static struct ImBuf *imb_load_dpx_cineon(unsigned char *mem, int use_cineon, int size, int flags)
{
ImBuf *ibuf;
LogImageFile *image;
int x, y;
unsigned short *row, *upix;
int width, height, depth;
float *frow;
logImageSetVerbose((G.f & G_DEBUG) ? 1:0);
image = logImageOpenFromMem(mem, size, use_cineon);
if (!image) {
printf("no image!\n");
return NULL;
}
logImageGetSize(image, &width, &height, &depth);
if (depth != 3) { /*need to do greyscale loading eventually.*/
logImageClose(image);
return NULL;
}
if (width == 0 && height == 0) {
logImageClose(image);
return NULL;
}
ibuf = IMB_allocImBuf(width, height, 32, IB_rectfloat | flags);
row = MEM_mallocN(sizeof(unsigned short)*width*depth, "row in cineon_dpx.c");
frow = ibuf->rect_float+width*height*4;
for (y = 0; y < height; y++) {
logImageGetRowBytes(image, row, y); /* checks image->params.doLogarithm and convert */
upix = row;
frow -= width*4;
for (x=0; x<width; x++) {
*(frow++) = ((float)*(upix++)) / 65535.0f;
*(frow++) = ((float)*(upix++)) / 65535.0f;
*(frow++) = ((float)*(upix++)) / 65535.0f;
*(frow++) = 1.0f;
}
frow -= width*4;
}
MEM_freeN(row);
logImageClose(image);
if (flags & IB_rect) {
IMB_rect_from_float(ibuf);
}
return ibuf;
}
static struct ImBuf *imb_load_dpx_cineon(unsigned char *mem, size_t size, int use_cineon, int flags,
char colorspace[IM_MAX_SPACE])
{
ImBuf *ibuf;
LogImageFile *image;
int width, height, depth;
colorspace_set_default_role(colorspace, IM_MAX_SPACE, COLOR_ROLE_DEFAULT_FLOAT);
logImageSetVerbose((G.f & G_DEBUG) ? 1 : 0);
image = logImageOpenFromMemory(mem, size);
if (image == 0) {
printf("DPX/Cineon: error opening image.\n");
return 0;
}
logImageGetSize(image, &width, &height, &depth);
if (width == 0 || height == 0) {
logImageClose(image);
return 0;
}
ibuf = IMB_allocImBuf(width, height, 32, IB_rectfloat | flags);
if (ibuf == 0) {
logImageClose(image);
return 0;
}
if (logImageGetDataRGBA(image, ibuf->rect_float, 1) != 0) {
/* Conversion not possible (probably because the format is unsupported) */
logImageClose(image);
MEM_freeN(ibuf);
return 0;
}
logImageClose(image);
ibuf->ftype = use_cineon ? CINEON : DPX;
IMB_flipy(ibuf);
if (flags & IB_rect)
IMB_rect_from_float(ibuf);
if (flags & IB_alphamode_detect)
ibuf->flags |= IB_alphamode_premul;
return ibuf;
}
static struct ImBuf *imb_load_dpx_cineon(unsigned char *mem, size_t size, int use_cineon, int flags,
char colorspace[IM_MAX_SPACE])
{
ImBuf *ibuf;
LogImageFile *image;
int width, height, depth;
colorspace_set_default_role(colorspace, IM_MAX_SPACE, COLOR_ROLE_DEFAULT_FLOAT);
logImageSetVerbose((G.f & G_DEBUG) ? 1 : 0);
image = logImageOpenFromMemory(mem, size);
if (image == NULL) {
printf("DPX/Cineon: error opening image.\n");
return NULL;
}
logImageGetSize(image, &width, &height, &depth);
ibuf = IMB_allocImBuf(width, height, 32, IB_rectfloat | flags);
if (ibuf == NULL) {
logImageClose(image);
return NULL;
}
if (!(flags & IB_test)) {
if (logImageGetDataRGBA(image, ibuf->rect_float, 1) != 0) {
logImageClose(image);
IMB_freeImBuf(ibuf);
return NULL;
}
IMB_flipy(ibuf);
}
logImageClose(image);
ibuf->ftype = use_cineon ? CINEON : DPX;
if (flags & IB_alphamode_detect)
ibuf->flags |= IB_alphamode_premul;
return ibuf;
}
static int imb_save_dpx_cineon(ImBuf *ibuf, const char *filename, int use_cineon, int flags)
{
LogImageByteConversionParameters conversion;
const int width= ibuf->x;
const int height= ibuf->y;
const int depth= 3;
LogImageFile* logImage;
unsigned short* line, *pixel;
int i, j;
float *fline;
float *fbuf;
int is_alloc= 0;
(void)flags; /* unused */
// cineon_conversion_parameters(&conversion);
logImageGetByteConversionDefaults(&conversion);
/*
* Get the drawable for the current image...
