Merged in feature/support-more-types (pull request #219)

support new types for import * tests pass * missing file * bug fixes
2026-03-31 17:40:42 +00:00
parent 8e9889accc
commit b71a28d3c0
144 changed files with 28352 additions and 91 deletions
@@ -0,0 +1,104 @@
+// Copyright 2015 <chaishushan{AT}gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tiff
+
+import (
+	"image"
+	"io"
+)
+
+// DecodeConfig returns the color model and dimensions of a TIFF image without
+// decoding the entire image.
+func DecodeConfig(r io.Reader) (cfg image.Config, err error) {
+	var p *Reader
+	if p, err = OpenReader(r); err != nil {
+		return
+	}
+	defer p.Close()
+
+	return p.ImageConfig(0, 0)
+}
+
+func DecodeConfigAll(r io.Reader) (cfg [][]image.Config, errors [][]error, err error) {
+	var p *Reader
+	if p, err = OpenReader(r); err != nil {
+		return
+	}
+	defer p.Close()
+
+	cfg = make([][]image.Config, len(p.Ifd))
+	errors = make([][]error, len(p.Ifd))
+
+Loop:
+	for i := 0; i < len(p.Ifd); i++ {
+		errors[i] = make([]error, len(p.Ifd[i]))
+		for j := 0; j < len(p.Ifd[i]); j++ {
+			if cfg[i][j], errors[i][j] = p.Ifd[i][j].ImageConfig(); errors[i][j] != nil {
+				break Loop
+			}
+		}
+	}
+	for i := 0; i < len(errors); i++ {
+		for j := 0; j < len(errors[i]); j++ {
+			if errors[i][j] != nil {
+				err = errors[i][j]
+				return
+			}
+		}
+	}
+
+	return
+}
+
+// Decode reads a TIFF image from r and returns it as an image.Image.
+// The type of Image returned depends on the contents of the TIFF.
+func Decode(r io.Reader) (m image.Image, err error) {
+	var p *Reader
+	if p, err = OpenReader(r); err != nil {
+		return
+	}
+	defer p.Close()
+
+	m, err = p.DecodeImage(0, 0)
+	return
+}
+
+func DecodeAll(r io.Reader) (m [][]image.Image, errors [][]error, err error) {
+	var p *Reader
+	if p, err = OpenReader(r); err != nil {
+		return
+	}
+	defer p.Close()
+
+	m = make([][]image.Image, p.ImageNum())
+	errors = make([][]error, p.ImageNum())
+
+Loop:
+	for i := 0; i < p.ImageNum(); i++ {
+		m[i] = make([]image.Image, p.SubImageNum(i))
+		errors[i] = make([]error, len(p.Ifd[i]))
+		for j := 0; j < p.SubImageNum(i); j++ {
+			if m[i][j], errors[i][j] = p.DecodeImage(i, j); errors[i][j] != nil {
+				break Loop
+			}
+		}
+	}
+	for i := 0; i < len(errors); i++ {
+		for j := 0; j < len(errors[i]); j++ {
+			if errors[i][j] != nil {
+				err = errors[i][j]
+				return
+			}
+		}
+	}
+	return
+}
+
+func init() {
+	image.RegisterFormat("tiff", ClassicTiffLittleEnding, Decode, DecodeConfig)
+	image.RegisterFormat("tiff", ClassicTiffBigEnding, Decode, DecodeConfig)
+	image.RegisterFormat("tiff", BigTiffLittleEnding, Decode, DecodeConfig)
+	image.RegisterFormat("tiff", BigTiffBigEnding, Decode, DecodeConfig)
+}