Changes:

- renamed to kageviewer to match with repository name
- automatically determine shader size when needed
- added Time uniform
- don't provide binary releases anymore

.gitignore

@@ -1,2 +1,2 @@
 releases
-kage-viewer
+kageviewer

Makefile

@@ -16,7 +16,7 @@
 
 #
 # no need to modify anything below
-tool      = kage-viewer
+tool      = kageviewer
 VERSION   = $(shell grep VERSION config.go | head -1 | cut -d '"' -f2)
 archs     = darwin freebsd linux windows
 PREFIX    = /usr/local
@@ -44,7 +44,7 @@ shader-destruct: buildlocal
 	./$(tool) -g 32x32 -i example/wall.png -i example/damage.png --map-ticks Time -s example/destruct.kage
 
 shader-ebiten: buildlocal
-	./$(tool) -g 640x480 --map-ticks Time --map-mouse Cursor -s example/ebiten.kage
+	./$(tool) -g 640x480 --map-mouse Cursor -s example/ebiten.kage
 
 test: clean
 	mkdir -p t/out
@@ -75,12 +75,12 @@ goupdate:
 buildall:
 	./mkrel.sh $(tool) $(VERSION)
 
-release: buildall
+release:
 	gh release create v$(VERSION) --generate-notes releases/*
 
 show-versions: buildlocal
-	@echo "### kage-viewer version:"
+	@echo "### kageviewer version:"
-	@./kage-viewer -V
+	@./kageviewer -V
 
 	@echo
 	@echo "### go module versions:"

README.md

@@ -1,14 +1,14 @@
-# kage-viewer - Viewer for shaders written in Kage, similar to glslviewer
+# kageviewer - Viewer for shaders written in Kage, similar to glslviewer
 
 ![Logo](https://github.com/TLINDEN/kageviewer/blob/main/.github/assets/logo.png)
 
-[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://github.com/tlinden/kage-viewer/blob/master/LICENSE)
+[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://github.com/tlinden/kageviewer/blob/master/LICENSE)
-[![Go Report Card](https://goreportcard.com/badge/github.com/tlinden/kage-viewer)](https://goreportcard.com/report/github.com/tlinden/kage-viewer) 
+[![Go Report Card](https://goreportcard.com/badge/github.com/tlinden/kageviewer)](https://goreportcard.com/report/github.com/tlinden/kageviewer) 
 
 This   little  tool   can  be   used  to   test  shaders   written  in
 [Kage](https://ebitengine.org/en/documents/shader.html), a shader meta
 language for
-[Ebitengine](https://github.com/hajimehoshi/ebiten). kage-viewer
+[Ebitengine](https://github.com/hajimehoshi/ebiten). kageviewer
 reloads changed assets, which allows you to develop your shader and
 see live, how it responds to your changes. If loading fails, an error
 will be printed to STDOUT. The same applies for images.
@@ -19,35 +19,13 @@ will be printed to STDOUT. The same applies for images.
 
 ## Installation
 
-The tool does not have any dependencies.  Just download the binary for
+Since `kageviewer` is primarily aimed at golang game developers, no
-your platform from the releases page and you're good to go.
+pre built binaries are provided.
 
-### Installation using a pre-compiled binary
+### Installation with go
-
-Go to the [latest release page](https://github.com/TLINDEN/kage-viewer/releases/latest)
-and look for your OS and platform. There are two options to install the binary:
-
-Directly     download     the     binary    for     your     platform,
-e.g. `kage-viewer-linux-amd64-0.0.2`, rename it to `kage-viewer` (or whatever
-you like more!)  and put it into  your bin dir (e.g. `$HOME/bin` or as
-root to `/usr/local/bin`).
-
-Be sure  to verify  the signature  of the binary  file. For  this also
-download the matching `kage-viewer-linux-amd64-0.0.2.sha256` file and:
 
 ```shell
-cat kage-viewer-linux-amd64-0.0.2.sha25 && sha256sum kage-viewer-linux-amd64-0.0.2
+go install github.com/tlinden/kageviewer@latest
-```
-You should see the same SHA256 hash.
-
-You  may  also download  a  binary  tarball  for your  platform,  e.g.
-`kage-viewer-linux-amd64-0.0.2.tar.gz`,  unpack and  install it.  GNU Make  is
-required for this:
-   
-```shell
-tar xvfz kage-viewer-linux-amd64-0.0.2.tar.gz
-cd kage-viewer-linux-amd64-0.0.2
-sudo make install
 ```
 
