C++ BMP::SetSize方法代码示例

void PadBMP( BMP& Input , int NewWidth , int NewHeight )
{
// if the NewWidth and NewHight are unchanged, exit

    if( NewWidth  == Input.TellWidth() &&
            NewHeight == Input.TellHeight() )
    {
        return;
    }

// find max range for the copy, so that cropping occurs
// if necessary

    int MaxWidth = Input.TellWidth();
    if( MaxWidth > NewWidth )
    {
        MaxWidth = NewWidth;
    }

    int MaxHeight = Input.TellHeight();
    if( MaxHeight > NewHeight )
    {
        MaxHeight = NewHeight;
    }

// create a temporary image to hold the original pixels

    BMP Temp;
    Temp.SetSize(NewWidth,NewHeight);
    Temp.SetBitDepth( Input.TellBitDepth() );
    int i,j;
    int Difference = Temp.TellHeight() - MaxHeight;
    for( i=0 ; i < MaxWidth ; i++ )
    {
        for( j=0 ; j < MaxHeight ; j++ )
        {
            *Temp(i,j+Difference) = *Input(i,j);
        }
    }

// resize the original image, and recopy the pixels

    Input.SetSize(NewWidth,NewHeight);
    for( i=0 ; i < Input.TellWidth() ; i++ )
    {
        for( j=0 ; j < Input.TellHeight() ; j++ )
        {
            *Input(i,j) = *Temp(i,j);
        }
    }

    Temp.SetSize(1,1);
    Temp.SetBitDepth(24);

    return;
}

static cell AMX_NATIVE_CALL n_FSetImageSize( AMX* amx, cell* params ){
	posx = params[1];
	posy = params[2];
	GlobalImage.CreateStandardColorTable();
	GlobalImage.SetSize(posx,posy);
	return 1;
}

// Utility function which rebuilds an image from a list of pixels
void buildImage(BMP & image, List<RGBApixel> theList, int width, int height) 
{
   if (width * height != theList.length()) {
      cout << "Error: invalid parameters to buildImage.\n";
      return;
   }

   image.SetSize(width, height);
   int x = 0, y = 0;
   theList.front();
   for (int pos = 0; pos < theList.length(); pos++) {
      *image(x,y) = theList.retrieve();

      // move to next pixel position
      x++;
      if (x >= width) {
         x = 0;
         y++;
      }

      // avoid spurious warning message
      if (pos != theList.length() - 1)
         theList.forwardOne();
   }
}

// creates a BMP from a CImage
// assumes all float values have already been scaled to [0.0, 255.0]
BMP * CImage::toBmp()
{
    BMP * bmp = new BMP();
    bmp->SetSize(m_width, m_height);

    // for smaller output file size
    bmp->SetBitDepth(8);
    // 8-bit bitmaps need a color table
    CreateGrayscaleColorTable(*bmp);

    for (int col = 0; col < m_width; col++)
    {
        for (int row = 0; row < m_height; row++)
        {
            // Output is grayscale, so R, G, and B components are equal.
            // ScaleAndDisplayDisparityValues() et. al. in stereo.cpp have already
            //  scaled all float pixel values to [0, 255].
            ebmpBYTE byteVal = (ebmpBYTE) getValue(row, col, 0);
            (* bmp)(col, row)->Red = byteVal;
            (* bmp)(col, row)->Green = byteVal;
            (* bmp)(col, row)->Blue = byteVal;
        }
    }

    
    return bmp;
}

//数组转图像
void array2bmp()
{
    int i,j;
    BMP bmp;
    RGBApixel pix_black={0};//R=0 G=0 B=0为黑色
    RGBApixel pix_white={255,255,255,0};//白色

    bmp.SetSize(3,3);
    bmp.SetBitDepth(1);
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            if(array[i][j]==1)
            {
                bmp.SetPixel( i,  j,pix_black);
            }
            else
            {
                bmp.SetPixel( i,  j,pix_white);
            }
        }
    }

    bmp.WriteToFile("examp_array2bmp.bmp");
    printf("array2bmp suc...\n");
}

bool EasyBMP_Screenshot( const char* FileName )
{
    BMP Output;

    GLsizei viewport[4];
    glGetIntegerv( GL_VIEWPORT , viewport );

    int width = viewport[2] - viewport[0];
    int height = viewport[3] - viewport[1];

    Output.SetSize(width,height);

    GLint swapbytes, lsbfirst, rowlength, skiprows, skippixels, alignment;

    /* Save current pixel store state. */
    glGetIntegerv(GL_UNPACK_SWAP_BYTES, &swapbytes);
    glGetIntegerv(GL_UNPACK_LSB_FIRST, &lsbfirst);
    glGetIntegerv(GL_UNPACK_ROW_LENGTH, &rowlength);
    glGetIntegerv(GL_UNPACK_SKIP_ROWS, &skiprows);
    glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &skippixels);
    glGetIntegerv(GL_UNPACK_ALIGNMENT, &alignment);

