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Use the FREBitmapData or FREBitmapData2 structures when acquiring
and manipulating the bits in an ActionScript BitmapData class object.
The FREBitmapData structure is defined as follows:
typedef struct {
uint32_t width;
uint32_t height;
uint32_t hasAlpha;
uint32_t isPremultiplied;
uint32_t lineStride32;
uint32_t* bits32;
} FREBitmapData;
The fields of FREBitmapData have the following meanings:
-
width
-
A uint32_t that specifies the width, in pixels, of the bitmap.
This value corresponds to the
width
property of
the ActionScript BitmapData class object. This field is read-only.
-
height
-
A uint32_t that specifies the height, in pixels, of the bitmap.
This value corresponds to the
height
property of
the ActionScript BitmapData class object. This field is read-only.
-
hasAlpha
-
A uint32_t that indicates whether the bitmap supports per-pixel transparency.
This value corresponds to the
transparent
property
of the ActionScript BitmapData class object. If the value is non-zero,
then the pixel format is
ARGB32
. If the value is
zero, the pixel format is
_RGB32
. Whether the value
is big endian or little endian depends on the host device. This
field is read-only.
-
isPremultiplied
-
A uint32_t that indicates whether the bitmap pixels are stored as
premultiplied color values. A non-zero value means the values
are
premultipled.
This field is read-only. For more information about premultiplied
color values, see BitmapData.getPixel() in the
ActionScript 3.0 Reference for the Adobe Flash
Platform
.
-
lineStride32
-
A uint32_t that specifies the number of uint32_t values per scanline.
This value is typically the same as the
width
parameter.
This field is read-only.
-
bits32
-
A pointer to a uint32_t. This value is an array of uint32_t
values. Each value is one pixel of the bitmap.
Note:
The only field of a
FREBitmapData
structure
that you can change in the native implementation is the
bits32
field.
The
bits32
field contains the actual bitmap values.
Treat all the other fields in the
FREBitmapData
structure
as read-only fields.
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