55d342c788
TJPARAM_MAXPIXELS was previously hidden and used only for fuzz testing, but it is potentially useful for calling applications as well, particularly if they want to guard against excessive memory consumption by the tj3LoadImage*() functions. The parameter has also been extended to decompression and lossless transformation functions/methods, mainly as a convenience. (It was already possible for calling applications to impose their own JPEG image size limits by reading the JPEG header prior to decompressing or transforming the image.)
538 lines
18 KiB
C
538 lines
18 KiB
C
/*
|
|
* Copyright (C)2009-2023 D. R. Commander. All Rights Reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* - Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
* - Neither the name of the libjpeg-turbo Project nor the names of its
|
|
* contributors may be used to endorse or promote products derived from this
|
|
* software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/* TurboJPEG API functions that must be compiled for multiple data
|
|
precisions */
|
|
|
|
#if BITS_IN_JSAMPLE == 8
|
|
#define _JSAMPLE JSAMPLE
|
|
#define _JSAMPROW JSAMPROW
|
|
#define _buffer buffer
|
|
#define _jinit_read_ppm jinit_read_ppm
|
|
#define _jinit_write_ppm jinit_write_ppm
|
|
#define _jpeg_crop_scanline jpeg_crop_scanline
|
|
#define _jpeg_read_scanlines jpeg_read_scanlines
|
|
#define _jpeg_skip_scanlines jpeg_skip_scanlines
|
|
#define _jpeg_write_scanlines jpeg_write_scanlines
|
|
#elif BITS_IN_JSAMPLE == 12
|
|
#define _JSAMPLE J12SAMPLE
|
|
#define _JSAMPROW J12SAMPROW
|
|
#define _buffer buffer12
|
|
#define _jinit_read_ppm j12init_read_ppm
|
|
#define _jinit_write_ppm j12init_write_ppm
|
|
#define _jpeg_crop_scanline jpeg12_crop_scanline
|
|
#define _jpeg_read_scanlines jpeg12_read_scanlines
|
|
#define _jpeg_skip_scanlines jpeg12_skip_scanlines
|
|
#define _jpeg_write_scanlines jpeg12_write_scanlines
|
|
#elif BITS_IN_JSAMPLE == 16
|
|
#define _JSAMPLE J16SAMPLE
|
|
#define _JSAMPROW J16SAMPROW
|
|
#define _buffer buffer16
|
|
#define _jinit_read_ppm j16init_read_ppm
|
|
#define _jinit_write_ppm j16init_write_ppm
|
|
#define _jpeg_read_scanlines jpeg16_read_scanlines
|
|
#define _jpeg_write_scanlines jpeg16_write_scanlines
|
|
#endif
|
|
|
|
#define _GET_NAME(name, suffix) name##suffix
|
|
#define GET_NAME(name, suffix) _GET_NAME(name, suffix)
|
|
#define _GET_STRING(name, suffix) #name #suffix
|
|
#define GET_STRING(name, suffix) _GET_STRING(name, suffix)
|
|
|
|
|
|
/******************************** Compressor *********************************/
|
|
|
|
/* TurboJPEG 3+ */
|
|
DLLEXPORT int GET_NAME(tj3Compress, BITS_IN_JSAMPLE)
|
|
(tjhandle handle, const _JSAMPLE *srcBuf, int width, int pitch, int height,
|
|
int pixelFormat, unsigned char **jpegBuf, size_t *jpegSize)
|
|
{
|
|
static const char FUNCTION_NAME[] = GET_STRING(tj3Compress, BITS_IN_JSAMPLE);
|
|
int i, retval = 0;
|
|
boolean alloc = TRUE;
|
|
_JSAMPROW *row_pointer = NULL;
|
|
|
|
GET_CINSTANCE(handle)
|
|
if ((this->init & COMPRESS) == 0)
