MINLINE void linearrgb_to_srgb_ushort4(unsigned short srgb[4], const float linear[4])
{
srgb[0] = to_srgb_table_lookup(linear[0]);
srgb[1] = to_srgb_table_lookup(linear[1]);
srgb[2] = to_srgb_table_lookup(linear[2]);
srgb[3] = FTOUSHORT(linear[3]);
}
MINLINE void linearrgb_to_srgb_ushort4_predivide(unsigned short srgb[4], const float linear[4])
{
float alpha, inv_alpha, t;
int i;
if (linear[3] == 1.0f || linear[3] == 0.0f) {
linearrgb_to_srgb_ushort4(srgb, linear);
return;
}
alpha = linear[3];
inv_alpha = 1.0f / alpha;
for (i = 0; i < 3; ++i) {
t = linear[i] * inv_alpha;
srgb[i] = (t < 1.0f) ? (unsigned short) (to_srgb_table_lookup(t) * alpha) : FTOUSHORT(linearrgb_to_srgb(t) * alpha);
}
srgb[3] = FTOUSHORT(linear[3]);
}
int imb_savepng(struct ImBuf *ibuf, const char *name, int flags)
{
png_structp png_ptr;
png_infop info_ptr;
unsigned char *pixels = NULL;
unsigned char *from, *to;
unsigned short *pixels16 = NULL, *to16;
float *from_float, from_straight[4];
png_bytepp row_pointers = NULL;
int i, bytesperpixel, color_type = PNG_COLOR_TYPE_GRAY;
FILE *fp = NULL;
int is_16bit = (ibuf->ftype & PNG_16BIT) && ibuf->rect_float;
/* use the jpeg quality setting for compression */
int compression;
compression = (int)(((float)(ibuf->ftype & 0xff) / 11.1111f));
compression = compression < 0 ? 0 : (compression > 9 ? 9 : compression);
/* for prints */
if (flags & IB_mem)
name = "<memory>";
bytesperpixel = (ibuf->planes + 7) >> 3;
if ((bytesperpixel > 4) || (bytesperpixel == 2)) {
printf("imb_savepng: Cunsupported bytes per pixel: %d for file: '%s'\n", bytesperpixel, name);
return (0);
}
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
NULL, NULL, NULL);
if (png_ptr == NULL) {
printf("imb_savepng: Cannot png_create_write_struct for file: '%s'\n", name);
return 0;
}
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL) {
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
printf("imb_savepng: Cannot png_create_info_struct for file: '%s'\n", name);
return 0;
}
if (setjmp(png_jmpbuf(png_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr);
printf("imb_savepng: Cannot setjmp for file: '%s'\n", name);
return 0;
}
/* copy image data */
if (is_16bit)
pixels16 = MEM_mallocN(ibuf->x * ibuf->y * bytesperpixel * sizeof(unsigned short), "png 16bit pixels");
else
pixels = MEM_mallocN(ibuf->x * ibuf->y * bytesperpixel * sizeof(unsigned char), "png 8bit pixels");
if (pixels == NULL && pixels16 == NULL) {
png_destroy_write_struct(&png_ptr, &info_ptr);
printf("imb_savepng: Cannot allocate pixels array of %dx%d, %d bytes per pixel for file: '%s'\n", ibuf->x, ibuf->y, bytesperpixel, name);
return 0;
}
from = (unsigned char *) ibuf->rect;
to = pixels;
from_float = ibuf->rect_float;
to16 = pixels16;
switch (bytesperpixel) {
case 4:
color_type = PNG_COLOR_TYPE_RGBA;
if (is_16bit) {
for (i = ibuf->x * ibuf->y; i > 0; i--) {
premul_to_straight_v4(from_straight, from_float);
to16[0] = FTOUSHORT(from_straight[0]);
to16[1] = FTOUSHORT(from_straight[1]);
to16[2] = FTOUSHORT(from_straight[2]);
to16[3] = FTOUSHORT(from_straight[3]);
to16 += 4; from_float += 4;
}
}
else {
for (i = ibuf->x * ibuf->y; i > 0; i--) {
to[0] = from[0];
to[1] = from[1];
to[2] = from[2];
to[3] = from[3];
to += 4; from += 4;
}
}
break;
case 3:
color_type = PNG_COLOR_TYPE_RGB;
if (is_16bit) {
for (i = ibuf->x * ibuf->y; i > 0; i--) {
premul_to_straight_v4(from_straight, from_float);
to16[0] = FTOUSHORT(from_straight[0]);
to16[1] = FTOUSHORT(from_straight[1]);
to16[2] = FTOUSHORT(from_straight[2]);
to16 += 3; from_float += 4;
}
}
else {
for (i = ibuf->x * ibuf->y; i > 0; i--) {
to[0] = from[0];
to[1] = from[1];
to[2] = from[2];
to += 3; from += 4;
}
}
break;
case 1:
color_type = PNG_COLOR_TYPE_GRAY;
if (is_16bit) {
for (i = ibuf->x * ibuf->y; i > 0; i--) {
premul_to_straight_v4(from_straight, from_float);
to16[0] = FTOUSHORT(from_straight[0]);
to16++; from_float += 4;
}
}
else {
for (i = ibuf->x * ibuf->y; i > 0; i--) {
to[0] = from[0];
to++; from += 4;
}
}
break;
}
if (flags & IB_mem) {
/* create image in memory */
imb_addencodedbufferImBuf(ibuf);
ibuf->encodedsize = 0;
png_set_write_fn(png_ptr,
(png_voidp) ibuf,
WriteData,
Flush);
}
else {
fp = BLI_fopen(name, "wb");
if (!fp) {
png_destroy_write_struct(&png_ptr, &info_ptr);
if (pixels)
MEM_freeN(pixels);
if (pixels16)
MEM_freeN(pixels16);
printf("imb_savepng: Cannot open file for writing: '%s'\n", name);
return 0;
}
png_init_io(png_ptr, fp);
}
#if 0
png_set_filter(png_ptr, 0,
PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE |
PNG_FILTER_SUB | PNG_FILTER_VALUE_SUB |
PNG_FILTER_UP | PNG_FILTER_VALUE_UP |
PNG_FILTER_AVG | PNG_FILTER_VALUE_AVG |
PNG_FILTER_PAETH | PNG_FILTER_VALUE_PAETH |
PNG_ALL_FILTERS);
#endif
png_set_compression_level(png_ptr, compression);
/* png image settings */
png_set_IHDR(png_ptr,
info_ptr,
ibuf->x,
ibuf->y,
is_16bit ? 16 : 8,
color_type,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
/* image text info */
if (ibuf->metadata) {
png_text *metadata;
ImMetaData *iptr;
int num_text = 0;
iptr = ibuf->metadata;
while (iptr) {
num_text++;
iptr = iptr->next;
}
metadata = MEM_callocN(num_text * sizeof(png_text), "png_metadata");
iptr = ibuf->metadata;
num_text = 0;
while (iptr) {
metadata[num_text].compression = PNG_TEXT_COMPRESSION_NONE;
metadata[num_text].key = iptr->key;
metadata[num_text].text = iptr->value;
num_text++;
iptr = iptr->next;
}
png_set_text(png_ptr, info_ptr, metadata, num_text);
MEM_freeN(metadata);
}
if (ibuf->ppm[0] > 0.0 && ibuf->ppm[1] > 0.0) {
png_set_pHYs(png_ptr, info_ptr, (unsigned int)(ibuf->ppm[0] + 0.5), (unsigned int)(ibuf->ppm[1] + 0.5), PNG_RESOLUTION_METER);
}
/* write the file header information */
png_write_info(png_ptr, info_ptr);
#ifdef __LITTLE_ENDIAN__
png_set_swap(png_ptr);
#endif
/* allocate memory for an array of row-pointers */
row_pointers = (png_bytepp) MEM_mallocN(ibuf->y * sizeof(png_bytep), "row_pointers");
if (row_pointers == NULL) {
printf("imb_savepng: Cannot allocate row-pointers array for file '%s'\n", name);
png_destroy_write_struct(&png_ptr, &info_ptr);
if (pixels)
MEM_freeN(pixels);
if (pixels16)
MEM_freeN(pixels16);
if (fp) {
fclose(fp);
}
return 0;
}
/* set the individual row-pointers to point at the correct offsets */
if (is_16bit) {
for (i = 0; i < ibuf->y; i++) {
