Hello, We are using an MiniPC with the following configuration:
- Intel SandyBridge PC Mainboard DH61AG and integrated Intel HD Graphics 3000 - Dual OS: Windows 7 32bit and Ubuntu 12.04 32bit When using OpenGL sampler objects for configuring textures, on Ubuntu I have to create a mipmap chain by calling "glGenerateMipmap()". Otherwise the texture sampling will not work (e.g. returns black). Take the following example: // Init int texture; glGenTextures(1, &texture); glBindTexture(GL_TEXTURE_2D, texture); glTexImage2D(...); int sampler; glGenSamplers(1, &sampler); glSamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glSamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // Render loop glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture); glBindSampler(0, sampler); ... This works perfectly on Windows but not on Ubuntu. For Ubuntu Linux I have to add the following: //Init ... glTexImage2D(...); glGenerateMipmap(GL_TEXTURE_2D); Without the mipmap the texture sampling does not work, although I am not using any mipmaps. When using the traditional texture filter configuration, this problem does not occur and the code behaves the same on Windows and Linux: // Render loop glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, texture); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); Seems to be a driver bug for me. Or did I oversee something ? Thanks and best regards Mark Best regards, Mark Newiger | Senior Software Engineer SeeFront GmbH Esplanade 41 | D-20354 Hamburg, Germany Office: +49 40 416 22 64-83 mark.newi...@seefront.com<mailto:mark.newi...@seefront.com> | www.seefront.com<http://www.seefront.com> Managing Director: Christoph Grossmann Registered seat of the company: Hamburg Register Court: Amtsgericht Hamburg HRB 98205 VAT-ID-No. DE248406189
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