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[Octave-bug-tracker] [bug #54680] imagesc incomplete when using software

From: Pantxo Diribarne
Subject: [Octave-bug-tracker] [bug #54680] imagesc incomplete when using software rendering
Date: Thu, 28 Feb 2019 03:59:31 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:65.0) