Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/util/image_metadata.h

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+/* SPDX-FileCopyrightText: 2011-2026 Blender Authors
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include <cstdlib>
+
+#include <OpenImageIO/imageio.h>
+#include <OpenImageIO/string_view.h>
+
+#include "util/colorspace.h"
+#include "util/string.h"
+#include "util/types_image.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Image MetaData
+ *
+ * Information about the image that is available before the image pixels are loaded.
+ * This can be filled by an image loaded through OpenImageIO, but is also used for
+ * custom image loaders that may e.g. load an image from memory or auto generate it. */
+
+class ImageMetaData {
+ public:
+  /* Input image dimensions and format. */
+  int channels = 0;
+  int64_t width = 0, height = 0;
+  ImageDataType type = IMAGE_DATA_NUM_TYPES;
+
+  /* Input colorspace hints. */
+  string colorspace_file_hint;
+  const char *colorspace_file_format = "";
+
+  /* Input tile info. */
+  bool has_tiles_and_mipmaps = false;
+  uint32_t tile_size = 0;
+  float4 average_color = zero_float4();
+  bool tile_need_conform = true;
+
+  /* File is a valid tx file, but does not necessarily have mipmaps and tiles if it's
+   * small enough not to need them. */
+  bool is_tx_file = false;
+
+  /* Input NanoVDB data. */
+  int64_t nanovdb_byte_size = 0;
+  bool use_transform_3d = false;
+  Transform transform_3d = transform_identity();
+
+  /* Auto determined by finalize. */
+  ustring colorspace = u_colorspace_scene_linear;
+  bool is_compressible_as_srgb = false;
+  bool is_unassociated_alpha = false;
+  bool ignore_alpha = false;
+  bool is_channel_packed = false;
+
+  /* Constructor */
+  ImageMetaData();
+  bool operator==(const ImageMetaData &other) const;
+
+  /* Finalize image metadata, with optional user provided alpha type and colorspace. */
+  void finalize(const ImageAlphaType alpha_type = IMAGE_ALPHA_AUTO);
+
+  /* Image info. */
+  bool is_float() const;
+  bool is_half() const;
+  bool is_rgba() const;
+  TypeDesc typedesc() const;
+
+  /* Memory stats. */
+  size_t memory_size() const;
+  size_t pixel_memory_size() const;
+
+  /* OpenImageIO metadata and pixel loading. */
+  bool oiio_load_metadata(OIIO::string_view filepath, OIIO::ImageSpec *r_spec = nullptr);
+  bool oiio_load_pixels(OIIO::string_view filepath, void *pixels, const bool flip_y = true) const;
+
+  /* Change data type to float. */
+  void make_float();
+
+  /* Modify pixel data to conform to formats known to the kernel. That means 1 or 4 channels,
+   * a known ImageDataType, associated alpha and no NaN or infinite values. */
+  void conform_pixels(void *pixels) const;
+  void conform_pixels(void *pixels,
+                      const int64_t width,
+                      const int64_t height,
+                      const int64_t x_stride,
+                      const int64_t in_y_stride,
+                      const int64_t out_y_stride) const;
+
+ protected:
+  void detect_tiles(OIIO::ImageInput &input,
+                    const OIIO::ImageSpec &spec,
+                    OIIO::string_view filepath);
+};
+
+CCL_NAMESPACE_END