fastbmp
所属分类：Pascal/Delphi编程
开发工具：Delphi
文件大小：111KB
下载次数：21
上传日期：2014-04-17 15:35:34
上 传 者：
457273
说明： delphi 快速图像处理代码，修改版，可用于多版本delphi 。
(delphi fast write hooks, and write very well.)
文件列表:
TFastBmp\Demo\fastbmp.bmp (77880, 1999-01-19)
TFastBmp\Demo\sample.bmp (77880, 1999-01-19)
TFastBmp\Demo\Source\Project1.dpr (679, 1999-01-19)
TFastBmp\Demo\Source\Unit1.dfm (3181, 1999-01-19)
TFastBmp\Demo\Source\Unit1.pas (6942, 1999-01-20)
TFastBmp\Demo\Source\Unit2.dfm (1048, 1999-01-19)
TFastBmp\Demo\Source\Unit2.pas (1397, 1999-01-19)
TFastBmp\Demo\Source\Unit3.dfm (1326, 1999-01-19)
TFastBmp\Demo\Source\Unit3.pas (2037, 1999-01-19)
TFastBmp\Demo\Source\Unit4.dfm (994, 1999-01-19)
TFastBmp\Demo\Source\Unit4.pas (1395, 1999-01-19)
TFastBmp\Demo\Source\Unit5.dfm (1413, 1999-01-19)
TFastBmp\Demo\Source\Unit5.pas (2023, 1999-01-19)
TFastBmp\Demo\Source\Unit6.dfm (1428, 1999-01-19)
TFastBmp\Demo\Source\Unit6.pas (2139, 1999-01-19)
TFastBmp\Demo\Source\Unit7.dfm (1499, 1999-01-19)
TFastBmp\Demo\Source\Unit7.pas (1635, 1999-01-19)
TFastBmp\FastBMP.pas (10535, 1999-01-14)
TFastBmp\FastFX.pas (32145, 1999-01-20)
TFastBmp\FastRGB.pas (1203, 1999-01-20)
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e (* ì* * T * e Times New Roman Symbol Arial Arial 0 Courier New Times New Roman TFastBMP v1.0
G. Alex Cowie
www.jps.net/gfody
1-20-***:
This version has completely new architecture. TFastBMP is a descendant of TFastRGB to make way for upcoming TFastDDB (direct draw bitmap). The scanlines read/write method has been replaced with a smart pixels property. All effects are in FastFX.pas (compatible with anything derrived from TFastRGB).
Types
TFColor = record b,g,r:Byte end;
PFColor = ^TFColor;
TLine = array[0..0]of TFColor;
PLine = ^TLine;
TPLines = array[0..0]of PLine;
PPLines = ^TPLines;
Properties
Width : Integer Width of Bitmap
Height : Integer Height of Bitmap
Pixels : PPLines Modified pointer to bits (pixels[y,x] accessable)
Gap : Integer Size of buffer between scanlines
RowInc : Integer Space between scanlines
Bits : Pointer Pointer to Bits
Size : Integer Size of Bits
Handle : Integer Handle of Bitmap
hDC : Integer GDI surface of Bitmap
bmInfo : TBITMAPINFO
bmHeader : TBITMAPINFOHEADER
Methods
constructors
Create(cx,cy:Integer);
CreateFromFile(lpFile:string);
CreateFromhBmp(hBmp:Integer);
CreateFromRes(Inst:Integer;Name:string);
CreateCopy(hBmp:TFastBMP);
gdi routines
Draw(hDst,x,y:Integer);
Stretch(hDst,x,y,cx,cy:Integer);
DrawRect(hDst,x,y,sx,sy,cx,cy:Integer);
TileDraw(hDst,x,y,cx,cy:Integer);
software routines
Resize(Dst:TFastBMP);
SmoothResize(Dst:TFastBMP);
CopyRect(Dst:TFastBMP;x,y,sx,sy,cx,cy:Integer);
Tile(Dst:TFastBMP);
Documentation
Width / Height:
These are the logical width and height of the bitmap, but the actual pixel array is zero base. When accessing the pixels in a loop you should go through 0 to Width-1, or 0 to Height-1.
Pixels:
This pointer has a special structure to allow access to the bits through y,x coordinates. x and y must be variables since its a dynamic array.
Pixels[y] points to the scanline y (PLine)
Pixels[y,x] is the pixel at [y,x] (TFColor)
You should always access the pixels in order, from top to bottom going side to side. This keeps your pointer from jumping all over the place. Example:
for y:=0 to Bmp.Height-1 do
for x:=0 to Bmp.Width-1 do
Bmp.Pixels[y,x].r:=23;
Also note that you must use variables with this property:
Bmp.Pixels[5,7].r:=23; //compile error
y:=5; x:=7;
Bmp.Pixels[y,x].r:=23;
Gap / RowInc:
These are properties to help with incremental and linear access to pixels. There are 3 different ways to access the pixels in your bitmap:
Random Access
For random access to pixels you must use the pixels property.
Linear Access
Use this method when accessing the lines incrementally, but you need random access to the pixels of that line.
var
Line: PLine;
Line:=Bmp.Bits; //initialize pointer (now points to scanline 0)
for y:=0 to Bmp.Height-1 do
begin
for x:=0 to Bmp.Width-1 do
begin
//random access to Line[x]
end;
Line:=Pointer(Integer(Line)+Bmp.RowInc); //move pointer to next line
end;
Incremental Access
This is the fastest method for incremental access to each pixel:
var
PFC: PFColor;
PFC:=Bmp.Bits; //initialize pointer (now points to pixels[0,0])
for y:=0 to Bmp.Height-1 do
begin
for x:=0 to Bmp.Width-1 do
begin
//access to PFC^
Inc(PFC);
end;
PFC:=Pointer(Integer(PFC)+Bmp.Gap); //scoot pointer pass buffer
end;
Bits / Size:
You can copy the bits of one FastBMP to another with CopyMemory:
CopyMemory(Dst.Bits,Bmp.Bits,Dst.Size);
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