|
|
THROW("Instance has not been initialized for compression");
|
|
|
|
if (srcBuf == NULL || width <= 0 || pitch < 0 || height <= 0 ||
|
|
pixelFormat < 0 || pixelFormat >= TJ_NUMPF || jpegBuf == NULL ||
|
|
jpegSize == NULL)
|
|
THROW("Invalid argument");
|
|
|
|
if (!this->lossless && this->quality == -1)
|
|
THROW("TJPARAM_QUALITY must be specified");
|
|
if (!this->lossless && this->subsamp == TJSAMP_UNKNOWN)
|
|
THROW("TJPARAM_SUBSAMP must be specified");
|
|
|
|
if (pitch == 0) pitch = width * tjPixelSize[pixelFormat];
|
|
|
|
if ((row_pointer = (_JSAMPROW *)malloc(sizeof(_JSAMPROW) * height)) == NULL)
|
|
THROW("Memory allocation failure");
|
|
|
|
if (setjmp(this->jerr.setjmp_buffer)) {
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval = -1; goto bailout;
|
|
}
|
|
|
|
cinfo->image_width = width;
|
|
cinfo->image_height = height;
|
|
cinfo->data_precision = BITS_IN_JSAMPLE;
|
|
|
|
setCompDefaults(this, pixelFormat);
|
|
if (this->noRealloc) {
|
|
alloc = FALSE;
|
|
*jpegSize = tj3JPEGBufSize(width, height, this->subsamp);
|
|
}
|
|
jpeg_mem_dest_tj(cinfo, jpegBuf, jpegSize, alloc);
|
|
|
|
jpeg_start_compress(cinfo, TRUE);
|
|
for (i = 0; i < height; i++) {
|
|
if (this->bottomUp)
|
|
row_pointer[i] = (_JSAMPROW)&srcBuf[(height - i - 1) * (size_t)pitch];
|
|
else
|
|
row_pointer[i] = (_JSAMPROW)&srcBuf[i * (size_t)pitch];
|
|
}
|
|
while (cinfo->next_scanline < cinfo->image_height)
|
|
_jpeg_write_scanlines(cinfo, &row_pointer[cinfo->next_scanline],
|
|
cinfo->image_height - cinfo->next_scanline);
|
|
jpeg_finish_compress(cinfo);
|
|
|
|
bailout:
|
|
if (cinfo->global_state > CSTATE_START && alloc)
|
|
(*cinfo->dest->term_destination) (cinfo);
|
|
if (cinfo->global_state > CSTATE_START || retval == -1)
|
|
jpeg_abort_compress(cinfo);
|
|
free(row_pointer);
|
|
if (this->jerr.warning) retval = -1;
|
|
return retval;
|
|
}
|
|
|
|
|
|
/******************************* Decompressor ********************************/
|
|
|
|
/* TurboJPEG 3+ */
|
|
DLLEXPORT int GET_NAME(tj3Decompress, BITS_IN_JSAMPLE)
|
|
(tjhandle handle, const unsigned char *jpegBuf, size_t jpegSize,
|
|
_JSAMPLE *dstBuf, int pitch, int pixelFormat)
|
|
{
|
|
static const char FUNCTION_NAME[] =
|
|
GET_STRING(tj3Decompress, BITS_IN_JSAMPLE);
|
|
_JSAMPROW *row_pointer = NULL;
|
|
int croppedHeight, i, retval = 0;
|
|
#if BITS_IN_JSAMPLE != 16
|
|
int scaledWidth;
|
|
#endif
|
|
struct my_progress_mgr progress;
|
|
|
|
GET_DINSTANCE(handle);
|
|
if ((this->init & DECOMPRESS) == 0)
|
|
THROW("Instance has not been initialized for decompression");
|
|
|
|
if (jpegBuf == NULL || jpegSize <= 0 || dstBuf == NULL || pitch < 0 ||
|
|
pixelFormat < 0 || pixelFormat >= TJ_NUMPF)
|
|
THROW("Invalid argument");
|
|
|
|
if (this->scanLimit) {
|
|
memset(&progress, 0, sizeof(struct my_progress_mgr));
|
|
progress.pub.progress_monitor = my_progress_monitor;
|
|
progress.this = this;
|
|
dinfo->progress = &progress.pub;
|
|
} else
|
|
dinfo->progress = NULL;
|
|
|
|
dinfo->mem->max_memory_to_use = (long)this->maxMemory * 1048576L;
