Make code for loading images with ImageMagick re-useable
This commit is contained in:
Kovid Goyal
parent
404a775f4b
commit
be886f9bf9
@ -3,372 +3,31 @@
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package icat
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"image"
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"image/gif"
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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"strings"
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"kitty/tools/tui/graphics"
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"kitty/tools/utils"
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"kitty/tools/utils/images"
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"kitty/tools/utils/shm"
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)
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var _ = fmt.Print
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var MagickExe = (&utils.Once[string]{Run: func() string {
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ans := utils.Which("magick")
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if ans == "" {
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ans = utils.Which("magick", "/usr/local/bin", "/opt/bin", "/opt/homebrew/bin", "/usr/bin", "/bin", "/usr/sbin", "/sbin")
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}
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return ans
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}}).Get
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func run_magick(path string, cmd []string) ([]byte, error) {
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c := exec.Command(cmd[0], cmd[1:]...)
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output, err := c.Output()
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if err != nil {
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var exit_err *exec.ExitError
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if errors.As(err, &exit_err) {
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return nil, fmt.Errorf("Running the command: %s\nFailed with error:\n%s", strings.Join(cmd, " "), string(exit_err.Stderr))
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}
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return nil, fmt.Errorf("Could not find the program: %#v. Is ImageMagick installed and in your PATH?", cmd[0])
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}
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return output, nil
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}
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type IdentifyOutput struct {
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Fmt, Canvas, Transparency, Gap, Index, Size, Dpi, Dispose, Orientation string
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}
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type IdentifyRecord struct {
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FmtUppercase string
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Gap int
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Canvas struct{ Width, Height, Left, Top int }
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Width, Height int
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Dpi struct{ X, Y float64 }
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Index int
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Mode graphics.GRT_f
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NeedsBlend bool
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Disposal int
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DimensionsSwapped bool
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}
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func parse_identify_record(ans *IdentifyRecord, raw *IdentifyOutput) (err error) {
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ans.FmtUppercase = strings.ToUpper(raw.Fmt)
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if raw.Gap != "" {
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ans.Gap, err = strconv.Atoi(raw.Gap)
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if err != nil {
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return fmt.Errorf("Invalid gap value in identify output: %s", raw.Gap)
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}
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ans.Gap = utils.Max(0, ans.Gap)
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}
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area, pos, found := strings.Cut(raw.Canvas, "+")
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ok := false
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if found {
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w, h, found := strings.Cut(area, "x")
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if found {
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ans.Canvas.Width, err = strconv.Atoi(w)
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func Render(path string, ro *images.RenderOptions, frames []images.IdentifyRecord) (ans []*image_frame, err error) {
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ro.TempfilenameTemplate = shm_template
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image_frames, filenames, err := images.RenderWithMagick(path, ro, frames)
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if err == nil {
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ans.Canvas.Height, err = strconv.Atoi(h)
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if err == nil {
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x, y, found := strings.Cut(pos, "+")
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if found {
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ans.Canvas.Left, err = strconv.Atoi(x)
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if err == nil {
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ans.Canvas.Top, err = strconv.Atoi(y)
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ok = true
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ans = make([]*image_frame, len(image_frames))
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for i, x := range image_frames {
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ans[i] = &image_frame{
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filename: filenames[x.Number], filename_is_temporary: true,
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number: x.Number, width: x.Width, height: x.Height, left: x.Left, top: x.Top,
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transmission_format: graphics.GRT_format_rgba, delay_ms: int(x.Delay_ms), compose_onto: x.Compose_onto,
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}
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if x.Is_opaque {
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ans[i].transmission_format = graphics.GRT_format_rgb
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}
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}
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}
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}
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}
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if !ok {
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return fmt.Errorf("Invalid canvas value in identify output: %s", raw.Canvas)
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}
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w, h, found := strings.Cut(raw.Size, "x")
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ok = false
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if found {
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ans.Width, err = strconv.Atoi(w)
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if err == nil {
