Home
Blogs
Forums
News
Portfolios
Projects
Tutorials
32 users logged in
New? Learn about game development.
Before posting, review our community guidelines.
Follow Us
Chat in the GameDev.net Discord!
Mastodon
Back to Graphics and GPU Programming

Color clamping on ATI

Started by
3 comments, last by Garret 15 years, 9 months ago
Hi, I use glClampColorARB(GL_CLAMP_VERTEX_COLOR_ARB, FALSE); glClampColorARB(GL_CLAMP_FRAGMENT_COLOR_ARB, FALSE); glClampColorARB(GL_CLAMP_READ_COLOR_ARB, GL_FALSE); to avoid color clamping, but this doesn't work on ATI GPUs (program crashes on the corresponding line). Which extensions should I use on ATI video cards? Thanks, Peter
Advertisement
Is this again the same issue as this?
http://www.gamedev.net/community/forums/topic.asp?topic_id=502028
Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);
Actually, the extension is not supported on ATI, so I need an alternative one.
I'm not even sure what that extension is for (GL_ARB_color_buffer_float).
If you want non clamped values, don't use gl_Color in your shader. Just use your own varyings. Also, you are rendering to a floating point target, right?
Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);
Sure, I'm rendering in floating point rendering targets. The problem is that I should transmit values more than 1.0 from app to OpenGL, using glColor call

This topic is closed to new replies.

Advertisement

Popular Topics

Aybe One
How do you manage yourself and your time as years pass on? GDNet Lounge
Jikoob
Too many managers? General and Gameplay Programming
ReignOnU
Do your part to stop global warming and climate change GDNet Lounge
aigan
The promise of freedom in story games Game Design and Theory
robertrobert
Facebook Ads for sales on steam, does it work? Games Business and Law
AliAbdulKareem
Understanding the wavy-like shape in alpha-testing magnification for text rendering Graphics and GPU Programming
Advertisement

Recommended Tutorials

Josh Klint
Object-Oriented Game Design General and Gameplay Programming
Myopic Rhino
SuperQuadric Ellipsoids and Toroids, OpenGL Lighting, and Timing Graphics and GPU Programming
GameDev.net
Join the Games Industry Roundtable and Make Your Mark on the Technology of the Future Event Coverage
_Wizard_
OpenGL API Overhead Graphics and GPU Programming
Myopic Rhino
Code on the Cob Part 14 General and Gameplay Programming

Reticulating splines

About GameDev.net
Community Guidelines
Terms of Service
Privacy Policy
Contact Us
Copyright (c) 1999-2024 GameDev.net, LLC
Back to Top