|
Purpose |
Copy and resize a
bitmap to the
XPRINT page. |
|
Syntax |
XPRINT STRETCH hBmp,
ID, (x1,y1)-(x2,y2) TO (x3,y3)-(x4,y4) [,Mix,
Stretch]
XPRINT STRETCH PAGE hBmp, ID
[, Mix, Stretch] |
|
Remarks |
You can copy a complete bitmap, or a portion of
it, to the XPRINT page, while resizing it to a larger or smaller size.
The
variable hBmp specifies the handle
of the source bitmap or window.
The parameter ID is the
(1 to 65535) assigned with CONTROL ADD
GRAPHIC. ID
must be zero (0) for a GRAPHIC
WINDOW or a
GRAPHIC BITMAP
. The
destination of the stretch operation is always the attached
XPRINT page. The
bitmap is automatically resized to fit the destination parameters. You
must use care that your parameters are valid for the specified bitmaps,
or result of the operation is undefined.
The second form, XPRINT STRETCH PAGE, is a shortcut
for copying a complete bitmap to the clip
or client area of the host
printer page. The image is automatically stretched or condensed to fit
the target appropriately. |
|
Mix |
If the Mix parameter is included, it is one of the
values in the following table. If
not specified, a default of %MIX_COPYSRC is presumed. There
are 16 mix modes available to use for mixing drawing colors with the colors
which already exist at the at the drawing location. The
mix mode equates are predefined in PowerBASIC.
|
%mix_Blackness |
Pixel is always 0 (black). |
|
%mix_NotMergeSrc |
Pixel is the inverse of
the MergeSrc color. |
|
%mix_MaskNotSrc |
Pixel is a combination
of the colors common to both the pixel and the inverse of the source. |
|
%mix_NotCopySrc |
Pixel is the inverse of
the pen color. |
|
%mix_MaskSrcNot |
Pixel is a combination
of the colors common to both the source and the inverse of the pixel. |
|
%mix_Not |
Pixel is the inverse of
the pixel color. |
|
%mix_XorSrc |
Pixel is a combination
of the colors in the source and in the pixel, but not in both. |
|
%mix_NotMaskSrc |
Pixel is the inverse of
the MaskSrc color. |
|
%mix_MaskSrc |
Pixel is a combination
of the colors common to both the source and the pixel. |
|
%mix_NotXorSrc |
Pixel is the inverse of
the XorSrc color. |
|
%mix_Nop |
Pixel remains unchanged. |
|
%mix_MergeNotSrc |
Pixel is a combination
of the source color and the inverse of the pixel color. |
|
%mix_CopySrc |
Pixel is the source color
(default). |
|
%mix_MergeSrcNot |
Pixel is a combination
of the source color and the inverse of the pixel color. |
|
%mix_MergeSrc |
Pixel is a combination
of the source color and the pixel color. |
|
%mix_Whiteness |
Pixel is always 1 (white). |
|
|
Stretch |
If the Stretch parameter is included, it is one
of the values in the following table. If
not included, or it is the value zero (0), the stretch mode is unchanged.
An appropriate
choice of stretch mode can substantially enhance the quality of bitmaps
which are changed in size. The
stretch mode equates are predefined in PowerBASIC.
|
%BLACKONWHITE |
1 |
This is the default Windows
stretch mode, and is most appropriate for monochrome bitmaps, or those
with blocks of color. Performs
a boolean OR of eliminated and existing pixels. It
preserves black pixels at the expense of white pixels. |
|
%WHITEONBLACK |
2 |
Performs a boolean OR of
eliminated and existing pixels. It
preserves white pixels at the expense of black pixels. |
|
%COLORONCOLOR |
3 |
Deletes eliminated lines
of pixels without trying to preserve their information. |
|
%HALFTONE |
4 |
This provides the highest
quality for complex color bitmaps. The
average color of the destination pixel block is kept approximately the
same as the source pixel block. |
|
|
See also |
XPRINT
COPY, XPRINT RENDER, XPRINT SET MIX, XPRINT
SET STRETCHMODE |