row_pointers[ibuf->y - 1 - i] = (png_bytep)
((unsigned short *)pixels16 + (i * ibuf->x) * bytesperpixel);
}
}
else {
for (i = 0; i < ibuf->y; i++) {
row_pointers[ibuf->y - 1 - i] = (png_bytep)
((unsigned char *)pixels + (i * ibuf->x) * bytesperpixel * sizeof(unsigned char));
}
}
/* write out the entire image data in one call */
png_write_image(png_ptr, row_pointers);
/* write the additional chunks to the PNG file (not really needed) */
png_write_end(png_ptr, info_ptr);
/* clean up */
if (pixels)
MEM_freeN(pixels);
if (pixels16)
MEM_freeN(pixels16);
MEM_freeN(row_pointers);
png_destroy_write_struct(&png_ptr, &info_ptr);
if (fp) {
fflush(fp);
fclose(fp);
}
return(1);
}
/* wrap to avoid macro calling functions multiple times */
BLI_INLINE unsigned short ftoshort(float val)
{
return FTOUSHORT(val);
}
int imb_savetiff(ImBuf *ibuf, const char *name, int flags)
{
TIFF *image = NULL;
uint16 samplesperpixel, bitspersample;
size_t npixels;
unsigned char *pixels = NULL;
unsigned char *from = NULL, *to = NULL;
unsigned short *pixels16 = NULL, *to16 = NULL;
float *fromf = NULL;
float xres, yres;
int x, y, from_i, to_i, i;
/* check for a valid number of bytes per pixel. Like the PNG writer,
* the TIFF writer supports 1, 3 or 4 bytes per pixel, corresponding
* to gray, RGB, RGBA respectively. */
samplesperpixel = (uint16)((ibuf->planes + 7) >> 3);
if ((samplesperpixel > 4) || (samplesperpixel == 2)) {
fprintf(stderr,
"imb_savetiff: unsupported number of bytes per "
"pixel: %d\n", samplesperpixel);
return (0);
}
if ((ibuf->ftype & TIF_16BIT) && ibuf->rect_float)
bitspersample = 16;
else
bitspersample = 8;
/* open TIFF file for writing */
if (flags & IB_mem) {
/* bork at the creation of a TIFF in memory */
fprintf(stderr,
"imb_savetiff: creation of in-memory TIFF files is "
"not yet supported.\n");
return (0);
}
else {
/* create image as a file */
#ifdef WIN32
wchar_t *wname = alloc_utf16_from_8(name, 0);
image = TIFFOpenW(wname, "w");
free(wname);
#else
image = TIFFOpen(name, "w");
#endif
}
if (image == NULL) {
fprintf(stderr,
"imb_savetiff: could not open TIFF for writing.\n");
return (0);
}
/* allocate array for pixel data */
npixels = ibuf->x * ibuf->y;
if (bitspersample == 16)
pixels16 = (unsigned short *)_TIFFmalloc(npixels *
samplesperpixel * sizeof(unsigned short));
else
pixels = (unsigned char *)_TIFFmalloc(npixels *
samplesperpixel * sizeof(unsigned char));
if (pixels == NULL && pixels16 == NULL) {
fprintf(stderr,
"imb_savetiff: could not allocate pixels array.\n");
TIFFClose(image);
return (0);
}
/* setup pointers */
if (bitspersample == 16) {
fromf = ibuf->rect_float;
to16 = pixels16;
}
else {
from = (unsigned char *)ibuf->rect;
to = pixels;
}
/* setup samples per pixel */
TIFFSetField(image, TIFFTAG_BITSPERSAMPLE, bitspersample);
TIFFSetField(image, TIFFTAG_SAMPLESPERPIXEL, samplesperpixel);
if (samplesperpixel == 4) {
unsigned short extraSampleTypes[1];
if (bitspersample == 16)
extraSampleTypes[0] = EXTRASAMPLE_ASSOCALPHA;
else
extraSampleTypes[0] = EXTRASAMPLE_UNASSALPHA;
/* RGBA images */
TIFFSetField(image, TIFFTAG_EXTRASAMPLES, 1,
extraSampleTypes);
TIFFSetField(image, TIFFTAG_PHOTOMETRIC,
