1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
32 * Abstract graphics pipe state objects.
35 * 1. Want compact representations, so we use bitfields.
36 * 2. Put bitfields before other (GLfloat) fields.
43 #include "p_compiler.h"
44 #include "p_defines.h"
54 * Implementation limits
56 #define PIPE_MAX_ATTRIBS 32
57 #define PIPE_MAX_CLIP_PLANES 8
58 #define PIPE_MAX_COLOR_BUFS 8
59 #define PIPE_MAX_CONSTANT_BUFFERS 32
60 #define PIPE_MAX_SAMPLERS 18 /* 16 public + 2 driver internal */
61 #define PIPE_MAX_SHADER_INPUTS 80 /* 32 GENERIC + 32 PATCH + 16 others */
62 #define PIPE_MAX_SHADER_OUTPUTS 80 /* 32 GENERIC + 32 PATCH + 16 others */
63 #define PIPE_MAX_SHADER_SAMPLER_VIEWS 32
64 #define PIPE_MAX_SHADER_BUFFERS 32
65 #define PIPE_MAX_SHADER_IMAGES 32
66 #define PIPE_MAX_TEXTURE_LEVELS 16
67 #define PIPE_MAX_SO_BUFFERS 4
68 #define PIPE_MAX_SO_OUTPUTS 64
69 #define PIPE_MAX_VIEWPORTS 16
70 #define PIPE_MAX_CLIP_OR_CULL_DISTANCE_COUNT 8
71 #define PIPE_MAX_CLIP_OR_CULL_DISTANCE_ELEMENT_COUNT 2
76 int32_t count
; /* atomic */
82 * Primitive (point/line/tri) rasterization info
84 struct pipe_rasterizer_state
87 unsigned light_twoside
:1;
88 unsigned clamp_vertex_color
:1;
89 unsigned clamp_fragment_color
:1;
91 unsigned cull_face
:2; /**< PIPE_FACE_x */
92 unsigned fill_front
:2; /**< PIPE_POLYGON_MODE_x */
93 unsigned fill_back
:2; /**< PIPE_POLYGON_MODE_x */
94 unsigned offset_point
:1;
95 unsigned offset_line
:1;
96 unsigned offset_tri
:1;
98 unsigned poly_smooth
:1;
99 unsigned poly_stipple_enable
:1;
100 unsigned point_smooth
:1;
101 unsigned sprite_coord_mode
:1; /**< PIPE_SPRITE_COORD_ */
102 unsigned point_quad_rasterization
:1; /** points rasterized as quads or points */
103 unsigned point_tri_clip
:1; /** large points clipped as tris or points */
104 unsigned point_size_per_vertex
:1; /**< size computed in vertex shader */
105 unsigned multisample
:1; /* XXX maybe more ms state in future */
106 unsigned line_smooth
:1;
107 unsigned line_stipple_enable
:1;
108 unsigned line_last_pixel
:1;
111 * Use the first vertex of a primitive as the provoking vertex for
114 unsigned flatshade_first
:1;
116 unsigned half_pixel_center
:1;
117 unsigned bottom_edge_rule
:1;
120 * When true, rasterization is disabled and no pixels are written.
121 * This only makes sense with the Stream Out functionality.
123 unsigned rasterizer_discard
:1;
126 * When false, depth clipping is disabled and the depth value will be
127 * clamped later at the per-pixel level before depth testing.
128 * This depends on PIPE_CAP_DEPTH_CLIP_DISABLE.
130 unsigned depth_clip
:1;
133 * When true clip space in the z axis goes from [0..1] (D3D). When false
136 * NOTE: D3D will always use depth clamping.
138 unsigned clip_halfz
:1;
141 * Enable bits for clipping half-spaces.
142 * This applies to both user clip planes and shader clip distances.
143 * Note that if the bound shader exports any clip distances, these
144 * replace all user clip planes, and clip half-spaces enabled here
145 * but not written by the shader count as disabled.
