png image blurry when loaded onto texture
- by Chris
I have created a png image in photoshop with transparencies that I have loaded into and OpenGL program. I have binded it to a texture and in the program the picture looks blurry and I'm not sure why.
Loading Code
// Texture loading object
nv::Image title;
// Return true on success
if(title.loadImageFromFile("test.png"))
{
glGenTextures(1, &titleTex);
glBindTexture(GL_TEXTURE_2D, titleTex);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
glTexImage2D(GL_TEXTURE_2D, 0, title.getInternalFormat(), title.getWidth(), title.getHeight(), 0, title.getFormat(), title.getType(), title.getLevel(0));
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, 16.0f);
}
else
MessageBox(NULL, "Failed to load texture", "End of the world", MB_OK | MB_ICONINFORMATION);
Display Code
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBindTexture(GL_TEXTURE_2D, titleTex);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTranslatef(-800, 0, 0.0);
glColor3f(1,1,1);
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0); glVertex2f(0,0);
glTexCoord2f(0.0, 1.0); glVertex2f(0,600);
glTexCoord2f(1.0, 1.0); glVertex2f(1600,600);
glTexCoord2f(1.0, 0.0); glVertex2f(1600,0);
glEnd();
glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
