Add GLSL shader node using PyOpenGL (#12148)

* adds support for executing simple glsl shaders using moderngl package * tidy * Support multiple outputs * Try fix build * fix casing * fix line endings * convert to using PyOpenGL and glfw * remove cpu support * tidy * add additional support for egl & osmesa backends * fix ci perf: only read required outputs * add diagnostics, update mac initialization * GLSL glueprints + node fixes (#12492) * Add image operation blueprints * Add channels * Add glow * brightness/contrast * hsb * add glsl shader update system * shader nit iteration * add multipass for faster blur * more fixes * rebuild blueprints * print -> logger * Add edge preserving blur * fix: move _initialized flag to end of GLContext.__init__ Prevents '_vao' attribute error when init fails partway through and subsequent calls skip initialization due to early _initialized flag. * update valid ranges - threshold 0-100 - step 0+ * fix value ranges * rebuild node to remove extra inputs * Fix gamma step * clamp saturation in colorize instead of wrapping * Fix crash on 1x1 px images * rework description * remove unnecessary f Co-authored-by: Jedrzej Kosinski <kosinkadink1@gmail.com> Co-authored-by: Hunter Senft-Grupp <hunter@comfy.org>
2026-02-20 04:22:13 +00:00
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+# GLSL Shader Sources
+
+This folder contains the GLSL fragment shaders extracted from blueprint JSON files for easier editing and version control.
+
+## File Naming Convention
+
+`{Blueprint_Name}_{node_id}.frag`
+
+- **Blueprint_Name**: The JSON filename with spaces/special chars replaced by underscores
+- **node_id**: The GLSLShader node ID within the subgraph
+
+## Usage
+
+```bash
+# Extract shaders from blueprint JSONs to this folder
+python update_blueprints.py extract
+
+# Patch edited shaders back into blueprint JSONs
+python update_blueprints.py patch
+```
+
+## Workflow
+
+1. Run `extract` to pull current shaders from JSONs
+2. Edit `.frag` files
+3. Run `patch` to update the blueprint JSONs
+4. Test
+5. Commit both `.frag` files and updated JSONs