u_inlines.h revision 507337864fa80caf9f26602324d2c28dd0a75d61 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 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.
25 *
26 **************************************************************************/
27
28#ifndef U_INLINES_H
29#define U_INLINES_H
30
31#include "pipe/p_context.h"
32#include "pipe/p_defines.h"
33#include "pipe/p_state.h"
34#include "pipe/p_screen.h"
35#include "util/u_debug.h"
36#include "util/u_debug_describe.h"
37#include "util/u_debug_refcnt.h"
38#include "util/u_atomic.h"
39#include "util/u_box.h"
40#include "util/u_math.h"
41
42
43#ifdef __cplusplus
44extern "C" {
45#endif
46
47
48/*
49 * Reference counting helper functions.
50 */
51
52
53static INLINE void
54pipe_reference_init(struct pipe_reference *reference, unsigned count)
55{
56   p_atomic_set(&reference->count, count);
57}
58
59static INLINE boolean
60pipe_is_referenced(struct pipe_reference *reference)
61{
62   return p_atomic_read(&reference->count) != 0;
63}
64
65/**
66 * Update reference counting.
67 * The old thing pointed to, if any, will be unreferenced.
68 * Both 'ptr' and 'reference' may be NULL.
69 * \return TRUE if the object's refcount hits zero and should be destroyed.
70 */
71static INLINE boolean
72pipe_reference_described(struct pipe_reference *ptr,
73                         struct pipe_reference *reference,
74                         debug_reference_descriptor get_desc)
75{
76   boolean destroy = FALSE;
77
78   if(ptr != reference) {
79      /* bump the reference.count first */
80      if (reference) {
81         assert(pipe_is_referenced(reference));
82         p_atomic_inc(&reference->count);
83         debug_reference(reference, get_desc, 1);
84      }
85
86      if (ptr) {
87         assert(pipe_is_referenced(ptr));
88         if (p_atomic_dec_zero(&ptr->count)) {
89            destroy = TRUE;
90         }
91         debug_reference(ptr, get_desc, -1);
92      }
93   }
94
95   return destroy;
96}
97
98static INLINE boolean
99pipe_reference(struct pipe_reference *ptr, struct pipe_reference *reference)
100{
101   return pipe_reference_described(ptr, reference,
102                                   (debug_reference_descriptor)debug_describe_reference);
103}
104
105static INLINE void
106pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
107{
108   struct pipe_surface *old_surf = *ptr;
109
110   if (pipe_reference_described(&(*ptr)->reference, &surf->reference,
111                                (debug_reference_descriptor)debug_describe_surface))
112      old_surf->context->surface_destroy(old_surf->context, old_surf);
113   *ptr = surf;
114}
115
116static INLINE void
117pipe_resource_reference(struct pipe_resource **ptr, struct pipe_resource *tex)
118{
119   struct pipe_resource *old_tex = *ptr;
120
121   if (pipe_reference_described(&(*ptr)->reference, &tex->reference,
122                                (debug_reference_descriptor)debug_describe_resource))
123      old_tex->screen->resource_destroy(old_tex->screen, old_tex);
124   *ptr = tex;
125}
126
127static INLINE void
128pipe_sampler_view_reference(struct pipe_sampler_view **ptr, struct pipe_sampler_view *view)
129{
130   struct pipe_sampler_view *old_view = *ptr;
131
132   if (pipe_reference_described(&(*ptr)->reference, &view->reference,
133                                (debug_reference_descriptor)debug_describe_sampler_view))
134      old_view->context->sampler_view_destroy(old_view->context, old_view);
135   *ptr = view;
136}
137
138/**
139 * Similar to pipe_sampler_view_reference() but always set the pointer to
140 * NULL and pass in an explicit context.  Passing an explicit context is a
141 * work-around for fixing a dangling context pointer problem when textures
142 * are shared by multiple contexts.  XXX fix this someday.
