no main()..

[robclark]

I think you need to append something along the lines of:

void main() { mainImage(gl_FragColor, gl_FragCoord.xy); }

to the end of the shader.. I guess that should probably be done in getshader.py

[simon-budig]

yeah, seems something has changed on shadertoy.com. Need to investigate this.

[robclark]

fwiw, this seems to do the trick:

---

diff --git a/getshader.py b/getshader.py
index 5123300..053bd91 100755
--- a/getshader.py
+++ b/getshader.py
@@ -38,6 +38,10 @@ uniform vec4 iDate; // (year, month, day, time in secs)
uniform float iSampleRate; // sound sample rate (i.e., 44100)
\n"""

+shaderfooter = """
+void main() { mainImage(gl_FragColor, gl_FragCoord.xy); }
+\n"""
+
def get_shader (id):
url = 'https://www.shadertoy.com/shadertoy'
headers = { 'Referer' : 'https://www.shadertoy.com/' }
@@ -93,6 +97,7 @@ if name == 'main':
f.write (shaderinfo % info)
f.write (shaderdecls)
f.write (code)

•  f.write (shaderfooter)
  

  f.close ()
  print ("wrote shader to "%s"" % fname, file=sys.stderr)

---

not sure if there is a better way to pick the sampler types.. but anyways, this is pretty cool since I'd been wanting to test freedreno against some of the shadertoy shaders, but with firefox I just get crashes in some unrelated cairo code ;-)

[simon-budig]

I have tracked down main() used on shadertoy.com. It additionally ensures that the alpha channel is opaque.

fixed in commit 90f7bd6

[robclark]

cool, thx