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