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ans.Height, err = strconv.Atoi(h)
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ok = true
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}
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}
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if !ok {
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return fmt.Errorf("Invalid size value in identify output: %s", raw.Size)
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}
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x, y, found := strings.Cut(raw.Dpi, "x")
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ok = false
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if found {
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ans.Dpi.X, err = strconv.ParseFloat(x, 64)
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if err == nil {
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ans.Dpi.Y, err = strconv.ParseFloat(y, 64)
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ok = true
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}
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}
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if !ok {
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return fmt.Errorf("Invalid dpi value in identify output: %s", raw.Dpi)
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}
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ans.Index, err = strconv.Atoi(raw.Index)
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if err != nil {
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return fmt.Errorf("Invalid index value in identify output: %s", raw.Index)
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}
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q := strings.ToLower(raw.Transparency)
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if q == "blend" || q == "true" {
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ans.Mode = graphics.GRT_format_rgba
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} else {
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ans.Mode = graphics.GRT_format_rgb
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}
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ans.NeedsBlend = q == "blend"
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switch strings.ToLower(raw.Dispose) {
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case "undefined":
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ans.Disposal = 0
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case "none":
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ans.Disposal = gif.DisposalNone
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case "background":
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ans.Disposal = gif.DisposalBackground
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case "previous":
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ans.Disposal = gif.DisposalPrevious
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default:
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return fmt.Errorf("Invalid value for dispose: %s", raw.Dispose)
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}
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switch raw.Orientation {
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case "5", "6", "7", "8":
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ans.DimensionsSwapped = true
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}
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if ans.DimensionsSwapped {
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ans.Canvas.Width, ans.Canvas.Height = ans.Canvas.Height, ans.Canvas.Width
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ans.Width, ans.Height = ans.Height, ans.Width
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}
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return
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}
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func Identify(path string) (ans []IdentifyRecord, err error) {
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cmd := []string{"identify"}
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if MagickExe() != "" {
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cmd = []string{MagickExe(), cmd[0]}
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}
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q := `{"fmt":"%m","canvas":"%g","transparency":"%A","gap":"%T","index":"%p","size":"%wx%h",` +
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`"dpi":"%xx%y","dispose":"%D","orientation":"%[EXIF:Orientation]"},`
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cmd = append(cmd, "-format", q, "--", path)
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output, err := run_magick(path, cmd)
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if err != nil {
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return nil, err
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}
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output = bytes.TrimRight(bytes.TrimSpace(output), ",")
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raw_json := make([]byte, 0, len(output)+2)
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raw_json = append(raw_json, '[')
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raw_json = append(raw_json, output...)
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raw_json = append(raw_json, ']')
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var records []IdentifyOutput
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err = json.Unmarshal(raw_json, &records)
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if err != nil {
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return nil, fmt.Errorf("The ImageMagick identify program returned malformed output, with error: %w", err)
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}
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ans = make([]IdentifyRecord, len(records))
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for i, rec := range records {
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err = parse_identify_record(&ans[i], &rec)
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if err != nil {
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return nil, err
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}
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}
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return ans, nil
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}
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type RenderOptions struct {
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RemoveAlpha *images.NRGBColor
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Flip, Flop bool
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ResizeTo image.Point
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OnlyFirstFrame bool
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}
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func make_temp_dir() (ans string, err error) {
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if shm.SHM_DIR != "" {
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ans, err = os.MkdirTemp(shm.SHM_DIR, shm_template)
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if err == nil {
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return
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}
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}
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return os.MkdirTemp("", shm_template)
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}
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func check_resize(frame *image_frame) error {