143 */
144static INLINE void
145pipe_sampler_view_release(struct pipe_context *ctx,
146                          struct pipe_sampler_view **ptr)
147{
148   struct pipe_sampler_view *old_view = *ptr;
149   if (*ptr && (*ptr)->context != ctx) {
150      debug_printf_once(("context mis-match in pipe_sampler_view_release()\n"));
151   }
152   if (pipe_reference_described(&(*ptr)->reference, NULL,
153                    (debug_reference_descriptor)debug_describe_sampler_view)) {
154      ctx->sampler_view_destroy(ctx, old_view);
155   }
156   *ptr = NULL;
157}
158
159
160static INLINE void
161pipe_so_target_reference(struct pipe_stream_output_target **ptr,
162                         struct pipe_stream_output_target *target)
163{
164   struct pipe_stream_output_target *old = *ptr;
165
166   if (pipe_reference_described(&(*ptr)->reference, &target->reference,
167                     (debug_reference_descriptor)debug_describe_so_target))
168      old->context->stream_output_target_destroy(old->context, old);
169   *ptr = target;
170}
171
172static INLINE void
173pipe_surface_reset(struct pipe_context *ctx, struct pipe_surface* ps,
174                   struct pipe_resource *pt, unsigned level, unsigned layer,
175                   unsigned flags)
176{
177   pipe_resource_reference(&ps->texture, pt);
178   ps->format = pt->format;
179   ps->width = u_minify(pt->width0, level);
180   ps->height = u_minify(pt->height0, level);
181   ps->usage = flags;
182   ps->u.tex.level = level;
183   ps->u.tex.first_layer = ps->u.tex.last_layer = layer;
184   ps->context = ctx;
185}
186
187static INLINE void
188pipe_surface_init(struct pipe_context *ctx, struct pipe_surface* ps,
189                  struct pipe_resource *pt, unsigned level, unsigned layer,
190                  unsigned flags)
191{
192   ps->texture = 0;
193   pipe_reference_init(&ps->reference, 1);
194   pipe_surface_reset(ctx, ps, pt, level, layer, flags);
195}
196
197/* Return true if the surfaces are equal. */
198static INLINE boolean
199pipe_surface_equal(struct pipe_surface *s1, struct pipe_surface *s2)
200{
201   return s1->texture == s2->texture &&
202          s1->format == s2->format &&
203          (s1->texture->target != PIPE_BUFFER ||
204           (s1->u.buf.first_element == s2->u.buf.first_element &&
205            s1->u.buf.last_element == s2->u.buf.last_element)) &&
206          (s1->texture->target == PIPE_BUFFER ||
207           (s1->u.tex.level == s2->u.tex.level &&
208            s1->u.tex.first_layer == s2->u.tex.first_layer &&
209            s1->u.tex.last_layer == s2->u.tex.last_layer));
210}
211
212/*
213 * Convenience wrappers for screen buffer functions.
214 */
215
216static INLINE struct pipe_resource *
217pipe_buffer_create( struct pipe_screen *screen,
218		    unsigned bind,
219		    unsigned usage,
220		    unsigned size )
221{
222   struct pipe_resource buffer;
223   memset(&buffer, 0, sizeof buffer);
224   buffer.target = PIPE_BUFFER;
225   buffer.format = PIPE_FORMAT_R8_UNORM; /* want TYPELESS or similar */
226   buffer.bind = bind;
227   buffer.usage = usage;
228   buffer.flags = 0;
229   buffer.width0 = size;
230   buffer.height0 = 1;
231   buffer.depth0 = 1;
232   buffer.array_size = 1;
233   return screen->resource_create(screen, &buffer);
234}
235
236
237static INLINE struct pipe_resource *
238pipe_user_buffer_create( struct pipe_screen *screen, void *ptr, unsigned size,
239			 unsigned usage )
240{
241   return screen->user_buffer_create(screen, ptr, size, usage);
242}
243
244static INLINE void *
245pipe_buffer_map_range(struct pipe_context *pipe,
246		      struct pipe_resource *buffer,
247		      unsigned offset,
248		      unsigned length,
249		      unsigned usage,
250		      struct pipe_transfer **transfer)
251{
252   struct pipe_box box;
253   void *map;
254
255   assert(offset < buffer->width0);
256   assert(offset + length <= buffer->width0);
257   assert(length);
258
259   u_box_1d(offset, length, &box);
260
261   *transfer = pipe->get_transfer( pipe,
262                                   buffer,
263                                   0,
264                                   usage,
265                                   &box);
266
267   if (*transfer == NULL)
268      return NULL;
269
270   map = pipe->transfer_map( pipe, *transfer );
271   if (map == NULL) {
272      pipe->transfer_destroy( pipe, *transfer );
273      *transfer = NULL;
274      return NULL;
275   }
276
277   return map;
278}
279
280
281static INLINE void *
282pipe_buffer_map(struct pipe_context *pipe,
283                struct pipe_resource *buffer,
284                unsigned usage,
285                struct pipe_transfer **transfer)
286{
287   return pipe_buffer_map_range(pipe, buffer, 0, buffer->width0, usage, transfer);
288}
289
290
291static INLINE void
292pipe_buffer_unmap(struct pipe_context *pipe,
293                  struct pipe_transfer *transfer)
294{
295   if (transfer) {
296      pipe->transfer_unmap(pipe, transfer);
297      pipe->transfer_destroy(pipe, transfer);
298   }
299}
300
301static INLINE void
302pipe_buffer_flush_mapped_range(struct pipe_context *pipe,
303                               struct pipe_transfer *transfer,
304                               unsigned offset,
305                               unsigned length)
306{
307   struct pipe_box box;
308   int transfer_offset;
309
310   assert(length);
311   assert(transfer->box.x <= offset);
312   assert(offset + length <= transfer->box.x + transfer->box.width);
313
314   /* Match old screen->buffer_flush_mapped_range() behaviour, where
315    * offset parameter is relative to the start of the buffer, not the
316    * mapped range.
