use new FFI based mupdf API

This will use the new API where the Lua/C interface was used before
and also drop usage of mupdfimg wrapper which is now implemented
within the mupdf interface

base

@@ -1 +1 @@
-Subproject commit a4191d33665e4a3c2a63b9d243913a12c9d7a890
+Subproject commit bb2f598cfa2aebf565ae5947293c9cfe06021183

frontend/document/credocument.lua

@@ -3,7 +3,6 @@ local Document = require("document/document")
 local Configurable = require("configurable")
 local Blitbuffer = require("ffi/blitbuffer")
 local lfs = require("libs/libkoreader-lfs")
-local Image = require("ffi/mupdfimg")
 local Geom = require("ui/geometry")
 local Device = require("ui/device")
 local Screen = require("ui/screen")
@@ -148,7 +147,8 @@ function CreDocument:getCoverPageImage()
     self:loadDocument()
     local data, size = self._document:getCoverPageImageData()
     if data and size then
-        local image = Image:fromData(data, size)
+        local Mupdf = require("ffi/mupdf")
+        local image = Mupdf:renderImage(data, size)
         ffi.C.free(data)
         return image
     end

frontend/document/pdfdocument.lua

@@ -5,56 +5,20 @@ local Document = require("document/document")
 local Configurable = require("configurable")
 local DrawContext = require("ffi/drawcontext")
 local DEBUG = require("dbg")
-local ffi = require("ffi")
-ffi.cdef[[
-typedef struct fz_point_s fz_point;
-struct fz_point_s {
-    float x, y;
-};
-typedef enum {
-    FZ_ANNOT_TEXT,
-    FZ_ANNOT_LINK,
-    FZ_ANNOT_FREETEXT,
-    FZ_ANNOT_LINE,
-    FZ_ANNOT_SQUARE,
-    FZ_ANNOT_CIRCLE,
-    FZ_ANNOT_POLYGON,
-    FZ_ANNOT_POLYLINE,
-    FZ_ANNOT_HIGHLIGHT,
-    FZ_ANNOT_UNDERLINE,
-    FZ_ANNOT_SQUIGGLY,
-    FZ_ANNOT_STRIKEOUT,
-    FZ_ANNOT_STAMP,
-    FZ_ANNOT_CARET,
-    FZ_ANNOT_INK,
-    FZ_ANNOT_POPUP,
-    FZ_ANNOT_FILEATTACHMENT,
-    FZ_ANNOT_SOUND,
-    FZ_ANNOT_MOVIE,
-    FZ_ANNOT_WIDGET,
-    FZ_ANNOT_SCREEN,
-    FZ_ANNOT_PRINTERMARK,
-    FZ_ANNOT_TRAPNET,
-    FZ_ANNOT_WATERMARK,
-    FZ_ANNOT_3D
-} fz_annot_type;
-]]
 
 local PdfDocument = Document:new{
     _document = false,
-    -- muPDF manages its own additional cache
-    mupdf_cache_size = 5 * 1024 * 1024,
     dc_null = DrawContext.new(),
     options = KoptOptions,
     koptinterface = nil,
 }
 
 function PdfDocument:init()
-    local pdf = require("libs/libkoreader-pdf")
+    local pdf = require("ffi/mupdf")
     self.koptinterface = require("document/koptinterface")
     self.configurable:loadDefaults(self.options)
     local ok
-    ok, self._document = pcall(pdf.openDocument, self.file, self.mupdf_cache_size)
+    ok, self._document = pcall(pdf.openDocument, self.file)
     if not ok then
         error(self._document)  -- will contain error message
     end

frontend/ui/widget/imagewidget.lua

@@ -1,6 +1,6 @@
 local Widget = require("ui/widget/widget")
 local CacheItem = require("cacheitem")
-local Image = require("ffi/mupdfimg")
+local Mupdf = require("ffi/mupdf")
 local Geom = require("ui/geometry")
 local Cache = require("cache")
 local DEBUG = require("dbg")
@@ -54,9 +54,9 @@ function ImageWidget:_loadfile()
             -- cache this image
             DEBUG("cache", hash)
             local cache = ImageCacheItem:new{
-                bb = Image:fromFile(self.file, self.width, self.height),
+                bb = Mupdf.renderImageFile(self.file, self.width, self.height),
             }
-            cache.size = cache.bb.pitch * cache.bb.h
+            cache.size = cache.bb.pitch * cache.bb.h * cache.bb:getBpp() / 8
             ImageCache:insert(hash, cache)
             self._bb = cache.bb
         end