2 * Copyright © 2017 Intel Corporation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included
12 * in all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
24 #include "pipe/p_defines.h"
25 #include "pipe/p_state.h"
26 #include "pipe/p_context.h"
27 #include "pipe/p_screen.h"
28 #include "util/u_format.h"
29 #include "util/u_inlines.h"
30 #include "util/ralloc.h"
31 #include "intel/blorp/blorp.h"
32 #include "iris_context.h"
33 #include "iris_resource.h"
34 #include "iris_screen.h"
37 * Helper function for handling mirror image blits.
39 * If coord0 > coord1, swap them and return "true" (mirrored).
42 apply_mirror(float *coord0
, float *coord1
)
44 if (*coord0
> *coord1
) {
54 * Compute the number of pixels to clip for each side of a rect
56 * \param x0 The rect's left coordinate
57 * \param y0 The rect's bottom coordinate
58 * \param x1 The rect's right coordinate
59 * \param y1 The rect's top coordinate
60 * \param min_x The clipping region's left coordinate
61 * \param min_y The clipping region's bottom coordinate
62 * \param max_x The clipping region's right coordinate
63 * \param max_y The clipping region's top coordinate
64 * \param clipped_x0 The number of pixels to clip from the left side
65 * \param clipped_y0 The number of pixels to clip from the bottom side
66 * \param clipped_x1 The number of pixels to clip from the right side
67 * \param clipped_y1 The number of pixels to clip from the top side
69 * \return false if we clip everything away, true otherwise
72 compute_pixels_clipped(float x0
, float y0
, float x1
, float y1
,
73 float min_x
, float min_y
, float max_x
, float max_y
,
74 float *clipped_x0
, float *clipped_y0
,
75 float *clipped_x1
, float *clipped_y1
)
77 /* If we are going to clip everything away, stop. */
78 if (!(min_x
<= max_x
&&
90 *clipped_x0
= min_x
- x0
;
94 *clipped_x1
= x1
- max_x
;
99 *clipped_y0
= min_y
- y0
;
103 *clipped_y1
= y1
- max_y
;
111 * Clips a coordinate (left, right, top or bottom) for the src or dst rect
112 * (whichever requires the largest clip) and adjusts the coordinate
113 * for the other rect accordingly.
115 * \param mirror true if mirroring is required
116 * \param src the source rect coordinate (for example src_x0)
117 * \param dst0 the dst rect coordinate (for example dst_x0)
118 * \param dst1 the opposite dst rect coordinate (for example dst_x1)
119 * \param clipped_dst0 number of pixels to clip from the dst coordinate
120 * \param clipped_dst1 number of pixels to clip from the opposite dst coordinate
121 * \param scale the src vs dst scale involved for that coordinate
122 * \param is_left_or_bottom true if we are clipping the left or bottom sides
126 clip_coordinates(bool mirror
,
127 float *src
, float *dst0
, float *dst1
,
131 bool is_left_or_bottom
)
133 /* When clipping we need to add or subtract pixels from the original
134 * coordinates depending on whether we are acting on the left/bottom
135 * or right/top sides of the rect respectively. We assume we have to
136 * add them in the code below, and multiply by -1 when we should
139 int mult
= is_left_or_bottom
? 1 : -1;
142 *dst0
+= clipped_dst0
* mult
;
143 *src
+= clipped_dst0
* scale
* mult
;
145 *dst1
-= clipped_dst1
* mult
;
146 *src
+= clipped_dst1
* scale
* mult
;
151 * Apply a scissor rectangle to blit coordinates.
153 * Returns true if the blit was entirely scissored away.
156 apply_blit_scissor(const struct pipe_scissor_state
*scissor
,
157 float *src_x0
, float *src_y0
,
158 float *src_x1
, float *src_y1
,
159 float *dst_x0
, float *dst_y0
,
160 float *dst_x1
, float *dst_y1
,
161 bool mirror_x
, bool mirror_y
)
163 float clip_dst_x0
, clip_dst_x1
, clip_dst_y0
, clip_dst_y1
;
165 /* Compute number of pixels to scissor away. */
166 if (!compute_pixels_clipped(*dst_x0
, *dst_y0
, *dst_x1
, *dst_y1
,
167 scissor
->minx
, scissor
->miny
,
168 scissor
->maxx
, scissor
->maxy
,
169 &clip_dst_x0
, &clip_dst_y0
,
170 &clip_dst_x1
, &clip_dst_y1
))
173 // XXX: comments assume source clipping, which we don't do
175 /* When clipping any of the two rects we need to adjust the coordinates
176 * in the other rect considering the scaling factor involved. To obtain
177 * the best precision we want to make sure that we only clip once per
178 * side to avoid accumulating errors due to the scaling adjustment.
