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_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 gl_texture_object *tObj,
  46                        struct gl_sampler_object *sampler)
  47 {
  48    struct intel_texture_object *intelObj = intel_texture_object(tObj);
  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 void
  67 intel_finalize_mipmap_tree(struct brw_context *brw,
  68                            struct gl_texture_object *tObj)
  69 {
  70    struct intel_texture_object *intelObj = intel_texture_object(tObj);
  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;
  79
  80    /* What levels does this validated texture image require? */
  81    int validate_first_level = tObj->BaseLevel;
  82    int validate_last_level = intelObj->_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 (!intelObj->needs_validate &&
  89        validate_first_level >= intelObj->validated_first_level &&
  90        validate_last_level <= intelObj->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.gen < 6);
 105
 106    firstImage = intel_texture_image(tObj->Image[0][tObj->BaseLevel]);
 107
 108    /* Check tree can hold all active levels.  Check tree matches
 109     * target, imageFormat, etc.
 110     */
 111    if (intelObj->mt &&
 112        (!intel_miptree_match_image(intelObj->mt, &firstImage->base.Base) ||
 113         validate_first_level < intelObj->mt->first_level ||
 114         validate_last_level > intelObj->mt->last_level)) {
 115       intel_miptree_release(&intelObj->mt);
 116    }
 117
 118
 119    /* May need to create a new tree:
 120     */
 121    if (!intelObj->mt) {
 122       intel_get_image_dims(&firstImage->base.Base, &width, &height, &depth);
 123
 124       perf_debug("Creating new %s %dx%dx%d %d-level miptree to handle "
 125                  "finalized texture miptree.\n",
 126                  _mesa_get_format_name(firstImage->base.Base.TexFormat),
 127                  width, height, depth, validate_last_level + 1);
 128
 129       intelObj->mt = intel_miptree_create(brw,
 130                                           intelObj->base.Target,
 131                                           firstImage->base.Base.TexFormat,
 132                                           0, /* first_level */
 133                                           validate_last_level,
 134                                           width,
 135                                           height,
 136                                           depth,
 137                                           1 /* num_samples */,
 138                                           MIPTREE_CREATE_BUSY);
 139       if (!intelObj->mt)
 140          return;
 141    }
 142
 143    /* Pull in any images not in the object's tree:
 144     */
 145    nr_faces = _mesa_num_tex_faces(intelObj->base.Target);
 146    for (face = 0; face < nr_faces; face++) {
 147       for (i = validate_first_level; i <= validate_last_level; i++) {
 148          struct intel_texture_image *intelImage =
 149             intel_texture_image(intelObj->base.Image[face][i]);
 150          /* skip too small size mipmap */
 151          if (intelImage == NULL)
 152                  break;
 153
 154          if (intelObj->mt != intelImage->mt)
 155             intel_miptree_copy_teximage(brw, intelImage, intelObj->mt);
 156
 157          /* After we're done, we'd better agree that our layout is
 158           * appropriate, or we'll end up hitting this function again on the
 159           * next draw
 160           */
 161          assert(intel_miptree_match_image(intelObj->mt, &intelImage->base.Base));
 162       }
 163    }
 164
 165    intelObj->validated_first_level = validate_first_level;
 166    intelObj->validated_last_level = validate_last_level;
 167    intelObj->_Format = firstImage->base.Base.TexFormat,
 168    intelObj->needs_validate = false;
 169 }
 170
 171 /**
 172  * Finalizes all textures, completing any rendering that needs to be done
 173  * to prepare them.
 174  */
 175 void
 176 brw_validate_textures(struct brw_context *brw)
 177 {
 178    struct gl_context *ctx = &brw->ctx;
 179    const int max_enabled_unit = ctx->Texture._MaxEnabledTexImageUnit;
 180
 181    for (int unit = 0; unit <= max_enabled_unit; unit++) {
 182       struct gl_texture_object *tex_obj = ctx->Texture.Unit[unit]._Current;
 183
 184       if (!tex_obj)
 185          continue;
 186
 187       struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
 188
 189       /* We know that this is true by now, and if it wasn't, we might have
 190        * mismatched level sizes and the copies would fail.
 191        */
 192       assert(tex_obj->_BaseComplete);
 193
 194       intel_update_max_level(tex_obj, sampler);
 195       intel_finalize_mipmap_tree(brw, tex_obj);
 196    }
 197 }