improved utf-8 code to correctly decode utf-8 byte sequences and not to rely on endle...

SVN-Revision: 2502

diff --git a/src/game_session.h b/src/game_session.h
index 59023b3..a1ed467 100644 (file)
--- a/src/game_session.h
+++ b/src/game_session.h
@@ -86,6 +86,9 @@ public:
   Sector* get_current_sector()
   { return currentsector; }
 
+  Level* get_current_level()
+  { return level; }
+
   void start_sequence(const std::string& sequencename);
   /// called by JoystickKeyboardController after an ascii key has been pressed
   void try_cheats();

diff --git a/src/scripting/level.cpp b/src/scripting/level.cpp
index 9b6749f..ff828b4 100644 (file)
--- a/src/scripting/level.cpp
+++ b/src/scripting/level.cpp
@@ -4,6 +4,7 @@
 #include <stdio.h>
 #include "level.h"
 #include "game_session.h"
+#include "flip_level_transformer.h"
 
 namespace Scripting
 {
@@ -24,4 +25,11 @@ namespace Scripting
   {
     GameSession::current()->respawn(sector, spawnpoint);
   }
+
+  void
+  Level::flip_vertically()
+  {
+    FlipLevelTransformer flip_transformer;
+    flip_transformer.transform(GameSession::current()->get_current_level());
+  }
 }

diff --git a/src/scripting/level.h b/src/scripting/level.h
index e021742..aae3faf 100644 (file)
--- a/src/scripting/level.h
+++ b/src/scripting/level.h
@@ -16,6 +16,8 @@ public:
     void finish();
     /** spawn tux at specified sector and spawnpoint */
     void spawn(const std::string& sector, const std::string& spawnpoint);
+    /** Flip level vertically */
+    void flip_vertically();
 };
 
 }

diff --git a/src/scripting/wrapper.cpp b/src/scripting/wrapper.cpp
index f675e99..ed511ff 100644 (file)
--- a/src/scripting/wrapper.cpp
+++ b/src/scripting/wrapper.cpp
@@ -127,6 +127,16 @@ static int Level_spawn_wrapper(HSQUIRRELVM v)
   return 0;
 }
 
+static int Level_flip_vertically_wrapper(HSQUIRRELVM v)
+{
+  Scripting::Level* _this;
+  sq_getinstanceup(v, 1, (SQUserPointer*) &_this, 0);
+  
+  _this->flip_vertically();
+  
+  return 0;
+}
+
 static int ScriptedObject_set_animation_wrapper(HSQUIRRELVM v)
 {
   Scripting::ScriptedObject* _this;
@@ -408,6 +418,7 @@ static WrappedFunction supertux_Camera_methods[] = {
 static WrappedFunction supertux_Level_methods[] = {
   { "finish", &Level_finish_wrapper },
   { "spawn", &Level_spawn_wrapper },
+  { "flip_vertically", &Level_flip_vertically_wrapper },
 };
 
 static WrappedFunction supertux_ScriptedObject_methods[] = {

diff --git a/src/video/font.cpp b/src/video/font.cpp
index 90a319e..cc45c1c 100644 (file)
--- a/src/video/font.cpp
+++ b/src/video/font.cpp
@@ -44,9 +44,7 @@ Font::Font(const std::string& file, FontType ntype, int nw, int nh,
       first_char = 48;
       break;
   }
-  last_char = first_char + (chars->h / h) * 16;
-  if(last_char > 127 && last_char < 160) // we have left out some control chars at 128-159
-    last_char += 32;
+  char_count = (chars->h / h) * 16;
    
   // Load shadow font.
   if(shadowsize > 0) {
@@ -165,77 +163,93 @@ Font::draw_text(const std::string& text, const Vector& pos,
   draw_chars(chars, text, pos, drawing_effect, alpha);
 }
 