317    */
318   transfer_offset = offset - transfer->box.x;
319
320   u_box_1d(transfer_offset, length, &box);
321
322   pipe->transfer_flush_region(pipe, transfer, &box);
323}
324
325static INLINE void
326pipe_buffer_write(struct pipe_context *pipe,
327                  struct pipe_resource *buf,
328                  unsigned offset,
329                  unsigned size,
330                  const void *data)
331{
332   struct pipe_box box;
333   unsigned usage = PIPE_TRANSFER_WRITE;
334
335   if (offset == 0 && size == buf->width0) {
336      usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
337   } else {
338      usage |= PIPE_TRANSFER_DISCARD_RANGE;
339   }
340
341   u_box_1d(offset, size, &box);
342
343   pipe->transfer_inline_write( pipe,
344                                buf,
345                                0,
346                                usage,
347                                &box,
348                                data,
349                                size,
350                                0);
351}
352
353/**
354 * Special case for writing non-overlapping ranges.
355 *
356 * We can avoid GPU/CPU synchronization when writing range that has never
357 * been written before.
358 */
359static INLINE void
360pipe_buffer_write_nooverlap(struct pipe_context *pipe,
361                            struct pipe_resource *buf,
362                            unsigned offset, unsigned size,
363                            const void *data)
364{
365   struct pipe_box box;
366
367   u_box_1d(offset, size, &box);
368
369   pipe->transfer_inline_write(pipe,
370                               buf,
371                               0,
372                               (PIPE_TRANSFER_WRITE |
373                                PIPE_TRANSFER_UNSYNCHRONIZED),
374                               &box,
375                               data,
376                               0, 0);
377}
378
379static INLINE void
380pipe_buffer_read(struct pipe_context *pipe,
381                 struct pipe_resource *buf,
382                 unsigned offset,
383                 unsigned size,
384                 void *data)
385{
386   struct pipe_transfer *src_transfer;
387   ubyte *map;
388
389   map = (ubyte *) pipe_buffer_map_range(pipe,
390					 buf,
391					 offset, size,
392					 PIPE_TRANSFER_READ,
393					 &src_transfer);
394
395   if (map)
396      memcpy(data, map, size);
397
398   pipe_buffer_unmap(pipe, src_transfer);
399}
400
401static INLINE struct pipe_transfer *
402pipe_get_transfer( struct pipe_context *context,
403                   struct pipe_resource *resource,
404                   unsigned level, unsigned layer,
405                   enum pipe_transfer_usage usage,
406                   unsigned x, unsigned y,
407                   unsigned w, unsigned h)
408{
409   struct pipe_box box;
410   u_box_2d_zslice( x, y, layer, w, h, &box );
411   return context->get_transfer( context,
412                                 resource,
413                                 level,
414                                 usage,
415                                 &box );
416}
417
418static INLINE void *
419pipe_transfer_map( struct pipe_context *context,
420                   struct pipe_transfer *transfer )
421{
422   return context->transfer_map( context, transfer );
423}
424
425static INLINE void
426pipe_transfer_unmap( struct pipe_context *context,
427                     struct pipe_transfer *transfer )
428{
429   context->transfer_unmap( context, transfer );
430}
431
432
433static INLINE void
434pipe_transfer_destroy( struct pipe_context *context,