    /* Set desired pixel store state. */

    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
    glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    RGBApixel* pixels;
    pixels = new RGBApixel [ Output.TellWidth() * Output.TellHeight() ];
    glReadPixels( viewport[0],viewport[1], width,height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);

    int n=0;
    for( int j=Output.TellHeight()-1 ; j >= 0 ; j-- )
    {
        for( int i=0; i < Output.TellWidth() ; i++ )
        {
            Output(i,j)->Red = (pixels[n]).Blue;
            Output(i,j)->Green = (pixels[n]).Green;
            Output(i,j)->Blue = (pixels[n]).Red;
            n++;
        }
    }

    /* Restore current pixel store state. */
    glPixelStorei(GL_UNPACK_SWAP_BYTES, swapbytes);
    glPixelStorei(GL_UNPACK_LSB_FIRST, lsbfirst);
    glPixelStorei(GL_UNPACK_ROW_LENGTH, rowlength);
    glPixelStorei(GL_UNPACK_SKIP_ROWS, skiprows);
    glPixelStorei(GL_UNPACK_SKIP_PIXELS, skippixels);
    glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);


    Output.WriteToFile( FileName );

    return true;
}

void Camera::raytrace(Node *node, const std::vector<Light*>& lights) {
  BMP output;
  output.SetSize(width,height);
  output.SetBitDepth(24);
  for(int i = 0; i < width; i++) {
    for(int j = 0; j < height; j++) {
      output(i,j)->Red = 0;
      output(i,j)->Green = 0;
      output(i,j)->Blue = 0;
    }
  }

  float aRatio = (float)width/height;

  glm::vec3 xAxis = glm::cross(fwd, up);
  glm::vec3 yAxis = glm::cross(xAxis, fwd);

  float xFov = std::atan(std::tan(yFov) * aRatio);

  xAxis *= std::tan(xFov/2) * glm::length(fwd) / glm::length(xAxis);
  yAxis *= std::tan(yFov/2) * glm::length(fwd) / glm::length(yAxis);

  for(unsigned int j = 0; j < height; j++) {
    std::cout << "\rline " << j << std::flush;
    #pragma omp parallel for
    for(unsigned int i = 0; i < width; i++) {

      // indirect illumination
      glm::vec3 color(0);
      for(int d = 0; d < density; d++) {
        float x = (float(i) + float(rand())/RAND_MAX) / width;
        float y = (float(j) + float(rand())/RAND_MAX) / height;
        std::cout << "dbg " << fwd << " " << xAxis << " " << yAxis << "\n";
        glm::vec3 dir = glm::normalize(fwd + (2*x-1)*xAxis + (1-2*y)*yAxis);
        Ray ray(pos, dir, rayCount, true);

        glm::vec4 dirCol = rayIter(ray, node, lights);
        glm::vec3 mcCol;
        if(dirCol[3] < 1 && mcIter > 0) {
          for(int w = 0; w < mcIter; w++)
            mcCol += rayIter(ray,node);
          mcCol /= float(mcIter);
        } else {
          dirCol[3] = 1;
        }
        color += (1.f - dirCol[3])*mcCol + dirCol[3]*glm::vec3(dirCol);
      }
      color /= float(density);


      output(i,j)->Red = 255.0*glm::clamp(color[0],0.f,1.f);
      output(i,j)->Green = 255.0*glm::clamp(color[1],0.f,1.f);
      output(i,j)->Blue = 255.0*glm::clamp(color[2],0.f,1.f);
    }
  }
  output.WriteToFile(outFile.c_str());
  exit(0);
}

int main( int argc, char *argv[] )
{
    cout << endl
         << "Using EasyBMP Version " << _EasyBMP_Version_ << endl << endl
         << "Copyright (c) by the EasyBMP Project 2005-6" << endl
         << "WWW: http://easybmp.sourceforge.net" << endl << endl;

    BMP Text;
    Text.ReadFromFile("EasyBMPtext.bmp");

    BMP Background;
    Background.ReadFromFile("EasyBMPbackground.bmp");

    BMP Output;
    Output.SetSize( Background.TellWidth() , Background.TellHeight() );
    Output.SetBitDepth( 24 );

    RangedPixelToPixelCopy( Background, 0, Output.TellWidth() - 1,
                            Output.TellHeight() - 1 , 0,
                            Output, 0, 0 );

    RangedPixelToPixelCopyTransparent( Text, 0, 380,
                                       43, 0,
                                       Output, 110, 5,
                                       *Text(0, 0) );