+/** decoding of a byte stream to a single unicode character.
+ * This should be correct for well formed utf-8 sequences but doesn't check for
+ * all forms of illegal sequences.
+ * (see unicode standard section 3.10 table 3-5 and 3-6 for details)
+ */
+uint32_t decode_utf8(const std::string& text, size_t& p)
+{
+  // 1 byte sequence
+  uint32_t c = (unsigned char) text[p++];
+  if(c <= 0x7F) {
+    return c;
+  }
+  
+  // 2 byte sequence
+  if(p >= text.size())
+    throw std::runtime_error("Malformed utf-8 sequence");
+  uint32_t c2 = (unsigned char) text[p++];
+  if(c <= 0xDF) {
+    if(c < 0xC2)
+      throw std::runtime_error("Malformed utf-8 sequence");
+    return (c & 0x1F) << 6 | (c2 & 0x3F);
+  }
+  
+  // 3 byte sequence
+  if(p >= text.size())
+    throw std::runtime_error("Malformed utf-8 sequence");
+  uint32_t c3 = (unsigned char) text[p++];
+  if(c <= 0xEF) {
+    return (c & 0x0F) << 12 | (c2 & 0x3F) << 6 | (c3 & 0x3F);
+  }
+  
+  // 4 byte sequence
+  if(p >= text.size())
+    throw std::runtime_error("Malformed utf-8 sequence");
+  uint32_t c4 = (unsigned char) text[p++];
+  if(c <= 0xF4) {
+    return (c & 0x07) << 18 | (c2 & 0x3F) << 12 | (c3 & 0x3F) << 6 
+      | (c4 & 0x3F);
+  }
+
+  throw std::runtime_error("Malformed utf-8 sequence");
+}
+
 void
 Font::draw_chars(Surface* pchars, const std::string& text, const Vector& pos,
                  uint32_t drawing_effect, uint8_t alpha) const
 {
   SurfaceImpl* impl = pchars->impl;
-  int utf8suppl = 0;
 
   Vector p = pos;
-  for(size_t i = 0; i < text.size(); ++i) {
-    int c = (unsigned char) text[i];
-    int d = 0;
-    if(c > 127 && c < 160) // correct for the 32 controlchars at 128-159
-      c -= 32;
-    if (c > 0xC2 && text.size() == i+1)  // string ends with control char
-    {
-      std::cerr << "String \"" << text << "\" is malformed.\n";
-      return;
-    }
-    else
-      d = (unsigned char) text[i+1];
-    
-    if (c == 0xC3 && d < 160) // first-byte identifier of U0080 ("C1 Control Characters and Latin-1 Supplement")
-    {                         // iso-8859-1 equiv character is capital A with tilde above, signified as "C3 83" in utf-8
-      utf8suppl = 64;
-      continue;
-    }
-    else if (c == 0xC3 && d >= 160) // U0080 pt. 2
-    {
-      utf8suppl = 32;
-      continue;
-    }
-    else if (c == 0xC4 && d < 160)
-    {
-      utf8suppl = 128;
-      continue;
-    }
-    else if (c == 0xC4 && d >= 160)
-    {
-      utf8suppl = 96;
-      continue;
-    }
-    else if (c == 0xC5 && d < 160) // first-byte identifier of U0100 ("Latin Extended-A")
-    {                              // iso-8859-1 equiv character is capital A with ring above, signified as "C3 85" in utf-8
-      utf8suppl = 192;
-      continue;
-    }
-    else if (c == 0xC5 && d >= 160) // first-byte identifier of U0100 ("Latin Extended-A")
-    {                               // iso-8859-1 equiv character is capital A with ring above, signified as "C3 85" in utf-8
-      utf8suppl = 160;
-      continue;
-    }
-    // insert more clauses here once somebody will need them
+  size_t i = 0;
+  while(i < text.size()) {
+    uint32_t c = decode_utf8(text, i);
+    ssize_t font_index;
 
     // a non-printable character?
-    if(c == '\n') {
+    if(c == '\n') {                                      
       p.x = pos.x;
       p.y += h + 2;
       continue;
     }
-    if(c == ' ' || c < first_char || c > last_char) {
+    if(c == ' ') {
       p.x += w;
       continue;
     }
 