180 * For example, if src_x0 and dst_x0 need both to be clipped we want to
181 * avoid the situation where we clip src_x0 first, then adjust dst_x0
182 * accordingly but then we realize that the resulting dst_x0 still needs
183 * to be clipped, so we clip dst_x0 and adjust src_x0 again. Because we are
184 * applying scaling factors to adjust the coordinates in each clipping
185 * pass we lose some precision and that can affect the results of the
186 * blorp blit operation slightly. What we want to do here is detect the
187 * rect that we should clip first for each side so that when we adjust
188 * the other rect we ensure the resulting coordinate does not need to be
191 * The code below implements this by comparing the number of pixels that
192 * we need to clip for each side of both rects considering the scales
193 * involved. For example, clip_src_x0 represents the number of pixels
194 * to be clipped for the src rect's left side, so if clip_src_x0 = 5,
195 * clip_dst_x0 = 4 and scale_x = 2 it means that we are clipping more
196 * from the dst rect so we should clip dst_x0 only and adjust src_x0.
197 * This is because clipping 4 pixels in the dst is equivalent to
198 * clipping 4 * 2 = 8 > 5 in the src.
201 float scale_x
= (float) (*src_x1
- *src_x0
) / (*dst_x1
- *dst_x0
);
202 float scale_y
= (float) (*src_y1
- *src_y0
) / (*dst_y1
- *dst_y0
);
205 clip_coordinates(mirror_x
, src_x0
, dst_x0
, dst_x1
,
206 clip_dst_x0
, clip_dst_x1
, scale_x
, true);
208 /* Clip right side */
209 clip_coordinates(mirror_x
, src_x1
, dst_x1
, dst_x0
,
210 clip_dst_x1
, clip_dst_x0
, scale_x
, false);
212 /* Clip bottom side */
213 clip_coordinates(mirror_y
, src_y0
, dst_y0
, dst_y1
,
214 clip_dst_y0
, clip_dst_y1
, scale_y
, true);
217 clip_coordinates(mirror_y
, src_y1
, dst_y1
, dst_y0
,
218 clip_dst_y1
, clip_dst_y0
, scale_y
, false);
224 iris_blorp_surf_for_resource(struct blorp_surf
*surf
,
225 struct pipe_resource
*p_res
,
226 enum isl_aux_usage aux_usage
,
227 bool is_render_target
)
229 struct iris_resource
*res
= (void *) p_res
;
231 *surf
= (struct blorp_surf
) {
233 .addr
= (struct blorp_address
) {
235 .offset
= 0, // XXX: ???
236 .reloc_flags
= is_render_target
? EXEC_OBJECT_WRITE
: 0,
237 .mocs
= I915_MOCS_CACHED
, // XXX: BDW MOCS, PTE MOCS
239 .aux_usage
= aux_usage
,
242 assert(surf
->aux_usage
== ISL_AUX_USAGE_NONE
);
246 * The pipe->blit() driver hook.
248 * This performs a blit between two surfaces, which copies data but may
249 * also perform format conversion, scaling, flipping, and so on.
