Change path

vendor/OpenEXRCore/exr_chunkio.odin

@@ -0,0 +1,143 @@
+package vendor_openexr
+
+foreign import lib "OpenEXRCore-3_1.lib"
+
+import "core:c"
+
+/**
+ * Struct describing raw data information about a chunk.
+ *
+ * A chunk is the generic term for a pixel data block in an EXR file,
+ * as described in the OpenEXR File Layout documentation. This is
+ * common between all different forms of data that can be stored.
+ */
+chunk_info_t :: struct {
+	idx:     i32,
+
+	/** For tiles, this is the tilex; for scans it is the x. */
+	start_x: i32,
+	/** For tiles, this is the tiley; for scans it is the scanline y. */
+	start_y: i32,
+	height:  i32, /**< For this chunk. */
+	width:   i32,  /**< For this chunk. */
+
+	level_x: u8, /**< For tiled files. */
+	level_y: u8, /**< For tiled files. */
+
+	type: u8,
+	compression: u8,
+
+	data_offset:   u64,
+	packed_size:   u64,
+	unpacked_size: u64,
+
+	sample_count_data_offset: u64,
+	sample_count_table_size:  u64,
+}
+
+@(link_prefix="exr_", default_calling_convention="c")
+foreign lib {
+	read_scanline_chunk_info :: proc(ctxt: const_context_t, part_index: c.int, y: c.int, cinfo: ^chunk_info_t) -> result_t ---
+
+	read_tile_chunk_info :: proc(
+		ctxt:       const_context_t,
+		part_index: c.int,
+		tilex:      c.int,
+		tiley:      c.int,
+		levelx:     c.int,
+		levely:     c.int,
+		cinfo:      ^chunk_info_t) -> result_t ---
+
+	/** Read the packed data block for a chunk.
+	 *
+	 * This assumes that the buffer pointed to by @p packed_data is
+	 * large enough to hold the chunk block info packed_size bytes.
+	 */
+	read_chunk :: proc(
+		ctxt:        const_context_t,
+		part_index:  c.int,
+		cinfo:       ^chunk_info_t,
+		packed_data: rawptr) -> result_t ---
+
+	/**
+	 * Read chunk for deep data.
+	 *
+	 * This allows one to read the packed data, the sample count data, or both.
+	 * \c exr_read_chunk also works to read deep data packed data,
+	 * but this is a routine to get the sample count table and the packed
+	 * data in one go, or if you want to pre-read the sample count data,
+	 * you can get just that buffer.
+	 */
+	read_deep_chunk :: proc(
+		ctxt:        const_context_t,
+		part_index:  c.int,
+		cinfo:       ^chunk_info_t,
+		packed_data: rawptr,
+		sample_data: rawptr) -> result_t ---
+
+	/**************************************/
+
+	/** Initialize a \c chunk_info_t structure when encoding scanline
+	 * data (similar to read but does not do anything with a chunk
+	 * table).
+	 */
+	write_scanline_chunk_info :: proc(ctxt: context_t, part_index: c.int, y: c.int, cinfo: ^chunk_info_t) -> result_t ---
+
+	/** Initialize a \c chunk_info_t structure when encoding tiled data
+	 * (similar to read but does not do anything with a chunk table).
+	 */
+	write_tile_chunk_info :: proc(
+		ctxt:       context_t,
+		part_index: c.int,
+		tilex:      c.int,
+		tiley:      c.int,
+		levelx:     c.int,
+		levely:     c.int,
+		cinfo:      ^chunk_info_t) -> result_t ---
+
+	/**
+	 * @p y must the appropriate starting y for the specified chunk.
+	 */
+	write_scanline_chunk :: proc(
+		ctxt:        context_t,
+		part_index:  int,
+		y:           int,
+		packed_data: rawptr,
+		packed_size: u64) -> result_t ---
+
+	/**
+	 * @p y must the appropriate starting y for the specified chunk.
+	 */
+	write_deep_scanline_chunk :: proc(
+		ctxt:            context_t,
+		part_index:       c.int,
+		y:                c.int,
+		packed_data:      rawptr,
+		packed_size:      u64,
+		unpacked_size:    u64,
+		sample_data:      rawptr,
+		sample_data_size: u64) -> result_t ---
+
+	write_tile_chunk :: proc(
+		ctxt:        context_t,
+		part_index:  c.int,
+		tilex:       c.int,
+		tiley:       c.int,
+		levelx:      c.int,
+		levely:      c.int,
+		packed_data: rawptr,
+		packed_size: u64) -> result_t ---
+
+	write_deep_tile_chunk :: proc(
+		ctxt:             context_t,
+		part_index:       c.int,
+		tilex:            c.int,
+		tiley:            c.int,
+		levelx:           c.int,
+		levely:           c.int,
+		packed_data:      rawptr,
+		packed_size:      u64,
+		unpacked_size:    u64,
+		sample_data:      rawptr,
+		sample_data_size: u64) -> result_t ---
+}