mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-28 12:48:54 +01:00
132 lines
2.9 KiB
Go
132 lines
2.9 KiB
Go
// Copyright 2024 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"image"
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_ "image/jpeg"
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"log"
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"github.com/hajimehoshi/ebiten/v2"
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)
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const (
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dstSize = 128
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screenWidth = dstSize * 2
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screenHeight = dstSize * 2
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)
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var (
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dsts = [4]*ebiten.Image{
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/*ebiten.NewImage(dstSize, dstSize),
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ebiten.NewImage(dstSize, dstSize),
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ebiten.NewImage(dstSize, dstSize),
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ebiten.NewImage(dstSize, dstSize),*/
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ebiten.NewImageWithOptions(image.Rect(0, 0, dstSize, dstSize), &ebiten.NewImageOptions{
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Unmanaged: true,
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}),
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ebiten.NewImageWithOptions(image.Rect(0, 0, dstSize, dstSize), &ebiten.NewImageOptions{
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Unmanaged: true,
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}),
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ebiten.NewImageWithOptions(image.Rect(0, 0, dstSize, dstSize), &ebiten.NewImageOptions{
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Unmanaged: true,
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}),
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ebiten.NewImageWithOptions(image.Rect(0, 0, dstSize, dstSize), &ebiten.NewImageOptions{
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Unmanaged: true,
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}),
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}
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shaderSrc = []byte(
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`
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//kage:units pixels
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package main
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func Fragment(dst vec4, src vec2, color vec4) (vec4, vec4, vec4, vec4) {
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return vec4(1,0,0,1), vec4(0,1,0,1), vec4(0,0,1,1), vec4(1,0,1,1)
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}
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`)
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s *ebiten.Shader
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)
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func init() {
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var err error
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s, err = ebiten.NewShader(shaderSrc)
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if err != nil {
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log.Fatal(err)
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}
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}
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type Game struct {
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count int
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}
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func (g *Game) Update() error {
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g.count++
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return nil
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}
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func (g *Game) Draw(screen *ebiten.Image) {
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vertices := []ebiten.Vertex{
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{
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DstX: 0,
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DstY: 0,
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},
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{
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DstX: dstSize,
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DstY: 0,
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},
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{
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DstX: 0,
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DstY: dstSize,
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},
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{
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DstX: dstSize,
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DstY: dstSize,
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},
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}
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indices := []uint16{0, 1, 2, 1, 2, 3}
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ebiten.DrawTrianglesShaderMRT(dsts, vertices, indices, s, nil)
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// Dst 0
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screen.DrawImage(dsts[0], nil)
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// Dst 1
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opts := &ebiten.DrawImageOptions{}
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opts.GeoM.Translate(dstSize, 0)
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screen.DrawImage(dsts[1], opts)
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// Dst 2
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opts.GeoM.Reset()
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opts.GeoM.Translate(0, dstSize)
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screen.DrawImage(dsts[2], opts)
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// Dst 3
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opts.GeoM.Reset()
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opts.GeoM.Translate(dstSize, dstSize)
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screen.DrawImage(dsts[3], opts)
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}
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func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
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return screenWidth, screenHeight
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}
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func main() {
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ebiten.SetWindowSize(screenWidth, screenHeight)
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ebiten.SetWindowTitle("MRT (Ebitengine Demo)")
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if err := ebiten.RunGameWithOptions(&Game{}, &ebiten.RunGameOptions{
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GraphicsLibrary: ebiten.GraphicsLibraryDirectX,
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}); err != nil {
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log.Fatal(err)
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}
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}
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