anisotropic texfilter support

pandatool/src/egg-palettize/textureProperties.cxx

@@ -18,7 +18,7 @@
 
 #include "textureProperties.h"
 #include "palettizer.h"
-
+#include <stdio.h>
 #include "pnmFileType.h"
 #include "datagram.h"
 #include "datagramIterator.h"
@@ -40,6 +40,7 @@ TextureProperties() {
   _force_format = false;
   _minfilter = EggTexture::FT_unspecified;
   _magfilter = EggTexture::FT_unspecified;
+  _anisotropic_degree = 0;
   _color_type = (PNMFileType *)NULL;
   _alpha_type = (PNMFileType *)NULL;
 }
@@ -57,6 +58,7 @@ TextureProperties(const TextureProperties &copy) :
   _force_format(copy._force_format),
   _minfilter(copy._minfilter),
   _magfilter(copy._magfilter),
+  _anisotropic_degree(copy._anisotropic_degree),
   _color_type(copy._color_type),
   _alpha_type(copy._alpha_type)
 {
@@ -75,6 +77,7 @@ operator = (const TextureProperties &copy) {
   _force_format = copy._force_format;
   _minfilter = copy._minfilter;
   _magfilter = copy._magfilter;
+  _anisotropic_degree = copy._anisotropic_degree;
   _color_type = copy._color_type;
   _alpha_type = copy._alpha_type;
 }
@@ -153,9 +156,11 @@ get_string() const {
     num << _num_channels;
     result += num.str();
   }
+
   result += get_format_string(_format);
   result += get_filter_string(_minfilter);
   result += get_filter_string(_magfilter);
+  result += get_anisotropic_degree_string(_anisotropic_degree);
   result += get_type_string(_color_type, _alpha_type);
   return result;
 }
@@ -182,6 +187,7 @@ update_properties(const TextureProperties &other) {
 
   _minfilter = union_filter(_minfilter, other._minfilter);
   _magfilter = union_filter(_magfilter, other._magfilter);
+  _anisotropic_degree = max(_anisotropic_degree, other._anisotropic_degree);
 
   if (_color_type == (PNMFileType *)NULL) {
     _color_type = other._color_type;
@@ -339,6 +345,7 @@ update_egg_tex(EggTexture *egg_tex) const {
   egg_tex->set_format(_format);
   egg_tex->set_minfilter(_minfilter);
   egg_tex->set_magfilter(_minfilter);
+  egg_tex->set_anisotropic_degree(_anisotropic_degree);
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -353,7 +360,8 @@ bool TextureProperties::
 egg_properties_match(const TextureProperties &other) const {
   return (_format == other._format &&
           _minfilter == other._minfilter &&
-          _magfilter == other._magfilter);
+          _magfilter == other._magfilter &&
+          _anisotropic_degree == other._anisotropic_degree);
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -372,6 +380,9 @@ operator < (const TextureProperties &other) const {
   if (_magfilter != other._magfilter) {
     return (int)_magfilter < (int)other._magfilter;
   }
+  if (_anisotropic_degree != other._anisotropic_degree) {
+    return _anisotropic_degree < other._anisotropic_degree;
+  }
   if (_color_type != other._color_type) {
     return _color_type < other._color_type;
   }
@@ -393,6 +404,7 @@ operator == (const TextureProperties &other) const {
   return (_format == other._format &&
           _minfilter == other._minfilter &&
           _magfilter == other._magfilter &&
+          _anisotropic_degree == other._anisotropic_degree &&
           _color_type == other._color_type &&
           (_color_type == (PNMFileType *)NULL ||
            _alpha_type == other._alpha_type));
@@ -512,6 +524,21 @@ get_filter_string(EggTexture::FilterType filter_type) {
   return "x";
 }
 
+string TextureProperties::
+get_anisotropic_degree_string(int aniso_degree) {
+    if(aniso_degree<=1)
+        return "";
+     else {
+         char deg_str[20];
+
+           deg_str[0]='a';
+           deg_str[1]='n';
+           sprintf(deg_str+2,"%d",aniso_degree);
+           string result(deg_str);
+           return result;
+     }
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: TextureProperties::get_type_string
 //       Access: Private, Static
@@ -612,6 +639,7 @@ write_datagram(BamWriter *writer, Datagram &datagram) {
   datagram.add_bool(_force_format);
   datagram.add_int32((int)_minfilter);
   datagram.add_int32((int)_magfilter);
+  datagram.add_int32(_anisotropic_degree);
   writer->write_pointer(datagram, _color_type);
   writer->write_pointer(datagram, _alpha_type);
 }
@@ -681,6 +709,7 @@ fillin(DatagramIterator &scan, BamReader *manager) {
   }
   _minfilter = (EggTexture::FilterType)scan.get_int32();
   _magfilter = (EggTexture::FilterType)scan.get_int32();
+  _anisotropic_degree = scan.get_int32();
   manager->read_pointer(scan);  // _color_type
   manager->read_pointer(scan);  // _alpha_type
 }

