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550 lines
19 KiB
V
550 lines
19 KiB
V
// Copyright (c) 2021 Lars Pontoppidan. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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//
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// vgret (V Graphics REgression Tool) aids in generating screenshots of various graphical `gg`
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// based V applications, in a structured directory hierarchy, with the intent of either:
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// * Generate a directory structure of screenshots/images to test against
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// (which, as an example, could later be pushed to a remote git repository)
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// * Test for *visual* differences between two, structurally equal, directories
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//
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// vgret uses features and applications that is currently only available on Linux based distros:
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// idiff : `sudo apt install openimageio-tools` to programmatically find *visual* differences between two images.
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//
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// For developers:
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// For a quick overview of the generated images you can use `montage` from imagemagick to generate a "Contact Sheet":
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// montage -verbose -label '%f' -font Helvetica -pointsize 10 -background '#000000' -fill 'gray' -define jpeg:size=200x200 -geometry 200x200+2+2 -auto-orient $(fd -t f . /path/to/vgret/out/dir) /tmp/montage.jpg
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//
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// To generate the reference images locally - or for uploading to a remote repo like `gg-regression-images`
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// You can do the following:
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// 1. `export DISPLAY=:99` # Start all graphical apps on DISPLAY 99
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// 2. `Xvfb $DISPLAY -screen 0 1280x1024x24 &` # Starts a virtual X11 screen buffer
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// 3. `v gret -v /tmp/gg-regression-images` # Generate reference images to /tmp/gg-regression-images
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// 4. `v gret -v /tmp/test /tmp/gg-regression-images` # Test if the tests can pass locally by comparing to a fresh imageset
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// 5. Visually check the images (you can get an overview by running the `montage` command above)
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// 6. Upload to GitHub or keep locally for more testing/tweaking
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//
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// It's a known factor that the images generated on a local machine won't match the images generated on a remote machine by 100%.
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// They will most likely differ by a small percentage - the comparison tool can be tweaked to accept these subtle changes,
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// at the expense of slightly more inaccurate test results. For non-animated apps the percentage should be > 0.01.
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// You can emulate or test these inaccuracies to some extend locally by simply running the test from a terminal using
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// your physical X11 session display (Usually DISPLAY=:0).
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//
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// Read more about the options of `idiff` here: https://openimageio.readthedocs.io/en/latest/idiff.html
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//
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import os
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import flag
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import time
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import toml
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const (
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tool_name = 'vgret'
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tool_version = '0.0.2'
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tool_description = '\n Dump and/or compare rendered frames of graphical apps
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both external and `gg` based apps is supported.
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Examples:
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Generate screenshots to `/tmp/test`
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v gret /tmp/test
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Generate and compare screenshots in `/tmp/src` to existing screenshots in `/tmp/dst`
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v gret /tmp/src /tmp/dst
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Compare screenshots in `/tmp/src` to existing screenshots in `/tmp/dst`
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v gret --compare-only /tmp/src /tmp/dst
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'
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tmp_dir = os.join_path(os.vtmp_dir(), 'v', tool_name)
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runtime_os = os.user_os()
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v_root = os.real_path(@VMODROOT)
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)
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const (
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supported_hosts = ['linux']
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supported_capture_methods = ['gg_record', 'generic_screenshot']
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// External tool executables
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v_exe = os.getenv('VEXE')
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idiff_exe = os.find_abs_path_of_executable('idiff') or { '' }
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)
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const (
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embedded_toml = $embed_file('vgret.defaults.toml', .zlib)
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default_toml = embedded_toml.to_string()
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empty_toml_array = []toml.Any{}
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empty_toml_map = map[string]toml.Any{}
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)
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struct Config {
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path string
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mut:
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apps []AppConfig
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}
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struct CompareOptions {
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mut:
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method string = 'idiff'
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flags []string
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}
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struct CaptureRegion {
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mut:
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x int
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y int
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width int
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height int
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}
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fn (cr CaptureRegion) is_empty() bool {
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return cr.width == 0 && cr.height == 0
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}
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struct CaptureOptions {
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mut:
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method string = 'gg_record'
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wait_ms int // used by "generic_screenshot" to wait X milliseconds *after* execution of the app
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flags []string
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regions []CaptureRegion
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env map[string]string
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}
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fn (co CaptureOptions) validate() ! {
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if co.method !in supported_capture_methods {
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return error('capture method "${co.method}" is not supported. Supported methods are: ${supported_capture_methods}')
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}
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}
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struct AppConfig {
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compare CompareOptions
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capture CaptureOptions
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path string
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abs_path string
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mut:
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screenshots_path string
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screenshots []string
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}
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struct Options {
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verbose bool
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compare_only bool
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root_path string
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mut:
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config Config
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}
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fn (opt Options) verbose_execute(cmd string) os.Result {
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opt.verbose_eprintln('Running `${cmd}`')
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return os.execute(cmd)
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}
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fn (opt Options) verbose_eprintln(msg string) {
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if opt.verbose {
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eprintln(msg)
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}
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}
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fn main() {
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if runtime_os !in supported_hosts {
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eprintln('${tool_name} is currently only supported on ${supported_hosts} hosts')
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exit(1)
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}
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if os.args.len == 1 {
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eprintln('Usage: ${tool_name} PATH \n${tool_description}\n${tool_name} -h for more help...')
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exit(1)
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}
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mut fp := flag.new_flag_parser(os.args[1..])
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fp.application(tool_name)
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fp.version(tool_version)
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fp.description(tool_description)
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fp.arguments_description('PATH [PATH]')
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fp.skip_executable()
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show_help := fp.bool('help', `h`, false, 'Show this help text.')
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// Collect tool options
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mut opt := Options{
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verbose: fp.bool('verbose', `v`, false, "Be verbose about the tool's progress.")
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compare_only: fp.bool('compare-only', `c`, false, "Don't generate screenshots - only compare input directories")
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root_path: fp.string('root-path', `r`, v_root, 'Root path of the comparison')
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}
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toml_conf := fp.string('toml-config', `t`, default_toml, 'Path or string with TOML configuration')
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arg_paths := fp.finalize()!
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if show_help {
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println(fp.usage())
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exit(0)
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}
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if arg_paths.len == 0 {
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println(fp.usage())
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println('\nError missing arguments')
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exit(1)
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}
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if !os.exists(tmp_dir) {
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os.mkdir_all(tmp_dir)!
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}
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opt.config = new_config(opt.root_path, toml_conf) or { panic(err) }
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gen_in_path := arg_paths[0]
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if arg_paths.len >= 1 {
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generate_screenshots(mut opt, gen_in_path) or { panic(err) }
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}
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if arg_paths.len > 1 {
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target_path := arg_paths[1]
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path := opt.config.path
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all_paths_in_use := [path, gen_in_path, target_path]
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for path_in_use in all_paths_in_use {
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if !os.is_dir(path_in_use) {
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eprintln('`${path_in_use}` is not a directory')
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exit(1)
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}
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}
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if path == target_path || gen_in_path == target_path || gen_in_path == path {
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eprintln('Compare paths can not be the same directory `${path}`/`${target_path}`/`${gen_in_path}`')
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exit(1)
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}
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compare_screenshots(opt, gen_in_path, target_path)!
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}
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}
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fn generate_screenshots(mut opt Options, output_path string) ! {
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path := opt.config.path
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dst_path := output_path.trim_right('/')
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if !os.is_dir(path) {
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return error('`${path}` is not a directory')
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}
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for mut app_config in opt.config.apps {
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file := app_config.path
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app_path := app_config.abs_path
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mut rel_out_path := ''
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if os.is_file(app_path) {
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rel_out_path = os.dir(file)
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} else {
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rel_out_path = file
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}
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if app_config.capture.method == 'gg_record' {
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opt.verbose_eprintln('Compiling shaders (if needed) for `${file}`')
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sh_result := opt.verbose_execute('${os.quoted_path(v_exe)} shader ${os.quoted_path(app_path)}')
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if sh_result.exit_code != 0 {
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opt.verbose_eprintln('Skipping shader compile for `${file}` v shader failed with:\n${sh_result.output}')
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continue
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}
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}
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if !os.exists(dst_path) {
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opt.verbose_eprintln('Creating output path `${dst_path}`')
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os.mkdir_all(dst_path) or { return error('Failed making directory `${dst_path}`') }
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}
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screenshot_path := os.join_path(dst_path, rel_out_path)
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if !os.exists(screenshot_path) {
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os.mkdir_all(screenshot_path) or {
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return error('Failed making screenshot path `${screenshot_path}`')
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}
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}
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app_config.screenshots_path = screenshot_path
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app_config.screenshots = take_screenshots(opt, app_config) or {
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return error('Failed taking screenshots of `${app_path}`:\n${err.msg()}')
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}
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}
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}
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fn compare_screenshots(opt Options, output_path string, target_path string) ! {
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mut fails := map[string]string{}
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mut warns := map[string]string{}
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for app_config in opt.config.apps {
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screenshots := app_config.screenshots
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opt.verbose_eprintln('Comparing ${screenshots.len} screenshots in `${output_path}` with `${target_path}`')
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for screenshot in screenshots {
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relative_screenshot := screenshot.all_after(output_path + os.path_separator)
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src := screenshot
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target := os.join_path(target_path, relative_screenshot)
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opt.verbose_eprintln('Comparing `${src}` with `${target}` with ${app_config.compare.method}')
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if app_config.compare.method == 'idiff' {
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if idiff_exe == '' {
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return error('${tool_name} need the `idiff` tool installed. It can be installed on Ubuntu with `sudo apt install openimageio-tools`')
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}
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diff_file := os.join_path(os.vtmp_dir(), os.file_name(src).all_before_last('.') +
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'.diff.tif')
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flags := app_config.compare.flags.join(' ')
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diff_cmd := '${os.quoted_path(idiff_exe)} ${flags} -abs -od -o ${os.quoted_path(diff_file)} -abs ${os.quoted_path(src)} ${os.quoted_path(target)}'
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result := opt.verbose_execute(diff_cmd)
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if result.exit_code == 0 {
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opt.verbose_eprintln('OUTPUT: \n${result.output}')
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}
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if result.exit_code != 0 {
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eprintln('OUTPUT: \n${result.output}')
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if result.exit_code == 1 {
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warns[src] = target
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} else {
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fails[src] = target
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}
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}
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}
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}
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}
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if warns.len > 0 {
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eprintln('--- WARNINGS ---')
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eprintln('The following files had warnings when compared to their targets')
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for warn_src, warn_target in warns {
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eprintln('${warn_src} ~= ${warn_target}')
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}
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}
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if fails.len > 0 {
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eprintln('--- ERRORS ---')
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eprintln('The following files did not match their targets')
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for fail_src, fail_target in fails {
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eprintln('${fail_src} != ${fail_target}')
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}
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first := fails.keys()[0]
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fail_copy := os.join_path(os.vtmp_dir(), 'fail.' + first.all_after_last('.'))
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os.cp(first, fail_copy)!
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eprintln('First failed file `${first}` is copied to `${fail_copy}`')
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diff_file := os.join_path(os.vtmp_dir(), os.file_name(first).all_before_last('.') +
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'.diff.tif')
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diff_copy := os.join_path(os.vtmp_dir(), 'diff.tif')
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if os.is_file(diff_file) {
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os.cp(diff_file, diff_copy)!
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eprintln('First failed diff file `${diff_file}` is copied to `${diff_copy}`')
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eprintln('Removing alpha channel from ${diff_copy} ...')
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final_fail_result_file := os.join_path(os.vtmp_dir(), 'diff.png')
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opt.verbose_execute('convert ${os.quoted_path(diff_copy)} -alpha off ${os.quoted_path(final_fail_result_file)}')
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eprintln('Final diff file: `${final_fail_result_file}`')
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}
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exit(1)
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}
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}
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fn take_screenshots(opt Options, app AppConfig) ![]string {
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out_path := app.screenshots_path
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if !opt.compare_only {
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opt.verbose_eprintln('Taking screenshot(s) of `${app.path}` to `${out_path}`')
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match app.capture.method {
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'gg_record' {
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for k, v in app.capture.env {
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rv := v.replace('\$OUT_PATH', out_path)
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opt.verbose_eprintln('Setting ENV `${k}` = ${rv} ...')
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os.setenv('${k}', rv, true)
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}
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flags := app.capture.flags.join(' ')
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result := opt.verbose_execute('${os.quoted_path(v_exe)} ${flags} -d gg_record run ${os.quoted_path(app.abs_path)}')
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if result.exit_code != 0 {
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return error('Failed taking screenshot of `${app.abs_path}`:\n${result.output}')
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}
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}
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'generic_screenshot' {
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for k, v in app.capture.env {
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rv := v.replace('\$OUT_PATH', out_path)
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opt.verbose_eprintln('Setting ENV `${k}` = ${rv} ...')
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os.setenv('${k}', rv, true)
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}
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existing_screenshots := get_app_screenshots(out_path, app)!
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flags := app.capture.flags
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if !os.exists(app.abs_path) {
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return error('Failed starting app `${app.abs_path}`, the path does not exist')
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}
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opt.verbose_eprintln('Running ${app.abs_path} ${flags}')
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mut p_app := os.new_process(app.abs_path)
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p_app.set_args(flags)
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p_app.set_redirect_stdio()
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p_app.run()
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if !p_app.is_alive() {
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output := p_app.stdout_read() + '\n' + p_app.stderr_read()
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return error('Failed starting app `${app.abs_path}` (before screenshot):\n${output}')
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}
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if app.capture.wait_ms > 0 {
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opt.verbose_eprintln('Waiting ${app.capture.wait_ms} before capturing')
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time.sleep(app.capture.wait_ms * time.millisecond)
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}
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if !p_app.is_alive() {
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output := p_app.stdout_slurp() + '\n' + p_app.stderr_slurp()
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return error('App `${app.abs_path}` exited (${p_app.code}) before a screenshot could be captured:\n${output}')
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}
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// Use ImageMagick's `import` tool to take the screenshot
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out_file := os.join_path(out_path, os.file_name(app.path) +
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'_screenshot_${existing_screenshots.len:02}.png')
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result := opt.verbose_execute('import -window root "${out_file}"')
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if result.exit_code != 0 {
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p_app.signal_kill()
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return error('Failed taking screenshot of `${app.abs_path}` to "${out_file}":\n${result.output}')
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}
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// When using regions the capture is split up into regions.len
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// And name the output based on each region's properties
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if app.capture.regions.len > 0 {
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for region in app.capture.regions {
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region_id := 'x${region.x}y${region.y}w${region.width}h${region.height}'
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region_out_file := os.join_path(out_path, os.file_name(app.path) +
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'_screenshot_${existing_screenshots.len:02}_region_${region_id}.png')
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// If the region is empty (w, h == 0, 0) infer a full screenshot,
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// This allows for capturing both regions *and* the complete screen
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if region.is_empty() {
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os.cp(out_file, region_out_file) or {
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return error('Failed copying original screenshot "${out_file}" to region file "${region_out_file}"')
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}
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continue
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}
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extract_result := opt.verbose_execute('convert -extract ${region.width}x${region.height}+${region.x}+${region.y} "${out_file}" "${region_out_file}"')
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if extract_result.exit_code != 0 {
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p_app.signal_kill()
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return error('Failed extracting region ${region_id} from screenshot of `${app.abs_path}` to "${region_out_file}":\n${result.output}')
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}
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}
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// When done, remove the original file that was split into regions.
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opt.verbose_eprintln('Removing "${out_file}" (region mode)')
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os.rm(out_file) or {
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return error('Failed removing original screenshot "${out_file}"')
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}
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}
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p_app.signal_kill()
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}
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else {
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return error('Unsupported capture method "${app.capture.method}"')
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}
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}
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}
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return get_app_screenshots(out_path, app)!
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}
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fn get_app_screenshots(path string, app AppConfig) ![]string {
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mut screenshots := []string{}
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shots := os.ls(path) or { return error('Failed listing dir `${path}`') }
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for shot in shots {
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if shot.starts_with(os.file_name(app.path).all_before_last('.')) {
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screenshots << os.join_path(path, shot)
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}
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}
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return screenshots
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}
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fn new_config(root_path string, toml_config string) !Config {
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doc := if os.is_file(toml_config) {
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toml.parse_file(toml_config) or { return error(err.msg()) }
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} else {
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toml.parse_text(toml_config) or { return error(err.msg()) }
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}
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path := os.real_path(root_path).trim_right('/')
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compare_method := doc.value('compare.method').default_to('idiff').string()
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compare_flags := doc.value('compare.flags').default_to(empty_toml_array).array().as_strings()
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default_compare := CompareOptions{
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method: compare_method
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flags: compare_flags
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}
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capture_method := doc.value('capture.method').default_to('gg_record').string()
|
|
capture_flags := doc.value('capture.flags').default_to(empty_toml_array).array().as_strings()
|
|
capture_regions_any := doc.value('capture.regions').default_to(empty_toml_array).array()
|
|
mut capture_regions := []CaptureRegion{}
|
|
for capture_region_any in capture_regions_any {
|
|
region := CaptureRegion{
|
|
x: capture_region_any.value('x').default_to(0).int()
|
|
y: capture_region_any.value('y').default_to(0).int()
|
|
width: capture_region_any.value('width').default_to(0).int()
|
|
height: capture_region_any.value('height').default_to(0).int()
|
|
}
|
|
capture_regions << region
|
|
}
|
|
capture_wait_ms := doc.value('capture.wait_ms').default_to(0).int()
|
|
capture_env := doc.value('capture.env').default_to(empty_toml_map).as_map()
|
|
mut env_map := map[string]string{}
|
|
for k, v in capture_env {
|
|
env_map[k] = v.string()
|
|
}
|
|
default_capture := CaptureOptions{
|
|
method: capture_method
|
|
wait_ms: capture_wait_ms
|
|
flags: capture_flags
|
|
regions: capture_regions
|
|
env: env_map
|
|
}
|
|
|
|
apps_any := doc.value('apps').default_to(empty_toml_array).array()
|
|
mut apps := []AppConfig{cap: apps_any.len}
|
|
for app_any in apps_any {
|
|
rel_path := app_any.value('path').string().trim_right('/')
|
|
|
|
// Merge, per app, overwrites
|
|
mut merged_compare := CompareOptions{}
|
|
merged_compare.method = app_any.value('compare.method').default_to(default_compare.method).string()
|
|
merged_compare_flags := app_any.value('compare.flags').default_to(empty_toml_array).array().as_strings()
|
|
if merged_compare_flags.len > 0 {
|
|
merged_compare.flags = merged_compare_flags
|
|
} else {
|
|
merged_compare.flags = default_compare.flags
|
|
}
|
|
|
|
mut merged_capture := CaptureOptions{}
|
|
merged_capture.method = app_any.value('capture.method').default_to(default_capture.method).string()
|
|
merged_capture_flags := app_any.value('capture.flags').default_to(empty_toml_array).array().as_strings()
|
|
if merged_capture_flags.len > 0 {
|
|
merged_capture.flags = merged_capture_flags
|
|
} else {
|
|
merged_capture.flags = default_capture.flags
|
|
}
|
|
|
|
app_capture_regions_any := app_any.value('capture.regions').default_to(empty_toml_array).array()
|
|
mut app_capture_regions := []CaptureRegion{}
|
|
for capture_region_any in app_capture_regions_any {
|
|
region := CaptureRegion{
|
|
x: capture_region_any.value('x').default_to(0).int()
|
|
y: capture_region_any.value('y').default_to(0).int()
|
|
width: capture_region_any.value('width').default_to(0).int()
|
|
height: capture_region_any.value('height').default_to(0).int()
|
|
}
|
|
app_capture_regions << region
|
|
}
|
|
mut merged_capture_regions := []CaptureRegion{}
|
|
for default_capture_region in default_capture.regions {
|
|
if default_capture_region !in app_capture_regions {
|
|
merged_capture_regions << default_capture_region
|
|
}
|
|
}
|
|
for app_capture_region in app_capture_regions {
|
|
if app_capture_region !in default_capture.regions {
|
|
merged_capture_regions << app_capture_region
|
|
}
|
|
}
|
|
merged_capture.regions = merged_capture_regions
|
|
|
|
merged_capture.wait_ms = app_any.value('capture.wait_ms').default_to(default_capture.wait_ms).int()
|
|
merge_capture_env := app_any.value('capture.env').default_to(empty_toml_map).as_map()
|
|
mut merge_env_map := default_capture.env.clone()
|
|
for k, v in merge_capture_env {
|
|
merge_env_map[k] = v.string()
|
|
}
|
|
for k, v in merge_env_map {
|
|
merged_capture.env[k] = v
|
|
}
|
|
|
|
merged_capture.validate()!
|
|
|
|
app_config := AppConfig{
|
|
compare: merged_compare
|
|
capture: merged_capture
|
|
path: rel_path
|
|
abs_path: os.join_path(path, rel_path).trim_right('/')
|
|
}
|
|
apps << app_config
|
|
}
|
|
|
|
return Config{
|
|
apps: apps
|
|
path: path
|
|
}
|
|
}
|