Adding modding folder with a hacked build.

2026-09-26 08:53:08 +02:00
parent cdb960dc71
commit c91080aba7
755 changed files with 50424 additions and 0 deletions
@@ -0,0 +1,98 @@
+package bitmap
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/inkyblackness/hacked/ss1"
+	"github.com/inkyblackness/hacked/ss1/resource"
+	"github.com/inkyblackness/hacked/ss1/serial"
+)
+
+const (
+	animationEndTag     = 0x0C
+	animationEndTagData = 0x01
+
+	animationEntryTag = 0x04
+
+	errEndTagDataWrong ss1.StringError = "end tag data wrong"
+)
+
+type unknownEntryTagError struct {
+	tag byte
+}
+
+func (err unknownEntryTagError) Error() string {
+	return fmt.Sprintf("unknown entry tag 0x%02X", int(err.tag))
+}
+
+// Animation describes a sequence of bitmaps to form a small movie.
+type Animation struct {
+	Width      int16
+	Height     int16
+	ResourceID resource.ID
+	IntroFlag  uint16
+	Entries    []AnimationEntry
+}
+
+// AnimationEntry describes one part of an animation with common frame time.
+type AnimationEntry struct {
+	FirstFrame byte
+	LastFrame  byte
+	FrameTime  int16
+}
+
+// ReadAnimation extracts an animation from a serialized stream.
+func ReadAnimation(reader io.Reader) (anim Animation, err error) {
+	decoder := serial.NewDecoder(reader)
+	codeAnimationBase(decoder, &anim)
+	done := false
+	err = decoder.FirstError()
+	for !done && (err == nil) {
+		var tag byte
+		decoder.Code(&tag)
+		err = decoder.FirstError()
+		switch tag {
+		case animationEntryTag:
+			var entry AnimationEntry
+			decoder.Code(&entry)
+			anim.Entries = append(anim.Entries, entry)
+			err = decoder.FirstError()
+		case animationEndTag:
+			var endTagData byte
+			decoder.Code(&endTagData)
+			if endTagData != animationEndTagData {
+				err = errEndTagDataWrong
+			}
+			done = true
+		default:
+			if err == nil {
+				err = unknownEntryTagError{tag: tag}
+			}
+		}
+	}
+
+	return
+}
+
+// WriteAnimation serializes an animation to a writer.
+func WriteAnimation(writer io.Writer, anim Animation) error {
+	encoder := serial.NewEncoder(writer)
+	codeAnimationBase(encoder, &anim)
+	for _, entry := range anim.Entries {
+		encoder.Code([]byte{animationEntryTag})
+		encoder.Code(&entry) // nolint: scopelint
+	}
+	encoder.Code([]byte{animationEndTag, animationEndTagData})
+
+	return encoder.FirstError()
+}
+
+func codeAnimationBase(coder serial.Coder, anim *Animation) {
+	coder.Code(&anim.Width)
+	coder.Code(&anim.Height)
+	coder.Code(&anim.ResourceID)
+	var unknown [6]byte
+	coder.Code(&unknown)
+	coder.Code(&anim.IntroFlag)
+}