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Code Issues Releases Wiki Activity

In Pl_TIFFPredictor::processRow remove special case for first column

This commit is contained in:
m-holger 2024-01-26 20:56:21 +00:00
parent c01fc3c2ae
commit b7abb12f55
1 changed files with 3 additions and 10 deletions
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13
libqpdf/Pl_TIFFPredictor.cc
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@ -6,8 +6,6 @@
#include <climits>
#include <stdexcept>
#include <vector>
#include <iostream>
Pl_TIFFPredictor::Pl_TIFFPredictor(
char const* identifier,
@ -62,14 +60,9 @@ Pl_TIFFPredictor::processRow()
QTC::TC("libtests", "Pl_TIFFPredictor processRow", (action == a_decode ? 0 : 1));
BitWriter bw(p_next);
BitStream in(cur_row.data(), cur_row.size());
previous.clear();
for (unsigned int i = 0; i < this->samples_per_pixel; ++i) {
long long sample = in.getBitsSigned(this->bits_per_sample);
bw.writeBitsSigned(sample, this->bits_per_sample);
previous.push_back(sample);
}
for (unsigned int col = 1; col < this->columns; ++col) {
for (auto& prev : previous) {
previous.assign(samples_per_pixel, 0);
for (unsigned int col = 0; col < this->columns; ++col) {
for (auto& prev: previous) {
long long sample = in.getBitsSigned(this->bits_per_sample);
long long new_sample = sample;
if (action == a_encode) {