252 iris_blit(struct pipe_context
*ctx
, const struct pipe_blit_info
*info
)
254 struct iris_context
*ice
= (void *) ctx
;
255 struct iris_screen
*screen
= (struct iris_screen
*)ctx
->screen
;
256 const struct gen_device_info
*devinfo
= &screen
->devinfo
;
258 struct blorp_surf src_surf
, dst_surf
;
259 iris_blorp_surf_for_resource(&src_surf
, info
->src
.resource
,
260 ISL_AUX_USAGE_NONE
, false);
261 iris_blorp_surf_for_resource(&dst_surf
, info
->dst
.resource
,
262 ISL_AUX_USAGE_NONE
, true);
264 struct iris_format_info src_fmt
=
265 iris_format_for_usage(devinfo
, info
->src
.format
,
266 ISL_SURF_USAGE_TEXTURE_BIT
);
267 struct iris_format_info dst_fmt
=
268 iris_format_for_usage(devinfo
, info
->dst
.format
,
269 ISL_SURF_USAGE_RENDER_TARGET_BIT
);
271 float src_x0
= info
->src
.box
.x
;
272 float src_x1
= info
->src
.box
.x
+ info
->src
.box
.width
;
273 float src_y0
= info
->src
.box
.y
;
274 float src_y1
= info
->src
.box
.y
+ info
->src
.box
.height
;
275 float dst_x0
= info
->dst
.box
.x
;
276 float dst_x1
= info
->dst
.box
.x
+ info
->dst
.box
.width
;
277 float dst_y0
= info
->dst
.box
.y
;
278 float dst_y1
= info
->dst
.box
.y
+ info
->dst
.box
.height
;
279 bool mirror_x
= apply_mirror(&src_x0
, &src_x1
);
280 bool mirror_y
= apply_mirror(&src_y0
, &src_y1
);
281 enum blorp_filter filter
;
283 if (info
->scissor_enable
) {
284 bool noop
= apply_blit_scissor(&info
->scissor
,
285 &src_x0
, &src_y0
, &src_x1
, &src_y1
,
286 &dst_x0
, &dst_y0
, &dst_x1
, &dst_y1
,
292 if (abs(info
->dst
.box
.width
) == abs(info
->src
.box
.width
) &&
293 abs(info
->dst
.box
.height
) == abs(info
->src
.box
.height
)) {
294 if (src_surf
.surf
->samples
> 1 && dst_surf
.surf
->samples
<= 1) {
295 /* The OpenGL ES 3.2 specification, section 16.2.1, says:
297 * "If the read framebuffer is multisampled (its effective
298 * value of SAMPLE_BUFFERS is one) and the draw framebuffer
299 * is not (its value of SAMPLE_BUFFERS is zero), the samples
300 * corresponding to each pixel location in the source are
301 * converted to a single sample before being written to the
302 * destination. The filter parameter is ignored. If the
303 * source formats are integer types or stencil values, a
304 * single sample’s value is selected for each pixel. If the
305 * source formats are floating-point or normalized types,
306 * the sample values for each pixel are resolved in an
307 * implementation-dependent manner. If the source formats
308 * are depth values, sample values are resolved in an
309 * implementation-dependent manner where the result will be
310 * between the minimum and maximum depth values in the pixel."
312 * When selecting a single sample, we always choose sample 0.
314 if (util_format_is_depth_or_stencil(info
->src
.format
) ||
315 util_format_is_pure_integer(info
->src
.format
)) {
316 filter
= BLORP_FILTER_SAMPLE_0
;
318 filter
= BLORP_FILTER_AVERAGE
;
321 /* The OpenGL 4.6 specification, section 18.3.1, says:
323 * "If the source and destination dimensions are identical,
324 * no filtering is applied."
