[Mesa-dev] [PATCH shader-db] Add support for shadertoy tests

[Rob Clark]

Attached script grabs shaders from shadertoy, and dumps them out as
.shader_test files which can be run through shader-db for compiler
testing.

shadertoy only gives you a fragment shader (which works based on
gl_FragCoord), so a generic vertex shader is used.  And a blurb is
inserted for the pre-defined uniforms and main() function (which just
calls shadertoy mainImage() fxn).

v2: updated w/ python suggestions from Dylan

---
Note: we probably want to pick a couple shadertoy shaders and commit
them (rather than pulling down *all* shadertoy shaders, which may
change over time, etc).  I can just pick a couple randomly unless
anyone has some requests.  Either way, seems useful to have the script
in git in case anyone else wants to grab new/more shaders.

 grab-shadertoy.py | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100755 grab-shadertoy.py

diff --git a/grab-shadertoy.py b/grab-shadertoy.py
new file mode 100755
index 0000000..04db411
--- /dev/null
+++ b/grab-shadertoy.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+
+
+import os, requests, textwrap
+
+url = 'https://www.shadertoy.com/api/v1/shaders'
+key = '?key=NdnKw7'
+
+header = textwrap.dedent("""\
+    [require]
+    GLSL >= 1.30
+
+    [fragment shader]
+    #version 130
+    uniform vec3      iResolution;
+    uniform float     iGlobalTime;
+    uniform float     iChannelTime[4];
+    uniform vec4      iMouse;
+    uniform vec4      iDate;
+    uniform float     iSampleRate;
+    uniform vec3      iChannelResolution[4];
+    uniform sampler2D iChannel0;
+    uniform sampler2D iChannel1;
+    uniform sampler2D iChannel2;
+    uniform sampler2D iChannel3;
+
+""")
+
+footer = textwrap.dedent("""\
+
+    void main() { mainImage(gl_FragColor, gl_FragCoord.xy); }
+
+    [vertex shader]
+    #version 130
+    in vec2 position;
+
+    void main()
+    {
+       gl_Position = vec4(position, 0.0, 1.0);
+    }
+""")
+
+# Get the list of shaders
+r = requests.get(url + key)
+j = r.json()
+print('Found {} shaders'.format(j['Shaders']))
+
+shader_ids = j['Results']
+for id in shader_ids:
+    print('Fetching shader: {}'.format(id))
+    print('url: {}/{}{}'.format(url, id, key))
+    r = requests.get(url + '/' + id + key)
+    j = r.json()
+    s = j['Shader']
+    info = s['info']
+    print('Name: ' + info['name'])
+    print('Description: ' + info['description'])
+    if not os.path.exists('shaders/shadertoy'):
+        os.makedirs('shaders/shadertoy')
+    for i, p in enumerate(s['renderpass']):
+        #print('Inputs: {}'.format(p['inputs']))
+        #print('Outputs: {}'.format(p['outputs']))
+        with open('shaders/shadertoy/{}_{}.shader_test'.format(id, i), 'w') as fobj:
+            fobj.write(header)
+            fobj.write(p['code'])
+            fobj.write(footer)
-- 
2.4.3