Automatic page rotation based on the /Rotate key

[paperjam.git] / jam.h

diff --git a/jam.h b/jam.h
index 31510d8c2b5f3469d3e6ab831919df33b92d231a..33626040cc3ed58bd70349406f3a0480e7b1d0d9 100644 (file)
--- a/jam.h
+++ b/jam.h
@@ -1,7 +1,7 @@
 /*
  *     PaperJam -- Common declarations
  *
- *     (c) 2018 Martin Mares <mj@ucw.cz>
+ *     (c) 2018--2022 Martin Mares <mj@ucw.cz>
  */
 
 #include <vector>
@@ -19,7 +19,7 @@ typedef unsigned int uint;
 
 static inline bool is_zero(double z)
 {
-  return fabs(z) < 0.001;
+  return fabs(z) < 1e-6;
 }
 
 static inline bool is_equal(double x, double y)
@@ -27,6 +27,13 @@ static inline bool is_equal(double x, double y)
   return is_zero(x-y);
 }
 
+void debug(const char *msg, ...) FORMAT_CHECK(printf, 1, 2);
+void warn(const char *msg, ...) FORMAT_CHECK(printf, 1, 2);
+void die(const char *msg, ...) FORMAT_CHECK(printf, 1, 2) NONRET;
+
+// This one is called during execution of commands and propagated as an exception
+void err(const char *msg, ...) FORMAT_CHECK(printf, 1, 2) NONRET;
+
 #include "pdf-tools.h"
 
 /*** Representation of commands ***/
@@ -48,6 +55,7 @@ enum arg_type {
 struct arg_def {
   const char *name;
   uint type;
+  const char *help;
 };
 
 class arg_val {
@@ -62,8 +70,10 @@ public:
 extern arg_val null_arg;
 
 struct out_context {
+  QPDF *pdf;
   QPDFObjectHandle resources;
   QPDFObjectHandle xobjects;
+  QPDFObjectHandle egstates;
   string contents;
   int res_cnt;
   string new_resource(const string type);
@@ -71,23 +81,25 @@ struct out_context {
 };
 
 struct page {
-  int index;
+  int index;           // Position in the source PDF, 0 for synthesized pages
   double width;                // Physical dimensions of media
   double height;
-  BBox bbox;           // Bounds useful contents
+  BBox image_box;      // Bounds useful contents
   virtual void render(out_context *out UNUSED, pdf_matrix xform UNUSED) { abort(); }
-  page(double _w=0, double _h=0) : index(0), width(_w), height(_h), bbox() { }
+  virtual void debug_dump() = 0;
+  page(double _w=0, double _h=0) : index(0), width(_w), height(_h), image_box() { }
   page(page *p)
     {
       index = p->index;
       width = p->width;
       height = p->height;
-      bbox = p->bbox;
+      image_box = p->image_box;
     }
 };
 
 struct empty_page : public page {
   void render(out_context *out UNUSED, pdf_matrix xform UNUSED) { }
+  void debug_dump() { debug("Empty page"); }
   empty_page(double _w=0, double _h=0) : page(_w, _h) { };
 };
 
@@ -100,6 +112,7 @@ struct cmd_def {
   const arg_def *arg_defs;
   bool has_pipeline;
   cmd_exec *(*constructor)(cmd *cmd);
+  const char *help;
 };
 
 struct cmd {
@@ -137,12 +150,16 @@ struct pipeline {
 
 extern const char *in_name, *out_name;
 extern bool recalc_bbox;
-extern int debug_mode;
+extern int debug_level;
 extern int debug_indent;
+extern bool no_auto_transforms;
 
-void debug(const char *msg, ...) FORMAT_CHECK(printf, 1, 2);
-void warn(const char *msg, ...) FORMAT_CHECK(printf, 1, 2);
-void die(const char *msg, ...) FORMAT_CHECK(printf, 1, 2) NONRET;
+class paperjam_error : public exception {
+  string message;
+public:
+  paperjam_error(string m) : message(m) { }
+  const char *what() const noexcept override { return message.c_str(); }
+};
 
 // parse.cc
 
@@ -159,3 +176,13 @@ void debug_pages(vector<page *> &pages);
 void process(list<cmd *> &cmds);
 vector<page *> run_command_list(list<cmd *> &cmds, vector<page *> &pages);
 vector<BBox> gs_bboxes(const char *in);
+
+class xform_page : public page {
+  page *orig_page;
+  pdf_matrix xform;
+  const char *description;
+public:
+  void render(out_context *out, pdf_matrix xform) override;
+  void debug_dump() override;
+  xform_page(page *p, const char *desc, pdf_matrix xf);
+};