    RangedPixelToPixelCopyTransparent( Text, 0, Text.TellWidth() - 1,
                                       Text.TellWidth() - 1, 50,
                                       Output, 100, 442,
                                       *Text(0, 49) );

    Output.SetBitDepth( 32 );
    cout << "writing 32bpp ... " << endl;
    Output.WriteToFile( "EasyBMPoutput32bpp.bmp" );

    Output.SetBitDepth( 24 );
    cout << "writing 24bpp ... " << endl;
    Output.WriteToFile( "EasyBMPoutput24bpp.bmp" );

    Output.SetBitDepth( 8 );
    cout << "writing 8bpp ... " << endl;
    Output.WriteToFile( "EasyBMPoutput8bpp.bmp" );

    Output.SetBitDepth( 4 );
    cout << "writing 4bpp ... " << endl;
    Output.WriteToFile( "EasyBMPoutput4bpp.bmp" );

    Output.SetBitDepth( 1 );
    cout << "writing 1bpp ... " << endl;
    Output.WriteToFile( "EasyBMPoutput1bpp.bmp" );

    Output.SetBitDepth( 24 );
    Rescale( Output, 'p' , 50 );
    cout << "writing 24bpp scaled image ..." << endl;
    Output.WriteToFile( "EasyBMPoutput24bpp_rescaled.bmp" );

    return 0;
}

bool Image::writeToBMPFile(const std::string & outputFileName)
{
  bool success = true;

  if( m_pixels != NULL )
    {
    // create bitmap image
    BMP outputImage;
    outputImage.SetSize(m_numCols, m_numRows);
    outputImage.SetBitDepth( 24 );

    double maxVal = m_pixels[0];
    double minVal = m_pixels[0];
    // Maximum and minimum values
    for( int i = 1; i < m_numRows * m_numCols; ++i )
      {
      if( m_pixels[i] > maxVal )
        {
        maxVal = m_pixels[i];
        }
      if( m_pixels[i] <= minVal )
        {
        minVal = m_pixels[i];
        }
      }
    for( int r = 0; r < m_numRows; ++r )
      {
      for( int c = 0; c < m_numCols; ++c )
        {
        // get pixel value and clamp between 0 and 255
        double val = 255.0 * (m_pixels[r * m_numCols + c] - minVal) / (maxVal - minVal);

        if( val < 0 )
          {
          val = 0;
          }
        if( val > 255 )
          {
          val = 255;
          }
        // set output color based on mapping
        RGBApixel pixelVal;
        pixelVal.Blue = (int)val; pixelVal.Green = (int)val; pixelVal.Red = (int)val;
        outputImage.SetPixel(c, r, pixelVal);
        }
      }

    // write to file
    success = outputImage.WriteToFile( outputFileName.c_str() );

    }
  else
    {
    success = false;
    }

  return success;
}

bool HBITMAPtoBMP(HDC hDC,HBITMAP hBitmap,BMP& OutputImage)
{
 using namespace std;
 bool output = false;
    
 BITMAPINFO BitInfo;
 ZeroMemory(&BitInfo, sizeof(BITMAPINFO));
 BitInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 
 // get all manner of information from the incoming bitmap

 if(!::GetDIBits(hDC, hBitmap, 0, 0, NULL, &BitInfo, DIB_RGB_COLORS))
 { return false; }
 
 // Set the size and bit depth of the BMP object

 OutputImage.SetSize( BitInfo.bmiHeader.biWidth ,BitInfo.bmiHeader.biHeight );
 OutputImage.SetBitDepth(32);

 // reconfigure BitInfo.bmiHeader such that the resulting bitmap will be 
 // 32 bits per pixel. This is _MUCH_ simpler 
 
 BitInfo.bmiHeader.biBitCount = 32;
 BitInfo.bmiHeader.biCompression = 0;
 BitInfo.bmiHeader.biSizeImage = OutputImage.TellHeight()*OutputImage.TellWidth()*4;
 
 // I don't understand the +5 part here. -- Paul 

// BYTE *pData = new BYTE[BitInfo.bmiHeader.biSizeImage + 5];
// BYTE *pData = new BYTE[Output.TellHeight()*Output.TellWidth()*4+5];
 BYTE *pData = new BYTE [BitInfo.bmiHeader.biSizeImage];
 
 // now get the actual data
    
 if(!::GetDIBits(hDC, hBitmap, 0, BitInfo.bmiHeader.biHeight, pData, &BitInfo, DIB_RGB_COLORS))
 { return false; }
 