*/
fbuf= IMB_float_profile_ensure(ibuf, conversion.doLogarithm ? IB_PROFILE_LINEAR_RGB : IB_PROFILE_NONE, &is_alloc);
if (fbuf == NULL) { /* in the unlikely event that converting to a float buffer fails */
return 0;
}
logImageSetVerbose((G.f & G_DEBUG) ? 1:0);
logImage = logImageCreate(filename, use_cineon, width, height, depth);
if (!logImage) return 0;
if(logImageSetByteConversion(logImage, &conversion)==0) {
printf("error setting args\n");
}
line = MEM_mallocN(sizeof(unsigned short)*depth*width, "line");
/*note that image is flipped when sent to logImageSetRowBytes (see last passed parameter).*/
for (j = 0; j < height; ++j) {
fline = &fbuf[width*j*4];
for (i=0; i<width; i++) {
float *fpix, fpix2[3];
/*we have to convert to cinepaint's 16-bit-per-channel here*/
pixel = &line[i*depth];
fpix = &fline[i*4];
memcpy(fpix2, fpix, sizeof(float)*3);
if (fpix2[0]>=1.0f) fpix2[0] = 1.0f; else if (fpix2[0]<0.0f) fpix2[0]= 0.0f;
if (fpix2[1]>=1.0f) fpix2[1] = 1.0f; else if (fpix2[1]<0.0f) fpix2[1]= 0.0f;
if (fpix2[2]>=1.0f) fpix2[2] = 1.0f; else if (fpix2[2]<0.0f) fpix2[2]= 0.0f;
pixel[0] = (unsigned short)(fpix2[0] * 65535.0f); /*float-float math is faster*/
pixel[1] = (unsigned short)(fpix2[1] * 65535.0f);
pixel[2] = (unsigned short)(fpix2[2] * 65535.0f);
}
logImageSetRowBytes(logImage, (const unsigned short*)line, height-1-j);
}
logImageClose(logImage);
MEM_freeN(line);
if(is_alloc) {
MEM_freeN(fbuf);
}
return 1;
}
LogImageFile *cineonCreate(const char *filename, int width, int height, int bitsPerSample, const char *creator)
{
CineonMainHeader header;
const char *shortFilename = NULL;
/* unsigned char pad[6044]; */
LogImageFile *cineon = (LogImageFile *)MEM_mallocN(sizeof(LogImageFile), __func__);
if (cineon == NULL) {
if (verbose) printf("cineon: Failed to malloc cineon file structure.\n");
return NULL;
}
/* Only 10 bits Cineon are supported */
if (bitsPerSample != 10) {
if (verbose) printf("cineon: Only 10 bits Cineon are supported.\n");
logImageClose(cineon);
return NULL;
}
cineon->width = width;
cineon->height = height;
cineon->element[0].bitsPerSample = 10;
cineon->element[0].dataOffset = sizeof(CineonMainHeader);
cineon->element[0].maxValue = 1023;
cineon->isMSB = 1;
cineon->numElements = 1;
cineon->element[0].packing = 1;
cineon->depth = 3;
cineon->element[0].depth = 3;
cineon->element[0].descriptor = descriptor_RGB;
cineon->element[0].transfer = transfer_PrintingDensity;
cineon->element[0].refHighQuantity = 2.048f;
cineon->element[0].refLowQuantity = 0;
cineon->element[0].refLowData = 0;
cineon->element[0].refHighData = cineon->element[0].maxValue;
cineon->referenceWhite = 685.0f;
cineon->referenceBlack = 95.0f;
cineon->gamma = 1.7f;
shortFilename = strrchr(filename, '/');
if (shortFilename == NULL)
shortFilename = filename;
else
shortFilename++;
cineon->file = BLI_fopen(filename, "wb");
if (cineon->file == NULL) {
if (verbose) printf("cineon: Couldn't open file %s\n", filename);
logImageClose(cineon);
return NULL;
}
fillCineonMainHeader(cineon, &header, shortFilename, creator);
if (fwrite(&header, sizeof(header), 1, cineon->file) == 0) {
if (verbose) printf("cineon: Couldn't write image header\n");
logImageClose(cineon);
return NULL;
}
return cineon;
}