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// ImageMagick sometimes generates RGBA images smaller than the specified
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// size. See https://github.com/kovidgoyal/kitty/issues/276 for examples
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s, err := os.Stat(frame.filename)
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if err != nil {
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return err
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}
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sz := int(s.Size())
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bytes_per_pixel := 4
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if frame.transmission_format == graphics.GRT_format_rgb {
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bytes_per_pixel = 3
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}
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expected_size := bytes_per_pixel * frame.width * frame.height
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if sz < expected_size {
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missing := expected_size - sz
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if missing%(bytes_per_pixel*frame.width) != 0 {
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return fmt.Errorf("ImageMagick failed to resize correctly. It generated %d < %d of data (w=%d h=%d bpp=%d)", sz, expected_size, frame.width, frame.height, bytes_per_pixel)
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}
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frame.height -= missing / (bytes_per_pixel * frame.width)
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}
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return nil
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}
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func Render(path string, ro *RenderOptions, frames []IdentifyRecord) (ans []*image_frame, err error) {
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cmd := []string{"convert"}
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if MagickExe() != "" {
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cmd = []string{MagickExe(), cmd[0]}
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}
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ans = make([]*image_frame, 0, len(frames))
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defer func() {
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if err != nil && ans != nil {
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for _, frame := range ans {
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if frame.filename_is_temporary {
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os.Remove(frame.filename)
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}
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}
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ans = nil
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}
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}()
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if ro.RemoveAlpha != nil {
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cmd = append(cmd, "-background", ro.RemoveAlpha.AsSharp(), "-alpha", "remove")
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} else {
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cmd = append(cmd, "-background", "none")
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}
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if ro.Flip {
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cmd = append(cmd, "-flip")
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}
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if ro.Flop {
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cmd = append(cmd, "-flop")
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}
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cpath := path
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if ro.OnlyFirstFrame {
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cpath += "[0]"
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}
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has_multiple_frames := len(frames) > 1
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get_multiple_frames := has_multiple_frames && !ro.OnlyFirstFrame
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cmd = append(cmd, "--", cpath, "-auto-orient")
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if ro.ResizeTo.X > 0 {
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rcmd := []string{"-resize", fmt.Sprintf("%dx%d!", ro.ResizeTo.X, ro.ResizeTo.Y)}
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if get_multiple_frames {
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cmd = append(cmd, "-coalesce")
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cmd = append(cmd, rcmd...)
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cmd = append(cmd, "-deconstruct")
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} else {
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cmd = append(cmd, rcmd...)
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}
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}
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cmd = append(cmd, "-depth", "8", "-set", "filename:f", "%w-%h-%g-%p")
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if get_multiple_frames {
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cmd = append(cmd, "+adjoin")
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}
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tdir, err := make_temp_dir()
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if err != nil {
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err = fmt.Errorf("Failed to create temporary directory to hold ImageMagick output with error: %w", err)
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return
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}
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defer os.RemoveAll(tdir)
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mode := "rgba"
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if frames[0].Mode == graphics.GRT_format_rgb {
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mode = "rgb"
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}
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cmd = append(cmd, filepath.Join(tdir, "im-%[filename:f]."+mode))
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_, err = run_magick(path, cmd)
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if err != nil {
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return
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}
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entries, err := os.ReadDir(tdir)
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if err != nil {
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err = fmt.Errorf("Failed to read temp dir used to store ImageMagick output with error: %w", err)
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return
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}
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base_dir := filepath.Dir(tdir)
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gaps := make([]int, len(frames))
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for i, frame := range frames {
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gaps[i] = frame.Gap
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}
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min_gap := calc_min_gap(gaps)
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for _, entry := range entries {
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fname := entry.Name()
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p, _, _ := strings.Cut(fname, ".")
