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authorChristian Goetze <cg@lindenlab.com>2009-07-01 00:22:05 +0000
committerChristian Goetze <cg@lindenlab.com>2009-07-01 00:22:05 +0000
commite588d1f28419745ee1e1ee98dc1852e0364a4088 (patch)
tree8a3546576e0d5a8f0cf32cca68d0913f1061d523 /indra/llimage
parent5f4c09fa1f4b09126e1a16e78044c64e97828530 (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.cpp48
-rw-r--r--indra/llimage/llimagej2c.h4
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;