Differential D2887 Diff 9422 source/blender/imbuf/intern/openexr/openexr_api.cpp

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source/blender/imbuf/intern/openexr/openexr_api.cpp

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static void openexr_header_metadata_callback(void data, const char propname, char *prop, int UNUSED(len))		static void openexr_header_metadata_callback(void data, const char propname, char *prop, int UNUSED(len))
{		{
Header header = (Header )data;		Header header = (Header )data;
header->insert(propname, StringAttribute(prop));		header->insert(propname, StringAttribute(prop));
}		}


static bool imb_save_openexr_half(		static bool imb_save_openexr_half(
ImBuf ibuf, const char name, const int flags, const int totviews,		ImBuf ibuf, const char name, const int flags)
const char * (getview)(void base, int view_id),
ImBuf (getbuffer)(void *base, const int view_id))
{		{
const int channels = ibuf->channels;		const int channels = ibuf->channels;
const bool is_alpha = (channels >= 4) && (ibuf->planes == 32);		const bool is_alpha = (channels >= 4) && (ibuf->planes == 32);
const bool is_zbuf = (flags & IB_zbuffloat) && ibuf->zbuf_float != NULL; /* summarize */		const bool is_zbuf = (flags & IB_zbuffloat) && ibuf->zbuf_float != NULL; /* summarize */
const int width = ibuf->x;		const int width = ibuf->x;
const int height = ibuf->y;		const int height = ibuf->y;
const bool is_multiview = (flags & IB_multiview) && ibuf->userdata;

BLI_assert((!is_multiview) \|\| (getview && getbuffer));

std::vector <string> views;
int view_id;

try		try
{		{
Header header(width, height);		Header header(width, height);

openexr_header_compression(&header, ibuf->foptions.flag & OPENEXR_COMPRESS);		openexr_header_compression(&header, ibuf->foptions.flag & OPENEXR_COMPRESS);
openexr_header_metadata(&header, ibuf);		openexr_header_metadata(&header, ibuf);

/* create views when possible */		/* create channels */
for (view_id = 0; view_id < totviews; view_id ++)		header.channels().insert("R", Channel(HALF));
views.push_back(is_multiview ? getview(ibuf->userdata, view_id) : "");		header.channels().insert("G", Channel(HALF));
		header.channels().insert("B", Channel(HALF));
if (is_multiview)
addMultiView(header, views);

for (view_id = 0; view_id < totviews; view_id ++) {
header.channels().insert(insertViewName("R", views, view_id), Channel(HALF));
header.channels().insert(insertViewName("G", views, view_id), Channel(HALF));
header.channels().insert(insertViewName("B", views, view_id), Channel(HALF));
if (is_alpha)		if (is_alpha)
header.channels().insert(insertViewName("A", views, view_id), Channel(HALF));		header.channels().insert("A", Channel(HALF));
if (is_zbuf) // z we do as float always		if (is_zbuf) // z we do as float always
header.channels().insert(insertViewName("Z", views, view_id), Channel(Imf::FLOAT));		header.channels().insert("Z", Channel(Imf::FLOAT));
}

FrameBuffer frameBuffer;		FrameBuffer frameBuffer;

/* manually create ofstream, so we can handle utf-8 filepaths on windows */		/* manually create ofstream, so we can handle utf-8 filepaths on windows */
OFileStream file_stream(name);		OFileStream file_stream(name);
OutputFile file(file_stream, header);		OutputFile file(file_stream, header);

/* we store first everything in half array */		/* we store first everything in half array */
std::vector<RGBAZ> pixels(height * width * totviews);		std::vector<RGBAZ> pixels(height * width);
		RGBAZ *to = &pixels[0];
int xstride = sizeof(RGBAZ);		int xstride = sizeof(RGBAZ);
int ystride = xstride * width;		int ystride = xstride * width;

for (view_id = 0; view_id < totviews; view_id ++) {
ImBuf *view_ibuf = is_multiview ? getbuffer(ibuf->userdata, view_id) : ibuf;
const size_t offset = view_id * width * height;
RGBAZ *to = &pixels[offset];