147 unsigned clip_plane_enable
:PIPE_MAX_CLIP_PLANES
;
149 unsigned line_stipple_factor
:8; /**< [1..256] actually */
150 unsigned line_stipple_pattern
:16;
152 uint32_t sprite_coord_enable
; /* referring to 32 TEXCOORD/GENERIC inputs */
155 float point_size
; /**< used when no per-vertex size */
162 struct pipe_poly_stipple
164 unsigned stipple
[32];
168 struct pipe_viewport_state
175 struct pipe_scissor_state
184 struct pipe_clip_state
186 float ucp
[PIPE_MAX_CLIP_PLANES
][4];
191 * Stream output for vertex transform feedback.
193 struct pipe_stream_output_info
195 unsigned num_outputs
;
196 /** stride for an entire vertex for each buffer in dwords */
197 unsigned stride
[PIPE_MAX_SO_BUFFERS
];
200 * Array of stream outputs, in the order they are to be written in.
201 * Selected components are tightly packed into the output buffer.
204 unsigned register_index
:8; /**< 0 to PIPE_MAX_SHADER_OUTPUTS */
205 unsigned start_component
:2; /** 0 to 3 */
206 unsigned num_components
:3; /** 1 to 4 */
207 unsigned output_buffer
:3; /**< 0 to PIPE_MAX_SO_BUFFERS */
208 unsigned dst_offset
:16; /**< offset into the buffer in dwords */
209 unsigned stream
:2; /**< 0 to 3 */
210 } output
[PIPE_MAX_SO_OUTPUTS
];
214 struct pipe_shader_state
216 const struct tgsi_token
*tokens
;
217 struct pipe_stream_output_info stream_output
;
221 struct pipe_depth_state
223 unsigned enabled
:1; /**< depth test enabled? */
224 unsigned writemask
:1; /**< allow depth buffer writes? */
225 unsigned func
:3; /**< depth test func (PIPE_FUNC_x) */
226 unsigned bounds_test
:1; /**< depth bounds test enabled? */
227 float bounds_min
; /**< minimum depth bound */
228 float bounds_max
; /**< maximum depth bound */
232 struct pipe_stencil_state
234 unsigned enabled
:1; /**< stencil[0]: stencil enabled, stencil[1]: two-side enabled */
235 unsigned func
:3; /**< PIPE_FUNC_x */
236 unsigned fail_op
:3; /**< PIPE_STENCIL_OP_x */
237 unsigned zpass_op
:3; /**< PIPE_STENCIL_OP_x */
238 unsigned zfail_op
:3; /**< PIPE_STENCIL_OP_x */
239 unsigned valuemask
:8;
240 unsigned writemask
:8;
244 struct pipe_alpha_state
247 unsigned func
:3; /**< PIPE_FUNC_x */
248 float ref_value
; /**< reference value */
252 struct pipe_depth_stencil_alpha_state
254 struct pipe_depth_state depth
;
255 struct pipe_stencil_state stencil
[2]; /**< [0] = front, [1] = back */
256 struct pipe_alpha_state alpha
;
260 struct pipe_rt_blend_state
262 unsigned blend_enable
:1;
264 unsigned rgb_func
:3; /**< PIPE_BLEND_x */
265 unsigned rgb_src_factor
:5; /**< PIPE_BLENDFACTOR_x */
266 unsigned rgb_dst_factor
:5; /**< PIPE_BLENDFACTOR_x */
268 unsigned alpha_func
:3; /**< PIPE_BLEND_x */
269 unsigned alpha_src_factor
:5; /**< PIPE_BLENDFACTOR_x */
270 unsigned alpha_dst_factor
:5; /**< PIPE_BLENDFACTOR_x */
272 unsigned colormask
:4; /**< bitmask of PIPE_MASK_R/G/B/A */
276 struct pipe_blend_state
278 unsigned independent_blend_enable
:1;
279 unsigned logicop_enable
:1;
280 unsigned logicop_func
:4; /**< PIPE_LOGICOP_x */
282 unsigned alpha_to_coverage
:1;
283 unsigned alpha_to_one
:1;
284 struct pipe_rt_blend_state rt
[PIPE_MAX_COLOR_BUFS
];
288 struct pipe_blend_color
294 struct pipe_stencil_ref
300 struct pipe_framebuffer_state
302 unsigned width
, height
;
304 /** multiple color buffers for multiple render targets */
306 struct pipe_surface
*cbufs
[PIPE_MAX_COLOR_BUFS
];
308 struct pipe_surface
*zsbuf
; /**< Z/stencil buffer */
313 * Texture sampler state.
