bump crengine: count nb of images drawn & others (#4542)

Includes:
- Update french hyphenation pattern
- epub.css: update style for 'blockquote'
- DrawBuf: count nb of images and surface drawn

Adds Document:getDrawnImagesStatistics() to help deciding
if refresh with (possibly costly) dithering should be used
(on devices with HW dithering capabilities) with CreDocument:
when a page contains enough images to benefit from it.

frontend/document/credocument.lua

@@ -323,7 +323,7 @@ function CreDocument:drawCurrentView(target, x, y, rect, pos)
     -- change has been made, to avoid having crengine redraw the exact
     -- same buffer.
     -- And it could only change when some other methods from here are called
-    self._document:drawCurrentPage(self.buffer, self.render_color)
+    self._drawn_images_count, self._drawn_images_surface_ratio = self._document:drawCurrentPage(self.buffer, self.render_color)
     target:blitFrom(self.buffer, x, y, 0, 0, rect.w, rect.h)
 end
 

frontend/document/document.lua

@@ -402,6 +402,11 @@ function Document:drawPage(target, x, y, rect, pageno, zoom, rotation, gamma, re
         rect.w, rect.h)
 end
 
+function Document:getDrawnImagesStatistics()
+    -- For now, only set by CreDocument in CreDocument:drawCurrentView()
+    return self._drawn_images_count, self._drawn_images_surface_ratio
+end
+
 function Document:getPageText(pageno)
     -- is this worth caching? not done yet.
     local page = self._document:openPage(pageno)

spec/unit/readerrolling_spec.lua

@@ -186,13 +186,13 @@ describe("Readerrolling module", function()
         it("should show pages for different word gap", function()
             readerui.document:setSpaceCondensing(100)
             readerui:handleEvent(Event:new("ChangeScreenMode", "portrait"))
-            assert.are.same(266, readerui.document:getPageCount())
+            assert.are.same(249, readerui.document:getPageCount())
             readerui.document:setSpaceCondensing(75)
             readerui:handleEvent(Event:new("ChangeScreenMode", "portrait"))
-            assert.are.same(261, readerui.document:getPageCount())
+            assert.are.same(242, readerui.document:getPageCount())
             readerui.document:setSpaceCondensing(50)
             readerui:handleEvent(Event:new("ChangeScreenMode", "portrait"))
-            assert.are.same(247, readerui.document:getPageCount())
+            assert.are.same(233, readerui.document:getPageCount())
         end)
     end)
 

spec/unit/readersearch_spec.lua

@@ -66,8 +66,8 @@ describe("Readersearch module", function()
         end)
         it("should find the last occurrence", function()
             -- local logger = require("logger")
-            -- logger.info("nb of pages", doc:getPageCount())
-            -- 20181208: currently 266 pages
+            -- logger.warn("nb of pages", doc:getPageCount())
+            -- 20190202: currently 242 pages
             for i = 100, 180, 10 do
                 rolling:onGotoPage(i)
                 local words = search:searchFromEnd("Verona")

spec/unit/readertoc_spec.lua

@@ -25,7 +25,7 @@ describe("Readertoc module", function()
         title = toc:getTocTitleByPage(60)
         DEBUG("toc", toc.toc)
         assert(title == "SCENE V. A hall in Capulet's house.")
-        title = toc:getTocTitleByPage(195)
+        title = toc:getTocTitleByPage(187)
         assert(title == "SCENE I. Friar Laurence's cell.")
     end)
     describe("getTocTicks API", function()
@@ -68,7 +68,7 @@ describe("Readertoc module", function()
     end)
     it("should get page left of chapter", function()
         assert.truthy(toc:getChapterPagesLeft(10, 0) > 10)
-        assert.truthy(toc:getChapterPagesLeft(102, 0) > 10)
+        assert.truthy(toc:getChapterPagesLeft(97, 0) > 10)
         assert.are.same(nil, toc:getChapterPagesLeft(290, 0))
     end)
     it("should get page done of chapter", function()