LogImageFile *cineonOpen(const unsigned char *byteStuff, int fromMemory, size_t bufferSize)
{
CineonMainHeader header;
LogImageFile *cineon = (LogImageFile *)MEM_mallocN(sizeof(LogImageFile), __func__);
const char *filename = (const char *)byteStuff;
int i;
unsigned int dataOffset;
if (cineon == NULL) {
if (verbose) printf("Cineon: Failed to malloc cineon file structure.\n");
return NULL;
}
/* zero the header */
memset(&header, 0, sizeof(CineonMainHeader));
/* for close routine */
cineon->file = NULL;
if (fromMemory == 0) {
/* byteStuff is then the filename */
cineon->file = BLI_fopen(filename, "rb");
if (cineon->file == NULL) {
if (verbose) printf("Cineon: Failed to open file \"%s\".\n", filename);
logImageClose(cineon);
return NULL;
}
/* not used in this case */
cineon->memBuffer = NULL;
cineon->memCursor = NULL;
cineon->memBufferSize = 0;
}
else {
cineon->memBuffer = (unsigned char *)byteStuff;
cineon->memCursor = (unsigned char *)byteStuff;
cineon->memBufferSize = bufferSize;
}
if (logimage_fread(&header, sizeof(header), 1, cineon) == 0) {
if (verbose) printf("Cineon: Not enough data for header in \"%s\".\n", byteStuff);
logImageClose(cineon);
return NULL;
}
/* endianness determination */
if (header.fileHeader.magic_num == swap_uint(CINEON_FILE_MAGIC, 1)) {
cineon->isMSB = 1;
if (verbose) printf("Cineon: File is MSB.\n");
}
else if (header.fileHeader.magic_num == CINEON_FILE_MAGIC) {
cineon->isMSB = 0;
if (verbose) printf("Cineon: File is LSB.\n");
}
else {
if (verbose) printf("Cineon: Bad magic number %lu in \"%s\".\n",
(unsigned long)header.fileHeader.magic_num, byteStuff);
logImageClose(cineon);
return NULL;
}
cineon->width = swap_uint(header.imageHeader.element[0].pixels_per_line, cineon->isMSB);
cineon->height = swap_uint(header.imageHeader.element[0].lines_per_image, cineon->isMSB);
if (cineon->width == 0 || cineon->height == 0) {
if (verbose) printf("Cineon: Wrong image dimension: %dx%d\n", cineon->width, cineon->height);
logImageClose(cineon);
return NULL;
}
cineon->depth = header.imageHeader.elements_per_image;
cineon->srcFormat = format_Cineon;
if (header.imageHeader.interleave == 0)
cineon->numElements = 1;
else if (header.imageHeader.interleave == 2)
cineon->numElements = header.imageHeader.elements_per_image;
else {
if (verbose) printf("Cineon: Data interleave not supported: %d\n", header.imageHeader.interleave);
logImageClose(cineon);
return NULL;
}
if (cineon->depth == 1) {
/* Grayscale image */
cineon->element[0].descriptor = descriptor_Luminance;
cineon->element[0].transfer = transfer_Linear;
cineon->element[0].depth = 1;
}
else if (cineon->depth == 3) {
/* RGB image */
if (cineon->numElements == 1) {
cineon->element[0].descriptor = descriptor_RGB;
cineon->element[0].transfer = transfer_PrintingDensity;
cineon->element[0].depth = 3;
}
else if (cineon->numElements == 3) {
cineon->element[0].descriptor = descriptor_Red;
cineon->element[0].transfer = transfer_PrintingDensity;
cineon->element[0].depth = 1;
cineon->element[1].descriptor = descriptor_Green;
cineon->element[1].transfer = transfer_PrintingDensity;
cineon->element[1].depth = 1;
cineon->element[2].descriptor = descriptor_Blue;
cineon->element[2].transfer = transfer_PrintingDensity;
