66 lines
1.9 KiB
Go
66 lines
1.9 KiB
Go
package tools
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"rear/internal/utils"
|
|
)
|
|
|
|
// ImageInfo 图片信息
|
|
type ImageInfo struct {
|
|
Format string
|
|
Width int
|
|
Height int
|
|
ColorSpace string
|
|
FileSize string
|
|
}
|
|
|
|
// ConvertImage 使用 ImageMagick 转换图片
|
|
// 示例: ConvertImage(ctx, "input.jpg", "output.png", "-quality", "90")
|
|
func ConvertImage(ctx context.Context, input, output string, options ...string) error {
|
|
if err := utils.EnsureInitialized(); err != nil {
|
|
return err
|
|
}
|
|
|
|
args := append([]string{input}, options...)
|
|
args = append(args, output)
|
|
|
|
result, err := utils.ExecuteCommand(ctx, utils.ImageMagickPath, args...)
|
|
if err != nil {
|
|
return fmt.Errorf("convert failed: %w, stderr: %s", err, string(result.Stderr))
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ResizeImage 调整图片大小
|
|
func ResizeImage(ctx context.Context, input, output string, width, height int) error {
|
|
size := fmt.Sprintf("%dx%d", width, height)
|
|
return ConvertImage(ctx, input, output, "-resize", size)
|
|
}
|
|
|
|
// ResizeImageKeepAspect 按比例调整图片大小（保持宽高比）
|
|
func ResizeImageKeepAspect(ctx context.Context, input, output string, maxWidth, maxHeight int) error {
|
|
size := fmt.Sprintf("%dx%d>", maxWidth, maxHeight)
|
|
return ConvertImage(ctx, input, output, "-resize", size)
|
|
}
|
|
|
|
// CropImage 裁剪图片
|
|
func CropImage(ctx context.Context, input, output string, width, height, x, y int) error {
|
|
crop := fmt.Sprintf("%dx%d+%d+%d", width, height, x, y)
|
|
return ConvertImage(ctx, input, output, "-crop", crop)
|
|
}
|
|
|
|
// RotateImage 旋转图片
|
|
func RotateImage(ctx context.Context, input, output string, degrees float64) error {
|
|
return ConvertImage(ctx, input, output, "-rotate", fmt.Sprintf("%.2f", degrees))
|
|
}
|
|
|
|
// IsImageMagickAvailable 检查 ImageMagick 是否可用
|
|
func IsImageMagickAvailable() bool {
|
|
if err := utils.EnsureInitialized(); err != nil {
|
|
return false
|
|
}
|
|
return utils.ImageMagickPath != ""
|
|
}
|