315 struct pipe_sampler_state
317 unsigned wrap_s
:3; /**< PIPE_TEX_WRAP_x */
318 unsigned wrap_t
:3; /**< PIPE_TEX_WRAP_x */
319 unsigned wrap_r
:3; /**< PIPE_TEX_WRAP_x */
320 unsigned min_img_filter
:2; /**< PIPE_TEX_FILTER_x */
321 unsigned min_mip_filter
:2; /**< PIPE_TEX_MIPFILTER_x */
322 unsigned mag_img_filter
:2; /**< PIPE_TEX_FILTER_x */
323 unsigned compare_mode
:1; /**< PIPE_TEX_COMPARE_x */
324 unsigned compare_func
:3; /**< PIPE_FUNC_x */
325 unsigned normalized_coords
:1; /**< Are coords normalized to [0,1]? */
326 unsigned max_anisotropy
:6;
327 unsigned seamless_cube_map
:1;
328 float lod_bias
; /**< LOD/lambda bias */
329 float min_lod
, max_lod
; /**< LOD clamp range, after bias */
330 union pipe_color_union border_color
;
335 * A view into a texture that can be bound to a color render target /
336 * depth stencil attachment point.
340 struct pipe_reference reference
;
341 struct pipe_resource
*texture
; /**< resource into which this is a view */
342 struct pipe_context
*context
; /**< context this surface belongs to */
343 enum pipe_format format
;
345 /* XXX width/height should be removed */
346 unsigned width
; /**< logical width in pixels */
347 unsigned height
; /**< logical height in pixels */
349 unsigned writable
:1; /**< writable shader resource */
354 unsigned first_layer
:16;
355 unsigned last_layer
:16;
358 unsigned first_element
;
359 unsigned last_element
;
366 * A view into a texture that can be bound to a shader stage.
368 struct pipe_sampler_view
370 struct pipe_reference reference
;
371 enum pipe_texture_target target
; /**< PIPE_TEXTURE_x */
372 enum pipe_format format
; /**< typed PIPE_FORMAT_x */
373 struct pipe_resource
*texture
; /**< texture into which this is a view */
374 struct pipe_context
*context
; /**< context this view belongs to */
377 unsigned first_layer
:16; /**< first layer to use for array textures */
378 unsigned last_layer
:16; /**< last layer to use for array textures */
379 unsigned first_level
:8; /**< first mipmap level to use */
380 unsigned last_level
:8; /**< last mipmap level to use */
383 unsigned first_element
;
384 unsigned last_element
;
387 unsigned swizzle_r
:3; /**< PIPE_SWIZZLE_x for red component */
388 unsigned swizzle_g
:3; /**< PIPE_SWIZZLE_x for green component */
389 unsigned swizzle_b
:3; /**< PIPE_SWIZZLE_x for blue component */
390 unsigned swizzle_a
:3; /**< PIPE_SWIZZLE_x for alpha component */
395 * A view into a writable buffer or texture that can be bound to a shader
398 struct pipe_image_view
400 struct pipe_reference reference
;
401 struct pipe_resource
*resource
; /**< resource into which this is a view */
402 struct pipe_context
*context
; /**< context this view belongs to */
403 enum pipe_format format
; /**< typed PIPE_FORMAT_x */
407 unsigned first_layer
:16; /**< first layer to use for array textures */
408 unsigned last_layer
:16; /**< last layer to use for array textures */
409 unsigned level
:8; /**< mipmap level to use */
412 unsigned first_element
;
413 unsigned last_element
;
420 * Subregion of 1D/2D/3D image resource.