pandatool/src/egg-palettize/textureProperties.h

@@ -61,17 +61,20 @@ public:
   EggTexture::Format _format;
   bool _force_format;
   EggTexture::FilterType _minfilter, _magfilter;
+  int _anisotropic_degree;
   PNMFileType *_color_type;
   PNMFileType *_alpha_type;
 
 private:
   static string get_format_string(EggTexture::Format format);
   static string get_filter_string(EggTexture::FilterType filter_type);
+  static string get_anisotropic_degree_string(int aniso_degree);
   static string get_type_string(PNMFileType *color_type,
                                 PNMFileType *alpha_type);
 
   static EggTexture::Format union_format(EggTexture::Format a,
                                          EggTexture::Format b);
+
   static EggTexture::FilterType union_filter(EggTexture::FilterType a,
                                              EggTexture::FilterType b);
   // The TypedWritable interface follows.

pandatool/src/egg-palettize/textureReference.cxx

@@ -104,6 +104,7 @@ from_egg(EggFile *egg_file, EggData *data, EggTexture *egg_tex) {
   _properties._format = _egg_tex->get_format();
   _properties._minfilter = _egg_tex->get_minfilter();
   _properties._magfilter = _egg_tex->get_magfilter();
+  _properties._anisotropic_degree = _egg_tex->get_anisotropic_degree();
 
   string name = filename.get_basename();
   TextureImage *texture = pal->get_texture(name);
@@ -413,6 +414,10 @@ write(ostream &out, int indent_level) const {
         break;
   }
 
+  if(_properties._anisotropic_degree>1) {
+        out << " aniso " << _properties._anisotropic_degree;
+  }
+
   out << "\n";
 }
 

pandatool/src/egg-palettize/textureRequest.cxx

@@ -35,6 +35,7 @@ TextureRequest() {
   _force_format = false;
   _minfilter = EggTexture::FT_unspecified;
   _magfilter = EggTexture::FT_unspecified;
+  _anisotropic_degree = 0;
   _alpha_mode = EggRenderMode::AM_unspecified;
   _omit = false;
   _margin = 0;

pandatool/src/egg-palettize/textureRequest.h

@@ -48,6 +48,7 @@ public:
   bool _force_format;
   EggTexture::FilterType _minfilter;
   EggTexture::FilterType _magfilter;
+  int _anisotropic_degree;
   EggRenderMode::AlphaMode _alpha_mode;
   bool _omit;
   int _margin;

pandatool/src/egg-palettize/txaLine.cxx

@@ -38,6 +38,7 @@ TxaLine() {
   _scale = 0.0;
   _x_size = 0;
   _y_size = 0;
+  _aniso_degree = 0;
   _num_channels = 0;
   _format = EggTexture::F_unspecified;
   _force_format = false;
@@ -189,6 +190,26 @@ parse(const string &line) {
         }
         _got_margin = true;
 
+      } else if (word == "aniso") {
+        ++wi;
+        if (wi == words.end()) {
+          nout << "Integer argument required for 'aniso'.\n";
+          return false;
+        }
+
+        const string &arg = (*wi);
+        if (!string_to_int(arg, _aniso_degree)) {
+          nout << "Not an integer: " << arg << "\n";
+          return false;
+        }
+        if ((_aniso_degree < 2) || (_aniso_degree > 16)) {
+          // make it an error to specific degree 0 or 1, which means no anisotropy so it's probably an input mistake
+          nout << "Invalid anistropic degree (range is 2-16): " << _aniso_degree << "\n";
+          return false;
+        }
+
+        _keywords.push_back(KW_anisotropic);
+
       } else if (word == "coverage") {
         ++wi;
         if (wi == words.end()) {
@@ -295,6 +316,7 @@ match_egg(EggFile *egg_file) const {
     case KW_nearest:
     case KW_linear:
     case KW_mipmap:
+    case KW_anisotropic:
       // These mean nothing to an egg file.
       break;
 
@@ -421,6 +443,10 @@ match_texture(TextureImage *texture) const {
       request._magfilter = EggTexture::FT_linear_mipmap_linear;
       break;
 
+    case KW_anisotropic:
+      request._anisotropic_degree = _aniso_degree;
+      break;
+
     case KW_cont:
       got_cont = true;
       break;

pandatool/src/egg-palettize/txaLine.h

@@ -72,6 +72,7 @@ private:
   bool _force_format;
   EggRenderMode::AlphaMode _alpha_mode;
 
+  int _aniso_degree;
   bool _got_margin;
   int _margin;
   bool _got_coverage_threshold;
@@ -82,7 +83,8 @@ private:
     KW_nearest,
     KW_linear,
     KW_mipmap,
-    KW_cont
+    KW_cont,
+    KW_anisotropic
   };
 
   typedef pvector<Keyword> Keywords;