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    switch (tObj->Target) {
  33    case GL_TEXTURE_1D:
  34    case GL_TEXTURE_2D:
  35    case GL_TEXTURE_3D:
  36    case GL_TEXTURE_CUBE_MAP:
  37       if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
  38          /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
  39           */
  40          lastLevel = tObj->BaseLevel;
  41       }
  42       else {
  43          if (intel->gen == 2) {
  44             firstLevel += (GLint) (tObj->MinLod + 0.5);
  45             firstLevel = MAX2(firstLevel, tObj->BaseLevel);
  46             firstLevel = MIN2(firstLevel, tObj->BaseLevel + baseImage->MaxLog2);
  47             lastLevel = tObj->BaseLevel + (GLint) (tObj->MaxLod + 0.5);
  48             lastLevel = MAX2(lastLevel, tObj->BaseLevel);
  49             lastLevel = MIN2(lastLevel, tObj->BaseLevel + baseImage->MaxLog2);
  50             lastLevel = MIN2(lastLevel, tObj->MaxLevel);
  51             lastLevel = MAX2(firstLevel, lastLevel);       /* need at least one level */
  52          } else {
  53             /* Min/max LOD are taken into account in sampler state.  We don't
  54              * want to re-layout textures just because clamping has been applied
  55              * since it means a bunch of blitting around and probably no memory
  56              * savings (since we have to keep the other levels around anyway).
  57              */
  58             lastLevel = MIN2(tObj->BaseLevel + baseImage->MaxLog2,
  59                              tObj->MaxLevel);
  60             /* need at least one level */
  61             lastLevel = MAX2(firstLevel, lastLevel);
  62          }
  63       }
  64       break;
  65    case GL_TEXTURE_RECTANGLE_NV:
  66       lastLevel = 0;
  67       break;
  68    default:
  69       return;
  70    }
  71
  72    /* save these values */
  73    intelObj->firstLevel = firstLevel;
  74    intelObj->lastLevel = lastLevel;
  75 }
  76
  77 /**
  78  * Copies the image's contents at its level into the object's miptree,
  79  * and updates the image to point at the object's miptree.
  80  */
  81 static void
  82 copy_image_data_to_tree(struct intel_context *intel,
  83                         struct intel_texture_object *intelObj,
  84                         struct intel_texture_image *intelImage)
  85 {
  86    if (intelImage->mt) {
  87       /* Copy potentially with the blitter:
  88        */
  89       intel_miptree_image_copy(intel,
  90                                intelObj->mt,
  91                                intelImage->face,
  92                                intelImage->level, intelImage->mt);
  93
  94       intel_miptree_release(intel, &intelImage->mt);
  95    }
  96    else {
  97       assert(intelImage->base.Data != NULL);
  98
  99       /* More straightforward upload.
 100        */
 101       intel_miptree_image_data(intel,
 102                                intelObj->mt,
 103                                intelImage->face,
 104                                intelImage->level,
 105                                intelImage->base.Data,
 106                                intelImage->base.RowStride,
 107                                intelImage->base.RowStride *
 108                                intelImage->base.Height);
 109       _mesa_align_free(intelImage->base.Data);
 110       intelImage->base.Data = NULL;
 111    }
 112
 113    intel_miptree_reference(&intelImage->mt, intelObj->mt);
 114 }
 115
 116
 117 /*
 118  */
 119 GLuint
 120 intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
 121 {
 122    struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
 123    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 124    int comp_byte = 0;
 125    int cpp;
 126    GLuint face, i;
 127    GLuint nr_faces = 0;
 128    struct intel_texture_image *firstImage;
 129
 130    /* We know/require this is true by now:
 131     */
 132    assert(intelObj->base._Complete);
 133
 134    /* What levels must the tree include at a minimum?
 135     */
 136    intel_calculate_first_last_level(intel, intelObj);
 137    firstImage = intel_texture_image(tObj->Image[0][intelObj->firstLevel]);
 138
 139    /* Fallback case:
 140     */
 141    if (firstImage->base.Border) {
 142       if (intelObj->mt) {
 143          intel_miptree_release(intel, &intelObj->mt);
 144       }
 145       return GL_FALSE;
 146    }
 147
 148
 149    /* If both firstImage and intelObj have a tree which can contain
 150     * all active images, favour firstImage.  Note that because of the
 151     * completeness requirement, we know that the image dimensions
 152     * will match.
 153     */
 154    if (firstImage->mt &&
 155        firstImage->mt != intelObj->mt &&
 156        firstImage->mt->first_level <= intelObj->firstLevel &&
 157        firstImage->mt->last_level >= intelObj->lastLevel) {
 158
 159       if (intelObj->mt)
 160          intel_miptree_release(intel, &intelObj->mt);
 161
 162       intel_miptree_reference(&intelObj->mt, firstImage->mt);
 163    }
 164
 165    if (_mesa_is_format_compressed(firstImage->base.TexFormat)) {
 166       comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat);
 167       cpp = comp_byte;
 168    }
 169    else
 170       cpp = _mesa_get_format_bytes(firstImage->base.TexFormat);
 171
 172    /* Check tree can hold all active levels.  Check tree matches
 173     * target, imageFormat, etc.
 174     *
 175     * XXX: For some layouts (eg i945?), the test might have to be
 176     * first_level == firstLevel, as the tree isn't valid except at the
 177     * original start level.  Hope to get around this by
 178     * programming minLod, maxLod, baseLevel into the hardware and
 179     * leaving the tree alone.
 180     */
 181    if (intelObj->mt &&
 182        (intelObj->mt->target != intelObj->base.Target ||
 183         intelObj->mt->internal_format != firstImage->base.InternalFormat ||
 184         intelObj->mt->first_level != intelObj->firstLevel ||
 185         intelObj->mt->last_level != intelObj->lastLevel ||
 186         intelObj->mt->width0 != firstImage->base.Width ||
 187         intelObj->mt->height0 != firstImage->base.Height ||
 188         intelObj->mt->depth0 != firstImage->base.Depth ||
 189         intelObj->mt->cpp != cpp ||
 190         intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
 191       intel_miptree_release(intel, &intelObj->mt);
 192    }
 193
 194
 195    /* May need to create a new tree:
 196     */
 197    if (!intelObj->mt) {
 198       intelObj->mt = intel_miptree_create(intel,
 199                                           intelObj->base.Target,
 200                                           firstImage->base._BaseFormat,
 201                                           firstImage->base.InternalFormat,
 202                                           intelObj->firstLevel,
 203                                           intelObj->lastLevel,
 204                                           firstImage->base.Width,
 205                                           firstImage->base.Height,
 206                                           firstImage->base.Depth,
 207                                           cpp,
 208                                           comp_byte,
 209                                           GL_TRUE);
 210    }
 211
 212    /* Pull in any images not in the object's tree:
 213     */
 214    nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 215    for (face = 0; face < nr_faces; face++) {
 216       for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
 217          struct intel_texture_image *intelImage =
 218             intel_texture_image(intelObj->base.Image[face][i]);
 219
 220          /* Need to import images in main memory or held in other trees.
 221           * If it's a render target, then its data isn't needed to be in
 222           * the object tree (otherwise we'd be FBO incomplete), and we need
 223           * to keep track of the image's MT as needing to be pulled in still,
 224           * or we'll lose the rendering that's done to it.
 225           */
 226          if (intelObj->mt != intelImage->mt &&
 227              !intelImage->used_as_render_target) {
 228             copy_image_data_to_tree(intel, intelObj, intelImage);
 229          }
 230       }
 231    }
 232
 233    return GL_TRUE;
 234 }
 235
 236 void
 237 intel_tex_map_level_images(struct intel_context *intel,
 238                            struct intel_texture_object *intelObj,
 239                            int level)
 240 {
 241    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 242    GLuint face;
 243
 244    for (face = 0; face < nr_faces; face++) {
 245       struct intel_texture_image *intelImage =
 246          intel_texture_image(intelObj->base.Image[face][level]);
 247
 248       if (intelImage && intelImage->mt) {
 249          intelImage->base.Data =
 250             intel_miptree_image_map(intel,
 251                                     intelImage->mt,
 252                                     intelImage->face,
 253                                     intelImage->level,
 254                                     &intelImage->base.RowStride,
 255                                     intelImage->base.ImageOffsets);
 256          /* convert stride to texels, not bytes */
 257          intelImage->base.RowStride /= intelImage->mt->cpp;
 258          /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
 259       }
 260    }
 261 }
 262
 263 void
 264 intel_tex_unmap_level_images(struct intel_context *intel,
 265                              struct intel_texture_object *intelObj,
 266                              int level)
 267 {
 268    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 269    GLuint face;
 270
 271    for (face = 0; face < nr_faces; face++) {
 272       struct intel_texture_image *intelImage =
 273          intel_texture_image(intelObj->base.Image[face][level]);
 274
 275       if (intelImage && intelImage->mt) {
 276          intel_miptree_image_unmap(intel, intelImage->mt);
 277          intelImage->base.Data = NULL;
 278       }
 279    }
 280 }
 281
 282 void
 283 intel_tex_map_images(struct intel_context *intel,
 284                      struct intel_texture_object *intelObj)
 285 {
 286    int i;
 287
 288    DBG("%s\n", __FUNCTION__);
 289
 290    for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
 291       intel_tex_map_level_images(intel, intelObj, i);
 292 }
 293
 294 void
 295 intel_tex_unmap_images(struct intel_context *intel,
 296                        struct intel_texture_object *intelObj)
 297 {
 298    int i;
 299
 300    for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
 301       intel_tex_unmap_level_images(intel, intelObj, i);
 302 }