59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package main
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import (
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"fmt"
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"os"
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"github.com/veandco/go-sdl2/gfx"
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"github.com/veandco/go-sdl2/sdl"
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)
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var winTitle string = "SDL2 GFX"
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var winWidth, winHeight int32 = 800, 600
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func run() int {
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var window *sdl.Window
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var renderer *sdl.Renderer
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var vx, vy = make([]int16, 3), make([]int16, 3)
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var err error
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if err = sdl.Init(sdl.INIT_EVERYTHING); err != nil {
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fmt.Fprintf(os.Stderr, "Failed to initialize SDL: %s\n", err)
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return 1
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}
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defer sdl.Quit()
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if window, err = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, winWidth, winHeight, sdl.WINDOW_SHOWN); err != nil {
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fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
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return 2
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}
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defer window.Destroy()
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if renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED); err != nil {
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fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err)
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return 3 // don't use os.Exit(3); otherwise, previous deferred calls will never run
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}
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renderer.Clear()
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defer renderer.Destroy()
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vx[0] = int16(winWidth / 3)
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vy[0] = int16(winHeight / 3)
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vx[1] = int16(winWidth * 2 / 3)
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vy[1] = int16(winHeight / 3)
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vx[2] = int16(winWidth / 2)
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vy[2] = int16(winHeight * 2 / 3)
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gfx.FilledPolygonColor(renderer, vx, vy, sdl.Color{0, 0, 255, 255})
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gfx.CharacterColor(renderer, winWidth-16, 16, 'X', sdl.Color{255, 0, 0, 255})
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gfx.StringColor(renderer, 16, 16, "GFX Demo", sdl.Color{0, 255, 0, 255})
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renderer.Present()
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sdl.Delay(3000)
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return 0
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}
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func main() {
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os.Exit(run())
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}
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