434 * A memory object/resource such as a vertex buffer or texture.
438 struct pipe_reference reference
;
439 struct pipe_screen
*screen
; /**< screen that this texture belongs to */
440 enum pipe_texture_target target
; /**< PIPE_TEXTURE_x */
441 enum pipe_format format
; /**< PIPE_FORMAT_x */
448 unsigned last_level
:8; /**< Index of last mipmap level present/defined */
449 unsigned nr_samples
:8; /**< for multisampled surfaces, nr of samples */
450 unsigned usage
:8; /**< PIPE_USAGE_x (not a bitmask) */
452 unsigned bind
; /**< bitmask of PIPE_BIND_x */
453 unsigned flags
; /**< bitmask of PIPE_RESOURCE_FLAG_x */
458 * Transfer object. For data transfer to/from a resource.
462 struct pipe_resource
*resource
; /**< resource to transfer to/from */
463 unsigned level
; /**< texture mipmap level */
464 enum pipe_transfer_usage usage
;
465 struct pipe_box box
; /**< region of the resource to access */
466 unsigned stride
; /**< row stride in bytes */
467 unsigned layer_stride
; /**< image/layer stride in bytes */
473 * A vertex buffer. Typically, all the vertex data/attributes for
474 * drawing something will be in one buffer. But it's also possible, for
475 * example, to put colors in one buffer and texcoords in another.
477 struct pipe_vertex_buffer
479 unsigned stride
; /**< stride to same attrib in next vertex, in bytes */
480 unsigned buffer_offset
; /**< offset to start of data in buffer, in bytes */
481 struct pipe_resource
*buffer
; /**< the actual buffer */
482 const void *user_buffer
; /**< pointer to a user buffer if buffer == NULL */
487 * A constant buffer. A subrange of an existing buffer can be set
488 * as a constant buffer.
490 struct pipe_constant_buffer
492 struct pipe_resource
*buffer
; /**< the actual buffer */
493 unsigned buffer_offset
; /**< offset to start of data in buffer, in bytes */
494 unsigned buffer_size
; /**< how much data can be read in shader */
495 const void *user_buffer
; /**< pointer to a user buffer if buffer == NULL */
500 * An untyped shader buffer supporting loads, stores, and atomics.
502 struct pipe_shader_buffer
{
503 struct pipe_resource
*buffer
; /**< the actual buffer */
504 unsigned buffer_offset
; /**< offset to start of data in buffer, in bytes */
505 unsigned buffer_size
; /**< how much data can be read in shader */
510 * A stream output target. The structure specifies the range vertices can
513 * In addition to that, the structure should internally maintain the offset
514 * into the buffer, which should be incremented everytime something is written
515 * (appended) to it. The internal offset is buffer_offset + how many bytes
516 * have been written. The internal offset can be stored on the device
517 * and the CPU actually doesn't have to query it.
519 * Note that the buffer_size variable is actually specifying the available
520 * space in the buffer, not the size of the attached buffer.
521 * In other words in majority of cases buffer_size would simply be
522 * 'buffer->width0 - buffer_offset', so buffer_size refers to the size
523 * of the buffer left, after accounting for buffer offset, for stream output
526 * Use PIPE_QUERY_SO_STATISTICS to know how many primitives have
527 * actually been written.
529 struct pipe_stream_output_target
531 struct pipe_reference reference
;
532 struct pipe_resource
*buffer
; /**< the output buffer */
533 struct pipe_context
*context
; /**< context this SO target belongs to */
535 unsigned buffer_offset
; /**< offset where data should be written, in bytes */
536 unsigned buffer_size
; /**< how much data is allowed to be written */
541 * Information to describe a vertex attribute (position, color, etc)
543 struct pipe_vertex_element
545 /** Offset of this attribute, in bytes, from the start of the vertex */
548 /** Instance data rate divisor. 0 means this is per-vertex data,
549 * n means per-instance data used for n consecutive instances (n > 0).
