diff options
Diffstat (limited to 'indra/llkdu')
| -rw-r--r-- | indra/llkdu/llimagej2ckdu.cpp | 57 |
1 files changed, 50 insertions, 7 deletions
diff --git a/indra/llkdu/llimagej2ckdu.cpp b/indra/llkdu/llimagej2ckdu.cpp index 2847f347c2..d9f0935712 100644 --- a/indra/llkdu/llimagej2ckdu.cpp +++ b/indra/llkdu/llimagej2ckdu.cpp @@ -31,19 +31,34 @@ #include "llpointer.h" #include "llmath.h" #include "llkdumem.h" +#include "stringize.h" #include "kdu_block_coding.h" +#include <stdexcept> +#include <iostream> #include "llexception.h" #include <boost/throw_exception.hpp> namespace { +// exception used to keep KDU from terminating entire program -- see comments +// in LLKDUMessageError::flush() struct KDUError: public LLException { KDUError(const std::string& msg): LLException(msg) {} }; } // anonymous namespace +// stream kdu_dims to std::ostream +// Turns out this must NOT be in the anonymous namespace! +inline +std::ostream& operator<<(std::ostream& out, const kdu_dims& dims) +{ + return out << "(" << dims.pos.x << "," << dims.pos.y << ")," + "[" << dims.size.x << "x" << dims.size.y << "]"; +} + + class kdc_flow_control { public: @@ -175,9 +190,15 @@ struct LLKDUMessageError : public LLKDUMessage // terminating handler→flush call." // So throwing an exception here isn't arbitrary: we MUST throw an // exception if we want to recover from a KDU error. + // Because this confused me: the above quote specifically refers to + // the kdu_error class, which is constructed internally within KDU at + // the point where a fatal error is discovered and reported. It is NOT + // talking about the kdu_message subclass passed to + // kdu_customize_errors(). Destroying this static object at program + // shutdown will NOT engage the behavior described above. if (end_of_message) { - BOOST_THROW_EXCEPTION(KDUError("LLKDUMessageError::flush()")); + throw "KDU throwing an exception"; } } }; @@ -206,6 +227,10 @@ LLImageJ2CKDU::~LLImageJ2CKDU() // Stuff for new simple decode void transfer_bytes(kdu_byte *dest, kdu_line_buf &src, int gap, int precision); +// This is called by the real (private) initDecode() (keep_codestream true) +// and getMetadata() methods (keep_codestream false). As far as nat can tell, +// mode is always MODE_FAST. It was called by findDiscardLevelsBoundaries() +// as well, when that still existed, with keep_codestream true and MODE_FAST. void LLImageJ2CKDU::setupCodeStream(LLImageJ2C &base, bool keep_codestream, ECodeStreamMode mode) { S32 data_size = base.getDataSize(); @@ -216,6 +241,12 @@ void LLImageJ2CKDU::setupCodeStream(LLImageJ2C &base, bool keep_codestream, ECod // mCodeStreamp.reset(); + // It's not clear to nat under what circumstances we would reuse a + // pre-existing LLKDUMemSource instance. As of 2016-08-05, it consists of + // two U32s and a pointer, so it's not as if it would be a huge overhead + // to allocate a new one every time. + // Also -- why is base.getData() tested specifically here? If that returns + // NULL, shouldn't we bail out of the whole method? if (!mInputp && base.getData()) { // The compressed data has been loaded @@ -272,13 +303,19 @@ void LLImageJ2CKDU::setupCodeStream(LLImageJ2C &base, bool keep_codestream, ECod S32 components = mCodeStreamp->get_num_components(); - if (components >= 3) - { // Check that components have consistent dimensions (for PPM file) - kdu_dims dims1; mCodeStreamp->get_dims(1,dims1); - kdu_dims dims2; mCodeStreamp->get_dims(2,dims2); - if ((dims1 != dims) || (dims2 != dims)) + // Check that components have consistent dimensions (for PPM file) + for (int idx = 1; idx < components; ++idx) + { + kdu_dims other_dims; + mCodeStreamp->get_dims(idx, other_dims); + if (other_dims != dims) { - LL_ERRS() << "Components don't have matching dimensions!" << LL_ENDL; + // This method is only called from methods that catch KDUError. + // We want to fail the image load, not crash the viewer. + throw KDUError(STRINGIZE("Component " << idx << " dimensions " + << other_dims + << " do not match component 0 dimensions " + << dims << "!")); } } @@ -305,6 +342,9 @@ void LLImageJ2CKDU::cleanupCodeStream() mTileIndicesp.reset(); } +// This is the protected virtual method called by LLImageJ2C::initDecode(). +// However, as far as nat can tell, LLImageJ2C::initDecode() is called only by +// llimage_libtest.cpp's load_image() function. No detectable production use. bool LLImageJ2CKDU::initDecode(LLImageJ2C &base, LLImageRaw &raw_image, int discard_level, int* region) { return initDecode(base,raw_image,0.0f,MODE_FAST,0,4,discard_level,region); @@ -337,6 +377,9 @@ bool LLImageJ2CKDU::initEncode(LLImageJ2C &base, LLImageRaw &raw_image, int bloc return true; } +// This is the real (private) initDecode() called both by the protected +// initDecode() method and by decodeImpl(). As far as nat can tell, only the +// decodeImpl() usage matters for production. bool LLImageJ2CKDU::initDecode(LLImageJ2C &base, LLImageRaw &raw_image, F32 decode_time, ECodeStreamMode mode, S32 first_channel, S32 max_channel_count, int discard_level, int* region) { base.resetLastError(); |