From d75be522869a2430355dfe83a96624f39a8fb370 Mon Sep 17 00:00:00 2001
From: John Hawthorn <jhawthor@uvic.ca>
Date: Mon, 31 Aug 2009 00:36:38 -0700
Subject: experimental support for imagemagick backend

---
 src/bmp.c         |  2 ++
 src/gif.c         |  2 ++
 src/imagemagick.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/jpeg.c        |  3 +++
 src/main.c        |  8 ++------
 src/meh.h         |  9 ++++++++
 src/netpbm.c      | 11 ++++++++--
 src/png.c         |  2 ++
 8 files changed, 90 insertions(+), 8 deletions(-)
 create mode 100644 src/imagemagick.c

(limited to 'src')

diff --git a/src/bmp.c b/src/bmp.c
index 33ba589..6fea4bf 100644
--- a/src/bmp.c
+++ b/src/bmp.c
@@ -102,6 +102,8 @@ struct image *bmp_open(FILE *f){
 		b->rowwidth += 4 - (b->rowwidth & 3);
 	}
 
+  b->img.fmt = &bmp;
+
 	return (struct image *)b;
 }
 
diff --git a/src/gif.c b/src/gif.c
index 17e5d4d..8887efd 100644
--- a/src/gif.c
+++ b/src/gif.c
@@ -45,6 +45,8 @@ static struct image *gif_open(FILE *f){
 	g->img.bufwidth = gif->SWidth;
 	g->img.bufheight = gif->SHeight;
 
+  g->img.fmt = &giflib;
+
 	return (struct image *)g;
 }
 
diff --git a/src/imagemagick.c b/src/imagemagick.c
new file mode 100644
index 0000000..3c4a9cd
--- /dev/null
+++ b/src/imagemagick.c
@@ -0,0 +1,61 @@
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+#include "meh.h"
+
+struct image *imagemagick_open(FILE *f){
+  char template[] = "/tmp/fileXXXXXX";
+  char *ntmp = mktemp(template);
+  if(!ntmp){
+    perror("mktemp");
+    exit(EXIT_FAILURE);
+  }
+
+  int pid;
+  if(!(pid = fork())){
+    int origfd = fileno(f);
+    if(lseek(origfd, 0, SEEK_SET) != 0){
+      perror("lseek");
+      exit(EXIT_FAILURE);
+    }
+
+    char *argv[6];
+
+    argv[0] = "convert";
+    argv[1] = "-depth";
+    argv[2] = "255";
+    asprintf(&argv[3], "fd:%i", origfd);
+    asprintf(&argv[4], "ppm:%s", ntmp);
+    argv[5] = NULL;
+    execvp(argv[0], argv);
+    perror("exec");
+    exit(EXIT_FAILURE);
+  }else{
+    int status;
+    waitpid(pid, &status, 0);
+    if(status){
+      return NULL;
+    }
+    fclose(f);
+    FILE *ftmp;
+    if(!(ftmp = fopen(ntmp, "rb"))){
+      perror("fopen");
+      exit(EXIT_FAILURE);
+    }
+    return netpbm.open(ftmp);
+  }
+}
+
+struct imageformat imagemagick = {
+	imagemagick_open,
+	NULL,
+	NULL,
+	NULL
+};
+
diff --git a/src/jpeg.c b/src/jpeg.c
index 26e60d1..fbe53f6 100644
--- a/src/jpeg.c
+++ b/src/jpeg.c
@@ -51,6 +51,9 @@ static struct image *jpeg_open(FILE *f){
 	}
 
 	j->jerr.pub.error_exit = error_exit;
+
+  j->img.fmt = &libjpeg;
+
 	return (struct image *)j;
 }
 
diff --git a/src/main.c b/src/main.c
index 3a669c6..54b5e22 100644
--- a/src/main.c
+++ b/src/main.c
@@ -22,17 +22,13 @@ static int mode;
 extern Display *display;
 
 /* Supported Formats */
-extern struct imageformat libjpeg;
-extern struct imageformat giflib;
-extern struct imageformat libpng;
-extern struct imageformat bmp;
-extern struct imageformat netpbm;
 struct imageformat *formats[] = {
 	&libjpeg,
 	&bmp,
 	&libpng,
 	&netpbm,
 	&giflib, /* HACK! make gif last (uses read()) */
+	&imagemagick,
 	NULL
 };
 
@@ -50,7 +46,7 @@ struct image *newimage(FILE *f){
 	struct imageformat **fmt = formats;
 	for(fmt = formats; *fmt; fmt++){
 		if((img = (*fmt)->open(f))){
-			img->fmt = *fmt;
+			//img->fmt = *fmt;
 			img->ximg = NULL;
 			img->state = NONE;
 			return img;
diff --git a/src/meh.h b/src/meh.h
index 8465887..88f36e3 100644
--- a/src/meh.h
+++ b/src/meh.h
@@ -49,3 +49,12 @@ printf("%s: %li e2 us\n", (x), ((t1.tv_sec - t0.tv_sec) * 1000000 + t1.tv_usec -
 #define TDEBUG_END(x)
 #endif
 
+/* Supported Formats */
+extern struct imageformat libjpeg;
+extern struct imageformat giflib;
+extern struct imageformat libpng;
+extern struct imageformat bmp;
+extern struct imageformat netpbm;
+extern struct imageformat imagemagick;
+
+
diff --git a/src/netpbm.c b/src/netpbm.c
index d87872f..ef61c8e 100644
--- a/src/netpbm.c
+++ b/src/netpbm.c
@@ -54,6 +54,7 @@ struct image *netpbm_open(FILE *f){
 	fgetc(f);
 
 	b->f = f;
+	b->img.fmt = &netpbm;
 
 	return (struct image *)b;
 }
@@ -66,8 +67,14 @@ static unsigned char readvali(struct netpbm_t *b){
 }
 
 static unsigned char readvalb(struct netpbm_t *b){
-	int val = fgetc(b->f);
-	return val * 255 / b->maxval;
+  if(b->maxval == 65535){
+    int val = fgetc(b->f) << 8;
+    val |= fgetc(b->f);
+    return val * 255 / b->maxval;
+  }else{
+    int val = fgetc(b->f);
+    return val * 255 / b->maxval;
+  }
 }
 
 int netpbm_read(struct image *img){
diff --git a/src/png.c b/src/png.c
index 9aab2f8..4dea588 100644
--- a/src/png.c
+++ b/src/png.c
@@ -57,6 +57,8 @@ struct image *png_open(FILE *f){
 	p->img.bufwidth = png_get_image_width(p->png_ptr, p->info_ptr);
 	p->img.bufheight = png_get_image_height(p->png_ptr, p->info_ptr);
 
+  p->img.fmt = &libpng;
+
 	return (struct image *)p;
 }
 
-- 
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