static radeon_mipmap_tree *radeon_miptree_create_for_teximage(radeonContextPtr rmesa,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage)
{
radeonTexObj *t = radeon_tex_obj(texObj);
GLuint firstLevel;
GLuint lastLevel;
int width, height, depth;
int i;
width = texImage->Width;
height = texImage->Height;
depth = texImage->Depth;
if (texImage->Level > texObj->BaseLevel &&
(width == 1 ||
(texObj->Target != GL_TEXTURE_1D && height == 1) ||
(texObj->Target == GL_TEXTURE_3D && depth == 1))) {
/* For this combination, we're at some lower mipmap level and
* some important dimension is 1. We can't extrapolate up to a
* likely base level width/height/depth for a full mipmap stack
* from this info, so just allocate this one level.
*/
firstLevel = texImage->Level;
lastLevel = texImage->Level;
} else {
if (texImage->Level < texObj->BaseLevel)
firstLevel = 0;
else
firstLevel = texObj->BaseLevel;
for (i = texImage->Level; i > firstLevel; i--) {
width <<= 1;
if (height != 1)
height <<= 1;
if (depth != 1)
depth <<= 1;
}
if ((texObj->Sampler.MinFilter == GL_NEAREST ||
texObj->Sampler.MinFilter == GL_LINEAR) &&
texImage->Level == firstLevel) {
lastLevel = firstLevel;
} else {
lastLevel = firstLevel + _mesa_logbase2(MAX2(MAX2(width, height), depth));
}
}
return radeon_miptree_create(rmesa, texObj->Target,
texImage->TexFormat, firstLevel, lastLevel - firstLevel + 1,
width, height, depth,
t->tile_bits);
}
/**
* Try to allocate a mipmap tree for the given texture object.
* @param[in] rmesa radeon context
* @param[in] t radeon texture object
*/
void radeon_try_alloc_miptree(radeonContextPtr rmesa, radeonTexObj *t)
{
struct gl_texture_object *texObj = &t->base;
struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel];
GLuint numLevels;
assert(!t->mt);
if (!texImg) {
radeon_warning("%s(%p) No image in given texture object(%p).\n",
__func__, rmesa, t);
return;
}
numLevels = MIN2(texObj->MaxLevel - texObj->BaseLevel + 1, texImg->MaxNumLevels);
t->mt = radeon_miptree_create(rmesa, t->base.Target,
texImg->TexFormat, texObj->BaseLevel,
numLevels, texImg->Width, texImg->Height,
texImg->Depth, t->tile_bits);
}
