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More fixes for #77807:

Browse Source 
* io-tga.c (get_contiguous_pixbuf): Helper function to create
	a pixbuf with a contiguous pixel array while being careful about
	overflow.

	* io-tga.c (fill_in_context, get_image_pseudocolor,
	get_image_truecolor, get_image_grayscale): Use
	get_contiguous_pixbuf instead of manually allocating image
	storage.

	* io-xpm.c (pixbuf_create_from_xpm):
	* io-pnm.c (gdk_pixbuf__pnm_image_load):
	* io-jpeg.c (gdk_pixbuf__jpeg_image_load): Use gdk_pixbuf_new
	instead of manually allocating image storage.
This commit is contained in:
Matthias Clasen 2002-04-11 21:18:40 +00:00
parent e60568a1da
commit 6939510851
5 changed files with 209 additions and 167 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
gdk-pixbuf/ChangeLog
View File

@ -1,3 +1,21 @@
2002-04-11 Matthias Clasen <maclas@gmx.de>
More fixes for #77807:
* io-tga.c (get_contiguous_pixbuf): Helper function to create
a pixbuf with a contiguous pixel array while being careful about
overflow.
* io-tga.c (fill_in_context, get_image_pseudocolor,
get_image_truecolor, get_image_grayscale): Use
get_contiguous_pixbuf instead of manually allocating image
storage.
* io-xpm.c (pixbuf_create_from_xpm):
* io-pnm.c (gdk_pixbuf__pnm_image_load):
* io-jpeg.c (gdk_pixbuf__jpeg_image_load): Use gdk_pixbuf_new
instead of manually allocating image storage.
2002-04-09 Matthias Clasen <maclas@gmx.de>
* gdk-pixbuf-loader.c (gdk_pixbuf_loader_load_module): Use

