update TODO file

1 files changed, 89 insertions, 20 deletions

diff --git a/TODO b/TODO
index ed3adff6..0449c1d5 100644
--- a/TODO
+++ b/TODO
@@ -3,7 +3,6 @@ heh. bug in pdfselect on compressed object streams. gc takes forever, no objects
 lazy nametree
 lazy pagetree
 
-cmap one-to-many mapping
 builtin standard cmap files (?)
 put unicode strings in text object, not font (a la metro)
 
@@ -18,8 +17,6 @@ image rescale to exact size instead of by integer quantas
 
 public / private api
 
-top-level "driver" architecture (metro/pdf/whatever input)
-
 fix the shading code:
 	3 levels of detail patch mesh (quad, patch, tensor)
 	subdivide to triangles on the fly
@@ -27,14 +24,95 @@ fix the shading code:
 	reuse more code in the parsing
 	error cleanup
 
-think about rewriting file stream api (as the ultimate STDIO replacement):
-	use function pointers?
-	dont use pipeline filter?
-		memoryfile
-		diskfile
-		filterfile -> (filters data from another file)
+--- WORLD ---
+
+the fitz world is:
+	the set of resources:
+		trees, fonts, images, shades, colorspaces
+	the list of pages:
+		references to tree resources
+	opaque / transparent / invisible ?
+
+input device drivers create a fitz world from a document
+	readps -- use ghostscript
+	readpdf -- use mupdf
+	readmetro -- use samus
+
+	the mapping from file -> pages and resources
+		internal to the driver, nothing fitz cares or knows about
+		should be lazy -- loaded on an as-needed basis
+		should be reference counted -- can free and reload resources
+
+	minimal api (that works for *all* input drivers)
+		open(file)
+		close()
+		nextpage()
+
+	extended api (that may or may not work optimally)
+		countpages()
+		loadpage(number)
+
+output drivers take a fitz world and produce whatever
+	raster
+	writeps
+	writepdf
+	writemetro
+
+--- WORLD API ---
+
+Fitz World APIs
+
+Trees:
+	fz_tree
+
+	fz_node with subclasses
+
+		leafs:
+			fz_solidnode
+			fz_imagenode
+			fz_shadenode
+			fz_pathnode
+			fz_textnode
+
+		branches:
+			fz_transformnode
+			fz_overnode
+			fz_masknode
+			fz_blendnode		# for pdf 1.4 and pcl rops
+			fz_linknode
+			fz_metanode
 
----
+	construction api
+	navigation api
+
+Colorspaces:
+	fz_colorspace
+		fz_devicecolor	(gray, rgb, cmyk)
+		fz_iccprofile	(icc profile colorspace)
+		fz_separation	(how do we do alternate tint functions?)
+
+Images:
+	fz_image
+		fz_jpegimage	# jpeg-compressed
+		fz_tileimage	# 1,8,16 bit image chopped into tiles
+
+		...or...
+		fz_monoimage	# 1-bit image
+		fz_byteimage	# 8-bit image
+		fz_wordimage	# 16-bit image
+
+Shades:
+	fz_shade
+		mesh of quads, patches, tensors
+
+Fonts:
+	fz_font
+		fz_t3font	# sub-trees define glyphs
+		fz_psfont	# cff postscript font
+		fz_ttfont	# truetype font
+
+
+--- OLD ---
 
 immediate plan:
 
@@ -62,10 +140,6 @@ immediate plan:
 	- go through spec and check all features!
 	- altivec optimize
 
----
-
-std rsrc fmt (v3)
-
 transparency (v2)
 	- everything!
 
@@ -84,7 +158,6 @@ image rendering (v2)
 rendering
 	- fix glyphcache evictlast
 	- bbox culling per glyph
-	- font focus
 	- render cache (link-nodes and scaled images and colorspaced shades)
 
 fz_optimizetree()
@@ -92,16 +165,12 @@ fz_optimizetree()
 	- concatenate chained transforms
 	- remove identity transforms
 
----
-
 for filters:
-
 	validate ahxd pushback
 	go through eof responsibility
 	be more defensive of api user errors
-	flate needin/needout
-
 	jbig2 rewrite
 	dctencode params
 	dctdecode app marker
+	jpxd rewrite (or do special trick to load into image directly)