diff --git a/examples/fill/main.go b/examples/fill/main.go new file mode 100644 index 000000000..f4258011a --- /dev/null +++ b/examples/fill/main.go @@ -0,0 +1,94 @@ +// Copyright 2018 The Ebiten Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build example + +package main + +import ( + "image/color" + _ "image/png" + "log" + + "github.com/hajimehoshi/ebiten" + "github.com/hajimehoshi/ebiten/ebitenutil" +) + +const ( + screenWidth = 320 + screenHeight = 240 +) + +var ( + ebitenImage *ebiten.Image + colors = []color.RGBA{ + {0xff, 0xff, 0xff, 0xff}, + {0xff, 0xff, 0x0, 0xff}, + {0xff, 0x0, 0xff, 0xff}, + {0xff, 0x0, 0x0, 0xff}, + {0x0, 0xff, 0xff, 0xff}, + {0x0, 0xff, 0x0, 0xff}, + {0x0, 0x0, 0xff, 0xff}, + {0x0, 0x0, 0x0, 0xff}, + } +) + +func update(screen *ebiten.Image) error { + if ebiten.IsRunningSlowly() { + return nil + } + + const ( + ox = 10 + oy = 10 + dx = 60 + dy = 50 + ) + screen.Fill(color.NRGBA{0x00, 0x40, 0x80, 0xff}) + + op := &ebiten.DrawImageOptions{} + op.GeoM.Translate(ox, oy) + screen.DrawImage(ebitenImage, op) + + // Fill with solid colors + for i, c := range colors { + op := &ebiten.DrawImageOptions{} + x := i % 4 + y := i/4 + 1 + op.GeoM.Translate(ox+float64(dx*x), oy+float64(dy*y)) + + // Set RGB (not Alpha) 1 forcibly + op.ColorM.Scale(0, 0, 0, 1) + op.ColorM.Translate(1, 1, 1, 0) + + // Set color by scaling + r := float64(c.R) / 0xff + g := float64(c.G) / 0xff + b := float64(c.B) / 0xff + op.ColorM.Scale(r, g, b, 1) + screen.DrawImage(ebitenImage, op) + } + return nil +} + +func main() { + var err error + ebitenImage, _, err = ebitenutil.NewImageFromFile(ebitenutil.JoinStringsIntoFilePath("_resources", "images", "ebiten.png"), ebiten.FilterNearest) + if err != nil { + log.Fatal(err) + } + if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Fill with solid colors (Ebiten Demo)"); err != nil { + log.Fatal(err) + } +}