diff options
author | Christian Goetze <cg@lindenlab.com> | 2009-07-01 00:22:05 +0000 |
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committer | Christian Goetze <cg@lindenlab.com> | 2009-07-01 00:22:05 +0000 |
commit | e588d1f28419745ee1e1ee98dc1852e0364a4088 (patch) | |
tree | 8a3546576e0d5a8f0cf32cca68d0913f1061d523 /indra/llimage | |
parent | 5f4c09fa1f4b09126e1a16e78044c64e97828530 (diff) |
svn merge -r125825:125901 svn+ssh://svn.lindenlab.com/svn/user/cg/qar-1654
QAR-1654 merge completed.
Diffstat (limited to 'indra/llimage')
-rw-r--r-- | indra/llimage/llimagej2c.cpp | 48 | ||||
-rw-r--r-- | indra/llimage/llimagej2c.h | 4 |
2 files changed, 49 insertions, 3 deletions
diff --git a/indra/llimage/llimagej2c.cpp b/indra/llimage/llimagej2c.cpp index 1b93c21982..900652d06d 100644 --- a/indra/llimage/llimagej2c.cpp +++ b/indra/llimage/llimagej2c.cpp @@ -178,8 +178,8 @@ LLImageJ2C::LLImageJ2C() : LLImageFormatted(IMG_CODEC_J2C), mMaxBytes(0), mRawDiscardLevel(-1), mRate(0.0f), - mReversible(FALSE) - + mReversible(FALSE), + mAreaUsedForDataSizeCalcs(0) { //We assume here that if we wanted to create via //a dynamic library that the approriate open calls were made @@ -195,6 +195,12 @@ LLImageJ2C::LLImageJ2C() : LLImageFormatted(IMG_CODEC_J2C), } mImpl = j2cimpl_create_func(); + + // Clear data size table + for( S32 i = 0; i <= MAX_DISCARD_LEVEL; i++) + { // Array size is MAX_DISCARD_LEVEL+1 + mDataSizes[i] = 0; + } } // virtual @@ -367,9 +373,45 @@ S32 LLImageJ2C::calcHeaderSize() return calcHeaderSizeJ2C(); } + +// calcDataSize() returns how many bytes to read +// to load discard_level (including header and higher discard levels) S32 LLImageJ2C::calcDataSize(S32 discard_level) { - return calcDataSizeJ2C(getWidth(), getHeight(), getComponents(), discard_level, mRate); + discard_level = llclamp(discard_level, 0, MAX_DISCARD_LEVEL); + + if ( mAreaUsedForDataSizeCalcs != (getHeight() * getWidth()) + || mDataSizes[0] == 0) + { + mAreaUsedForDataSizeCalcs = getHeight() * getWidth(); + + S32 level = MAX_DISCARD_LEVEL; // Start at the highest discard + while ( level >= 0 ) + { + mDataSizes[level] = calcDataSizeJ2C(getWidth(), getHeight(), getComponents(), level, mRate); + level--; + } + + /* This is technically a more correct way to calculate the size required + for each discard level, since they should include the size needed for + lower levels. Unfortunately, this doesn't work well and will lead to + download stalls. The true correct way is to parse the header. This will + all go away with http textures at some point. + + // Calculate the size for each discard level. Lower levels (higher quality) + // contain the cumulative size of higher levels + S32 total_size = calcHeaderSizeJ2C(); + + S32 level = MAX_DISCARD_LEVEL; // Start at the highest discard + while ( level >= 0 ) + { // Add in this discard level and all before it + total_size += calcDataSizeJ2C(getWidth(), getHeight(), getComponents(), level, mRate); + mDataSizes[level] = total_size; + level--; + } + */ + } + return mDataSizes[discard_level]; } S32 LLImageJ2C::calcDiscardLevelBytes(S32 bytes) diff --git a/indra/llimage/llimagej2c.h b/indra/llimage/llimagej2c.h index 23f6ef5fd1..55df7f4429 100644 --- a/indra/llimage/llimagej2c.h +++ b/indra/llimage/llimagej2c.h @@ -87,6 +87,10 @@ protected: void updateRawDiscardLevel(); S32 mMaxBytes; // Maximum number of bytes of data to use... + + S32 mDataSizes[MAX_DISCARD_LEVEL+1]; // Size of data required to reach a given level + U32 mAreaUsedForDataSizeCalcs; // Height * width used to calculate mDataSizes + S8 mRawDiscardLevel; F32 mRate; BOOL mReversible; |