435                       struct pipe_transfer *transfer )
436{
437   context->transfer_destroy(context, transfer);
438}
439
440static INLINE void
441pipe_set_constant_buffer(struct pipe_context *pipe, uint shader, uint index,
442                         struct pipe_resource *buf)
443{
444   if (buf) {
445      struct pipe_constant_buffer cb;
446      cb.buffer = buf;
447      cb.buffer_offset = 0;
448      cb.buffer_size = buf->width0;
449      pipe->set_constant_buffer(pipe, shader, index, &cb);
450   } else {
451      pipe->set_constant_buffer(pipe, shader, index, NULL);
452   }
453}
454
455
456static INLINE boolean util_get_offset(
457   const struct pipe_rasterizer_state *templ,
458   unsigned fill_mode)
459{
460   switch(fill_mode) {
461   case PIPE_POLYGON_MODE_POINT:
462      return templ->offset_point;
463   case PIPE_POLYGON_MODE_LINE:
464      return templ->offset_line;
465   case PIPE_POLYGON_MODE_FILL:
466      return templ->offset_tri;
467   default:
468      assert(0);
469      return FALSE;
470   }
471}
472
473/**
474 * This function is used to copy an array of pipe_vertex_buffer structures,
475 * while properly referencing the pipe_vertex_buffer::buffer member.
476 *
477 * \sa util_copy_framebuffer_state
478 */
479static INLINE void util_copy_vertex_buffers(struct pipe_vertex_buffer *dst,
480                                            unsigned *dst_count,
481                                            const struct pipe_vertex_buffer *src,
482                                            unsigned src_count)
483{
484   unsigned i;
485
486   /* Reference the buffers of 'src' in 'dst'. */
487   for (i = 0; i < src_count; i++) {
488      pipe_resource_reference(&dst[i].buffer, src[i].buffer);
489   }
490   /* Unreference the rest of the buffers in 'dst'. */
491   for (; i < *dst_count; i++) {
492      pipe_resource_reference(&dst[i].buffer, NULL);
493   }
494
495   /* Update the size of 'dst' and copy over the other members
496    * of pipe_vertex_buffer. */
497   *dst_count = src_count;
498   memcpy(dst, src, src_count * sizeof(struct pipe_vertex_buffer));
499}
500
501static INLINE float
502util_get_min_point_size(const struct pipe_rasterizer_state *state)
503{
504   /* The point size should be clamped to this value at the rasterizer stage.
505    */
506   return state->gl_rasterization_rules &&
507          !state->point_quad_rasterization &&
508          !state->point_smooth &&
509          !state->multisample ? 1.0f : 0.0f;
510}
511
512static INLINE void
513util_query_clear_result(union pipe_query_result *result, unsigned type)
514{
515   switch (type) {
516   case PIPE_QUERY_OCCLUSION_PREDICATE:
517   case PIPE_QUERY_SO_OVERFLOW_PREDICATE:
518   case PIPE_QUERY_GPU_FINISHED:
519      result->b = FALSE;
520      break;
521   case PIPE_QUERY_OCCLUSION_COUNTER:
522   case PIPE_QUERY_TIMESTAMP:
523   case PIPE_QUERY_TIME_ELAPSED:
524   case PIPE_QUERY_PRIMITIVES_GENERATED:
525   case PIPE_QUERY_PRIMITIVES_EMITTED:
526      result->u64 = 0;
527      break;
528   case PIPE_QUERY_SO_STATISTICS:
529      memset(&result->so_statistics, 0, sizeof(result->so_statistics));
530      break;
531   case PIPE_QUERY_TIMESTAMP_DISJOINT:
532      memset(&result->timestamp_disjoint, 0, sizeof(result->timestamp_disjoint));
533      break;
534   case PIPE_QUERY_PIPELINE_STATISTICS:
535      memset(&result->pipeline_statistics, 0, sizeof(result->pipeline_statistics));
536      break;
537   default:
538      assert(0);
539   }
540}
541
542#ifdef __cplusplus
543}
544#endif
545
546#endif /* U_INLINES_H */
547