TinyEXR: Sync with upstream master branch

Fixes #24247.

3 files changed, 179 insertions, 78 deletions

diff --git a/COPYRIGHT.txt b/COPYRIGHT.txt
index 894cd1a53a..2a1fe20477 100644
--- a/COPYRIGHT.txt
+++ b/COPYRIGHT.txt
@@ -382,7 +382,7 @@ License: Expat
 
 Files: ./thirdparty/tinyexr/
 Comment: TinyEXR
-Copyright: 2014-2017, Syoyo Fujita
+Copyright: 2014-2018, Syoyo Fujita
   2002, Industrial Light & Magic, a division of Lucas Digital Ltd. LLC
 License: BSD-3-clause
 
diff --git a/thirdparty/README.md b/thirdparty/README.md
index 55b693af96..f3bb595e03 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -503,7 +503,7 @@ changes are marked with `// -- GODOT --` comments.
 ## tinyexr
 
 - Upstream: https://github.com/syoyo/tinyexr
-- Version: git (2d5375f, 2018)
+- Version: git (5ae30aa, 2018)
 - License: BSD-3-Clause
 
 Files extracted from upstream source:
diff --git a/thirdparty/tinyexr/tinyexr.h b/thirdparty/tinyexr/tinyexr.h
index 990c8ee142..b3a7ee00c2 100644
--- a/thirdparty/tinyexr/tinyexr.h
+++ b/thirdparty/tinyexr/tinyexr.h
@@ -116,6 +116,8 @@ extern "C" {
 #define TINYEXR_ERROR_UNSUPPORTED_FORMAT (-7)
 #define TINYEXR_ERROR_INVALID_HEADER (-8)
 #define TINYEXR_ERROR_UNSUPPORTED_FEATURE (-9)
+#define TINYEXR_ERROR_CANT_WRITE_FILE (-10)
+#define TINYEXR_ERROR_SERIALZATION_FAILED (-11)
 
 // @note { OpenEXR file format: http://www.openexr.com/openexrfilelayout.pdf }
 
@@ -279,9 +281,12 @@ extern int LoadEXR(float **out_rgba, int *width, int *height,
 // Save image as fp16(HALF) format when `save_as_fp16` is positive non-zero
 // value.
 // Save image as fp32(FLOAT) format when `save_as_fp16` is 0.
+// Use ZIP compression by default.
+// Returns negative value and may set error string in `err` when there's an
+// error
 extern int SaveEXR(const float *data, const int width, const int height,
                    const int components, const int save_as_fp16,
-                   const char *filename);
+                   const char *filename, const char **err);
 
 // Initialize EXRHeader struct
 extern void InitEXRHeader(EXRHeader *exr_header);
@@ -400,9 +405,9 @@ extern int SaveEXRImageToFile(const EXRImage *image,
 
 // Saves multi-channel, single-frame OpenEXR image to a memory.
 // Image is compressed using EXRImage.compression value.
-// Return the number of bytes if succes.
-// Returns negative value and may set error string in `err` when there's an
-// error
+// Return the number of bytes if success.
+// Return zero and will set error string in `err` when there's an
+// error.
 // When there was an error message, Application must free `err` with
 // FreeEXRErrorMessage()
 extern size_t SaveEXRImageToMemory(const EXRImage *image,
@@ -524,15 +529,23 @@ namespace miniz {
 #if __has_warning("-Wcomma")
 #pragma clang diagnostic ignored "-Wcomma"
 #endif
+
 #if __has_warning("-Wmacro-redefined")
 #pragma clang diagnostic ignored "-Wmacro-redefined"
 #endif
+
 #if __has_warning("-Wcast-qual")
 #pragma clang diagnostic ignored "-Wcast-qual"
 #endif
+
 #if __has_warning("-Wzero-as-null-pointer-constant")
 #pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
 #endif
+
+#if __has_warning("-Wtautological-constant-compare")
+#pragma clang diagnostic ignored "-Wtautological-constant-compare"
+#endif
+
 #endif
 