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parts := strings.Split(p, "-")
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if len(parts) < 5 {
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continue
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}
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index, cerr := strconv.Atoi(parts[len(parts)-1])
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if cerr != nil || index < 0 || index >= len(frames) {
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continue
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}
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width, cerr := strconv.Atoi(parts[1])
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if cerr != nil {
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continue
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}
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height, cerr := strconv.Atoi(parts[2])
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if cerr != nil {
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continue
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}
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_, pos, found := strings.Cut(parts[3], "+")
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if !found {
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continue
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}
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px, py, found := strings.Cut(pos, "+")
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if !found {
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continue
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}
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x, cerr := strconv.Atoi(px)
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if cerr != nil {
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continue
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}
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y, cerr := strconv.Atoi(py)
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if cerr != nil {
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continue
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}
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identify_data := frames[index]
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df, cerr := os.CreateTemp(base_dir, graphics.TempTemplate+"."+mode)
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if cerr != nil {
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err = fmt.Errorf("Failed to create a temporary file in %s with error: %w", base_dir, cerr)
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return
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}
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err = os.Rename(filepath.Join(tdir, fname), df.Name())
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if err != nil {
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err = fmt.Errorf("Failed to rename a temporary file in %s with error: %w", tdir, err)
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return
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}
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df.Close()
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frame := image_frame{
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number: index + 1, width: width, height: height, left: x, top: y,
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transmission_format: identify_data.Mode, filename_is_temporary: true,
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filename: df.Name(),
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}
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frame.set_delay(identify_data.Gap, min_gap)
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err = check_resize(&frame)
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if err != nil {
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return
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}
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ans = append(ans, &frame)
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}
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if len(ans) < len(frames) {
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err = fmt.Errorf("Failed to render %d out of %d frames", len(frames)-len(ans), len(frames))
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return
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}
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ans = utils.Sort(ans, func(a, b *image_frame) bool { return a.number < b.number })
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anchor_frame := 1
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for i, frame := range ans {
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anchor_frame = frame.set_disposal(anchor_frame, byte(frames[i].Disposal))
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}
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return
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return ans, err
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}
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func render_image_with_magick(imgd *image_data, src *opened_input) (err error) {
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@ -376,18 +35,18 @@ func render_image_with_magick(imgd *image_data, src *opened_input) (err error) {
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if err != nil {
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return err
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}
