在alchemy c中進(jìn)行圖片的縮放
傳進(jìn)的是byteArray 傳出的也是byteArray 千萬不要在alchemy c 中對(duì)as的對(duì)象進(jìn)行函數(shù)調(diào)用 那樣速度很慢.... 達(dá)不到煉金術(shù)的效果...
好吧 代碼 自己看吧 還是比較簡單的
alchemy c 代碼#include <iostream>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <math.h>#include "AS3.h"typedef unsigned int uint;#define MAXV 4using namespace std;double SinXDivX(double x) { double a = -1; if (x < 0) x = -x; double x2 = x * x; double x3 = x2 * x; if (x <= 1) return (a + 2) * x3 - (a + 3) * x2 + 1; else if (x <= 2) return a * x3 - 5 * a * x2 + 8 * a * x - 4 * a; return 0;}uint availablePixel(uint *src, int srcWidth, int srcHeight, int x, int y) { bool flag = true; if (x < 0) { x = 0; flag = false; } else if (x >= srcWidth) { x = srcWidth - 1; flag = false; } if (y < 0) { y = 0; flag = false; } else if (y >= srcHeight) { y = srcHeight - 1; flag = false; } int lenth = srcWidth * srcHeight; int in = x + y*srcWidth; uint ret = src[in]; if (!flag) ret = ret & 0x00ffffff; return ret;}uint border_color(double Color) { if (Color <= 0) return uint(0); if (Color >= 255) return uint(255); return uint(Color);}char *strreverse(char *a) { char r[10] = { 0 }; int i, j; for (i = 0, j = strlen(a) - 1; a[i]; ++i, --j) { r[j] = a[i]; } return r;}char *toString(uint val) { char a[10] = { 0 }; char ch[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; int i = 0, rt; if (val == 0) a[0] = '0'; while (val) { rt = val % 16; val >>= 4; a[i++] = ch[rt]; } return strreverse(a);}uint MatrixMutiple(double a[], uint b[][MAXV], double c[], int ii, int jj) { int i, j, k, z; double tp[MAXV], ret[MAXV], ttp[MAXV]; memset(ret, 0.0, sizeof(ret)); for (i = 0; i < MAXV; ++i) { memset(tp, 0.0, sizeof(tp)); for (j = 0; j < MAXV; ++j) { tp[0] += a[j] * (b[j][i] >> 24); tp[1] += a[j] * ((b[j][i] & 0x00ffffff) >> 16); tp[2] += a[j] * ((b[j][i] & 0x0000ffff) >> 8); tp[3] += a[j] * (b[j][i] & 0x000000ff); } for (k = 0; k < MAXV; ++k) { ret[k] += c[i] * tp[k]; } } uint af1 = border_color(ret[0] + 0.5) << 24; uint r1 = border_color(ret[1] + 0.5) << 16; uint g1 = border_color(ret[2] + 0.5) << 8; uint b1 = border_color(ret[3] + 0.5); return af1 + r1 + g1 + b1;}void echo(uint *val, int len) { int i = 0; for (i = 0; i < len; ++i) { AS3_Trace(AS3_String(toString(val[i]))); }}static AS3_Val biCubic(void* self, AS3_Val args) { AS3_Val srcByte, dstByte; int srcWidth, srcHeight, dstWidth, dstHeight; AS3_ArrayValue(args, "AS3ValType, IntType, IntType, AS3ValType, IntType, IntType", &srcByte, &srcWidth, &srcHeight, &dstByte, &dstWidth, &dstHeight); int srcLen = srcWidth * srcHeight; int dstLen = dstWidth * dstHeight; uint *src = new uint[srcLen]; uint *dst = new uint[dstLen]; AS3_SetS(srcByte, "position", AS3_Int(0)); AS3_ByteArray_readBytes(src, srcByte, 4 * srcLen); double widthFactor = 1.0 * srcWidth / dstWidth; double heightFactor = 1.0 * srcHeight / dstHeight; int i, j, k, z, gf = 0; double tx, ty, u, v; int x, y; double A[MAXV], C[MAXV]; uint B[MAXV][MAXV]; for (i = 0; i < dstWidth; ++i) { for (j = 0; j < dstHeight; ++j) { tx = (i + 0.5) * widthFactor - 0.5; ty = (j + 0.5) * heightFactor - 0.5; if (tx < 0) tx = -tx; if (ty < 0) ty = -ty; x = floor(tx); y = floor(ty); u = tx - x; v = ty - y; for (k = 0; k < MAXV; ++k) { A[k] = SinXDivX(u + 1.0 - k); C[k] = SinXDivX(v + 1.0 - k); for (z = 0; z < MAXV; ++z) { B[k][z] = availablePixel(src, srcWidth, srcHeight, x + k - 1, y + z - 1); } } dst[i+j*dstWidth] = MatrixMutiple(A, B, C, i, j); } } //echo(dst, dstLen);
AS3_SetS(dstByte, "position", AS3_Int(0)); AS3_ByteArray_writeBytes(dstByte, dst, 4 * dstLen); return AS3_True();}int main() { AS3_Val biCubicMethod = AS3_Function(NULL, biCubic); AS3_Val lib = AS3_Object("biCubic:AS3ValType", biCubicMethod); AS3_Release(biCubicMethod); AS3_LibInit(lib); return 0;}as 代碼package {
import cmodule.ImageScaling.CLibInit;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.display.StageScaleMode;
import flash.geom.Rectangle;
import flash.utils.ByteArray;
import flash.utils.Timer;
[SWF(width="1000", height="600", backgroundColor="#000000", frameRate="24")]
public class Main extends Sprite {
[Embed(source='f_01.png')]
public static const image:Class;
public function Main() {
this.stage.scaleMode = StageScaleMode.NO_SCALE;
var bitmapdata:BitmapData = (new image() as Bitmap).bitmapData;
var t1:Number = (new Date()).time;
var bitmap:Bitmap = new Bitmap(Main.Cubic(bitmapdata, 256, 256));
var t2:Number = (new Date()).time;
trace((t2-t1)+"ms");
this.addChild(bitmap);
}
public static function Cubic (bitmapData:BitmapData, scalingWidth:uint, scalingHeight:uint):BitmapData {
var nbd:BitmapData = new BitmapData(scalingWidth, scalingHeight, true, 0xffffffff);
var loader:cmodule.ImageScaling.CLibInit = new cmodule.ImageScaling.CLibInit();
var lib:Object = loader.init();
var byte:ByteArray = bitmapData.getPixels(new Rectangle(0, 0, bitmapData.width, bitmapData.height));
var byte2:ByteArray = nbd.getPixels(new Rectangle(0, 0, scalingWidth, scalingHeight));
lib.biCubic(byte, bitmapData.width, bitmapData.height, byte2, scalingWidth, scalingHeight);
byte2.position = 0;
nbd.setPixels(new Rectangle(0, 0, scalingWidth, scalingHeight), byte2);
return nbd;
}
}
}