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Issue #4210 - GIMP reports errors on scanning ... 

... since GEGLification of the twain plug-in (2.10.14 and later
versions)

In the data-transfer functions, allocate a temporary buffer for the
converted data on each call using the current chunk size, instead
of reusing the buffer allocated on the first chunk.  This allows
for different chunks sizes across calls.
This commit is contained in:
Ell 2020-06-03 16:44:44 +03:00
parent 6dcac81634
commit 9a1d43c978
1 changed files with 20 additions and 9 deletions
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29
plug-ins/twain/twain.c
View File

@ -109,7 +109,6 @@
/* Global variables */
pTW_SESSION twSession = NULL;
static char *destBuf = NULL;
#ifdef _DEBUG
static int twain_run_mode = RUN_STANDARD;
#endif
@ -651,13 +650,13 @@ bitTransferCallback (pTW_IMAGEINFO imageInfo,
{
int row, col, offset;
char *srcBuf;
char *destBuf;
int rows = imageMemXfer->Rows;
int cols = imageMemXfer->Columns;
pClientDataStruct theClientData = (pClientDataStruct) clientData;
/* Allocate a buffer as necessary */
if (! destBuf)
destBuf = g_new (char, rows * cols);
destBuf = gegl_scratch_new (char, rows * cols);
/* Unpack the image data from bits into bytes */
srcBuf = (char *) imageMemXfer->Memory.TheMem;
@ -678,6 +677,9 @@ bitTransferCallback (pTW_IMAGEINFO imageInfo,
theClientData->format, destBuf,
GEGL_AUTO_ROWSTRIDE);
/* Free the buffer */
gegl_scratch_free (destBuf);
/* Update the user on our progress */
theClientData->completedPixels += (cols * rows);
gimp_progress_update ((double) theClientData->completedPixels /
@ -703,14 +705,14 @@ oneBytePerSampleTransferCallback (pTW_IMAGEINFO imageInfo,
{
int row;
char *srcBuf;
char *destBuf;
int bytesPerPixel = imageInfo->BitsPerPixel / 8;
int rows = imageMemXfer->Rows;
int cols = imageMemXfer->Columns;
pClientDataStruct theClientData = (pClientDataStruct) clientData;
/* Allocate a buffer as necessary */
if (! destBuf)
destBuf = g_new (char, rows * cols * bytesPerPixel);
destBuf = gegl_scratch_new (char, rows * cols * bytesPerPixel);
/* The bytes coming from the source may not be padded in
* a way that GIMP is terribly happy with. It is
@ -736,6 +738,9 @@ oneBytePerSampleTransferCallback (pTW_IMAGEINFO imageInfo,
theClientData->format, destBuf,
GEGL_AUTO_ROWSTRIDE);
/* Free the buffer */
gegl_scratch_free (destBuf);
/* Update the user on our progress */
theClientData->completedPixels += (cols * rows);
gimp_progress_update ((double) theClientData->completedPixels /
@ -758,6 +763,7 @@ twoBytesPerSampleTransferCallback (pTW_IMAGEINFO imageInfo,
{
static float ratio = 0.00390625;
int row, col, sample;
char *destBuf;
char *destByte;
int rows = imageMemXfer->Rows;
int cols = imageMemXfer->Columns;
@ -766,8 +772,7 @@ twoBytesPerSampleTransferCallback (pTW_IMAGEINFO imageInfo,
pClientDataStruct theClientData = (pClientDataStruct) clientData;
/* Allocate a buffer as necessary */
if (! destBuf)
destBuf = g_new (char, rows * cols * imageInfo->SamplesPerPixel);
destBuf = gegl_scratch_new (char, rows * cols * imageInfo->SamplesPerPixel);
/* The bytes coming from the source may not be padded in
* a way that GIMP is terribly happy with. It is
@ -815,6 +820,9 @@ twoBytesPerSampleTransferCallback (pTW_IMAGEINFO imageInfo,
theClientData->format, destBuf,
GEGL_AUTO_ROWSTRIDE);
/* Free the buffer */
gegl_scratch_free (destBuf);
/* Update the user on our progress */
theClientData->completedPixels += (cols * rows);
gimp_progress_update ((double) theClientData->completedPixels /
@ -844,6 +852,7 @@ palettedTransferCallback (pTW_IMAGEINFO imageInfo,
int row, col;
int rows = imageMemXfer->Rows;
int cols = imageMemXfer->Columns;
char *destBuf;
char *destPtr = NULL;
char *srcPtr = NULL;
@ -855,8 +864,7 @@ palettedTransferCallback (pTW_IMAGEINFO imageInfo,
(theClientData->paletteData->PaletteType == TWPA_RGB) ? 3 : 1;
/* Allocate a buffer as necessary */
if (! destBuf)
destBuf = g_new (char, rows * cols * channelsPerEntry);
destBuf = gegl_scratch_new (char, rows * cols * channelsPerEntry);
/* Work through the rows */
destPtr = destBuf;
@ -898,6 +906,9 @@ palettedTransferCallback (pTW_IMAGEINFO imageInfo,
theClientData->format, destBuf,
GEGL_AUTO_ROWSTRIDE);
/* Free the buffer */
gegl_scratch_free (destBuf);
/* Update the user on our progress */
theClientData->completedPixels += (cols * rows);
gimp_progress_update ((double) theClientData->completedPixels /