Able to be embedded in a single executable? about bc7e HOT 8 CLOSED

Saw ISPC can emit c++.

mkdir build
cd build
..\ispc -g -O2 "../bc7e.ispc" -h "bc7e_ispc.h" --target=generic-x64 --opt=disable-assertions --emit-c++ -o "bc7e_ispc.cpp"

from bc7e.

1. emit-c++ has been removed from the latest version of ispc
2. emit-llvm requires llc to compile the bitcode
3. emit-asm I couldn't get to work
4. shipping ispc is not a good option
5. requiring developers to use ispc is hard

from bc7e.

Your findings are very interesting. I was under the impression that ispc usage is pretty common, even on consoles (surprisingly). (FWIW, we've made license deals off our ispc code.) I have an pure C++ alternative which I could port the ispc code to (cppspmd_fast), which would eliminate ispc completely.

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from bc7e.

@richgel999 Keep me posted about any releases of a SIMD C++ bc7 compressor.

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Thanks I was able to embed this into Godot.

Having trouble investigating why the default is degraded though.

Degraded. Flag 3, perceptual on. INTERPOLATE_LANCZOS (on) is 1.5s, billinear is 0.8s. Trying lod texure bias -2.

Loss-less

from bc7e.

Something went horribly wrong.

Luma  Max error: 186.000000 RMSE: 11.887165 PSNR 26.629238 dB

RGB   Max error: 190.000000 RMSE: 12.718388 PSNR 26.042162 dB

RGBA  Max error: 190.000000 RMSE: 11.014447 PSNR 27.291550 dB

Alpha Max error: 0.000000 RMSE: 0.000000 PSNR 10000000000.000000 dB

# official encoder
Total time: 0.252000 secs
Total time: 0.090000 secs
Wrote DDS file unpacked_output.png
Luma  Max error:   9 RMSE: 0.485853 PSNR 54.40 dB
RGB   Max error:  24 RMSE: 0.806147 PSNR 50.00 dB
RGBA  Max error:  24 RMSE: 0.765902 PSNR 50.45 dB
Alpha Max error:   1 RMSE: 0.629923 PSNR 52.15 dB
Wrote PNG file clay-banks-ZNUh3gpkt1s-unsplash-crop_unpacked.png
Wrote PNG file clay-banks-ZNUh3gpkt1s-unsplash-crop_unpacked_alpha.png

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Resolved https://github.com/fire/godot/tree/bc7e.

64 bit address is not compatible from ispc.

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