init: 自 zomaintain/backend/rdplib 平移独立成库; module path 从上游 github.com/nakagami/grdp 改为 git.zeroonesoft.cn/golib/rdplib

2026-09-19 18:55:43 +08:00
commit 1096fbce9d
94 changed files with 36790 additions and 0 deletions
@@ -0,0 +1,33 @@
+//go:build !amd64 && !arm64
+
+package grdp
+
+import "encoding/binary"
+
+// bgr32BatchToRGBA converts n BGRA32 pixels (4 bytes each: B,G,R,X) to RGBA.
+func bgr32BatchToRGBA(dst []byte, src []byte, n int) {
+	for i := range n {
+		s := i * 4
+		binary.LittleEndian.PutUint32(dst[s:],
+			uint32(src[s+2])|uint32(src[s+1])<<8|uint32(src[s])<<16|0xFF000000)
+	}
+}
+
+// rgb555BatchToRGBA converts n big-endian RGB555 pixels (src, 2 bytes each)
+// to RGBA (dst, 4 bytes each). n must be valid for the slice sizes.
+func rgb555BatchToRGBA(dst []byte, src []byte, n int) {
+	for i := range n {
+		d := binary.BigEndian.Uint16(src[i*2:])
+		binary.LittleEndian.PutUint32(dst[i*4:],
+			uint32((d&0x7C00)>>7)|uint32((d&0x03E0)>>2)<<8|uint32((d&0x001F)<<3)<<16|0xFF000000)
+	}
+}
+
+// rgb565BatchToRGBA converts n big-endian RGB565 pixels to RGBA.
+func rgb565BatchToRGBA(dst []byte, src []byte, n int) {
+	for i := range n {
+		d := binary.BigEndian.Uint16(src[i*2:])
+		binary.LittleEndian.PutUint32(dst[i*4:],
+			uint32((d&0xF800)>>8)|uint32((d&0x07E0)>>3)<<8|uint32((d&0x001F)<<3)<<16|0xFF000000)
+	}
+}