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frames, err := Identify(src.FileSystemName())
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frames, err := images.IdentifyWithMagick(src.FileSystemName())
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if err != nil {
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return err
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}
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imgd.format_uppercase = frames[0].FmtUppercase
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imgd.format_uppercase = frames[0].Fmt_uppercase
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imgd.canvas_width, imgd.canvas_height = frames[0].Canvas.Width, frames[0].Canvas.Height
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set_basic_metadata(imgd)
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if !imgd.needs_conversion {
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make_output_from_input(imgd, src)
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return nil
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}
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ro := RenderOptions{RemoveAlpha: remove_alpha, Flip: flip, Flop: flop}
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ro := images.RenderOptions{RemoveAlpha: remove_alpha, Flip: flip, Flop: flop}
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if scale_image(imgd) {
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ro.ResizeTo.X, ro.ResizeTo.Y = imgd.canvas_width, imgd.canvas_height
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}
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@ -3,17 +3,26 @@
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package images
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"image"
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"image/color"
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"image/gif"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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"strings"
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"kitty/tools/tui/graphics"
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"kitty/tools/utils"
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"kitty/tools/utils/shm"
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"github.com/disintegration/imaging"
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"golang.org/x/exp/slices"
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)
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var _ = fmt.Print
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@ -64,6 +73,49 @@ func SetGIFFrameDisposal(number, anchor_frame int, disposal byte) (int, int) {
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return anchor_frame, compose_onto
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}
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func MakeTempDir(template string) (ans string, err error) {
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if template == "" {
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template = "kitty-img-*"
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}
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if shm.SHM_DIR != "" {
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ans, err = os.MkdirTemp(shm.SHM_DIR, template)
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if err == nil {
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return
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}
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}
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return os.MkdirTemp("", template)
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}
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func check_resize(frame *ImageFrame, filename string) error {
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// ImageMagick sometimes generates RGBA images smaller than the specified
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// size. See https://github.com/kovidgoyal/kitty/issues/276 for examples
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s, err := os.Stat(filename)
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if err != nil {
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return err
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}
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sz := int(s.Size())
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bytes_per_pixel := 4
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if frame.Is_opaque {
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bytes_per_pixel = 3
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}
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expected_size := bytes_per_pixel * frame.Width * frame.Height
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if sz < expected_size {
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missing := expected_size - sz
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if missing%(bytes_per_pixel*frame.Width) != 0 {
|
||||
return fmt.Errorf("ImageMagick failed to resize correctly. It generated %d < %d of data (w=%d h=%d bpp=%d)", sz, expected_size, frame.Width, frame.Height, bytes_per_pixel)
|
||||
}
|
||||
frame.Height -= missing / (bytes_per_pixel * frame.Width)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (frame *ImageFrame) set_delay(min_gap, delay int) {
|
||||
frame.Delay_ms = int32(utils.Max(min_gap, delay) * 10)
|
||||
if frame.Delay_ms == 0 {
|
||||
frame.Delay_ms = -1 // gapless frame in the graphics protocol
|
||||
}
|
||||
}
|
||||
|
||||
func open_native_gif(f io.Reader, ans *ImageData) error {
