/*!
* pixResizeImageData()
*
* Input: pixd (gets new uninitialized buffer for image data)
* pixs (determines the size of the buffer; not changed)
* Return: 0 if OK, 1 on error
*
* Notes:
* (1) This removes any existing image data from pixd and
* allocates an uninitialized buffer that will hold the
* amount of image data that is in pixs.
*/
LEPTONICA_EXPORT l_int32
pixResizeImageData(PIX *pixd,
PIX *pixs)
{
l_int32 w, h, d, wpl, bytes;
l_uint32 *data;
PROCNAME("pixResizeImageData");
if (!pixs)
return ERROR_INT("pixs not defined", procName, 1);
if (!pixd)
return ERROR_INT("pixd not defined", procName, 1);
if (pixSizesEqual(pixs, pixd)) /* nothing to do */
return 0;
pixGetDimensions(pixs, &w, &h, &d);
wpl = pixGetWpl(pixs);
pixSetWidth(pixd, w);
pixSetHeight(pixd, h);
pixSetDepth(pixd, d);
pixSetWpl(pixd, wpl);
bytes = 4 * wpl * h;
if ((data = pixGetData(pixd)) != NULL) {
pix_free(data);
pixd->data = NULL;
}
if ((data = (l_uint32 *)pix_malloc(bytes)) == NULL)
return ERROR_INT("pix_malloc fail for data", procName, 1);
pixSetData(pixd, data);
return 0;
}
/*!
* pixFreeData()
*
* Notes:
* (1) This frees the data and sets the pix data ptr to null.
* It should be used before pixSetData() in the situation where
* you want to free any existing data before doing
* a subsequent assignment with pixSetData().
*/
l_int32
pixFreeData(PIX *pix)
{
l_uint32 *data;
PROCNAME("pixFreeData");
if (!pix)
return ERROR_INT("pix not defined", procName, 1);
if ((data = pixGetData(pix)) != NULL) {
pix_free(data);
pix->data = NULL;
}
return 0;
}
/*!
* pixFree()
*
* Input: pix
* Return: void
*
* Notes:
* (1) Decrements the ref count and, if 0, destroys the pix.
*/
static void
pixFree(PIX *pix)
{
l_uint32 *data;
char *text;
if (!pix) return;
pixChangeRefcount(pix, -1);
if (pixGetRefcount(pix) <= 0) {
if ((data = pixGetData(pix)) != NULL)
pix_free(data);
if ((text = pixGetText(pix)) != NULL)
FREE(text);
pixDestroyColormap(pix);
FREE(pix);
}
return;
}
