64 lines
1.2 KiB
Odin
64 lines
1.2 KiB
Odin
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package showimage
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import "core:os"
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import s "core:strings"
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import rl "vendor:raylib"
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path: string
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tex: ^rl.Texture
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zoom: f32 = 1
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offset: [2]f32
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main :: proc() {
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config: rl.ConfigFlags = { .WINDOW_RESIZABLE }
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rl.InitWindow(800, 600, "showimage")
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rl.SetWindowState(config)
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if len(os.args) > 1 {
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path = os.args[1]
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t := rl.LoadTexture(s.clone_to_cstring(path))
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tex = &t
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reset_zoom()
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}
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for !rl.WindowShouldClose() {
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scroll := rl.GetMouseWheelMove()
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if scroll > 0 {
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zoom *= 2
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} else if scroll < 0 {
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zoom /= 2
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}
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if rl.IsMouseButtonDown(rl.MouseButton.LEFT) {
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offset += rl.GetMouseDelta()
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}
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if rl.IsMouseButtonPressed(rl.MouseButton.RIGHT) {
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offset = 0
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reset_zoom()
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}
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rl.BeginDrawing()
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rl.ClearBackground({50, 50, 50, 255})
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if tex != nil {
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rl.DrawTextureEx(tex^, offset, 0, zoom, rl.WHITE)
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}
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rl.EndDrawing()
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}
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rl.CloseWindow()
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}
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reset_zoom :: proc() {
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screen_width := rl.GetRenderWidth()
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fit_x: i32 = 1
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for fit_x * tex.width < screen_width {
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fit_x *= 2
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}
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fit_x /= 2
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screen_height := rl.GetRenderHeight()
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fit_y: i32 = 1
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for fit_y * tex.height < screen_height {
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fit_y *= 2
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}
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fit_y /= 2
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zoom = f32(min(fit_x, fit_y))
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}
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