src/mesa/drivers/dri/i915tex/intel_tex_validate.c

   1 #include "mtypes.h"
   2 #include "macros.h"
   3
   4 #include "intel_context.h"
   5 #include "intel_batchbuffer.h"
   6 #include "intel_mipmap_tree.h"
   7 #include "intel_tex.h"
   8
   9 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  10
  11 /**
  12  * Compute which mipmap levels that really need to be sent to the hardware.
  13  * This depends on the base image size, GL_TEXTURE_MIN_LOD,
  14  * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
  15  */
  16 static void
  17 intel_calculate_first_last_level(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;
  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          firstLevel = lastLevel = tObj->BaseLevel;
  41       }
  42       else {
  43          firstLevel = tObj->BaseLevel + (GLint) (tObj->MinLod + 0.5);
  44          firstLevel = MAX2(firstLevel, tObj->BaseLevel);
  45          lastLevel = tObj->BaseLevel + (GLint) (tObj->MaxLod + 0.5);
  46          lastLevel = MAX2(lastLevel, tObj->BaseLevel);
  47          lastLevel = MIN2(lastLevel, tObj->BaseLevel + baseImage->MaxLog2);
  48          lastLevel = MIN2(lastLevel, tObj->MaxLevel);
  49          lastLevel = MAX2(firstLevel, lastLevel);       /* need at least one level */
  50       }
  51       break;
  52    case GL_TEXTURE_RECTANGLE_NV:
  53    case GL_TEXTURE_4D_SGIS:
  54       firstLevel = lastLevel = 0;
  55       break;
  56    default:
  57       return;
  58    }
  59
  60    /* save these values */
  61    intelObj->firstLevel = firstLevel;
  62    intelObj->lastLevel = lastLevel;
  63 }
  64
  65 static void
  66 copy_image_data_to_tree(struct intel_context *intel,
  67                         struct intel_texture_object *intelObj,
  68                         struct intel_texture_image *intelImage)
  69 {
  70    if (intelImage->mt) {
  71       /* Copy potentially with the blitter:
  72        */
  73       intel_miptree_image_copy(intel,
  74                                intelObj->mt,
  75                                intelImage->face,
  76                                intelImage->level, intelImage->mt);
  77
  78       intel_miptree_release(intel, &intelImage->mt);
  79    }
  80    else {
  81       assert(intelImage->base.Data != NULL);
  82
  83       /* More straightforward upload.
  84        */
  85       intel_miptree_image_data(intel,
  86                                intelObj->mt,
  87                                intelImage->face,
  88                                intelImage->level,
  89                                intelImage->base.Data,
  90                                intelImage->base.RowStride,
  91                                intelImage->base.RowStride *
  92                                intelImage->base.Height);
  93       _mesa_align_free(intelImage->base.Data);
  94       intelImage->base.Data = NULL;
  95    }
  96
  97    intel_miptree_reference(&intelImage->mt, intelObj->mt);
  98 }
  99
 100
 101 /*
 102  */
 103 GLuint
 104 intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
 105 {
 106    struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
 107    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 108
 109    GLuint face, i;
 110    GLuint nr_faces = 0;
 111    struct intel_texture_image *firstImage;
 112
 113    GLboolean need_flush = GL_FALSE;
 114
 115    /* We know/require this is true by now:
 116     */
 117    assert(intelObj->base.Complete);
 118
 119    /* What levels must the tree include at a minimum?
 120     */
 121    intel_calculate_first_last_level(intelObj);
 122    firstImage =
 123       intel_texture_image(intelObj->base.Image[0][intelObj->firstLevel]);
 124
 125    /* Fallback case:
 126     */
 127    if (firstImage->base.Border) {
 128       if (intelObj->mt) {
 129          intel_miptree_release(intel, &intelObj->mt);
 130       }
 131       return GL_FALSE;
 132    }
 133
 134
 135    /* If both firstImage and intelObj have a tree which can contain
 136     * all active images, favour firstImage.  Note that because of the
 137     * completeness requirement, we know that the image dimensions
 138     * will match.
 139     */
 140    if (firstImage->mt &&
 141        firstImage->mt != intelObj->mt &&
 142        firstImage->mt->first_level <= intelObj->firstLevel &&
 143        firstImage->mt->last_level >= intelObj->lastLevel) {
 144
 145       if (intelObj->mt)
 146          intel_miptree_release(intel, &intelObj->mt);
 147
 148       intel_miptree_reference(&intelObj->mt, firstImage->mt);
 149    }
 150
 151    /* Check tree can hold all active levels.  Check tree matches
 152     * target, imageFormat, etc.