 ### Installation from source
@@ -66,10 +44,10 @@ install`.
 # Usage
 
 ```shell
-kage-viewer -h
+kageviewer -h
-This is kage-viewer, a shader viewer.
+This is kageviewer, a shader viewer.
 
-Usage: kage-viewer [-vd] [-c <config file>] [-g geom] [-p geom] \
+Usage: kageviewer [-vd] [-c <config file>] [-g geom] [-p geom] \
        -i <image0.png> -i <image1.png> -s <shader.kage>
 
 Options:
@@ -81,9 +59,10 @@ Options:
 -b --background <png file>      Image to load as background
 -t --tps        <ticks/s>       At how many ticks per second to run
    --map-flag   <name>          Map Flag uniform to <name>
-   --map-ticks  <name>          Map Flag uniform to <name>
+   --map-ticks  <name>          Map Ticks uniform to <name>
-   --map-slider <name>          Map Flag uniform to <name>
+   --map-time   <name>          Map Time uniform to <name>
-   --map-mouse  <name>          Map Flag uniform to <name>
+   --map-slider <name>          Map Slider uniform to <name>
+   --map-mouse  <name>          Map Mouse uniform to <name>
 -d --debug                      Show debugging output
 -v --version                    Show program version
 ```
@@ -91,7 +70,7 @@ Options:
 Example usage using the provided example:
 
 ```shell
-kage-viewer -g 32x32 -i example/wall.png -i example/damage.png  -s example/destruct.kg
+kageviewer -g 32x32 -i example/wall.png -i example/damage.png  -s example/destruct.kg
 ```
 
 Hit `SPACE` or press the left mouse button to toggle the damage
@@ -108,15 +87,16 @@ Uniforms supported so far:
   `SPACE` or pusing the left mouse button
 - `var Slider float`: a normalized float value, you can increment it
   with `UP` or `DOWN`
-- `var Ticks float`: the time the game runs (ticks, not seconds!)
+- `var Time float`: the time the game runs (ticks / TPS)
+- `var Ticks float`: the number of updates happened so far
 - `var Mouse vec2`: the current mouse position
 
 If you want to test an existing shader and don't want to rename the
-uniforms, you can map the ones provided by **kage-viewer** to custom
+uniforms, you can map the ones provided by **kageviewer** to custom
 names using the `--map-*` options. For example:
 
 ```shell
-kage-viewer -g 640x480 --map-ticks Time --map-mouse Cursor examples/shader/default.go
+kageviewer -g 640x480 --map-ticks Time --map-mouse Cursor examples/shader/default.go
 ```
 
 This executes the example shader in the ebitenging source repository.
@@ -126,10 +106,10 @@ This executes the example shader in the ebitenging source repository.
 You can use a config file to store your own codes, once you found one
 you like. A configfile is searched in these locations in this order:
 
-* `/etc/kage-viewer.conf`
+* `/etc/kageviewer.conf`
-* `/usr/local/etc/kage-viewer.conf`
+* `/usr/local/etc/kageviewer.conf`
-* `$HOME/.config/kage-viewer/config`
+* `$HOME/.config/kageviewer/config`
-* `$HOME/.kage-viewer`
+* `$HOME/.kageviewer`
 
 You may also specify a config file on the commandline using the `-c`
 flag.
@@ -148,7 +128,7 @@ Possible parameters equal the long command line options.
 
 # Report bugs
 
-[Please open an issue](https://github.com/TLINDEN/kage-viewer/issues). Thanks!
+[Please open an issue](https://github.com/TLINDEN/kageviewer/issues). Thanks!
 
 # License
 

config.go

@@ -32,10 +32,10 @@ import (
 )
 
 const (
-	VERSION string = "0.0.4"
+	VERSION string = "0.0.5"
-	Usage   string = `This is kage-viewer, a shader viewer.
+	Usage   string = `This is kageviewer, a shader viewer.
 
-Usage: kage-viewer [-vd] [-c <config file>] [-g geom] [-p geom] \
+Usage: kageviewer [-vd] [-c <config file>] [-g geom] [-p geom] \
        -i <image0.png> -i <image1.png> -s <shader.kage>
 
 Options:
@@ -47,9 +47,10 @@ Options:
 -b --background <png file>      Image to load as background
 -t --tps        <ticks/s>       At how many ticks per second to run
    --map-flag   <name>          Map Flag uniform to <name>
-   --map-ticks  <name>          Map Flag uniform to <name>
+   --map-ticks  <name>          Map Ticks uniform to <name>
-   --map-slider <name>          Map Flag uniform to <name>
+   --map-time   <name>          Map Time uniform to <name>
-   --map-mouse  <name>          Map Flag uniform to <name>
+   --map-slider <name>          Map Slider uniform to <name>
+   --map-mouse  <name>          Map Mouse uniform to <name>
 -d --debug                      Show debugging output
 -v --version                    Show program version
 `
@@ -69,6 +70,7 @@ type Config struct {
 	Ticks       string   `koanf:"map-ticks"`
 	Mouse       string   `koanf:"map-mouse"`
 	Slider      string   `koanf:"map-slider"`
+	Time        string   `koanf:"map-time"`
 
