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1 /*
2  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * on the rights to use, copy, modify, merge, publish, distribute, sub
8  * license, and/or sell copies of the Software, and to permit persons to whom
9  * the Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
22 
23 #include "r300_context.h"
24 #include "r300_emit.h"
25 #include "r300_texture.h"
26 #include "r300_reg.h"
27 
28 #include "util/u_format.h"
29 #include "util/u_half.h"
30 #include "util/u_pack_color.h"
31 #include "util/u_surface.h"
32 
33 enum r300_blitter_op /* bitmask */
34 {
35     R300_STOP_QUERY         = 1,
36     R300_SAVE_TEXTURES      = 2,
37     R300_SAVE_FRAMEBUFFER   = 4,
38     R300_IGNORE_RENDER_COND = 8,
39 
40     R300_CLEAR         = R300_STOP_QUERY,
41 
42     R300_CLEAR_SURFACE = R300_STOP_QUERY | R300_SAVE_FRAMEBUFFER,
43 
44     R300_COPY          = R300_STOP_QUERY | R300_SAVE_FRAMEBUFFER |
45                          R300_SAVE_TEXTURES | R300_IGNORE_RENDER_COND,
46 
47     R300_BLIT          = R300_STOP_QUERY | R300_SAVE_FRAMEBUFFER |
48                          R300_SAVE_TEXTURES,
49 
50     R300_DECOMPRESS    = R300_STOP_QUERY | R300_IGNORE_RENDER_COND,
51 };
52 
r300_blitter_begin(struct r300_context * r300,enum r300_blitter_op op)53 static void r300_blitter_begin(struct r300_context* r300, enum r300_blitter_op op)
54 {
55     if ((op & R300_STOP_QUERY) && r300->query_current) {
56         r300->blitter_saved_query = r300->query_current;
57         r300_stop_query(r300);
58     }
59 
60     /* Yeah we have to save all those states to ensure the blitter operation
61      * is really transparent. The states will be restored by the blitter once
62      * copying is done. */
63     util_blitter_save_blend(r300->blitter, r300->blend_state.state);
64     util_blitter_save_depth_stencil_alpha(r300->blitter, r300->dsa_state.state);
65     util_blitter_save_stencil_ref(r300->blitter, &(r300->stencil_ref));
66     util_blitter_save_rasterizer(r300->blitter, r300->rs_state.state);
67     util_blitter_save_fragment_shader(r300->blitter, r300->fs.state);
68     util_blitter_save_vertex_shader(r300->blitter, r300->vs_state.state);
69     util_blitter_save_viewport(r300->blitter, &r300->viewport);
70     util_blitter_save_scissor(r300->blitter, r300->scissor_state.state);
71     util_blitter_save_sample_mask(r300->blitter, *(unsigned*)r300->sample_mask.state);
72     util_blitter_save_vertex_buffer_slot(r300->blitter, r300->vertex_buffer);
73     util_blitter_save_vertex_elements(r300->blitter, r300->velems);
74 
75     if (op & R300_SAVE_FRAMEBUFFER) {
76         util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
77     }
78 
79     if (op & R300_SAVE_TEXTURES) {
80         struct r300_textures_state* state =
81             (struct r300_textures_state*)r300->textures_state.state;
82 
83         util_blitter_save_fragment_sampler_states(
84             r300->blitter, state->sampler_state_count,
85             (void**)state->sampler_states);
86 
87         util_blitter_save_fragment_sampler_views(
88             r300->blitter, state->sampler_view_count,
89             (struct pipe_sampler_view**)state->sampler_views);
90     }
91 
92     if (op & R300_IGNORE_RENDER_COND) {
93         /* Save the flag. */
94         r300->blitter_saved_skip_rendering = r300->skip_rendering+1;
95         r300->skip_rendering = FALSE;
96     } else {
97         r300->blitter_saved_skip_rendering = 0;
98     }
99 }
100 
r300_blitter_end(struct r300_context * r300)101 static void r300_blitter_end(struct r300_context *r300)
102 {
103     if (r300->blitter_saved_query) {
104         r300_resume_query(r300, r300->blitter_saved_query);
105         r300->blitter_saved_query = NULL;
106     }
107 
108     if (r300->blitter_saved_skip_rendering) {
109         /* Restore the flag. */
110         r300->skip_rendering = r300->blitter_saved_skip_rendering-1;
111     }
112 }
113 
r300_depth_clear_cb_value(enum pipe_format format,const float * rgba)114 static uint32_t r300_depth_clear_cb_value(enum pipe_format format,
115                                           const float* rgba)
116 {
117     union util_color uc;
118     util_pack_color(rgba, format, &uc);
119 
120     if (util_format_get_blocksizebits(format) == 32)
121         return uc.ui[0];
122     else
123         return uc.us | (uc.us << 16);
124 }
125 
r300_cbzb_clear_allowed(struct r300_context * r300,unsigned clear_buffers)126 static boolean r300_cbzb_clear_allowed(struct r300_context *r300,
127                                        unsigned clear_buffers)
128 {
129     struct pipe_framebuffer_state *fb =
