scalable font solution?

use cubic splines.

quote:

---

I tried to use 1024x1024 texture fonts and then scale it, however when i make it smaller (undr 1.0 in normal scale) it gets really, really fuzzy, I tried to solve the problem by using no mipmaps but it gets even worse.

---

What minification filtering mode were you using? You should be using trilinear or anisotropic filtering.

quote:

---

Original post by 666_1337
use cubic splines.

---

Nobody really uses cubic splines for screen fonts. They''re always converted to bitmap fonts prior to rendering.

How exactly do you enable trilinear / anisotropic filtering? Are they driver options?

The texture looks just fine, the result is just smudgy.

glTexParameter

Trilinear is the GL_LINEAR_MIPMAP_LINEAR mode for minification. You need to be using mipmaps to use it. Anisotropic filtering can be enabled via extensions or in your graphics card settings.

Damn, I have done everything mentioned so far.

The scaled down 1024x1024 font looks like it had anti-aliasing although it doesn''t and shouldn''t (i prefer my text sharp) the smaller 256x256 font just looks better, however scaling it is impossible.

glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);

gluBuild2DMipmaps(GL_TEXTURE_2D, 3, pBitmap[0]->w,
pBitmap[0]->h,
GL_RGB,
GL_UNSIGNED_BYTE,
pixels);


This is what I use to build the font.

The small font is simply sharp and good looking, the way I wish the big font would look. However it is kind of antialiased, which I don''t want.

try this one:

glTexParameterf(GL_TEXTURE_2D, TEXTURE_MAX_ANISOTROPY_EXT, 8.0f);

quote:

---

Original post by benjamin bunny
Nobody really uses cubic splines for screen fonts. They''re always converted to bitmap fonts prior to rendering.

---

I meant he shall store the splines and convert them into rastergraphics during his programm loads. it''s always better storing ... say 1000 controll points than 10 different-sized bitmaps to have 10 different font sizes.

quote:

---

Original post by 666_1337
try this one:

glTexParameterf(GL_TEXTURE_2D, TEXTURE_MAX_ANISOTROPY_EXT, 8.0f);

quote:

---

Original post by benjamin bunny
Nobody really uses cubic splines for screen fonts. They're always converted to bitmap fonts prior to rendering.

---

I meant he shall store the splines and convert them into rastergraphics during his programm loads. it's always better storing ... say 1000 controll points than 10 different-sized bitmaps to have 10 different font sizes.

---

That spline technique seems too complicated for my purposes.
That MAX_ANISOTROPY_EXT works decently. it is still little fudgy(anti-aliased), but it removed most of the irregularities.

How widely supported is this ext?

[edited by - captian goatse on April 24, 2004 8:40:13 AM]

should be on most cards, however its best to check it exists AND its best to test for the max aniotropy level, as i''mnot sure what would happen if you request a level the card cant do (also the higher the level the more work the card has to do)

quote:

---

Original post by _the_phantom_
should be on most cards, however its best to check it exists AND its best to test for the max aniotropy level, as i''mnot sure what would happen if you request a level the card cant do (also the higher the level the more work the card has to do)

---

it will activate the highest posible level of anisotrophy. at least my geforce fx does that, if i set it to a value too high.