|
||||
gif_frames, err := gif.DecodeAll(f)
|
||||
if err != nil {
|
||||
@ -74,10 +126,7 @@ func open_native_gif(f io.Reader, ans *ImageData) error {
|
||||
for i, paletted_img := range gif_frames.Image {
|
||||
b := paletted_img.Bounds()
|
||||
frame := ImageFrame{Img: paletted_img, Left: b.Min.X, Top: b.Min.Y, Width: b.Dx(), Height: b.Dy(), Number: len(ans.Frames) + 1, Is_opaque: paletted_img.Opaque()}
|
||||
frame.Delay_ms = int32(utils.Max(min_gap, gif_frames.Delay[i]) * 10)
|
||||
if frame.Delay_ms == 0 {
|
||||
frame.Delay_ms = -1 // gapless frame
|
||||
}
|
||||
frame.set_delay(min_gap, gif_frames.Delay[i])
|
||||
anchor_frame, frame.Compose_onto = SetGIFFrameDisposal(frame.Number, anchor_frame, gif_frames.Disposal[i])
|
||||
ans.Frames = append(ans.Frames, &frame)
|
||||
}
|
||||
@ -109,11 +158,347 @@ func OpenNativeImageFromReader(f io.ReadSeeker) (ans *ImageData, err error) {
|
||||
return
|
||||
}
|
||||
|
||||
func OpenMagickImageFromPath(path string) (ans *ImageData, err error) {
|
||||
// TODO: Implement this
|
||||
var MagickExe = (&utils.Once[string]{Run: func() string {
|
||||
return utils.FindExe("magick")
|
||||
}}).Get
|
||||
|
||||
func RunMagick(path string, cmd []string) ([]byte, error) {
|
||||
if MagickExe() != "magick" {
|
||||
cmd = append([]string{MagickExe()}, cmd...)
|
||||
}
|
||||
c := exec.Command(cmd[0], cmd[1:]...)
|
||||
output, err := c.Output()
|
||||
if err != nil {
|
||||
var exit_err *exec.ExitError
|
||||
if errors.As(err, &exit_err) {
|
||||
return nil, fmt.Errorf("Running the command: %s\nFailed with error:\n%s", strings.Join(cmd, " "), string(exit_err.Stderr))
|
||||
}
|
||||
return nil, fmt.Errorf("Could not find the program: %#v. Is ImageMagick installed and in your PATH?", cmd[0])
|
||||
}
|
||||
return output, nil
|
||||
}
|
||||
|
||||
type IdentifyOutput struct {
|
||||
Fmt, Canvas, Transparency, Gap, Index, Size, Dpi, Dispose, Orientation string
|
||||
}
|
||||
|
||||
type IdentifyRecord struct {
|
||||
Fmt_uppercase string
|
||||
Gap int
|
||||
Canvas struct{ Width, Height, Left, Top int }
|
||||
Width, Height int
|
||||
Dpi struct{ X, Y float64 }
|
||||
Index int
|
||||
Mode graphics.GRT_f
|
||||
Needs_blend bool
|
||||
Disposal int
|
||||
Dimensions_swapped bool
|
||||
}
|
||||
|
||||
func parse_identify_record(ans *IdentifyRecord, raw *IdentifyOutput) (err error) {
|
||||
ans.Fmt_uppercase = strings.ToUpper(raw.Fmt)
|
||||
if raw.Gap != "" {
|
||||
ans.Gap, err = strconv.Atoi(raw.Gap)
|
||||
if err != nil {
|
||||
return fmt.Errorf("Invalid gap value in identify output: %s", raw.Gap)
|
||||
}
|
||||
ans.Gap = utils.Max(0, ans.Gap)
|
||||
}
|
||||
area, pos, found := strings.Cut(raw.Canvas, "+")
|
||||
ok := false
|
||||
if found {
|
||||
w, h, found := strings.Cut(area, "x")
|
||||
if found {
|
||||
ans.Canvas.Width, err = strconv.Atoi(w)
|
||||
if err == nil {
|
||||
ans.Canvas.Height, err = strconv.Atoi(h)
|
||||
if err == nil {
|
||||
x, y, found := strings.Cut(pos, "+")
|
||||
if found {
|
||||
ans.Canvas.Left, err = strconv.Atoi(x)
|
||||
if err == nil {
|
||||
ans.Canvas.Top, err = strconv.Atoi(y)
|
||||
ok = true
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if !ok {
|
||||
return fmt.Errorf("Invalid canvas value in identify output: %s", raw.Canvas)
|
||||
}
|
||||
w, h, found := strings.Cut(raw.Size, "x")
|
||||
ok = false
|
||||
if found {
|
||||
ans.Width, err = strconv.Atoi(w)
|
||||
if err == nil {
|
||||
ans.Height, err = strconv.Atoi(h)
|
||||
ok = true
|
||||
}
|
||||
}
|
||||
if !ok {
|
||||
return fmt.Errorf("Invalid size value in identify output: %s", raw.Size)
|
||||
}
|
||||
x, y, found := strings.Cut(raw.Dpi, "x")
|
||||
ok = false
|
||||
if found {
|
||||
ans.Dpi.X, err = strconv.ParseFloat(x, 64)
|
||||
if err == nil {
|
||||
ans.Dpi.Y, err = strconv.ParseFloat(y, 64)
|
||||
ok = true
|
||||
}
|
||||
}
|
||||
if !ok {
|
||||
return fmt.Errorf("Invalid dpi value in identify output: %s", raw.Dpi)
|
||||
}
|
||||
ans.Index, err = strconv.Atoi(raw.Index)
|
||||
if err != nil {
|
||||
return fmt.Errorf("Invalid index value in identify output: %s", raw.Index)
|
||||
}
|
||||
q := strings.ToLower(raw.Transparency)
|
||||
if q == "blend" || q == "true" {
|
||||
ans.Mode = graphics.GRT_format_rgba
|
||||
} else {
|
||||
ans.Mode = graphics.GRT_format_rgb
|
||||
}
|
||||
ans.Needs_blend = q == "blend"
|
||||
switch strings.ToLower(raw.Dispose) {
|
||||
case "undefined":
|
||||
ans.Disposal = 0
|
||||
case "none":
|
||||
ans.Disposal = gif.DisposalNone
|
||||
case "background":
|
||||
ans.Disposal = gif.DisposalBackground
|
||||
case "previous":
|
||||
ans.Disposal = gif.DisposalPrevious
|
||||
default:
|
||||
return fmt.Errorf("Invalid value for dispose: %s", raw.Dispose)
|
||||
}
|
||||
switch raw.Orientation {
|
||||
case "5", "6", "7", "8":
|
||||
ans.Dimensions_swapped = true
|
||||
}
|
||||
if ans.Dimensions_swapped {
|
||||
ans.Canvas.Width, ans.Canvas.Height = ans.Canvas.Height, ans.Canvas.Width
|
||||
ans.Width, ans.Height = ans.Height, ans.Width
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func IdentifyWithMagick(path string) (ans []IdentifyRecord, err error) {
|
||||
cmd := []string{"identify"}
|
||||
q := `{"fmt":"%m","canvas":"%g","transparency":"%A","gap":"%T","index":"%p","size":"%wx%h",` +
|
||||
`"dpi":"%xx%y","dispose":"%D","orientation":"%[EXIF:Orientation]"},`
|
||||
cmd = append(cmd, "-format", q, "--", path)
|
||||
output, err := RunMagick(path, cmd)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
output = bytes.TrimRight(bytes.TrimSpace(output), ",")
|
||||
raw_json := make([]byte, 0, len(output)+2)
|
||||
raw_json = append(raw_json, '[')
|
||||
raw_json = append(raw_json, output...)
