X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=jam.h;h=33626040cc3ed58bd70349406f3a0480e7b1d0d9;hb=298d65bac130d6aa4c925c70f3342eb8e68a4b97;hp=f5ff88a3b4f71a640ea8338e796ed22944fd785e;hpb=d8523bb2f59981d9aa4c052850b15beec32c15c6;p=paperjam.git

diff --git a/jam.h b/jam.h
index f5ff88a..3362604 100644
--- a/jam.h
+++ b/jam.h
@@ -1,25 +1,52 @@
+/*
+ *	PaperJam -- Common declarations
+ *
+ *	(c) 2018--2022 Martin Mares <mj@ucw.cz>
+ */
+
 #include <vector>
 #include <list>
+#include <unordered_map>
+#include <cmath>
 
-#include "pdf-tools.h"
+using namespace std;
 
 typedef unsigned int uint;
 
 #define NONRET __attribute__((noreturn))
+#define UNUSED __attribute__((unused))
+#define FORMAT_CHECK(x,y,z) __attribute__((format(x,y,z)))
 
-struct pipeline;
+static inline bool is_zero(double z)
+{
+  return fabs(z) < 1e-6;
+}
 
-union arg_val {
-  string *s;
-  double d;
-  pipeline *p;
-};
+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;
 
 enum arg_type {
   AT_STRING,
+  AT_INT,
   AT_DOUBLE,
   AT_DIMEN,
-  AT_PIPELINE,			// Pipeline has an empty name
+  AT_SWITCH,
   AT_TYPE_MASK = 0xffff,
   AT_MANDATORY = 0x10000,
   AT_POSITIONAL = 0x20000,
@@ -28,29 +55,79 @@ enum arg_type {
 struct arg_def {
   const char *name;
   uint type;
+  const char *help;
+};
+
+class arg_val {
+public:
+  virtual bool given() { return false; }
+  virtual int as_int(int def) { return def; }
+  virtual double as_double(double def) { return def; }
+  virtual const string as_string(const string def) { return def; }
+  virtual string dump() { return "<undef>"; }
 };
 
-struct page_out {
+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);
+  out_context() { res_cnt = 0; }
 };
 
 struct page {
-  double width;
+  int index;		// Position in the source PDF, 0 for synthesized pages
+  double width;		// Physical dimensions of media
   double height;
-  void render(page_out *out, pdf_matrix xform);
+  BBox image_box;	// Bounds useful contents
+  virtual void render(out_context *out UNUSED, pdf_matrix xform UNUSED) { abort(); }
+  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 cmd {
+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_args {
-  vector<arg_val> arg;
-  vector<bool> arg_given;
+struct cmd_exec {
+  virtual vector<page *> process(vector <page *> &pages UNUSED) = 0;
 };
 
 struct cmd_def {
   const char *name;
   const arg_def *arg_defs;
-  cmd (*constructor)(cmd_args *args);
+  bool has_pipeline;
+  cmd_exec *(*constructor)(cmd *cmd);
+  const char *help;
+};
+
+struct cmd {
+  const cmd_def *def;
+  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 {
@@ -60,9 +137,52 @@ struct pipeline_selector {
 
 struct pipeline_branch {
   vector<pipeline_selector> selectors;
-  list<cmd> commands;
+  list<cmd *> commands;
 };
 
 struct pipeline {
   vector<pipeline_branch *> branches;
 };
+
+/*** Modules ***/
+
+// paperjam.cc
+
+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 parser_help();
+
+// cmds.cc
+
+extern const cmd_def cmd_table[];
+
+// 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);
+};