130         (struct pipe_framebuffer_state*)r300->fb_state.state;
131 
132     /* Only color clear allowed, and only one colorbuffer. */
133     if ((clear_buffers & ~PIPE_CLEAR_COLOR) != 0 || fb->nr_cbufs != 1 || !fb->cbufs[0])
134         return FALSE;
135 
136     return r300_surface(fb->cbufs[0])->cbzb_allowed;
137 }
138 
r300_fast_zclear_allowed(struct r300_context * r300,unsigned clear_buffers)139 static boolean r300_fast_zclear_allowed(struct r300_context *r300,
140                                         unsigned clear_buffers)
141 {
142     struct pipe_framebuffer_state *fb =
143         (struct pipe_framebuffer_state*)r300->fb_state.state;
144 
145     return r300_resource(fb->zsbuf->texture)->tex.zmask_dwords[fb->zsbuf->u.tex.level] != 0;
146 }
147 
r300_hiz_clear_allowed(struct r300_context * r300)148 static boolean r300_hiz_clear_allowed(struct r300_context *r300)
149 {
150     struct pipe_framebuffer_state *fb =
151         (struct pipe_framebuffer_state*)r300->fb_state.state;
152 
153     return r300_resource(fb->zsbuf->texture)->tex.hiz_dwords[fb->zsbuf->u.tex.level] != 0;
154 }
155 
r300_depth_clear_value(enum pipe_format format,double depth,unsigned stencil)156 static uint32_t r300_depth_clear_value(enum pipe_format format,
157                                        double depth, unsigned stencil)
158 {
159     switch (format) {
160         case PIPE_FORMAT_Z16_UNORM:
161         case PIPE_FORMAT_X8Z24_UNORM:
162             return util_pack_z(format, depth);
163 
164         case PIPE_FORMAT_S8_UINT_Z24_UNORM:
165             return util_pack_z_stencil(format, depth, stencil);
166 
167         default:
168             assert(0);
169             return 0;
170     }
171 }
172 
r300_hiz_clear_value(double depth)173 static uint32_t r300_hiz_clear_value(double depth)
174 {
175     uint32_t r = (uint32_t)(CLAMP(depth, 0, 1) * 255.5);
176     assert(r <= 255);
177     return r | (r << 8) | (r << 16) | (r << 24);
178 }
179 
r300_set_clear_color(struct r300_context * r300,const union pipe_color_union * color)180 static void r300_set_clear_color(struct r300_context *r300,
181                                  const union pipe_color_union *color)
182 {
183     struct pipe_framebuffer_state *fb =
184         (struct pipe_framebuffer_state*)r300->fb_state.state;
185     union util_color uc;
186 
187     memset(&uc, 0, sizeof(uc));
188     util_pack_color(color->f, fb->cbufs[0]->format, &uc);
189 
190     if (fb->cbufs[0]->format == PIPE_FORMAT_R16G16B16A16_FLOAT ||
191         fb->cbufs[0]->format == PIPE_FORMAT_R16G16B16X16_FLOAT) {
192         /* (0,1,2,3) maps to (B,G,R,A) */
193         r300->color_clear_value_gb = uc.h[0] | ((uint32_t)uc.h[1] << 16);
194         r300->color_clear_value_ar = uc.h[2] | ((uint32_t)uc.h[3] << 16);
195     } else {
196         r300->color_clear_value = uc.ui[0];
197     }
198 }
199 
200 DEBUG_GET_ONCE_BOOL_OPTION(hyperz, "RADEON_HYPERZ", FALSE)
201 
202 /* Clear currently bound buffers. */
r300_clear(struct pipe_context * pipe,unsigned buffers,const union pipe_color_union * color,double depth,unsigned stencil)203 static void r300_clear(struct pipe_context* pipe,
204                        unsigned buffers,
205                        const union pipe_color_union *color,
206                        double depth,
207                        unsigned stencil)
208 {
209     /* My notes about Zbuffer compression:
210      *
211      * 1) The zbuffer must be micro-tiled and whole microtiles must be
212      *    written if compression is enabled. If microtiling is disabled,
213      *    it locks up.
214      *
215      * 2) There is ZMASK RAM which contains a compressed zbuffer.
216      *    Each dword of the Z Mask contains compression information
217      *    for 16 4x4 pixel tiles, that is 2 bits for each tile.
218      *    On chips with 2 Z pipes, every other dword maps to a different
219      *    pipe. On newer chipsets, there is a new compression mode
220      *    with 8x8 pixel tiles per 2 bits.
221      *
222      * 3) The FASTFILL bit has nothing to do with filling. It only tells hw
223      *    it should look in the ZMASK RAM first before fetching from a real
224      *    zbuffer.
225      *
226      * 4) If a pixel is in a cleared state, ZB_DEPTHCLEARVALUE is returned
227      *    during zbuffer reads instead of the value that is actually stored
228      *    in the zbuffer memory. A pixel is in a cleared state when its ZMASK
229      *    is equal to 0. Therefore, if you clear ZMASK with zeros, you may
230      *    leave the zbuffer memory uninitialized, but then you must enable
231      *    compression, so that the ZMASK RAM is actually used.
