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
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 TUNGSTEN GRAPHICS 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"
55 * Implementation limits
57 #define PIPE_MAX_ATTRIBS 32
58 #define PIPE_MAX_CLIP_PLANES 6
59 #define PIPE_MAX_COLOR_BUFS 8
60 #define PIPE_MAX_CONSTANT_BUFFERS 32
61 #define PIPE_MAX_SAMPLERS 16
62 #define PIPE_MAX_VERTEX_SAMPLERS 16
63 #define PIPE_MAX_SHADER_INPUTS 16
64 #define PIPE_MAX_SHADER_OUTPUTS 16
65 #define PIPE_MAX_TEXTURE_LEVELS 16
70 int32_t count
; /* atomic */
75 * The driver will certainly subclass this to include actual memory
76 * management information.
80 struct pipe_reference reference
;
82 struct pipe_screen
*screen
;
89 * Primitive (point/line/tri) rasterization info
91 struct pipe_rasterizer_state
94 unsigned light_twoside
:1;
95 unsigned front_winding
:2; /**< PIPE_WINDING_x */
96 unsigned cull_mode
:2; /**< PIPE_WINDING_x */
97 unsigned fill_cw
:2; /**< PIPE_POLYGON_MODE_x */
98 unsigned fill_ccw
:2; /**< PIPE_POLYGON_MODE_x */
100 unsigned offset_ccw
:1;
102 unsigned poly_smooth
:1;
103 unsigned poly_stipple_enable
:1;
104 unsigned point_smooth
:1;
105 unsigned sprite_coord_enable
:PIPE_MAX_SHADER_OUTPUTS
;
106 unsigned sprite_coord_mode
:1; /**< PIPE_SPRITE_COORD_ */
107 unsigned point_quad_rasterization
:1; /** points rasterized as quads or points */
108 unsigned point_size_per_vertex
:1; /**< size computed in vertex shader */
109 unsigned multisample
:1; /* XXX maybe more ms state in future */
110 unsigned line_smooth
:1;
111 unsigned line_stipple_enable
:1;
112 unsigned line_stipple_factor
:8; /**< [1..256] actually */
113 unsigned line_stipple_pattern
:16;
114 unsigned line_last_pixel
:1;
117 * Vertex coordinates are pre-transformed to screen space. Skip
118 * the vertex shader, clipping and viewport processing. Note that
119 * a vertex shader is still needed though, to indicate the mapping
120 * from vertex elements to fragment shader input semantics.
122 * XXX: considered for removal.
124 unsigned bypass_vs_clip_and_viewport
:1;
127 * Use the first vertex of a primitive as the provoking vertex for
130 unsigned flatshade_first
:1;
133 * When true, triangle rasterization uses (0.5, 0.5) pixel centers
134 * for determining pixel ownership.
136 * When false, triangle rasterization uses (0,0) pixel centers for
137 * determining pixel ownership.
139 * Triangle rasterization always uses a 'top,left' rule for pixel
140 * ownership, this just alters which point we consider the pixel
141 * center for that test.
143 unsigned gl_rasterization_rules
:1;
146 float point_size
; /**< used when no per-vertex size */
152 struct pipe_poly_stipple
154 unsigned stipple
[32];
158 struct pipe_viewport_state
165 struct pipe_scissor_state
174 struct pipe_clip_state
176 float ucp
[PIPE_MAX_CLIP_PLANES
][4];
181 struct pipe_shader_state
183 const struct tgsi_token
*tokens
;
187 struct pipe_depth_state
189 unsigned enabled
:1; /**< depth test enabled? */
190 unsigned writemask
:1; /**< allow depth buffer writes? */
191 unsigned func
:3; /**< depth test func (PIPE_FUNC_x) */
195 struct pipe_stencil_state
197 unsigned enabled
:1; /**< stencil[0]: stencil enabled, stencil[1]: two-side enabled */
198 unsigned func
:3; /**< PIPE_FUNC_x */
199 unsigned fail_op
:3; /**< PIPE_STENCIL_OP_x */
200 unsigned zpass_op
:3; /**< PIPE_STENCIL_OP_x */
201 unsigned zfail_op
:3; /**< PIPE_STENCIL_OP_x */
202 unsigned valuemask
:8;
203 unsigned writemask
:8;
207 struct pipe_alpha_state
210 unsigned func
:3; /**< PIPE_FUNC_x */
211 float ref_value
; /**< reference value */
215 struct pipe_depth_stencil_alpha_state
217 struct pipe_depth_state depth
;
218 struct pipe_stencil_state stencil
[2]; /**< [0] = front, [1] = back */
219 struct pipe_alpha_state alpha
;
223 struct pipe_rt_blend_state
225 unsigned blend_enable
:1;
227 unsigned rgb_func
:3; /**< PIPE_BLEND_x */
228 unsigned rgb_src_factor
:5; /**< PIPE_BLENDFACTOR_x */
229 unsigned rgb_dst_factor
:5; /**< PIPE_BLENDFACTOR_x */
231 unsigned alpha_func
:3; /**< PIPE_BLEND_x */
232 unsigned alpha_src_factor
:5; /**< PIPE_BLENDFACTOR_x */
233 unsigned alpha_dst_factor
:5; /**< PIPE_BLENDFACTOR_x */
235 unsigned colormask
:4; /**< bitmask of PIPE_MASK_R/G/B/A */
238 struct pipe_blend_state
240 unsigned independent_blend_enable
:1;
241 unsigned logicop_enable
:1;
242 unsigned logicop_func
:4; /**< PIPE_LOGICOP_x */
244 struct pipe_rt_blend_state rt
[PIPE_MAX_COLOR_BUFS
];
248 struct pipe_blend_color
253 struct pipe_stencil_ref
258 struct pipe_framebuffer_state
260 unsigned width
, height
;
262 /** multiple colorbuffers for multiple render targets */
264 struct pipe_surface
*cbufs
[PIPE_MAX_COLOR_BUFS
];
266 struct pipe_surface
*zsbuf
; /**< Z/stencil buffer */
271 * Texture sampler state.
