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This commit is contained in:
Tanishq Dubey 2024-06-16 17:18:35 -04:00
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# tview
> A (relatively) fast, lightweight, and useful image viewer.
# How to Build
![[main.png]]
## Windows with Visual Studio's IDE
# Features
- Supports most common image formats
- EXIF Viewing
- Histogram Calculation
- Toggle image filtering
- Pixel level details
- Color tooltip
# Gallery
## Tooltip
Toggle the tooltip by pressing `t`
![[tooltip.png]]
## Detail Views
Toggle detail modes by pressing `d`
Use the provided project file (.vcxproj). Add to solution (imgui_examples.sln) if necessary.
| Normal Arrow | Hex Color | RGB 255 Color | RGB Float Color |
| --------------------- | ------------------- | ----------------------- | ------------------------- |
| ![[detail_arrow.png]] | ![[detail_hex.png]] | ![[detail_rgb_int.png]] | ![[detail_rgb_float.png]] |
## Image Filtering
Toggle Filtering by pressing
## Windows with Visual Studio's CLI
| Filtering Off | Filtering On |
| ---------------------- | --------------------- |
| ![[filtering_off.png]] | ![[filtering_on.png]] |
# Usage
`tview PATH/TO/IMAGE`
Use build_win32.bat or directly:
Press `h` to show the help dialog within the program.
## Mouse
Scroll to zoom.
Click and drag to pan.
## Keyboard
- `h` - Show help
- `c`- Toggle Histogram
- `e`- Toggle EXIF data
- `d`- Cycle [[#Detail Views]] (default off)
- `a` - Toggle image filtering (default off)
- `g` - Toggle grid (only visible at pixel level)
- `r`- Rotate image 90 degrees clockwise
- `q` - Quit
# Installing
## Requirements to Run
- SDL2
- OpenGL
- Libexiv2
## Requirements to build
In addition to the run requirements
- CMake
- C++ Compiler (g++/clang++)
### On Ubuntu
```
set SDL2_DIR=path_to_your_sdl2_folder
cl /Zi /MD /utf-8 /I.. /I..\.. /I%SDL2_DIR%\include main.cpp ..\..\backends\imgui_impl_sdl2.cpp ..\..\backends\imgui_impl_opengl3.cpp ..\..\imgui*.cpp /FeDebug/example_sdl2_opengl3.exe /FoDebug/ /link /libpath:%SDL2_DIR%\lib\x86 SDL2.lib SDL2main.lib opengl32.lib /subsystem:console
# ^^ include paths ^^ source files ^^ output exe ^^ output dir ^^ libraries
# or for 64-bit:
cl /Zi /MD /utf-8 /I.. /I..\.. /I%SDL2_DIR%\include main.cpp ..\..\backends\imgui_impl_sdl2.cpp ..\..\backends\imgui_impl_opengl3.cpp ..\..\imgui*.cpp /FeDebug/example_sdl2_opengl3.exe /FoDebug/ /link /libpath:%SDL2_DIR%\lib\x64 SDL2.lib SDL2main.lib opengl32.lib /subsystem:console
apt install --no-install-recommends build-essential cmake libsdl2-dev libexiv2-dev mesa-utils
```
### On Debian
```
apt install --no-install-recommends build-essential cmake libsdl2-dev libexiv2-dev mesa-utils
```
### On Arch
```
pacman -Sy sdl2 mesa-utils exiv2 cmake base-devel
```
## Linux and similar Unixes
Use our Makefile or directly:
## Building
Clone the repository
```
c++ `sdl2-config --cflags` -I .. -I ../.. -I ../../backends
main.cpp ../../backends/imgui_impl_sdl2.cpp ../../backends/imgui_impl_opengl3.cpp ../../imgui*.cpp
`sdl2-config --libs` -lGL -ldl
git clone https://git.dws.rip/dubey/tview.git
```
## macOS
Use our Makefile or directly:
Change directory into the repository
```
brew install sdl2
c++ `sdl2-config --cflags` -I .. -I ../.. -I ../../backends
main.cpp ../../backends/imgui_impl_sdl2.cpp ../../backends/imgui_impl_opengl3.cpp ../../imgui*.cpp
`sdl2-config --libs` -framework OpenGl -framework CoreFoundation
cd tview
```
## Emscripten
Generate build files and trigger build
```
cmake .
cmake --build .
```
**Building**
You will now have a file called `tview` in the repository root, you can copy this into your path:
```
sudo mv ./tview /usr/local/bin/tview
```
You need to install Emscripten from https://emscripten.org/docs/getting_started/downloads.html, and have the environment variables set, as described in https://emscripten.org/docs/getting_started/downloads.html#installation-instructions
- Depending on your configuration, in Windows you may need to run `emsdk/emsdk_env.bat` in your console to access the Emscripten command-line tools.
- You may also refer to our [Continuous Integration setup](https://github.com/ocornut/imgui/tree/master/.github/workflows) for Emscripten setup.
- Then build using `make -f Makefile.emscripten` while in the current directory.
**Running an Emscripten project**
To run on a local machine:
- `make -f Makefile.emscripten serve` will use Python3 to spawn a local webserver, you can then browse http://localhost:8000 to access your build.
- Otherwise, generally you will need a local webserver. Quoting [https://emscripten.org/docs/getting_started](https://emscripten.org/docs/getting_started/Tutorial.html#generating-html):<br>
_"Unfortunately several browsers (including Chrome, Safari, and Internet Explorer) do not support file:// [XHR](https://emscripten.org/docs/site/glossary.html#term-xhr) requests, and cant load extra files needed by the HTML (like a .wasm file, or packaged file data as mentioned lower down). For these browsers youll need to serve the files using a [local webserver](https://emscripten.org/docs/getting_started/FAQ.html#faq-local-webserver) and then open http://localhost:8000/hello.html."_
- Emscripten SDK has a handy `emrun` command: `emrun web/index.html --browser firefox` which will spawn a temporary local webserver (in Firefox). See https://emscripten.org/docs/compiling/Running-html-files-with-emrun.html for details.
- You may use Python 3 builtin webserver: `python -m http.server -d web` (this is what `make serve` uses).
- You may use Python 2 builtin webserver: `cd web && python -m SimpleHTTPServer`.
- If you are accessing the files over a network, certain browsers, such as Firefox, will restrict Gamepad API access to secure contexts only (e.g. https only).
`tview` is now installed on your system

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