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 (!tObj->_MipmapComplete ||
  51        (tObj->_RenderToTexture &&
  52         (sampler->MinFilter == GL_NEAREST ||
  53          sampler->MinFilter == GL_LINEAR))) {
  54       intelObj->_MaxLevel = tObj->BaseLevel;
  55    } else {
  56       intelObj->_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  */
  66 GLuint
  67 intel_finalize_mipmap_tree(struct brw_context *brw, GLuint unit)
  68 {
  69    struct gl_context *ctx = &brw->ctx;
  70    struct gl_texture_object *tObj = ctx->Texture.Unit[unit]._Current;
  71    struct intel_texture_object *intelObj = intel_texture_object(tObj);
  72    struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
  73    GLuint face, i;
  74    GLuint nr_faces = 0;
  75    struct intel_texture_image *firstImage;
  76    int width, height, depth;
  77
  78    /* TBOs require no validation -- they always just point to their BO. */
  79    if (tObj->Target == GL_TEXTURE_BUFFER)
  80       return true;
  81
  82    /* We know that this is true by now, and if it wasn't, we might have
  83     * mismatched level sizes and the copies would fail.
  84     */
  85    assert(intelObj->base._BaseComplete);
  86
  87    intel_update_max_level(intelObj, sampler);
  88
  89    /* What levels does this validated texture image require? */
  90    int validate_first_level = tObj->BaseLevel;
  91    int validate_last_level = intelObj->_MaxLevel;
  92
  93    /* Skip the loop over images in the common case of no images having
  94     * changed.  But if the GL_BASE_LEVEL or GL_MAX_LEVEL change to something we
  95     * haven't looked at, then we do need to look at those new images.
  96     */
  97    if (!intelObj->needs_validate &&
  98        validate_first_level >= intelObj->validated_first_level &&
  99        validate_last_level <= intelObj->validated_last_level) {
 100       return true;
 101    }
 102
 103    /* On recent generations, immutable textures should not get this far
 104     * -- they should have been created in a validated state, and nothing
 105     * can invalidate them.
 106     *
 107     * Unfortunately, this is not true on pre-Sandybridge hardware -- when
 108     * rendering into an immutable-format depth texture we may have to rebase
 109     * the rendered levels to meet alignment requirements.
 110     *
 111     * FINISHME: Avoid doing this.
 112     */
 113    assert(!tObj->Immutable || brw->gen < 6);
 114
 115    firstImage = intel_texture_image(tObj->Image[0][tObj->BaseLevel]);
 116
 117    /* Check tree can hold all active levels.  Check tree matches
 118     * target, imageFormat, etc.
 119     */
 120    if (intelObj->mt &&
 121        (!intel_miptree_match_image(intelObj->mt, &firstImage->base.Base) ||
 122         validate_first_level < intelObj->mt->first_level ||
 123         validate_last_level > intelObj->mt->last_level)) {
 124       intel_miptree_release(&intelObj->mt);
 125    }
 126
 127
 128    /* May need to create a new tree:
 129     */
 130    if (!intelObj->mt) {
 131       intel_miptree_get_dimensions_for_image(&firstImage->base.Base,
 132                                              &width, &height, &depth);
 133
 134       perf_debug("Creating new %s %dx%dx%d %d-level miptree to handle "
 135                  "finalized texture miptree.\n",
 136                  _mesa_get_format_name(firstImage->base.Base.TexFormat),
 137                  width, height, depth, validate_last_level + 1);
 138
 139       intelObj->mt = intel_miptree_create(brw,
 140                                           intelObj->base.Target,
 141                                           firstImage->base.Base.TexFormat,
 142                                           0, /* first_level */
 143                                           validate_last_level,
 144                                           width,
 145                                           height,
 146                                           depth,
 147                                           0 /* num_samples */,
 148                                           INTEL_MIPTREE_TILING_ANY,
 149                                           MIPTREE_LAYOUT_ACCELERATED_UPLOAD);
 150       if (!intelObj->mt)
 151          return false;
 152    }
 153
 154    /* Pull in any images not in the object's tree:
 155     */
 156    nr_faces = _mesa_num_tex_faces(intelObj->base.Target);
 157    for (face = 0; face < nr_faces; face++) {
 158       for (i = validate_first_level; i <= validate_last_level; i++) {
 159          struct intel_texture_image *intelImage =
 160             intel_texture_image(intelObj->base.Image[face][i]);
 161          /* skip too small size mipmap */
 162          if (intelImage == NULL)
 163                  break;
 164
 165          if (intelObj->mt != intelImage->mt) {
 166             intel_miptree_copy_teximage(brw, intelImage, intelObj->mt,
 167                                         false /* invalidate */);
 168          }
 169
 170          /* After we're done, we'd better agree that our layout is
 171           * appropriate, or we'll end up hitting this function again on the
 172           * next draw
 173           */
 174          assert(intel_miptree_match_image(intelObj->mt, &intelImage->base.Base));
 175       }
 176    }
 177
 178    intelObj->validated_first_level = validate_first_level;
 179    intelObj->validated_last_level = validate_last_level;
 180    intelObj->_Format = intelObj->mt->format;
 181    intelObj->needs_validate = false;
 182
 183    return true;
 184 }