@@ -1,6 +1,13 @@ | |||
CSO | |||
=== | |||
CSO, Constant State Objects, are a core part of Gallium's API. | |||
CSO work on the principle of reusable state; they are created by filling | |||
out a state object with the desired properties, then passing that object | |||
to a context. The context returns an opaque context-specific handle which | |||
can be bound at any time for the desired effect. | |||
.. toctree:: | |||
:glob: | |||
@@ -9,4 +9,4 @@ XXX it is unresolved what behavior should result if blend_enable is off. | |||
Members | |||
------- | |||
XXX | |||
XXX undocumented members |
@@ -7,17 +7,50 @@ 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 | |||
------------- | |||
XXX | |||
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 | |||
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 | |||
------------- | |||
XXX | |||
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. |
@@ -7,4 +7,78 @@ interpolated into fragments. | |||
Members | |||
------- | |||
XXX | |||
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 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. | |||
* 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. |
@@ -4,7 +4,41 @@ 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 | |||
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. |
@@ -47,6 +47,11 @@ | |||
<div class="section" id="cso"> | |||
<h1>CSO<a class="headerlink" href="#cso" title="Permalink to this headline">¶</a></h1> | |||
<p>CSO, Constant State Objects, are a core part of Gallium’s API.</p> | |||
<p>CSO work on the principle of reusable state; they are created by filling | |||
out a state object with the desired properties, then passing that object | |||
to a context. The context returns an opaque context-specific handle which | |||
can be bound at any time for the desired effect.</p> | |||
<ul> | |||
<li class="toctree-l1"><a class="reference external" href="cso/blend.html">Blend</a><ul> | |||
<li class="toctree-l2"><a class="reference external" href="cso/blend.html#members">Members</a></li> | |||
@@ -60,6 +65,12 @@ | |||
</li> | |||
<li class="toctree-l1"><a class="reference external" href="cso/rasterizer.html">Rasterizer</a><ul> | |||
<li class="toctree-l2"><a class="reference external" href="cso/rasterizer.html#members">Members</a></li> | |||
<li class="toctree-l2"><a class="reference external" href="cso/rasterizer.html#notes">Notes</a><ul> | |||
<li class="toctree-l3"><a class="reference external" href="cso/rasterizer.html#flatshade">flatshade</a></li> | |||
<li class="toctree-l3"><a class="reference external" href="cso/rasterizer.html#bypass-vs-clip-and-viewport">bypass_vs_clip_and_viewport</a></li> | |||
<li class="toctree-l3"><a class="reference external" href="cso/rasterizer.html#flatshade-first">flatshade_first</a></li> | |||
</ul> | |||
</li> | |||
</ul> | |||
</li> | |||
<li class="toctree-l1"><a class="reference external" href="cso/sampler.html">Sampler</a><ul> |
@@ -54,7 +54,7 @@ buffers.</p> | |||
<p>XXX it is unresolved what behavior should result if blend_enable is off.</p> | |||
<div class="section" id="members"> | |||
<h2>Members<a class="headerlink" href="#members" title="Permalink to this headline">¶</a></h2> | |||
<p>XXX</p> | |||
<p>XXX undocumented members</p> | |||
</div> | |||
</div> | |||
@@ -53,17 +53,55 @@ | |||
discard fragments that have passed through the fragment shader.</p> | |||
<p>Traditionally, these three tests have been clumped together in hardware, so | |||
they are all stored in one structure.</p> | |||
<p>During actual execution, the order of operations done on fragments is always:</p> | |||
<ul class="simple"> | |||
<li>Stencil</li> | |||
<li>Depth</li> | |||
<li>Alpha</li> | |||
</ul> | |||
<div class="section" id="depth-members"> | |||
<h2>Depth Members<a class="headerlink" href="#depth-members" title="Permalink to this headline">¶</a></h2> | |||
<p>XXX</p> | |||
<dl class="docutils"> | |||
<dt>enabled</dt> | |||