273 struct pipe_sampler_state
275 unsigned wrap_s
:3; /**< PIPE_TEX_WRAP_x */
276 unsigned wrap_t
:3; /**< PIPE_TEX_WRAP_x */
277 unsigned wrap_r
:3; /**< PIPE_TEX_WRAP_x */
278 unsigned min_img_filter
:2; /**< PIPE_TEX_FILTER_x */
279 unsigned min_mip_filter
:2; /**< PIPE_TEX_MIPFILTER_x */
280 unsigned mag_img_filter
:2; /**< PIPE_TEX_FILTER_x */
281 unsigned compare_mode
:1; /**< PIPE_TEX_COMPARE_x */
282 unsigned compare_func
:3; /**< PIPE_FUNC_x */
283 unsigned normalized_coords
:1; /**< Are coords normalized to [0,1]? */
284 float lod_bias
; /**< LOD/lambda bias */
285 float min_lod
, max_lod
; /**< LOD clamp range, after bias */
286 float border_color
[4];
287 float max_anisotropy
;
292 * 2D surface. This is basically a view into a memory buffer.
293 * May be a renderbuffer, texture mipmap level, etc.
297 struct pipe_reference reference
;
298 enum pipe_format format
; /**< PIPE_FORMAT_x */
299 unsigned width
; /**< logical width in pixels */
300 unsigned height
; /**< logical height in pixels */
301 unsigned layout
; /**< PIPE_SURFACE_LAYOUT_x */
302 unsigned offset
; /**< offset from start of buffer, in bytes */
303 unsigned usage
; /**< PIPE_BUFFER_USAGE_* */
306 struct pipe_texture
*texture
; /**< texture into which this is a view */
313 * Transfer object. For data transfer to/from a texture.
317 unsigned x
; /**< x offset from start of texture image */
318 unsigned y
; /**< y offset from start of texture image */
319 unsigned width
; /**< logical width in pixels */
320 unsigned height
; /**< logical height in pixels */
321 unsigned stride
; /**< stride in bytes between rows of blocks */
322 enum pipe_transfer_usage usage
; /**< PIPE_TRANSFER_* */
324 struct pipe_texture
*texture
; /**< texture to transfer to/from */
336 struct pipe_reference reference
;
338 enum pipe_texture_target target
; /**< PIPE_TEXTURE_x */
339 enum pipe_format format
; /**< PIPE_FORMAT_x */
345 unsigned last_level
:8; /**< Index of last mipmap level present/defined */
347 unsigned nr_samples
:8; /**< for multisampled surfaces, nr of samples */
349 unsigned tex_usage
; /* PIPE_TEXTURE_USAGE_* */
351 struct pipe_screen
*screen
; /**< screen that this texture belongs to */
356 * A vertex buffer. Typically, all the vertex data/attributes for
357 * drawing something will be in one buffer. But it's also possible, for
358 * example, to put colors in one buffer and texcoords in another.
360 struct pipe_vertex_buffer
362 unsigned stride
; /**< stride to same attrib in next vertex, in bytes */
363 unsigned max_index
; /**< number of vertices in this buffer */
364 unsigned buffer_offset
; /**< offset to start of data in buffer, in bytes */
365 struct pipe_buffer
*buffer
; /**< the actual buffer */
370 * Information to describe a vertex attribute (position, color, etc)
372 struct pipe_vertex_element
374 /** Offset of this attribute, in bytes, from the start of the vertex */
377 /** Instance data rate divisor. 0 means this is per-vertex data,
378 * n means per-instance data used for n consecutive instances (n > 0).
380 unsigned instance_divisor
;
382 /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does
383 * this attribute live in?
385 unsigned vertex_buffer_index
:8;
386 unsigned nr_components
:8;
388 enum pipe_format src_format
; /**< PIPE_FORMAT_* */