read fragment shader from file at argument path

README.md

@@ -56,6 +56,7 @@ options:
   --help             show this help message and exit
   -v, --version      print version
   -s, --screen       output screen number (default: primary)
+  -f, --frag         fragment shader path (default: TODO)
 ```
 
 ## Release guide
@@ -90,20 +91,31 @@ make -f Makefile.dev release-arch
   - [ ] Handle compilation errors
   - [x] Minimal working fragment sample
   - [x] Hot-reload fragment shader
-  - [ ] Specify fragment shader path
+  - [x] Specify fragment shader path
   - [x] Force fullscreen
   - [x] Select screen as argument / config
+  - [ ] Clean code
+- [ ] Multi-stage shaders
+  - [ ] Test 2 stages with render to texture
+  - [ ] 2 in 2 fx 1 mix 1 fx layout
+  - [ ] Include fragments with special directive
+  - [ ] 16 input + 16 fx definition and selection (with param)
+  - [ ] Feedback texture
+  - [ ] Clean code
 - [ ] Midi
   - [ ] Read Midi events
   - [ ] Read midi mapping config file
   - [ ] Write Midi events
-- [ ] MVP
-  - [ ] Add required libraries in target build
-  - [ ] Include fragments with special directive
-  - [ ] Source mixing
   - [ ] Save midi state
-- [ ] Advanced
-  - [ ] Video input
-  - [ ] Feedback input
   - [ ] Tap-tempo feature
-  - [ ] Monitor screen feature (other window)
+  - [ ] Clean code
+- [ ] Video input
+  - [ ] Fixed camera video
+  - [ ] Video mapping config file
+  - [ ] Clean code
+- [ ] Monitor screen
+  - [ ] 2nd window
+  - [ ] Use buffers as panels (INA A FXA / DEBUG A+B FXA+B / INB B FXB)
+  - [ ] Clean code
+- [ ] Packaging & install
+  - [ ] Clone "shaders" and config in system path at setup