232      *
233      * 5) Each 4x4 (or 8x8) tile is automatically decompressed and recompressed
234      *    during zbuffer updates. A special decompressing operation should be
235      *    used to fully decompress a zbuffer, which basically just stores all
236      *    compressed tiles in ZMASK to the zbuffer memory.
237      *
238      * 6) For a 16-bit zbuffer, compression causes a hung with one or
239      *    two samples and should not be used.
240      *
241      * 7) FORCE_COMPRESSED_STENCIL_VALUE should be enabled for stencil clears
242      *    to avoid needless decompression.
243      *
244      * 8) Fastfill must not be used if reading of compressed Z data is disabled
245      *    and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
246      *    i.e. it cannot be used to compress the zbuffer.
247      *
248      * 9) ZB_CB_CLEAR does not interact with zbuffer compression in any way.
249      *
250      * - Marek
251      */
252 
253     struct r300_context* r300 = r300_context(pipe);
254     struct pipe_framebuffer_state *fb =
255         (struct pipe_framebuffer_state*)r300->fb_state.state;
256     struct r300_hyperz_state *hyperz =
257         (struct r300_hyperz_state*)r300->hyperz_state.state;
258     uint32_t width = fb->width;
259     uint32_t height = fb->height;
260     uint32_t hyperz_dcv = hyperz->zb_depthclearvalue;
261 
262     /* Use fast Z clear.
263      * The zbuffer must be in micro-tiled mode, otherwise it locks up. */
264     if (buffers & PIPE_CLEAR_DEPTHSTENCIL) {
265         boolean zmask_clear, hiz_clear;
266 
267         /* If both depth and stencil are present, they must be cleared together. */
268         if (fb->zsbuf->texture->format == PIPE_FORMAT_S8_UINT_Z24_UNORM &&
269             (buffers & PIPE_CLEAR_DEPTHSTENCIL) != PIPE_CLEAR_DEPTHSTENCIL) {
270             zmask_clear = FALSE;
271             hiz_clear = FALSE;
272         } else {
273             zmask_clear = r300_fast_zclear_allowed(r300, buffers);
274             hiz_clear = r300_hiz_clear_allowed(r300);
275         }
276 
277         /* If we need Hyper-Z. */
278         if (zmask_clear || hiz_clear) {
279             /* Try to obtain the access to Hyper-Z buffers if we don't have one. */
280             if (!r300->hyperz_enabled &&
281                 (r300->screen->caps.is_r500 || debug_get_option_hyperz())) {
282                 r300->hyperz_enabled =
283                     r300->rws->cs_request_feature(r300->cs,
284                                                 RADEON_FID_R300_HYPERZ_ACCESS,
285                                                 TRUE);
286                 if (r300->hyperz_enabled) {
287                    /* Need to emit HyperZ buffer regs for the first time. */
288                    r300_mark_fb_state_dirty(r300, R300_CHANGED_HYPERZ_FLAG);
289                 }
290             }
291 
292             /* Setup Hyper-Z clears. */
293             if (r300->hyperz_enabled) {
294                 if (zmask_clear) {
295                     hyperz_dcv = hyperz->zb_depthclearvalue =
296                         r300_depth_clear_value(fb->zsbuf->format, depth, stencil);
297 
298                     r300_mark_atom_dirty(r300, &r300->zmask_clear);
299                     r300_mark_atom_dirty(r300, &r300->gpu_flush);
300                     buffers &= ~PIPE_CLEAR_DEPTHSTENCIL;
301                 }
302 
303                 if (hiz_clear) {
304                     r300->hiz_clear_value = r300_hiz_clear_value(depth);
305                     r300_mark_atom_dirty(r300, &r300->hiz_clear);
306                     r300_mark_atom_dirty(r300, &r300->gpu_flush);
307                 }
308                 r300->num_z_clears++;
309             }
310         }
311     }
312 
313     /* Use fast color clear for an AA colorbuffer.
314      * The CMASK is shared between all colorbuffers, so we use it
315      * if there is only one colorbuffer bound. */
316     if ((buffers & PIPE_CLEAR_COLOR) && fb->nr_cbufs == 1 && fb->cbufs[0] &&
317         r300_resource(fb->cbufs[0]->texture)->tex.cmask_dwords) {
318         /* Try to obtain the access to the CMASK if we don't have one. */
319         if (!r300->cmask_access) {
320             r300->cmask_access =
321                 r300->rws->cs_request_feature(r300->cs,
322                                               RADEON_FID_R300_CMASK_ACCESS,
323                                               TRUE);
324         }
325 
326         /* Setup the clear. */
327         if (r300->cmask_access) {
328             /* Pair the resource with the CMASK to avoid other resources
329              * accessing it. */
330             if (!r300->screen->cmask_resource) {
331                 mtx_lock(&r300->screen->cmask_mutex);
332                 /* Double checking (first unlocked, then locked). */
333                 if (!r300->screen->cmask_resource) {
334                     /* Don't reference this, so that the texture can be
335                      * destroyed while set in cmask_resource.
