[examples] `rlgl_compute_shader` not working

[Steelsmasher]

Issue description

The rlgl_compute_shader.c example doesn't work for me. The text, FPS and red rectangle are visible, but there's no white texture and clicking doesn't appear to do anything.

I've tried defining the OpenGL version in the rlgl file as per #2911 (comment) but it hasn't worked.

Environment

Windows 11, OpenGL 4.6, AMD Radeon 780M

[raysan5]

@Steelsmasher Just tested it and it works for me on Windows 10, please, could you post the output log? Also, are you using latest raylib from master branch?

[Steelsmasher]

This is a fresh install from raylib itch.io installer. Version 5.5

Output log:

> Setup required Environment
-------------------------------------
SET: RAYLIB_PATH=C:\raylib\raylib
$(RAYLIB_PATH) = C:\raylib\raylib
SET: COMPILER_PATH=C:\raylib\w64devkit\bin
$(COMPILER_PATH) = C:\raylib\w64devkit\bin
ENV_SET: PATH=C:\raylib\w64devkit\bin
$(SYS.PATH) = C:\raylib\w64devkit\bin
SET: CC=gcc
$(CC) = gcc
SET: CFLAGS=$(RAYLIB_PATH)\src\raylib.rc.data -s -static -O2 -std=c99 -Wall -I$(RAYLIB_PATH)\src -Iexternal -DPLATFORM_DESKTOP
$(CFLAGS) = C:\raylib\raylib\src\raylib.rc.data -s -static -O2 -std=c99 -Wall -IC:\raylib\raylib\src -Iexternal -DPLATFORM_DESKTOP
SET: LDFLAGS=-lraylib -lopengl32 -lgdi32 -lwinmm
$(LDFLAGS) = -lraylib -lopengl32 -lgdi32 -lwinmm
CD: C:\raylib\raylib\examples\others
Current directory: C:\raylib\raylib\examples\others

> Clean latest build
------------------------
cmd /c IF EXIST rlgl_compute_shader.exe del /F rlgl_compute_shader.exe
Process started (PID=13232) >>>
<<< Process finished (PID=13232). (Exit code 0)

> Saving Current File
-------------------------
NPP_SAVE: C:\raylib\raylib\examples\others\rlgl_compute_shader.c

> Compile program
-----------------------
gcc --version
Process started (PID=8256) >>>
gcc (GCC) 14.2.0
Copyright (C) 2024 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

<<< Process finished (PID=8256). (Exit code 0)
gcc -o rlgl_compute_shader.exe rlgl_compute_shader.c C:\raylib\raylib\src\raylib.rc.data -s -static -O2 -std=c99 -Wall -IC:\raylib\raylib\src -Iexternal -DPLATFORM_DESKTOP -lraylib -lopengl32 -lgdi32 -lwinmm
Process started (PID=13172) >>>
<<< Process finished (PID=13172). (Exit code 0)

> Reset Environment
--------------------------
ENV_UNSET: PATH
$(SYS.PATH) has been restored

> Execute program
-----------------------
cmd /c IF EXIST rlgl_compute_shader.exe rlgl_compute_shader.exe
Process started (PID=31452) >>>
INFO: Initializing raylib 5.5
INFO: Platform backend: DESKTOP (GLFW)
INFO: Supported raylib modules:
INFO:     > rcore:..... loaded (mandatory)
INFO:     > rlgl:...... loaded (mandatory)
INFO:     > rshapes:... loaded (optional)
INFO:     > rtextures:. loaded (optional)
INFO:     > rtext:..... loaded (optional)
INFO:     > rmodels:... loaded (optional)
INFO:     > raudio:.... loaded (optional)
INFO: DISPLAY: Device initialized successfully
INFO:     > Display size: 3840 x 2160
INFO:     > Screen size:  768 x 768
INFO:     > Render size:  768 x 768
INFO:     > Viewport offsets: 0, 0
INFO: GLAD: OpenGL extensions loaded successfully
INFO: GL: Supported extensions count: 296
INFO: GL: OpenGL device information:
INFO:     > Vendor:   ATI Technologies Inc.
INFO:     > Renderer: AMD Radeon(TM) 780M
INFO:     > Version:  3.3.0 Core Profile Context 24.30.74.250617
INFO:     > GLSL:     4.60
INFO: GL: VAO extension detected, VAO functions loaded successfully
INFO: GL: NPOT textures extension detected, full NPOT textures supported
INFO: GL: DXT compressed textures supported
INFO: GL: ETC2/EAC compressed textures supported
INFO: PLATFORM: DESKTOP (GLFW - Win32): Initialized successfully
INFO: TEXTURE: [ID 1] Texture loaded successfully (1x1 | R8G8B8A8 | 1 mipmaps)
INFO: TEXTURE: [ID 1] Default texture loaded successfully
INFO: SHADER: [ID 1] Vertex shader compiled successfully
INFO: SHADER: [ID 2] Fragment shader compiled successfully
INFO: SHADER: [ID 3] Program shader loaded successfully
INFO: SHADER: [ID 3] Default shader loaded successfully
INFO: RLGL: Render batch vertex buffers loaded successfully in RAM (CPU)
INFO: RLGL: Render batch vertex buffers loaded successfully in VRAM (GPU)
INFO: RLGL: Default OpenGL state initialized successfully
INFO: TEXTURE: [ID 2] Texture loaded successfully (128x128 | GRAY_ALPHA | 1 mipmaps)
INFO: FONT: Default font loaded successfully (224 glyphs)
INFO: SYSTEM: Working Directory: C:\raylib\raylib\examples\others
INFO: FILEIO: [resources/shaders/glsl430/gol.glsl] Text file loaded successfully
WARNING: SHADER: Compute shaders not enabled. Define GRAPHICS_API_OPENGL_43
WARNING: SHADER: Compute shaders not enabled. Define GRAPHICS_API_OPENGL_43
INFO: FILEIO: [resources/shaders/glsl430/gol_render.glsl] Text file loaded successfully
INFO: SHADER: [ID 5] Fragment shader compiled successfully
INFO: SHADER: [ID 6] Program shader loaded successfully
INFO: FILEIO: [resources/shaders/glsl430/gol_transfert.glsl] Text file loaded successfully
WARNING: SHADER: Compute shaders not enabled. Define GRAPHICS_API_OPENGL_43
WARNING: SHADER: Compute shaders not enabled. Define GRAPHICS_API_OPENGL_43
WARNING: SSBO: SSBO not enabled. Define GRAPHICS_API_OPENGL_43
WARNING: SSBO: SSBO not enabled. Define GRAPHICS_API_OPENGL_43
WARNING: SSBO: SSBO not enabled. Define GRAPHICS_API_OPENGL_43
INFO: TEXTURE: [ID 3] Texture loaded successfully (768x768 | R8G8B8A8 | 1 mipmaps)

It says "Define GRAPHICS_API_OPENGL_43", but I'm not sure how to do that?
I've already tried setting it in rlgl.h and CMakeLists.txt as the comment I linked.

[raysan5]

@Steelsmasher I'm afraid that version is highly outdated, you should always test against raylib master branch. If there was any issue in the past, it's already fixed.

[Steelsmasher]

Ok, I downloaded the master branch. Replaced the raylib folder in the C drive and ran the program through Notepad++.
The output log is exactly the same, except for the PID numbers.

[raysan5]

@Steelsmasher that's because you are not recompiling and linking latest raylib version

[Steelsmasher]

Thanks, it works. Didn't realise I can set the OpenGL version in the Notepad++ source_compile script