|
|
|
|
if (setjmp(this->jerr.setjmp_buffer)) {
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval = -1; goto bailout;
|
|
}
|
|
|
|
if (dinfo->global_state <= DSTATE_INHEADER) {
|
|
jpeg_mem_src_tj(dinfo, jpegBuf, jpegSize);
|
|
jpeg_read_header(dinfo, TRUE);
|
|
}
|
|
setDecompParameters(this);
|
|
if (this->maxPixels &&
|
|
(unsigned long long)this->jpegWidth * this->jpegHeight > this->maxPixels)
|
|
THROW("Image is too large");
|
|
this->dinfo.out_color_space = pf2cs[pixelFormat];
|
|
#if BITS_IN_JSAMPLE != 16
|
|
scaledWidth = TJSCALED(dinfo->image_width, this->scalingFactor);
|
|
#endif
|
|
dinfo->do_fancy_upsampling = !this->fastUpsample;
|
|
this->dinfo.dct_method = this->fastDCT ? JDCT_FASTEST : JDCT_ISLOW;
|
|
|
|
dinfo->scale_num = this->scalingFactor.num;
|
|
dinfo->scale_denom = this->scalingFactor.denom;
|
|
|
|
jpeg_start_decompress(dinfo);
|
|
|
|
#if BITS_IN_JSAMPLE != 16
|
|
if (this->croppingRegion.x != 0 ||
|
|
(this->croppingRegion.w != 0 && this->croppingRegion.w != scaledWidth)) {
|
|
JDIMENSION crop_x = this->croppingRegion.x;
|
|
JDIMENSION crop_w = this->croppingRegion.w;
|
|
|
|
_jpeg_crop_scanline(dinfo, &crop_x, &crop_w);
|
|
if ((int)crop_x != this->croppingRegion.x)
|
|
THROWI("Unexplained mismatch between specified (%d) and\n"
|
|
"actual (%d) cropping region left boundary",
|
|
this->croppingRegion.x, (int)crop_x);
|
|
if ((int)crop_w != this->croppingRegion.w)
|
|
THROWI("Unexplained mismatch between specified (%d) and\n"
|
|
"actual (%d) cropping region width",
|
|
this->croppingRegion.w, (int)crop_w);
|
|
}
|
|
#endif
|
|
|
|
if (pitch == 0) pitch = dinfo->output_width * tjPixelSize[pixelFormat];
|
|
|
|
croppedHeight = dinfo->output_height;
|
|
#if BITS_IN_JSAMPLE != 16
|
|
if (this->croppingRegion.y != 0 || this->croppingRegion.h != 0)
|
|
croppedHeight = this->croppingRegion.h;
|
|
#endif
|
|
if ((row_pointer =
|
|
(_JSAMPROW *)malloc(sizeof(_JSAMPROW) * croppedHeight)) == NULL)
|
|
THROW("Memory allocation failure");
|
|
if (setjmp(this->jerr.setjmp_buffer)) {
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval = -1; goto bailout;
|
|
}
|
|
for (i = 0; i < (int)croppedHeight; i++) {
|
|
if (this->bottomUp)
|
|
row_pointer[i] = &dstBuf[(croppedHeight - i - 1) * (size_t)pitch];
|
|
else
|
|
row_pointer[i] = &dstBuf[i * (size_t)pitch];
|
|
}
|
|
|
|
#if BITS_IN_JSAMPLE != 16
|
|
if (this->croppingRegion.y != 0 || this->croppingRegion.h != 0) {
|
|
if (this->croppingRegion.y != 0) {
|
|
JDIMENSION lines = _jpeg_skip_scanlines(dinfo, this->croppingRegion.y);
|
|
|
|
if ((int)lines != this->croppingRegion.y)
|
|
THROWI("Unexplained mismatch between specified (%d) and\n"
|
|
"actual (%d) cropping region upper boundary",
|
|
this->croppingRegion.y, (int)lines);
|
|
}
|
|
while ((int)dinfo->output_scanline <
|
|
this->croppingRegion.y + this->croppingRegion.h)
|
|
_jpeg_read_scanlines(dinfo, &row_pointer[dinfo->output_scanline -
|
|
this->croppingRegion.y],
|
|
this->croppingRegion.y + this->croppingRegion.h -
|
|
