1 
2 /**************************************************************************
3  *
4  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
5  * All Rights Reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the
9  * "Software"), to deal in the Software without restriction, including
10  * without limitation the rights to use, copy, modify, merge, publish,
11  * distribute, sub license, and/or sell copies of the Software, and to
12  * permit persons to whom the Software is furnished to do so, subject to
13  * the following conditions:
14  *
15  * The above copyright notice and this permission notice (including the
16  * next paragraph) shall be included in all copies or substantial portions
17  * of the Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26  *
27  **************************************************************************/
28 
29 /**
30  * \brief  Public interface into the drawing module.
31  */
32 
33 /* Authors:  Keith Whitwell <keith@tungstengraphics.com>
34  */
35 
36 
37 #ifndef DRAW_CONTEXT_H
38 #define DRAW_CONTEXT_H
39 
40 
41 #include "pipe/p_state.h"
42 #include "tgsi/tgsi_exec.h"
43 
44 struct pipe_context;
45 struct draw_context;
46 struct draw_stage;
47 struct draw_vertex_shader;
48 struct draw_geometry_shader;
49 struct draw_fragment_shader;
50 struct tgsi_sampler;
51 
52 /*
53  * structure to contain driver internal information
54  * for stream out support. mapping stores the pointer
55  * to the buffer contents, and internal offset stores
56  * stores an internal counter to how much of the stream
57  * out buffer is used (in bytes).
58  */
59 struct draw_so_target {
60    struct pipe_stream_output_target target;
61    void *mapping;
62    int internal_offset;
63 };
64 
65 struct draw_context *draw_create( struct pipe_context *pipe );
66 
67 struct draw_context *draw_create_no_llvm(struct pipe_context *pipe);
68 
69 void draw_destroy( struct draw_context *draw );
70 
71 void draw_flush(struct draw_context *draw);
72 
73 void draw_set_viewport_state( struct draw_context *draw,
74                               const struct pipe_viewport_state *viewport );
75 
76 void draw_set_clip_state( struct draw_context *pipe,
77                           const struct pipe_clip_state *clip );
78 
79 /**
80  * Sets the rasterization state used by the draw module.
81  * The rast_handle is used to pass the driver specific representation
82  * of the rasterization state. It's going to be used when the
83  * draw module sets the state back on the driver itself using the
84  * pipe::bind_rasterizer_state method.
85  *
86  * NOTE: if you're calling this function from within the pipe's
87  * bind_rasterizer_state you should always call it before binding
88  * the actual state - that's because the draw module can try to
89  * bind its own rasterizer state which would reset your newly
90  * set state. i.e. always do
91  * draw_set_rasterizer_state(driver->draw, state->pipe_state, state);
92  * driver->state.raster = state;
93  */
94 void draw_set_rasterizer_state( struct draw_context *draw,
95                                 const struct pipe_rasterizer_state *raster,
96                                 void *rast_handle );
97 
98 void draw_set_rasterize_stage( struct draw_context *draw,
99                                struct draw_stage *stage );
100 
101 void draw_wide_point_threshold(struct draw_context *draw, float threshold);
102 
103 void draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite);
104 
105 void draw_wide_line_threshold(struct draw_context *draw, float threshold);
106 
107 void draw_enable_line_stipple(struct draw_context *draw, boolean enable);
108 
109 void draw_enable_point_sprites(struct draw_context *draw, boolean enable);
110 
111 void draw_set_mrd(struct draw_context *draw, double mrd);
112 
113 boolean
114 draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe);
115 
116 boolean
117 draw_install_aapoint_stage(struct draw_context *draw, struct pipe_context *pipe);
118 
119 boolean
120 draw_install_pstipple_stage(struct draw_context *draw, struct pipe_context *pipe);
121 
122 
123 struct tgsi_shader_info *
124 draw_get_shader_info(const struct draw_context *draw);
125 
126 int
127 draw_find_shader_output(const struct draw_context *draw,
128                         uint semantic_name, uint semantic_index);
129 
130 uint
131 draw_num_shader_outputs(const struct draw_context *draw);
132 
133 
134 void
135 draw_texture_samplers(struct draw_context *draw,
136                       uint shader_type,
137                       uint num_samplers,
138                       struct tgsi_sampler **samplers);
139 
140 void
141 draw_set_sampler_views(struct draw_context *draw,
142                        unsigned shader_stage,
143                        struct pipe_sampler_view **views,
144                        unsigned num);
145 void
146 draw_set_samplers(struct draw_context *draw,
147                   unsigned shader_stage,
148                   struct pipe_sampler_state **samplers,
149                   unsigned num);
150 
151 void
152 draw_set_mapped_texture(struct draw_context *draw,
153                         unsigned shader_stage,