 	X, Y, Width, Height int // feed from -g + -p
 }
@@ -93,6 +95,7 @@ func InitConfig() (*Config, error) {
 	flagset.StringP("shader", "s", "", "shader file")
 	flagset.StringP("map-flag", "", "Flag", "map flag uniform")
 	flagset.StringP("map-ticks", "", "Ticks", "map ticks uniform")
+	flagset.StringP("map-time", "", "Time", "map time uniform")
 	flagset.StringP("map-mouse", "", "Mouse", "map mouse uniform")
 	flagset.StringP("map-slider", "", "Slider", "map slider uniform")
 	flagset.StringP("background", "b", "", "background image")
@@ -113,10 +116,10 @@ func InitConfig() (*Config, error) {
 		configfiles = []string{configfile}
 	} else {
 		configfiles = []string{
-			"/etc/kage-viewer.conf", "/usr/local/etc/kage-viewer.conf", // unix variants
+			"/etc/kageviewer.conf", "/usr/local/etc/kageviewer.conf", // unix variants
-			filepath.Join(home, ".config", "kage-viewer", "config"),
+			filepath.Join(home, ".config", "kageviewer", "config"),
-			filepath.Join(home, ".kage-viewer"),
+			filepath.Join(home, ".kageviewer"),
-			"kage-viewer.conf",
+			"kageviewer.conf",
 		}
 	}
 

game.go

@@ -33,8 +33,9 @@ type Game struct {
 	Conf         *Config
 	Images       []*asset.LiveAsset[*ebiten.Image]
 	Shader       *asset.LiveAsset[*ebiten.Shader]
+	ShaderBounds image.Rectangle
 	Cursor       []float64
-	Ticks      int
+	Ticks        float64
 	Slider       float64
 	Flag         int
 	Background   *asset.LiveAsset[*ebiten.Image]
@@ -56,6 +57,7 @@ func LoadImage(name string) (*ebiten.Image, error) {
 }
 
 func (game *Game) Init() error {
+	// preload images
 	for _, image := range game.Conf.Image {
 		slog.Debug("Loading images", "image", image)
 		//img, err := LoadImage(image)
@@ -67,6 +69,7 @@ func (game *Game) Init() error {
 		game.Images = append(game.Images, img)
 	}
 
+	// preload shader
 	shader, err := asset.NewLiveAsset[*ebiten.Shader](game.Conf.Shader)
 	if err != nil {
 		return fmt.Errorf("failed to load shader %s: %s", game.Conf.Shader, err)
@@ -85,8 +88,31 @@ func (game *Game) Init() error {
 
 	game.Shader = shader
 
+	// user can customize TPS
 	ebiten.SetMaxTPS(game.Conf.TPS)
 
+	// setup shader bounds, by default we use window size
+	game.ShaderBounds = image.Rect(0, 0, game.Conf.Width, game.Conf.Height)
+
+	if len(game.Images) > 0 {
+		if game.Conf.Width < game.Images[0].Value().Bounds().Max.X {
+			// setup  geom. Shader might  be smaller  than window, we  use the
+			// first image -  if any - to determine its  size. We also enlarge
+			// the window if the first image is larger than the window.
+			game.Conf.Width = game.Images[0].Value().Bounds().Max.X
+			game.Conf.Height = game.Images[0].Value().Bounds().Max.Y
+		}
+
+		// adjust shader size by first image as well
+		game.ShaderBounds = game.Images[0].Value().Bounds()
+	} else {
+		// there might be no shader image but a background image, check it
+		if game.Background != nil {
+			game.Conf.Width = game.Background.Value().Bounds().Max.X
+			game.Conf.Height = game.Background.Value().Bounds().Max.Y
+		}
+	}
+
 	return nil
 }
 
@@ -176,8 +202,9 @@ func (game *Game) Draw(screen *ebiten.Image) {
 	op.Uniforms = map[string]any{
 		game.Conf.Flag:   game.Flag,
 		game.Conf.Slider: game.Slider,
-		game.Conf.Ticks:  float64(game.Ticks) / 60,
+		game.Conf.Time:   game.Ticks / float64(ebiten.TPS()),
 		game.Conf.Mouse:  game.Cursor,
+		game.Conf.Ticks:  game.Ticks,
 	}
 
 	for idx, image := range game.Images {
@@ -186,7 +213,11 @@ func (game *Game) Draw(screen *ebiten.Image) {
 
 	op.GeoM.Translate(float64(game.Conf.X), float64(game.Conf.Y))
 
-	screen.DrawRectShader(game.Conf.Width, game.Conf.Height, game.Shader.Value(), op)
+	screen.DrawRectShader(
+		game.ShaderBounds.Dx(),
+		game.ShaderBounds.Dy(),
+		game.Shader.Value(),
+		op)
 }
 
 func (game *Game) Layout(outsideWidth, outsideHeight int) (int, int) {

go.mod

@@ -1,4 +1,4 @@
-module github.com/TLINDEN/kage-viewer
+module github.com/TLINDEN/kageviewer
 
 go 1.22
 

main.go

@@ -36,7 +36,7 @@ func main() {
 	}
 
 	if conf.Showversion {
-		fmt.Printf("This is kage-viewer version %s\n", VERSION)
+		fmt.Printf("This is kageviewer version %s\n", VERSION)
 		return
 	}
 

mkrel.sh

@@ -61,7 +61,7 @@ for D in $DIST; do
     GOOS=${os} GOARCH=${arch} go build -o ${binfile}
     mkdir -p ${tardir}
     cp ${binfile} README.md LICENSE ${tardir}/
-    echo 'tool = kage-viewer
+    echo 'tool = kageviewer
 PREFIX = /usr/local
 UID    = root
 GID    = 0