forked from bartvdbraak/blender
527 lines
14 KiB
C++
527 lines
14 KiB
C++
/*
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* Copyright 2011-2019 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "render/merge.h"
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#include "util/util_array.h"
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#include "util/util_map.h"
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#include "util/util_system.h"
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#include "util/util_time.h"
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#include "util/util_unique_ptr.h"
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#include <OpenImageIO/imageio.h>
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#include <OpenImageIO/filesystem.h>
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OIIO_NAMESPACE_USING
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CCL_NAMESPACE_BEGIN
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/* Merge Image Layer */
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enum MergeChannelOp {
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MERGE_CHANNEL_NOP,
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MERGE_CHANNEL_COPY,
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MERGE_CHANNEL_SUM,
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MERGE_CHANNEL_AVERAGE
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};
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struct MergeImagePass {
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/* Full channel name. */
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string channel_name;
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/* Channel format in the file. */
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TypeDesc format;
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/* Type of operation to perform when merging. */
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MergeChannelOp op;
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/* Offset of layer channels in input image. */
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int offset;
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/* Offset of layer channels in merged image. */
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int merge_offset;
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};
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struct MergeImageLayer {
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/* Layer name. */
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string name;
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/* Passes. */
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vector<MergeImagePass> passes;
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/* Sample amount that was used for rendering this layer. */
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int samples;
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};
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/* Merge Image */
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struct MergeImage {
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/* OIIO file handle. */
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unique_ptr<ImageInput> in;
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/* Image file path. */
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string filepath;
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/* Render layers. */
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vector<MergeImageLayer> layers;
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};
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/* Channel Parsing */
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static MergeChannelOp parse_channel_operation(const string& pass_name)
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{
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if(pass_name == "Depth" ||
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pass_name == "IndexMA" ||
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pass_name == "IndexOB" ||
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string_startswith(pass_name, "Crypto"))
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{
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return MERGE_CHANNEL_COPY;
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}
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else if(string_startswith(pass_name, "Debug BVH") ||
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string_startswith(pass_name, "Debug Ray") ||
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string_startswith(pass_name, "Debug Render Time"))
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{
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return MERGE_CHANNEL_SUM;
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}
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else {
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return MERGE_CHANNEL_AVERAGE;
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}
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}
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/* Splits in at its last dot, setting suffix to the part after the dot and
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* into the part before it. Returns whether a dot was found. */
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static bool split_last_dot(string &in, string &suffix)
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{
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size_t pos = in.rfind(".");
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if(pos == string::npos) {
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return false;
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}
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suffix = in.substr(pos+1);
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in = in.substr(0, pos);
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return true;
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}
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/* Separate channel names as generated by Blender.
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* Multiview format: RenderLayer.Pass.View.Channel
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* Otherwise: RenderLayer.Pass.Channel */
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static bool parse_channel_name(string name,
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string &renderlayer,
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string &pass,
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string &channel,
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bool multiview_channels)
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{
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if(!split_last_dot(name, channel)) {
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return false;
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}
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string view;
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if(multiview_channels && !split_last_dot(name, view)) {
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return false;
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}
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if(!split_last_dot(name, pass)) {
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return false;
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}
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renderlayer = name;
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if(multiview_channels) {
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renderlayer += "." + view;
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}
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return true;
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}
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static bool parse_channels(const ImageSpec &in_spec,
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vector<MergeImageLayer>& layers,
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string& error)
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{
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const ParamValue *multiview = in_spec.find_attribute("multiView");
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const bool multiview_channels = (multiview &&
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multiview->type().basetype == TypeDesc::STRING &&
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multiview->type().arraylen >= 2);
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layers.clear();
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/* Loop over all the channels in the file, parse their name and sort them
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* by RenderLayer.
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* Channels that can't be parsed are directly passed through to the output. */
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map<string, MergeImageLayer> file_layers;
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for(int i = 0; i < in_spec.nchannels; i++) {
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MergeImagePass pass;
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pass.channel_name = in_spec.channelnames[i];
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pass.format = (in_spec.channelformats.size() > 0) ? in_spec.channelformats[i] : in_spec.format;
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pass.offset = i;
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pass.merge_offset = i;
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string layername, passname, channelname;
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if(parse_channel_name(pass.channel_name, layername, passname, channelname, multiview_channels)) {
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/* Channer part of a render layer. */
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pass.op = parse_channel_operation(passname);
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}
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else {
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/* Other channels are added in unnamed layer. */
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layername = "";
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pass.op = parse_channel_operation(pass.channel_name);
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}
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file_layers[layername].passes.push_back(pass);
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}
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/* Loop over all detected RenderLayers, check whether they contain a full set of input channels.