/* TODO (dfelinto)
* In some cases we get NULL ibufs, it needs investigation, meanwhile prevent crash
* Multiview Render + Image Editor + OpenEXR + Multi-View
*/
if (view_ibuf == NULL) {
throw std::runtime_error(std::string("Missing data to write to ") + name);
}

/* indicate used buffers */		/* indicate used buffers */
frameBuffer.insert(insertViewName("R", views, view_id), Slice(HALF, (char *) &pixels[offset].r, xstride, ystride));		frameBuffer.insert("R", Slice(HALF, (char *) &to->r, xstride, ystride));
frameBuffer.insert(insertViewName("G", views, view_id), Slice(HALF, (char *) &pixels[offset].g, xstride, ystride));		frameBuffer.insert("G", Slice(HALF, (char *) &to->g, xstride, ystride));
frameBuffer.insert(insertViewName("B", views, view_id), Slice(HALF, (char *) &pixels[offset].b, xstride, ystride));		frameBuffer.insert("B", Slice(HALF, (char *) &to->b, xstride, ystride));
if (is_alpha)		if (is_alpha)
frameBuffer.insert(insertViewName("A", views, view_id), Slice(HALF, (char *) &pixels[offset].a, xstride, ystride));		frameBuffer.insert("A", Slice(HALF, (char *) &to->a, xstride, ystride));
if (is_zbuf)		if (is_zbuf)
frameBuffer.insert(insertViewName("Z", views, view_id), Slice(Imf::FLOAT, (char )(view_ibuf->zbuf_float + (height - 1) width),		frameBuffer.insert("Z", Slice(Imf::FLOAT, (char )(ibuf->zbuf_float + (height - 1) width),
sizeof(float), sizeof(float) * -width));		sizeof(float), sizeof(float) * -width));
if (view_ibuf->rect_float) {		if (ibuf->rect_float) {
float *from;		float *from;

for (int i = view_ibuf->y - 1; i >= 0; i--) {		for (int i = ibuf->y - 1; i >= 0; i--) {
from = view_ibuf->rect_float + channels * i * width;		from = ibuf->rect_float + channels * i * width;

for (int j = view_ibuf->x; j > 0; j--) {		for (int j = ibuf->x; j > 0; j--) {
to->r = from[0];		to->r = from[0];
to->g = (channels >= 2) ? from[1] : from[0];		to->g = (channels >= 2) ? from[1] : from[0];
to->b = (channels >= 3) ? from[2] : from[0];		to->b = (channels >= 3) ? from[2] : from[0];
to->a = (channels >= 4) ? from[3] : 1.0f;		to->a = (channels >= 4) ? from[3] : 1.0f;
to++; from += channels;		to++; from += channels;
}		}
}		}
}		}
else {		else {
unsigned char *from;		unsigned char *from;

for (int i = view_ibuf->y - 1; i >= 0; i--) {		for (int i = ibuf->y - 1; i >= 0; i--) {
from = (unsigned char )view_ibuf->rect + 4 i * width;		from = (unsigned char )ibuf->rect + 4 i * width;

for (int j = view_ibuf->x; j > 0; j--) {		for (int j = ibuf->x; j > 0; j--) {
to->r = srgb_to_linearrgb((float)from[0] / 255.0f);		to->r = srgb_to_linearrgb((float)from[0] / 255.0f);
to->g = srgb_to_linearrgb((float)from[1] / 255.0f);		to->g = srgb_to_linearrgb((float)from[1] / 255.0f);
to->b = srgb_to_linearrgb((float)from[2] / 255.0f);		to->b = srgb_to_linearrgb((float)from[2] / 255.0f);
to->a = channels >= 4 ? (float)from[3] / 255.0f : 1.0f;		to->a = channels >= 4 ? (float)from[3] / 255.0f : 1.0f;
to++; from += 4;		to++; from += 4;
}		}
}		}
}		}