551 unsigned instance_divisor
;
553 /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does
554 * this attribute live in?
556 unsigned vertex_buffer_index
;
558 enum pipe_format src_format
;
563 * An index buffer. When an index buffer is bound, all indices to vertices
564 * will be looked up in the buffer.
566 struct pipe_index_buffer
568 unsigned index_size
; /**< size of an index, in bytes */
569 unsigned offset
; /**< offset to start of data in buffer, in bytes */
570 struct pipe_resource
*buffer
; /**< the actual buffer */
571 const void *user_buffer
; /**< pointer to a user buffer if buffer == NULL */
576 * Information to describe a draw_vbo call.
578 struct pipe_draw_info
580 boolean indexed
; /**< use index buffer */
582 unsigned mode
; /**< the mode of the primitive */
583 unsigned start
; /**< the index of the first vertex */
584 unsigned count
; /**< number of vertices */
586 unsigned start_instance
; /**< first instance id */
587 unsigned instance_count
; /**< number of instances */
589 unsigned vertices_per_patch
; /**< the number of vertices per patch */
592 * For indexed drawing, these fields apply after index lookup.
594 int index_bias
; /**< a bias to be added to each index */
595 unsigned min_index
; /**< the min index */
596 unsigned max_index
; /**< the max index */
599 * Primitive restart enable/index (only applies to indexed drawing)
601 boolean primitive_restart
;
602 unsigned restart_index
;
605 * Stream output target. If not NULL, it's used to provide the 'count'
606 * parameter based on the number vertices captured by the stream output
607 * stage. (or generally, based on the number of bytes captured)
609 * Only 'mode', 'start_instance', and 'instance_count' are taken into
610 * account, all the other variables from pipe_draw_info are ignored.
612 * 'start' is implicitly 0 and 'count' is set as discussed above.
613 * The draw command is non-indexed.
615 * Note that this only provides the count. The vertex buffers must
616 * be set via set_vertex_buffers manually.
618 struct pipe_stream_output_target
*count_from_stream_output
;
620 /* Indirect parameters resource: If not NULL, most values are taken
621 * from this buffer instead, which is laid out as follows:
623 * if indexed is TRUE:
626 * uint32_t instance_count;
628 * int32_t index_bias;
629 * uint32_t start_instance;
634 * uint32_t instance_count;
636 * uint32_t start_instance;
639 struct pipe_resource
*indirect
;
640 unsigned indirect_offset
; /**< must be 4 byte aligned */
645 * Information to describe a blit call.
647 struct pipe_blit_info
650 struct pipe_resource
*resource
;
652 struct pipe_box box
; /**< negative width, height only legal for src */
653 /* For pipe_surface-like format casting: */
654 enum pipe_format format
; /**< must be supported for sampling (src)
655 or rendering (dst), ZS is always supported */
658 unsigned mask
; /**< bitmask of PIPE_MASK_R/G/B/A/Z/S */
659 unsigned filter
; /**< PIPE_TEX_FILTER_* */
661 boolean scissor_enable
;
662 struct pipe_scissor_state scissor
;
664 boolean render_condition_enable
; /**< whether the blit should honor the
665 current render condition */
666 boolean alpha_blend
; /* dst.rgb = src.rgb * src.a + dst.rgb * (1 - src.a) */
671 * Structure used as a header for serialized LLVM programs.
673 struct pipe_llvm_program_header
675 uint32_t num_bytes
; /**< Number of bytes in the LLVM bytecode program. */
678 struct pipe_compute_state
680 const void *prog
; /**< Compute program to be executed. */
681 unsigned req_local_mem
; /**< Required size of the LOCAL resource. */
682 unsigned req_private_mem
; /**< Required size of the PRIVATE resource. */
683 unsigned req_input_mem
; /**< Required size of the INPUT resource. */