|
||||
raw_json = append(raw_json, ']')
|
||||
var records []IdentifyOutput
|
||||
err = json.Unmarshal(raw_json, &records)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("The ImageMagick identify program returned malformed output, with error: %w", err)
|
||||
}
|
||||
ans = make([]IdentifyRecord, len(records))
|
||||
for i, rec := range records {
|
||||
err = parse_identify_record(&ans[i], &rec)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
return ans, nil
|
||||
}
|
||||
|
||||
type RenderOptions struct {
|
||||
RemoveAlpha *NRGBColor
|
||||
Flip, Flop bool
|
||||
ResizeTo image.Point
|
||||
OnlyFirstFrame bool
|
||||
TempfilenameTemplate string
|
||||
}
|
||||
|
||||
func RenderWithMagick(path string, ro *RenderOptions, frames []IdentifyRecord) (ans []*ImageFrame, fmap map[int]string, err error) {
|
||||
cmd := []string{"convert"}
|
||||
ans = make([]*ImageFrame, 0, len(frames))
|
||||
fmap = make(map[int]string, len(frames))
|
||||
|
||||
defer func() {
|
||||
if err != nil {
|
||||
for _, f := range fmap {
|
||||
os.Remove(f)
|
||||
}
|
||||
}
|
||||
}()
|
||||
|
||||
if ro.RemoveAlpha != nil {
|
||||
cmd = append(cmd, "-background", ro.RemoveAlpha.AsSharp(), "-alpha", "remove")
|
||||
} else {
|
||||
cmd = append(cmd, "-background", "none")
|
||||
}
|
||||
if ro.Flip {
|
||||
cmd = append(cmd, "-flip")
|
||||
}
|
||||
if ro.Flop {
|
||||
cmd = append(cmd, "-flop")
|
||||
}
|
||||
cpath := path
|
||||
if ro.OnlyFirstFrame {
|
||||
cpath += "[0]"
|
||||
}
|
||||
has_multiple_frames := len(frames) > 1
|
||||
get_multiple_frames := has_multiple_frames && !ro.OnlyFirstFrame
|
||||
cmd = append(cmd, "--", cpath, "-auto-orient")
|
||||
if ro.ResizeTo.X > 0 {
|
||||
rcmd := []string{"-resize", fmt.Sprintf("%dx%d!", ro.ResizeTo.X, ro.ResizeTo.Y)}
|
||||
if get_multiple_frames {
|
||||
cmd = append(cmd, "-coalesce")
|
||||
cmd = append(cmd, rcmd...)
|
||||
cmd = append(cmd, "-deconstruct")
|
||||
} else {
|
||||
cmd = append(cmd, rcmd...)
|
||||
}
|
||||
}
|
||||
cmd = append(cmd, "-depth", "8", "-set", "filename:f", "%w-%h-%g-%p")
|
||||
if get_multiple_frames {
|
||||
cmd = append(cmd, "+adjoin")
|
||||
}
|
||||
tdir, err := MakeTempDir(ro.TempfilenameTemplate)
|
||||
if err != nil {
|
||||
err = fmt.Errorf("Failed to create temporary directory to hold ImageMagick output with error: %w", err)
|
||||
return
|
||||
}
|
||||
defer os.RemoveAll(tdir)
|
||||
mode := "rgba"
|
||||
if frames[0].Mode == graphics.GRT_format_rgb {
|
||||
mode = "rgb"
|
||||
}
|
||||
cmd = append(cmd, filepath.Join(tdir, "im-%[filename:f]."+mode))
|
||||
_, err = RunMagick(path, cmd)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
entries, err := os.ReadDir(tdir)
|
||||
if err != nil {
|
||||
err = fmt.Errorf("Failed to read temp dir used to store ImageMagick output with error: %w", err)
|
||||
return
|
||||
}
|
||||
base_dir := filepath.Dir(tdir)
|
||||
gaps := make([]int, len(frames))
|
||||
for i, frame := range frames {
|
||||
gaps[i] = frame.Gap
|
||||
}
|
||||
min_gap := CalcMinimumGIFGap(gaps)
|
||||
for _, entry := range entries {
|
||||
fname := entry.Name()
|
||||
p, _, _ := strings.Cut(fname, ".")