if (is_multiview)
IMB_freeImBuf(view_ibuf);
}

exr_printf("OpenEXR-save: Writing OpenEXR file of height %d.\n", height);		exr_printf("OpenEXR-save: Writing OpenEXR file of height %d.\n", height);

file.setFrameBuffer(frameBuffer);		file.setFrameBuffer(frameBuffer);
file.writePixels(height);		file.writePixels(height);
}		}
catch (const std::exception& exc)		catch (const std::exception& exc)
{		{
printf("OpenEXR-save: ERROR: %s\n", exc.what());		printf("OpenEXR-save: ERROR: %s\n", exc.what());

return false;		return false;
}		}

return true;		return true;
}		}

static bool imb_save_openexr_float(		static bool imb_save_openexr_float(
ImBuf ibuf, const char name, const int flags, const int totviews,		ImBuf ibuf, const char name, const int flags)
const char * (getview)(void base, const int view_id),
ImBuf (getbuffer)(void *base, const int view_id))
{		{
const int channels = ibuf->channels;		const int channels = ibuf->channels;
const bool is_alpha = (channels >= 4) && (ibuf->planes == 32);		const bool is_alpha = (channels >= 4) && (ibuf->planes == 32);
const bool is_zbuf = (flags & IB_zbuffloat) && ibuf->zbuf_float != NULL; /* summarize */		const bool is_zbuf = (flags & IB_zbuffloat) && ibuf->zbuf_float != NULL; /* summarize */
const int width = ibuf->x;		const int width = ibuf->x;
const int height = ibuf->y;		const int height = ibuf->y;
const bool is_multiview = (flags & IB_multiview) && ibuf->userdata;

BLI_assert((!is_multiview) \|\| (getview && getbuffer));

std::vector <string> views;
int view_id;

try		try
{		{
Header header(width, height);		Header header(width, height);

openexr_header_compression(&header, ibuf->foptions.flag & OPENEXR_COMPRESS);		openexr_header_compression(&header, ibuf->foptions.flag & OPENEXR_COMPRESS);
openexr_header_metadata(&header, ibuf);		openexr_header_metadata(&header, ibuf);

/* create views when possible */		/* create channels */
for (view_id = 0; view_id < totviews; view_id ++)		header.channels().insert("R", Channel(Imf::FLOAT));
views.push_back(is_multiview ? getview(ibuf->userdata, view_id) : "");		header.channels().insert("G", Channel(Imf::FLOAT));
		header.channels().insert("B", Channel(Imf::FLOAT));
if (is_multiview)
addMultiView(header, views);

for (view_id = 0; view_id < totviews; view_id ++) {
header.channels().insert(insertViewName("R", views, view_id), Channel(Imf::FLOAT));
header.channels().insert(insertViewName("G", views, view_id), Channel(Imf::FLOAT));
header.channels().insert(insertViewName("B", views, view_id), Channel(Imf::FLOAT));
if (is_alpha)		if (is_alpha)
header.channels().insert(insertViewName("A", views, view_id), Channel(Imf::FLOAT));		header.channels().insert("A", Channel(Imf::FLOAT));
if (is_zbuf)		if (is_zbuf)
header.channels().insert(insertViewName("Z", views, view_id), Channel(Imf::FLOAT));		header.channels().insert("Z", Channel(Imf::FLOAT));
}

FrameBuffer frameBuffer;		FrameBuffer frameBuffer;

/* manually create ofstream, so we can handle utf-8 filepaths on windows */		/* manually create ofstream, so we can handle utf-8 filepaths on windows */
OFileStream file_stream(name);		OFileStream file_stream(name);
OutputFile file(file_stream, header);		OutputFile file(file_stream, header);

int xstride = sizeof(float) * channels;		int xstride = sizeof(float) * channels;
int ystride = -xstride * width;		int ystride = -xstride * width;

for (view_id = 0; view_id < totviews; view_id ++) {
float *rect[4] = {NULL, NULL, NULL, NULL};
ImBuf *view_ibuf = is_multiview ? getbuffer(ibuf->userdata, view_id) : ibuf;

