Hi Nowhere,
Thanks for the response. Attached are grabs of what’s drawn for a texture size 512x512 and then scaled to 480x480. Below is the part of the code that loads the image:
Sam
struct BitMapFile
{
int sizeX;
int sizeY;
unsigned char *data;
};
// Routine to read a bitmap file.
// Works only for uncompressed bmp files of 24-bit color.
BitMapFile *getBMPData(string filename)
{
BitMapFile *bmp = new BitMapFile;
unsigned int size, offset, headerSize;
// Read input file name.
ifstream infile(filename.c_str(), ios::binary);
// Get the starting point of the image data.
infile.seekg(10);
infile.read((char *) &offset, 4);
// Get the header size of the bitmap.
infile.read((char *) &headerSize,4);
// Get width and height values in the bitmap header.
infile.seekg(18);
infile.read( (char *) &bmp->sizeX, 4);
infile.read( (char *) &bmp->sizeY, 4);
// Allocate buffer for the image.
size = bmp->sizeX * bmp->sizeY * 24;
bmp->data = new unsigned char[size];
// Read bitmap data.
infile.seekg(offset);
infile.read((char *) bmp->data , size);
// Reverse color from bgr to rgb.
int temp;
for (int i = 0; i < size; i += 3)
{
temp = bmp->data[i];
bmp->data[i] = bmp->data[i+2];
bmp->data[i+2] = temp;
}
return bmp;
}
BitMapFile *image[1];
// Load the texture.
image[0] = getBMPData("…/Textures/launch.bmp");
…
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, image[0]->sizeX, image[0]->sizeY, 0,
GL_RGB, GL_UNSIGNED_BYTE, image[0]->data);