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In Pl_TIFFPredictor remove calls to memcpy
Instead of overwriting cur_row.data() use clear and insert.
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parent
902fd6df71
commit
5b7a44e1cc
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@ -3,10 +3,8 @@
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#include <qpdf/BitStream.hh>
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#include <qpdf/BitStream.hh>
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#include <qpdf/BitWriter.hh>
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#include <qpdf/BitWriter.hh>
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#include <qpdf/QTC.hh>
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#include <qpdf/QTC.hh>
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#include <qpdf/QUtil.hh>
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#include <climits>
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#include <climits>
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#include <cstring>
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#include <stdexcept>
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#include <stdexcept>
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#include <vector>
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#include <vector>
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@ -21,8 +19,7 @@ Pl_TIFFPredictor::Pl_TIFFPredictor(
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action(action),
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action(action),
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columns(columns),
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columns(columns),
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samples_per_pixel(samples_per_pixel),
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samples_per_pixel(samples_per_pixel),
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bits_per_sample(bits_per_sample),
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bits_per_sample(bits_per_sample)
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pos(0)
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{
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{
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if (samples_per_pixel < 1) {
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if (samples_per_pixel < 1) {
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throw std::runtime_error("TIFFPredictor created with invalid samples_per_pixel");
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throw std::runtime_error("TIFFPredictor created with invalid samples_per_pixel");
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@ -35,31 +32,28 @@ Pl_TIFFPredictor::Pl_TIFFPredictor(
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throw std::runtime_error("TIFFPredictor created with invalid columns value");
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throw std::runtime_error("TIFFPredictor created with invalid columns value");
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}
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}
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this->bytes_per_row = bpr & UINT_MAX;
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this->bytes_per_row = bpr & UINT_MAX;
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this->cur_row.assign(this->bytes_per_row, 0);
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}
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}
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void
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void
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Pl_TIFFPredictor::write(unsigned char const* data, size_t len)
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Pl_TIFFPredictor::write(unsigned char const* data, size_t len)
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{
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{
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size_t left = this->bytes_per_row - this->pos;
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size_t left = this->bytes_per_row - cur_row.size();
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size_t offset = 0;
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size_t offset = 0;
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while (len >= left) {
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while (len >= left) {
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// finish off current row
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// finish off current row
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memcpy(this->cur_row.data() + this->pos, data + offset, left);
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cur_row.insert(cur_row.end(), data + offset, data + offset + left);
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offset += left;
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offset += left;
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len -= left;
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len -= left;
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processRow();
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processRow();
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// Prepare for next row
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// Prepare for next row
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this->cur_row.assign(this->bytes_per_row, 0);
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this->cur_row.clear();
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left = this->bytes_per_row;
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left = this->bytes_per_row;
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this->pos = 0;
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}
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}
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if (len) {
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if (len) {
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memcpy(this->cur_row.data() + this->pos, data + offset, len);
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cur_row.insert(cur_row.end(), data + offset, data + offset + len);
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}
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}
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this->pos += len;
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}
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}
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void
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void
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@ -94,11 +88,11 @@ Pl_TIFFPredictor::processRow()
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void
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void
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Pl_TIFFPredictor::finish()
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Pl_TIFFPredictor::finish()
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{
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{
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if (this->pos) {
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if (!cur_row.empty()) {
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// write partial row
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// write partial row
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cur_row.insert(cur_row.end(), bytes_per_row - cur_row.size(), 0);
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processRow();
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processRow();
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}
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}
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this->pos = 0;
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cur_row.clear();
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this->cur_row.assign(this->bytes_per_row, 0);
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getNext()->finish();
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getNext()->finish();
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}
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}
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@ -34,7 +34,6 @@ class Pl_TIFFPredictor: public Pipeline
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unsigned int samples_per_pixel;
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unsigned int samples_per_pixel;
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unsigned int bits_per_sample;
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unsigned int bits_per_sample;
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std::vector<unsigned char> cur_row;
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std::vector<unsigned char> cur_row;
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size_t pos;
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};
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};
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#endif // PL_TIFFPREDICTOR_HH
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#endif // PL_TIFFPREDICTOR_HH
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