X-Git-Url: https://git.draconx.ca/gitweb/liblbx.git/blobdiff_plain/91689c5ef8174cc65e1f3ce31f9869778b2af671..256cc05240e58eb10bb4ffd44e942ed28f00c27e:/src/image.c
diff --git a/src/image.c b/src/image.c
index 5f3a6e3..1525fb2 100644
--- a/src/image.c
+++ b/src/image.c
@@ -1,7 +1,7 @@
/*
* 2ooM: The Master of Orion II Reverse Engineering Project
* Library for working with LBX image files.
- * Copyright (C) 2006-2008 Nick Bowler
+ * Copyright (C) 2006-2010 Nick Bowler
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -16,10 +16,7 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
+#include
#include
#include
#include
@@ -28,6 +25,7 @@
#include "pack.h"
#include "misc.h"
#include "lbx.h"
+#include "error.h"
#include "image.h"
#define FLAG_RAW 0x0100 /* Image is stored as a flat array of bytes. */
@@ -67,7 +65,7 @@ static struct lbx_image *lbximg_init(unsigned char hdr[static HDR_LEN])
img = malloc(sizeof *img + sizeof img->offsets[0] * (nframes+1));
if (!img) {
- lbx_errno = -errno;
+ lbx_error_raise(LBX_ENOMEM);
return NULL;
}
@@ -94,9 +92,8 @@ struct lbx_image *lbximg_open(void *f, const struct lbx_file_ops *fops,
struct lbx_image *img;
if (fops->read(hdr_buf, sizeof hdr_buf, f) != sizeof hdr_buf) {
- lbx_errno = -errno;
if (fops->eof(f))
- lbx_errno = LBX_EEOF;
+ lbx_error_raise(LBX_EEOF);
return NULL;
}
@@ -124,9 +121,8 @@ struct lbx_image *lbximg_open(void *f, const struct lbx_file_ops *fops,
unsigned char buf[4];
if (fops->read(buf, sizeof buf, f) != sizeof buf) {
- lbx_errno = -errno;
if (fops->eof(f))
- lbx_errno = LBX_EEOF;
+ lbx_error_raise(LBX_EEOF);
free(img);
return NULL;
}
@@ -138,9 +134,8 @@ struct lbx_image *lbximg_open(void *f, const struct lbx_file_ops *fops,
unsigned char buf[4];
if (fops->read(buf, sizeof buf, f) != sizeof buf) {
- lbx_errno = -errno;
if (fops->eof(f))
- lbx_errno = LBX_EEOF;
+ lbx_error_raise(LBX_EEOF);
free(img);
return NULL;
}
@@ -150,7 +145,7 @@ struct lbx_image *lbximg_open(void *f, const struct lbx_file_ops *fops,
img->paloff = fops->tell(f);
if (img->palstart + img->palcount > 256) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
free(img);
return NULL;
}
@@ -159,9 +154,41 @@ struct lbx_image *lbximg_open(void *f, const struct lbx_file_ops *fops,
return img;
}
-struct lbx_image *lbximg_fopen(FILE *f)
+static int pipe_close(void *f)
+{
+ struct lbx_pipe_state *p = f;
+ int rc;
+
+ rc = fclose(p->f);
+ free(p);
+ return rc;
+}
+
+static int file_close(void *f)
+{
+ return fclose((FILE *)f);
+}
+
+struct lbx_image *lbximg_fopen(const char *file)
{
- return lbximg_open(f, &lbx_default_fops, NULL);
+ struct lbx_pipe_state *p;
+ FILE *f;
+
+ f = fopen(file, "rb");
+ if (!f)
+ return NULL;
+
+ if (fseek(f, 0, SEEK_CUR) == 0)
+ return lbximg_open(f, &lbx_default_fops, file_close);
+
+ p = malloc(sizeof *p);
+ if (!p) {
+ fclose(f);
+ return NULL;
+ }
+
+ *p = (struct lbx_pipe_state) { .f = f };
+ return lbximg_open(p, &lbx_pipe_fops, pipe_close);
}
static int _lbx_drawrow(int first, struct lbx_image *img)
@@ -199,7 +226,7 @@ static int _lbx_drawrow(int first, struct lbx_image *img)
/* Ensure that the row fits in the image. */
if (img->height - img->currenty <= yval || xval >= img->width) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
return -1;
}
@@ -209,7 +236,7 @@ static int _lbx_drawrow(int first, struct lbx_image *img)
xval = unpack_16_le(buf+2);
if (img->width - img->currentx <= xval) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
return -1;
}
img->currentx += xval;
@@ -218,7 +245,7 @@ static int _lbx_drawrow(int first, struct lbx_image *img)
}
if (count > img->width - img->currentx) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
return -1;
}
@@ -238,9 +265,8 @@ static int _lbx_drawrow(int first, struct lbx_image *img)
return 0;
readerr:
- lbx_errno = -errno;
if (img->fops->eof(img->f))
- lbx_errno = LBX_EEOF;
+ lbx_error_raise(LBX_EEOF);
return -1;
}
@@ -251,13 +277,13 @@ static unsigned char **allocframebuffer(size_t width, size_t height)
tmp = calloc(height, width);
if (!tmp) {
- lbx_errno = -errno;
+ lbx_error_raise(LBX_ENOMEM);
return NULL;
}
new = malloc(height * sizeof *new);
if (!new) {
- lbx_errno = -errno;
+ lbx_error_raise(LBX_ENOMEM);
free(tmp);
return NULL;
}
@@ -276,20 +302,18 @@ static unsigned char **read_raw_frame(struct lbx_image *img, int frame)
assert(img->flags & FLAG_RAW);
if (img->fops->seek(img->f, img->offsets[frame], SEEK_SET)) {
- lbx_errno = -errno;
return NULL;
}
if (img->fops->read(img->framedata[0], size, img->f) != size) {
- lbx_errno = -errno;
if (img->fops->eof(img->f))
- lbx_errno = LBX_EEOF;
+ lbx_error_raise(LBX_EEOF);
return NULL;
}
memset(img->mask[0], 1, size);
if (img->fops->tell(img->f) > img->offsets[frame+1]) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
return NULL;
}
@@ -299,7 +323,7 @@ static unsigned char **read_raw_frame(struct lbx_image *img, int frame)
unsigned char **lbximg_getframe(struct lbx_image *img, int frame)
{
if (frame >= img->frames || frame < 0) {
- lbx_errno = LBX_ERANGE;
+ lbx_error_raise(LBX_ENOENT);
return NULL;
}
@@ -342,7 +366,6 @@ unsigned char **lbximg_getframe(struct lbx_image *img, int frame)
int rc, first = 1;
if (img->fops->seek(img->f, img->offsets[frame], SEEK_SET)) {
- lbx_errno = -errno;
return NULL;
}
@@ -353,7 +376,7 @@ unsigned char **lbximg_getframe(struct lbx_image *img, int frame)
first = 0;
if (img->fops->tell(img->f) > img->offsets[frame+1]) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
return NULL;
}
} while (!rc);
@@ -372,12 +395,13 @@ lbximg_loadpalette(void *f, const struct lbx_file_ops *fops,
for (i = 0; i < 256; i++) {
if (fops->read(entry, sizeof entry, f) != sizeof entry) {
- lbx_errno = (feof(f)) ? LBX_EEOF : -errno;
+ if (fops->eof(f))
+ lbx_error_raise(LBX_EEOF);
return -1;
}
if (entry[0] != 1) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
return -1;
}
@@ -404,7 +428,6 @@ lbximg_getpalette(struct lbx_image *img, struct lbx_colour palette[static 256])
return 0;
if (img->fops->seek(img->f, img->paloff, SEEK_SET)) {
- lbx_errno = -errno;
return -1;
}
@@ -415,7 +438,7 @@ lbximg_getpalette(struct lbx_image *img, struct lbx_colour palette[static 256])
}
if (entry[0] != 0) {
- lbx_errno = LBX_EFORMAT;
+ lbx_error_raise(LBX_EFORMAT);
return -1;
}
@@ -429,7 +452,8 @@ lbximg_getpalette(struct lbx_image *img, struct lbx_colour palette[static 256])
return 0;
readerr:
- lbx_errno = img->fops->eof(img->f) ? LBX_EEOF : -errno;
+ if (img->fops->eof(img->f))
+ lbx_error_raise(LBX_EEOF);
return -1;
}