Anyone know of an easy way to resize an Image in c++ and win32? The image will be a 24bit .tga. If it matters Ill be using opengl Thanks

There's also GDI+, which comes with Windows XP and later, and is available as a redistributable for Win98 and later. It's not hard to resize an image with the Bitmap class. There's an example of scaling in the API documentation.

On the other hand, if you're using OpenGL, then usually you don't need to scale images independently.

Quote:Original post by hahaha
Anyone know of an easy way to resize an Image in c++ and win32? The image will be a 24bit .tga. If it matters Ill be using opengl

Thanks

Do you want to resize the image on the fly ?
If so you can use OpenGl for it.
Load you tga file as an OpenGL texture.
Setup a quad of your desired image dimension and bind your loaded texture.


your code should look like this.


glBindTexture(GL_TEXTURE_2D, tex);
glBegin(GL_TRIANGLE_STRIP);


glTexCoord2f(0,0); //Left upper corner of your texture
glVertex2f (x, y); //x and y are the begining coords of your quad

glTexCoord2f(1,0); //Right upper corner of your texture
glVertex2f (x + w, y); //w is the width of your texture

glTexCoord2f(0,1); //Left down corner of your texture
glVertex2f (x , y + h); //h is the Highth of your texture

glTexCoord2f(1,1); //Right down corner of your texture
glVertex2f (x+w , y + h);


glEnd ();