_BITMAP Struct Reference
[Bitmap structure]

#include <gdi.h>

Data Fields

• Uint8 bmType
• Uint8 bmBitsPerPixel
• Uint8 bmBytesPerPixel
• Uint8 bmAlpha
• Uint32 bmColorKey
• Uint32 bmWidth
• Uint32 bmHeight
• Uint32 bmPitch
• Uint8 * bmBits
• Uint8 * bmAlphaMask
• Uint32 bmAlphaPitch

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Detailed Description

Expanded device-dependent bitmap structure.

Definition at line 7365 of file gdi.h.

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Field Documentation

Uint8 bmAlpha

The alpha channel value.

Definition at line 7402 of file gdi.h.

Uint8* bmAlphaMask

The private pixel format The Alpha Mask array of the bitmap

Definition at line 7421 of file gdi.h.

Uint32 bmAlphaPitch

The Alpha Pitch of the bitmap

Definition at line 7424 of file gdi.h.

Uint8* bmBits

The bits of the bitmap

Definition at line 7416 of file gdi.h.

Uint8 bmBitsPerPixel

The bits per piexel.

Definition at line 7398 of file gdi.h.

Uint8 bmBytesPerPixel

The bytes per piexel.

Definition at line 7400 of file gdi.h.

Uint32 bmColorKey

The color key value.

Definition at line 7404 of file gdi.h.

Uint32 bmHeight

The height of the bitmap

Definition at line 7412 of file gdi.h.

Uint32 bmPitch

The pitch of the bitmap

Definition at line 7414 of file gdi.h.

Uint8 bmType

Bitmap types, can be OR'ed by the following values:

• BMP_TYPE_NORMAL
  A nomal bitmap, without alpha and color key.
• BMP_TYPE_RLE
  A RLE (run-length-encode) encoded bitmap. The encoding translates the pixel data to a stream of segments of the form

<skip> <run> <data>

where <skip> is the number of transparent pixels to skip, <run> is the number of opaque pixels to blit, and <data> are the pixels themselves.

Encoded pixels always have the same format as the BITMAP. <skip> and <run> are unsigned 8 bit integers, except for 32 bit depth where they are 16 bit. This makes the pixel data aligned at all times. Segments never wrap around from one scan line to the next. The end of one segment is marked by a zero <skip>,<run> pair.

• BMP_TYPE_ALPHA
  Per-pixel alpha in the bitmap.
• BMP_TYPE_ALPHACHANNEL
  The bmAlpha is a valid alpha channel value.
• BMP_TYPE_COLORKEY
  The bmColorKey is a valid color key value.
• BMP_TYPE_ALPHA_MASK
  The bitmap have a private Alpha Mask array.

Definition at line 7396 of file gdi.h.

Uint32 bmWidth

The width of the bitmap

Definition at line 7410 of file gdi.h.

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The documentation for this struct was generated from the following file:

• gdi.h