src/mesa/drivers/dri/i965/intel_tex_validate.c

   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/texobj.h"
  28
  29 #include "brw_context.h"
  30 #include "intel_mipmap_tree.h"
  31 #include "intel_blit.h"
  32 #include "intel_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  */
  44 static void
  45 intel_update_max_level(struct intel_texture_object *intelObj,
  46                        struct gl_sampler_object *sampler)
  47 {
  48    struct gl_texture_object *tObj = &intelObj->base;
  49
  50    if (sampler->MinFilter == GL_NEAREST ||
  51        sampler->MinFilter == GL_LINEAR) {
  52       intelObj->_MaxLevel = tObj->BaseLevel;
  53    } else {
  54       intelObj->_MaxLevel = tObj->_MaxLevel;
  55    }
  56 }
  57
  58 /**
  59  * At rendering-from-a-texture time, make sure that the texture object has a
  60  * miptree that can hold the entire texture based on
  61  * BaseLevel/MaxLevel/filtering, and copy in any texture images that are
  62  * stored in other miptrees.
  63  */
  64 GLuint
  65 intel_finalize_mipmap_tree(struct brw_context *brw, GLuint unit)
  66 {
  67    struct gl_context *ctx = &brw->ctx;
  68    struct gl_texture_object *tObj = ctx->Texture.Unit[unit]._Current;
  69    struct intel_texture_object *intelObj = intel_texture_object(tObj);
  70    struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
  71    GLuint face, i;
  72    GLuint nr_faces = 0;
  73    struct intel_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 true;
  79
  80    /* We know that this is true by now, and if it wasn't, we might have
  81     * mismatched level sizes and the copies would fail.
  82     */
  83    assert(intelObj->base._BaseComplete);
  84
  85    intel_update_max_level(intelObj, sampler);
  86
  87    /* What levels does this validated texture image require? */
  88    int validate_first_level = tObj->BaseLevel;
  89    int validate_last_level = intelObj->_MaxLevel;
  90
  91    /* Skip the loop over images in the common case of no images having
  92     * changed.  But if the GL_BASE_LEVEL or GL_MAX_LEVEL change to something we
  93     * haven't looked at, then we do need to look at those new images.
  94     */
  95    if (!intelObj->needs_validate &&
  96        validate_first_level >= intelObj->validated_first_level &&
  97        validate_last_level <= intelObj->validated_last_level) {
  98       return true;
  99    }
 100
 101    /* On recent generations, immutable textures should not get this far
 102     * -- they should have been created in a validated state, and nothing
 103     * can invalidate them.
 104     *
 105     * Unfortunately, this is not true on pre-Sandybridge hardware -- when
 106     * rendering into an immutable-format depth texture we may have to rebase
 107     * the rendered levels to meet alignment requirements.
 108     *
 109     * FINISHME: Avoid doing this.
 110     */
 111    assert(!tObj->Immutable || brw->gen < 6);
 112
 113    firstImage = intel_texture_image(tObj->Image[0][tObj->BaseLevel]);
 114
 115    /* Check tree can hold all active levels.  Check tree matches
 116     * target, imageFormat, etc.
 117     */
 118    if (intelObj->mt &&
 119        (!intel_miptree_match_image(intelObj->mt, &firstImage->base.Base) ||
 120         validate_first_level < intelObj->mt->first_level ||
 121         validate_last_level > intelObj->mt->last_level)) {
 122       intel_miptree_release(&intelObj->mt);
 123    }
 124
 125
 126    /* May need to create a new tree:
 127     */
 128    if (!intelObj->mt) {
 129       intel_miptree_get_dimensions_for_image(&firstImage->base.Base,
 130                                              &width, &height, &depth);
 131
 132       perf_debug("Creating new %s %dx%dx%d %d-level miptree to handle "
 133                  "finalized texture miptree.\n",
 134                  _mesa_get_format_name(firstImage->base.Base.TexFormat),
 135                  width, height, depth, validate_last_level + 1);
 136
 137       intelObj->mt = intel_miptree_create(brw,
 138                                           intelObj->base.Target,
 139                                           firstImage->base.Base.TexFormat,
 140                                           0, /* first_level */
 141                                           validate_last_level,
 142                                           width,
 143                                           height,
 144                                           depth,
 145                                           true,
 146                                           0 /* num_samples */,
 147                                           INTEL_MIPTREE_TILING_ANY,
 148                                           false);
 149       if (!intelObj->mt)
 150          return false;
 151    }
 152
 153    /* Pull in any images not in the object's tree:
 154     */
 155    nr_faces = _mesa_num_tex_faces(intelObj->base.Target);
 156    for (face = 0; face < nr_faces; face++) {
 157       for (i = validate_first_level; i <= validate_last_level; i++) {
 158          struct intel_texture_image *intelImage =
 159             intel_texture_image(intelObj->base.Image[face][i]);
 160          /* skip too small size mipmap */
 161          if (intelImage == NULL)
 162                  break;
 163
 164          if (intelObj->mt != intelImage->mt) {
 165             intel_miptree_copy_teximage(brw, intelImage, intelObj->mt,
 166                                         false /* invalidate */);
 167          }
 168
 169          /* After we're done, we'd better agree that our layout is
 170           * appropriate, or we'll end up hitting this function again on the
 171           * next draw
 172           */
 173          assert(intel_miptree_match_image(intelObj->mt, &intelImage->base.Base));
 174       }
 175    }
 176
 177    intelObj->validated_first_level = validate_first_level;
 178    intelObj->validated_last_level = validate_last_level;
 179    intelObj->_Format = intelObj->mt->format;
 180    intelObj->needs_validate = false;
 181
 182    return true;
 183 }