New info for modes and examples

 - Updated Help info
 - Added more examples
 - Brief explanation of the Adaptive mode

README.md

@@ -6,6 +6,7 @@ The "paper" size does not change, just the elements are resized.
 ## Dependencies  
 The script uses `basename`, `cat`, `grep`, `bc`, `head` and `gs` (ghostscript).   
 You probably have everything installed already, except for ghostscript.   
+Optional dependencies are `imagemagick`, `pdfinfo` and `mdls` (Mac).
 
 ##### apt-get
 ```
@@ -19,17 +20,24 @@ sudo yum install ghostscript bc
 ```
 brew install ghostscript
 ```
-##### ImageMagick
-As of version 1.2.7 ImageMagick was reintroduced as an optional way to get the first page size.   
-You will need to install imagemagick and have `identify` available on your `$PATH` to then use the `-i` parameter.   
-
-
+##### Optionals
+From version 1.4.x I decided to create an adaptive method of getting the pagesize. It will try different methods if the previous one fails. People can also force a specific mode of operation with the `-m` parameter.   
+
+The order of operation is as follows:
+ 1. Try to get `/MediaBox` with cat + grep
+ 2. Failed AND MacOs ? Try mdls
+ 3. Failed AND NOT MacOS ? Try pdfinfo
+ 4. Failed ? Try ImageMagick's identify
+ 5. Failed ? Exit with error message
+
+The postscript/ghostscript method was removed until I can write a PS script that gets the page size.   
+
 ## Help info
 ```
 $ pdfscale -h
-pdfscale v1.3.1
+pdfscale v1.4.5
 
-Usage: pdfscale [-v] [-s <factor>] [-i] <inFile.pdf> [outfile.pdf]
+Usage: pdfscale [-v] [-s <factor>] [-i|-c] <inFile.pdf> [outfile.pdf]
        pdfscale -h
        pdfscale -V
 
@@ -38,15 +46,24 @@ Parameters:
              Use twice for even more information
  -h          Print this help to screen and exits
  -V          Prints version to screen and exits
- -i          Use imagemagick to get page size, 
-             instead of postscript method
+ -m <mode>   Force a mode of page size detection. 
+             Will disable the Adaptive Mode.
  -c          Use cat + grep to get page size, 
              instead of postscript method
  -s <factor> Changes the scaling factor, defaults to 0.95
              MUST be a number bigger than zero. 
              Eg. -s 0.8 for 80% of the original size 
 
+Modes:
+ a, adaptive  Default mode, tries all the methods below
+ c, cat+grep  Forces the use of the cat + grep method
+ m, mdls      Forces the use of MacOS Quartz mdls
+ p, pdfinfo   Forces the use of Linux PdfInfo
+ i, identify  Forces the use of ImageMagick's Identify
+
 Notes:
+ - Page size detection will try different modes until it gets
+   a page size, or you can force a mode with -m 'mode'
  - Options must be passed before the file names to be parsed
  - The output filename is optional. If no file name is passed
    the output file will have the same name/destination of the
@@ -62,24 +79,42 @@ Examples:
  pdfscale myPdfFile.pdf myScaledPdf
  pdfscale -v -v myPdfFile.pdf
  pdfscale -s 0.85 myPdfFile.pdf myScaledPdf.pdf
- pdfscale -i -s 0.80 -v myPdfFile.pdf
+ pdfscale -m pdfinfo -s 0.80 -v myPdfFile.pdf
  pdfscale -v -v -s 0.7 myPdfFile.pdf
  pdfscale -h
 ```
 
-## Example run
+## Example runs
 ```
-$ pdfscale -i -v -s 0.5 ../input.pdf 
-pdfscale v1.2.10 - Verbose execution
+$ ./pdfScale.sh -v -m i ../00-test-xml2dacte.pdf 
+pdfScale.sh v1.4.5 - Verbose execution
 Checking for ghostscript and bcmath
 Checking for imagemagick's identify
-  Scale factor: 0.5
-    Input file: ../input.pdf
-   Output file: ../input.SCALED.pdf
+  Scale factor: 0.95
+    Input file: ../00-test-xml2dacte.pdf
+   Output file: ../00-test-xml2dacte.SCALED.pdf
+ Adaptive mode: Disabled
+        Method: ImageMagick's Identify
          Width: 595 postscript-points
         Height: 842 postscript-points
- Translation X: 297.500000
- Translation Y: 421.000000
+ Translation X: 15.657425
+ Translation Y: 22.157230
+```
+```
+$ ./pdfScale.sh -v -v ../input-nup.pdf 
+2017-02-22:03:09:59 | pdfScale.sh v1.4.5 - Verbose execution
+2017-02-22:03:09:59 | Checking for ghostscript and bcmath
+2017-02-22:03:09:59 |   Scale factor: 0.95
+2017-02-22:03:09:59 |     Input file: ../input-nup.pdf
+2017-02-22:03:09:59 |    Output file: ../input-nup.SCALED.pdf
+2017-02-22:03:09:59 |  Adaptive mode: Enabled
+2017-02-22:03:09:59 |         Method: Cat + Grep
+2017-02-22:03:09:59 |                 Failed
+2017-02-22:03:09:59 |         Method: Mac Quartz mdls
+2017-02-22:03:09:59 |          Width: 595 postscript-points
+2017-02-22:03:09:59 |         Height: 842 postscript-points
+2017-02-22:03:09:59 |  Translation X: 15.657425
+2017-02-22:03:09:59 |  Translation Y: 22.157230
 ```
 
 ## System Install