<dd>Whether the depth test is enabled.</dd> | |||
<dt>writemask</dt> | |||
<dd>Whether the depth buffer receives depth writes.</dd> | |||
<dt>func</dt> | |||
<dd>The depth test function. One of PIPE_FUNC.</dd> | |||
</dl> | |||
</div> | |||
<div class="section" id="stencil-members"> | |||
<h2>Stencil Members<a class="headerlink" href="#stencil-members" title="Permalink to this headline">¶</a></h2> | |||
<p>XXX</p> | |||
<p>XXX document valuemask, writemask</p> | |||
<dl class="docutils"> | |||
<dt>enabled</dt> | |||
<dd>Whether the stencil test is enabled. For the second stencil, whether the | |||
two-sided stencil is enabled.</dd> | |||
<dt>func</dt> | |||
<dd>The stencil test function. One of PIPE_FUNC.</dd> | |||
<dt>ref_value</dt> | |||
<dd>Stencil test reference value; used for certain functions.</dd> | |||
<dt>fail_op</dt> | |||
<dd>The operation to carry out if the stencil test fails. One of | |||
PIPE_STENCIL_OP.</dd> | |||
<dt>zfail_op</dt> | |||
<dd>The operation to carry out if the stencil test passes but the depth test | |||
fails. One of PIPE_STENCIL_OP.</dd> | |||
<dt>zpass_op</dt> | |||
<dd>The operation to carry out if the stencil test and depth test both pass. | |||
One of PIPE_STENCIL_OP.</dd> | |||
</dl> | |||
</div> | |||
<div class="section" id="alpha-members"> | |||
<h2>Alpha Members<a class="headerlink" href="#alpha-members" title="Permalink to this headline">¶</a></h2> | |||
<p>XXX</p> | |||
<dl class="docutils"> | |||
<dt>enabled</dt> | |||
<dd>Whether the alpha test is enabled.</dd> | |||
<dt>func</dt> | |||
<dd>The alpha test function. One of PIPE_FUNC.</dd> | |||
<dt>ref_value</dt> | |||
<dd>Alpha test reference value; used for certain functions.</dd> | |||
</dl> | |||
</div> | |||
</div> | |||
@@ -53,7 +53,80 @@ | |||
interpolated into fragments.</p> | |||
<div class="section" id="members"> | |||
<h2>Members<a class="headerlink" href="#members" title="Permalink to this headline">¶</a></h2> | |||
<p>XXX</p> | |||
<p>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</p> | |||
<dl class="docutils"> | |||
<dt>flatshade</dt> | |||
<dd>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.</dd> | |||
<dt>scissor</dt> | |||
<dd>Whether the scissor test is enabled.</dd> | |||
<dt>poly_stipple_enable</dt> | |||
<dd>Whether polygon stippling is enabled.</dd> | |||
<dt>point_smooth</dt> | |||
<dd>Whether points should be smoothed. Point smoothing turns rectangular | |||
points into circles or ovals.</dd> | |||
<dt>point_sprite</dt> | |||
<dd>Whether point sprites are enabled.</dd> | |||
<dt>point_size_per_vertex</dt> | |||
<dd>Whether vertices have a point size element.</dd> | |||
<dt>multisample</dt> | |||
<dd>Whether MSAA is enabled.</dd> | |||
<dt>line_smooth</dt> | |||
<dd>Whether lines should be smoothed. Line smoothing is simply anti-aliasing.</dd> | |||
<dt>line_stipple_enable</dt> | |||
<dd>Whether line stippling is enabled.</dd> | |||
<dt>line_stipple_pattern</dt> | |||
<dd>16-bit bitfield of on/off flags, used to pattern the line stipple.</dd> | |||
<dt>bypass_vs_clip_and_viewport</dt> | |||
<dd>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.</dd> | |||
<dt>flatshade_first</dt> | |||
<dd>Whether the first vertex should be the provoking vertex, for most | |||
primitives. If not set, the last vertex is the provoking vertex.</dd> | |||
<dt>gl_rasterization_rules</dt> | |||
<dd>Whether the rasterizer should use (0.5, 0.5) pixel centers. When not set, | |||
the rasterizer will use (0, 0) for pixel centers.</dd> | |||
<dt>line_width</dt> | |||
<dd>The width of lines.</dd> | |||
<dt>point_size</dt> | |||
<dd>The size of points, if not specified per-vertex.</dd> | |||
<dt>point_size_min</dt> | |||
<dd>The minimum size of points.</dd> | |||
<dt>point_size_max</dt> | |||
<dd>The maximum size of points.</dd> | |||
</dl> | |||
</div> | |||
<div class="section" id="notes"> | |||
<h2>Notes<a class="headerlink" href="#notes" title="Permalink to this headline">¶</a></h2> | |||
