diff options
| -rw-r--r-- | indra/llimage/llimagej2c.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/indra/llimage/llimagej2c.cpp b/indra/llimage/llimagej2c.cpp index 0058b91b0f..5dfd8cd947 100644 --- a/indra/llimage/llimagej2c.cpp +++ b/indra/llimage/llimagej2c.cpp @@ -278,13 +278,20 @@ S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 r S32 nb_layers = 1; S32 surface = w*h; S32 s = 64*64; + S32 precision = 8; // assumed bitrate per component channel, might change in future for HDR support + S32 totalbytes = (S32)(s * comp * precision * rate); // first level computed before loop while (surface > s) { + if (nb_layers <= (5 - discard_level)) + totalbytes += (S32)(s * comp * precision * rate); nb_layers++; s *= 4; } F32 layer_factor = 3.0f * (7 - llclamp(nb_layers,1,6)); + totalbytes /= 8; // to bytes + totalbytes += calcHeaderSizeJ2C(); // header + // Compute w/pow(2,discard_level) and h/pow(2,discard_level) w >>= discard_level; h >>= discard_level; @@ -297,7 +304,9 @@ S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 r S32 new_bytes = (S32) (sqrt((F32)(w*h))*(F32)(comp)*rate*1000.f/layer_factor); S32 old_bytes = (S32)((F32)(w*h*comp)*rate); bytes = (LLImage::useNewByteRange() && (new_bytes < old_bytes) ? new_bytes : old_bytes); - bytes = llmax(bytes, calcHeaderSizeJ2C()); + bytes = llmax(totalbytes, calcHeaderSizeJ2C()); + //LL_WARNS() << "calcDataSizeJ2C w-h-c-d-p " << w << "-" << h << "-" << comp << "-" << discard_level << "-" << precision + // << " Pyramid: " << (S32)totalbytes << " LayerFactored: " << new_bytes << " WJCR: " << old_bytes << LL_ENDL; return bytes; } |