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note description: "Defines the dimensions and color information for a Windows device-independent bitmap (DIB)." legal: "See notice at end of class." status: "See notice at end of class." date: "$Date: 2017-04-10 00:03:05 -0800 (Mon, 10 Apr 2017) $" revision: "$Revision: 100121 $" class interface WEL_BITMAP_INFO create make (a_bitmap_info_header: WEL_BITMAP_INFO_HEADER; a_rgb_quad_count: INTEGER_32) -- Make a BITMAPINFO structure -- with a_bitmap_info_header require a_bitmap_info_header_not_void: a_bitmap_info_header /= Void a_bitmap_info_header_exists: a_bitmap_info_header.exists positive_rgb_quad_count: a_rgb_quad_count >= 0 make_by_dc (dc: WEL_DC; bitmap: WEL_BITMAP; usage: INTEGER_32) -- Make a bitmap info structure using dc and -- bitmap. -- See class WEL_DIB_COLORS_CONSTANTS for usage -- values. require dc_not_void: dc /= Void dc_exists: dc.exists bitmap_not_void: bitmap /= Void bitmap_exists: bitmap.exists valid_usage: valid_dib_colors_constant (usage) make_by_pointer (a_pointer: POINTER) -- Set item with a_pointer. -- Since item is shared, it does not need -- to be freed. -- Caution: a_pointer must be a pointer -- coming from Windows. -- (from WEL_ANY) ensure -- from WEL_ANY item_set: item = a_pointer shared: shared feature -- Access Dib_pal_colors: INTEGER_32 = 1 -- (from WEL_DIB_COLORS_CONSTANTS) Dib_rgb_colors: INTEGER_32 = 0 -- (from WEL_DIB_COLORS_CONSTANTS) generating_type: TYPE [detachable WEL_BITMAP_INFO] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty header: WEL_BITMAP_INFO_HEADER -- Information about the dimensions and color -- format of a DIB require exists: exists ensure result_not_void: Result /= Void item: POINTER -- Generic Windows handle or structure pointer. -- Can be a HWND, HICON, RECT *, WNDCLASS *, etc... -- (from WEL_ANY) rgb_quad (index: INTEGER_32): WEL_RGB_QUAD -- Bitmap color at zero-based index require exists: exists index_small_enough: index < rgb_quad_count index_large_enough: index >= 0 ensure result_not_void: Result /= Void rgb_quad_count: INTEGER_32 -- Number of colors rgb_quad_natural (index: INTEGER_32): NATURAL_32 -- Bitmap color at zero-based index require exists: exists index_small_enough: index < rgb_quad_count index_large_enough: index >= 0 feature -- Measurement structure_size: INTEGER_32 -- Size to allocate (in bytes) ensure -- from WEL_STRUCTURE positive_result: Result > 0 feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal (other: WEL_BITMAP_INFO): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal (other: WEL_BITMAP_INFO): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void exists: BOOLEAN -- Does the item exist? -- (from WEL_ANY) ensure -- from WEL_ANY Result = (item /= default_pointer) same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) shared: BOOLEAN -- Is item shared by another object? -- If False (by default), item will -- be destroyed by destroy_item. -- If True, item will not be destroyed. -- (from WEL_ANY) valid_dib_colors_constant (c: INTEGER_32): BOOLEAN -- Is c a valid dib colors constant? -- (from WEL_DIB_COLORS_CONSTANTS) feature -- Status setting set_shared -- Set shared to True. -- (from WEL_ANY) ensure -- from WEL_ANY shared: shared set_unshared -- Set shared to False. -- (from WEL_ANY) ensure -- from WEL_ANY unshared: not shared feature -- Element change set_bitmap_info_header (a_header: WEL_BITMAP_INFO_HEADER) -- Set header with a_header. require exists: exists a_header_not_void: a_header /= Void a_header_exists: a_header.exists set_item (an_item: POINTER) -- Set item with an_item -- (from WEL_ANY) ensure -- from WEL_ANY item_set: item = an_item set_rgb_quad (index: INTEGER_32; a_rgb_quad: WEL_RGB_QUAD) -- Set rgb_quad with a_rgb_quad at -- zero-based index. require index_small_enough: index < rgb_quad_count index_large_enough: index >= 0 a_rgb_quad_not_void: a_rgb_quad /= Void a_rgb_quad_exists: a_rgb_quad.exists feature -- Removal dispose -- Destroy the inner structure of Current. -- -- This function should be called by the GC when the -- object is collected or by the user if Current is -- no more usefull. -- (from WEL_ANY) feature -- Duplication frozen deep_copy (other: WEL_BITMAP_INFO) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: WEL_BITMAP_INFO -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: WEL_BITMAP_INFO) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: WEL_BITMAP_INFO -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: WEL_BITMAP_INFO -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations copy (other: WEL_BITMAP_INFO) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from WEL_STRUCTURE) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen default: detachable WEL_BITMAP_INFO -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class initialize -- Fill Current with zeros. -- (from WEL_STRUCTURE) require -- from WEL_STRUCTURE exists: exists initialize_with_character (a_character: CHARACTER_8) -- Fill current with a_character. -- (from WEL_STRUCTURE) require -- from WEL_STRUCTURE exists: exists is_equal (other: WEL_BITMAP_INFO): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from WEL_STRUCTURE) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result memory_copy (source_pointer: POINTER; length: INTEGER_32) -- Copy length bytes from source_pointer to item. -- (from WEL_STRUCTURE) require -- from WEL_STRUCTURE length_small_enough: length <= structure_size length_large_enough: length > 0 exists: exists feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void invariant -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2013, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class WEL_BITMAP_INFO
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