/* TODO (dfelinto)
* In some cases we get NULL ibufs, it needs investigation, meanwhile prevent crash
* Multiview Render + Image Editor + OpenEXR + Multi-View
*/
if (view_ibuf == NULL) {
throw std::runtime_error(std::string("Missing data to write to ") + name);
}

/* last scanline, stride negative */		/* last scanline, stride negative */
rect[0] = view_ibuf->rect_float + channels * (height - 1) * width;		float *rect[4] = {NULL, NULL, NULL, NULL};
		rect[0] = ibuf->rect_float + channels * (height - 1) * width;
rect[1] = (channels >= 2) ? rect[0] + 1 : rect[0];		rect[1] = (channels >= 2) ? rect[0] + 1 : rect[0];
rect[2] = (channels >= 3) ? rect[0] + 2 : rect[0];		rect[2] = (channels >= 3) ? rect[0] + 2 : rect[0];
rect[3] = (channels >= 4) ? rect[0] + 3 : rect[0]; /* red as alpha, is this needed since alpha isn't written? */		rect[3] = (channels >= 4) ? rect[0] + 3 : rect[0]; /* red as alpha, is this needed since alpha isn't written? */

frameBuffer.insert(insertViewName("R", views, view_id), Slice(Imf::FLOAT, (char *)rect[0], xstride, ystride));		frameBuffer.insert("R", Slice(Imf::FLOAT, (char *)rect[0], xstride, ystride));
frameBuffer.insert(insertViewName("G", views, view_id), Slice(Imf::FLOAT, (char *)rect[1], xstride, ystride));		frameBuffer.insert("G", Slice(Imf::FLOAT, (char *)rect[1], xstride, ystride));
frameBuffer.insert(insertViewName("B", views, view_id), Slice(Imf::FLOAT, (char *)rect[2], xstride, ystride));		frameBuffer.insert("B", Slice(Imf::FLOAT, (char *)rect[2], xstride, ystride));
if (is_alpha)		if (is_alpha)
frameBuffer.insert(insertViewName("A", views, view_id), Slice(Imf::FLOAT, (char *)rect[3], xstride, ystride));		frameBuffer.insert("A", Slice(Imf::FLOAT, (char *)rect[3], xstride, ystride));
if (is_zbuf)		if (is_zbuf)
frameBuffer.insert(insertViewName("Z", views, view_id), Slice(Imf::FLOAT, (char ) (view_ibuf->zbuf_float + (height - 1) width),		frameBuffer.insert("Z", Slice(Imf::FLOAT, (char ) (ibuf->zbuf_float + (height - 1) width),
sizeof(float), sizeof(float) * -width));		sizeof(float), sizeof(float) * -width));

if (is_multiview)
IMB_freeImBuf(view_ibuf);
}
file.setFrameBuffer(frameBuffer);		file.setFrameBuffer(frameBuffer);
file.writePixels(height);		file.writePixels(height);
}		}
catch (const std::exception& exc)		catch (const std::exception& exc)
{		{
printf("OpenEXR-save: ERROR: %s\n", exc.what());		printf("OpenEXR-save: ERROR: %s\n", exc.what());
return false;		return false;
}		}

return true;		return true;
}		}

int imb_save_openexr(struct ImBuf ibuf, const char name, int flags)		int imb_save_openexr(struct ImBuf ibuf, const char name, int flags)
{		{
if (flags & IB_mem) {		if (flags & IB_mem) {
printf("OpenEXR-save: Create EXR in memory CURRENTLY NOT SUPPORTED !\n");		printf("OpenEXR-save: Create EXR in memory CURRENTLY NOT SUPPORTED !\n");
imb_addencodedbufferImBuf(ibuf);		imb_addencodedbufferImBuf(ibuf);
ibuf->encodedsize = 0;		ibuf->encodedsize = 0;
return(0);		return(0);
}		}