dinfo->output_scanline);
|
|
if (this->croppingRegion.y + this->croppingRegion.h !=
|
|
(int)dinfo->output_height) {
|
|
JDIMENSION lines = _jpeg_skip_scanlines(dinfo, dinfo->output_height -
|
|
this->croppingRegion.y -
|
|
this->croppingRegion.h);
|
|
|
|
if (lines != dinfo->output_height - this->croppingRegion.y -
|
|
this->croppingRegion.h)
|
|
THROWI("Unexplained mismatch between specified (%d) and\n"
|
|
"actual (%d) cropping region lower boundary",
|
|
this->croppingRegion.y + this->croppingRegion.h,
|
|
(int)(dinfo->output_height - lines));
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
while (dinfo->output_scanline < dinfo->output_height)
|
|
_jpeg_read_scanlines(dinfo, &row_pointer[dinfo->output_scanline],
|
|
dinfo->output_height - dinfo->output_scanline);
|
|
}
|
|
jpeg_finish_decompress(dinfo);
|
|
|
|
bailout:
|
|
if (dinfo->global_state > DSTATE_START) jpeg_abort_decompress(dinfo);
|
|
free(row_pointer);
|
|
if (this->jerr.warning) retval = -1;
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*************************** Packed-Pixel Image I/O **************************/
|
|
|
|
/* TurboJPEG 3+ */
|
|
DLLEXPORT _JSAMPLE *GET_NAME(tj3LoadImage, BITS_IN_JSAMPLE)
|
|
(tjhandle handle, const char *filename, int *width, int align, int *height,
|
|
int *pixelFormat)
|
|
{
|
|
static const char FUNCTION_NAME[] =
|
|
GET_STRING(tj3LoadImage, BITS_IN_JSAMPLE);
|
|
|
|
#if BITS_IN_JSAMPLE != 16 || defined(C_LOSSLESS_SUPPORTED)
|
|
|
|
int retval = 0, tempc;
|
|
size_t pitch;
|
|
tjhandle handle2 = NULL;
|
|
tjinstance *this2;
|
|
j_compress_ptr cinfo = NULL;
|
|
cjpeg_source_ptr src;
|
|
_JSAMPLE *dstBuf = NULL;
|
|
FILE *file = NULL;
|
|
boolean invert;
|
|
|
|
GET_TJINSTANCE(handle, NULL)
|
|
|
|
if (!filename || !width || align < 1 || !height || !pixelFormat ||
|
|
*pixelFormat < TJPF_UNKNOWN || *pixelFormat >= TJ_NUMPF)
|
|
THROW("Invalid argument");
|
|
if ((align & (align - 1)) != 0)
|
|
THROW("Alignment must be a power of 2");
|
|
|
|
/* The instance handle passed to this function is used only for parameter
|
|
retrieval. Create a new temporary instance to avoid interfering with the
|
|
libjpeg state of the primary instance. */
|
|
if ((handle2 = tj3Init(TJINIT_COMPRESS)) == NULL) return NULL;
|
|
this2 = (tjinstance *)handle2;
|
|
cinfo = &this2->cinfo;
|
|
|
|
#ifdef _MSC_VER
|
|
if (fopen_s(&file, filename, "rb") || file == NULL)
|
|
#else
|
|
if ((file = fopen(filename, "rb")) == NULL)
|
|
#endif
|
|
THROW_UNIX("Cannot open input file");
|
|
|
|
if ((tempc = getc(file)) < 0 || ungetc(tempc, file) == EOF)
|
|
THROW_UNIX("Could not read input file")
|
|
else if (tempc == EOF)
|
|
THROW("Input file contains no data");
|
|
|
|
if (setjmp(this2->jerr.setjmp_buffer)) {
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval = -1; goto bailout;
|
|
}
|
|
|
|
cinfo->data_precision = BITS_IN_JSAMPLE;
|
|
if (*pixelFormat == TJPF_UNKNOWN) cinfo->in_color_space = JCS_UNKNOWN;
|
|
else cinfo->in_color_space = pf2cs[*pixelFormat];
|
|
if (tempc == 'B') {
|
|
