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 (intel->gen == 2) {
  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 = intel_texture_image(tObj->Image[0][intelObj->firstLevel]);
 142
 143    /* Fallback case:
 144     */
 145    if (firstImage->base.Border) {
 146       if (intelObj->mt) {
 147          intel_miptree_release(intel, &intelObj->mt);
 148       }
 149       return GL_FALSE;
 150    }
 151
 152
 153    /* If both firstImage and intelObj have a tree which can contain
 154     * all active images, favour firstImage.  Note that because of the
 155     * completeness requirement, we know that the image dimensions
 156     * will match.
 157     */
 158    if (firstImage->mt &&
 159        firstImage->mt != intelObj->mt &&
 160        firstImage->mt->first_level <= intelObj->firstLevel &&
 161        firstImage->mt->last_level >= intelObj->lastLevel) {
 162
 163       if (intelObj->mt)
 164          intel_miptree_release(intel, &intelObj->mt);
 165
 166       intel_miptree_reference(&intelObj->mt, firstImage->mt);
 167    }
 168
 169    if (_mesa_is_format_compressed(firstImage->base.TexFormat)) {
 170       comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat);
 171       cpp = comp_byte;
 172    }
 173    else
 174       cpp = _mesa_get_format_bytes(firstImage->base.TexFormat);
 175
 176    /* Check tree can hold all active levels.  Check tree matches
 177     * target, imageFormat, etc.
 178     *
 179     * XXX: For some layouts (eg i945?), the test might have to be
 180     * first_level == firstLevel, as the tree isn't valid except at the
 181     * original start level.  Hope to get around this by
 182     * programming minLod, maxLod, baseLevel into the hardware and
 183     * leaving the tree alone.
 184     */
 185    if (intelObj->mt &&
 186        (intelObj->mt->target != intelObj->base.Target ||
 187         intelObj->mt->internal_format != firstImage->base.InternalFormat ||
 188         intelObj->mt->first_level != intelObj->firstLevel ||
 189         intelObj->mt->last_level != intelObj->lastLevel ||
 190         intelObj->mt->width0 != firstImage->base.Width ||
 191         intelObj->mt->height0 != firstImage->base.Height ||
 192         intelObj->mt->depth0 != firstImage->base.Depth ||
 193         intelObj->mt->cpp != cpp ||
 194         intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
 195       intel_miptree_release(intel, &intelObj->mt);
 196    }
 197
 198
 199    /* May need to create a new tree:
 200     */
 201    if (!intelObj->mt) {
 202       intelObj->mt = intel_miptree_create(intel,
 203                                           intelObj->base.Target,
 204                                           firstImage->base._BaseFormat,
 205                                           firstImage->base.InternalFormat,
 206                                           intelObj->firstLevel,
 207                                           intelObj->lastLevel,
 208                                           firstImage->base.Width,
 209                                           firstImage->base.Height,
 210                                           firstImage->base.Depth,
 211                                           cpp,
 212                                           comp_byte,
 213                                           GL_TRUE);
 214    }
 215
 216    /* Pull in any images not in the object's tree:
 217     */
 218    nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 219    for (face = 0; face < nr_faces; face++) {
 220       for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
 221          struct intel_texture_image *intelImage =
 222             intel_texture_image(intelObj->base.Image[face][i]);
 223
 224          /* Need to import images in main memory or held in other trees.
 225           * If it's a render target, then its data isn't needed to be in
 226           * the object tree (otherwise we'd be FBO incomplete), and we need
 227           * to keep track of the image's MT as needing to be pulled in still,
 228           * or we'll lose the rendering that's done to it.
 229           */
 230          if (intelObj->mt != intelImage->mt &&
 231              !intelImage->used_as_render_target) {
 232             copy_image_data_to_tree(intel, intelObj, intelImage);
 233          }
 234       }
 235    }
 236
 237    return GL_TRUE;
 238 }
 239
 240 void
 241 intel_tex_map_level_images(struct intel_context *intel,
 242                            struct intel_texture_object *intelObj,
 243                            int level)
 244 {
 245    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 246    GLuint face;
 247
 248    for (face = 0; face < nr_faces; face++) {
 249       struct intel_texture_image *intelImage =
 250          intel_texture_image(intelObj->base.Image[face][level]);
 251
 252       if (intelImage && intelImage->mt) {
 253          intelImage->base.Data =
 254             intel_miptree_image_map(intel,
 255                                     intelImage->mt,
 256                                     intelImage->face,
 257                                     intelImage->level,
 258                                     &intelImage->base.RowStride,
 259                                     intelImage->base.ImageOffsets);
 260          /* convert stride to texels, not bytes */
 261          intelImage->base.RowStride /= intelImage->mt->cpp;
 262          /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
 263       }
 264    }
 265 }
 266
 267 void
 268 intel_tex_unmap_level_images(struct intel_context *intel,
 269                              struct intel_texture_object *intelObj,
 270                              int level)
 271 {
 272    GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 273    GLuint face;
 274
 275    for (face = 0; face < nr_faces; face++) {
 276       struct intel_texture_image *intelImage =
 277          intel_texture_image(intelObj->base.Image[face][level]);
 278
 279       if (intelImage && intelImage->mt) {
 280          intel_miptree_image_unmap(intel, intelImage->mt);
 281          intelImage->base.Data = NULL;
 282       }
 283    }
 284 }
 285
 286 void
 287 intel_tex_map_images(struct intel_context *intel,
 288                      struct intel_texture_object *intelObj)
 289 {
 290    int i;
 291
 292    DBG("%s\n", __FUNCTION__);
 293
 294    for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
 295       intel_tex_map_level_images(intel, intelObj, i);
 296 }
 297
 298 void
 299 intel_tex_unmap_images(struct intel_context *intel,
 300                        struct intel_texture_object *intelObj)
 301 {
 302    int i;
 303
 304    for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
 305       intel_tex_unmap_level_images(intel, intelObj, i);
 306 }