 /* miniz.c v1.15 - public domain deflate/inflate, zlib-subset, ZIP
@@ -2518,10 +2531,10 @@ tinfl_status tinfl_decompress(tinfl_decompressor *r,
   tinfl_status status = TINFL_STATUS_FAILED;
   mz_uint32 num_bits, dist, counter, num_extra;
   tinfl_bit_buf_t bit_buf;
-  const mz_uint8 *pIn_buf_cur = pIn_buf_next, *const pIn_buf_end =
-                                                  pIn_buf_next + *pIn_buf_size;
-  mz_uint8 *pOut_buf_cur = pOut_buf_next, *const pOut_buf_end =
-                                              pOut_buf_next + *pOut_buf_size;
+  const mz_uint8 *pIn_buf_cur = pIn_buf_next,
+                 *const pIn_buf_end = pIn_buf_next + *pIn_buf_size;
+  mz_uint8 *pOut_buf_cur = pOut_buf_next,
+           *const pOut_buf_end = pOut_buf_next + *pOut_buf_size;
   size_t out_buf_size_mask =
              (decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)
                  ? (size_t)-1
@@ -2938,9 +2951,8 @@ void *tinfl_decompress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len,
     tinfl_status status = tinfl_decompress(
         &decomp, (const mz_uint8 *)pSrc_buf + src_buf_ofs, &src_buf_size,
         (mz_uint8 *)pBuf, pBuf ? (mz_uint8 *)pBuf + *pOut_len : NULL,
-        &dst_buf_size,
-        (flags & ~TINFL_FLAG_HAS_MORE_INPUT) |
-            TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF);
+        &dst_buf_size, (flags & ~TINFL_FLAG_HAS_MORE_INPUT) |
+                           TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF);
     if ((status < 0) || (status == TINFL_STATUS_NEEDS_MORE_INPUT)) {
       MZ_FREE(pBuf);
       *pOut_len = 0;
@@ -2993,8 +3005,9 @@ int tinfl_decompress_mem_to_callback(const void *pIn_buf, size_t *pIn_buf_size,
     tinfl_status status =
         tinfl_decompress(&decomp, (const mz_uint8 *)pIn_buf + in_buf_ofs,
                          &in_buf_size, pDict, pDict + dict_ofs, &dst_buf_size,
-                         (flags & ~(TINFL_FLAG_HAS_MORE_INPUT |
-                                    TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)));
+                         (flags &
+                          ~(TINFL_FLAG_HAS_MORE_INPUT |
+                            TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)));
     in_buf_ofs += in_buf_size;
     if ((dst_buf_size) &&
         (!(*pPut_buf_func)(pDict + dict_ofs, (int)dst_buf_size, pPut_buf_user)))
@@ -3119,9 +3132,7 @@ static const mz_uint8 s_tdefl_large_dist_extra[128] = {
 
 // Radix sorts tdefl_sym_freq[] array by 16-bit key m_key. Returns ptr to sorted
 // values.
-typedef struct {
-  mz_uint16 m_key, m_sym_index;
-} tdefl_sym_freq;
+typedef struct { mz_uint16 m_key, m_sym_index; } tdefl_sym_freq;
 static tdefl_sym_freq *tdefl_radix_sort_syms(mz_uint num_syms,
                                              tdefl_sym_freq *pSyms0,
                                              tdefl_sym_freq *pSyms1) {
@@ -5265,10 +5276,9 @@ mz_bool mz_zip_reader_file_stat(mz_zip_archive *pZip, mz_uint file_index,
   n = MZ_READ_LE16(p + MZ_ZIP_CDH_COMMENT_LEN_OFS);
   n = MZ_MIN(n, MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE - 1);
   pStat->m_comment_size = n;
-  memcpy(pStat->m_comment,
-         p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE +
-             MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS) +
-             MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS),
+  memcpy(pStat->m_comment, p + MZ_ZIP_CENTRAL_DIR_HEADER_SIZE +
+                               MZ_READ_LE16(p + MZ_ZIP_CDH_FILENAME_LEN_OFS) +
+                               MZ_READ_LE16(p + MZ_ZIP_CDH_EXTRA_LEN_OFS),
          n);
   pStat->m_comment[n] = '\0';
 