if ((src = jinit_read_bmp(cinfo, FALSE)) == NULL)
|
|
THROW("Could not initialize bitmap loader");
|
|
invert = !this->bottomUp;
|
|
} else if (tempc == 'P') {
|
|
if ((src = _jinit_read_ppm(cinfo)) == NULL)
|
|
THROW("Could not initialize PPM loader");
|
|
invert = this->bottomUp;
|
|
} else
|
|
THROW("Unsupported file type");
|
|
|
|
cinfo->mem->max_memory_to_use = (long)this->maxMemory * 1048576L;
|
|
|
|
src->input_file = file;
|
|
/* Refuse to load images larger than the specified size. */
|
|
src->max_pixels = this->maxPixels;
|
|
(*src->start_input) (cinfo, src);
|
|
if (tempc == 'B') {
|
|
if (cinfo->X_density && cinfo->Y_density) {
|
|
this->xDensity = cinfo->X_density;
|
|
this->yDensity = cinfo->Y_density;
|
|
this->densityUnits = cinfo->density_unit;
|
|
}
|
|
}
|
|
(*cinfo->mem->realize_virt_arrays) ((j_common_ptr)cinfo);
|
|
|
|
*width = cinfo->image_width; *height = cinfo->image_height;
|
|
*pixelFormat = cs2pf[cinfo->in_color_space];
|
|
|
|
pitch = PAD((*width) * tjPixelSize[*pixelFormat], align);
|
|
if ((unsigned long long)pitch * (unsigned long long)(*height) >
|
|
(unsigned long long)((size_t)-1) ||
|
|
(dstBuf = (_JSAMPLE *)malloc(pitch * (*height) *
|
|
sizeof(_JSAMPLE))) == NULL)
|
|
THROW("Memory allocation failure");
|
|
|
|
if (setjmp(this2->jerr.setjmp_buffer)) {
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval = -1; goto bailout;
|
|
}
|
|
|
|
while (cinfo->next_scanline < cinfo->image_height) {
|
|
int i, nlines = (*src->get_pixel_rows) (cinfo, src);
|
|
|
|
for (i = 0; i < nlines; i++) {
|
|
_JSAMPLE *dstptr;
|
|
int row;
|
|
|
|
row = cinfo->next_scanline + i;
|
|
if (invert) dstptr = &dstBuf[((*height) - row - 1) * pitch];
|
|
else dstptr = &dstBuf[row * pitch];
|
|
memcpy(dstptr, src->_buffer[i],
|
|
(*width) * tjPixelSize[*pixelFormat] * sizeof(_JSAMPLE));
|
|
}
|
|
cinfo->next_scanline += nlines;
|
|
}
|
|
|
|
(*src->finish_input) (cinfo, src);
|
|
|
|
bailout:
|
|
tj3Destroy(handle2);
|
|
if (file) fclose(file);
|
|
if (retval < 0) { free(dstBuf); dstBuf = NULL; }
|
|
return dstBuf;
|
|
|
|
#else /* BITS_IN_JSAMPLE != 16 || defined(C_LOSSLESS_SUPPORTED) */
|
|
|
|
static const char ERROR_MSG[] =
|
|
"16-bit data precision requires lossless JPEG,\n"
|
|
"which was disabled at build time.";
|
|
_JSAMPLE *retval = NULL;
|
|
|
|
GET_TJINSTANCE(handle, NULL)
|
|
SNPRINTF(this->errStr, JMSG_LENGTH_MAX, "%s(): %s", FUNCTION_NAME,
|
|
ERROR_MSG);
|
|
this->isInstanceError = TRUE; THROWG(ERROR_MSG, NULL)
|
|
|
|
bailout:
|
|
return retval;
|
|
|
|
#endif
|
|
}
|
|
|
|
|
|
/* TurboJPEG 3+ */
|
|
DLLEXPORT int GET_NAME(tj3SaveImage, BITS_IN_JSAMPLE)
|
|
(tjhandle handle, const char *filename, const _JSAMPLE *buffer, int width,
|
|
int pitch, int height, int pixelFormat)
|
|
{
|
|
static const char FUNCTION_NAME[] =
|
|
GET_STRING(tj3SaveImage, BITS_IN_JSAMPLE);
|
|
int retval = 0;
|
|
|
|
#if BITS_IN_JSAMPLE != 16 || defined(D_LOSSLESS_SUPPORTED)
|
|
|
|
tjhandle handle2 = NULL;
|
|
tjinstance *this2;
|
|
j_decompress_ptr dinfo = NULL;
|
|
djpeg_dest_ptr dst;
|
|
