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
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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"
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 * Use the first vertex of a primitive as the provoking vertex for
120 unsigned flatshade_first:1;
123 * When true, triangle rasterization uses (0.5, 0.5) pixel centers
124 * for determining pixel ownership.
126 * When false, triangle rasterization uses (0,0) pixel centers for
127 * determining pixel ownership.
129 * Triangle rasterization always uses a 'top,left' rule for pixel
130 * ownership, this just alters which point we consider the pixel
131 * center for that test.
133 unsigned gl_rasterization_rules:1;
136 float point_size; /**< used when no per-vertex size */
142 struct pipe_poly_stipple
144 unsigned stipple[32];
148 struct pipe_viewport_state
155 struct pipe_scissor_state
164 struct pipe_clip_state
166 float ucp[PIPE_MAX_CLIP_PLANES][4];
171 struct pipe_shader_state
173 const struct tgsi_token *tokens;
177 struct pipe_depth_state
179 unsigned enabled:1; /**< depth test enabled? */
180 unsigned writemask:1; /**< allow depth buffer writes? */
181 unsigned func:3; /**< depth test func (PIPE_FUNC_x) */
185 struct pipe_stencil_state
187 unsigned enabled:1; /**< stencil[0]: stencil enabled, stencil[1]: two-side enabled */
188 unsigned func:3; /**< PIPE_FUNC_x */
189 unsigned fail_op:3; /**< PIPE_STENCIL_OP_x */
190 unsigned zpass_op:3; /**< PIPE_STENCIL_OP_x */
191 unsigned zfail_op:3; /**< PIPE_STENCIL_OP_x */
192 unsigned valuemask:8;
193 unsigned writemask:8;
197 struct pipe_alpha_state
200 unsigned func:3; /**< PIPE_FUNC_x */
201 float ref_value; /**< reference value */
205 struct pipe_depth_stencil_alpha_state
207 struct pipe_depth_state depth;
208 struct pipe_stencil_state stencil[2]; /**< [0] = front, [1] = back */
209 struct pipe_alpha_state alpha;
213 struct pipe_rt_blend_state
215 unsigned blend_enable:1;
217 unsigned rgb_func:3; /**< PIPE_BLEND_x */
218 unsigned rgb_src_factor:5; /**< PIPE_BLENDFACTOR_x */
219 unsigned rgb_dst_factor:5; /**< PIPE_BLENDFACTOR_x */
221 unsigned alpha_func:3; /**< PIPE_BLEND_x */
222 unsigned alpha_src_factor:5; /**< PIPE_BLENDFACTOR_x */
223 unsigned alpha_dst_factor:5; /**< PIPE_BLENDFACTOR_x */
225 unsigned colormask:4; /**< bitmask of PIPE_MASK_R/G/B/A */
228 struct pipe_blend_state
230 unsigned independent_blend_enable:1;
231 unsigned logicop_enable:1;
232 unsigned logicop_func:4; /**< PIPE_LOGICOP_x */
234 struct pipe_rt_blend_state rt[PIPE_MAX_COLOR_BUFS];
238 struct pipe_blend_color
243 struct pipe_stencil_ref
248 struct pipe_framebuffer_state
250 unsigned width, height;
252 /** multiple color buffers for multiple render targets */
254 struct pipe_surface *cbufs[PIPE_MAX_COLOR_BUFS];
256 struct pipe_surface *zsbuf; /**< Z/stencil buffer */
261 * Texture sampler state.
