1 files changed, 110 insertions, 0 deletions
diff --git a/source/blender/imbuf/IMB_openexr.h b/source/blender/imbuf/IMB_openexr.h
new file mode 100644
index 00000000000..a41053b99bf
--- /dev/null
+++ b/source/blender/imbuf/IMB_openexr.h
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2006 Blender Foundation. All rights reserved. */
+
+/** \file
+ * \ingroup imbuf
+ */
+
+#pragma once
+
+/* API for reading and writing multilayer EXR files. */
+
+/* XXX layer+pass name max 64? */
+/* This api also supports max 8 channels per pass now. easy to fix! */
+#define EXR_LAY_MAXNAME 64
+#define EXR_PASS_MAXNAME 64
+#define EXR_VIEW_MAXNAME 64
+#define EXR_TOT_MAXNAME 64
+#define EXR_PASS_MAXCHAN 24
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct StampData;
+
+void *IMB_exr_get_handle(void);
+void *IMB_exr_get_handle_name(const char *name);
+
+/**
+ * Adds flattened #ExrChannel's
+ * `xstride`, `ystride` and `rect` can be done in set_channel too, for tile writing.
+ * \param passname: Does not include view.
+ */
+void IMB_exr_add_channel(void *handle,
+                         const char *layname,
+                         const char *passname,
+                         const char *view,
+                         int xstride,
+                         int ystride,
+                         float *rect,
+                         bool use_half_float);
+
+/**
+ * Read from file.
+ */
+bool IMB_exr_begin_read(
+    void *handle, const char *filename, int *width, int *height, bool parse_channels);
+/**
+ * Used for output files (from #RenderResult) (single and multi-layer, single and multi-view).
+ */
+bool IMB_exr_begin_write(void *handle,
+                         const char *filename,
+                         int width,
+                         int height,
+                         int compress,
+                         const struct StampData *stamp);
+/**
+ * Only used for writing temp. render results (not image files)
+ * (FSA and Save Buffers).
+ */
+void IMB_exrtile_begin_write(
+    void *handle, const char *filename, int mipmap, int width, int height, int tilex, int tiley);
+
+/**
+ * Still clumsy name handling, layers/channels can be ordered as list in list later.
+ *
+ * \param passname: Here is the raw channel name without the layer.
+ */
+void IMB_exr_set_channel(void *handle,
+                         const char *layname,
+                         const char *passname,
+                         int xstride,
+                         int ystride,
+                         float *rect);
+float *IMB_exr_channel_rect(void *handle,
+                            const char *layname,
+                            const char *passname,
+                            const char *view);
+
+void IMB_exr_read_channels(void *handle);
+void IMB_exr_write_channels(void *handle);
+/**
+ * Temporary function, used for FSA and Save Buffers.
+ * called once per `tile * view`.
+ */
+void IMB_exrtile_write_channels(
+    void *handle, int partx, int party, int level, const char *viewname, bool empty);
+void IMB_exr_clear_channels(void *handle);
+
+void IMB_exr_multilayer_convert(void *handle,
+                                void *base,
+                                void *(*addview)(void *base, const char *str),
+                                void *(*addlayer)(void *base, const char *str),
+                                void (*addpass)(void *base,
+                                                void *lay,
+                                                const char *str,
+                                                float *rect,
+                                                int totchan,
+                                                const char *chan_id,
+                                                const char *view));
+
+void IMB_exr_close(void *handle);
+
+void IMB_exr_add_view(void *handle, const char *name);
+
+bool IMB_exr_has_multilayer(void *handle);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif