1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
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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
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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 16
61 #define PIPE_MAX_VERTEX_SAMPLERS 16
62 #define PIPE_MAX_GEOMETRY_SAMPLERS 16
63 #define PIPE_MAX_SHADER_INPUTS 32
64 #define PIPE_MAX_SHADER_OUTPUTS 32
65 #define PIPE_MAX_SHADER_SAMPLER_VIEWS 32
66 #define PIPE_MAX_SHADER_RESOURCES 32
67 #define PIPE_MAX_TEXTURE_LEVELS 16
68 #define PIPE_MAX_SO_BUFFERS 4
73 int32_t count
; /* atomic */
79 * Primitive (point/line/tri) rasterization info
81 struct pipe_rasterizer_state
84 unsigned light_twoside
:1;
85 unsigned clamp_vertex_color
:1;
86 unsigned clamp_fragment_color
:1;
88 unsigned cull_face
:2; /**< PIPE_FACE_x */
89 unsigned fill_front
:2; /**< PIPE_POLYGON_MODE_x */
90 unsigned fill_back
:2; /**< PIPE_POLYGON_MODE_x */
91 unsigned offset_point
:1;
92 unsigned offset_line
:1;
93 unsigned offset_tri
:1;
95 unsigned poly_smooth
:1;
96 unsigned poly_stipple_enable
:1;
97 unsigned point_smooth
:1;
98 unsigned sprite_coord_mode
:1; /**< PIPE_SPRITE_COORD_ */
99 unsigned point_quad_rasterization
:1; /** points rasterized as quads or points */
100 unsigned point_size_per_vertex
:1; /**< size computed in vertex shader */
101 unsigned multisample
:1; /* XXX maybe more ms state in future */
102 unsigned line_smooth
:1;
103 unsigned line_stipple_enable
:1;
104 unsigned line_last_pixel
:1;
107 * Use the first vertex of a primitive as the provoking vertex for
110 unsigned flatshade_first
:1;
113 * When true, triangle rasterization uses (0.5, 0.5) pixel centers
114 * for determining pixel ownership.
116 * When false, triangle rasterization uses (0,0) pixel centers for
117 * determining pixel ownership.
119 * Triangle rasterization always uses a 'top,left' rule for pixel
120 * ownership, this just alters which point we consider the pixel
121 * center for that test.
123 unsigned gl_rasterization_rules
:1;
126 * When true, rasterization is disabled and no pixels are written.
127 * This only makes sense with the Stream Out functionality.
129 unsigned rasterizer_discard
:1;
132 * When false, depth clipping is disabled and the depth value will be
133 * clamped later at the per-pixel level before depth testing.
134 * This depends on PIPE_CAP_DEPTH_CLIP_DISABLE.
136 unsigned depth_clip
:1;
139 * Enable bits for clipping half-spaces.
140 * This applies to both user clip planes and shader clip distances.
141 * Note that if the bound shader exports any clip distances, these
142 * replace all user clip planes, and clip half-spaces enabled here
143 * but not written by the shader count as disabled.
145 unsigned clip_plane_enable
:PIPE_MAX_CLIP_PLANES
;
147 unsigned line_stipple_factor
:8; /**< [1..256] actually */
148 unsigned line_stipple_pattern
:16;
150 unsigned sprite_coord_enable
:PIPE_MAX_SHADER_OUTPUTS
;
153 float point_size
; /**< used when no per-vertex size */
160 struct pipe_poly_stipple
162 unsigned stipple
[32];
166 struct pipe_viewport_state
173 struct pipe_scissor_state
182 struct pipe_clip_state
184 float ucp
[PIPE_MAX_CLIP_PLANES
][4];
189 * Stream output for vertex transform feedback.
191 struct pipe_stream_output_info
193 unsigned num_outputs
;
194 /** stride for an entire vertex for each buffer in dwords */
195 unsigned stride
[PIPE_MAX_SO_BUFFERS
];
198 * Array of stream outputs, in the order they are to be written in.
199 * Selected components are tightly packed into the output buffer.
202 unsigned register_index
:8; /**< 0 to PIPE_MAX_SHADER_OUTPUTS */
203 unsigned start_component
:2; /** 0 to 3 */
204 unsigned num_components
:3; /** 1 to 4 */
205 unsigned output_buffer
:3; /**< 0 to PIPE_MAX_SO_BUFFERS */
206 unsigned dst_offset
:16; /**< offset into the buffer in dwords */
207 } output
[PIPE_MAX_SHADER_OUTPUTS
];
211 struct pipe_shader_state
213 const struct tgsi_token
*tokens
;
214 struct pipe_stream_output_info stream_output
;
218 struct pipe_depth_state
220 unsigned enabled
:1; /**< depth test enabled? */
221 unsigned writemask
:1; /**< allow depth buffer writes? */
222 unsigned func
:3; /**< depth test func (PIPE_FUNC_x) */
226 struct pipe_stencil_state
228 unsigned enabled
:1; /**< stencil[0]: stencil enabled, stencil[1]: two-side enabled */
229 unsigned func
:3; /**< PIPE_FUNC_x */
230 unsigned fail_op
:3; /**< PIPE_STENCIL_OP_x */
231 unsigned zpass_op
:3; /**< PIPE_STENCIL_OP_x */
232 unsigned zfail_op
:3; /**< PIPE_STENCIL_OP_x */
233 unsigned valuemask
:8;
234 unsigned writemask
:8;
238 struct pipe_alpha_state
241 unsigned func
:3; /**< PIPE_FUNC_x */
242 float ref_value
; /**< reference value */
246 struct pipe_depth_stencil_alpha_state
248 struct pipe_depth_state depth
;
249 struct pipe_stencil_state stencil
[2]; /**< [0] = front, [1] = back */
250 struct pipe_alpha_state alpha
;
254 struct pipe_rt_blend_state
256 unsigned blend_enable
:1;
258 unsigned rgb_func
:3; /**< PIPE_BLEND_x */
259 unsigned rgb_src_factor
:5; /**< PIPE_BLENDFACTOR_x */
260 unsigned rgb_dst_factor
:5; /**< PIPE_BLENDFACTOR_x */
262 unsigned alpha_func
:3; /**< PIPE_BLEND_x */
263 unsigned alpha_src_factor
:5; /**< PIPE_BLENDFACTOR_x */
264 unsigned alpha_dst_factor
:5; /**< PIPE_BLENDFACTOR_x */
266 unsigned colormask
:4; /**< bitmask of PIPE_MASK_R/G/B/A */
269 struct pipe_blend_state
271 unsigned independent_blend_enable
:1;
272 unsigned logicop_enable
:1;
273 unsigned logicop_func
:4; /**< PIPE_LOGICOP_x */
275 unsigned alpha_to_coverage
:1;
276 unsigned alpha_to_one
:1;
277 struct pipe_rt_blend_state rt
[PIPE_MAX_COLOR_BUFS
];
281 struct pipe_blend_color
286 struct pipe_stencil_ref
291 struct pipe_framebuffer_state
293 unsigned width
, height
;
295 /** multiple color buffers for multiple render targets */
297 struct pipe_surface
*cbufs
[PIPE_MAX_COLOR_BUFS
];
299 struct pipe_surface
*zsbuf
; /**< Z/stencil buffer */
304 * Texture sampler state.
306 struct pipe_sampler_state
308 unsigned wrap_s
:3; /**< PIPE_TEX_WRAP_x */
309 unsigned wrap_t
:3; /**< PIPE_TEX_WRAP_x */
310 unsigned wrap_r
:3; /**< PIPE_TEX_WRAP_x */
311 unsigned min_img_filter
:2; /**< PIPE_TEX_FILTER_x */
312 unsigned min_mip_filter
:2; /**< PIPE_TEX_MIPFILTER_x */
313 unsigned mag_img_filter
:2; /**< PIPE_TEX_FILTER_x */
314 unsigned compare_mode
:1; /**< PIPE_TEX_COMPARE_x */
315 unsigned compare_func
:3; /**< PIPE_FUNC_x */
316 unsigned normalized_coords
:1; /**< Are coords normalized to [0,1]? */
317 unsigned max_anisotropy
:6;
318 unsigned seamless_cube_map
:1;
319 float lod_bias
; /**< LOD/lambda bias */
320 float min_lod
, max_lod
; /**< LOD clamp range, after bias */
321 union pipe_color_union border_color
;
326 * A view into a texture that can be bound to a color render target /
327 * depth stencil attachment point.
