"Mateusz Loskot" <mateusz@loskot.net> wrote in message news:4D06B2C7.4030604@loskot.net...
On 13/12/10 17:53, Mateusz Loskot wrote:
I'm going to run your benchmark and submit my results here https://github.com/mloskot/workshop/tree/master/benchmarking/tiling/gil but I'm missing some details about how to configure and build it. Can I find it anywhere?
Domagoj,
As far as I can see, implementation of your extension is Windows/Visual C++-specific, so I'm not really able to do anything to run it on Linux at this moment.
Hi Mateusz, I've finally cleaned up io2 to compile on *NIXes (test with GCC 4.2.1, GCC 4.6, Apple Clang 1.6 and Clang 2.8) and I've added low level access routines (what Phil was asking for). All backends support scanline/row based access (even if emulated, as in the case of WIC and GDI+), and the LibTIFF backend additionally supports tile based access... These low level access routines expect the caller to know what he/she is doing and perform no checks or conversions...A supplementary set of member functions and metafunctions was added for this purpose (to query image information before you start low level access), such as can_do_tile_access(), format(), get_native_format<> ... I'll explain it in more detail in another post... Anyways the LibTIFF tile based access can now be used to rewrite my original benchmark code so that you can run it on a *NIX machine... Here's the code: http://codepad.org/bKHEWPKb On a weak Mac Mini with OS X 10.6.6 [a Core (1) Duo@1.8GHz, 1GB RAM (~640MB of which is eaten by the OS) and a slow, small and uber fragmented disk] this finishes in ~34 seconds... On a Windows 7 Core 2 Duo@3.2Ghz + 4GB RAM + el-cheapo RAID 5 setup it finishes in ~16 seconds (~33 seconds on the first run while nothing is in cache)... Configuration: OSX: - everything built with Clang 2.8 -m32 -O4 (-flto) -DNDEBUG -msse -ffast-math - static linking except with libstc++ - libs: LibTIFF 3.9.2, LibJPEG 8b, zlib 1.2.4 Win7 - everything built with MSVC++ 10 x86 /Ox /Ob2 /Oi /Ot /Oy /GL /GF /MT /GS- /Gy /arch:SSE /fp:fast /DNDEBUG - static linking - libs: LibTIFF 3.9.4, LibJPEG 8a, zlib 1.2.5 -- "What Huxley teaches is that in the age of advanced technology, spiritual devastation is more likely to come from an enemy with a smiling face than from one whose countenance exudes suspicion and hate." Neil Postman