FILE *file = NULL;
|
|
char *ptr = NULL;
|
|
boolean invert;
|
|
|
|
GET_TJINSTANCE(handle, -1)
|
|
|
|
if (!filename || !buffer || width < 1 || pitch < 0 || height < 1 ||
|
|
pixelFormat < 0 || pixelFormat >= TJ_NUMPF)
|
|
THROW("Invalid argument");
|
|
|
|
/* The instance handle passed to this function is used only for parameter
|
|
retrieval. Create a new temporary instance to avoid interfering with the
|
|
libjpeg state of the primary instance. */
|
|
if ((handle2 = tj3Init(TJINIT_DECOMPRESS)) == NULL)
|
|
return -1;
|
|
this2 = (tjinstance *)handle2;
|
|
dinfo = &this2->dinfo;
|
|
|
|
#ifdef _MSC_VER
|
|
if (fopen_s(&file, filename, "wb") || file == NULL)
|
|
#else
|
|
if ((file = fopen(filename, "wb")) == NULL)
|
|
#endif
|
|
THROW_UNIX("Cannot open output file");
|
|
|
|
if (setjmp(this2->jerr.setjmp_buffer)) {
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval = -1; goto bailout;
|
|
}
|
|
|
|
this2->dinfo.out_color_space = pf2cs[pixelFormat];
|
|
dinfo->image_width = width; dinfo->image_height = height;
|
|
dinfo->global_state = DSTATE_READY;
|
|
dinfo->scale_num = dinfo->scale_denom = 1;
|
|
dinfo->data_precision = BITS_IN_JSAMPLE;
|
|
|
|
ptr = strrchr(filename, '.');
|
|
if (ptr && !strcasecmp(ptr, ".bmp")) {
|
|
if ((dst = jinit_write_bmp(dinfo, FALSE, FALSE)) == NULL)
|
|
THROW("Could not initialize bitmap writer");
|
|
invert = !this->bottomUp;
|
|
dinfo->X_density = (UINT16)this->xDensity;
|
|
dinfo->Y_density = (UINT16)this->yDensity;
|
|
dinfo->density_unit = (UINT8)this->densityUnits;
|
|
} else {
|
|
if ((dst = _jinit_write_ppm(dinfo)) == NULL)
|
|
THROW("Could not initialize PPM writer");
|
|
invert = this->bottomUp;
|
|
}
|
|
|
|
dinfo->mem->max_memory_to_use = (long)this->maxMemory * 1048576L;
|
|
|
|
dst->output_file = file;
|
|
(*dst->start_output) (dinfo, dst);
|
|
(*dinfo->mem->realize_virt_arrays) ((j_common_ptr)dinfo);
|
|
|
|
if (pitch == 0) pitch = width * tjPixelSize[pixelFormat];
|
|
|
|
while (dinfo->output_scanline < dinfo->output_height) {
|
|
_JSAMPLE *rowptr;
|
|
|
|
if (invert)
|
|
rowptr =
|
|
(_JSAMPLE *)&buffer[(height - dinfo->output_scanline - 1) * pitch];
|
|
else
|
|
rowptr = (_JSAMPLE *)&buffer[dinfo->output_scanline * pitch];
|
|
memcpy(dst->_buffer[0], rowptr,
|
|
width * tjPixelSize[pixelFormat] * sizeof(_JSAMPLE));
|
|
(*dst->put_pixel_rows) (dinfo, dst, 1);
|
|
dinfo->output_scanline++;
|
|
}
|
|
|
|
(*dst->finish_output) (dinfo, dst);
|
|
|
|
bailout:
|
|
tj3Destroy(handle2);
|
|
if (file) fclose(file);
|
|
return retval;
|
|
|
|
#else /* BITS_IN_JSAMPLE != 16 || defined(D_LOSSLESS_SUPPORTED) */
|
|
|
|
GET_TJINSTANCE(handle, -1)
|
|
THROW("16-bit data precision requires lossless JPEG,\n"
|
|
"which was disabled at build time.")
|
|
bailout:
|
|
return retval;
|
|
|
|
#endif
|
|
}
|
|
|
|
|
|
#undef _JSAMPLE
|
|
#undef _JSAMPROW
|
|
#undef _buffer
|
|
#undef _jinit_read_ppm
|
|
#undef _jinit_write_ppm
|
|
#undef _jpeg_crop_scanline
|
|
#undef _jpeg_read_scanlines
|
|
#undef _jpeg_skip_scanlines
|
|
#undef _jpeg_write_scanlines
|