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Sequential.cpp
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Sequential.cpp
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#pragma comment(lib, "Gdiplus.lib")
#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include <direct.h> // Get cwd
#include <gdiplus.h>
#include "mpi.h"
using namespace Gdiplus;
#define EDGE_PIXEL_NUM 400 // Aka. display_width
#define COLOR_LEVEL_MAX 255
#define BMP_PATH L"DemoMPI.bmp"
struct Complex { // Define complex number with some operations
float real;
float imag;
Complex() : real(0.0), imag(0.0) {}
Complex(float r, float i) : real(r), imag(i) {}
Complex operator+(const Complex& other) { // complex + complex
return Complex(this->real + other.real, this->imag + other.imag);
}
Complex operator-(const Complex& other) { // complex - complex
return Complex(this->real - other.real, this->imag - other.imag);
}
Complex operator*(const Complex& other) { // complex * complex
Complex result;
result.real = this->real * other.real - this->imag * other.imag;
result.imag = this->imag * other.real + this->real * other.imag;
return result;
}
Complex operator+(const float& num) { // complex + float
return Complex(this->real + num, this->imag);
}
Complex operator-(const float& num) { // complex + float
return Complex(this->real - num, this->imag);
}
Complex operator*(const float& num) { // complex * float
return Complex(this->real * num, this->imag * num);
}
Complex operator/(const float& num) { // complex / float
return Complex(this->real / num, this->imag / num);
}
float lenSq() { // Calculate the squared length of complex
return (this->real * this->real + this->imag * this->imag);
}
};
struct ComplexPlane {
Complex lu; // left up
Complex ru; // right up
Complex lb; // left bottom
Complex rb; // right bottom
ComplexPlane(Complex luCoord, Complex size) {
this->lu = luCoord;
this->ru = this->lu + size.real;
this->lb = this->lu + size.imag;
this->rb = this->ru + size;
}
};
enum Tag {
TAG_INFO,
TAG_DATA,
TAG_STOP
};
/* Function Declarition */
int calculatePixel(Complex startPoint, float scaleW, int indexW, float scaleH, int indexH);
int saveAsBmpFile(int w, int h, BYTE* pixelData); // Save pixelData as BMP to BMP_PATH
int main(int argc, char* argv[])
{
// Complex plane
Complex complexPlaneLU(-2.0, -2.0);
Complex complexPlaneSize(4.0, 4.0);
ComplexPlane complexPlane(complexPlaneLU, complexPlaneSize);
// Mapping scales
float scaleW = complexPlaneSize.real / EDGE_PIXEL_NUM;
float scaleH = complexPlaneSize.imag / EDGE_PIXEL_NUM;
LARGE_INTEGER timeFreq, timeStart, timeEnd;
QueryPerformanceFrequency(&timeFreq);
QueryPerformanceCounter(&timeStart);
// Sequential
/* BEGIN --------------------------------------------------------------- */
BYTE* bmpData = new BYTE[EDGE_PIXEL_NUM * EDGE_PIXEL_NUM];
for (int i = 0; i < EDGE_PIXEL_NUM; i ++) {
for (int j = 0; j < EDGE_PIXEL_NUM; j ++) {
bmpData[j * EDGE_PIXEL_NUM + i] = calculatePixel(complexPlane.lu, scaleW, i, scaleH, j); // Set pixel data
}
}
saveAsBmpFile(EDGE_PIXEL_NUM, EDGE_PIXEL_NUM, bmpData);
delete[]bmpData;
QueryPerformanceCounter(&timeEnd);
double timeDiff = (double)(timeEnd.QuadPart - timeStart.QuadPart) / (double)timeFreq.QuadPart;
printf("Sequential[1]: Run for %fs.\n", timeDiff);
/* END ----------------------------------------------------------------- */
return 0;
}
int calculatePixel(Complex planeOrigin, float scaleW, int indexW, float scaleH, int indexH) {
Complex offset(scaleW * indexW, scaleH * indexH);
Complex c = planeOrigin + offset; // Mapping
int count = 0;
Complex z(0.0, 0.0);
do {
z = z * z + c;
count ++;
} while (z.lenSq() < 4.0 && count < COLOR_LEVEL_MAX);
return count;
}
/* Generate grayscale BMP file from pixel data */
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
{
UINT num = 0; // number of image encoders
UINT size = 0; // size of the image encoder array in bytes
ImageCodecInfo* pImageCodecInfo = NULL;
GetImageEncodersSize(&num, &size);
if (size == 0)
return -1; // Failure
pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
if (pImageCodecInfo == NULL)
return -1; // Failure
GetImageEncoders(num, size, pImageCodecInfo);
for (UINT j = 0; j < num; ++j)
{
if (wcscmp(pImageCodecInfo[j].MimeType, format) == 0)
{
*pClsid = pImageCodecInfo[j].Clsid;
free(pImageCodecInfo);
return j; // Success
}
}
free(pImageCodecInfo);
return -1; // Failure
}
int saveAsBmpFile(int w, int h, BYTE* pixelData) {
// Initialize GDI+.
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
int paletteCount = 256;
ColorPalette* palette = (ColorPalette*)malloc(2 * sizeof(UINT) + paletteCount * sizeof(ARGB));
palette->Flags = PaletteFlags::PaletteFlagsGrayScale;
palette->Count = paletteCount;
for (int i = 0; i < 256; i ++) {
palette->Entries[i] = Color::MakeARGB(1, i, i, i);
}
CLSID encoderClsid;
Status stat;
Bitmap* bitmap = new Bitmap(w, h, w, PixelFormat8bppIndexed, pixelData);
bitmap->SetPalette(palette);
// Get the CLSID of the PNG encoder.
GetEncoderClsid(L"image/bmp", &encoderClsid);
stat = bitmap->Save(L"Mandelbrot.bmp", &encoderClsid, NULL);
if (stat == Ok) {
char cwd[1024];
printf("BMP was generated at: %s\\Mandelbrot.bmp\n", _getcwd(cwd, 1023));
} else {
printf("Failure: stat = %d\n", stat);
}
delete bitmap;
GdiplusShutdown(gdiplusToken);
free(palette);
return 0;
}