336                      * Then in texture_destroy, we set cmask_resource to NULL. */
337                     r300->screen->cmask_resource = fb->cbufs[0]->texture;
338                 }
339                 mtx_unlock(&r300->screen->cmask_mutex);
340             }
341 
342             if (r300->screen->cmask_resource == fb->cbufs[0]->texture) {
343                 r300_set_clear_color(r300, color);
344                 r300_mark_atom_dirty(r300, &r300->cmask_clear);
345                 r300_mark_atom_dirty(r300, &r300->gpu_flush);
346                 buffers &= ~PIPE_CLEAR_COLOR;
347             }
348         }
349     }
350     /* Enable CBZB clear. */
351     else if (r300_cbzb_clear_allowed(r300, buffers)) {
352         struct r300_surface *surf = r300_surface(fb->cbufs[0]);
353 
354         hyperz->zb_depthclearvalue =
355                 r300_depth_clear_cb_value(surf->base.format, color->f);
356 
357         width = surf->cbzb_width;
358         height = surf->cbzb_height;
359 
360         r300->cbzb_clear = TRUE;
361         r300_mark_fb_state_dirty(r300, R300_CHANGED_HYPERZ_FLAG);
362     }
363 
364     /* Clear. */
365     if (buffers) {
366         /* Clear using the blitter. */
367         r300_blitter_begin(r300, R300_CLEAR);
368         util_blitter_clear(r300->blitter, width, height, 1,
369                            buffers, color, depth, stencil);
370         r300_blitter_end(r300);
371     } else if (r300->zmask_clear.dirty ||
372                r300->hiz_clear.dirty ||
373                r300->cmask_clear.dirty) {
374         /* Just clear zmask and hiz now, this does not use the standard draw
375          * procedure. */
376         /* Calculate zmask_clear and hiz_clear atom sizes. */
377         unsigned dwords =
378             r300->gpu_flush.size +
379             (r300->zmask_clear.dirty ? r300->zmask_clear.size : 0) +
380             (r300->hiz_clear.dirty ? r300->hiz_clear.size : 0) +
381             (r300->cmask_clear.dirty ? r300->cmask_clear.size : 0) +
382             r300_get_num_cs_end_dwords(r300);
383 
384         /* Reserve CS space. */
385         if (!r300->rws->cs_check_space(r300->cs, dwords)) {
386             r300_flush(&r300->context, PIPE_FLUSH_ASYNC, NULL);
387         }
388 
389         /* Emit clear packets. */
390         r300_emit_gpu_flush(r300, r300->gpu_flush.size, r300->gpu_flush.state);
391         r300->gpu_flush.dirty = FALSE;
392 
393         if (r300->zmask_clear.dirty) {
394             r300_emit_zmask_clear(r300, r300->zmask_clear.size,
395                                   r300->zmask_clear.state);
396             r300->zmask_clear.dirty = FALSE;
397         }
398         if (r300->hiz_clear.dirty) {
399             r300_emit_hiz_clear(r300, r300->hiz_clear.size,
400                                 r300->hiz_clear.state);
401             r300->hiz_clear.dirty = FALSE;
402         }
403         if (r300->cmask_clear.dirty) {
404             r300_emit_cmask_clear(r300, r300->cmask_clear.size,
405                                   r300->cmask_clear.state);
406             r300->cmask_clear.dirty = FALSE;
407         }
408     } else {
409         assert(0);
410     }
411 
412     /* Disable CBZB clear. */
413     if (r300->cbzb_clear) {
414         r300->cbzb_clear = FALSE;
415         hyperz->zb_depthclearvalue = hyperz_dcv;
416         r300_mark_fb_state_dirty(r300, R300_CHANGED_HYPERZ_FLAG);
417     }
418 
419     /* Enable fastfill and/or hiz.
