14.04.2011 16:43, Mikhail I. Izmestev пишет:
14.04.2011 16:34, Mikhail I. Izmestev wrote:14.04.2011 16:16, Robert Osfield wrote:The heart of the problem is that the DDS file format doesn't distiguish between the two varients of DXT1, there is an alpha bit in the DDS header that could be used, but 3rd party tools like nvdxt and nvcompress that write DDS files don't set this bit so both DTX1c with black encoded pixels and DTX1a are essentially identical in terms of header and content.Where from this information? $ nvdxt.exe -nomipmap -dxt1a -file test_dxt1.png -output test_dxt1a.dds Version 8.30 Reading test_dxt1.png [Processing] Writing .\test_dxt1a.dds $ nvdxt.exe -nomipmap -dxt1c -file test_dxt1.png -output test_dxt1c.dds Version 8.30 Reading test_dxt1.png [Processing] Writing .\test_dxt1c.dds $ md5sum.exe test_dxt1*.dds ac1473f8822abbb2d6006de0021c6bc0 *test_dxt1a.dds 249071d0b0974593b310656acea73e1d *test_dxt1c.dds MikhailAttach files to previous message. Mikhail
I'm sorry, In DDS header really no alpha flag, my mistake :)$ nvdxt.exe -nomipmap -alpha -dxt1a -file test_dxt1_a.png -output test_dxt1a_a.dds
Version 8.30
Reading test_dxt1_a.png [Processing] Writing .\test_dxt1a_a.dds
$ nvdxt.exe -nomipmap -dxt1c -alpha -file test_dxt1_a.png -output
test_dxt1c_a.dds
Version 8.30
Reading test_dxt1_a.png [Processing] Writing .\test_dxt1c_a.dds
Mikhail.
test_dxt1c_a.dds
Description: Binary data
<<attachment: test_dxt1_a.png>>
test_dxt1a_a.dds
Description: Binary data
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