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DeltaBitmapRow: make members private

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This commit is contained in:
Miklos Vajna 2018-11-08 09:16:50 +01:00
parent a0f83bd9b9
commit df0b3835c5
1 changed files with 17 additions and 5 deletions
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22
kit/Delta.hpp
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@ -22,15 +22,27 @@
class DeltaGenerator {
struct DeltaBitmapRow {
private:
uint64_t _crc;
std::vector<uint32_t> _pixels;
public:
bool identical(const DeltaBitmapRow &other) const
{
if (_crc != other._crc)
return false;
return _pixels == other._pixels;
}
const std::vector<uint32_t>& getPixels() const
{
return _pixels;
}
std::vector<uint32_t>& getPixels()
{
return _pixels;
}
};
struct DeltaData {
@ -153,14 +165,14 @@ class DeltaGenerator {
{
int same;
for (same = 0; same + x < prev.getWidth() &&
prevRow._pixels[x+same] == curRow._pixels[x+same];)
prevRow.getPixels()[x+same] == curRow.getPixels()[x+same];)
++same;
x += same;
int diff;
for (diff = 0; diff + x < prev.getWidth() &&
(prevRow._pixels[x+diff] == curRow._pixels[x+diff] || diff < 2) &&
(prevRow.getPixels()[x+diff] == curRow.getPixels()[x+diff] || diff < 2) &&
diff < 254;)
++diff;
if (diff > 0)
@ -172,7 +184,7 @@ class DeltaGenerator {
size_t dest = output.size();
output.resize(dest + diff * 4);
memcpy(&output[dest], &curRow._pixels[x], diff * 4);
memcpy(&output[dest], &curRow.getPixels()[x], diff * 4);
LOG_TRC("different " << diff << "pixels");
x += diff;
@ -212,11 +224,11 @@ class DeltaGenerator {
// We get the hash ~for free as we copy - with a cheap hash.
uint64_t crc = 0x7fffffff - 1;
row._pixels.resize(width);
row.getPixels().resize(width);
for (int x = 0; x < width; ++x)
{
crc = (crc << 7) + crc + src[x];
row._pixels[x] = src[x];
row.getPixels()[x] = src[x];
}
}