420      *
421      * If we cleared zmask/hiz, it's in use now. The Hyper-Z state update
422      * looks if zmask/hiz is in use and programs hardware accordingly. */
423     if (r300->zmask_in_use || r300->hiz_in_use) {
424         r300_mark_atom_dirty(r300, &r300->hyperz_state);
425     }
426 }
427 
428 /* Clear a region of a color surface to a constant value. */
r300_clear_render_target(struct pipe_context * pipe,struct pipe_surface * dst,const union pipe_color_union * color,unsigned dstx,unsigned dsty,unsigned width,unsigned height,bool render_condition_enabled)429 static void r300_clear_render_target(struct pipe_context *pipe,
430                                      struct pipe_surface *dst,
431                                      const union pipe_color_union *color,
432                                      unsigned dstx, unsigned dsty,
433                                      unsigned width, unsigned height,
434                                      bool render_condition_enabled)
435 {
436     struct r300_context *r300 = r300_context(pipe);
437 
438     r300_blitter_begin(r300, R300_CLEAR_SURFACE |
439                        (render_condition_enabled ? 0 : R300_IGNORE_RENDER_COND));
440     util_blitter_clear_render_target(r300->blitter, dst, color,
441                                      dstx, dsty, width, height);
442     r300_blitter_end(r300);
443 }
444 
445 /* Clear a region of a depth stencil surface. */
r300_clear_depth_stencil(struct pipe_context * pipe,struct pipe_surface * dst,unsigned clear_flags,double depth,unsigned stencil,unsigned dstx,unsigned dsty,unsigned width,unsigned height,bool render_condition_enabled)446 static void r300_clear_depth_stencil(struct pipe_context *pipe,
447                                      struct pipe_surface *dst,
448                                      unsigned clear_flags,
449                                      double depth,
450                                      unsigned stencil,
451                                      unsigned dstx, unsigned dsty,
452                                      unsigned width, unsigned height,
453                                      bool render_condition_enabled)
454 {
455     struct r300_context *r300 = r300_context(pipe);
456     struct pipe_framebuffer_state *fb =
457         (struct pipe_framebuffer_state*)r300->fb_state.state;
458 
459     if (r300->zmask_in_use && !r300->locked_zbuffer) {
460         if (fb->zsbuf->texture == dst->texture) {
461             r300_decompress_zmask(r300);
462         }
463     }
464 
465     /* XXX Do not decompress ZMask of the currently-set zbuffer. */
466     r300_blitter_begin(r300, R300_CLEAR_SURFACE |
467                        (render_condition_enabled ? 0 : R300_IGNORE_RENDER_COND));
468     util_blitter_clear_depth_stencil(r300->blitter, dst, clear_flags, depth, stencil,
469                                      dstx, dsty, width, height);
470     r300_blitter_end(r300);
471 }
472 
r300_decompress_zmask(struct r300_context * r300)473 void r300_decompress_zmask(struct r300_context *r300)
474 {
475     struct pipe_framebuffer_state *fb =
476         (struct pipe_framebuffer_state*)r300->fb_state.state;
477 
478     if (!r300->zmask_in_use || r300->locked_zbuffer)
479         return;
480 
481     r300->zmask_decompress = TRUE;
482     r300_mark_atom_dirty(r300, &r300->hyperz_state);
483 
484     r300_blitter_begin(r300, R300_DECOMPRESS);
485     util_blitter_custom_clear_depth(r300->blitter, fb->width, fb->height, 0,
486                                     r300->dsa_decompress_zmask);
487     r300_blitter_end(r300);
488 
489     r300->zmask_decompress = FALSE;
490     r300->zmask_in_use = FALSE;
491     r300_mark_atom_dirty(r300, &r300->hyperz_state);
492 }
493 
r300_decompress_zmask_locked_unsafe(struct r300_context * r300)494 void r300_decompress_zmask_locked_unsafe(struct r300_context *r300)
495 {
496     struct pipe_framebuffer_state fb;
497 
498     memset(&fb, 0, sizeof(fb));
499     fb.width = r300->locked_zbuffer->width;
500     fb.height = r300->locked_zbuffer->height;
501     fb.zsbuf = r300->locked_zbuffer;
502 
503     r300->context.set_framebuffer_state(&r300->context, &fb);
504     r300_decompress_zmask(r300);
505 }
506 
r300_decompress_zmask_locked(struct r300_context * r300)507 void r300_decompress_zmask_locked(struct r300_context *r300)
508 {
509     struct pipe_framebuffer_state saved_fb;
510 
511     memset(&saved_fb, 0, sizeof(saved_fb));
512     util_copy_framebuffer_state(&saved_fb, r300->fb_state.state);
513     r300_decompress_zmask_locked_unsafe(r300);
514     r300->context.set_framebuffer_state(&r300->context, &saved_fb);
515     util_unreference_framebuffer_state(&saved_fb);
516 
517     pipe_surface_reference(&r300->locked_zbuffer, NULL);
518 }
519 
r300_is_blit_supported(enum pipe_format format)520 bool r300_is_blit_supported(enum pipe_format format)
521 {
522     const struct util_format_description *desc =
523         util_format_description(format);
524 
