IplImage* icvRetrieveFrameCAM_CMU( CvCaptureCAM_CMU* capture )
{
if( capture->image && CMU_theCamera )
{
//capture->image->imageData = (char *) CMU_theCamera[capture->index].GetRawData(0);
CMU_theCamera[capture->index].getRGB((unsigned char*)capture->image->imageData,
capture->image->imageSize);
swapRedBlue( capture->image );
return capture->image;
}
return 0;
}
bool CTargaImage::load(char *filename) {
FILE *pFile = fopen(filename, "rb");
if (!pFile)
return false;
tgaheader_t tgaHeader;
// read the TGA header
fread(&tgaHeader, 1, sizeof(tgaheader_t), pFile);
// see if the image type is one that we support (RGB, RGB RLE, GRAYSCALE, GRAYSCALE RLE)
if (((tgaHeader.imageTypeCode != TGA_RGB)
&& (tgaHeader.imageTypeCode != TGA_GRAYSCALE)
&& (tgaHeader.imageTypeCode != TGA_RGB_RLE)
&& (tgaHeader.imageTypeCode != TGA_GRAYSCALE_RLE))
|| tgaHeader.colorMapType != 0) {
fclose(pFile);
return false;
}
// get image width and height
m_width = tgaHeader.width;
m_height = tgaHeader.height;
// colormode -> 3 = BGR, 4 = BGRA
int colorMode = tgaHeader.bpp / 8;
// we don't handle less than 24 bit
if (colorMode < 3) {
fclose(pFile);
return false;
}
m_imageSize = m_width * m_height * colorMode;
// allocate memory for TGA image data
m_pImageData = new unsigned char[m_imageSize];
// skip past the id if there is one
if (tgaHeader.idLength > 0)
fseek(pFile, SEEK_CUR, tgaHeader.idLength);
// read image data
if (tgaHeader.imageTypeCode == TGA_RGB
|| tgaHeader.imageTypeCode == TGA_GRAYSCALE) {
fread(m_pImageData, 1, m_imageSize, pFile);
} else {
// this is an RLE compressed image
unsigned char id;
unsigned char length;
rgba_t color = { 0, 0, 0, 0 };
unsigned int i = 0;
while (i < m_imageSize) {
id = fgetc(pFile);
// see if this is run length data
if (id >= 128) // & 0x80)
{
// find the run length
length = (unsigned char) (id - 127);
// next 3 (or 4) bytes are the repeated values
color.b = (unsigned char) fgetc(pFile);
color.g = (unsigned char) fgetc(pFile);
color.r = (unsigned char) fgetc(pFile);
if (colorMode == 4)
color.a = (unsigned char) fgetc(pFile);
// save everything in this run
while (length > 0) {
m_pImageData[i++] = color.b;
m_pImageData[i++] = color.g;
m_pImageData[i++] = color.r;
if (colorMode == 4)
m_pImageData[i++] = color.a;
--length;
}
} else {
// the number of non RLE pixels
length = (unsigned char) (id + 1);
while (length > 0) {
color.b = (unsigned char) fgetc(pFile);
color.g = (unsigned char) fgetc(pFile);
color.r = (unsigned char) fgetc(pFile);
if (colorMode == 4)
color.a = (unsigned char) fgetc(pFile);
m_pImageData[i++] = color.b;
m_pImageData[i++] = color.g;
m_pImageData[i++] = color.r;
if (colorMode == 4)
m_pImageData[i++] = color.a;
--length;
}
}
}
}
fclose(pFile);
switch (tgaHeader.imageTypeCode) {
case TGA_RGB:
case TGA_RGB_RLE:
if (3 == colorMode) {
m_imageDataFormat = IMAGE_RGB;
m_imageDataType = IMAGE_DATA_UNSIGNED_BYTE;
m_colorDepth = 24;
} else {
m_imageDataFormat = IMAGE_RGBA;
m_imageDataType = IMAGE_DATA_UNSIGNED_BYTE;
m_colorDepth = 32;
}
break;
case TGA_GRAYSCALE:
case TGA_GRAYSCALE_RLE:
m_imageDataFormat = IMAGE_LUMINANCE;
m_imageDataType = IMAGE_DATA_UNSIGNED_BYTE;
m_colorDepth = 8;
break;
}
if ((tgaHeader.imageDesc & TOP_LEFT) == TOP_LEFT)
flipVertical();
// swap the red and blue components in the image data
swapRedBlue();
return (m_pImageData != NULL);
}
