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/teximage.h"
  28 #include "main/texobj.h"
  29
  30 #include "brw_context.h"
  31 #include "intel_mipmap_tree.h"
  32 #include "intel_blit.h"
  33 #include "intel_tex.h"
  34
  35 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  36
  37 /**
  38  * Sets our driver-specific variant of tObj->_MaxLevel for later surface state
  39  * upload.
  40  *
  41  * If we're only ensuring that there is storage for the first miplevel of a
  42  * texture, then in texture setup we're going to have to make sure we don't
  43  * allow sampling beyond level 0.
  44  */
  45 static void
  46 intel_update_max_level(struct intel_texture_object *intelObj,
  47                        struct gl_sampler_object *sampler)
  48 {
  49    struct gl_texture_object *tObj = &intelObj->base;
  50
  51    if (!tObj->_MipmapComplete ||
  52        (tObj->_RenderToTexture &&
  53         (sampler->MinFilter == GL_NEAREST ||
  54          sampler->MinFilter == GL_LINEAR))) {
  55       intelObj->_MaxLevel = tObj->BaseLevel;
  56    } else {
  57       intelObj->_MaxLevel = tObj->_MaxLevel;
  58    }
  59 }
  60
  61 /**
  62  * At rendering-from-a-texture time, make sure that the texture object has a
  63  * miptree that can hold the entire texture based on
  64  * BaseLevel/MaxLevel/filtering, and copy in any texture images that are
  65  * stored in other miptrees.
  66  */
  67 void
  68 intel_finalize_mipmap_tree(struct brw_context *brw, GLuint unit)
  69 {
  70    const struct gen_device_info *devinfo = &brw->screen->devinfo;
  71    struct gl_context *ctx = &brw->ctx;
  72    struct gl_texture_object *tObj = ctx->Texture.Unit[unit]._Current;
  73    struct intel_texture_object *intelObj = intel_texture_object(tObj);
  74    struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
  75    GLuint face, i;
  76    GLuint nr_faces = 0;
  77    struct intel_texture_image *firstImage;
  78    int width, height, depth;
  79
  80    /* TBOs require no validation -- they always just point to their BO. */
  81    if (tObj->Target == GL_TEXTURE_BUFFER)
  82       return;
  83
  84    /* We know that this is true by now, and if it wasn't, we might have
  85     * mismatched level sizes and the copies would fail.
  86     */
  87    assert(intelObj->base._BaseComplete);
  88
  89    intel_update_max_level(intelObj, sampler);
  90
  91    /* What levels does this validated texture image require? */
  92    int validate_first_level = tObj->BaseLevel;
  93    int validate_last_level = intelObj->_MaxLevel;
  94
  95    /* Skip the loop over images in the common case of no images having
  96     * changed.  But if the GL_BASE_LEVEL or GL_MAX_LEVEL change to something we
  97     * haven't looked at, then we do need to look at those new images.
  98     */
  99    if (!intelObj->needs_validate &&
 100        validate_first_level >= intelObj->validated_first_level &&
 101        validate_last_level <= intelObj->validated_last_level) {
 102       return;
 103    }
 104
 105    /* On recent generations, immutable textures should not get this far
 106     * -- they should have been created in a validated state, and nothing
 107     * can invalidate them.
 108     *
 109     * Unfortunately, this is not true on pre-Sandybridge hardware -- when
 110     * rendering into an immutable-format depth texture we may have to rebase
 111     * the rendered levels to meet alignment requirements.
 112     *
 113     * FINISHME: Avoid doing this.
 114     */
 115    assert(!tObj->Immutable || devinfo->gen < 6);
 116
 117    firstImage = intel_texture_image(tObj->Image[0][tObj->BaseLevel]);
 118
 119    /* Check tree can hold all active levels.  Check tree matches
 120     * target, imageFormat, etc.
 121     */
 122    if (intelObj->mt &&
 123        (!intel_miptree_match_image(intelObj->mt, &firstImage->base.Base) ||
 124         validate_first_level < intelObj->mt->first_level ||
 125         validate_last_level > intelObj->mt->last_level)) {
 126       intel_miptree_release(&intelObj->mt);
 127    }
 128
 129
 130    /* May need to create a new tree:
 131     */
 132    if (!intelObj->mt) {
 133       intel_get_image_dims(&firstImage->base.Base, &width, &height, &depth);
 134
 135       perf_debug("Creating new %s %dx%dx%d %d-level miptree to handle "
 136                  "finalized texture miptree.\n",
 137                  _mesa_get_format_name(firstImage->base.Base.TexFormat),
 138                  width, height, depth, validate_last_level + 1);
 139
 140       intelObj->mt = intel_miptree_create(brw,
 141                                           intelObj->base.Target,
 142                                           firstImage->base.Base.TexFormat,
 143                                           0, /* first_level */
 144                                           validate_last_level,
 145                                           width,
 146                                           height,
 147                                           depth,
 148                                           1 /* num_samples */,
 149                                           MIPTREE_CREATE_BUSY);
 150       if (!intelObj->mt)
 151          return;
 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
 184 /**
 185  * Finalizes all textures, completing any rendering that needs to be done
 186  * to prepare them.
 187  */
 188 void
 189 brw_validate_textures(struct brw_context *brw)
 190 {
 191    struct gl_context *ctx = &brw->ctx;
 192    const int max_enabled_unit = ctx->Texture._MaxEnabledTexImageUnit;
 193
 194    for (int unit = 0; unit <= max_enabled_unit; unit++) {
 195       struct gl_texture_unit *tex_unit = &ctx->Texture.Unit[unit];
 196
 197       if (tex_unit->_Current) {
 198          intel_finalize_mipmap_tree(brw, unit);
 199       }
 200    }
 201 }