<div class="section" id="flatshade"> | |||
<h3>flatshade<a class="headerlink" href="#flatshade" title="Permalink to this headline">¶</a></h3> | |||
<p>The actual interpolated shading algorithm is obviously | |||
implementation-dependent, but will usually be Gourard for most hardware.</p> | |||
</div> | |||
<div class="section" id="bypass-vs-clip-and-viewport"> | |||
<h3>bypass_vs_clip_and_viewport<a class="headerlink" href="#bypass-vs-clip-and-viewport" title="Permalink to this headline">¶</a></h3> | |||
<p>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.</p> | |||
</div> | |||
<div class="section" id="flatshade-first"> | |||
<h3>flatshade_first<a class="headerlink" href="#flatshade-first" title="Permalink to this headline">¶</a></h3> | |||
<p>There are several important exceptions to the specification of this rule.</p> | |||
<ul class="simple"> | |||
<li>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.</li> | |||
<li>PIPE_PRIMITIVE_QUAD, PIPE_PRIMITIVE_QUAD_STRIP: This option has no effect.</li> | |||
<li>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.</li> | |||
</ul> | |||
</div> | |||
</div> | |||
</div> | |||
@@ -67,6 +140,12 @@ interpolated into fragments.</p> | |||
<ul> | |||
<li><a class="reference external" href="">Rasterizer</a><ul> | |||
<li><a class="reference external" href="#members">Members</a></li> | |||
<li><a class="reference external" href="#notes">Notes</a><ul> | |||
<li><a class="reference external" href="#flatshade">flatshade</a></li> | |||
<li><a class="reference external" href="#bypass-vs-clip-and-viewport">bypass_vs_clip_and_viewport</a></li> | |||
<li><a class="reference external" href="#flatshade-first">flatshade_first</a></li> | |||
</ul> | |||
</li> | |||
</ul> | |||
</li> | |||
</ul> |
@@ -51,9 +51,43 @@ | |||
<h1>Sampler<a class="headerlink" href="#sampler" title="Permalink to this headline">¶</a></h1> | |||
<p>Texture units have many options for selecting texels from loaded textures; | |||
this state controls an individual texture unit’s texel-sampling settings.</p> | |||
<p>Texture coordinates are always treated as four-dimensional, and referred to | |||
with the traditional (S, T, R, Q) notation.</p> | |||
<div class="section" id="members"> | |||
<h2>Members<a class="headerlink" href="#members" title="Permalink to this headline">¶</a></h2> | |||
<p>XXX</p> | |||
<p>XXX undocumented compare_mode, compare_func</p> | |||
<dl class="docutils"> | |||
<dt>wrap_s</dt> | |||
<dd>How to wrap the S coordinate. One of PIPE_TEX_WRAP.</dd> | |||
<dt>wrap_t</dt> | |||
<dd>How to wrap the T coordinate. One of PIPE_TEX_WRAP.</dd> | |||
<dt>wrap_r</dt> | |||
<dd>How to wrap the R coordinate. One of PIPE_TEX_WRAP.</dd> | |||
<dt>min_img_filter</dt> | |||
<dd>The filter to use when minifying texels. One of PIPE_TEX_FILTER.</dd> | |||
<dt>min_mip_filter</dt> | |||
<dd>The filter to use when minifying mipmapped textures. One of | |||
PIPE_TEX_FILTER.</dd> | |||
<dt>mag_img_filter</dt> | |||
<dd>The filter to use when magnifying texels. One of PIPE_TEX_FILTER.</dd> | |||
<dt>normalized_coords</dt> | |||
<dd>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.</dd> | |||
<dt>prefilter</dt> | |||
<dd>XXX From the Doxy, “weird sampling state exposed by some APIs.” Refine.</dd> | |||
<dt>lod_bias</dt> | |||
<dd>The bias to apply to the level of detail.</dd> | |||
<dt>min_lod</dt> | |||
<dd>Minimum level of detail, used to clamp LoD after bias.</dd> | |||
<dt>max_lod</dt> | |||
<dd>Maximum level of detail, used to clamp LoD after bias.</dd> | |||
<dt>border_color</dt> | |||
<dd>RGBA color used for out-of-bounds coordinates.</dd> | |||
<dt>max_anisotropy</dt> | |||
<dd>Maximum filtering to apply anisotropically to textures. Setting this to | |||
1.0 effectively disables anisotropic filtering.</dd> | |||
</dl> | |||
</div> | |||
</div> | |||
@@ -1 +1 @@ | |||
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@@ -20,7 +20,7 @@ | |||
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