154                         unsigned sampler_idx,
155                         uint32_t width, uint32_t height, uint32_t depth,
156                         uint32_t first_level, uint32_t last_level,
157                         uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS],
158                         uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS],
159                         const void *data[PIPE_MAX_TEXTURE_LEVELS]);
160 
161 
162 /*
163  * Vertex shader functions
164  */
165 
166 struct draw_vertex_shader *
167 draw_create_vertex_shader(struct draw_context *draw,
168                           const struct pipe_shader_state *shader);
169 void draw_bind_vertex_shader(struct draw_context *draw,
170                              struct draw_vertex_shader *dvs);
171 void draw_delete_vertex_shader(struct draw_context *draw,
172                                struct draw_vertex_shader *dvs);
173 
174 
175 /*
176  * Fragment shader functions
177  */
178 struct draw_fragment_shader *
179 draw_create_fragment_shader(struct draw_context *draw,
180                             const struct pipe_shader_state *shader);
181 void draw_bind_fragment_shader(struct draw_context *draw,
182                                struct draw_fragment_shader *dvs);
183 void draw_delete_fragment_shader(struct draw_context *draw,
184                                  struct draw_fragment_shader *dvs);
185 
186 /*
187  * Geometry shader functions
188  */
189 struct draw_geometry_shader *
190 draw_create_geometry_shader(struct draw_context *draw,
191                             const struct pipe_shader_state *shader);
192 void draw_bind_geometry_shader(struct draw_context *draw,
193                                struct draw_geometry_shader *dvs);
194 void draw_delete_geometry_shader(struct draw_context *draw,
195                                  struct draw_geometry_shader *dvs);
196 
197 
198 /*
199  * Vertex data functions
200  */
201 
202 void draw_set_vertex_buffers(struct draw_context *draw,
203                              unsigned count,
204                              const struct pipe_vertex_buffer *buffers);
205 
206 void draw_set_vertex_elements(struct draw_context *draw,
207 			      unsigned count,
208                               const struct pipe_vertex_element *elements);
209 
210 void draw_set_indexes(struct draw_context *draw,
211                       const void *elements, unsigned elem_size);
212 
213 void draw_set_mapped_vertex_buffer(struct draw_context *draw,
214                                    unsigned attr, const void *buffer);
215 
216 void
217 draw_set_mapped_constant_buffer(struct draw_context *draw,
218                                 unsigned shader_type,
219                                 unsigned slot,
220                                 const void *buffer,
221                                 unsigned size);
222 
223 void
224 draw_set_mapped_so_buffers(struct draw_context *draw,
225                            void *buffers[PIPE_MAX_SO_BUFFERS],
226                            unsigned num_buffers);
227 
228 void
229 draw_set_mapped_so_targets(struct draw_context *draw,
230                            int num_targets,
231                            struct draw_so_target *targets[PIPE_MAX_SO_BUFFERS]);
232 
233 void
234 draw_set_so_state(struct draw_context *draw,
235                   struct pipe_stream_output_info *state);
236 
237 
238 /***********************************************************************
239  * draw_pt.c
240  */
241 
242 void draw_vbo(struct draw_context *draw,
243               const struct pipe_draw_info *info);
244 
245 void draw_arrays(struct draw_context *draw, unsigned prim,
246 		 unsigned start, unsigned count);
247 
248 void
249 draw_arrays_instanced(struct draw_context *draw,
250                       unsigned mode,
251                       unsigned start,
252                       unsigned count,
253                       unsigned startInstance,
254                       unsigned instanceCount);
255 
256 
257 /*******************************************************************************
258  * Driver backend interface
259  */
260 struct vbuf_render;
261 void draw_set_render( struct draw_context *draw,
262 		      struct vbuf_render *render );
263 
264 void draw_set_driver_clipping( struct draw_context *draw,
265                                boolean bypass_clip_xy,
266                                boolean bypass_clip_z,
267                                boolean guard_band_xy);
268 
269 void draw_set_force_passthrough( struct draw_context *draw,
270                                  boolean enable );
271 
272 /*******************************************************************************
273  * Draw pipeline
274  */
275 boolean draw_need_pipeline(const struct draw_context *draw,
276                            const struct pipe_rasterizer_state *rasterizer,
277                            unsigned prim );
278 
279 int
280 draw_get_shader_param(unsigned shader, enum pipe_shader_cap param);
281 
282 int
283 draw_get_shader_param_no_llvm(unsigned shader, enum pipe_shader_cap param);
284 
285 #endif /* DRAW_CONTEXT_H */
286