X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=jam.h;h=33626040cc3ed58bd70349406f3a0480e7b1d0d9;hb=298d65bac130d6aa4c925c70f3342eb8e68a4b97;hp=002ad04b831d1f11b17884448a0c0ea721e4fb71;hpb=bb6a7cf9ecaec1dbd2837fdddc866be285ce053a;p=paperjam.git

diff --git a/jam.h b/jam.h
index 002ad04..3362604 100644
--- a/jam.h
+++ b/jam.h
@@ -1,14 +1,42 @@
+/*
+ *	PaperJam -- Common declarations
+ *
+ *	(c) 2018--2022 Martin Mares <mj@ucw.cz>
+ */
+
 #include <vector>
 #include <list>
+#include <unordered_map>
+#include <cmath>
 
 using namespace std;
 
-#include "pdf-tools.h"
-
 typedef unsigned int uint;
 
 #define NONRET __attribute__((noreturn))
 #define UNUSED __attribute__((unused))
+#define FORMAT_CHECK(x,y,z) __attribute__((format(x,y,z)))
+
+static inline bool is_zero(double z)
+{
+  return fabs(z) < 1e-6;
+}
+
+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 ***/
 
 struct pipeline;
 struct cmd;
@@ -27,6 +55,7 @@ enum arg_type {
 struct arg_def {
   const char *name;
   uint type;
+  const char *help;
 };
 
 class arg_val {
@@ -38,9 +67,13 @@ public:
   virtual string dump() { return "<undef>"; }
 };
 
+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);
@@ -48,27 +81,30 @@ 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) : width(_w), height(_h) { }
-  page(page *p) {
-    index = p->index;
-    width = p->width;
-    height = p->height;
-    bbox = p->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;
+      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) { };
 };
 
 struct cmd_exec {
-  virtual vector<page *> process(vector <page *> &pages UNUSED) { abort(); }
+  virtual vector<page *> process(vector <page *> &pages UNUSED) = 0;
 };
 
 struct cmd_def {
@@ -76,13 +112,22 @@ struct cmd_def {
   const arg_def *arg_defs;
   bool has_pipeline;
   cmd_exec *(*constructor)(cmd *cmd);
+  const char *help;
 };
 
 struct cmd {
   const cmd_def *def;
-  vector<arg_val *> args;
+  unordered_map<string, arg_val *> args;
   pipeline *pipe;
   cmd_exec *exec;
+  arg_val *arg(const string name)
+    {
+      auto it = args.find(name);
+      if (it != args.end())
+	return it->second;
+      else
+	return &null_arg;
+    }
 };
 
 struct pipeline_selector {
@@ -99,19 +144,45 @@ struct pipeline {
   vector<pipeline_branch *> branches;
 };
 
+/*** Modules ***/
+
 // paperjam.cc
 
-vector<page *> run_command_list(list<cmd *> &cmds, vector<page *> &pages);
+extern const char *in_name, *out_name;
+extern bool recalc_bbox;
+extern int debug_level;
+extern int debug_indent;
+extern bool no_auto_transforms;
+
+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
 
 void parse(const char *in, list<cmd *> &cmds);
-void help();
+void parser_help();
 
 // cmds.cc
 
 extern const cmd_def cmd_table[];
 
-// gs.cc
+// pdf.cc
 
+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);
+};