525     return desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ||
526            desc->layout == UTIL_FORMAT_LAYOUT_S3TC ||
527            desc->layout == UTIL_FORMAT_LAYOUT_RGTC;
528 }
529 
530 /* Copy a block of pixels from one surface to another. */
r300_resource_copy_region(struct pipe_context * pipe,struct pipe_resource * dst,unsigned dst_level,unsigned dstx,unsigned dsty,unsigned dstz,struct pipe_resource * src,unsigned src_level,const struct pipe_box * src_box)531 static void r300_resource_copy_region(struct pipe_context *pipe,
532                                       struct pipe_resource *dst,
533                                       unsigned dst_level,
534                                       unsigned dstx, unsigned dsty, unsigned dstz,
535                                       struct pipe_resource *src,
536                                       unsigned src_level,
537                                       const struct pipe_box *src_box)
538 {
539     struct pipe_screen *screen = pipe->screen;
540     struct r300_context *r300 = r300_context(pipe);
541     struct pipe_framebuffer_state *fb =
542         (struct pipe_framebuffer_state*)r300->fb_state.state;
543     unsigned src_width0 = r300_resource(src)->tex.width0;
544     unsigned src_height0 = r300_resource(src)->tex.height0;
545     unsigned dst_width0 = r300_resource(dst)->tex.width0;
546     unsigned dst_height0 = r300_resource(dst)->tex.height0;
547     unsigned layout;
548     struct pipe_box box, dstbox;
549     struct pipe_sampler_view src_templ, *src_view;
550     struct pipe_surface dst_templ, *dst_view;
551 
552     /* Fallback for buffers. */
553     if ((dst->target == PIPE_BUFFER && src->target == PIPE_BUFFER) ||
554         !r300_is_blit_supported(dst->format)) {
555         util_resource_copy_region(pipe, dst, dst_level, dstx, dsty, dstz,
556                                   src, src_level, src_box);
557         return;
558     }
559 
560     /* Can't read MSAA textures. */
561     if (src->nr_samples > 1 || dst->nr_samples > 1) {
562         return;
563     }
564 
565     /* The code below changes the texture format so that the copy can be done
566      * on hardware. E.g. depth-stencil surfaces are copied as RGBA
567      * colorbuffers. */
568 
569     util_blitter_default_dst_texture(&dst_templ, dst, dst_level, dstz);
570     util_blitter_default_src_texture(r300->blitter, &src_templ, src, src_level);
571 
572     layout = util_format_description(dst_templ.format)->layout;
573 
574     /* Handle non-renderable plain formats. */
575     if (layout == UTIL_FORMAT_LAYOUT_PLAIN &&
576         (!screen->is_format_supported(screen, src_templ.format, src->target,
577                                       src->nr_samples,
578                                       PIPE_BIND_SAMPLER_VIEW) ||
579          !screen->is_format_supported(screen, dst_templ.format, dst->target,
580                                       dst->nr_samples,
581                                       PIPE_BIND_RENDER_TARGET))) {
582         switch (util_format_get_blocksize(dst_templ.format)) {
583             case 1:
584                 dst_templ.format = PIPE_FORMAT_I8_UNORM;
585                 break;
586             case 2:
587                 dst_templ.format = PIPE_FORMAT_B4G4R4A4_UNORM;
588                 break;
589             case 4:
590                 dst_templ.format = PIPE_FORMAT_B8G8R8A8_UNORM;
591                 break;
592             case 8:
593                 dst_templ.format = PIPE_FORMAT_R16G16B16A16_UNORM;
594                 break;
595             default:
596                 debug_printf("r300: copy_region: Unhandled format: %s. Falling back to software.\n"
597                              "r300: copy_region: Software fallback doesn't work for tiled textures.\n",
598                              util_format_short_name(dst_templ.format));
599         }
600         src_templ.format = dst_templ.format;
601     }
602 
603     /* Handle compressed formats. */
604     if (layout == UTIL_FORMAT_LAYOUT_S3TC ||
605         layout == UTIL_FORMAT_LAYOUT_RGTC) {
606         assert(src_templ.format == dst_templ.format);
607 
608         box = *src_box;
609         src_box = &box;
610 
611         dst_width0 = align(dst_width0, 4);
612         dst_height0 = align(dst_height0, 4);
613         src_width0 = align(src_width0, 4);
614         src_height0 = align(src_height0, 4);
615         box.width = align(box.width, 4);
616         box.height = align(box.height, 4);
617 
618         switch (util_format_get_blocksize(dst_templ.format)) {
619         case 8:
620             /* one 4x4 pixel block has 8 bytes.
621              * we set 1 pixel = 4 bytes ===> 1 block corrensponds to 2 pixels. */
622             dst_templ.format = PIPE_FORMAT_R8G8B8A8_UNORM;
623             dst_width0 = dst_width0 / 2;
624             src_width0 = src_width0 / 2;
625             dstx /= 2;
626             box.x /= 2;
627             box.width /= 2;
628             break;
629         case 16:
630             /* one 4x4 pixel block has 16 bytes.