PHOTOMETRIC_RGB);
}
else if (samplesperpixel == 3) {
/* RGB images */
TIFFSetField(image, TIFFTAG_PHOTOMETRIC,
PHOTOMETRIC_RGB);
}
else if (samplesperpixel == 1) {
/* grayscale images, 1 channel */
TIFFSetField(image, TIFFTAG_PHOTOMETRIC,
PHOTOMETRIC_MINISBLACK);
}
/* copy pixel data. While copying, we flip the image vertically. */
for (x = 0; x < ibuf->x; x++) {
for (y = 0; y < ibuf->y; y++) {
from_i = 4 * (y * ibuf->x + x);
to_i = samplesperpixel * ((ibuf->y - y - 1) * ibuf->x + x);
if (pixels16) {
/* convert from float source */
float rgb[4];
if (ibuf->float_colorspace) {
/* float buffer was managed already, no need in color space conversion */
copy_v3_v3(rgb, &fromf[from_i]);
}
else {
/* standard linear-to-srgb conversion if float buffer wasn't managed */
linearrgb_to_srgb_v3_v3(rgb, &fromf[from_i]);
}
rgb[3] = fromf[from_i + 3];
for (i = 0; i < samplesperpixel; i++, to_i++)
to16[to_i] = FTOUSHORT(rgb[i]);
}
else {
for (i = 0; i < samplesperpixel; i++, to_i++, from_i++)
to[to_i] = from[from_i];
}
}
}
/* write the actual TIFF file */
TIFFSetField(image, TIFFTAG_IMAGEWIDTH, ibuf->x);
TIFFSetField(image, TIFFTAG_IMAGELENGTH, ibuf->y);
TIFFSetField(image, TIFFTAG_ROWSPERSTRIP, ibuf->y);
TIFFSetField(image, TIFFTAG_COMPRESSION, COMPRESSION_DEFLATE);
TIFFSetField(image, TIFFTAG_FILLORDER, FILLORDER_MSB2LSB);
TIFFSetField(image, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
if (ibuf->ppm[0] > 0.0 && ibuf->ppm[1] > 0.0) {
xres = (float)(ibuf->ppm[0] * 0.0254);
yres = (float)(ibuf->ppm[1] * 0.0254);
}
else {
xres = yres = IMB_DPI_DEFAULT;
}
TIFFSetField(image, TIFFTAG_XRESOLUTION, xres);
TIFFSetField(image, TIFFTAG_YRESOLUTION, yres);
TIFFSetField(image, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
if (TIFFWriteEncodedStrip(image, 0,
(bitspersample == 16) ? (unsigned char *)pixels16 : pixels,
ibuf->x * ibuf->y * samplesperpixel * bitspersample / 8) == -1)
{
fprintf(stderr,
"imb_savetiff: Could not write encoded TIFF.\n");
TIFFClose(image);
if (pixels) _TIFFfree(pixels);
if (pixels16) _TIFFfree(pixels16);
return (1);
}
/* close the TIFF file */
TIFFClose(image);
if (pixels) _TIFFfree(pixels);
if (pixels16) _TIFFfree(pixels16);
return (1);
}
int imb_savetiff(ImBuf *ibuf, const char *name, int flags)
{
TIFF *image = NULL;
uint16 samplesperpixel, bitspersample;
size_t npixels;
unsigned char *pixels = NULL;
unsigned char *from = NULL, *to = NULL;
unsigned short *pixels16 = NULL, *to16 = NULL;
float *fromf = NULL;
int x, y, from_i, to_i, i;
int extraSampleTypes[1] = { EXTRASAMPLE_ASSOCALPHA };
/* check for a valid number of bytes per pixel. Like the PNG writer,
* the TIFF writer supports 1, 3 or 4 bytes per pixel, corresponding
* to gray, RGB, RGBA respectively. */
samplesperpixel = (uint16)((ibuf->depth + 7) >> 3);
if((samplesperpixel > 4) || (samplesperpixel == 2)) {
fprintf(stderr,
"imb_savetiff: unsupported number of bytes per "
"pixel: %d\n", samplesperpixel);
return (0);
}
if((ibuf->ftype & TIF_16BIT) && ibuf->rect_float)
bitspersample = 16;
else
bitspersample = 8;
/* open TIFF file for writing */
if(flags & IB_mem) {
/* bork at the creation of a TIFF in memory */