-    c += utf8suppl;
-    utf8suppl = 0;
-    
-    int index = c - first_char;
-    int source_x = (index % 16) * w;
-    int source_y = (index / 16) * h;
+    font_index = c - first_char;
+    // we don't have the control chars 0x80-0xa0 in the font
+    if(c >= 0x80) {
+      font_index -= 32;
+      if(c <= 0xa0) {
+#ifdef DEBUG
+        std::cout << "Unsupported utf-8 character '" << c << "' found\n";
+#endif
+        font_index = 0;
+      }
+    }
+        
+    if(font_index < 0 || font_index >= (ssize_t) char_count) {
+#ifdef DEBUG
+      std::cout << "Unsupported utf-8 character found\n";
+#endif
+      font_index = 0;
+    }                   
 
+    int source_x = (font_index % 16) * w;
+    int source_y = (font_index / 16) * h;
     impl->draw_part(source_x, source_y, p.x, p.y, w, h, alpha, drawing_effect);
     p.x += w;
   }

diff --git a/src/video/font.h b/src/video/font.h
index 9d2db0e..3f53c33 100644 (file)
--- a/src/video/font.h
+++ b/src/video/font.h
@@ -51,10 +51,7 @@ public:
    */
   float get_text_width(const std::string& text) const;
   
-  /** returns the height of a given text. (Note that I won't add a normal
-   * get_width function here, as we might switch to variable width fonts in the
-   * future.)
-   * Supports breaklines.
+  /** returns the height of a given text. This function supports breaklines.
    * In case, you are positive that your text doesn't use break lines, you can
    * just use get_height().
    */
@@ -85,9 +82,9 @@ private:
   int shadowsize;
   
   /// the number of the first character that is represented in the font
-  int first_char;
+  uint32_t first_char;
   /// the number of the last character that is represented in the font
-  int last_char;
+  uint32_t char_count;
 };
 