 153     *
 154     * XXX: For some layouts (eg i945?), the test might have to be
 155     * first_level == firstLevel, as the tree isn't valid except at the
 156     * original start level.  Hope to get around this by
 157     * programming minLod, maxLod, baseLevel into the hardware and
 158     * leaving the tree alone.
 159     */
 160    if (intelObj->mt &&
 161        (intelObj->mt->target != intelObj->base.Target ||
 162         intelObj->mt->internal_format != firstImage->base.InternalFormat ||
 163         intelObj->mt->first_level != intelObj->firstLevel ||
 164         intelObj->mt->last_level != intelObj->lastLevel ||
 165         intelObj->mt->width0 != firstImage->base.Width ||
 166         intelObj->mt->height0 != firstImage->base.Height ||
 167         intelObj->mt->depth0 != firstImage->base.Depth ||
 168         intelObj->mt->cpp != firstImage->base.TexFormat->TexelBytes ||
 169         intelObj->mt->compressed != firstImage->base.IsCompressed)) {
 170       intel_miptree_release(intel, &intelObj->mt);
 171    }
 172
 173
 174    /* May need to create a new tree:
 175     */
 176    if (!intelObj->mt) {
 177       int comp_byte = 0;
 178
 179       if (firstImage->base.IsCompressed)
 180          comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat->MesaFormat);
 181       intelObj->mt = intel_miptree_create(intel,
 182                                           intelObj->base.Target,
 183                                           firstImage->base.InternalFormat,
 184                                           intelObj->firstLevel,
 185                                           intelObj->lastLevel,
 186                                           firstImage->base.Width,
 187                                           firstImage->base.Height,
 188                                           firstImage->base.Depth,
 189                                           firstImage->base.TexFormat->
 190                                           TexelBytes,
 191                                           comp_byte);
 192    }
 193
 194    /* Pull in any images not in the object's tree:
 195     */
 196    nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 197    for (face = 0; face < nr_faces; face++) {
 198       for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
 199          struct intel_texture_image *intelImage =
 200             intel_texture_image(intelObj->base.Image[face][i]);
 201
 202          /* Need to import images in main memory or held in other trees.
 203           */
 204          if (intelObj->mt != intelImage->mt) {
 205             copy_image_data_to_tree(intel, intelObj, intelImage);
 206             need_flush = GL_TRUE;
 207          }
 208       }
 209    }
 210
 211    if (need_flush)
 212       intel_batchbuffer_flush(intel->batch);
 213
 214    return GL_TRUE;
 215 }
 216
 217
 218
 219 void
 220 intel_tex_map_images(struct intel_context *intel,
 221                      struct intel_texture_object *intelObj)
 222 {
 223    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 224    GLuint face, i;
 225
 226    DBG("%s\n", __FUNCTION__);
 227
 228    for (face = 0; face < nr_faces; face++) {
 229       for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
 230          struct intel_texture_image *intelImage =
 231             intel_texture_image(intelObj->base.Image[face][i]);
 232
 233          if (intelImage->mt) {
 234             intelImage->base.Data =
 235                intel_miptree_image_map(intel,
 236                                        intelImage->mt,
 237                                        intelImage->face,
 238                                        intelImage->level,
 239                                        &intelImage->base.RowStride,
 240                                        intelImage->base.ImageOffsets);
 241             /* convert stride to texels, not bytes */
 242             intelImage->base.RowStride /= intelImage->mt->cpp;
 243 /*             intelImage->base.ImageStride /= intelImage->mt->cpp; */
 244          }
 245       }
 246    }
 247 }
 248
 249
 250
 251 void
 252 intel_tex_unmap_images(struct intel_context *intel,
 253                        struct intel_texture_object *intelObj)
 254 {
 255    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 256    GLuint face, i;
 257
 258    for (face = 0; face < nr_faces; face++) {
 259       for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
 260          struct intel_texture_image *intelImage =
 261             intel_texture_image(intelObj->base.Image[face][i]);
 262
 263          if (intelImage->mt) {
 264             intel_miptree_image_unmap(intel, intelImage->mt);
 265             intelImage->base.Data = NULL;
 266          }
 267       }
 268    }
 269 }