cineon->element[2].depth = 1;
}
}
else {
if (verbose) printf("Cineon: Cineon image depth unsupported: %d\n", cineon->depth);
logImageClose(cineon);
return NULL;
}
dataOffset = swap_uint(header.fileHeader.offset, cineon->isMSB);
for (i = 0; i < cineon->numElements; i++) {
cineon->element[i].bitsPerSample = header.imageHeader.element[i].bits_per_sample;
cineon->element[i].maxValue = powf(2, cineon->element[i].bitsPerSample) - 1.0f;
cineon->element[i].refLowData = swap_uint(header.imageHeader.element[i].ref_low_data, cineon->isMSB);
cineon->element[i].refLowQuantity = swap_float(header.imageHeader.element[i].ref_low_quantity, cineon->isMSB);
cineon->element[i].refHighData = swap_uint(header.imageHeader.element[i].ref_high_data, cineon->isMSB);
cineon->element[i].refHighQuantity = swap_float(header.imageHeader.element[i].ref_high_quantity, cineon->isMSB);
switch (header.imageHeader.packing) {
case 0:
cineon->element[i].packing = 0;
break;
case 5:
cineon->element[i].packing = 1;
break;
case 6:
cineon->element[i].packing = 2;
break;
default:
/* Not supported */
if (verbose) printf("Cineon: packing unsupported: %d\n", header.imageHeader.packing);
logImageClose(cineon);
return NULL;
}
if (cineon->element[i].refLowData == CINEON_UNDEFINED_U32)
cineon->element[i].refLowData = 0;
if (cineon->element[i].refHighData == CINEON_UNDEFINED_U32)
cineon->element[i].refHighData = (unsigned int)cineon->element[i].maxValue;
if (cineon->element[i].refLowQuantity == CINEON_UNDEFINED_R32 || isnan(cineon->element[i].refLowQuantity))
cineon->element[i].refLowQuantity = 0.0f;
if (cineon->element[i].refHighQuantity == CINEON_UNDEFINED_R32 || isnan(cineon->element[i].refHighQuantity)) {
if (cineon->element[i].transfer == transfer_PrintingDensity)
cineon->element[i].refHighQuantity = 2.048f;
else
cineon->element[i].refHighQuantity = cineon->element[i].maxValue;
}
cineon->element[i].dataOffset = dataOffset;
dataOffset += cineon->height * getRowLength(cineon->width, cineon->element[i]);
}
cineon->referenceBlack = 95.0f / 1023.0f * cineon->element[0].maxValue;
cineon->referenceWhite = 685.0f / 1023.0f * cineon->element[0].maxValue;
cineon->gamma = 1.7f;
if (verbose) {
printf("size %d x %d x %d elements\n", cineon->width, cineon->height, cineon->numElements);
for (i = 0; i < cineon->numElements; i++) {
printf(" Element %d:\n", i);
printf(" Bits per sample: %d\n", cineon->element[i].bitsPerSample);
printf(" Depth: %d\n", cineon->element[i].depth);
printf(" Transfer characteristics: %d\n", cineon->element[i].transfer);
printf(" Packing: %d\n", cineon->element[i].packing);
printf(" Descriptor: %d\n", cineon->element[i].descriptor);
printf(" Data offset: %u\n", cineon->element[i].dataOffset);
printf(" Reference low data: %u\n", cineon->element[i].refLowData);
printf(" Reference low quantity: %f\n", cineon->element[i].refLowQuantity);
printf(" Reference high data: %u\n", cineon->element[i].refHighData);
printf(" Reference high quantity: %f\n", cineon->element[i].refHighQuantity);
printf("\n");
}
printf("Gamma: %f\n", cineon->gamma);
printf("Reference black: %f\n", cineon->referenceBlack);
printf("Reference white: %f\n", cineon->referenceWhite);
printf("----------------------------\n");
}
return cineon;