 // transfer that data into the BMP object
 
 int i,j;
 int k=0;
 for( j=OutputImage.TellHeight()-1 ; j >= 0 ; j-- )
 {
  for( i=0; i < OutputImage.TellWidth() ; i++ )
  {
   OutputImage(i,j)->Blue = *(pData+k); k++;
   OutputImage(i,j)->Green = *(pData+k); k++;
   OutputImage(i,j)->Red = *(pData+k); k++;
   OutputImage(i,j)->Alpha = *(pData+k); k++;
  }
 }
 
 delete (pData);
 
 return true;
}

void w2f(GlobalMap &globalMap, int i, int j, int size=1025)
{
	char fileName[6] = {'0','0','.','b','m','p'};
	fileName[0]=i+48;
	fileName[1]=j+48;
		
	short z;
		
	RGBApixel color;
	BMP image;
	image.SetSize(size,size);
	image.SetBitDepth(16);

	for(int y=0; y<size; y++)
	{
		for(int x=0; x<size; x++)
		{
			z= globalMap.getLocalMap(i,j)->getHeight(x,y);
			if(z<0)
			{
				color.Red=0;
				color.Green=0;
				color.Blue=(z+32768)/129;
				color.Alpha=0;
			}
			if(z>=0 && z<20000)
			{	
				color.Red=0;
				color.Green=z/134+100;
				color.Blue=0;
				color.Alpha=0;
			}
			if(z>=20000 && z<25000)
			{
				color.Red=(z-20000)/500+200;
				color.Green=(z-20000)/500+200;
				color.Blue=(z-20000)/500+200;
				color.Alpha=0;
			}
			if(z>=25000)
			{
				color.Red=255;
				color.Green=255;
				color.Blue=255;
				color.Alpha=0;
			}
			
			image.SetPixel(x,y, color);
		}
	}

	image.WriteToFile(fileName);
}

void BitmapRawConverter::pixelsToBitmap(char *outFilename) {
    BMP out;
    out.SetSize(width, height);
    out.SetBitDepth(24);

    for (int i = 0; i < width; i++) {
        for (int j = 0; j < height; j++) {
            out.SetPixel(i, j, getPixel(i,j));
        }
    }
    out.WriteToFile(outFilename);
}

void CopyBMP( BMP& Input , BMP& Output )
{
    Output.SetSize( Input.TellWidth() , Input.TellHeight() );

    for( int j=0 ; j < Input.TellHeight() ; j++ )
    {
        for( int i=0 ; i < Input.TellWidth() ; i++ )
        {
            *Output(i,j) = *Input(i,j);
        }
    }
    return;
}

int main(int argc, char** argv) {

    if (argc != 2) {
        cout << "Incorrect input. Please enter the name of the configuration file." << endl; 
        return -1; 
    } 
    Reader * config = new Reader(argv[1]);
    
    int width = config->getWIDTH();
    int height = config->getHEIGHT();
    int x = config->getX();
    int y = config->getY();
    int z = config->getZ();

    Camera * rayGenerator = new Camera(config->getEYEP(), config->getVDIR(), 
                                                config->getUVEC(), config->getFOVY(), width, height);
    BMP output;
    output.SetSize(width, height);
    output.SetBitDepth(24);

    Raymarch * raymarch = new Raymarch(config->getVB(), rayGenerator, config->getEYEP(), 
                                        config->getMRGB(), config->getBRGB(), 
                                        config->getLCOL(), config->getLPOS(), config->getOFST());
    
    for (int w = 0; w < width; w++) {
		cout << "Rendering: " << (float) w/width << endl;
        for (int h = 0; h < height; h++) {
            /*
            // Ray direction color test
            output(w,h)->Red = abs(rayGenerator->getRayDirection(w,h).x) *255;
            output(w,h)->Green = abs(rayGenerator->getRayDirection(w,h).y) *255;
            output(w,h)->Blue = abs(rayGenerator->getRayDirection(w,h).z) *255;
            */
            glm::vec3 colors = raymarch->getColor(w,h, config->getSTEP(), glm::vec3(x, y, z));
            colors*=255.0;
            if (colors.x > 255) 
                colors.x = 255;
            if (colors.y > 255) 
                colors.y = 255;
            if (colors.z > 255) 
                colors.z = 255;
            output(w,h)->Red =colors.x;
            output(w,h)->Green = colors.y;
            output(w,h)->Blue = colors.z;
        }
    }
    
    output.WriteToFile(config->getFILE());
	cout << "File has been finished rendering." <<endl;
    return 0;
}

void Camera::printImage(char* outputName) {
	BMP output;
	output.SetSize(imgWidth, imgHeight);
	output.SetBitDepth(24);
	glm::vec3 outR;
	for (int i = 0; i < imgWidth; i++) {
		for (int j = 0; j < imgHeight; j++) {
			outR = glm::abs(glm::normalize(getDirectionFromCoordinate(i,j)-eye));
			output(i,j)->Red = outR.x * 255;
			output(i,j)->Green = outR.y * 255;
			output(i,j)->Blue = outR.z * 255;
		}
	}
	output.WriteToFile(outputName);
}