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Faster png save with still good compression, fixes #4045

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heckflosse
2017-11-18 12:56:37 +01:00
parent 4d81812d13
commit 5ddd42f721
15 changed files with 18 additions and 52 deletions
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6
rtengine/imageio.cc
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@@ -905,7 +905,7 @@ int ImageIO::loadPPMFromMemory(const char* buffer, int width, int height, bool s
return IMIO_SUCCESS;
}
int ImageIO::savePNG (Glib::ustring fname, int compression, volatile int bps)
int ImageIO::savePNG (Glib::ustring fname, volatile int bps)
{
if (getWidth() < 1 || getHeight() < 1) {
return IMIO_HEADERERROR;
@@ -945,7 +945,9 @@ int ImageIO::savePNG (Glib::ustring fname, int compression, volatile int bps)
png_set_write_fn (png, file, png_write_data, png_flush);
png_set_compression_level(png, compression);
png_set_filter(png, 0, PNG_FILTER_PAETH);
png_set_compression_level(png, 6);
png_set_compression_strategy(png, 3);
int width = getWidth ();
int height = getHeight ();