}
static int imb_save_dpx_cineon(ImBuf *ibuf, const char *filename, int use_cineon, int flags)
{
LogImageFile *logImage;
float *fbuf;
float *fbuf_ptr;
unsigned char *rect_ptr;
int x, y, depth, bitspersample, rvalue;
if (flags & IB_mem) {
printf("DPX/Cineon: saving in memory is not supported.\n");
return 0;
}
logImageSetVerbose((G.f & G_DEBUG) ? 1 : 0);
depth = (ibuf->planes + 7) >> 3;
if (depth > 4 || depth < 3) {
printf("DPX/Cineon: unsupported depth: %d for file: '%s'\n", depth, filename);
return 0;
}
if (ibuf->ftype & CINEON_10BIT)
bitspersample = 10;
else if (ibuf->ftype & CINEON_12BIT)
bitspersample = 12;
else if (ibuf->ftype & CINEON_16BIT)
bitspersample = 16;
else
bitspersample = 8;
logImage = logImageCreate(filename, use_cineon, ibuf->x, ibuf->y, bitspersample, (depth == 4),
(ibuf->ftype & CINEON_LOG), -1, -1, -1, "Blender");
if (logImage == NULL) {
printf("DPX/Cineon: error creating file.\n");
return 0;
}
if (ibuf->rect_float != NULL && bitspersample != 8) {
/* don't use the float buffer to save 8 bpp picture to prevent color banding
* (there's no dithering algorithm behing the logImageSetDataRGBA function) */
fbuf = (float *)MEM_mallocN(ibuf->x * ibuf->y * 4 * sizeof(float), "fbuf in imb_save_dpx_cineon");
for (y = 0; y < ibuf->y; y++) {
float *dst_ptr = fbuf + 4 * ((ibuf->y - y - 1) * ibuf->x);
float *src_ptr = ibuf->rect_float + 4 * (y * ibuf->x);
memcpy(dst_ptr, src_ptr, 4 * ibuf->x * sizeof(float));
}
rvalue = (logImageSetDataRGBA(logImage, fbuf, 1) == 0);
MEM_freeN(fbuf);
}
else {
if (ibuf->rect == NULL)
IMB_rect_from_float(ibuf);
fbuf = (float *)MEM_mallocN(ibuf->x * ibuf->y * 4 * sizeof(float), "fbuf in imb_save_dpx_cineon");
if (fbuf == NULL) {
printf("DPX/Cineon: error allocating memory.\n");
logImageClose(logImage);
return 0;
}
for (y = 0; y < ibuf->y; y++) {
for (x = 0; x < ibuf->x; x++) {
fbuf_ptr = fbuf + 4 * ((ibuf->y - y - 1) * ibuf->x + x);
rect_ptr = (unsigned char *)ibuf->rect + 4 * (y * ibuf->x + x);
fbuf_ptr[0] = (float)rect_ptr[0] / 255.0f;
fbuf_ptr[1] = (float)rect_ptr[1] / 255.0f;
fbuf_ptr[2] = (float)rect_ptr[2] / 255.0f;
fbuf_ptr[3] = (depth == 4) ? ((float)rect_ptr[3] / 255.0f) : 1.0f;
}
}
rvalue = (logImageSetDataRGBA(logImage, fbuf, 0) == 0);
MEM_freeN(fbuf);
}
logImageClose(logImage);
return rvalue;
}
LogImageFile *dpxCreate(const char *filename, int width, int height, int bitsPerSample, int hasAlpha,
int isLogarithmic, int referenceWhite, int referenceBlack, float gamma,
const char *creator)
{
DpxMainHeader header;
const char *shortFilename = NULL;
unsigned char pad[6044];
LogImageFile *dpx = (LogImageFile *)MEM_mallocN(sizeof(LogImageFile), __func__);
if (dpx == NULL) {
if (verbose) printf("DPX: Failed to malloc dpx file structure.\n");
return NULL;
}
dpx->width = width;
dpx->height = height;
dpx->element[0].bitsPerSample = bitsPerSample;
dpx->element[0].dataOffset = 8092;
dpx->element[0].maxValue = powf(2, dpx->element[0].bitsPerSample) - 1.0f;
dpx->isMSB = 1;
dpx->numElements = 1;
switch (bitsPerSample) {
case 8:
case 16:
dpx->element[0].packing = 0;
break;
case 10:
case 12:
/* Packed Type A padding is the most common 10/12 bits format */
dpx->element[0].packing = 1;
break;
default:
if (verbose) printf("DPX: bitsPerSample not supported: %d\n", bitsPerSample);
logImageClose(dpx);
return NULL;
}
if (hasAlpha == 0) {
dpx->depth = 3;
dpx->element[0].depth = 3;
dpx->element[0].descriptor = descriptor_RGB;
}
else {
dpx->depth = 4;
dpx->element[0].depth = 4;
dpx->element[0].descriptor = descriptor_RGBA;
}
if (isLogarithmic == 0) {
dpx->element[0].transfer = transfer_Linear;
dpx->element[0].refHighQuantity = dpx->element[0].maxValue;
}
else {
dpx->element[0].transfer = transfer_PrintingDensity;
dpx->element[0].refHighQuantity = 2.048f;
}
dpx->element[0].refLowQuantity = 0;
dpx->element[0].refLowData = 0;
dpx->element[0].refHighData = dpx->element[0].maxValue;
if (referenceWhite > 0)
dpx->referenceWhite = referenceWhite;
else
dpx->referenceWhite = 685.0f / 1023.0f * dpx->element[0].maxValue;
if (referenceBlack > 0)
dpx->referenceBlack = referenceBlack;
else
dpx->referenceBlack = 95.0f / 1023.0f * dpx->element[0].maxValue;
if (gamma > 0.0f)
dpx->gamma = gamma;
else
dpx->gamma = 1.7f;
shortFilename = strrchr(filename, '/');
if (shortFilename == NULL)
shortFilename = filename;
else
shortFilename++;
dpx->file = BLI_fopen(filename, "wb");
if (dpx->file == NULL) {
if (verbose) printf("DPX: Couldn't open file %s\n", filename);
logImageClose(dpx);
return NULL;
}
fillDpxMainHeader(dpx, &header, shortFilename, creator);
if (fwrite(&header, sizeof(header), 1, dpx->file) == 0) {
if (verbose) printf("DPX: Couldn't write image header\n");
logImageClose(dpx);
return NULL;
}
/* Header should be rounded to next 8k block
* 6044 = 8092 - sizeof(DpxMainHeader) */
memset(&pad, 0, 6044);
if (fwrite(&pad, 6044, 1, dpx->file) == 0) {
if (verbose) printf("DPX: Couldn't write image header\n");
logImageClose(dpx);
return NULL;
}
return dpx;
}
LogImageFile *dpxOpen(const unsigned char *byteStuff, int fromMemory, size_t bufferSize)
{
DpxMainHeader header;
LogImageFile *dpx = (LogImageFile *)MEM_mallocN(sizeof(LogImageFile), __func__);
const char *filename = (const char *)byteStuff;
int i;
if (dpx == NULL) {
if (verbose) printf("DPX: Failed to malloc dpx file structure.\n");
return NULL;
}
/* zero the header */
memset(&header, 0, sizeof(DpxMainHeader));
/* for close routine */
dpx->file = NULL;
if (fromMemory == 0) {
/* byteStuff is then the filename */
dpx->file = BLI_fopen(filename, "rb");
if (dpx->file == NULL) {
if (verbose) printf("DPX: Failed to open file \"%s\".\n", filename);
logImageClose(dpx);
return NULL;
}
/* not used in this case */
dpx->memBuffer = NULL;
dpx->memCursor = NULL;
dpx->memBufferSize = 0;
}
else {
dpx->memBuffer = (unsigned char *)byteStuff;
dpx->memCursor = (unsigned char *)byteStuff;
dpx->memBufferSize = bufferSize;
}
if (logimage_fread(&header, sizeof(header), 1, dpx) == 0) {
if (verbose) printf("DPX: Not enough data for header in \"%s\".\n", byteStuff);
logImageClose(dpx);
return NULL;
}
/* endianness determination */
if (header.fileHeader.magic_num == swap_uint(DPX_FILE_MAGIC, 1)) {
dpx->isMSB = 1;
if (verbose) printf("DPX: File is MSB.\n");
}
else if (header.fileHeader.magic_num == DPX_FILE_MAGIC) {
dpx->isMSB = 0;
if (verbose) printf("DPX: File is LSB.\n");
}
else {
if (verbose) {
printf("DPX: Bad magic number %u in \"%s\".\n",
header.fileHeader.magic_num, byteStuff);
}