@@ -10087,9 +10097,10 @@ static bool DecodePixelData(/* out */ unsigned char **out_images,
             unsigned short *outLine =
                 reinterpret_cast<unsigned short *>(out_images[c]);
             if (line_order == 0) {
-              outLine += (y + v) * x_stride;
+              outLine += (size_t(y) + v) * size_t(x_stride);
             } else {
-              outLine += (height - 1 - (y + v)) * x_stride;
+              outLine +=
+                  (size_t(height) - 1 - (size_t(y) + v)) * size_t(x_stride);
             }
 
             for (int u = 0; u < width; u++) {
@@ -10105,9 +10116,10 @@ static bool DecodePixelData(/* out */ unsigned char **out_images,
           } else if (requested_pixel_types[c] == TINYEXR_PIXELTYPE_FLOAT) {
             float *outLine = reinterpret_cast<float *>(out_images[c]);
             if (line_order == 0) {
-              outLine += (y + v) * x_stride;
+              outLine += (size_t(y) + v) * size_t(x_stride);
             } else {
-              outLine += (height - 1 - (y + v)) * x_stride;
+              outLine +=
+                  (size_t(height) - 1 - (size_t(y) + v)) * size_t(x_stride);
             }
 
             if (reinterpret_cast<const unsigned char *>(line_ptr + width) >
@@ -10140,9 +10152,10 @@ static bool DecodePixelData(/* out */ unsigned char **out_images,
 
           float *outLine = reinterpret_cast<float *>(out_images[c]);
           if (line_order == 0) {
-            outLine += (y + v) * x_stride;
+            outLine += (size_t(y) + v) * size_t(x_stride);
           } else {
-            outLine += (height - 1 - (y + v)) * x_stride;
+            outLine +=
+                (size_t(height) - 1 - (size_t(y) + v)) * size_t(x_stride);
           }
 
           if (reinterpret_cast<const unsigned char *>(line_ptr + width) >
@@ -10167,9 +10180,10 @@ static bool DecodePixelData(/* out */ unsigned char **out_images,
           unsigned int *outLine =
               reinterpret_cast<unsigned int *>(out_images[c]);
           if (line_order == 0) {
-            outLine += (y + v) * x_stride;
+            outLine += (size_t(y) + v) * size_t(x_stride);
           } else {
-            outLine += (height - 1 - (y + v)) * x_stride;
+            outLine +=
+                (size_t(height) - 1 - (size_t(y) + v)) * size_t(x_stride);
           }
 
           for (int u = 0; u < width; u++) {
@@ -11133,21 +11147,53 @@ int LoadEXR(float **out_rgba, int *width, int *height, const char *filename,
     }
   }
 
-  if ((idxA == 0) && (idxR == -1) && (idxG == -1) && (idxB == -1)) {
-    // Alpha channel only.
+  if (exr_header.num_channels == 1) {
+    // Grayscale channel only.
 