331 struct pipe_reference reference
;
332 struct pipe_resource
*texture
; /**< resource into which this is a view */
333 struct pipe_context
*context
; /**< context this surface belongs to */
334 enum pipe_format format
;
336 /* XXX width/height should be removed */
337 unsigned width
; /**< logical width in pixels */
338 unsigned height
; /**< logical height in pixels */
340 unsigned usage
; /**< bitmask of PIPE_BIND_x */
341 unsigned writable
:1; /**< writable shader resource */
346 unsigned first_layer
:16;
347 unsigned last_layer
:16;
350 unsigned first_element
;
351 unsigned last_element
;
358 * A view into a texture that can be bound to a shader stage.
360 struct pipe_sampler_view
362 struct pipe_reference reference
;
363 enum pipe_format format
; /**< typed PIPE_FORMAT_x */
364 struct pipe_resource
*texture
; /**< texture into which this is a view */
365 struct pipe_context
*context
; /**< context this view belongs to */
368 unsigned first_layer
:16; /**< first layer to use for array textures */
369 unsigned last_layer
:16; /**< last layer to use for array textures */
370 unsigned first_level
:8; /**< first mipmap level to use */
371 unsigned last_level
:8; /**< last mipmap level to use */
374 unsigned first_element
;
375 unsigned last_element
;
378 unsigned swizzle_r
:3; /**< PIPE_SWIZZLE_x for red component */
379 unsigned swizzle_g
:3; /**< PIPE_SWIZZLE_x for green component */
380 unsigned swizzle_b
:3; /**< PIPE_SWIZZLE_x for blue component */
381 unsigned swizzle_a
:3; /**< PIPE_SWIZZLE_x for alpha component */
386 * Subregion of 1D/2D/3D image resource.
400 * A memory object/resource such as a vertex buffer or texture.
404 struct pipe_reference reference
;
405 struct pipe_screen
*screen
; /**< screen that this texture belongs to */
406 enum pipe_texture_target target
; /**< PIPE_TEXTURE_x */
407 enum pipe_format format
; /**< PIPE_FORMAT_x */
414 unsigned last_level
:8; /**< Index of last mipmap level present/defined */
415 unsigned nr_samples
:8; /**< for multisampled surfaces, nr of samples */
416 unsigned usage
:8; /**< PIPE_USAGE_x (not a bitmask) */
418 unsigned bind
; /**< bitmask of PIPE_BIND_x */
419 unsigned flags
; /**< bitmask of PIPE_RESOURCE_FLAG_x */
424 * Transfer object. For data transfer to/from a resource.
428 struct pipe_resource
*resource
; /**< resource to transfer to/from */
429 unsigned level
; /**< texture mipmap level */
430 enum pipe_transfer_usage usage
;
431 struct pipe_box box
; /**< region of the resource to access */
432 unsigned stride
; /**< row stride in bytes */
433 unsigned layer_stride
; /**< image/layer stride in bytes */
440 * A vertex buffer. Typically, all the vertex data/attributes for
441 * drawing something will be in one buffer. But it's also possible, for
442 * example, to put colors in one buffer and texcoords in another.
444 struct pipe_vertex_buffer
446 unsigned stride
; /**< stride to same attrib in next vertex, in bytes */
447 unsigned buffer_offset
; /**< offset to start of data in buffer, in bytes */
448 struct pipe_resource
*buffer
; /**< the actual buffer */
449 const void *user_buffer
; /**< pointer to a user buffer if buffer == NULL */
454 * A constant buffer. A subrange of an existing buffer can be set
455 * as a constant buffer.
457 struct pipe_constant_buffer
{
458 struct pipe_resource
*buffer
; /**< the actual buffer */
459 unsigned buffer_offset
; /**< offset to start of data in buffer, in bytes */
460 unsigned buffer_size
; /**< how much data can be read in shader */
461 const void *user_buffer
; /**< pointer to a user buffer if buffer == NULL */
466 * A stream output target. The structure specifies the range vertices can
469 * In addition to that, the structure should internally maintain the offset
470 * into the buffer, which should be incremented everytime something is written
471 * (appended) to it. The internal offset is buffer_offset + how many bytes
472 * have been written. The internal offset can be stored on the device
473 * and the CPU actually doesn't have to query it.