 #endif

diff --git a/src/video/semantic.cache b/src/video/semantic.cache
deleted file mode 100644 (file)
index 3b1f439..0000000
--- a/src/video/semantic.cache
+++ /dev/null
@@ -1,62 +0,0 @@
-;; Object semantic.cache
-;; SEMANTICDB Tags save file
-(semanticdb-project-database "semantic.cache"
-  :file "semantic.cache"
-  :tables (list 
-   (semanticdb-table "drawing_context.h"
-    :file "drawing_context.h"
-    :pointmax 5111
-    :major-mode 'c++-mode
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-    :unmatched-syntax 'nil
-    )
-   (semanticdb-table "drawing_context.cpp"
-    :file "drawing_context.cpp"
-    :pointmax 11560
-    :major-mode 'c++-mode
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-    )
-   (semanticdb-table "surface.cpp"
-    :file "surface.cpp"
-    :pointmax 26873
-    :major-mode 'c++-mode
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-    )
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-    :file "font.h"
-    :pointmax 2943
-    :major-mode 'c++-mode
-    :tokens '(("SUPERTUX_FONT_H" variable nil nil ((const . t)) nil nil [887 913]) ("string" include t nil nil [912 929]) ("stdint.h" include t nil nil [930 949]) ("video/surface.h" include nil nil nil [951 977]) ("math/vector.h" include nil nil nil [978 1002]) ("FontAlignment" type "enum" (("LEFT_ALLIGN" variable "int" nil ((const . t)) nil ((reparse-symbol . enumsubparts)) [1027 1039]) ("CENTER_ALLIGN" variable "int" nil ((const . t)) nil ((reparse-symbol . enumsubparts)) [1042 1056]) ("RIGHT_ALLIGN" variable "int" nil ((const . t)) nil ((reparse-symbol . enumsubparts)) [1059 1073])) nil nil nil nil [1004 1074]) ("Font" type "class" (("public" label ((reparse-symbol . classsubparts)) [1089 1096]) ("FontType" type "enum" (("TEXT" variable "int" nil ((const . t)) nil ((reparse-symbol . enumsubparts)) [1119 1124]) ("NUM" variable "int" nil ((const . t)) nil ((reparse-symbol . enumsubparts)) [1158 1194])) nil nil nil ((reparse-symbol . classsubparts)) [1099 1195]) ("Font" function ("Font" type "class") (("file" variable ("std::string" type "class") nil ((const . t)) nil nil [1206 1230]) ("type" variable ("FontType" type "class") nil nil nil nil [1231 1245]) ("w" variable "int" nil nil nil nil [1246 1252]) ("h" variable "int" nil nil nil nil [1253 1259]) ("shadowsize" variable "int" "2" nil nil nil [1267 1283])) ((constructor . t) (prototype . t)) nil ((reparse-symbol . classsubparts)) [1201 1285]) ("Font" function "void" nil ((destructor . t) (prototype . t)) nil ((reparse-symbol . classsubparts)) [1288 1296]) ("get_text_width" function ("float") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [1522 1546])) ((prototype . t)) nil ((reparse-symbol . classsubparts)) [1501 1553]) ("get_text_height" function ("float") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [1888 1912])) ((prototype . t)) nil ((reparse-symbol . classsubparts)) [1866 1919]) ("get_height" function ("float") nil ((prototype . t)) nil ((reparse-symbol . classsubparts)) [1960 1985]) ("draw" function ("void") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [2134 2158]) ("pos" variable ("Vector" type "class") nil ((const . t)) nil nil [2159 2177]) ("allignment" variable ("FontAlignment" type "class") "LEFT_ALLIGN," nil nil nil [2190 2229]) ("drawing_effect" variable ("uint32_t" type "class") "NONE_EFFECT," nil nil nil [2242 2280]) ("alpha" variable ("uint8_t" type "class") "255" nil nil nil [2281 2300])) ((prototype . t)) nil ((reparse-symbol . classsubparts)) [2124 2308]) ("private" label ((reparse-symbol . classsubparts)) [2312 2320]) ("DrawingContext" type "class" nil nil nil nil ((reparse-symbol . classsubparts)) [2330 2351]) ("draw_text" function ("void") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [2372 2396]) ("pos" variable ("Vector" type "class") nil ((const . t)) nil nil [2397 2415]) ("drawing_effect" variable ("uint32_t" type "class") "NONE_EFFECT," nil nil nil [2433 2471]) ("alpha" variable ("uint8_t" type "class") "255" nil nil nil [2472 2491])) ((prototype . t)) nil ((reparse-symbol . classsubparts)) [2357 2499]) ("draw_chars" function ("void") (("pchars" variable ("Surface" type "class") nil ((pointer . 