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TA的每日心情 | 擦汗 2018-4-10 15:18 |
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签到天数: 447 天 [LV.9]以坛为家II
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在alchemy c中进行图片的缩放
传进的是byteArray 传出的也是byteArray 千万不要在alchemy c 中对as的对象进行函数调用 那样速度很慢.... 达不到炼金术的效果...
好吧 代码 自己看吧 还是比较简单的
alchemy c 代码
- #include <iostream>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <math.h>
- #include "AS3.h"
- typedef unsigned int uint;
- #define MAXV 4
- using 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;
- }
复制代码
as 代码
- 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;
- }
- }
- }
复制代码
本文来自:http://www.cppblog.com/misschuer/archive/2012/08/10/186801.aspx
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