-    if (exr_header.tiled) {
-      // todo.implement this
-    }
     (*out_rgba) = reinterpret_cast<float *>(
         malloc(4 * sizeof(float) * static_cast<size_t>(exr_image.width) *
                static_cast<size_t>(exr_image.height)));
-    for (int i = 0; i < exr_image.width * exr_image.height; i++) {
-      const float val = reinterpret_cast<float **>(exr_image.images)[0][i];
-      (*out_rgba)[4 * i + 0] = val;
-      (*out_rgba)[4 * i + 1] = val;
-      (*out_rgba)[4 * i + 2] = val;
-      (*out_rgba)[4 * i + 3] = val;
+
+    if (exr_header.tiled) {
+      // todo.implement this
+
+      for (int it = 0; it < exr_image.num_tiles; it++) {
+        for (int j = 0; j < exr_header.tile_size_y; j++) {
+          for (int i = 0; i < exr_header.tile_size_x; i++) {
+            const int ii =
+                exr_image.tiles[it].offset_x * exr_header.tile_size_x + i;
+            const int jj =
+                exr_image.tiles[it].offset_y * exr_header.tile_size_y + j;
+            const int idx = ii + jj * exr_image.width;
+
+            // out of region check.
+            if (ii >= exr_image.width) {
+              continue;
+            }
+            if (jj >= exr_image.height) {
+              continue;
+            }
+            const int srcIdx = i + j * exr_header.tile_size_x;
+            unsigned char **src = exr_image.tiles[it].images;
+            (*out_rgba)[4 * idx + 0] =
+                reinterpret_cast<float **>(src)[0][srcIdx];
+            (*out_rgba)[4 * idx + 1] =
+                reinterpret_cast<float **>(src)[0][srcIdx];
+            (*out_rgba)[4 * idx + 2] =
+                reinterpret_cast<float **>(src)[0][srcIdx];
+            (*out_rgba)[4 * idx + 3] =
+                reinterpret_cast<float **>(src)[0][srcIdx];
+          }
+        }
+      }
+    } else {
+      for (int i = 0; i < exr_image.width * exr_image.height; i++) {
+        const float val = reinterpret_cast<float **>(exr_image.images)[0][i];
+        (*out_rgba)[4 * i + 0] = val;
+        (*out_rgba)[4 * i + 1] = val;
+        (*out_rgba)[4 * i + 2] = val;
+        (*out_rgba)[4 * i + 3] = val;
+      }
     }
   } else {
     // Assume RGB(A)
@@ -11179,7 +11225,7 @@ int LoadEXR(float **out_rgba, int *width, int *height, const char *filename,
                static_cast<size_t>(exr_image.height)));
     if (exr_header.tiled) {
       for (int it = 0; it < exr_image.num_tiles; it++) {
-        for (int j = 0; j < exr_header.tile_size_y; j++)
+        for (int j = 0; j < exr_header.tile_size_y; j++) {
           for (int i = 0; i < exr_header.tile_size_x; i++) {
             const int ii =
                 exr_image.tiles[it].offset_x * exr_header.tile_size_x + i;
@@ -11209,6 +11255,7 @@ int LoadEXR(float **out_rgba, int *width, int *height, const char *filename,
               (*out_rgba)[4 * idx + 3] = 1.0;
             }
           }
+        }
       }
     } else {
       for (int i = 0; i < exr_image.width * exr_image.height; i++) {
@@ -11356,18 +11403,53 @@ int LoadEXRFromMemory(float **out_rgba, int *width, int *height,
       malloc(4 * sizeof(float) * static_cast<size_t>(exr_image.width) *
              static_cast<size_t>(exr_image.height)));
 
-  for (int i = 0; i < exr_image.width * exr_image.height; i++) {
-    (*out_rgba)[4 * i + 0] =
-        reinterpret_cast<float **>(exr_image.images)[idxR][i];
-    (*out_rgba)[4 * i + 1] =
-        reinterpret_cast<float **>(exr_image.images)[idxG][i];
-    (*out_rgba)[4 * i + 2] =
-        reinterpret_cast<float **>(exr_image.images)[idxB][i];
-    if (idxA != -1) {
-      (*out_rgba)[4 * i + 3] =
-          reinterpret_cast<float **>(exr_image.images)[idxA][i];
-    } else {
-      (*out_rgba)[4 * i + 3] = 1.0;
+  if (exr_header.tiled) {
+    for (int it = 0; it < exr_image.num_tiles; it++) {
+      for (int j = 0; j < exr_header.tile_size_y; j++)
+        for (int i = 0; i < exr_header.tile_size_x; i++) {
+          const int ii =
+              exr_image.tiles[it].offset_x * exr_header.tile_size_x + i;
+          const int jj =
+              exr_image.tiles[it].offset_y * exr_header.tile_size_y + j;
+          const int idx = ii + jj * exr_image.width;
+
+          // out of region check.
+          if (ii >= exr_image.width) {
+            continue;
+          }
+          if (jj >= exr_image.height) {
+            continue;
+          }
+          const int srcIdx = i + j * exr_header.tile_size_x;
+          unsigned char **src = exr_image.tiles[it].images;
+          (*out_rgba)[4 * idx + 0] =
+              reinterpret_cast<float **>(src)[idxR][srcIdx];
+          (*out_rgba)[4 * idx + 1] =
+              reinterpret_cast<float **>(src)[idxG][srcIdx];
+          (*out_rgba)[4 * idx + 2] =
+              reinterpret_cast<float **>(src)[idxB][srcIdx];
+          if (idxA != -1) {
+            (*out_rgba)[4 * idx + 3] =
+                reinterpret_cast<float **>(src)[idxA][srcIdx];
+          } else {
+            (*out_rgba)[4 * idx + 3] = 1.0;
+          }
+        }
+    }
+  } else {
+    for (int i = 0; i < exr_image.width * exr_image.height; i++) {
+      (*out_rgba)[4 * i + 0] =
+          reinterpret_cast<float **>(exr_image.images)[idxR][i];
+      (*out_rgba)[4 * i + 1] =
+          reinterpret_cast<float **>(exr_image.images)[idxG][i];
+      (*out_rgba)[4 * i + 2] =
+          reinterpret_cast<float **>(exr_image.images)[idxB][i];
+      if (idxA != -1) {
+        (*out_rgba)[4 * i + 3] =
+            reinterpret_cast<float **>(exr_image.images)[idxA][i];
+      } else {
+        (*out_rgba)[4 * i + 3] = 1.0;
+      }
     }
   }
 