if (ibuf->foptions.flag & OPENEXR_HALF)		if (ibuf->foptions.flag & OPENEXR_HALF)
return (int) imb_save_openexr_half(ibuf, name, flags, 1, NULL, NULL);		return (int) imb_save_openexr_half(ibuf, name, flags);
else {
/* when no float rect, we save as half (16 bits is sufficient) */
if (ibuf->rect_float == NULL)
return (int) imb_save_openexr_half(ibuf, name, flags, 1, NULL, NULL);
else
return (int) imb_save_openexr_float(ibuf, name, flags, 1, NULL, NULL);
}
}

static bool imb_save_openexr_multiview(
ImBuf ibuf, const char name, const int flags, const int totviews,
const char (getview)(void *base, const int view_id),
ImBuf (getbuffer)(void *base, const int view_id))
{
if (flags & IB_mem) {
printf("OpenEXR-save: Create multiview EXR in memory CURRENTLY NOT SUPPORTED !\n");
imb_addencodedbufferImBuf(ibuf);
ibuf->encodedsize = 0;
return false;
}

if (ibuf->foptions.flag & OPENEXR_HALF)
return imb_save_openexr_half(ibuf, name, flags, totviews, getview, getbuffer);
else {		else {
/* when no float rect, we save as half (16 bits is sufficient) */		/* when no float rect, we save as half (16 bits is sufficient) */
if (ibuf->rect_float == NULL)		if (ibuf->rect_float == NULL)
return imb_save_openexr_half(ibuf, name, flags, totviews, getview, getbuffer);		return (int) imb_save_openexr_half(ibuf, name, flags);
else		else
return imb_save_openexr_float(ibuf, name, flags, totviews, getview, getbuffer);		return (int) imb_save_openexr_float(ibuf, name, flags);
}
}		}

/* Save single-layer multiview OpenEXR
* If we have more multiview formats in the future, the function below could be incorporated
* in our ImBuf write functions, meanwhile this is an OpenEXR special case only */
bool IMB_exr_multiview_save(
ImBuf ibuf, const char name, const int flags, const int totviews,
const char (getview)(void *base, const int view_id),
ImBuf (getbuffer)(void *base, const int view_id))
{
return imb_save_openexr_multiview(ibuf, name, flags, totviews, getview, getbuffer);
}		}

/* ******************* Nicer API, MultiLayer and with Tile file support ********************************** */		/* ******************* Nicer API, MultiLayer and with Tile file support ********************************** */

/* naming rules:		/* naming rules:
* - parse name from right to left		* - parse name from right to left
* - last character is channel ID, 1 char like 'A' 'R' 'G' 'B' 'X' 'Y' 'Z' 'W' 'U' 'V'		* - last character is channel ID, 1 char like 'A' 'R' 'G' 'B' 'X' 'Y' 'Z' 'W' 'U' 'V'
* - separated with a dot; the Pass name (like "Depth", "Color", "Diffuse" or "Combined")		* - separated with a dot; the Pass name (like "Depth", "Color", "Diffuse" or "Combined")
▲ Show 20 Lines • Show All 542 Lines • ▼ Show 20 Lines	try {
// printf("write tile %d %d\n", partx/data->tilex, party/data->tiley);		// printf("write tile %d %d\n", partx/data->tilex, party/data->tiley);
out.writeTile(partx / data->tilex, party / data->tiley, level);		out.writeTile(partx / data->tilex, party / data->tiley, level);
}		}
catch (const std::exception& exc) {		catch (const std::exception& exc) {
std::cerr << "OpenEXR-writeTile: ERROR: " << exc.what() << std::endl;		std::cerr << "OpenEXR-writeTile: ERROR: " << exc.what() << std::endl;
}		}
}		}

/* called only when handle has all views */
void IMB_exrmultiview_write_channels(void handle, const char viewname)
{
ExrHandle data = (ExrHandle )handle;
const int view_id = viewname ? imb_exr_get_multiView_id(*data->multiView, viewname) : -1;
int numparts = (view_id == -1 ? data->parts : view_id + 1);
std::vector <FrameBuffer> frameBuffers(numparts);
std::vector <OutputPart> outputParts;
ExrChannel *echan;
int i, part;

if (data->channels.first == NULL)
return;

exr_printf("\nIMB_exrmultiview_write_channels()\n");

for (echan = (ExrChannel *)data->channels.first; echan; echan = echan->next) {
if (view_id != -1 && echan->view_id != view_id)
continue;

part = (view_id == -1 ? echan->m->part_number : echan->view_id);

