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internal/graphicsdriver/opengl: introduce EBITENGINE_OPENGL replacing ebitenginewebgl1

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This change inroduces a new environment variable `EBITENGINE_OPENGL`
to replace the build tag `ebitenginewebgl1`.
This commit is contained in:
Hajime Hoshi 2022-08-28 01:45:55 +09:00
parent 001c344d00
commit ec68534c73
5 changed files with 19 additions and 47 deletions
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2
.github/workflows/test.yml vendored
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@ -129,7 +129,7 @@ jobs:
if: ${{ !startsWith(matrix.os, 'windows-') && !startsWith(matrix.go, '1.15.') && !startsWith(matrix.go, '1.16.') }}
run: |
env GOOS=js GOARCH=wasm go test -tags=example ${{ !startsWith(matrix.go, '1.15.') && !startsWith(matrix.go, '1.16.') && '-shuffle=on' || '' }} -v ./...
env GOOS=js GOARCH=wasm go test -tags=example,ebitenginewebgl1 ${{ !startsWith(matrix.go, '1.15.') && !startsWith(matrix.go, '1.16.') && '-shuffle=on' || '' }} -v ./...
env GOOS=js GOARCH=wasm EBITENGINE_OPENGL=webgl1 go test -tags=example ${{ !startsWith(matrix.go, '1.15.') && !startsWith(matrix.go, '1.16.') && '-shuffle=on' || '' }} -v ./...
- name: Install ebitenmobile
run: |

7
doc.go
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@ -81,13 +81,16 @@
// "warp": Use WARP (i.e. software rendering).
// "debug": Use a debug layer.
//
// `EBITENGINE_OPENGL` environment variable specifies various parameters for OpenGL.
// You can specify multiple values separated by a comma. The default value is empty (i.e. no parameters).
//
// "webgl1": Use WebGL 1. This is valid only on browsers.
//
// # Build tags
//
// `ebitenginedebug` outputs a log of graphics commands. This is useful to know what happens in Ebitengine. In general, the
// number of graphics commands affects the performance of your game.
//
// `ebitenginewebgl1` forces to use WebGL 1 on browsers.
//
// `ebitenginesinglethread` disables Ebitengine's thread safety to unlock maximum performance. If you use this you will have
// to manage threads yourself. Functions like IsKeyPressed will no longer be concurrent-safe with this build tag.
// They must be called from the main thread or the same goroutine as the given game's callback functions like Update

17
internal/graphicsdriver/opengl/context_js.go
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@ -17,6 +17,8 @@ package opengl
import (
"errors"
"fmt"
"os"
"strings"
"syscall/js"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
@ -95,9 +97,16 @@ const (
webGLVersion2
)
var (
webGL2MightBeAvailable = !forceWebGL1 && (js.Global().Get("WebGL2RenderingContext").Truthy())
)
func webGL2MightBeAvailable() bool {
env := os.Getenv("EBITENGINE_OPENGL")
for _, t := range strings.Split(env, ",") {
switch strings.TrimSpace(t) {
case "webgl1":
return false
}
}
return js.Global().Get("WebGL2RenderingContext").Truthy()
}
func uint8ArrayToSlice(value js.Value, length int) []byte {
if l := value.Get("byteLength").Int(); length > l {
@ -131,7 +140,7 @@ func (c *context) initGL() error {
attr.Set("premultipliedAlpha", true)
attr.Set("stencil", true)
if webGL2MightBeAvailable {
if webGL2MightBeAvailable() {
gl = canvas.Call("getContext", "webgl2", attr)
if gl.Truthy() {
c.webGLVersion = webGLVersion2

20
internal/graphicsdriver/opengl/context_notwebgl1.go
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@ -1,20 +0,0 @@
// Copyright 2020 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.
//go:build !ebitenginewebgl1 && !ebitenwebgl1
// +build !ebitenginewebgl1,!ebitenwebgl1
package opengl
const forceWebGL1 = false

20
internal/graphicsdriver/opengl/context_webgl1.go
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@ -1,20 +0,0 @@
// Copyright 2020 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.
//go:build ebitenginewebgl1 || ebitenwebgl1
// +build ebitenginewebgl1 ebitenwebgl1
package opengl
const forceWebGL1 = true