Remove outdated PNG save helpers

core/image/png/helpers.odin

@@ -397,131 +397,3 @@ exif :: proc(c: image.PNG_Chunk) -> (res: Exif, ok: bool) {
 */
 
 compute_buffer_size :: image.compute_buffer_size
-
-/*
-	PNG save helpers
-*/
-
-when false {
-
-	make_chunk :: proc(c: any, t: Chunk_Type) -> (res: Chunk) {
-
-		data: []u8
-		if v, ok := c.([]u8); ok {
-			data = v
-		} else {
-			data = mem.any_to_bytes(c)
-		}
-
-		res.header.length = u32be(len(data))
-		res.header.type   = t
-		res.data   = data
-
-		// CRC the type
-		crc    := hash.crc32(mem.any_to_bytes(res.header.type))
-		// Extend the CRC with the data
-		res.crc = u32be(hash.crc32(data, crc))
-		return
-	}
-
-	write_chunk :: proc(fd: os.Handle, chunk: Chunk) {
-		c := chunk
-		// Write length + type
-		os.write_ptr(fd, &c.header, 8)
-		// Write data
-		os.write_ptr(fd, mem.raw_data(c.data), int(c.header.length))
-		// Write CRC32
-		os.write_ptr(fd, &c.crc, 4)
-	}
-
-	write_image_as_png :: proc(filename: string, image: Image) -> (err: Error) {
-		profiler.timed_proc()
-		using image
-		using os
-		flags: int = O_WRONLY|O_CREATE|O_TRUNC
-
-		if len(image.pixels) == 0 || len(image.pixels) < image.width * image.height * int(image.channels) {
-			return .Invalid_Image_Dimensions
-		}
-
-		mode: int = 0
-		when ODIN_OS == .Linux || ODIN_OS == .Darwin {
-			// NOTE(justasd): 644 (owner read, write; group read; others read)
-			mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
-		}
-
-		fd, fderr := open(filename, flags, mode)
-		if fderr != nil {
-			return .Cannot_Open_File
-		}
-		defer close(fd)
-
-		magic := Signature
-
-		write_ptr(fd, &magic, 8)
-
-		ihdr := IHDR{
-			width              = u32be(width),
-			height             = u32be(height),
-			bit_depth          = depth,
-			compression_method = 0,
-			filter_method      = 0,
-			interlace_method   = .None,
-		}
-
-		switch channels {
-		case 1: ihdr.color_type = Color_Type{}
-		case 2: ihdr.color_type = Color_Type{.Alpha}
-		case 3: ihdr.color_type = Color_Type{.Color}
-		case 4: ihdr.color_type = Color_Type{.Color, .Alpha}
-		case:// Unhandled
-			return .Unknown_Color_Type
-		}
-		h := make_chunk(ihdr, .IHDR)
-		write_chunk(fd, h)
-
-		bytes_needed := width * height * int(channels) + height
-		filter_bytes := mem.make_dynamic_array_len_cap([dynamic]u8, bytes_needed, bytes_needed, context.allocator)
-		defer delete(filter_bytes)
-
-		i := 0; j := 0
-		// Add a filter byte 0 per pixel row
-		for y := 0; y < height; y += 1 {
-			filter_bytes[j] = 0; j += 1
-			for x := 0; x < width; x += 1 {
-				for z := 0; z < channels; z += 1 {
-					filter_bytes[j+z] = image.pixels[i+z]
-				}
-				i += channels; j += channels
-			}
-		}
-		assert(j == bytes_needed)
-
-		a: []u8 = filter_bytes[:]
-
-		out_buf: ^[dynamic]u8
-		defer free(out_buf)
-
-		ctx := zlib.ZLIB_Context{
-			in_buf  = &a,
-			out_buf = out_buf,
-		}
-		err = zlib.write_zlib_stream_from_memory(&ctx)
-
-		b: []u8
-		if err == nil {
-			b = ctx.out_buf[:]
-		} else {
-			return err
-		}
-
-		idat := make_chunk(b, .IDAT)
-
-		write_chunk(fd, idat)
-
-		iend := make_chunk([]u8{}, .IEND)
-		write_chunk(fd, iend)
-
-		return nil
-	}
-}