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Patch from Kristian Hogsberg Kristensen <hogsberg@daimi.au.dk> to avoid

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1999-10-22  Federico Mena Quintero  <federico@redhat.com>

	* src/io-png.c (image_load): Patch from Kristian Hogsberg
	Kristensen <hogsberg@daimi.au.dk> to avoid allocating extra row
	buffers; the rows can be read in directly into the main pixel
	buffer.
This commit is contained in:
Federico Mena Quintero 1999-10-22 15:18:03 +00:00 committed by Arturo Espinosa
parent 04823f40c4
commit 9de0d0c9c3
2 changed files with 14 additions and 45 deletions
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7
gdk-pixbuf/ChangeLog
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@ -1,3 +1,10 @@
1999-10-22 Federico Mena Quintero <federico@redhat.com>
* src/io-png.c (image_load): Patch from Kristian Hogsberg
Kristensen <hogsberg@daimi.au.dk> to avoid allocating extra row
buffers; the rows can be read in directly into the main pixel
buffer.
1999-10-20 Federico Mena Quintero <federico@redhat.com>
* src/gdk-pixbuf-io.c (image_handler_load): Free path.

52
gdk-pixbuf/io-png.c
View File

@ -43,9 +43,9 @@ image_load (FILE *f)
png_structp png_ptr;
png_infop info_ptr, end_info;
gint i, depth, ctype, inttype, passes, bpp;
png_uint_32 w, h, x, y;
png_uint_32 w, h;
png_bytepp rows;
guchar *pixels, *temp, *rowdata;
guchar *pixels;
png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
@ -114,57 +114,19 @@ image_load (FILE *f)
bpp = 3;
pixels = malloc (w * h * bpp);
rows = malloc (h * sizeof (png_bytep));
if (!pixels || !rows) {
if (pixels)
free (pixels);
if (rows)
free (rows);
if (!pixels) {
png_destroy_read_struct (&png_ptr, &info_ptr, &end_info);
return NULL;
}
/* Icky code, but it has to be done... */
for (i = 0; i < h; i++) {
if ((rows[i] = malloc (w * bpp)) == NULL) {
int n;
rows = g_new (png_bytep, h);
for (n = 0; n < i; n++)
free (rows[i]);
for (i = 0; i < h; i++)
rows[i] = pixels + i * w * bpp;
free (rows);
free (pixels);
png_destroy_read_struct (&png_ptr, &info_ptr, &end_info);
return NULL;
}
}
/* And we FINALLY get here... */
png_read_image (png_ptr, rows);
png_destroy_read_struct (&png_ptr, &info_ptr, &end_info);
/* Now stuff the bytes into pixels & free rows[y] */
temp = pixels;
for (y = 0; y < h; y++) {
rowdata = rows[y];
for (x = 0; x < w; x++) {
temp[0] = rowdata[(x * bpp)];
temp[1] = rowdata[(x * bpp) + 1];
temp[2] = rowdata[(x * bpp) + 2];
if (bpp == 4)
temp[3] = rowdata[(x * bpp) + 3];
temp += bpp;
}
free (rows[y]);
}
free (rows);
g_free (rows);
if (ctype & PNG_COLOR_MASK_ALPHA)
return gdk_pixbuf_new_from_data (pixels, ART_PIX_RGB, TRUE,