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

   1 #include "main/mtypes.h"
   2 #include "main/macros.h"
   3
   4 #include "intel_context.h"
   5 #include "intel_mipmap_tree.h"
   6 #include "intel_tex.h"
   7
   8 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
   9
  10 /**
  11  * Compute which mipmap levels that really need to be sent to the hardware.
  12  * This depends on the base image size, GL_TEXTURE_MIN_LOD,
  13  * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
  14  */
  15 static void
  16 intel_calculate_first_last_level(struct intel_context *intel,
  17                                  struct intel_texture_object *intelObj)
  18 {
  19    struct gl_texture_object *tObj = &intelObj->base;
  20    const struct gl_texture_image *const baseImage =
  21       tObj->Image[0][tObj->BaseLevel];
  22
  23    /* These must be signed values.  MinLod and MaxLod can be negative numbers,
  24     * and having firstLevel and lastLevel as signed prevents the need for
  25     * extra sign checks.
  26     */
  27    int firstLevel = tObj->BaseLevel;
  28    int lastLevel;
  29
  30    /* Yes, this looks overly complicated, but it's all needed.
  31     */
  32    if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
  33       /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
  34        */
  35       lastLevel = tObj->BaseLevel;
  36    } else {
  37       /* Min/max LOD are taken into account in sampler state.  We don't
  38        * want to re-layout textures just because clamping has been applied
  39        * since it means a bunch of blitting around and probably no memory
  40        * savings (since we have to keep the other levels around anyway).
  41        */
  42       lastLevel = MIN2(tObj->BaseLevel + baseImage->MaxLog2,
  43                        tObj->MaxLevel);
  44       /* need at least one level */
  45       lastLevel = MAX2(firstLevel, lastLevel);
  46    }
  47
  48    /* save these values */
  49    intelObj->firstLevel = firstLevel;
  50    intelObj->lastLevel = lastLevel;
  51 }
  52
  53 /**
  54  * Copies the image's contents at its level into the object's miptree,
  55  * and updates the image to point at the object's miptree.
  56  */
  57 static void
  58 copy_image_data_to_tree(struct intel_context *intel,
  59                         struct intel_texture_object *intelObj,
  60                         struct intel_texture_image *intelImage)
  61 {
  62    if (intelImage->mt) {
  63       /* Copy potentially with the blitter:
  64        */
  65       intel_miptree_image_copy(intel,
  66                                intelObj->mt,
  67                                intelImage->face,
  68                                intelImage->level, intelImage->mt);
  69
  70       intel_miptree_release(intel, &intelImage->mt);
  71    }
  72    else {
  73       assert(intelImage->base.Data != NULL);
  74
  75       /* More straightforward upload.
  76        */
  77       intel_miptree_image_data(intel,
  78                                intelObj->mt,
  79                                intelImage->face,
  80                                intelImage->level,
  81                                intelImage->base.Data,
  82                                intelImage->base.RowStride,
  83                                intelImage->base.RowStride *
  84                                intelImage->base.Height);
  85       _mesa_align_free(intelImage->base.Data);
  86       intelImage->base.Data = NULL;
  87    }
  88
  89    intel_miptree_reference(&intelImage->mt, intelObj->mt);
  90 }
  91
  92
  93 /*
  94  */
  95 GLuint
  96 intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
  97 {
  98    struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
  99    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 100    int comp_byte = 0;
 101    int cpp;
 102    GLuint face, i;
 103    GLuint nr_faces = 0;
 104    struct intel_texture_image *firstImage;
 105
 106    /* We know/require this is true by now:
 107     */
 108    assert(intelObj->base._Complete);
 109
 110    /* What levels must the tree include at a minimum?
 111     */
 112    intel_calculate_first_last_level(intel, intelObj);
 113    firstImage = intel_texture_image(tObj->Image[0][intelObj->firstLevel]);
 114
 115    /* Fallback case:
 116     */
 117    if (firstImage->base.Border) {
 118       if (intelObj->mt) {
 119          intel_miptree_release(intel, &intelObj->mt);
 120       }
 121       return GL_FALSE;
 122    }
 123
 124
 125    /* If both firstImage and intelObj have a tree which can contain
 126     * all active images, favour firstImage.  Note that because of the
 127     * completeness requirement, we know that the image dimensions
 128     * will match.
 129     */
 130    if (firstImage->mt &&
 131        firstImage->mt != intelObj->mt &&
 132        firstImage->mt->first_level <= intelObj->firstLevel &&
 133        firstImage->mt->last_level >= intelObj->lastLevel) {
 134
 135       if (intelObj->mt)
 136          intel_miptree_release(intel, &intelObj->mt);
 137
 138       intel_miptree_reference(&intelObj->mt, firstImage->mt);
 139    }
 140
 141    if (_mesa_is_format_compressed(firstImage->base.TexFormat)) {
 142       comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat);
 143       cpp = comp_byte;
 144    }
 145    else
 146       cpp = _mesa_get_format_bytes(firstImage->base.TexFormat);
 147
 148    /* Check tree can hold all active levels.  Check tree matches
 149     * target, imageFormat, etc.
