Saving A Picture?

[Vlatko]

What are some of the possible ways to save a picture to a file using VC++.

[parksie]

The easiest file type to use is Targa...I don't have any code for writing it, but I'm sure you can work it out from this reader code:

bool mvcTexture::LoadFromTGA(char* pcFilename, uint nTexMode) {
	// Targa data type -- uncompressed, RGBA image; element
	// 3 is always 2.
	GLubyte    targaMagic[12] = { 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

	GLubyte    fileMagic[12];

	// Header data.
	GLubyte    header[6];
	GLuint     bytesPerPixel;

	GLuint     imageSize;
	GLuint     tmp;
	GLint      i;
	long lComponents;

	FILE *file = NULL;
	file = fopen(pcFilename, "rb");

	// Start reading in the header, make sure we
	// have the right Targa data type.  

	if(file == NULL || fread(fileMagic, 1, sizeof(fileMagic), file) != sizeof(fileMagic) || memcmp(targaMagic, fileMagic, sizeof(targaMagic)) != 0 || fread(header, 1, sizeof(header), file) != sizeof(header)) {
		fclose(file);
		return false;
    }

	// Determine width and height from header data.

	m_nWidth  = header[1] * 256 + header[0];
	m_nHeight = header[3] * 256 + header[2];

	// Determine color bit depth of the image (24 or 32).

	if(m_nWidth <= 0 || m_nHeight <= 0 || (header[4] != 24 && header[4] != 32)) {
		fclose(file);
		return false;
	}

	m_nBPP = header[4];
	bytesPerPixel = m_nBPP / 8;
	imageSize     = m_nWidth * m_nHeight * bytesPerPixel;

	m_pucImageData = (GLubyte *)malloc(imageSize);

	if(m_pucImageData == NULL || fread(m_pucImageData, 1, imageSize, file) != imageSize) {
		if(m_pucImageData != NULL) {
			free(m_pucImageData);
		}

		fclose(file);
		return false;
	} 

	for(i = 0; i < imageSize; i += bytesPerPixel) {
		tmp = m_pucImageData[i];
		m_pucImageData[i] = m_pucImageData[i + 2];
		m_pucImageData[i + 2] = tmp;
	}

	fclose (file);

It needs a little tidying up to change to use new instead of malloc, but that shouldn't be too hard.

PS: Targa files are stored as BGR, not RGB...