1)) nil nil [2521 2537]) ("text" variable ("std::string" type "class") nil ((const . t)) nil nil [2538 2562]) ("position" variable ("Vector" type "class") nil ((const . t)) nil nil [2581 2604]) ("drawing_effect" variable ("uint32_t" type "class") nil nil nil nil [2605 2629]) ("alpha" variable ("uint8_t" type "class") nil nil nil nil [2630 2644])) ((prototype . t)) nil ((reparse-symbol . classsubparts)) [2505 2651]) ("chars" variable ("Surface" type "class") nil ((pointer . 1)) nil nil [2657 2672]) ("shadow_chars" variable ("Surface" type "class") nil ((pointer . 1)) nil nil [2675 2697]) ("type" variable ("FontType" type "class") nil nil nil nil [2700 2714]) ("w" variable "int" nil nil nil nil [2717 2723]) ("h" variable "int" nil nil nil nil [2726 2732]) ("shadowsize" variable "int" nil nil nil nil [2735 2750]) ("first_char" variable "int" nil nil nil nil [2828 2843]) ("last_char" variable "int" nil nil nil nil [2917 2931])) nil nil nil nil [1076 2934]))
-    :unmatched-syntax '((FRIEND 2323 . 2329))
-    )
-   (semanticdb-table "font.cpp"
-    :file "font.cpp"
-    :pointmax 4862
-    :major-mode 'c++-mode
-    :tokens '(("config.h" include t nil nil [865 884]) ("cstdlib" include t nil nil [886 904]) ("cstring" include t nil nil [905 923]) ("stdexcept" include t nil nil [924 944]) ("app/globals.h" include nil nil nil [946 970]) ("lisp/parser.h" include nil nil nil [971 995]) ("lisp/lisp.h" include nil nil nil [996 1018]) ("screen.h" include nil nil nil [1019 1038]) ("font.h" include nil nil nil [1039 1056]) ("drawing_context.h" include nil nil nil [1057 1085]) ("Font" function ("Font" type "class") (("file" variable ("std::string" type "class") nil ((const . t)) nil nil [1125 1149]) ("ntype" variable ("FontType" type "class") nil nil nil nil [1150 1165]) ("nw" variable "int" nil nil nil nil [1166 1173]) ("nh" variable "int" nil nil nil nil [1174 1181]) ("nshadowsize" variable "int" nil nil nil nil [1190 1206])) ((parent . "Font") (constructor . t)) nil nil [1114 2067]) ("Font" function "void" nil ((parent . "Font") (destructor . t)) nil nil [2069 2125]) ("get_text_width" function ("float") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [2154 2178])) ((parent . "Font")) nil nil [2127 2501]) ("get_text_height" function ("float") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [2531 2555])) ((parent . "Font")) nil nil [2503 2789]) ("get_height" function ("float") nil ((parent . "Font")) nil nil [2791 2837]) ("draw" function ("void") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [2855 2879]) ("pos_" variable ("Vector" type "class") nil ((const . t)) nil nil [2880 2899]) ("alignment" variable ("FontAlignment" type "class") nil nil nil nil [2900 2924]) ("drawing_effect" variable ("uint32_t" type "class") nil nil nil nil [2929 2953]) ("alpha" variable ("uint8_t" type "class") nil nil nil nil [2954 2968])) ((parent . "Font")) nil nil [2839 3770]) ("draw_text" function ("void") (("text" variable ("std::string" type "class") nil ((const . t)) nil nil [3793 3817]) ("pos" variable ("Vector" type "class") nil ((const . t)) nil nil [3818 3836]) ("drawing_effect" variable ("uint32_t" type "class") nil nil nil nil [3842 3866]) ("alpha" variable ("uint8_t" type "class") nil nil nil nil [3867 3881])) ((parent . "Font")) nil nil [3772 4080]) ("draw_chars" function ("void") (("pchars" variable ("Surface" type "class") nil ((pointer . 1)) nil nil [4104 4120]) ("text" variable ("std::string" type "class") nil ((const . t)) nil nil [4121 4145]) ("pos" variable ("Vector" type "class") nil ((const . t)) nil nil [4146 4164]) ("drawing_effect" variable ("uint32_t" type "class") nil nil nil nil [4182 4206]) ("alpha" variable ("uint8_t" type "class") nil nil nil nil [4207 4221])) ((parent . "Font")) nil nil [4082 4861]))
-    )
-   )
-  )

diff --git a/src/video/surface.cpp b/src/video/surface.cpp
index e686a65..823e23a 100644 (file)
--- a/src/video/surface.cpp
+++ b/src/video/surface.cpp
@@ -550,7 +550,7 @@ SurfaceOpenGL::create_gl(SDL_Surface * surf, GLuint * tex)
   // is present store in RGB instead of RGBA, this saves a few bytes
   // of memory, but much more importantly it makes the game look
   // *much* better in 16bit color mode
-  int internal_format = GL_RGBA/*GL_RGB10_A2*/;
+  int internal_format = GL_RGBA;
   bool has_alpha = false;
 
   unsigned char* buf = static_cast<unsigned char*>(conv->pixels);