Blit from source bitmap to destination rastport.
Source position: agraphics.pas line 2394
function BltBitMaPRastPort( |
const SrcBitMap: PBitMap; |
XSrc: LongInt; |
YSrc: LongInt; |
DestRP: PRastPort; |
XDest: LongInt; |
YDest: LongInt; |
XSize: LongInt; |
YSize: LongInt; |
Minterm: LongWord |
):LongBool; |
SrcBitMap |
|
A pointer to the source bitmap |
XSrc |
|
X offset into source bitmap |
YSrc |
|
Y offset into source bitmap |
DestRP |
|
A pointer to the destination rastport |
XDest |
|
X offset into dest rastport |
YDest |
|
Y offset into dest rastport |
XSize |
|
Width of blit in pixels |
YSize |
|
Height of blit in rows |
Minterm |
|
Minterm to use for this blit see description |
Blits from source bitmap to position specified in destination rastport using minterm.
MinTerm:
How to copy. Most useful values are 0x00C0 for a vanilla copy, 0x0030 to invert the source and then copy or 0x0050 to ignore the source and just invert the destination. If you want to calculate other values, then you must know that channel A is set, if you are inside the rectangle, channel B is the source and channel C is the destination of the rectangle.
| Bit | ABC |
|---|---|
| 0 | 000 |
| 1 | 001 |
| 2 | 010 |
| 3 | 011 |
| 4 | 100 |
| 5 | 101 |
| 6 | 110 |
| 7 | 111 |
So 0x00C0 means: D is set if one is inside the rectangle (A is set) and B (the source) is set and cleared otherwise.
To fill the rectangle, you would want to set D when A is set, so the value is 0x00F0.
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Blit from source bitmap to destination rastport with masking of source image. |
|
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Calls BltBitMap() after accounting for windows |