227
gdk-pixbuf/io-jpeg.c
View File

@ -58,7 +58,7 @@
/* we are a "source manager" as far as libjpeg is concerned */
#define JPEG_PROG_BUF_SIZE 4096
#define JPEG_PROG_BUF_SIZE 65536
typedef struct {
struct jpeg_source_mgr pub; /* public fields */
@ -89,6 +89,7 @@ typedef struct {
gboolean did_prescan; /* are we in image data yet? */
gboolean got_header; /* have we loaded jpeg header? */
gboolean src_initialized;/* TRUE when jpeg lib initialized */
gboolean in_output; /* did we get suspended in an output pass? */
struct jpeg_decompress_struct cinfo;
struct error_handler_data jerr;
} JpegProgContext;
@ -139,14 +140,6 @@ output_message_handler (j_common_ptr cinfo)
/* do nothing */
}
/* Destroy notification function for the pixbuf */
static void
free_buffer (guchar *pixels, gpointer data)
{
g_free (pixels);
}
/* explode gray image data from jpeg library into rgb components in pixbuf */
static void
explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
@ -177,12 +170,76 @@ explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
}
}
typedef struct {
struct jpeg_source_mgr pub; /* public fields */
FILE * infile; /* source stream */
JOCTET * buffer; /* start of buffer */
boolean start_of_file; /* have we gotten any data yet? */
} stdio_source_mgr;
typedef stdio_source_mgr * stdio_src_ptr;
static void
stdio_init_source (j_decompress_ptr cinfo)
{
stdio_src_ptr src = (stdio_src_ptr)cinfo->src;
src->start_of_file = FALSE;
}
static boolean
stdio_fill_input_buffer (j_decompress_ptr cinfo)
{
stdio_src_ptr src = (stdio_src_ptr) cinfo->src;
size_t nbytes;
nbytes = fread (src->buffer, 1, JPEG_PROG_BUF_SIZE, src->infile);
if (nbytes <= 0) {
#if 0
if (src->start_of_file) /* Treat empty input file as fatal error */
ERREXIT(cinfo, JERR_INPUT_EMPTY);
WARNMS(cinfo, JWRN_JPEG_EOF);
#endif
/* Insert a fake EOI marker */
src->buffer[0] = (JOCTET) 0xFF;
src->buffer[1] = (JOCTET) JPEG_EOI;
nbytes = 2;
}
src->pub.next_input_byte = src->buffer;
src->pub.bytes_in_buffer = nbytes;
src->start_of_file = FALSE;
return TRUE;
}
static void
stdio_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
{
stdio_src_ptr src = (stdio_src_ptr) cinfo->src;
if (num_bytes > 0) {
while (num_bytes > (long) src->pub.bytes_in_buffer) {
num_bytes -= (long) src->pub.bytes_in_buffer;
(void)stdio_fill_input_buffer(cinfo);
}
src->pub.next_input_byte += (size_t) num_bytes;
src->pub.bytes_in_buffer -= (size_t) num_bytes;
}
}
static void
stdio_term_source (j_decompress_ptr cinfo)
{
}
/* Shared library entry point */
static GdkPixbuf *
gdk_pixbuf__jpeg_image_load (FILE *f, GError **error)
{
gint w, h, i;
guchar * volatile pixels = NULL;
gint i;
GdkPixbuf * volatile pixbuf = NULL;
guchar *dptr;
guchar *lines[4]; /* Used to expand rows, via rec_outbuf_height,
* from the header file:
@ -192,6 +249,7 @@ gdk_pixbuf__jpeg_image_load (FILE *f, GError **error)
guchar **lptr;
struct jpeg_decompress_struct cinfo;
struct error_handler_data jerr;
stdio_src_ptr src;
/* setup error handler */
cinfo.err = jpeg_std_error (&jerr.pub);
@ -202,8 +260,8 @@ gdk_pixbuf__jpeg_image_load (FILE *f, GError **error)
if (sigsetjmp (jerr.setjmp_buffer, 1)) {
/* Whoops there was a jpeg error */
if (pixels)
g_free (pixels);
if (pixbuf)
g_object_unref (pixbuf);
jpeg_destroy_decompress (&cinfo);
return NULL;
@ -211,17 +269,32 @@ gdk_pixbuf__jpeg_image_load (FILE *f, GError **error)
/* load header, setup */
jpeg_create_decompress (&cinfo);
jpeg_stdio_src (&cinfo, f);
cinfo.src = (struct jpeg_source_mgr *)
(*cinfo.mem->alloc_small) ((j_common_ptr) &cinfo, JPOOL_PERMANENT,
sizeof (stdio_source_mgr));
src = (stdio_src_ptr) cinfo.src;
src->buffer = (JOCTET *)
(*cinfo.mem->alloc_small) ((j_common_ptr) &cinfo, JPOOL_PERMANENT,
JPEG_PROG_BUF_SIZE * sizeof (JOCTET));
src->pub.init_source = stdio_init_source;
src->pub.fill_input_buffer = stdio_fill_input_buffer;
src->pub.skip_input_data = stdio_skip_input_data;
src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
src->pub.term_source = stdio_term_source;
src->infile = f;
src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
src->pub.next_input_byte = NULL; /* until buffer loaded */
jpeg_read_header (&cinfo, TRUE);
jpeg_start_decompress (&cinfo);
cinfo.do_fancy_upsampling = FALSE;
cinfo.do_block_smoothing = FALSE;
w = cinfo.output_width;
h = cinfo.output_height;
pixels = g_try_malloc (h * w * 3);
if (!pixels) {
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, cinfo.output_width, cinfo.output_height);
if (!pixbuf) {
jpeg_destroy_decompress (&cinfo);
/* broken check for *error == NULL for robustness against
@ -237,7 +310,7 @@ gdk_pixbuf__jpeg_image_load (FILE *f, GError **error)
return NULL;
}
dptr = pixels;
dptr = pixbuf->pixels;