631              * we set 1 pixel = 4 bytes ===> 1 block corresponds to 4 pixels. */
632             dst_templ.format = PIPE_FORMAT_R8G8B8A8_UNORM;
633             break;
634         }
635         src_templ.format = dst_templ.format;
636 
637         dst_height0 = dst_height0 / 4;
638         src_height0 = src_height0 / 4;
639         dsty /= 4;
640         box.y /= 4;
641         box.height /= 4;
642     }
643 
644     /* Fallback for textures. */
645     if (!screen->is_format_supported(screen, dst_templ.format,
646                                      dst->target, dst->nr_samples,
647                                      PIPE_BIND_RENDER_TARGET) ||
648 	!screen->is_format_supported(screen, src_templ.format,
649                                      src->target, src->nr_samples,
650                                      PIPE_BIND_SAMPLER_VIEW)) {
651         assert(0 && "this shouldn't happen, update r300_is_blit_supported");
652         util_resource_copy_region(pipe, dst, dst_level, dstx, dsty, dstz,
653                                   src, src_level, src_box);
654         return;
655     }
656 
657     /* Decompress ZMASK. */
658     if (r300->zmask_in_use && !r300->locked_zbuffer) {
659         if (fb->zsbuf->texture == src ||
660             fb->zsbuf->texture == dst) {
661             r300_decompress_zmask(r300);
662         }
663     }
664 
665     dst_view = r300_create_surface_custom(pipe, dst, &dst_templ, dst_width0, dst_height0);
666     src_view = r300_create_sampler_view_custom(pipe, src, &src_templ, src_width0, src_height0);
667 
668     u_box_3d(dstx, dsty, dstz, abs(src_box->width), abs(src_box->height),
669              abs(src_box->depth), &dstbox);
670 
671     r300_blitter_begin(r300, R300_COPY);
672     util_blitter_blit_generic(r300->blitter, dst_view, &dstbox,
673                               src_view, src_box, src_width0, src_height0,
674                               PIPE_MASK_RGBAZS, PIPE_TEX_FILTER_NEAREST, NULL,
675                               FALSE);
676     r300_blitter_end(r300);
677 
678     pipe_surface_reference(&dst_view, NULL);
679     pipe_sampler_view_reference(&src_view, NULL);
680 }
681 
r300_is_simple_msaa_resolve(const struct pipe_blit_info * info)682 static boolean r300_is_simple_msaa_resolve(const struct pipe_blit_info *info)
683 {
684     unsigned dst_width = u_minify(info->dst.resource->width0, info->dst.level);
685     unsigned dst_height = u_minify(info->dst.resource->height0, info->dst.level);
686 
687     return info->src.resource->nr_samples > 1 &&
688            info->dst.resource->nr_samples <= 1 &&
689            info->dst.resource->format == info->src.resource->format &&
690            info->dst.resource->format == info->dst.format &&
691            info->src.resource->format == info->src.format &&
692            !info->scissor_enable &&
693            info->mask == PIPE_MASK_RGBA &&
694            dst_width == info->src.resource->width0 &&
695            dst_height == info->src.resource->height0 &&
696            info->dst.box.x == 0 &&
697            info->dst.box.y == 0 &&
698            info->dst.box.width == dst_width &&
699            info->dst.box.height == dst_height &&
700            info->src.box.x == 0 &&
701            info->src.box.y == 0 &&
702            info->src.box.width == dst_width &&
703            info->src.box.height == dst_height &&
704            (r300_resource(info->dst.resource)->tex.microtile != RADEON_LAYOUT_LINEAR ||
705             r300_resource(info->dst.resource)->tex.macrotile[info->dst.level] != RADEON_LAYOUT_LINEAR);
706 }
707 
r300_simple_msaa_resolve(struct pipe_context * pipe,struct pipe_resource * dst,unsigned dst_level,unsigned dst_layer,struct pipe_resource * src,enum pipe_format format)708 static void r300_simple_msaa_resolve(struct pipe_context *pipe,
709                                      struct pipe_resource *dst,
710                                      unsigned dst_level,
711                                      unsigned dst_layer,
712                                      struct pipe_resource *src,
713                                      enum pipe_format format)
714 {
715     struct r300_context *r300 = r300_context(pipe);
716     struct r300_surface *srcsurf, *dstsurf;
717     struct pipe_surface surf_tmpl;
718     struct r300_aa_state *aa = (struct r300_aa_state*)r300->aa_state.state;
719 
720     memset(&surf_tmpl, 0, sizeof(surf_tmpl));
721     surf_tmpl.format = format;
722     srcsurf = r300_surface(pipe->create_surface(pipe, src, &surf_tmpl));
723 
724     surf_tmpl.format = format;
725     surf_tmpl.u.tex.level = dst_level;
726     surf_tmpl.u.tex.first_layer =
727     surf_tmpl.u.tex.last_layer = dst_layer;
728     dstsurf = r300_surface(pipe->create_surface(pipe, dst, &surf_tmpl));
729 
730     /* COLORPITCH should contain the tiling info of the resolve buffer.
731      * The tiling of the AA buffer isn't programmable anyway. */
732     srcsurf->pitch &= ~(R300_COLOR_TILE(1) | R300_COLOR_MICROTILE(3));
733     srcsurf->pitch |= dstsurf->pitch & (R300_COLOR_TILE(1) | R300_COLOR_MICROTILE(3));
734 
735     /* Enable AA resolve. */
736     aa->dest = dstsurf;
737     r300->aa_state.size = 8;
738     r300_mark_atom_dirty(r300, &r300->aa_state);
739 
740     /* Resolve the surface. */
741     r300_blitter_begin(r300, R300_CLEAR_SURFACE);
742     util_blitter_custom_color(r300->blitter, &srcsurf->base, NULL);
743     r300_blitter_end(r300);
744 