logImageClose(dpx);
return NULL;
}
dpx->srcFormat = format_DPX;
dpx->numElements = swap_ushort(header.imageHeader.elements_per_image, dpx->isMSB);
if (dpx->numElements == 0) {
if (verbose) printf("DPX: Wrong number of elements: %d\n", dpx->numElements);
logImageClose(dpx);
return NULL;
}
dpx->width = swap_uint(header.imageHeader.pixels_per_line, dpx->isMSB);
dpx->height = swap_uint(header.imageHeader.lines_per_element, dpx->isMSB);
if (dpx->width == 0 || dpx->height == 0) {
if (verbose) printf("DPX: Wrong image dimension: %dx%d\n", dpx->width, dpx->height);
logImageClose(dpx);
return NULL;
}
dpx->depth = 0;
for (i = 0; i < dpx->numElements; i++) {
dpx->element[i].descriptor = header.imageHeader.element[i].descriptor;
switch (dpx->element[i].descriptor) {
case descriptor_Red:
case descriptor_Green:
case descriptor_Blue:
case descriptor_Alpha:
case descriptor_Luminance:
case descriptor_Chrominance:
dpx->depth++;
dpx->element[i].depth = 1;
break;
case descriptor_CbYCrY:
dpx->depth += 2;
dpx->element[i].depth = 2;
break;
case descriptor_RGB:
case descriptor_CbYCr:
case descriptor_CbYACrYA:
dpx->depth += 3;
dpx->element[i].depth = 3;
break;
case descriptor_RGBA:
case descriptor_ABGR:
case descriptor_CbYCrA:
dpx->depth += 4;
dpx->element[i].depth = 4;
break;
case descriptor_Depth:
case descriptor_Composite:
/* unsupported */
break;
}
if (dpx->depth == 0 || dpx->depth > 4) {
if (verbose) printf("DPX: Unsupported image depth: %d\n", dpx->depth);
logImageClose(dpx);
return NULL;
}
dpx->element[i].bitsPerSample = header.imageHeader.element[i].bits_per_sample;
if (dpx->element[i].bitsPerSample != 1 && dpx->element[i].bitsPerSample != 8 &&
dpx->element[i].bitsPerSample != 10 && dpx->element[i].bitsPerSample != 12 &&
dpx->element[i].bitsPerSample != 16)
{
if (verbose) printf("DPX: Unsupported bitsPerSample for elements %d: %d\n", i, dpx->element[i].bitsPerSample);
logImageClose(dpx);
return NULL;
}
dpx->element[i].maxValue = powf(2, dpx->element[i].bitsPerSample) - 1.0f;
dpx->element[i].packing = swap_ushort(header.imageHeader.element[i].packing, dpx->isMSB);
if (dpx->element[i].packing > 2) {
if (verbose) printf("DPX: Unsupported packing for element %d: %d\n", i, dpx->element[i].packing);
logImageClose(dpx);
return NULL;
}
/* Sometimes, the offset is not set correctly in the header */
dpx->element[i].dataOffset = swap_uint(header.imageHeader.element[i].data_offset, dpx->isMSB);
if (dpx->element[i].dataOffset == 0 && dpx->numElements == 1)
dpx->element[i].dataOffset = swap_uint(header.fileHeader.offset, dpx->isMSB);
if (dpx->element[i].dataOffset == 0) {
if (verbose) printf("DPX: Image header is corrupted.\n");
logImageClose(dpx);
return NULL;
}
dpx->element[i].transfer = header.imageHeader.element[i].transfer;
/* if undefined, assign default */
dpx->element[i].refLowData = swap_uint(header.imageHeader.element[i].ref_low_data, dpx->isMSB);
dpx->element[i].refLowQuantity = swap_float(header.imageHeader.element[i].ref_low_quantity, dpx->isMSB);
dpx->element[i].refHighData = swap_uint(header.imageHeader.element[i].ref_high_data, dpx->isMSB);
dpx->element[i].refHighQuantity = swap_float(header.imageHeader.element[i].ref_high_quantity, dpx->isMSB);
switch (dpx->element[i].descriptor) {
