Thread: OpenGL sprite help

I'm making a sprite system for opengl; I can load the bitmaps (plural bitmaps, because there's an alpha mask) ok. I can make the quad ok. Then I render it. What is not ok is what happens when I try to draw other things on the screen. Even with an "alpha" component of 255 (completly on) weird things happen. For example, when I display a brown 16x16 quad after drawing a white rectangle, the white quad turns brown too. Here's the important parts of my code (tell me if there's something else I should include as important):

This is in my initalization code:

Code:

 glOrtho(0,W-1,H-1,0,1,-1);
 glEnable(GL_BLEND);
 glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 glEnable(GL_TEXTURE_2D);

W and H are the width and heigth of the screen, respectivly.

This is how I create the texture:

Code:

 /*Make the texture*/
 glGenTextures(1,&(f->tex));
 glBindTexture(GL_TEXTURE_2D,f->tex);
 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
 glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
 glTexImage2D(GL_TEXTURE_2D,0,GL_RGBA,w,h,0,GL_RGBA,GL_UNSIGNED_BYTE,final_bmp);

w and h are the width and heigth of the texture, final_bmp is a pointer to the color+alpha chanel. f->tex is the tex id thingy.

Finally, I draw the texture like this:

Code:

 glBindTexture(GL_TEXTURE_2D,f->tex);
 glBegin(GL_QUADS);
 glTexCoord2f(0,0);
 glVertex2i(x,y+f->h);
 glTexCoord2f(1,0);
 glVertex2i(x+f->w,y+f->h);
 glTexCoord2f(1,1);
 glVertex2i(x+f->w,y);
 glTexCoord2f(0,1);
 glVertex2i(x,y);
 glEnd();

x and y are the positions on the screen; they are representative of the upper left corner of the texture. f->h and f->w are the heigth and width of the texture, respectivly.

Please help me. I'm really lost right now.

I should have shown the code that draws the white box. Here it is:

Code:

 glBegin(GL_QUADS);
 glColor3ub(255,255,255);
 glVertex2i(x1,y1);
 glVertex2i(x1,y2);
 glVertex2i(x2,y2);
 glVertex2i(x2,y1);
 glEnd();

That works! I'm one huge step closer to porting HIVE to opengl. Thank you.