lp_rast_priv.h revision 18452c1e87f79327fbd5f27478028b481ee72a5d 
1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
28#ifndef LP_RAST_PRIV_H
29#define LP_RAST_PRIV_H
30
31#include "os/os_thread.h"
32#include "util/u_format.h"
33#include "gallivm/lp_bld_debug.h"
34#include "lp_memory.h"
35#include "lp_rast.h"
36#include "lp_scene.h"
37#include "lp_state.h"
38#include "lp_texture.h"
39#include "lp_tile_soa.h"
40#include "lp_limits.h"
41
42
43/* If we crash in a jitted function, we can examine jit_line and jit_state
44 * to get some info.  This is not thread-safe, however.
45 */
46#ifdef DEBUG
47
48extern int jit_line;
49extern const struct lp_rast_state *jit_state;
50
51#define BEGIN_JIT_CALL(state) \
52   do { \
53      jit_line = __LINE__; \
54      jit_state = state; \
55   } while (0)
56
57#define END_JIT_CALL() \
58   do { \
59      jit_line = 0; \
60      jit_state = NULL; \
61   } while (0)
62
63#else
64
65#define BEGIN_JIT_CALL(X)
66#define END_JIT_CALL()
67
68#endif
69
70
71struct lp_rasterizer;
72
73
74/**
75 * Per-thread rasterization state
76 */
77struct lp_rasterizer_task
78{
79   unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */
80
81   uint8_t *color_tiles[PIPE_MAX_COLOR_BUFS];
82   uint8_t *depth_tile;
83
84   /** "back" pointer */
85   struct lp_rasterizer *rast;
86
87   /** "my" index */
88   unsigned thread_index;
89
90   /* occlude counter for visiable pixels */
91   uint32_t vis_counter;
92   struct llvmpipe_query *query;
93
94   pipe_semaphore work_ready;
95   pipe_semaphore work_done;
96};
97
98
99/**
100 * This is the state required while rasterizing tiles.
101 * Note that this contains per-thread information too.
102 * The tile size is TILE_SIZE x TILE_SIZE pixels.
103 */
104struct lp_rasterizer
105{
106   boolean exit_flag;
107
108   /* Framebuffer stuff
109    */
110   struct {
111      uint8_t *map;
112      unsigned stride;
113      unsigned blocksize;
114   } zsbuf;
115
116   struct {
117      unsigned nr_cbufs;
118      unsigned clear_color;
119      unsigned clear_depth;
120      char clear_stencil;
121   } state;
122
123   /** The incoming queue of scenes ready to rasterize */
124   struct lp_scene_queue *full_scenes;
125
126   /**
127    * The outgoing queue of processed scenes to return to setup module
128    *
129    * XXX: while scenes are per-context but the rasterizer is
130    * (potentially) shared, these empty scenes should be returned to
131    * the context which created them rather than retained here.
132    */
133   /*   struct lp_scene_queue *empty_scenes; */
134
135   /** The scene currently being rasterized by the threads */
136   struct lp_scene *curr_scene;
137
138   /** A task object for each rasterization thread */
139   struct lp_rasterizer_task tasks[LP_MAX_THREADS];
140
141   unsigned num_threads;
142   pipe_thread threads[LP_MAX_THREADS];
143
144   /** For synchronizing the rasterization threads */
145   pipe_barrier barrier;
146};
147
148
149void
150lp_rast_shade_quads_mask(struct lp_rasterizer_task *task,
151                         const struct lp_rast_shader_inputs *inputs,
152                         unsigned x, unsigned y,
153                         unsigned mask);
154
155
156
157/**
158 * Get the pointer to a 4x4 depth/stencil block.
159 * We'll map the z/stencil buffer on demand here.
160 * Note that this may be called even when there's no z/stencil buffer - return
161 * NULL in that case.
162 * \param x, y location of 4x4 block in window coords
163 */
164static INLINE void *
165lp_rast_get_depth_block_pointer(struct lp_rasterizer_task *task,
166                                unsigned x, unsigned y)
167{
168   const struct lp_rasterizer *rast = task->rast;
169   void *depth;
170
171   assert((x % TILE_VECTOR_WIDTH) == 0);
172   assert((y % TILE_VECTOR_HEIGHT) == 0);
173
174   if (!rast->zsbuf.map) {
175      /* Either out of memory or no zsbuf.  Can't tell without access
176       * to the state.  Just use dummy tile memory, but don't print
177       * the oom warning as this most likely because there is no
178       * zsbuf.