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* Any channels that won't be processed internally are also passed through. */
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for(auto& i: file_layers) {
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const string& name = i.first;
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MergeImageLayer& layer = i.second;
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layer.name = name;
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layer.samples = 0;
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/* Determine number of samples from metadata. */
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if(layer.name == "") {
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layer.samples = 1;
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}
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else if(layer.samples < 1) {
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string sample_string = in_spec.get_string_attribute("cycles." + name + ".samples", "");
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if(sample_string != "") {
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if(!sscanf(sample_string.c_str(), "%d", &layer.samples)) {
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error = "Failed to parse samples metadata: " + sample_string;
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return false;
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}
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}
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}
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if(layer.samples < 1) {
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error = string_printf("No sample number specified in the file for layer %s or on the command line", name.c_str());
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return false;
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}
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layers.push_back(layer);
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}
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return true;
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}
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static bool open_images(const vector<string>& filepaths,
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vector<MergeImage>& images,
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string& error)
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{
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for(const string& filepath: filepaths) {
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unique_ptr<ImageInput> in(ImageInput::open(filepath));
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if(!in) {
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error = "Couldn't open file: " + filepath;
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return false;
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}
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MergeImage image;
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image.in = std::move(in);
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image.filepath = filepath;
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if(!parse_channels(image.in->spec(), image.layers, error)) {
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return false;
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}
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if(image.layers.size() == 0) {
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error = "Could not find a render layer for merging";
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return false;
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}
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if(image.in->spec().deep) {
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error = "Merging deep images not supported.";
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return false;
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}
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if(images.size() > 0) {
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const ImageSpec& base_spec = images[0].in->spec();
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const ImageSpec& spec = image.in->spec();
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if(base_spec.width != spec.width ||
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base_spec.height != spec.height ||
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base_spec.depth != spec.depth ||
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base_spec.format != spec.format ||
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base_spec.deep != spec.deep)
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{
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error = "Images do not have matching size and data layout.";
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return false;
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}
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}
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images.push_back(std::move(image));
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}
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return true;
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}
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static void merge_render_time(ImageSpec& spec,
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const vector<MergeImage>& images,
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const string& name,
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const bool average)
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{
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double time = 0.0;
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for(const MergeImage& image: images) {
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string time_str = image.in->spec().get_string_attribute(name, "");
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time += time_human_readable_to_seconds(time_str);
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}
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if(average) {
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time /= images.size();
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}
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spec.attribute(name, TypeDesc::STRING, time_human_readable_from_seconds(time));
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}
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static void merge_layer_render_time(ImageSpec& spec,
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const vector<MergeImage>& images,
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const string& layer_name,
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const string& time_name,
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const bool average)
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{
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string name = "cycles." + layer_name + "." + time_name;
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double time = 0.0;
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for(const MergeImage& image: images) {
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string time_str = image.in->spec().get_string_attribute(name, "");
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time += time_human_readable_to_seconds(time_str);
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}
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if(average) {
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time /= images.size();
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}
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spec.attribute(name, TypeDesc::STRING, time_human_readable_from_seconds(time));
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}
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static void merge_channels_metadata(vector<MergeImage>& images,
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ImageSpec& out_spec,
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vector<int>& channel_total_samples)
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{
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/* Based on first image. */
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out_spec = images[0].in->spec();
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/* Merge channels and compute offsets. */
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out_spec.nchannels = 0;
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out_spec.channelformats.clear();
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out_spec.channelnames.clear();
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for(MergeImage& image: images) {
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for(MergeImageLayer& layer: image.layers) {
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for(MergeImagePass& pass: layer.passes) {
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/* Test if matching channel already exists in merged image. */
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bool found = false;
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for(size_t i = 0; i < out_spec.nchannels; i++) {
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if(pass.channel_name == out_spec.channelnames[i]) {
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pass.merge_offset = i;
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channel_total_samples[i] += layer.samples;
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/* First image wins for channels that can't be averaged or summed. */
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if (pass.op == MERGE_CHANNEL_COPY) {
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pass.op = MERGE_CHANNEL_NOP;
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}
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found = true;
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break;
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}
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}
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if(!found) {
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/* Add new channel. */
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pass.merge_offset = out_spec.nchannels;
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channel_total_samples.push_back(layer.samples);
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out_spec.channelnames.push_back(pass.channel_name);
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out_spec.channelformats.push_back(pass.format);
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out_spec.nchannels++;
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}
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}
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}
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}
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/* Merge metadata. */
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merge_render_time(out_spec, images, "RenderTime", false);
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map<string, int> layer_num_samples;
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for(MergeImage& image: images) {
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for(MergeImageLayer& layer: image.layers) {
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if(layer.name != "") {
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layer_num_samples[layer.name] += layer.samples;
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}
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}
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}
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for(const auto& i: layer_num_samples) {
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string name = "cycles." + i.first + ".samples";