/* decompress all the lines, a few at a time */
@ -245,7 +318,7 @@ gdk_pixbuf__jpeg_image_load (FILE *f, GError **error)
lptr = lines;
for (i = 0; i < cinfo.rec_outbuf_height; i++) {
*lptr++ = dptr;
dptr += w * 3;
dptr += pixbuf->rowstride;
}
jpeg_read_scanlines (&cinfo, lines, cinfo.rec_outbuf_height);
@ -257,9 +330,7 @@ gdk_pixbuf__jpeg_image_load (FILE *f, GError **error)
jpeg_finish_decompress (&cinfo);
jpeg_destroy_decompress (&cinfo);
return gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, FALSE, 8,
w, h, w * 3,
free_buffer, NULL);
return pixbuf;
}
@ -333,6 +404,7 @@ gdk_pixbuf__jpeg_image_begin_load (ModulePreparedNotifyFunc prepared_func,
context->got_header = FALSE;
context->did_prescan = FALSE;
context->src_initialized = FALSE;
context->in_output = FALSE;
/* create libjpeg structures */
jpeg_create_decompress (&context->cinfo);
@ -483,9 +555,6 @@ gdk_pixbuf__jpeg_image_load_increment (gpointer data,
num_copy = MIN (JPEG_PROG_BUF_SIZE - src->pub.bytes_in_buffer,
num_left);
/* if (num_copy == 0)
g_error ("Buffer overflow!");
*/
memcpy(src->buffer + src->pub.bytes_in_buffer, bufhd,num_copy);
src->pub.next_input_byte = src->buffer;
src->pub.bytes_in_buffer += num_copy;
@ -518,13 +587,6 @@ gdk_pixbuf__jpeg_image_load_increment (gpointer data,
context->got_header = TRUE;
#if 0
if (jpeg_has_multiple_scans (cinfo)) {
g_print ("io-jpeg.c: Does not currently "
"support progressive jpeg files.\n");
return FALSE;
}
#endif
context->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
FALSE,
8,
@ -549,75 +611,70 @@ gdk_pixbuf__jpeg_image_load_increment (gpointer data,
} else if (!context->did_prescan) {
int rc;
/* start decompression */
cinfo->buffered_image = TRUE;
rc = jpeg_start_decompress (cinfo);
cinfo->do_fancy_upsampling = FALSE;
cinfo->do_block_smoothing = FALSE;
if (rc == JPEG_SUSPENDED)
continue;
context->did_prescan = TRUE;
} else {
/* we're decompressing so feed jpeg lib scanlines */
guchar *lines[4];
guchar **lptr;
guchar *rowptr;
gint nlines, i;
gint start_scanline;
/* keep going until we've done all scanlines */
while (cinfo->output_scanline < cinfo->output_height) {
start_scanline = cinfo->output_scanline;
lptr = lines;
rowptr = context->dptr;
for (i=0; i < cinfo->rec_outbuf_height; i++) {
*lptr++ = rowptr;
rowptr += context->pixbuf->rowstride;
/* keep going until we've done all passes */
while (!jpeg_input_complete (cinfo)) {
if (!context->in_output) {
if (jpeg_start_output (cinfo, cinfo->input_scan_number)) {
context->in_output = TRUE;
context->dptr = context->pixbuf->pixels;
}
else
break;
}
/* keep going until we've done all scanlines */
while (cinfo->output_scanline < cinfo->output_height) {
lptr = lines;
rowptr = context->dptr;
for (i=0; i < cinfo->rec_outbuf_height; i++) {
*lptr++ = rowptr;
rowptr += context->pixbuf->rowstride;
}
nlines = jpeg_read_scanlines (cinfo, lines,
cinfo->rec_outbuf_height);
if (nlines == 0)
break;
nlines = jpeg_read_scanlines (cinfo, lines,
cinfo->rec_outbuf_height);
if (nlines == 0)
/* handle gray */
if (cinfo->output_components == 1)
explode_gray_into_buf (cinfo, lines);
context->dptr += nlines * context->pixbuf->rowstride;
/* send updated signal */
(* context->updated_func) (context->pixbuf,
0,
cinfo->output_scanline-1,
cinfo->image_width,
nlines,
context->user_data);
}
if (cinfo->output_scanline >= cinfo->output_height &&
jpeg_finish_output (cinfo))
context->in_output = FALSE;
else
break;
/* handle gray */
if (cinfo->output_components == 1)
explode_gray_into_buf (cinfo, lines);
context->dptr += nlines * context->pixbuf->rowstride;
/* send updated signal */
(* context->updated_func) (context->pixbuf,
0,
cinfo->output_scanline-1,
cinfo->image_width,
nlines,
context->user_data);
#undef DEBUG_JPEG_PROGRESSIVE
#ifdef DEBUG_JPEG_PROGRESSIVE
if (start_scanline != cinfo->output_scanline)
g_print("jpeg: Input pass=%2d, next input scanline=%3d,"
" emitted %3d - %3d\n",
cinfo->input_scan_number, cinfo->input_iMCU_row * 16,
start_scanline, cinfo->output_scanline - 1);
g_print ("Scanline %d of %d - ",
cinfo->output_scanline,
cinfo->output_height);
/* g_print ("rec_height %d -", cinfo->rec_outbuf_height); */
g_print ("Processed %d lines - bytes left = %d\n",
nlines, cinfo->src->bytes_in_buffer);
#endif
}
/* did entire image */
if (cinfo->output_scanline >= cinfo->output_height)
if (jpeg_input_complete (cinfo))
/* did entire image */
return TRUE;
else
continue;
@ -642,7 +699,7 @@ gdk_pixbuf__jpeg_image_save (FILE *f,
guchar *pixels = NULL;
JSAMPROW *jbuf;
int y = 0;
int quality = 75; /* default; must be between 0 and 100 */
volatile int quality = 75; /* default; must be between 0 and 100 */
int i, j;
int w, h = 0;
int rowstride = 0;