case descriptor_Red:
case descriptor_Green:
case descriptor_Blue:
case descriptor_Alpha:
case descriptor_RGB:
case descriptor_RGBA:
case descriptor_ABGR:
if (dpx->element[i].refLowData == DPX_UNDEFINED_U32)
dpx->element[i].refLowData = 0;
if (dpx->element[i].refHighData == DPX_UNDEFINED_U32)
dpx->element[i].refHighData = (unsigned int)dpx->element[i].maxValue;
if (dpx->element[i].refLowQuantity == DPX_UNDEFINED_R32 || isnan(dpx->element[i].refLowQuantity))
dpx->element[i].refLowQuantity = 0.0f;
if (dpx->element[i].refHighQuantity == DPX_UNDEFINED_R32 || isnan(dpx->element[i].refHighQuantity)) {
if (dpx->element[i].transfer == transfer_PrintingDensity || dpx->element[i].transfer == transfer_Logarithmic)
dpx->element[i].refHighQuantity = 2.048f;
else
dpx->element[i].refHighQuantity = dpx->element[i].maxValue;
}
break;
case descriptor_Luminance:
case descriptor_Chrominance:
case descriptor_CbYCrY:
case descriptor_CbYCr:
case descriptor_CbYACrYA:
case descriptor_CbYCrA:
if (dpx->element[i].refLowData == DPX_UNDEFINED_U32)
dpx->element[i].refLowData = 16.0f / 255.0f * dpx->element[i].maxValue;
if (dpx->element[i].refHighData == DPX_UNDEFINED_U32)
dpx->element[i].refHighData = 235.0f / 255.0f * dpx->element[i].maxValue;
if (dpx->element[i].refLowQuantity == DPX_UNDEFINED_R32 || isnan(dpx->element[i].refLowQuantity))
dpx->element[i].refLowQuantity = 0.0f;
if (dpx->element[i].refHighQuantity == DPX_UNDEFINED_R32 || isnan(dpx->element[i].refHighQuantity))
dpx->element[i].refHighQuantity = 0.7f;
break;
default:
break;
}
}
dpx->referenceBlack = swap_float(header.televisionHeader.black_level, dpx->isMSB);
dpx->referenceWhite = swap_float(header.televisionHeader.white_level, dpx->isMSB);
dpx->gamma = swap_float(header.televisionHeader.gamma, dpx->isMSB);
if ((dpx->referenceBlack == DPX_UNDEFINED_R32 || isnan(dpx->referenceBlack)) ||
(dpx->referenceWhite == DPX_UNDEFINED_R32 || dpx->referenceWhite <= dpx->referenceBlack || isnan(dpx->referenceWhite)) ||
(dpx->gamma == DPX_UNDEFINED_R32 || dpx->gamma <= 0 || isnan(dpx->gamma)))
{
dpx->referenceBlack = 95.0f / 1023.0f * dpx->element[0].maxValue;
dpx->referenceWhite = 685.0f / 1023.0f * dpx->element[0].maxValue;
dpx->gamma = 1.7f;
}
if (verbose) {
printf("size %d x %d x %d elements\n", dpx->width, dpx->height, dpx->numElements);
for (i = 0; i < dpx->numElements; i++) {
printf(" Element %d:\n", i);
printf(" Bits per sample: %d\n", dpx->element[i].bitsPerSample);
printf(" Depth: %d\n", dpx->element[i].depth);
printf(" Transfer characteristics: %d\n", dpx->element[i].transfer);
printf(" Packing: %d\n", dpx->element[i].packing);
printf(" Descriptor: %d\n", dpx->element[i].descriptor);
printf(" Data offset: %d\n", dpx->element[i].dataOffset);
printf(" Reference low data: %u\n", dpx->element[i].refLowData);
printf(" Reference low quantity: %f\n", dpx->element[i].refLowQuantity);
printf(" Reference high data: %u\n", dpx->element[i].refHighData);
printf(" Reference high quantity: %f\n", dpx->element[i].refHighQuantity);
printf("\n");
}
printf("Gamma: %f\n", dpx->gamma);
printf("Reference black: %f\n", dpx->referenceBlack);
printf("Reference white: %f\n", dpx->referenceWhite);
printf("----------------------------\n");
}
return dpx;
}