Shaderjoy
Description:	Display fragment shaders
Download:	shaderjoy.lha       (TIPS: Use the right click menu if your browser takes you back here all the time)
Size:	4Mb
Version:	1.11
Date:	04 Jul 2020
Author:	Juha Niemimaki
Submitter:	Juha Niemimaki
Homepage:	http://capehill.kapsi.fi
Requirements:	OpenGL ES 2.0, Warp3D Nova
Category:	graphics/viewer
Replaces:	graphics/viewer/shaderjoy.lha
License:	Freeware
Distribute:	yes
Min OS Version:	4.1
FileID:	11357
Snapshots:   Videos:
Comments:	4
Snapshots:	1
Videos:	1
Downloads:	49  (Current version)
	212  (Accumulated)
Votes:	14 (2/0)  (30 days/7 days)

# Shaderjoy 1.11

Prototype OpenGL shader code or create digital art on AmigaOS 4!

Shaderjoy allows you to display Shadertoy (https://www.shadertoy.com) compatible
fragment shaders. Fragment shaders (sometimes called pixel shaders) are programs
that are executed per fragment (pixel) on the GPU.


## Requirements

Ogles2.library 2.11.

Warp3D Nova 1.68.


## Usage

- Load/Save/Create new shader using RMB menu.
- Reload shader using RMB menu or 'r' key.
- Drop shader file (.frag) into the window.
- Load texture channel using RMB menu.
- Select VSYNC method using RMB menu.
- Toggle fullscreen mode with LMB double-click, using RMB menu or 'f' key.
- Toggle FPS counter using RMB menu.
- Toggle verbose logging using RMB menu.
- Toggle special shader debug logging using RMB menu (requires ogles2.library
version 3).
- Toggle pause mode with SPACE key.


## Vertical sync method

- WaitTOF: interrupt-based (*)
- WaitBOVP: busyloop (*)
- Disabled: do not limit frame rate

*) as explained in the Graphics.library Autodoc.


## Supported uniform variables

- vec3 iResolution: the window size in pixels (xy).
- vec4 iMouse: x/y have the mouse coordinate if LMB is pressed, z/w have the
original mouse coordinate when "dragging" started.
- float iTime: second.microsecond.
- float iTimeDelta
- float iFrame: current frame number, starting from 0.
- float iFrameRate
- sampler2D iChannel0...3: texture.
- vec3 iChannelResolution[4]: texture width (x) and height (y).
- vec4 iDate: year (x), month (y), day (z) and seconds (w).


## Tooltypes

- VERBOSE: verbose logging.
- CHECKUNINITIALIZED: let ogles2.library find uninitialized variables in shader
code.
- SHADERDEBUG: enable detailed shader debug log.
- VSYNC: enable vertical sync.
- SHOWFPS: display FPS counter in fullscreen mode.
- FULLSCREEN: start in fullscreen mode.
- EDITORVIEW: enable shader code editor in window mode.
- SCREENMODE: override system resolution in fullscreen mode.
- FONTNAME: editor font name.
- FONTSIZE: editor font size.
- EDITORNAME: external editor, for example NotePad.


## Known issues

- Many Shadertoy shaders don't work properly:
  - Future driver update will improve situation.
  - Some shaders rely on undefined behaviour.


## TODO

- Texture wrapping, flipping and repeat parameters
- Texture generation
- Audio support
- Better Shadertoy compatibility


## Changes

1.11
- Fix issue with texteditor.gadget creation (caused by missing OpenClass calls).
- Combine Play and Pause buttons.
- Display FPS and time info in a separate GUI element instead of window title
bar.
- Monitor shader source file and reload it on change.
- Add Control menu (Play/Pause, Rewind, Compile).
- Rename EDITOR tooltype to EDITORVIEW.

1.10
- Add tooltype EDITOR. When enabled, allow editing in window mode.
- Add tooltype FONTNAME and FONTSIZE, to configure editor font.
- Add tooltype EDITORNAME, to define external editor tool.
- Blank mouse pointer in fullscreen mode, when mouse is inactive.
- Allow pause mode toggling with SPACE key.
- Unpause when loading a shader.
- Update display also during pause mode, but on a slower rate.
- Re-enable reload functionality.

1.9
- Allow shader editing in window mode.
- Add play, pause, rewind and compile buttons in window mode.
- Allow saving of shaders.
- Remember window size when coming back from fullscreen mode.
- Add possibility to check uninitialized variables (requires ogles2.library
version 3).
- Add tooltype CHECKUNINITIALIZED.
- Add possibility to dump verbose Nova-level compilation logs (requires
ogles2.library version 3).
- Add tooltype SHADERDEBUG.
- Log shader info log always when available (in verbose mode).
- Time and log shader compilation (when in verbose mode).
- Remove possibility to reload shader.

1.8
- Use vertex buffer objects (VBOs).
- Add iTimeDelta and iFrameRate uniforms.
- Add AppWindow support: shaders can be dropped into the window.
- Shader filename can be passed as an argument.
- Improve About box: display GL information.
- Fix issue with blitting over window borders.
- Initialize fragment colour because some shaders do not.
- Reverse iMouse.y.

1.7
- Open all screens with SA_LikeWorkbench tag.
- Disable optimized bitmap allocation.
- Log OpenGL information during startup.
- Display version number on screen title bar.
- Fix an issue where FPS counter was not visible when started in fullscreen
mode.

1.6
- Improve VSYNC mechanism.
- Remove FPS counter flickering in fullscreen mode.
- Allow toggling of FPS counter.
- Add SHOWFPS tooltype.
- Add SCREENMODE tooltype.
- Disable Iconify menu option in fullscreen mode.
- Drop command-line argument support in favor of icon tooltypes.

1.5
- Fullscreen mode. Created using SA_LikeWorkbench so it's likely larger and
slower than default window mode!
- Improve logger: buffer is no more limited to 16 kilobytes.
- Change default texture path to "textures/shadertoy" for improve usage.
- User-selectable VSYNC mode (WaitTOF, WaitBOVP or disabled).
- Change default window size to 800 x 450.
- Display running time on window title bar.
- Display window size on window title bar.
- Use window pointer in ASL requesters.
- Add FULLSCREEN tooltype.

1.4
- Add icon tooltypes.

1.3
- Add iDate support.
- Add verbose logging.
- Fix: window pointer is now cleared when close gadget is used.
- Keep textures (iChannels) active when switching shaders.

1.2
- Fix: iChannelResolution is an array of vec3s.
- Workaround: use GL_LINEAR texture filtering to avoid diagonal line where
triangles meet.

1.1
- Add iChannel0...3 texture support. Each channel must be loaded manually at the
moment.
- Add iChannelResolution0...3 support.
- Add stack cookie and log stack usage at the exit.
- Display a message box in case shader or texture loading fails, instead of
exiting.

1.0
- First version