Unit GR32

The GR32 unit is the core foundation of the Graphics32 library. It contains the primary data structures, 32-bit ARGB color definitions (TColor32), base bitmap classes (TBitmap32, TCustomBitmap32), and global pixel utility routines.

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The complete list of types and functions in GR32 is too big to list here, but here are some of the more important ones:

Classes

Class	Description
TBitmap32	Primary 32-bit ARGB bitmap container class.
TCustomBitmap32	Abstract base class for 32-bit bitmaps with backend rendering support.
TCustomSampler	Abstract base class for pixel color sampling algorithms.
TCustomResampler	Abstract base class for bitmap pixel resampling and interpolation.

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Types & Constants

TColor32 & TColor32Entry

type
  TColor32 = type Cardinal;

  TColor32Entry = packed record
    case Integer of
      0: (B, G, R, A: Byte); // or (R, G, B, A: Byte) depending on the platform
      1: (ARGB: TColor32);
      2: (Planes: array[0..3] of Byte);
      3: (Components: array[TColor32Component] of Byte);
  end;

A 32-bit unsigned integer holding ARGB color components.

Common Color Constants

• clNone32: No color = $000000 (fully transparent black)
• clBlack32: Opaque Black
• clWhite32: Opaque White
• clRed32: Opaque Red
• clGreen32: Opaque Green
• clBlue32: Opaque Blue
• clTrWhite32: 50% transparent White
• clTrRed32: 50% transparent Red
• clTrGreen32: 50% transparent Green
• clTrBlue32: 50% transparent Blue etc...

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Global Functions

• Color32(A, R, G, B: Byte): TColor32: Constructs a TColor32 value from individual byte components.
• Color32(WinColor: TColor): TColor32: Constructs a TColor32 value from a VCL TColor value.