475 * Use PIPE_QUERY_SO_STATISTICS to know how many primitives have
476 * actually been written.
478 struct pipe_stream_output_target
480 struct pipe_reference reference
;
481 struct pipe_resource
*buffer
; /**< the output buffer */
482 struct pipe_context
*context
; /**< context this SO target belongs to */
484 unsigned buffer_offset
; /**< offset where data should be written, in bytes */
485 unsigned buffer_size
; /**< how much data is allowed to be written */
490 * Information to describe a vertex attribute (position, color, etc)
492 struct pipe_vertex_element
494 /** Offset of this attribute, in bytes, from the start of the vertex */
497 /** Instance data rate divisor. 0 means this is per-vertex data,
498 * n means per-instance data used for n consecutive instances (n > 0).
500 unsigned instance_divisor
;
502 /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does
503 * this attribute live in?
505 unsigned vertex_buffer_index
;
507 enum pipe_format src_format
;
512 * An index buffer. When an index buffer is bound, all indices to vertices
513 * will be looked up in the buffer.
515 struct pipe_index_buffer
517 unsigned index_size
; /**< size of an index, in bytes */
518 unsigned offset
; /**< offset to start of data in buffer, in bytes */
519 struct pipe_resource
*buffer
; /**< the actual buffer */
520 const void *user_buffer
; /**< pointer to a user buffer if buffer == NULL */
525 * Information to describe a draw_vbo call.
527 struct pipe_draw_info
529 boolean indexed
; /**< use index buffer */
531 unsigned mode
; /**< the mode of the primitive */
532 unsigned start
; /**< the index of the first vertex */
533 unsigned count
; /**< number of vertices */
535 unsigned start_instance
; /**< first instance id */
536 unsigned instance_count
; /**< number of instances */
539 * For indexed drawing, these fields apply after index lookup.
541 int index_bias
; /**< a bias to be added to each index */
542 unsigned min_index
; /**< the min index */
543 unsigned max_index
; /**< the max index */
546 * Primitive restart enable/index (only applies to indexed drawing)
548 boolean primitive_restart
;
549 unsigned restart_index
;
552 * Stream output target. If not NULL, it's used to provide the 'count'
553 * parameter based on the number vertices captured by the stream output
554 * stage. (or generally, based on the number of bytes captured)
556 * Only 'mode', 'start_instance', and 'instance_count' are taken into
557 * account, all the other variables from pipe_draw_info are ignored.
559 * 'start' is implicitly 0 and 'count' is set as discussed above.
560 * The draw command is non-indexed.
562 * Note that this only provides the count. The vertex buffers must
563 * be set via set_vertex_buffers manually.
565 struct pipe_stream_output_target
*count_from_stream_output
;
570 * Information to describe a resource_resolve call.
572 struct pipe_resolve_info
575 struct pipe_surface
*surface
;
576 int x0
; /**< always left */
577 int y0
; /**< always top */
578 int x1
; /**< determines scale if PIPE_CAP_SCALED_RESOLVE is supported */
579 int y1
; /**< determines scale if PIPE_CAP_SCALED_RESOLVE is supported */
583 struct pipe_resource
*res
;
587 int x1
; /**< may be < x0 only if PIPE_CAP_SCALED_RESOLVE is supported */
588 int y1
; /**< may be < y0 even if PIPE_CAP_SCALED_RESOLVE not supported */
591 unsigned mask
; /**< PIPE_MASK_RGBA, Z, S or ZS */
595 * Structure used as a header for serialized LLVM programs.
597 struct pipe_llvm_program_header
599 uint32_t num_bytes
; /**< Number of bytes in the LLVM bytecode program. */
602 struct pipe_compute_state
604 const void *prog
; /**< Compute program to be executed. */
605 unsigned req_local_mem
; /**< Required size of the LOCAL resource. */
606 unsigned req_private_mem
; /**< Required size of the PRIVATE resource. */
607 unsigned req_input_mem
; /**< Required size of the INPUT resource. */