@@ -11452,7 +11534,7 @@ size_t SaveEXRImageToMemory(const EXRImage *exr_image,
   if (exr_image == NULL || memory_out == NULL ||
       exr_header->compression_type < 0) {
     tinyexr::SetErrorMessage("Invalid argument for SaveEXRImageToMemory", err);
-    return 0;  // @fixme
+    return 0;
   }
 
 #if !TINYEXR_USE_PIZ
@@ -11623,8 +11705,6 @@ size_t SaveEXRImageToMemory(const EXRImage *exr_image,
           sizeof(
               tinyexr::tinyexr_int64);  // sizeof(header) + sizeof(offsetTable)
 
-  std::vector<unsigned char> data;
-
   std::vector<std::vector<unsigned char> > data_list(
       static_cast<size_t>(num_blocks));
   std::vector<size_t> channel_offset_list(
@@ -11863,9 +11943,9 @@ size_t SaveEXRImageToMemory(const EXRImage *exr_image,
     } else if (exr_header->compression_type == TINYEXR_COMPRESSIONTYPE_PIZ) {
 #if TINYEXR_USE_PIZ
       unsigned int bufLen =
-          1024 + static_cast<unsigned int>(
-                     1.2 * static_cast<unsigned int>(
-                               buf.size()));  // @fixme { compute good bound. }
+          8192 + static_cast<unsigned int>(
+                     2 * static_cast<unsigned int>(
+                             buf.size()));  // @fixme { compute good bound. }
       std::vector<unsigned char> block(bufLen);
       unsigned int outSize = static_cast<unsigned int>(block.size());
 
@@ -11924,13 +12004,12 @@ size_t SaveEXRImageToMemory(const EXRImage *exr_image,
   }  // omp parallel
 
   for (size_t i = 0; i < static_cast<size_t>(num_blocks); i++) {
-    data.insert(data.end(), data_list[i].begin(), data_list[i].end());
-
     offsets[i] = offset;
     tinyexr::swap8(reinterpret_cast<tinyexr::tinyexr_uint64 *>(&offsets[i]));
     offset += data_list[i].size();
   }
 
+  size_t totalSize = static_cast<size_t>(offset);
   {
     memory.insert(
         memory.end(), reinterpret_cast<unsigned char *>(&offsets.at(0)),
@@ -11938,14 +12017,21 @@ size_t SaveEXRImageToMemory(const EXRImage *exr_image,
             sizeof(tinyexr::tinyexr_uint64) * static_cast<size_t>(num_blocks));
   }
 
-  { memory.insert(memory.end(), data.begin(), data.end()); }
-
-  assert(memory.size() > 0);
+  if ( memory.size() == 0 ) {
+    tinyexr::SetErrorMessage("Output memory size is zero", err);
+    return 0;
+  }
 
-  (*memory_out) = static_cast<unsigned char *>(malloc(memory.size()));
+  (*memory_out) = static_cast<unsigned char *>(malloc(totalSize));
   memcpy((*memory_out), &memory.at(0), memory.size());
+  unsigned char *memory_ptr = *memory_out + memory.size();
 
