updated ebiten version from 2.7.9 to 2.9.9

vendor/github.com/hajimehoshi/ebiten/v2/internal/shaderir/program.go

@@ -16,8 +16,11 @@
 package shaderir
 
 import (
+	"bytes"
+	"encoding/hex"
 	"go/constant"
 	"go/token"
+	"hash/fnv"
 	"sort"
 	"strings"
 )
@@ -29,6 +32,21 @@ const (
 	Pixels
 )
 
+type SourceHash [16]byte
+
+func CalcSourceHash(source []byte) SourceHash {
+	h := fnv.New128a()
+	_, _ = h.Write(bytes.TrimSpace(source))
+
+	var hash SourceHash
+	h.Sum(hash[:0])
+	return hash
+}
+
+func (s SourceHash) String() string {
+	return hex.EncodeToString(s[:])
+}
+
 type Program struct {
 	UniformNames []string
 	Uniforms     []Type
@@ -40,6 +58,8 @@ type Program struct {
 	FragmentFunc FragmentFunc
 	Unit         Unit
 
+	SourceHash SourceHash
+
 	uniformFactors []uint32
 }
 
@@ -274,6 +294,7 @@ const (
 	Fwidth      BuiltinFunc = "fwidth"
 	DiscardF    BuiltinFunc = "discard"
 	TexelAt     BuiltinFunc = "__texelAt"
+	FrontFacing BuiltinFunc = "frontfacing"
 )
 
 func ParseBuiltinFunc(str string) (BuiltinFunc, bool) {
@@ -331,7 +352,8 @@ func ParseBuiltinFunc(str string) (BuiltinFunc, bool) {
 		Dfdy,
 		Fwidth,
 		DiscardF,
-		TexelAt:
+		TexelAt,
+		FrontFacing:
 		return BuiltinFunc(str), true
 	}
 	return "", false
@@ -351,21 +373,21 @@ func IsValidSwizzling(s string) bool {
 	switch {
 	case strings.IndexByte(xyzw, s[0]) >= 0:
 		for _, c := range s {
-			if strings.IndexRune(xyzw, c) == -1 {
+			if !strings.ContainsRune(xyzw, c) {
 				return false
 			}
 		}
 		return true
 	case strings.IndexByte(rgba, s[0]) >= 0:
 		for _, c := range s {
-			if strings.IndexRune(rgba, c) == -1 {
+			if !strings.ContainsRune(rgba, c) {
 				return false
 			}
 		}
 		return true
 	case strings.IndexByte(strq, s[0]) >= 0:
 		for _, c := range s {
-			if strings.IndexRune(strq, c) == -1 {
+			if !strings.ContainsRune(strq, c) {
 				return false
 			}
 		}
@@ -474,7 +496,7 @@ func (p *Program) FilterUniformVariables(uniforms []uint32) {
 		p.uniformFactors = make([]uint32, len(uniforms))
 		var idx int
 		for i, typ := range p.Uniforms {
-			c := typ.Uint32Count()
+			c := typ.DwordCount()
 			if reachableUniforms[i] {
 				for i := idx; i < idx+c; i++ {
 					p.uniformFactors[i] = 1