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_batchbuffer.h"
   6 #include "intel_mipmap_tree.h"
   7 #include "intel_tex.h"
   8 #include "intel_chipset.h"
   9
  10 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  11
  12 /**
  13  * Compute which mipmap levels that really need to be sent to the hardware.
  14  * This depends on the base image size, GL_TEXTURE_MIN_LOD,
  15  * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
  16  */
  17 static void
  18 intel_calculate_first_last_level(struct intel_context *intel,
  19                                  struct intel_texture_object *intelObj)
  20 {
  21    struct gl_texture_object *tObj = &intelObj->base;
  22    const struct gl_texture_image *const baseImage =
  23       tObj->Image[0][tObj->BaseLevel];
  24
  25    /* These must be signed values.  MinLod and MaxLod can be negative numbers,
  26     * and having firstLevel and lastLevel as signed prevents the need for
  27     * extra sign checks.
  28     */
  29    int firstLevel;
  30    int lastLevel;
  31
  32    /* Yes, this looks overly complicated, but it's all needed.
  33     */
  34    switch (tObj->Target) {
  35    case GL_TEXTURE_1D:
  36    case GL_TEXTURE_2D:
  37    case GL_TEXTURE_3D:
  38    case GL_TEXTURE_CUBE_MAP:
  39       if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
  40          /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
  41           */
  42          firstLevel = lastLevel = tObj->BaseLevel;
  43       }
  44       else {
  45          if (!IS_9XX(intel->intelScreen->deviceID)) {
  46             firstLevel = tObj->BaseLevel + (GLint) (tObj->MinLod + 0.5);
  47             firstLevel = MAX2(firstLevel, tObj->BaseLevel);
  48             firstLevel = MIN2(firstLevel, tObj->BaseLevel + baseImage->MaxLog2);
  49             lastLevel = tObj->BaseLevel + (GLint) (tObj->MaxLod + 0.5);
  50             lastLevel = MAX2(lastLevel, tObj->BaseLevel);
  51             lastLevel = MIN2(lastLevel, tObj->BaseLevel + baseImage->MaxLog2);
  52             lastLevel = MIN2(lastLevel, tObj->MaxLevel);
  53             lastLevel = MAX2(firstLevel, lastLevel);       /* need at least one level */
  54          } else {
  55             /* Min/max LOD are taken into account in sampler state.  We don't
  56              * want to re-layout textures just because clamping has been applied
  57              * since it means a bunch of blitting around and probably no memory
  58              * savings (since we have to keep the other levels around anyway).
  59              */
  60             firstLevel = tObj->BaseLevel;
  61             lastLevel = MIN2(tObj->BaseLevel + baseImage->MaxLog2,
  62                              tObj->MaxLevel);
  63             /* need at least one level */
  64             lastLevel = MAX2(firstLevel, lastLevel);
  65          }
  66       }
  67       break;
  68    case GL_TEXTURE_RECTANGLE_NV:
  69    case GL_TEXTURE_4D_SGIS:
  70       firstLevel = lastLevel = 0;
  71       break;
  72    default:
  73       return;
  74    }
  75
  76    /* save these values */
  77    intelObj->firstLevel = firstLevel;
  78    intelObj->lastLevel = lastLevel;
  79 }
  80
  81 /**
  82  * Copies the image's contents at its level into the object's miptree,
  83  * and updates the image to point at the object's miptree.
  84  */
  85 static void
  86 copy_image_data_to_tree(struct intel_context *intel,
  87                         struct intel_texture_object *intelObj,
  88                         struct intel_texture_image *intelImage)
  89 {
  90    if (intelImage->mt) {
  91       /* Copy potentially with the blitter:
  92        */
  93       intel_miptree_image_copy(intel,
  94                                intelObj->mt,
  95                                intelImage->face,
  96                                intelImage->level, intelImage->mt);
  97
  98       intel_miptree_release(intel, &intelImage->mt);
  99    }
 100    else {
 101       assert(intelImage->base.Data != NULL);
 102
 103       /* More straightforward upload.
