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internal/graphicsdriver/directx: integrate EBITENGINE_DIRECTX and EBITENGINE_DIRECTX_FEATURE_LEVEL

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This commit is contained in:
Hajime Hoshi 2023-03-29 16:22:20 +09:00
parent 129956d8f0
commit 0449126c5b
2 changed files with 57 additions and 34 deletions
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20
doc.go
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@ -78,17 +78,19 @@
// `EBITENGINE_DIRECTX` environment variable specifies various parameters for DirectX.
// You can specify multiple values separated by a comma. The default value is empty (i.e. no parameters).
//
// "debug": Use a debug layer.
// "warp": Use WARP (i.e. software rendering).
// "version=11": Use DirectX 11 (default).
// "version=12": Use DirectX 12.
// "debug": Use a debug layer.
// "warp": Use WARP (i.e. software rendering).
// "version=VERSION": Specify a DirectX version (e.g. 11).
// "featurelevel=FEATURE_LEVEL": Specify a feature level (e.g. 11_0). This is for DirectX 12.
//
// The options "version=..." are exclusive and if multiples are specified, the lastly specified value is adopted.
// On Xbox, the version options are ignored and DirectX 12 is always adopted.
// The options taking arguments are exclusive, and if multiples are specified, the lastly specified value is adopted.
//
// `EBITENGINE_DIRECTX_FEATURE_LEVEL` environment variable specifies DirectX feature level.
// The possible values are "11_0", "11_1", "12_0", "12_1", and "12_2".
// The default value is "11_0".
// The possible values for the option "version" are "11" and "12".
// If the version is not specified, the default version 11 is adopted.
// On Xbox, the "version" option is ignored and DirectX 12 is always adopted.
//
// The option "featurelevel" is valid only for DirectX 12.
// The possible values are "11_0", "11_1", "12_0", "12_1", and "12_2". The default value is "11_0".
//
// `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).

71
internal/graphicsdriver/directx/graphics_windows.go
View File

@ -20,6 +20,7 @@ import (
"math"
"os"
"runtime"
"strconv"
"strings"
"time"
"unsafe"
@ -52,6 +53,23 @@ func pow2(x uint32) uint32 {
return p2
}
func parseFeatureLevel(str string) (_D3D_FEATURE_LEVEL, bool) {
switch str {
case "11_0":
return _D3D_FEATURE_LEVEL_11_0, true
case "11_1":
return _D3D_FEATURE_LEVEL_11_1, true
case "12_0":
return _D3D_FEATURE_LEVEL_12_0, true
case "12_1":
return _D3D_FEATURE_LEVEL_12_1, true
case "12_2":
return _D3D_FEATURE_LEVEL_12_2, true
default:
return 0, false
}
}
// NewGraphics creates an implementation of graphicsdriver.Graphics for DirectX.
// The returned graphics value is nil iff the error is not nil.
func NewGraphics() (graphicsdriver.Graphics, error) {
@ -59,22 +77,43 @@ func NewGraphics() (graphicsdriver.Graphics, error) {
var useDebugLayer bool
version := 11
// Specify the feature level 11 by default.
// Some old cards don't work well with the default feature level (#2447, #2486).
featureLevel := _D3D_FEATURE_LEVEL_11_0
// Parse a special environment variable for backward compatibility.
if env := os.Getenv("EBITENGINE_DIRECTX_FEATURE_LEVEL"); env != "" {
if fl, ok := parseFeatureLevel(env); ok {
featureLevel = fl
}
}
env := os.Getenv("EBITENGINE_DIRECTX")
if env == "" {
// For backward compatibility, read the EBITEN_ version.
env = os.Getenv("EBITEN_DIRECTX")
}
for _, t := range strings.Split(env, ",") {
switch strings.TrimSpace(t) {
case "warp":
t := strings.TrimSpace(t)
switch {
case t == "warp":
// TODO: Is WARP available on Xbox?
useWARP = true
case "debug":
case t == "debug":
useDebugLayer = true
case "version=11":
version = 11
case "version=12":
version = 12
case strings.HasPrefix(t, "version="):
v, err := strconv.Atoi(t[len("version="):])
if err != nil {
continue
}
version = v
case strings.HasPrefix(t, "featurelevel="):
fl, ok := parseFeatureLevel(t[len("featurelevel="):])
if !ok {
continue
}
featureLevel = fl
}
}
@ -91,24 +130,6 @@ func NewGraphics() (graphicsdriver.Graphics, error) {
}
return g, nil
case 12:
// Specify the feature level 11 by default.
// Some old cards don't work well with the default feature level (#2447, #2486).
var featureLevel _D3D_FEATURE_LEVEL = _D3D_FEATURE_LEVEL_11_0
if env := os.Getenv("EBITENGINE_DIRECTX_FEATURE_LEVEL"); env != "" {
switch env {
case "11_0":
featureLevel = _D3D_FEATURE_LEVEL_11_0
case "11_1":
featureLevel = _D3D_FEATURE_LEVEL_11_1
case "12_0":
featureLevel = _D3D_FEATURE_LEVEL_12_0
case "12_1":
featureLevel = _D3D_FEATURE_LEVEL_12_1
case "12_2":
featureLevel = _D3D_FEATURE_LEVEL_12_2
}
}
g, err := newGraphics12(useWARP, useDebugLayer, featureLevel)
if err != nil {
return nil, err