1/*
2 * Copyright © 2013 Intel Corporation
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 * 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:
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 NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24#include "main/mtypes.h"
25#include "main/macros.h"
26#include "main/samplerobj.h"
27#include "main/teximage.h"
28#include "main/texobj.h"
29
30#include "brw_context.h"
31#include "brw_mipmap_tree.h"
32#include "brw_tex.h"
33
34#define FILE_DEBUG_FLAG DEBUG_TEXTURE
35
36/**
37 * Sets our driver-specific variant of tObj->_MaxLevel for later surface state
38 * upload.
39 *
40 * If we're only ensuring that there is storage for the first miplevel of a
41 * texture, then in texture setup we're going to have to make sure we don't
42 * allow sampling beyond level 0.
43 */
44static void
45brw_update_max_level(struct gl_texture_object *tObj,
46                     struct gl_sampler_object *sampler)
47{
48   struct brw_texture_object *brw_obj = brw_texture_object(tObj);
49
50   if (!tObj->_MipmapComplete ||
51       (tObj->_RenderToTexture &&
52        (sampler->Attrib.MinFilter == GL_NEAREST ||
53         sampler->Attrib.MinFilter == GL_LINEAR))) {
54      brw_obj->_MaxLevel = tObj->Attrib.BaseLevel;
55   } else {
56      brw_obj->_MaxLevel = tObj->_MaxLevel;
57   }
58}
59
60/**
61 * At rendering-from-a-texture time, make sure that the texture object has a
62 * miptree that can hold the entire texture based on
63 * BaseLevel/MaxLevel/filtering, and copy in any texture images that are
64 * stored in other miptrees.
65 */
66void
67brw_finalize_mipmap_tree(struct brw_context *brw,
68                           struct gl_texture_object *tObj)
69{
70   struct brw_texture_object *brw_obj = brw_texture_object(tObj);
71   GLuint face, i;
72   GLuint nr_faces = 0;
73   struct brw_texture_image *firstImage;
74   int width, height, depth;
75
76   /* TBOs require no validation -- they always just point to their BO. */
77   if (tObj->Target == GL_TEXTURE_BUFFER)
78      return;
79
80   /* What levels does this validated texture image require? */
81   int validate_first_level = tObj->Attrib.BaseLevel;
82   int validate_last_level = brw_obj->_MaxLevel;
83
84   /* Skip the loop over images in the common case of no images having
85    * changed.  But if the GL_BASE_LEVEL or GL_MAX_LEVEL change to something we
86    * haven't looked at, then we do need to look at those new images.
87    */
88   if (!brw_obj->needs_validate &&
89       validate_first_level >= brw_obj->validated_first_level &&
90       validate_last_level <= brw_obj->validated_last_level) {
91      return;
92   }
93
94   /* On recent generations, immutable textures should not get this far
95    * -- they should have been created in a validated state, and nothing
96    * can invalidate them.
97    *
98    * Unfortunately, this is not true on pre-Sandybridge hardware -- when
99    * rendering into an immutable-format depth texture we may have to rebase
100    * the rendered levels to meet alignment requirements.
101    *
102    * FINISHME: Avoid doing this.
103    */
104   assert(!tObj->Immutable || brw->screen->devinfo.ver < 6);
105
106   firstImage = brw_texture_image(tObj->Image[0][tObj->Attrib.BaseLevel]);
107   if (!firstImage)
108      return;
109
110   /* Check tree can hold all active levels.  Check tree matches
111    * target, imageFormat, etc.
112    */
113   if (brw_obj->mt &&
114       (!brw_miptree_match_image(brw_obj->mt, &firstImage->base.Base) ||
115        validate_first_level < brw_obj->mt->first_level ||
116        validate_last_level > brw_obj->mt->last_level)) {
117      brw_miptree_release(&brw_obj->mt);
118   }
119
120
121   /* May need to create a new tree:
122    */
123   if (!brw_obj->mt) {
124      const unsigned level = firstImage->base.Base.Level;
125      brw_get_image_dims(&firstImage->base.Base, &width, &height, &depth);
126      /* Figure out image dimensions at start level. */
127      switch(brw_obj->base.Target) {
128      case GL_TEXTURE_2D_MULTISAMPLE:
129      case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
130      case GL_TEXTURE_RECTANGLE:
131      case GL_TEXTURE_EXTERNAL_OES:
132          assert(level == 0);
133          break;
134      case GL_TEXTURE_3D:
135          depth = depth << level;
136          FALLTHROUGH;
137      case GL_TEXTURE_2D:
138      case GL_TEXTURE_2D_ARRAY:
139      case GL_TEXTURE_CUBE_MAP:
140      case GL_TEXTURE_CUBE_MAP_ARRAY:
141          height = height << level;
142          FALLTHROUGH;
143      case GL_TEXTURE_1D:
144      case GL_TEXTURE_1D_ARRAY:
145          width = width << level;
146          break;
147      default:
148          unreachable("Unexpected target");
149      }
150      perf_debug("Creating new %s %dx%dx%d %d-level miptree to handle "
151                 "finalized texture miptree.\n",
152                 _mesa_get_format_name(firstImage->base.Base.TexFormat),
153                 width, height, depth, validate_last_level + 1);
154
155      brw_obj->mt = brw_miptree_create(brw,
156                                       brw_obj->base.Target,
157                                       firstImage->base.Base.TexFormat,
158                                       0, /* first_level */
159                                       validate_last_level,
160                                       width,
161                                       height,
162                                       depth,
163                                       1 /* num_samples */,
164                                       MIPTREE_CREATE_BUSY);
165      if (!brw_obj->mt)
166         return;
167   }
168
169   /* Pull in any images not in the object's tree:
170    */
171   nr_faces = _mesa_num_tex_faces(brw_obj->base.Target);
172   for (face = 0; face < nr_faces; face++) {
173      for (i = validate_first_level; i <= validate_last_level; i++) {
174         struct brw_texture_image *brw_image =
175            brw_texture_image(brw_obj->base.Image[face][i]);
176         /* skip too small size mipmap */
177         if (brw_image == NULL)
178            break;
179
180         if (brw_obj->mt != brw_image->mt)
181            brw_miptree_copy_teximage(brw, brw_image, brw_obj->mt);
182
183         /* After we're done, we'd better agree that our layout is
184          * appropriate, or we'll end up hitting this function again on the
185          * next draw
186          */
187         assert(brw_miptree_match_image(brw_obj->mt, &brw_image->base.Base));
188      }
189   }
190
191   brw_obj->validated_first_level = validate_first_level;
192   brw_obj->validated_last_level = validate_last_level;
193   brw_obj->_Format = firstImage->base.Base.TexFormat,
194   brw_obj->needs_validate = false;
195}
196
197/**
198 * Finalizes all textures, completing any rendering that needs to be done
199 * to prepare them.
200 */
201void
202brw_validate_textures(struct brw_context *brw)
203{
204   struct gl_context *ctx = &brw->ctx;
205   const int max_enabled_unit = ctx->Texture._MaxEnabledTexImageUnit;
206
207   for (int unit = 0; unit <= max_enabled_unit; unit++) {
208      struct gl_texture_object *tex_obj = ctx->Texture.Unit[unit]._Current;
209
210      if (!tex_obj)
211         continue;
212
213      struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
214
215      /* We know that this is true by now, and if it wasn't, we might have
216       * mismatched level sizes and the copies would fail.
217       */
218      assert(tex_obj->_BaseComplete);
219
220      brw_update_max_level(tex_obj, sampler);
221      brw_finalize_mipmap_tree(brw, tex_obj);
222   }
223}
224