``PIPE_PRIMITIVE_QUAD_STRIP``: This option has no + effect; the provoking vertex is always the last vertex. +* ``PIPE_PRIMITIVE_TRIANGLE_FAN``: When set, the provoking vertex is the + second vertex, not the first. This permits each segment of the fan to have + a different color. diff --git a/src/gallium/docs/source/cso/sampler.rst b/src/gallium/docs/source/cso/sampler.rst new file mode 100644 index 0000000000..e3f1757f57 --- /dev/null +++ b/src/gallium/docs/source/cso/sampler.rst @@ -0,0 +1,46 @@ +.. _sampler: + +Sampler +======= + +Texture units have many options for selecting texels from loaded textures; +this state controls an individual texture unit's texel-sampling settings. + +Texture coordinates are always treated as four-dimensional, and referred to +with the traditional (S, T, R, Q) notation. + +Members +------- + +XXX undocumented compare_mode, compare_func + +wrap_s + How to wrap the S coordinate. One of PIPE_TEX_WRAP. +wrap_t + How to wrap the T coordinate. One of PIPE_TEX_WRAP. +wrap_r + How to wrap the R coordinate. One of PIPE_TEX_WRAP. +min_img_filter + The filter to use when minifying texels. One of PIPE_TEX_FILTER. +min_mip_filter + The filter to use when minifying mipmapped textures. One of + PIPE_TEX_FILTER. +mag_img_filter + The filter to use when magnifying texels. One of PIPE_TEX_FILTER. +normalized_coords + Whether the texture coordinates are normalized. If normalized, they will + always be in [0, 1]. If not, they will be in the range of each dimension + of the loaded texture. +prefilter + XXX From the Doxy, "weird sampling state exposed by some APIs." Refine. +lod_bias + The bias to apply to the level of detail. +min_lod + Minimum level of detail, used to clamp LoD after bias. +max_lod + Maximum level of detail, used to clamp LoD after bias. +border_color + RGBA color used for out-of-bounds coordinates. +max_anisotropy + Maximum filtering to apply anisotropically to textures. Setting this to + 1.0 effectively disables anisotropic filtering. diff --git a/src/gallium/docs/source/cso/shader.rst b/src/gallium/docs/source/cso/shader.rst new file mode 100644 index 0000000000..0ee42c8787 --- /dev/null +++ b/src/gallium/docs/source/cso/shader.rst @@ -0,0 +1,12 @@ +.. _shader: + +Shader +====== + +One of the two types of shaders supported by Gallium. + +Members +------- + +tokens + A list of tgsi_tokens. |