 104        */
 105       intel_miptree_image_data(intel,
 106                                intelObj->mt,
 107                                intelImage->face,
 108                                intelImage->level,
 109                                intelImage->base.Data,
 110                                intelImage->base.RowStride,
 111                                intelImage->base.RowStride *
 112                                intelImage->base.Height);
 113       _mesa_align_free(intelImage->base.Data);
 114       intelImage->base.Data = NULL;
 115    }
 116
 117    intel_miptree_reference(&intelImage->mt, intelObj->mt);
 118 }
 119
 120
 121 /*
 122  */
 123 GLuint
 124 intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
 125 {
 126    struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
 127    struct intel_texture_object *intelObj = intel_texture_object(tObj);
 128    int comp_byte = 0;
 129    int cpp;
 130    GLuint face, i;
 131    GLuint nr_faces = 0;
 132    struct intel_texture_image *firstImage;
 133
 134    /* We know/require this is true by now:
 135     */
 136    assert(intelObj->base._Complete);
 137
 138    /* What levels must the tree include at a minimum?
 139     */
 140    intel_calculate_first_last_level(intel, intelObj);
 141    firstImage =
 142       intel_texture_image(intelObj->base.Image[0][intelObj->firstLevel]);
 143
 144    /* Fallback case:
 145     */
 146    if (firstImage->base.Border) {
 147       if (intelObj->mt) {
 148          intel_miptree_release(intel, &intelObj->mt);
 149       }
 150       return GL_FALSE;
 151    }
 152
 153
 154    /* If both firstImage and intelObj have a tree which can contain
 155     * all active images, favour firstImage.  Note that because of the
 156     * completeness requirement, we know that the image dimensions
 157     * will match.
 158     */
 159    if (firstImage->mt &&
 160        firstImage->mt != intelObj->mt &&
 161        firstImage->mt->first_level <= intelObj->firstLevel &&
 162        firstImage->mt->last_level >= intelObj->lastLevel) {
 163
 164       if (intelObj->mt)
 165          intel_miptree_release(intel, &intelObj->mt);
 166
 167       intel_miptree_reference(&intelObj->mt, firstImage->mt);
 168    }
 169
 170    if (_mesa_is_format_compressed(firstImage->base.TexFormat)) {
 171       comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat);
 172       cpp = comp_byte;
 173    }
 174    else
 175       cpp = _mesa_get_format_bytes(firstImage->base.TexFormat);
 176
 177    /* Check tree can hold all active levels.  Check tree matches
 178     * target, imageFormat, etc.
 179     *
 180     * XXX: For some layouts (eg i945?), the test might have to be
 181     * first_level == firstLevel, as the tree isn't valid except at the
 182     * original start level.  Hope to get around this by
 183     * programming minLod, maxLod, baseLevel into the hardware and
 184     * leaving the tree alone.
 185     */
 186    if (intelObj->mt &&
 187        (intelObj->mt->target != intelObj->base.Target ||
 188         intelObj->mt->internal_format != firstImage->base.InternalFormat ||
 189         intelObj->mt->first_level != intelObj->firstLevel ||
 190         intelObj->mt->last_level != intelObj->lastLevel ||
 191         intelObj->mt->width0 != firstImage->base.Width ||
 192         intelObj->mt->height0 != firstImage->base.Height ||
 193         intelObj->mt->depth0 != firstImage->base.Depth ||
 194         intelObj->mt->cpp != cpp ||
 195         intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
 196       intel_miptree_release(intel, &intelObj->mt);
 197    }
 198
 199
 200    /* May need to create a new tree:
 201     */
 202    if (!intelObj->mt) {
 203       intelObj->mt = intel_miptree_create(intel,
 204                                           intelObj->base.Target,
 205                                           firstImage->base._BaseFormat,
 206                                           firstImage->base.InternalFormat,
 207                                           intelObj->firstLevel,
 208                                           intelObj->lastLevel,
 209                                           firstImage->base.Width,
 210                                           firstImage->base.Height,
 211                                           firstImage->base.Depth,
 212                                           cpp,
 213                                           comp_byte,
 214                                           GL_TRUE);
 215    }
 216
 217    /* Pull in any images not in the object's tree:
 218     */
 219    nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 220    for (face = 0; face < nr_faces; face++) {
 221       for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
 222          struct intel_texture_image *intelImage =
 223             intel_texture_image(intelObj->base.Image[face][i]);
 224
 225          /* Need to import images in main memory or held in other trees.
 226           */
 227          if (intelObj->mt != intelImage->mt) {
 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 }