///////////////////////////////////////////////////////////////////////////////
// load a BMP as texture
///////////////////////////////////////////////////////////////////////////////
unsigned int ModelGL::loadTextureBmp(const char* fileName)
{
int chans, x, y;
void* buf;
Image::Bmp bmp;
bmp.read(fileName);
x = bmp.getWidth();
y = bmp.getHeight();
chans = bmp.getBitCount() / 8;
buf = (void*)bmp.getDataRGB();
// gen texture ID
GLuint texture;
glGenTextures(1, &texture);
// set active texture and configure it
glBindTexture(GL_TEXTURE_2D, texture);
// select modulate to mix texture with color for shading
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// if wrap is true, the texture wraps over at the edges (repeat)
// ... false, the texture ends at the edges (clamp)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
//glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
//glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// build our texture mipmaps
switch(chans)
{
case 1:
gluBuild2DMipmaps(GL_TEXTURE_2D, chans, x, y, GL_LUMINANCE, GL_UNSIGNED_BYTE, buf);
break;
case 3:
gluBuild2DMipmaps(GL_TEXTURE_2D, chans, x, y, GL_RGB, GL_UNSIGNED_BYTE, buf);
break;
case 4:
gluBuild2DMipmaps(GL_TEXTURE_2D, chans, x, y, GL_RGBA, GL_UNSIGNED_BYTE, buf);
break;
}
return texture;
}
int main(int argc, char **argv){
mode = 1;
cout << "Enter image name : "; cin >> fileName;
cout << "===================MODE==================\n";
cout << "(0)shows histogram \n(1)global histogram equalization \n(2)local histogram equalization (window size 3)\n";
cout << "Please enter mode : "; cin >> mode;
if (bmp.read(fileName)){
inBuf = bmp.getData();
imageX = bmp.getWidth();
imageY = bmp.getHeight();
}else{
cout << "==============================\n";
cout << "|- Please check image name -|\n";
cout << "==============================\n";
exit(0);
}
histogram = calculate_histogram(inBuf, imageX, imageY); // hitung histogram
if (mode != 0){
if (mode == 1){
strcpy_s(newFileName, "global_equalization_");
strcat_s(newFileName, fileName);
perform_histogram_equalization(histogram, imageX, imageY); // histrogram equalization
}
else{
strcpy_s(newFileName, "local_equalization_");
strcat_s(newFileName, fileName);
local_histogram_equalization(histogram, imageX, imageY, WINDOW_SIZE);
}
bmp.save(newFileName, imageX, imageY, 1, outBuf); // save new image
equalHistogram = calculate_histogram(outBuf, imageX, imageY); // new histogram
}
histoScale = (float)(imageY - 1) / getMaxHistogram(histogram, HISTOGRAM_SIZE);
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(imageX, imageY);
glutInitWindowPosition(10, 10);
glutCreateWindow("Histogram");
Initialize();
glutDisplayFunc(Draw);
glutMainLoop();
return 0;
}