/* last scanline, stride negative */
float rect = echan->rect + echan->xstride (data->height - 1) * data->width;
frameBuffers[part].insert(echan->m->internal_name,
Slice(Imf::FLOAT,
(char *)rect,
echan->xstride * sizeof(float),
-echan->ystride * sizeof(float))
);
}

for (i = 0; i < numparts; i++) {
OutputPart out(*data->mpofile, i);
out.setFrameBuffer(frameBuffers[i]);
outputParts.push_back(out);
}

try {
for (i = 0; i < numparts; i++) {
if (view_id != -1 && i != view_id)
continue;

outputParts[i].writePixels(data->height);
}
}
catch (const std::exception& exc) {
std::cerr << "OpenEXR-write Multi Part: ERROR: " << exc.what() << std::endl;
}
}

void IMB_exr_read_channels(void *handle)		void IMB_exr_read_channels(void *handle)
{		{
ExrHandle data = (ExrHandle )handle;		ExrHandle data = (ExrHandle )handle;
ExrChannel *echan;		ExrChannel *echan;
int numparts = data->ifile->parts();		int numparts = data->ifile->parts();
std::vector<FrameBuffer> frameBuffers(numparts);		std::vector<FrameBuffer> frameBuffers(numparts);
std::vector<InputPart> inputParts;		std::vector<InputPart> inputParts;

▲ Show 20 Lines • Show All 70 Lines • ▼ Show 20 Lines	if (laybase) {
for (pass = (ExrPass *)lay->passes.first; pass; pass = pass->next) {		for (pass = (ExrPass *)lay->passes.first; pass; pass = pass->next) {
addpass(base, laybase, pass->internal_name, pass->rect, pass->totchan, pass->chan_id, pass->view);		addpass(base, laybase, pass->internal_name, pass->rect, pass->totchan, pass->chan_id, pass->view);
pass->rect = NULL;		pass->rect = NULL;
}		}
}		}
}		}
}		}

void IMB_exr_multiview_convert(void handle, void base,
void (addview)(void base, const char *str),
void (addbuffer)(void base, const char str, ImBuf ibuf, const int frame),
const int frame)
{
ExrHandle data = (ExrHandle )handle;
MultiPartInputFile *file = data->ifile;
ExrLayer *lay;
ExrPass *pass;
ImBuf *ibuf = NULL;
const bool is_alpha = exr_has_alpha(*file);
Box2i dw = file->header(0).dataWindow();
const size_t width = dw.max.x - dw.min.x + 1;
const size_t height = dw.max.y - dw.min.y + 1;
const bool is_depth = exr_has_zbuffer(*file);

/* add views to RenderResult */
for (StringVector::const_iterator i = data->multiView->begin(); i != data->multiView->end(); ++i) {
addview(base, (*i).c_str());
}

if (BLI_listbase_is_empty(&data->layers)) {
printf("cannot convert multiviews, no views in handle\n");
return;
}

/* there is one float/pass per layer (layer here is a view) */
BLI_assert(BLI_listbase_count_ex(&data->layers, 2) == 1);
lay = (ExrLayer *)data->layers.first;
for (pass = (ExrPass *)lay->passes.first; pass; pass = pass->next) {
if (STREQ(pass->chan_id, "RGB") \|\| STREQ(pass->chan_id, "RGBA")) {
ibuf = IMB_allocImBuf(width, height, is_alpha ? 32 : 24, IB_rectfloat);

if (!ibuf) {
printf("error creating multiview buffer\n");
return;
}

IMB_buffer_float_from_float(
ibuf->rect_float, pass->rect, pass->totchan,
IB_PROFILE_LINEAR_RGB, IB_PROFILE_LINEAR_RGB, false,
ibuf->x, ibuf->y, ibuf->x, ibuf->x);

