void*
TIFFOutput::convert_to_cmyk (int npixels, const void* data)
{
std::vector<unsigned char> cmyk (m_outputchans * spec().format.size() * npixels);
if (spec().format == TypeDesc::UINT8) {
rgb_to_cmyk (npixels, (unsigned char *)data, m_spec.nchannels,
(unsigned char *)&cmyk[0], m_outputchans);
} else if (spec().format == TypeDesc::UINT16) {
rgb_to_cmyk (npixels, (unsigned short *)data, m_spec.nchannels,
(unsigned short *)&cmyk[0], m_outputchans);
} else {
ASSERT (0 && "CMYK should be forced to UINT8 or UINT16");
}
m_scratch.swap (cmyk);
return &m_scratch[0];
}
get_32bit_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
/* This version is for reading 32-bit pixels */
{
bmp_source_ptr source = (bmp_source_ptr)sinfo;
JSAMPARRAY image_ptr;
register JSAMPROW inptr, outptr;
register JDIMENSION col;
if (source->use_inversion_array) {
/* Fetch next row from virtual array */
source->source_row--;
image_ptr = (*cinfo->mem->access_virt_sarray)
((j_common_ptr)cinfo, source->whole_image,
source->source_row, (JDIMENSION)1, FALSE);
inptr = image_ptr[0];
} else {
if (!ReadOK(source->pub.input_file, source->iobuffer, source->row_width))
ERREXIT(cinfo, JERR_INPUT_EOF);
inptr = source->iobuffer;
}
/* Transfer data. Note source values are in BGR order
* (even though Microsoft's own documents say the opposite).
*/
outptr = source->pub.buffer[0];
if (cinfo->in_color_space == JCS_EXT_BGRX ||
cinfo->in_color_space == JCS_EXT_BGRA) {
MEMCOPY(outptr, inptr, source->row_width);
} else if (cinfo->in_color_space == JCS_CMYK) {
for (col = cinfo->image_width; col > 0; col--) {
/* can omit GETJSAMPLE() safely */
JSAMPLE b = *inptr++, g = *inptr++, r = *inptr++;
rgb_to_cmyk(r, g, b, outptr, outptr + 1, outptr + 2, outptr + 3);
inptr++; /* skip the 4th byte (Alpha channel) */
outptr += 4;
}
} else {
register int rindex = rgb_red[cinfo->in_color_space];
register int gindex = rgb_green[cinfo->in_color_space];
register int bindex = rgb_blue[cinfo->in_color_space];
register int aindex = alpha_index[cinfo->in_color_space];
register int ps = rgb_pixelsize[cinfo->in_color_space];
if (aindex >= 0) {
for (col = cinfo->image_width; col > 0; col--) {
outptr[bindex] = *inptr++; /* can omit GETJSAMPLE() safely */
outptr[gindex] = *inptr++;
outptr[rindex] = *inptr++;
outptr[aindex] = *inptr++;
outptr += ps;
}
} else {
for (col = cinfo->image_width; col > 0; col--) {
outptr[bindex] = *inptr++; /* can omit GETJSAMPLE() safely */
outptr[gindex] = *inptr++;
outptr[rindex] = *inptr++;
inptr++; /* skip the 4th byte (Alpha channel) */
outptr += ps;
}
}
}
return 1;
}
get_8bit_row(j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
/* This version is for reading 8-bit colormap indexes */
{
bmp_source_ptr source = (bmp_source_ptr)sinfo;
register JSAMPARRAY colormap = source->colormap;
int cmaplen = source->cmap_length;
JSAMPARRAY image_ptr;
register int t;
register JSAMPROW inptr, outptr;
register JDIMENSION col;
if (source->use_inversion_array) {
/* Fetch next row from virtual array */
source->source_row--;
image_ptr = (*cinfo->mem->access_virt_sarray)
((j_common_ptr)cinfo, source->whole_image,
source->source_row, (JDIMENSION)1, FALSE);
inptr = image_ptr[0];
} else {
if (!ReadOK(source->pub.input_file, source->iobuffer, source->row_width))
ERREXIT(cinfo, JERR_INPUT_EOF);
inptr = source->iobuffer;
}
/* Expand the colormap indexes to real data */
outptr = source->pub.buffer[0];
if (cinfo->in_color_space == JCS_GRAYSCALE) {
for (col = cinfo->image_width; col > 0; col--) {
t = GETJSAMPLE(*inptr++);
if (t >= cmaplen)
ERREXIT(cinfo, JERR_BMP_OUTOFRANGE);
*outptr++ = colormap[0][t];
}
} else if (cinfo->in_color_space == JCS_CMYK) {
for (col = cinfo->image_width; col > 0; col--) {
t = GETJSAMPLE(*inptr++);
if (t >= cmaplen)
ERREXIT(cinfo, JERR_BMP_OUTOFRANGE);
rgb_to_cmyk(colormap[0][t], colormap[1][t], colormap[2][t], outptr,
outptr + 1, outptr + 2, outptr + 3);
outptr += 4;
}
} else {
register int rindex = rgb_red[cinfo->in_color_space];
register int gindex = rgb_green[cinfo->in_color_space];
register int bindex = rgb_blue[cinfo->in_color_space];
register int aindex = alpha_index[cinfo->in_color_space];
register int ps = rgb_pixelsize[cinfo->in_color_space];
if (aindex >= 0) {
for (col = cinfo->image_width; col > 0; col--) {
t = GETJSAMPLE(*inptr++);
if (t >= cmaplen)
ERREXIT(cinfo, JERR_BMP_OUTOFRANGE);
outptr[rindex] = colormap[0][t];
outptr[gindex] = colormap[1][t];
outptr[bindex] = colormap[2][t];
outptr[aindex] = 0xFF;
outptr += ps;
}
} else {
for (col = cinfo->image_width; col > 0; col--) {
t = GETJSAMPLE(*inptr++);
if (t >= cmaplen)
ERREXIT(cinfo, JERR_BMP_OUTOFRANGE);
outptr[rindex] = colormap[0][t];
outptr[gindex] = colormap[1][t];
outptr[bindex] = colormap[2][t];
outptr += ps;
}
}
}
return 1;
}
