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win/gnome/gnglyph.c

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+/*	SCCS Id: @(#)gnglyph.c	3.3	2000/07/16	*/
+/* Copyright (C) 1998 by Erik Andersen <andersee@debian.org> */
+/* NetHack may be freely redistributed.  See license for details. */
+
+#include "gnglyph.h"
+
+static GHackGlyphs     ghack_glyphs;
+static GdkImlibImage** ghack_tiles = NULL;
+
+/* NAME:
+ *     ghack_init_glyphs(char* xpm_file)
+ *
+ * ARGUMENTS:
+ *     char *xpm_file -- The name of the image file.
+ *                       May be any image format imlib recognizes.
+ *			 Does not have to be XPM.
+ *
+ * RETURNS:
+ *     TRUE  upon successful loading of the glyphs.
+ *     FALSE upon failure.
+ *
+ * PURPOSE:
+ *     Constructor for the Glyph object.  Well, really each glyph
+ *     object is a collection of glyphs, or tiles.  This constructor
+ *     takes a single argument: the name of the image file that contains
+ *     the tile images.
+ *
+ * NOTES:
+ *     The glyphs (tiles) must be in the image in a certain way: the
+ *     glyphs must be stacked such that the resultant image is
+ *     TILE_X wide, and TILE_Y * (number of glyphs) high.  In this
+ *     sense, TILE_X == TILE_Y, and can be any reasonable integer--
+ *     say, 16 <= TILE_X <= 64.  Because the glyph number is tightly
+ *     coupled to the Nethack object it represents, the order of the
+ *     glyphs in the image is imporant: Glyph 1 is at the top of the
+ *     image, while Glyph N (the last glyph) is at the bottom.
+ *
+ *     What's the difference between a glyph and a tile?  Well, a
+ *     tile is just an image.  A glyph is a tile that knows its
+ *     place in line.
+ *
+ *     This initializer relies heavily on gdk_imlib.  Thanks, Rasterman.
+ */
+
+int
+ghack_init_glyphs( const char *xpmFile)
+{
+  ghack_glyphs.im = gdk_imlib_load_image((char *) xpmFile);
+  if ( ! ghack_glyphs.im )
+    {
+      g_error("Couldn't load required xpmFile!");
+      return -1;
+    }
+
+  gdk_imlib_render(ghack_glyphs.im, ghack_glyphs.im->rgb_width,
+	  ghack_glyphs.im->rgb_height);
+
+  ghack_glyphs.count = ghack_glyphs.im->rgb_height / ghack_glyphs.im->rgb_width;
+  ghack_glyphs.width  = ghack_glyphs.im->rgb_width;
+  ghack_glyphs.height = ghack_glyphs.im->rgb_height / ghack_glyphs.count;
+
+
+  /* Assume the tiles are stacked vertically.
+   * Further, assume that the tiles are SQUARE
+   */
+  ghack_tiles = g_new0( GdkImlibImage*, ghack_glyphs.count );
+  if (ghack_tiles == NULL)
+      return -1;
+  else
+      return 0;
+}
+
+void
+ghack_free_glyphs( )
+{
+    int i;
+    for ( i=0 ; i<ghack_glyphs.count ; i++)
+	gdk_imlib_destroy_image(ghack_tiles[i]);
+    g_free( ghack_tiles);
+    gdk_imlib_destroy_image(ghack_glyphs.im);
+    ghack_glyphs.im=NULL;
+}
+
+
+/* NAME:
+ *     ghack_glyph_count( )
+ *
+ * ARGUMENTS:
+ *     None.
+ *
+ * RETURNS:
+ *     int -- The number of glyphs in this object.
+ *
+ * PURPOSE:
+ *     Simply reports the number of glyphs in this object.
+ */
+
+int
+ghack_glyph_count( )
+{
+  return ghack_glyphs.count;
+}
+
+
+/* NAME:
+ *     ghack_glyph_height()
+ *
+ * ARGUMENTS:
+ *     None
+ *
+ * RETURNS:
+ *     int -- The glyph height.
+ *
+ * PURPOSE:
+ *     Returns the standard glyph height.
+ */
+
+int
+ghack_glyph_height()
+{
+  return ghack_glyphs.height;
+}
+
+
+/* NAME:
+ *     ghack_glyph_width()
+ *
+ * ARGUMENTS:
+ *     None
+ *
+ * RETURNS:
+ *     int -- The glyph width.
+ *
+ * PURPOSE:
+ *     Returns the standard glyph width.
+ */
+
+int
+ghack_glyph_width()
+{
+  return ghack_glyphs.width;
+}
+
+
+/* NAME:
+ *     ghack_image_from_glyph( int glyph, gboolean force)
+ *
+ * ARGUMENTS:
+ *     int glyph  -- The glyph number.
+ *     gboolean force -- force it to re-render.
+ *
+ * RETURNS:
+ *     GdkImlibImage* -- The glyph image, as a GdkImlibImage.
+ *
+ * PURPOSE:
+ *     Decodes the glyph into an image suitable for manipulation
+ */
+
+GdkImlibImage*
+ghack_image_from_glyph( int glyph, gboolean force )
+{
+  int tile = glyph2tile[glyph];
+
+  if ( tile >= ghack_glyphs.count || tile < 0 )
+    {
+      g_warning("Aiiee! I've was asked for a tile outside the allowed range!\n"
+	    "Email this to other-gnomehack@lists.debian.org");
+      g_warning("Max tile: %d   Tile asked for: %d",
+		ghack_glyphs.count, tile);
+      return NULL;
+    }
+
+  if (ghack_glyphs.im == NULL)
+    {
+    g_warning("Aiiee! I've been asked to clone from a null image.\n"
+	    "Email this to other-gnomehack@lists.debian.org");
+    g_warning( "making image from tile %d, force=%s\n", tile,
+	    (force==TRUE)? "TRUE": "FALSE");
+    }
+
+  if (force == TRUE)
+    {
+    g_warning("Aiiee! I've been asked to force rendering.\n"
+	    "Email this to other-gnomehack@lists.debian.org");
+    g_warning( "making image from tile %d, force=%s\n", tile,
+	    (force==TRUE)? "TRUE" : "FALSE");
+    }
+
+  if (!ghack_tiles[tile] || force)
+  {
+#if 0
+      fprintf( stderr, "crop_and_clone: glyph=%d, tile=%d, ptr=%p, x=%d, y=%d, w=%d, h=%d\n", glyph, tile,
+	      (void*)&(ghack_tiles[tile]), 0,
+	      tile * ghack_glyphs.width,
+	      ghack_glyphs.height,
+	      ghack_glyphs.width);
+#endif
+      if (ghack_glyphs.im->pixmap == NULL)
+	  g_warning( "Aiiee!  ghack_glyphs.im->pixmap==NULL!!!!\n");
+      ghack_tiles[tile] = gdk_imlib_crop_and_clone_image(ghack_glyphs.im, 0,
+	      tile * ghack_glyphs.width,
+	      ghack_glyphs.height,
+	      ghack_glyphs.width);
+  }
+
+  if (ghack_tiles[tile] && (!ghack_tiles[tile]->pixmap || force))
+  {
+      if ( gdk_imlib_render(ghack_tiles[tile],
+		  ghack_tiles[tile]->rgb_width,
+		  ghack_tiles[tile]->rgb_height) == 0) {
+	  g_error("GLYPH: couldn't create tile # %d", tile);
+      }
+      if ( !ghack_tiles[tile]->pixmap )
+	  g_error("Strange, tile # %d didn't get rendered???", tile);
+  }
+
+  return ghack_tiles[tile];
+}
+