Graphic Cache Tester

[DerVVulfman]

Graphic Cache Tester
Version: 1.0

Introduction
As you know, trying to load a graphic image that isn't there can crash your game. Now you have a solution.

This system is an addition to the RPG::Cache system allowing you to run a test to see if a graphic image is part of your project or not. By running a test, it can return a true/false value before you attempt to load a file.



Script

For once, it's in a spoiler

Code:

#==============================================================================
# ** Graphic Cache Tester
#------------------------------------------------------------------------------
#    version 1.0
#    by DerVVulfman
#    04-21-2011
#    RGSS / RPGMaker XP
#==============================================================================
#
#  INTRODUCTION AND INSTRUCTIONS:
#
#  As you know, trying to load a graphic image that isn't there can crash your
#  game.  Now you have a solution.
#
#  This system is an addition to the  RPG::Cache  system allowing you to run a
#  test to see if a graphic image is part of your project or not.   By running
#  a test,  it can return a true/false value before you attempt to load a file.
#
#  There are two statements you can use:
#
#     returned = RPG::Cache.test_1(type, filename)
#     returned = RPG::Cache.test_2(type, filename)
#
#  The first one, test_1, is designed to work with cache files that don't pass
#  a hue value... like pictures, icons and the like.   The second one, test_2,
#  is designed to check for images that that have a hue value attached to them
#  such as charactersets, battlers and so forth.  You don't need to pass a hue
#  value... it's just checking to see the file exists.
#
#  EX:  returned = RPG::Cache.test_1('tileset', '001-Grassland01')
#
#  You must work with the names of the cache types  as noted in the RPG::Cache
#  system, but it should work with custom cache folders of your own design.
#
#
#==============================================================================
#
#  TERMS AND CONDITIONS:
#
#  Just due credit for this one.  It'a free to use, even in commercial games.
#
#==============================================================================



#==============================================================================
# ** RPG::Cache
#------------------------------------------------------------------------------
#  This is a module that loads each of RPGXP's graphic formats, creates a
#  Bitmap object, and retains it.
#==============================================================================

module RPG::Cache
  #--------------------------------------------------------------------------
  # * Test Cache File #1 (no hue option)
  #     type     : cache type (autotile, icon, picture, etc.)
  #     filename : filename of the cached bitmap
  #--------------------------------------------------------------------------  
  def self.test_1(type, filename)
    failed = false
    begin
      bitmap = eval("self.#{type}(filename)")
    rescue Errno::ENOENT      
      failed = true
    end
    return !failed
  end
  #--------------------------------------------------------------------------
  # * Test Cache File #2 (existing hue option)
  #     type     : cache type (character, battler, panorama, etc.)
  #     filename : filename of the cached bitmap
  #--------------------------------------------------------------------------  
  def self.test_2(type, filename)
    failed = false
    begin
      bitmap = eval("self.#{type}(filename, 0)")
    rescue Errno::ENOENT      
      failed = true
    end
    return !failed
  end
end

Instructions
Pretty much in the script.



Terms and Conditions
Just due credit for this one. It'a free to use, even in commercial games.

[deValdr]

This is extremely useful and provides some interesting code. Great work

[Ace]

Really nice, I will use it if I ever get back to my project^^