clear
+ Gallium supports clearing both render targets and depth/stencil with a single call
-draw_range_elements
- + Gallium supports indexed draw with explicit range
-
fence_signalled
fence_finish
+ D3D10/D3D11 don't appear to support explicit fencing; queries can often substitute though, and flushing is supported
DispatchIndirect (D3D11 only)
- Gallium does not support compute shaders
-Draw -> draw_arrays
+Draw -> draw_vbo
! D3D11 sets primitive modes separately with IaSetTopology: it's not obvious which is better
DrawAuto -> draw_auto
-DrawIndexed -> draw_elements
+DrawIndexed -> draw_vbo
! D3D11 sets primitive modes separately with IaSetTopology: it's not obvious which is better
- * may want to add a separate set_index_buffer
- - Gallium lacks base vertex for indexed draw calls
- + D3D11 lacks draw_range_elements functionality, which is required for OpenGL
+ + D3D11 lacks explicit range, which is required for OpenGL
-DrawIndexedInstanced -> draw_elements_instanced
+DrawIndexedInstanced -> draw_vbo
! D3D11 sets primitive modes separately with IaSetTopology: it's not obvious which is better
- * may want to add a separate set_index_buffer
- - Gallium lacks base vertex for indexed draw calls
-DrawIndexedInstancedIndirect (D3D11 only) -> call draw_elements_instanced multiple times in software
- # this allows to use an hardware buffer to specify the parameters for multiple draw_elements_instanced calls
+DrawIndexedInstancedIndirect (D3D11 only)
+ # this allows to use an hardware buffer to specify the parameters for multiple draw_vbo calls
- Gallium does not support draw call parameter buffers and indirect draw
-DrawInstanced -> draw_arrays_instanced
+DrawInstanced -> draw_vbo
! D3D11 sets primitive modes separately with IaSetTopology: it's not obvious which is better
-DrawInstancedIndirect (D3D11 only) -> call draw_arrays_instanced multiple times in software
- # this allows to use an hardware buffer to specify the parameters for multiple draw_arrays_instanced calls
+DrawInstancedIndirect (D3D11 only)
+ # this allows to use an hardware buffer to specify the parameters for multiple draw_vbo calls
- Gallium does not support draw call parameter buffers and indirect draws
DsSetConstantBuffers (D3D11 only)
HsSetShaderWithIfaces (D3D11 only)
- Gallium does not support hull shaders
-IaSetIndexBuffer
- ! Gallium passes this to the draw_elements or draw_elements_instanced calls
+IaSetIndexBuffer -> set_index_buffer
+ Gallium supports 8-bit indices
- ! the D3D11 interface allows index-size-unaligned byte offsets into index buffers; it's not clear whether they actually work
+ # the D3D11 interface allows index-size-unaligned byte offsets into the index buffer; most drivers will abort with an assertion
IaSetInputLayout -> bind_vertex_elements_state
* ``set_vertex_buffers``
+* ``set_index_buffer``
Non-CSO State
^^^^^^^^^^^^^
Drawing
^^^^^^^
-``draw_arrays`` draws a specified primitive.
+``draw_vbo`` draws a specified primitive. The primitive mode and other
+properties are described by ``pipe_draw_info``.
-This command is equivalent to calling ``draw_arrays_instanced``
-with ``startInstance`` set to 0 and ``instanceCount`` set to 1.
+The ``mode``, ``start``, and ``count`` fields of ``pipe_draw_info`` specify the
+the mode of the primitive and the vertices to be fetched, in the range between
+``start`` to ``start``+``count``-1, inclusive.
-``draw_elements`` draws a specified primitive using an optional
-index buffer.
+Every instance with instanceID in the range between ``start_instance`` and
+``start_instance``+``instance_count``-1, inclusive, will be drawn.
-This command is equivalent to calling ``draw_elements_instanced``
-with ``startInstance`` set to 0 and ``instanceCount`` set to 1.
+All vertex indices must fall inside the range given by ``min_index`` and
+``max_index``. In case non-indexed draw, ``min_index`` should be set to
+``start`` and ``max_index`` should be set to ``start``+``count``-1.
-``draw_range_elements``
+``index_bias`` is a value added to every vertex index before fetching vertex
+attributes. It does not affect ``min_index`` and ``max_index``.
-XXX: this is (probably) a temporary entrypoint, as the range
-information should be available from the vertex_buffer state.
-Using this to quickly evaluate a specialized path in the draw
-module.
-
-``draw_arrays_instanced`` draws multiple instances of the same primitive.
-
-This command is equivalent to calling ``draw_elements_instanced``
-with ``indexBuffer`` set to NULL and ``indexSize`` set to 0.
-
-``draw_elements_instanced`` draws multiple instances of the same primitive
-using an optional index buffer.
-
-For instanceID in the range between ``startInstance``
-and ``startInstance``+``instanceCount``-1, inclusive, draw a primitive
-specified by ``mode`` and sequential numbers in the range between ``start``
-and ``start``+``count``-1, inclusive.
-
-If ``indexBuffer`` is not NULL, it specifies an index buffer with index
-byte size of ``indexSize``. The sequential numbers are used to lookup
-the index buffer and the resulting indices in turn are used to fetch
-vertex attributes.
-
-If ``indexBuffer`` is NULL, the sequential numbers are used directly
-as indices to fetch vertex attributes.
-
-``indexBias`` is a value which is added to every index read from the index
-buffer before fetching vertex attributes.
-
-``minIndex`` and ``maxIndex`` describe minimum and maximum index contained in
-the index buffer.
+If there is an index buffer bound, and ``indexed`` field is true, all vertex
+indices will be looked up in the index buffer. ``min_index``, ``max_index``,
+and ``index_bias`` apply after index lookup.
If a given vertex element has ``instance_divisor`` set to 0, it is said
it contains per-vertex data and effective vertex attribute address needs
projects / mesa.git / commitdiff