-  return memory.size();  // OK
+  for (size_t i = 0; i < static_cast<size_t>(num_blocks); i++) {
+    memcpy(memory_ptr, &data_list[i].at(0), data_list[i].size());
+    memory_ptr += data_list[i].size();
+  }
+
+  return totalSize;  // OK
 }
 
 int SaveEXRImageToFile(const EXRImage *exr_image, const EXRHeader *exr_header,
@@ -11960,7 +12046,7 @@ int SaveEXRImageToFile(const EXRImage *exr_image, const EXRHeader *exr_header,
   if (exr_header->compression_type == TINYEXR_COMPRESSIONTYPE_PIZ) {
     tinyexr::SetErrorMessage("PIZ compression is not supported in this build",
                              err);
-    return 0;
+    return TINYEXR_ERROR_UNSUPPORTED_FEATURE;
   }
 #endif
 
@@ -11968,7 +12054,7 @@ int SaveEXRImageToFile(const EXRImage *exr_image, const EXRHeader *exr_header,
   if (exr_header->compression_type == TINYEXR_COMPRESSIONTYPE_ZFP) {
     tinyexr::SetErrorMessage("ZFP compression is not supported in this build",
                              err);
-    return 0;
+    return TINYEXR_ERROR_UNSUPPORTED_FEATURE;
   }
 #endif
 
@@ -11980,19 +12066,28 @@ int SaveEXRImageToFile(const EXRImage *exr_image, const EXRHeader *exr_header,
 #endif
   if (!fp) {
     tinyexr::SetErrorMessage("Cannot write a file", err);
-    return TINYEXR_ERROR_CANT_OPEN_FILE;
+    return TINYEXR_ERROR_CANT_WRITE_FILE;
   }
 
   unsigned char *mem = NULL;
   size_t mem_size = SaveEXRImageToMemory(exr_image, exr_header, &mem, err);
+  if (mem_size == 0) {
+    return TINYEXR_ERROR_SERIALZATION_FAILED;
+  }
 
+  size_t written_size = 0;
   if ((mem_size > 0) && mem) {
-    fwrite(mem, 1, mem_size, fp);
+    written_size = fwrite(mem, 1, mem_size, fp);
   }
   free(mem);
 
   fclose(fp);
 
+  if (written_size != mem_size) {
+    tinyexr::SetErrorMessage("Cannot write a file", err);
+    return TINYEXR_ERROR_CANT_WRITE_FILE;
+  }
+
   return TINYEXR_SUCCESS;
 }
 
@@ -12861,20 +12956,27 @@ int LoadEXRMultipartImageFromFile(EXRImage *exr_images,
 }
 
 int SaveEXR(const float *data, int width, int height, int components,
-            const int save_as_fp16, const char *outfilename) {
+            const int save_as_fp16, const char *outfilename, const char **err) {
   if ((components == 1) || components == 3 || components == 4) {
     // OK
   } else {
+    std::stringstream ss;
+    ss << "Unsupported component value : " << components << std::endl;
+
+    tinyexr::SetErrorMessage(ss.str(), err);
     return TINYEXR_ERROR_INVALID_ARGUMENT;
   }
 
-  // Assume at least 16x16 pixels.
-  if (width < 16) return TINYEXR_ERROR_INVALID_ARGUMENT;
-  if (height < 16) return TINYEXR_ERROR_INVALID_ARGUMENT;
-
   EXRHeader header;
   InitEXRHeader(&header);
 
+  if ((width < 16) && (height < 16)) {
+    // No compression for small image.
+    header.compression_type = TINYEXR_COMPRESSIONTYPE_NONE;
+  } else {
+    header.compression_type = TINYEXR_COMPRESSIONTYPE_ZIP;
+  }
+
   EXRImage image;
   InitEXRImage(&image);
 
@@ -12980,8 +13082,7 @@ int SaveEXR(const float *data, int width, int height, int components,
     }
   }
 
-  const char *err;
-  int ret = SaveEXRImageToFile(&image, &header, outfilename, &err);
+  int ret = SaveEXRImageToFile(&image, &header, outfilename, err);
   if (ret != TINYEXR_SUCCESS) {
     return ret;
   }