21
gdk-pixbuf/io-pnm.c
View File

@ -93,13 +93,6 @@ static gboolean gdk_pixbuf__pnm_image_load_increment (gpointer context,
static void explode_bitmap_into_buf (PnmLoaderContext *context);
static void explode_gray_into_buf (PnmLoaderContext *context);
/* Destroy notification function for the pixbuf */
static void
free_buffer (guchar *pixels, gpointer data)
{
g_free (pixels);
}
/* explode bitmap data into rgb components */
/* we need to know what the row so we can */
@ -764,10 +757,10 @@ gdk_pixbuf__pnm_image_load (FILE *f, GError **error)
context.output_row = 0;
context.output_col = 0;
context.rowstride = context.width * 3;
context.pixels = g_try_malloc (context.height * context.width * 3);
context.pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8,
context.width, context.height);
if (!context.pixels) {
if (!context.pixbuf) {
/* Failed to allocate memory */
g_set_error (error,
GDK_PIXBUF_ERROR,
@ -775,6 +768,9 @@ gdk_pixbuf__pnm_image_load (FILE *f, GError **error)
_("Can't allocate memory for loading PNM image"));
return NULL;
}
context.rowstride = context.pixbuf->rowstride;
context.pixels = context.pixbuf->pixels;
}
/* if we got here we're reading image data */
@ -797,10 +793,7 @@ gdk_pixbuf__pnm_image_load (FILE *f, GError **error)
break;
}
return gdk_pixbuf_new_from_data (context.pixels, GDK_COLORSPACE_RGB, FALSE, 8,
context.width, context.height,
context.width * 3, free_buffer, NULL);
return context.pixbuf;
}
/*

87
gdk-pixbuf/io-tga.c
View File

@ -242,6 +242,37 @@ static void free_buffer(guchar *pixels, gpointer data)
g_free(pixels);
}
static GdkPixbuf *get_contiguous_pixbuf (guint width,
guint height,
gboolean has_alpha)
{
guchar *pixels;
guint channels, rowstride, bytes;
if (has_alpha)
channels = 4;
else
channels = 3;
rowstride = width * channels;
if (rowstride / channels != width)
return NULL;
bytes = height * rowstride;
if (bytes / rowstride != height)
return NULL;
pixels = g_try_malloc (bytes);
if (!pixels)
return NULL;
return gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, has_alpha, 8,
width, height, rowstride, free_buffer, NULL);
}
static gboolean fread_check(gpointer dest,
size_t size, size_t count,
FILE *f, GError **err)
@ -268,7 +299,6 @@ static gboolean fill_in_context(TGAContext *ctx, GError **err)
{
gboolean alpha;
guint w, h;
guchar *pixels;
g_return_val_if_fail(ctx != NULL, FALSE);
@ -288,23 +318,14 @@ static gboolean fill_in_context(TGAContext *ctx, GError **err)
w = LE16(ctx->hdr->width);
h = LE16(ctx->hdr->height);
pixels = g_try_malloc (w * h * (alpha ? 4 : 3));
if (!pixels) {
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Insufficient memory to load TGA image"));
return FALSE;
}
ctx->pbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, alpha, 8,
w, h, w * (alpha ? 4 : 3),
free_buffer, NULL);
ctx->pbuf = get_contiguous_pixbuf (w, h, alpha);
if (!ctx->pbuf) {
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Can't allocate new pixbuf"));
return FALSE;
}
ctx->pbuf_bytes = ctx->pbuf->rowstride * ctx->pbuf->height;
ctx->pptr = ctx->pbuf->pixels;
@ -1000,7 +1021,6 @@ static GdkPixbuf *get_image_pseudocolor(FILE *f, TGAHeader *hdr,
guchar *p, color, tag;
glong n, image_offset;
guint count, w, h;
guchar *pixels;
gboolean alpha;
image_offset = sizeof(TGAHeader) + hdr->infolen;
@ -1023,17 +1043,8 @@ static GdkPixbuf *get_image_pseudocolor(FILE *f, TGAHeader *hdr,
alpha = (hdr->cmap_bpp == 32);
pixels = g_try_malloc (w * h * (alpha ? 4 : 3));
pbuf = get_contiguous_pixbuf (w, h, alpha);
if (!pixels) {
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Insufficient memory to load TGA image"));
return FALSE;
}
pbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, alpha, 8,
w, h, w * (alpha ? 4 : 3),
free_buffer, NULL);
if (!pbuf) {
g_set_error(err, GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
@ -1120,7 +1131,6 @@ static GdkPixbuf *get_image_truecolor(FILE *f, TGAHeader *hdr,
glong n, image_offset;
guint32 pixel;
guint count, w, h;
guchar *pixels;
gboolean alpha;
image_offset = sizeof(TGAHeader) + hdr->infolen;
@ -1135,17 +1145,7 @@ static GdkPixbuf *get_image_truecolor(FILE *f, TGAHeader *hdr,
alpha = (hdr->bpp == 32);
pixels = g_try_malloc (w * h * (alpha ? 4 : 3));
if (!pixels) {
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Insufficient memory to load TGA image"));
return FALSE;
}
pbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, alpha, 8,
w, h, w * (alpha ? 4 : 3),
free_buffer, NULL);
pbuf = get_contiguous_pixbuf (w, h, alpha);
if (!pbuf) {
g_set_error(err, GDK_PIXBUF_ERROR,
@ -1153,8 +1153,6 @@ static GdkPixbuf *get_image_truecolor(FILE *f, TGAHeader *hdr,
_("Can't allocate pixbuf"));
return NULL;
}
pbuf->destroy_fn = free_buffer;
pbuf->destroy_fn_data = NULL;
p = pbuf->pixels;
if (rle) {
@ -1203,7 +1201,6 @@ static GdkPixbuf *get_image_grayscale(FILE *f, TGAHeader *hdr,
glong n, image_offset;
guchar *p, color[2], tag;
guint count, w, h;
guchar *pixels;
gboolean alpha;
image_offset = sizeof(TGAHeader) + hdr->infolen;
@ -1218,26 +1215,14 @@ static GdkPixbuf *get_image_grayscale(FILE *f, TGAHeader *hdr,
alpha = (hdr->bpp == 16);
pixels = g_try_malloc (w * h * (alpha ? 4 : 3));
if (!pixels) {
g_set_error(err, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Insufficient memory to load TGA image"));
return FALSE;
}
pbuf = get_contiguous_pixbuf (w, h, alpha);
pbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, alpha, 8,
w, h, w * (alpha ? 4 : 3),
free_buffer, NULL);
if (!pbuf) {
g_set_error(err, GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
_("Can't allocate pixbuf"));
return NULL;
}
pbuf->destroy_fn = free_buffer;
pbuf->destroy_fn_data = NULL;
p = pbuf->pixels;
if (rle) {

23
gdk-pixbuf/io-xpm.c
View File

@ -1203,13 +1203,6 @@ mem_buffer (enum buf_op op, gpointer handle)
return NULL;
}
/* Destroy notification function for the pixbuf */
static void
free_buffer (guchar *pixels, gpointer data)
{
g_free (pixels);
}
/* This function does all the work. */
static GdkPixbuf *
pixbuf_create_from_xpm (const gchar * (*get_buf) (enum buf_op op, gpointer handle), gpointer handle,
@ -1223,7 +1216,8 @@ pixbuf_create_from_xpm (const gchar * (*get_buf) (enum buf_op op, gpointer handl
gchar pixel_str[32];
GHashTable *color_hash;
XPMColor *colors, *color, *fallbackcolor;
guchar *pixels, *pixtmp;
guchar *pixtmp;
GdkPixbuf *pixbuf;
fallbackcolor = NULL;
@ -1314,12 +1308,9 @@ pixbuf_create_from_xpm (const gchar * (*get_buf) (enum buf_op op, gpointer handl
fallbackcolor = color;
}
if (is_trans)
pixels = g_try_malloc (w * h * 4);
else
pixels = g_try_malloc (w * h * 3);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, is_trans, 8, w, h);
if (!pixels) {
if (!pixbuf) {
g_set_error (error,
GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
@ -1331,7 +1322,7 @@ pixbuf_create_from_xpm (const gchar * (*get_buf) (enum buf_op op, gpointer handl
}
wbytes = w * cpp;
pixtmp = pixels;
pixtmp = pixbuf->pixels;
for (ycnt = 0; ycnt < h; ycnt++) {
buffer = (*get_buf) (op_body, handle);
@ -1364,9 +1355,7 @@ pixbuf_create_from_xpm (const gchar * (*get_buf) (enum buf_op op, gpointer handl
g_free (colors);
g_free (name_buf);
return gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, is_trans, 8,
w, h, is_trans ? (w * 4) : (w * 3),
free_buffer, NULL);
return pixbuf;
}
/* Shared library entry point for file loading */