 150     *
 151     * XXX: For some layouts (eg i945?), the test might have to be
 152     * first_level == firstLevel, as the tree isn't valid except at the
 153     * original start level.  Hope to get around this by
 154     * programming minLod, maxLod, baseLevel into the hardware and
 155     * leaving the tree alone.
 156     */
 157    if (intelObj->mt &&
 158        (intelObj->mt->target != intelObj->base.Target ||
 159         intelObj->mt->internal_format != firstImage->base.InternalFormat ||
 160         intelObj->mt->first_level != intelObj->firstLevel ||
 161         intelObj->mt->last_level != intelObj->lastLevel ||
 162         intelObj->mt->width0 != firstImage->base.Width ||
 163         intelObj->mt->height0 != firstImage->base.Height ||
 164         intelObj->mt->depth0 != firstImage->base.Depth ||
 165         intelObj->mt->cpp != cpp ||
 166         intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
 167       intel_miptree_release(intel, &intelObj->mt);
 168    }
 169
 170
 171    /* May need to create a new tree:
 172     */
 173    if (!intelObj->mt) {
 174       intelObj->mt = intel_miptree_create(intel,
 175                                           intelObj->base.Target,
 176                                           firstImage->base._BaseFormat,
 177                                           firstImage->base.InternalFormat,
 178                                           intelObj->firstLevel,
 179                                           intelObj->lastLevel,
 180                                           firstImage->base.Width,
 181                                           firstImage->base.Height,
 182                                           firstImage->base.Depth,
 183                                           cpp,
 184                                           comp_byte,
 185                                           GL_TRUE);
 186    }
 187
 188    /* Pull in any images not in the object's tree:
 189     */
 190    nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 191    for (face = 0; face < nr_faces; face++) {
 192       for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
 193          struct intel_texture_image *intelImage =
 194             intel_texture_image(intelObj->base.Image[face][i]);
 195
 196          /* Need to import images in main memory or held in other trees.
 197           * If it's a render target, then its data isn't needed to be in
 198           * the object tree (otherwise we'd be FBO incomplete), and we need
 199           * to keep track of the image's MT as needing to be pulled in still,
 200           * or we'll lose the rendering that's done to it.
 201           */
 202          if (intelObj->mt != intelImage->mt &&
 203              !intelImage->used_as_render_target) {
 204             copy_image_data_to_tree(intel, intelObj, intelImage);
 205          }
 206       }
 207    }
 208
 209    return GL_TRUE;
 210 }
 211
 212 void
 213 intel_tex_map_level_images(struct intel_context *intel,
 214                            struct intel_texture_object *intelObj,
 215                            int level)
 216 {
 217    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 218    GLuint face;
 219
 220    for (face = 0; face < nr_faces; face++) {
 221       struct intel_texture_image *intelImage =
 222          intel_texture_image(intelObj->base.Image[face][level]);
 223
 224       if (intelImage && intelImage->mt) {
 225          intelImage->base.Data =
 226             intel_miptree_image_map(intel,
 227                                     intelImage->mt,
 228                                     intelImage->face,
 229                                     intelImage->level,
 230                                     &intelImage->base.RowStride,
 231                                     intelImage->base.ImageOffsets);
 232          /* convert stride to texels, not bytes */
 233          intelImage->base.RowStride /= intelImage->mt->cpp;
 234          /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
 235       }
 236    }
 237 }
 238
 239 void
 240 intel_tex_unmap_level_images(struct intel_context *intel,
 241                              struct intel_texture_object *intelObj,
 242                              int level)
 243 {
 244    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 245    GLuint face;
 246
 247    for (face = 0; face < nr_faces; face++) {
 248       struct intel_texture_image *intelImage =
 249          intel_texture_image(intelObj->base.Image[face][level]);
 250
 251       if (intelImage && intelImage->mt) {
 252          intel_miptree_image_unmap(intel, intelImage->mt);
 253          intelImage->base.Data = NULL;
 254       }
 255    }
 256 }
 257
 258 void
 259 intel_tex_map_images(struct intel_context *intel,
 260                      struct intel_texture_object *intelObj)
 261 {
 262    int i;
 263
 264    DBG("%s\n", __FUNCTION__);
 265
 266    for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
 267       intel_tex_map_level_images(intel, intelObj, i);
 268 }
 269
 270 void
 271 intel_tex_unmap_images(struct intel_context *intel,
 272                        struct intel_texture_object *intelObj)
 273 {
 274    int i;
 275
 276    for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
 277       intel_tex_unmap_level_images(intel, intelObj, i);
 278 }