if (hasXDensity(file->header(0))) {
ibuf->ppm[0] = xDensity(file->header(0)) * 39.3700787f;
ibuf->ppm[1] = ibuf->ppm[0] * (double)file->header(0).pixelAspectRatio();
}

if (is_depth) {
ExrPass *zpass;
for (zpass = (ExrPass *)lay->passes.first; zpass; zpass = zpass->next) {
if (STREQ(zpass->chan_id, "Z") && STREQ(zpass->view, pass->view)) {
addzbuffloatImBuf(ibuf);
memcpy(ibuf->zbuf_float, zpass->rect, sizeof(float) * ibuf->x * ibuf->y);
}
}
}

addbuffer(base, pass->view, ibuf, frame);
}
}
}

void IMB_exr_close(void *handle)		void IMB_exr_close(void *handle)
{		{
ExrHandle data = (ExrHandle )handle;		ExrHandle data = (ExrHandle )handle;
ExrLayer *lay;		ExrLayer *lay;
ExrPass *pass;		ExrPass *pass;
ExrChannel *chan;		ExrChannel *chan;

delete data->ifile;		delete data->ifile;
▲ Show 20 Lines • Show All 454 Lines • ▼ Show 20 Lines	else {
*r_singlelayer = true;		*r_singlelayer = true;
*r_multilayer = false;		*r_multilayer = false;
*r_multiview = false;		*r_multiview = false;
}		}

BLI_assert(r_singlelayer != r_multilayer);		BLI_assert(r_singlelayer != r_multilayer);
}		}

bool IMB_exr_has_singlelayer_multiview(void *handle)
{
ExrHandle data = (ExrHandle )handle;
MultiPartInputFile *file = data->ifile;
std::set <std::string> layerNames;
const ChannelList& channels = file->header(0).channels();
const StringAttribute *comments;

if (exr_has_multiview(*file) == false)
return false;

comments = file->header(0).findTypedAttribute<StringAttribute>("BlenderMultiChannel");

if (comments)
return false;

/* will not include empty layer names */
channels.layers(layerNames);

/* returns false if any layer differs from views list */
if (layerNames.size())
for (std::set<string>::iterator i = layerNames.begin(); i != layerNames.end(); i++)
if (imb_exr_get_multiView_id(data->multiView, i) == -1)
return false;

return true;
}

bool IMB_exr_has_multilayer(void *handle)
{
ExrHandle data = (ExrHandle )handle;
return imb_exr_is_multilayer_file(*data->ifile);
}

static bool exr_has_multiview(MultiPartInputFile& file)		static bool exr_has_multiview(MultiPartInputFile& file)
{		{
return hasMultiView(file.header(0));		return hasMultiView(file.header(0));
}		}

static bool exr_has_multipart_file(MultiPartInputFile& file)		static bool exr_has_multipart_file(MultiPartInputFile& file)
{		{
return file.parts() > 1;		return file.parts() > 1;
Show All 10 Lines	if (exr_has_multiview(file))
return true;		return true;

if (imb_exr_is_multilayer_file(file))		if (imb_exr_is_multilayer_file(file))
return true;		return true;

return false;		return false;
}		}

		bool IMB_exr_has_multilayer(void *handle)
		{
		ExrHandle data = (ExrHandle )handle;
		return imb_exr_is_multi(*data->ifile);
		}

struct ImBuf imb_load_openexr(const unsigned char mem, size_t size, int flags, char colorspace[IM_MAX_SPACE])		struct ImBuf imb_load_openexr(const unsigned char mem, size_t size, int flags, char colorspace[IM_MAX_SPACE])
{		{
struct ImBuf *ibuf = NULL;		struct ImBuf *ibuf = NULL;
Mem_IStream *membuf = NULL;		Mem_IStream *membuf = NULL;
MultiPartInputFile *file = NULL;		MultiPartInputFile *file = NULL;

if (imb_is_a_openexr(mem) == 0) return(NULL);		if (imb_is_a_openexr(mem) == 0) return(NULL);

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