1 files changed, 202 insertions, 0 deletions
diff --git a/imageprocessor/gm/gm.go b/imageprocessor/gm/gm.go
new file mode 100644
index 0000000..e9e76d9
--- /dev/null
+++ b/imageprocessor/gm/gm.go
@@ -0,0 +1,202 @@
+package gm
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"log"
+	"os/exec"
+	"time"
+)
+
+const GM_COMMAND = "convert"
+
+func ConvertToJpeg(filename string) (string, error) {
+	outfile := fmt.Sprintf("%s_jpg", filename)
+
+	args := []string{
+		filename,
+		"-flatten",
+		"JPEG:" + outfile,
+	}
+
+	err := runConvertCommand(args)
+	if err != nil {
+		return "", err
+	}
+
+	return outfile, nil
+}
+
+func FixOrientation(filename string) (string, error) {
+	outfile := fmt.Sprintf("%s_ort", filename)
+
+	args := []string{
+		filename,
+		"-auto-orient",
+		outfile,
+	}
+
+	err := runConvertCommand(args)
+	if err != nil {
+		return "", err
+	}
+
+	return outfile, nil
+}
+
+func Quality(filename string, quality int) (string, error) {
+	outfile := fmt.Sprintf("%s_q", filename)
+
+	args := []string{
+		filename,
+		"-quality",
+		fmt.Sprintf("%d", quality),
+		"-density",
+		"72x72",
+		outfile,
+	}
+
+	err := runConvertCommand(args)
+	if err != nil {
+		return "", err
+	}
+
+	return outfile, nil
+}
+
+func ResizePercent(filename string, percent int) (string, error) {
+	outfile := fmt.Sprintf("%s_rp", filename)
+
+	args := []string{
+		filename,
+		"-resize",
+		fmt.Sprintf("%d%%", percent),
+		outfile,
+	}
+
+	err := runConvertCommand(args)
+	if err != nil {
+		return "", err
+	}
+
+	return outfile, nil
+}
+
+func SquareThumb(filename, name string, size int) (string, error) {
+	outfile := fmt.Sprintf("%s_%s", filename, name)
+
+	args := []string{
+		fmt.Sprintf("%s[0]", filename),
+		"-quality",
+		"94",
+		"-resize",
+		fmt.Sprintf("%dx%d^", size, size),
+		"-gravity",
+		"center",
+		"-crop",
+		fmt.Sprintf("%dx%d+0+0", size, size),
+		"-density",
+		"72x72",
+		"-unsharp",
+		"0.5",
+		fmt.Sprintf("JPG:%s", outfile),
+	}
+
+	err := runConvertCommand(args)
+	if err != nil {
+		return "", err
+	}
+
+	return outfile, nil
+}
+
+func Thumb(filename, name string, width, height int) (string, error) {
+	outfile := fmt.Sprintf("%s_%s", filename, name)
+
+	args := []string{
+		fmt.Sprintf("%s[0]", filename),
+		"-quality",
+		"83",
+		"-resize",
+		fmt.Sprintf("%dx%d>", width, height),
+		"-density",
+		"72x72",
+		fmt.Sprintf("JPG:%s", outfile),
+	}
+
+	err := runConvertCommand(args)
+	if err != nil {
+		return "", err
+	}
+
+	return outfile, nil
+}
+
+func CircleThumb(filename, name string, width int) (string, error) {
+	outfile := fmt.Sprintf("%s_%s", filename, name)
+
+	filename, err := Thumb(filename, name, width*2, width*2)
+	if err != nil {
+		return "", err
+	}
+
+	args := []string{
+		"-size",
+		fmt.Sprintf("%dx%d", width, width),
+		"xc:none",
+		"-fill",
+		filename,
+		"-quality",
+		"83",
+		"-density",
+		"72x72",
+		"-draw",
+		fmt.Sprintf("circle %d,%d %d,1", width/2, width/2, width/2),
+		fmt.Sprintf("PNG:%s", outfile),
+	}
+
+	err = runConvertCommand(args)
+	if err != nil {
+		return "", err
+	}
+
+	return outfile, nil
+}
+
+func runConvertCommand(args []string) error {
+	cmd := exec.Command(GM_COMMAND, args...)
+
+	var out bytes.Buffer
+	var stderr bytes.Buffer
+	cmd.Stdout = &out
+	cmd.Stderr = &stderr
+
+	cmd.Start()
+
+	cmdDone := make(chan error, 1)
+	go func() {
+		cmdDone <- cmd.Wait()
+	}()
+
+	select {
+	case <-time.After(time.Duration(500000) * time.Millisecond):
+		killCmd(cmd)
+		<-cmdDone
+		return errors.New("Command timed out")
+	case err := <-cmdDone:
+		if err != nil {
+			log.Println(stderr.String())
+		}
+
+		return err
+	}
+
+	return nil
+}
+
+func killCmd(cmd *exec.Cmd) {
+	if err := cmd.Process.Kill(); err != nil {
+		log.Printf("Failed to kill command: %v", err)
+	}
+}