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out_spec.attribute(name, TypeDesc::STRING, string_printf("%d", i.second));
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merge_layer_render_time(out_spec, images, i.first, "total_time", false);
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merge_layer_render_time(out_spec, images, i.first, "render_time", false);
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merge_layer_render_time(out_spec, images, i.first, "synchronization_time", true);
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}
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}
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static void alloc_pixels(const ImageSpec& spec, array<float>& pixels)
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{
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const size_t width = spec.width;
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const size_t height = spec.height;
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const size_t num_channels = spec.nchannels;
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const size_t num_pixels = (size_t)width * (size_t)height;
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pixels.resize(num_pixels * num_channels);
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}
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static bool merge_pixels(const vector<MergeImage>& images,
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const ImageSpec& out_spec,
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const vector<int>& channel_total_samples,
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array<float>& out_pixels,
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string& error)
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{
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alloc_pixels(out_spec, out_pixels);
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memset(out_pixels.data(), 0, out_pixels.size() * sizeof(float));
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for(const MergeImage& image: images) {
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/* Read all channels into buffer. Reading all channels at once is
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* faster than individually due to interleaved EXR channel storage. */
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array<float> pixels;
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alloc_pixels(image.in->spec(), pixels);
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if(!image.in->read_image(TypeDesc::FLOAT, pixels.data())) {
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error = "Failed to read image: " + image.filepath;
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return false;
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}
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for(size_t li = 0; li < image.layers.size(); li++) {
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const MergeImageLayer& layer = image.layers[li];
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const size_t stride = image.in->spec().nchannels;
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const size_t out_stride = out_spec.nchannels;
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const size_t num_pixels = pixels.size();
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for(const MergeImagePass& pass: layer.passes) {
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size_t offset = pass.offset;
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size_t out_offset = pass.merge_offset;
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switch(pass.op) {
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case MERGE_CHANNEL_NOP:
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break;
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case MERGE_CHANNEL_COPY:
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for(; offset < num_pixels; offset += stride, out_offset += out_stride) {
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out_pixels[out_offset] = pixels[offset];
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}
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break;
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case MERGE_CHANNEL_SUM:
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for(; offset < num_pixels; offset += stride, out_offset += out_stride) {
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out_pixels[out_offset] += pixels[offset];
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}
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break;
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case MERGE_CHANNEL_AVERAGE:
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/* Weights based on sample metadata. Per channel since not
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* all files are guaranteed to have the same channels. */
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const int total_samples = channel_total_samples[out_offset];
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const float t = (float)layer.samples / (float)total_samples;
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for(; offset < num_pixels; offset += stride, out_offset += out_stride) {
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out_pixels[out_offset] += t * pixels[offset];
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}
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break;
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}
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}
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}
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}
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return true;
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}
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static bool save_output(const string& filepath,
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const ImageSpec& spec,
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const array<float>& pixels,
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string& error)
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{
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/* Write to temporary file path, so we merge images in place and don't
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* risk destroying files when something goes wrong in file saving. */
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string extension = OIIO::Filesystem::extension(filepath);
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string unique_name = ".merge-tmp-" + OIIO::Filesystem::unique_path();
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string tmp_filepath = filepath + unique_name + extension;
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unique_ptr<ImageOutput> out(ImageOutput::create(tmp_filepath));
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if(!out) {
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error = "Failed to open temporary file " + tmp_filepath + " for writing";
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return false;
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}
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/* Open temporary file and write image buffers. */
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if(!out->open(tmp_filepath, spec)) {
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error = "Failed to open file " + tmp_filepath + " for writing: " + out->geterror();
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return false;
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}
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bool ok = true;
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if(!out->write_image(TypeDesc::FLOAT, pixels.data())) {
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error = "Failed to write to file " + tmp_filepath + ": " + out->geterror();
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ok = false;
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}
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if(!out->close()) {
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error = "Failed to save to file " + tmp_filepath + ": " + out->geterror();
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ok = false;
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}
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out.reset();
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/* Copy temporary file to outputput filepath. */
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string rename_error;
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if(ok && !OIIO::Filesystem::rename(tmp_filepath, filepath, rename_error)) {
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error = "Failed to move merged image to " + filepath + ": " + rename_error;
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ok = false;
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}
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if(!ok) {
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OIIO::Filesystem::remove(tmp_filepath);
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}
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return ok;
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}
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/* Image Merger */
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ImageMerger::ImageMerger()
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{
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}
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bool ImageMerger::run()
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{
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if(input.empty()) {
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error = "No input file paths specified.";
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return false;
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}
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if(output.empty()) {
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error = "No output file path specified.";
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return false;
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}
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/* Open images and verify they have matching layout. */
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vector<MergeImage> images;
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if(!open_images(input, images, error)) {
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return false;
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}
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/* Merge metadata and setup channels and offsets. */
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ImageSpec out_spec;
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vector<int> channel_total_samples;
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merge_channels_metadata(images, out_spec, channel_total_samples);
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/* Merge pixels. */
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array<float> out_pixels;
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if(!merge_pixels(images, out_spec, channel_total_samples, out_pixels, error)) {
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return false;
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}
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/* We don't need input anymore at this point, and will possibly
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* overwrite the same file. */
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images.clear();
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/* Save output file. */
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return save_output(output, out_spec, out_pixels, error);
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}
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CCL_NAMESPACE_END
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