263 struct pipe_sampler_state
265 unsigned wrap_s:3; /**< PIPE_TEX_WRAP_x */
266 unsigned wrap_t:3; /**< PIPE_TEX_WRAP_x */
267 unsigned wrap_r:3; /**< PIPE_TEX_WRAP_x */
268 unsigned min_img_filter:2; /**< PIPE_TEX_FILTER_x */
269 unsigned min_mip_filter:2; /**< PIPE_TEX_MIPFILTER_x */
270 unsigned mag_img_filter:2; /**< PIPE_TEX_FILTER_x */
271 unsigned compare_mode:1; /**< PIPE_TEX_COMPARE_x */
272 unsigned compare_func:3; /**< PIPE_FUNC_x */
273 unsigned normalized_coords:1; /**< Are coords normalized to [0,1]? */
274 unsigned max_anisotropy:6;
275 float lod_bias; /**< LOD/lambda bias */
276 float min_lod, max_lod; /**< LOD clamp range, after bias */
277 float border_color[4];
282 * 2D surface. This is basically a view into a memory buffer.
283 * May be a renderbuffer, texture mipmap level, etc.
287 struct pipe_reference reference;
288 enum pipe_format format;
289 unsigned width; /**< logical width in pixels */
290 unsigned height; /**< logical height in pixels */
291 unsigned layout; /**< PIPE_SURFACE_LAYOUT_x */
292 unsigned offset; /**< offset from start of buffer, in bytes */
293 unsigned usage; /**< bitmask of PIPE_BUFFER_USAGE_x */
296 struct pipe_texture *texture; /**< texture into which this is a view */
303 * A view into a texture that can be bound to a shader stage.
305 struct pipe_sampler_view
307 struct pipe_reference reference;
308 enum pipe_format format; /**< typed PIPE_FORMAT_x */
309 struct pipe_texture *texture; /**< texture into which this is a view */
310 struct pipe_context *context; /**< context this view belongs to */
311 unsigned first_level:8; /**< first mipmap level */
312 unsigned last_level:8; /**< last mipmap level */
313 unsigned swizzle_r:3; /**< PIPE_SWIZZLE_x for red component */
314 unsigned swizzle_g:3; /**< PIPE_SWIZZLE_x for green component */
315 unsigned swizzle_b:3; /**< PIPE_SWIZZLE_x for blue component */
316 unsigned swizzle_a:3; /**< PIPE_SWIZZLE_x for alpha component */
321 * Transfer object. For data transfer to/from a texture.
325 unsigned x; /**< x offset from start of texture image */
326 unsigned y; /**< y offset from start of texture image */
327 unsigned width; /**< logical width in pixels */
328 unsigned height; /**< logical height in pixels */
329 unsigned stride; /**< stride in bytes between rows of blocks */
330 enum pipe_transfer_usage usage; /**< PIPE_TRANSFER_* */
332 struct pipe_texture *texture; /**< texture to transfer to/from */
344 struct pipe_reference reference;
346 enum pipe_texture_target target; /**< PIPE_TEXTURE_x */
347 enum pipe_format format; /**< PIPE_FORMAT_x */
353 unsigned last_level:8; /**< Index of last mipmap level present/defined */
355 unsigned nr_samples:8; /**< for multisampled surfaces, nr of samples */
357 unsigned tex_usage; /**< bitmask of PIPE_TEXTURE_USAGE_* */
359 struct pipe_screen *screen; /**< screen that this texture belongs to */
364 * A vertex buffer. Typically, all the vertex data/attributes for
365 * drawing something will be in one buffer. But it's also possible, for
366 * example, to put colors in one buffer and texcoords in another.
368 struct pipe_vertex_buffer
370 unsigned stride; /**< stride to same attrib in next vertex, in bytes */
371 unsigned max_index; /**< number of vertices in this buffer */
372 unsigned buffer_offset; /**< offset to start of data in buffer, in bytes */
373 struct pipe_buffer *buffer; /**< the actual buffer */
378 * Information to describe a vertex attribute (position, color, etc)
380 struct pipe_vertex_element
382 /** Offset of this attribute, in bytes, from the start of the vertex */
385 /** Instance data rate divisor. 0 means this is per-vertex data,
386 * n means per-instance data used for n consecutive instances (n > 0).
388 unsigned instance_divisor;
390 /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does
391 * this attribute live in?
393 unsigned vertex_buffer_index:8;
395 enum pipe_format src_format;