745     /* Disable AA resolve. */
746     aa->dest = NULL;
747     r300->aa_state.size = 4;
748     r300_mark_atom_dirty(r300, &r300->aa_state);
749 
750     pipe_surface_reference((struct pipe_surface**)&srcsurf, NULL);
751     pipe_surface_reference((struct pipe_surface**)&dstsurf, NULL);
752 }
753 
r300_msaa_resolve(struct pipe_context * pipe,const struct pipe_blit_info * info)754 static void r300_msaa_resolve(struct pipe_context *pipe,
755                               const struct pipe_blit_info *info)
756 {
757     struct r300_context *r300 = r300_context(pipe);
758     struct pipe_screen *screen = pipe->screen;
759     struct pipe_resource *tmp, templ;
760     struct pipe_blit_info blit;
761 
762     assert(info->src.level == 0);
763     assert(info->src.box.z == 0);
764     assert(info->src.box.depth == 1);
765     assert(info->dst.box.depth == 1);
766 
767     if (r300_is_simple_msaa_resolve(info)) {
768         r300_simple_msaa_resolve(pipe, info->dst.resource, info->dst.level,
769                                  info->dst.box.z, info->src.resource,
770                                  info->src.format);
771         return;
772     }
773 
774     /* resolve into a temporary texture, then blit */
775     memset(&templ, 0, sizeof(templ));
776     templ.target = PIPE_TEXTURE_2D;
777     templ.format = info->src.resource->format;
778     templ.width0 = info->src.resource->width0;
779     templ.height0 = info->src.resource->height0;
780     templ.depth0 = 1;
781     templ.array_size = 1;
782     templ.usage = PIPE_USAGE_DEFAULT;
783     templ.flags = R300_RESOURCE_FORCE_MICROTILING;
784 
785     tmp = screen->resource_create(screen, &templ);
786 
787     /* resolve */
788     r300_simple_msaa_resolve(pipe, tmp, 0, 0, info->src.resource,
789                              info->src.format);
790 
791     /* blit */
792     blit = *info;
793     blit.src.resource = tmp;
794     blit.src.box.z = 0;
795 
796     r300_blitter_begin(r300, R300_BLIT | R300_IGNORE_RENDER_COND);
797     util_blitter_blit(r300->blitter, &blit);
798     r300_blitter_end(r300);
799 
800     pipe_resource_reference(&tmp, NULL);
801 }
802 
r300_blit(struct pipe_context * pipe,const struct pipe_blit_info * blit)803 static void r300_blit(struct pipe_context *pipe,
804                       const struct pipe_blit_info *blit)
805 {
806     struct r300_context *r300 = r300_context(pipe);
807     struct pipe_framebuffer_state *fb =
808         (struct pipe_framebuffer_state*)r300->fb_state.state;
809     struct pipe_blit_info info = *blit;
810 
811     /* The driver supports sRGB textures but not framebuffers. Blitting
812      * from sRGB to sRGB should be the same as blitting from linear
813      * to linear, so use that, This avoids incorrect linearization.
814      */
815     if (util_format_is_srgb(info.src.format)) {
816       info.src.format = util_format_linear(info.src.format);
817       info.dst.format = util_format_linear(info.dst.format);
818     }
819 
820     /* MSAA resolve. */
821     if (info.src.resource->nr_samples > 1 &&
822         !util_format_is_depth_or_stencil(info.src.resource->format)) {
823         r300_msaa_resolve(pipe, &info);
824         return;
825     }
826 
827     /* Can't read MSAA textures. */
828     if (info.src.resource->nr_samples > 1) {
829         return;
830     }
831 
832     /* Blit a combined depth-stencil resource as color.
833      * S8Z24 is the only supported stencil format. */
834     if ((info.mask & PIPE_MASK_S) &&
835         info.src.format == PIPE_FORMAT_S8_UINT_Z24_UNORM &&
836         info.dst.format == PIPE_FORMAT_S8_UINT_Z24_UNORM) {
837         if (info.dst.resource->nr_samples > 1) {
838             /* Cannot do that with MSAA buffers. */
839             info.mask &= ~PIPE_MASK_S;
840             if (!(info.mask & PIPE_MASK_Z)) {
841                 return;
842             }
843         } else {
844             /* Single-sample buffer. */
845             info.src.format = PIPE_FORMAT_B8G8R8A8_UNORM;
846             info.dst.format = PIPE_FORMAT_B8G8R8A8_UNORM;
847             if (info.mask & PIPE_MASK_Z) {
848                 info.mask = PIPE_MASK_RGBA; /* depth+stencil */
849             } else {
850                 info.mask = PIPE_MASK_B; /* stencil only */
851             }
852         }
853     }
854 
855     /* Decompress ZMASK. */
856     if (r300->zmask_in_use && !r300->locked_zbuffer) {
857         if (fb->zsbuf->texture == info.src.resource ||
858             fb->zsbuf->texture == info.dst.resource) {
859             r300_decompress_zmask(r300);
860         }
861     }
862 
863     r300_blitter_begin(r300, R300_BLIT |
864 		       (info.render_condition_enable ? 0 : R300_IGNORE_RENDER_COND));
865     util_blitter_blit(r300->blitter, &info);
866     r300_blitter_end(r300);
867 }
868 
r300_flush_resource(struct pipe_context * ctx,struct pipe_resource * resource)869 static void r300_flush_resource(struct pipe_context *ctx,
870 				struct pipe_resource *resource)
871 {
872 }
873 
r300_init_blit_functions(struct r300_context * r300)874 void r300_init_blit_functions(struct r300_context *r300)
875 {
876     r300->context.clear = r300_clear;
877     r300->context.clear_render_target = r300_clear_render_target;
878     r300->context.clear_depth_stencil = r300_clear_depth_stencil;
879     r300->context.resource_copy_region = r300_resource_copy_region;
880     r300->context.blit = r300_blit;
881     r300->context.flush_resource = r300_flush_resource;
882 }
883