fprintf(stderr,
"imb_savetiff: creation of in-memory TIFF files is "
"not yet supported.\n");
return (0);
}
else {
/* create image as a file */
image = TIFFOpen(name, "w");
}
if(image == NULL) {
fprintf(stderr,
"imb_savetiff: could not open TIFF for writing.\n");
return (0);
}
/* allocate array for pixel data */
npixels = ibuf->x * ibuf->y;
if(bitspersample == 16)
pixels16 = (unsigned short*)_TIFFmalloc(npixels *
samplesperpixel * sizeof(unsigned short));
else
pixels = (unsigned char*)_TIFFmalloc(npixels *
samplesperpixel * sizeof(unsigned char));
if(pixels == NULL && pixels16 == NULL) {
fprintf(stderr,
"imb_savetiff: could not allocate pixels array.\n");
TIFFClose(image);
return (0);
}
/* setup pointers */
if(bitspersample == 16) {
fromf = ibuf->rect_float;
to16 = pixels16;
}
else {
from = (unsigned char*)ibuf->rect;
to = pixels;
}
/* setup samples per pixel */
TIFFSetField(image, TIFFTAG_BITSPERSAMPLE, bitspersample);
TIFFSetField(image, TIFFTAG_SAMPLESPERPIXEL, samplesperpixel);
if(samplesperpixel == 4) {
/* RGBA images */
TIFFSetField(image, TIFFTAG_EXTRASAMPLES, 1,
extraSampleTypes);
TIFFSetField(image, TIFFTAG_PHOTOMETRIC,
PHOTOMETRIC_RGB);
}
else if(samplesperpixel == 3) {
/* RGB images */
TIFFSetField(image, TIFFTAG_PHOTOMETRIC,
PHOTOMETRIC_RGB);
}
else if(samplesperpixel == 1) {
/* greyscale images, 1 channel */
TIFFSetField(image, TIFFTAG_PHOTOMETRIC,
PHOTOMETRIC_MINISBLACK);
}
/* copy pixel data. While copying, we flip the image vertically. */
for(x = 0; x < ibuf->x; x++) {
for(y = 0; y < ibuf->y; y++) {
from_i = 4*(y*ibuf->x+x);
to_i = samplesperpixel*((ibuf->y-y-1)*ibuf->x+x);
if(pixels16) {
/* convert from float source */
float rgb[3];
if (ibuf->profile == IB_PROFILE_LINEAR_RGB)
linearrgb_to_srgb_v3_v3(rgb, &fromf[from_i]);
else
copy_v3_v3(rgb, &fromf[from_i]);
to16[to_i+0] = FTOUSHORT(rgb[0]);
to16[to_i+1] = FTOUSHORT(rgb[1]);
to16[to_i+2] = FTOUSHORT(rgb[2]);
to_i += 3; from_i+=3;
if (samplesperpixel == 4) {
to16[to_i+3] = FTOUSHORT(fromf[from_i+3]);
/*to_i++; from_i++;*/ /*unused, set on each loop */
}
}
else {
for(i = 0; i < samplesperpixel; i++, to_i++, from_i++)
to[to_i] = from[from_i];
}
}
}
/* write the actual TIFF file */
TIFFSetField(image, TIFFTAG_IMAGEWIDTH, ibuf->x);
TIFFSetField(image, TIFFTAG_IMAGELENGTH, ibuf->y);
TIFFSetField(image, TIFFTAG_ROWSPERSTRIP, ibuf->y);
TIFFSetField(image, TIFFTAG_COMPRESSION, COMPRESSION_DEFLATE);
TIFFSetField(image, TIFFTAG_FILLORDER, FILLORDER_MSB2LSB);
TIFFSetField(image, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(image, TIFFTAG_XRESOLUTION, 150.0);
TIFFSetField(image, TIFFTAG_YRESOLUTION, 150.0);
TIFFSetField(image, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
if(TIFFWriteEncodedStrip(image, 0,
(bitspersample == 16)? (unsigned char*)pixels16: pixels,
ibuf->x*ibuf->y*samplesperpixel*bitspersample/8) == -1) {
fprintf(stderr,
"imb_savetiff: Could not write encoded TIFF.\n");
TIFFClose(image);
if(pixels) _TIFFfree(pixels);
if(pixels16) _TIFFfree(pixels16);
return (1);
}
/* close the TIFF file */
TIFFClose(image);
if(pixels) _TIFFfree(pixels);
if(pixels16) _TIFFfree(pixels16);
return (1);
}