179       */
180      return lp_dummy_tile;
181   }
182
183   depth = (rast->zsbuf.map +
184            rast->zsbuf.stride * y +
185            rast->zsbuf.blocksize * x * TILE_VECTOR_HEIGHT);
186
187   assert(lp_check_alignment(depth, 16));
188   return depth;
189}
190
191
192/**
193 * Get pointer to the swizzled color tile
194 */
195static INLINE uint8_t *
196lp_rast_get_color_tile_pointer(struct lp_rasterizer_task *task,
197                               unsigned buf, enum lp_texture_usage usage)
198{
199   struct lp_rasterizer *rast = task->rast;
200
201   assert(task->x % TILE_SIZE == 0);
202   assert(task->y % TILE_SIZE == 0);
203   assert(buf < rast->state.nr_cbufs);
204
205   if (!task->color_tiles[buf]) {
206      struct pipe_surface *cbuf = rast->curr_scene->fb.cbufs[buf];
207      struct llvmpipe_resource *lpt;
208      assert(cbuf);
209      lpt = llvmpipe_resource(cbuf->texture);
210      task->color_tiles[buf] = lp_swizzled_cbuf[task->thread_index][buf];
211
212      if (usage != LP_TEX_USAGE_WRITE_ALL) {
213         llvmpipe_swizzle_cbuf_tile(lpt,
214                                    cbuf->face + cbuf->zslice,
215                                    cbuf->level,
216                                    task->x, task->y,
217                                    task->color_tiles[buf]);
218      }
219   }
220
221   return task->color_tiles[buf];
222}
223
224
225/**
226 * Get the pointer to a 4x4 color block (within a 64x64 tile).
227 * We'll map the color buffer on demand here.
228 * Note that this may be called even when there's no color buffers - return
229 * NULL in that case.
230 * \param x, y location of 4x4 block in window coords
231 */
232static INLINE uint8_t *
233lp_rast_get_color_block_pointer(struct lp_rasterizer_task *task,
234                                unsigned buf, unsigned x, unsigned y)
235{
236   unsigned px, py, pixel_offset;
237   uint8_t *color;
238
239   assert((x % TILE_VECTOR_WIDTH) == 0);
240   assert((y % TILE_VECTOR_HEIGHT) == 0);
241
242   color = lp_rast_get_color_tile_pointer(task, buf, LP_TEX_USAGE_READ_WRITE);
243   assert(color);
244
245   px = x % TILE_SIZE;
246   py = y % TILE_SIZE;
247   pixel_offset = tile_pixel_offset(px, py, 0);
248
249   color = color + pixel_offset;
250
251   assert(lp_check_alignment(color, 16));
252   return color;
253}
254
255
256
257/**
258 * Shade all pixels in a 4x4 block.  The fragment code omits the
259 * triangle in/out tests.
260 * \param x, y location of 4x4 block in window coords
261 */
262static INLINE void
263lp_rast_shade_quads_all( struct lp_rasterizer_task *task,
264                         const struct lp_rast_shader_inputs *inputs,
265                         unsigned x, unsigned y )
266{
267   const struct lp_rasterizer *rast = task->rast;
268   const struct lp_rast_state *state = inputs->state;
269   struct lp_fragment_shader_variant *variant = state->variant;
270   uint8_t *color[PIPE_MAX_COLOR_BUFS];
271   void *depth;
272   unsigned i;
273
274   /* color buffer */
275   for (i = 0; i < rast->state.nr_cbufs; i++)
276      color[i] = lp_rast_get_color_block_pointer(task, i, x, y);
277
278   depth = lp_rast_get_depth_block_pointer(task, x, y);
279
280   /* run shader on 4x4 block */
281   BEGIN_JIT_CALL(state);
282   variant->jit_function[RAST_WHOLE]( &state->jit_context,
283                                      x, y,
284                                      inputs->facing,
285                                      inputs->a0,
286                                      inputs->dadx,
287                                      inputs->dady,
288                                      color,
289                                      depth,
290                                      0xffff,
291                                      &task->vis_counter );
292   END_JIT_CALL();
293}
294
295
296#endif
297