|
||||
parts := strings.Split(p, "-")
|
||||
if len(parts) < 5 {
|
||||
continue
|
||||
}
|
||||
index, cerr := strconv.Atoi(parts[len(parts)-1])
|
||||
if cerr != nil || index < 0 || index >= len(frames) {
|
||||
continue
|
||||
}
|
||||
width, cerr := strconv.Atoi(parts[1])
|
||||
if cerr != nil {
|
||||
continue
|
||||
}
|
||||
height, cerr := strconv.Atoi(parts[2])
|
||||
if cerr != nil {
|
||||
continue
|
||||
}
|
||||
_, pos, found := strings.Cut(parts[3], "+")
|
||||
if !found {
|
||||
continue
|
||||
}
|
||||
px, py, found := strings.Cut(pos, "+")
|
||||
if !found {
|
||||
continue
|
||||
}
|
||||
x, cerr := strconv.Atoi(px)
|
||||
if cerr != nil {
|
||||
continue
|
||||
}
|
||||
y, cerr := strconv.Atoi(py)
|
||||
if cerr != nil {
|
||||
continue
|
||||
}
|
||||
identify_data := frames[index]
|
||||
df, cerr := os.CreateTemp(base_dir, graphics.TempTemplate+"."+mode)
|
||||
if cerr != nil {
|
||||
err = fmt.Errorf("Failed to create a temporary file in %s with error: %w", base_dir, cerr)
|
||||
return
|
||||
}
|
||||
err = os.Rename(filepath.Join(tdir, fname), df.Name())
|
||||
if err != nil {
|
||||
err = fmt.Errorf("Failed to rename a temporary file in %s with error: %w", tdir, err)
|
||||
return
|
||||
}
|
||||
df.Close()
|
||||
fmap[index+1] = df.Name()
|
||||
frame := ImageFrame{
|
||||
Number: index + 1, Width: width, Height: height, Left: x, Top: y, Is_opaque: identify_data.Mode == graphics.GRT_format_rgb,
|
||||
}
|
||||
frame.set_delay(min_gap, identify_data.Gap)
|
||||
err = check_resize(&frame, df.Name())
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
ans = append(ans, &frame)
|
||||
}
|
||||
if len(ans) < len(frames) {
|
||||
err = fmt.Errorf("Failed to render %d out of %d frames", len(frames)-len(ans), len(frames))
|
||||
return
|
||||
}
|
||||
slices.SortFunc(ans, func(a, b *ImageFrame) bool { return a.Number < b.Number })
|
||||
anchor_frame := 1
|
||||
for i, frame := range ans {
|
||||
anchor_frame, frame.Compose_onto = SetGIFFrameDisposal(frame.Number, anchor_frame, byte(frames[i].Disposal))
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func OpenMagickImageFromPath(path string) (ans *ImageData, err error) {
|
||||
identify_records, err := IdentifyWithMagick(path)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("Failed to identify image at %#v with error: %w", path, err)
|
||||
}
|
||||
frames, filenames, err := RenderWithMagick(path, &RenderOptions{}, identify_records)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer func() {
|
||||
for _, f := range filenames {
|
||||
os.Remove(f)
|
||||
}
|
||||
}()
|
||||
|
||||
for _, frame := range frames {
|
||||
filename := filenames[frame.Number]
|
||||
data, err := os.ReadFile(filename)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
dest_rect := image.Rect(0, 0, frame.Width, frame.Height)
|
||||
if frame.Is_opaque {
|
||||
frame.Img = &NRGB{Pix: data, Stride: frame.Width * 3, Rect: dest_rect}
|
||||
} else {
|
||||
frame.Img = &image.NRGBA{Pix: data, Stride: frame.Width * 4, Rect: dest_rect}
|
||||
}
|
||||
}
|
||||
ans = &ImageData{
|
||||
Width: frames[0].Width, Height: frames[0].Height, Format_uppercase: identify_records[0].Fmt_uppercase, Frames: frames,
|
||||
}
|
||||
return ans, nil
|
||||
}
|
||||
|
||||
func OpenImageFromPath(path string) (ans *ImageData, err error) {
|
||||
mt := utils.GuessMimeType(path)
|
||||
if DecodableImageTypes[mt] {
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user