Rotate and Sprite MMX ASM functions 1.0 |
Version: 1.0 |
Shareware By: Alexey Zverev |
| Downloads: 41 Hits: 608 |
Source: NO |
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Description of Rotate and Sprite MMX ASM functions :
This is module with two very useful graphical functions: rotate and sprite images. They are written on assembler with MMX instructions and optimization. It increases performance of these procedures fourfold versus using CPU and FPU.
functions:
Rotate(Matrix, Src, Dest: Pointer; Width, Height: Integer; RotateX, RotateY: Integer);
Matrix - sin/cos matrix
Matrix[1, 1] := Round(Cos(Angle * PI / 180) * 16384);
Matrix[2, 1] := Round(Sin(Angle * PI / 180) * 16384);
Matrix[1, 2] := - Matrix[2, 1];
Matrix[2, 2] := Matrix[1, 1];
Src - source bitmap
Dest - destination bitmap
Width - width of source bitmap
Height - height of source bitmap
RotateX, RotateY - center of rotating
PlaceSprite(Picture, Sprite, BackgroundColor, PictureWidth, PictureHeight, SpriteWidth, SpriteHeight, StartX, StartY);
Picture - sorce bitmap; here will be stored result
Sprite - sprite bitmap
BackgroundColor - transparent color for sprite bitmap
PictureWidth - source bitmap width
PictureHeight - source bitmap height
SpriteWidth - sprite bitmap width
SpriteHeight - sprite bitmap height
StartX, StartY - left-top point for placing sprite on source bitmap
If you have any questions feel free to ask developer at alzv@softhome.net
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