326 * Using BLORP_FILTER_NONE will also handle the upsample case by
327 * replicating the one value in the source to all values in the
330 filter
= BLORP_FILTER_NONE
;
332 } else if (info
->filter
== PIPE_TEX_FILTER_LINEAR
) {
333 filter
= BLORP_FILTER_BILINEAR
;
335 filter
= BLORP_FILTER_NEAREST
;
338 struct iris_batch
*batch
= &ice
->batches
[IRIS_BATCH_RENDER
];
340 struct blorp_batch blorp_batch
;
341 blorp_batch_init(&ice
->blorp
, &blorp_batch
, batch
, 0);
343 for (int slice
= 0; slice
< info
->dst
.box
.depth
; slice
++) {
344 iris_batch_maybe_flush(batch
, 1500);
346 blorp_blit(&blorp_batch
,
347 &src_surf
, info
->src
.level
, info
->src
.box
.z
+ slice
,
348 src_fmt
.fmt
, src_fmt
.swizzle
,
349 &dst_surf
, info
->dst
.level
, info
->dst
.box
.z
+ slice
,
350 dst_fmt
.fmt
, ISL_SWIZZLE_IDENTITY
,
351 src_x0
, src_y0
, src_x1
, src_y1
,
352 dst_x0
, dst_y0
, dst_x1
, dst_y1
,
353 filter
, mirror_x
, mirror_y
);
356 if (util_format_is_depth_and_stencil(info
->dst
.format
) &&
357 util_format_has_stencil(util_format_description(info
->src
.format
))) {
358 struct iris_resource
*src_res
, *dst_res
, *junk
;
359 iris_get_depth_stencil_resources(info
->src
.resource
, &junk
, &src_res
);
360 iris_get_depth_stencil_resources(info
->dst
.resource
, &junk
, &dst_res
);
361 iris_blorp_surf_for_resource(&src_surf
, &src_res
->base
,
362 ISL_AUX_USAGE_NONE
, false);
363 iris_blorp_surf_for_resource(&dst_surf
, &dst_res
->base
,
364 ISL_AUX_USAGE_NONE
, true);
366 for (int slice
= 0; slice
< info
->dst
.box
.depth
; slice
++) {
367 iris_batch_maybe_flush(batch
, 1500);
369 blorp_blit(&blorp_batch
,
370 &src_surf
, info
->src
.level
, info
->src
.box
.z
+ slice
,
371 ISL_FORMAT_R8_UINT
, ISL_SWIZZLE_IDENTITY
,
372 &dst_surf
, info
->dst
.level
, info
->dst
.box
.z
+ slice
,
373 ISL_FORMAT_R8_UINT
, ISL_SWIZZLE_IDENTITY
,
374 src_x0
, src_y0
, src_x1
, src_y1
,
375 dst_x0
, dst_y0
, dst_x1
, dst_y1
,
376 filter
, mirror_x
, mirror_y
);
380 blorp_batch_finish(&blorp_batch
);
384 * The pipe->resource_copy_region() driver hook.
386 * This implements ARB_copy_image semantics - a raw memory copy between
387 * compatible view classes.
390 iris_resource_copy_region(struct pipe_context
*ctx
,
391 struct pipe_resource
*dst
,
393 unsigned dstx
, unsigned dsty
, unsigned dstz
,
394 struct pipe_resource
*src
,
396 const struct pipe_box
*src_box
)
398 struct blorp_batch blorp_batch
;
399 struct iris_context
*ice
= (void *) ctx
;
400 struct iris_batch
*batch
= &ice
->batches
[IRIS_BATCH_RENDER
];
402 iris_batch_maybe_flush(batch
, 1500);
404 blorp_batch_init(&ice
->blorp
, &blorp_batch
, batch
, 0);
406 if (dst
->target
== PIPE_BUFFER
&& src
->target
== PIPE_BUFFER
) {
407 struct blorp_address src_addr
= {
408 .buffer
= iris_resource_bo(src
), .offset
= src_box
->x
,
410 struct blorp_address dst_addr
= {
411 .buffer
= iris_resource_bo(dst
), .offset
= dstx
,
414 blorp_buffer_copy(&blorp_batch
, src_addr
, dst_addr
, src_box
->width
);
416 // XXX: what about one surface being a buffer and not the other?
418 struct blorp_surf src_surf
, dst_surf
;
419 iris_blorp_surf_for_resource(&src_surf
, src
, ISL_AUX_USAGE_NONE
, false);
420 iris_blorp_surf_for_resource(&dst_surf
, dst
, ISL_AUX_USAGE_NONE
, true);
423 unsigned dst_layer
= dstz
;
424 unsigned src_layer
= src_box
->z
;
426 assert(src_box
->depth
== 1);
428 blorp_copy(&blorp_batch
, &src_surf
, src_level
, src_layer
,
429 &dst_surf
, dst_level
, dst_layer
,
430 src_box
->x
, src_box
->y
, dstx
, dsty
,
431 src_box
->width
, src_box
->height
);
434 blorp_batch_finish(&blorp_batch
);
438 iris_init_blit_functions(struct pipe_context
*ctx
)
440 ctx
->blit
= iris_blit
;
441 ctx
->resource_copy_region
= iris_resource_copy_region
;