context_x.go (1217B)
1 // Copyright 2020 The Ebiten Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 //go:build (freebsd || linux) && !android 16 // +build freebsd linux 17 // +build !android 18 19 package opengl 20 21 import ( 22 "strings" 23 "sync" 24 25 "github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl/gl" 26 ) 27 28 var ( 29 pboAvailable = true 30 pboAvailableOnce sync.Once 31 ) 32 33 func isPBOAvailable() bool { 34 pboAvailableOnce.Do(func() { 35 // This must be called after GL context is created. 36 str := gl.RendererDeviceString() 37 tokens := strings.Split(str, " ") 38 if len(tokens) == 0 { 39 return 40 } 41 // Raspbery Pi 4 has an issue around PBO (#1208). 42 if tokens[0] == "V3D" { 43 pboAvailable = false 44 } 45 }) 46 return pboAvailable 47 }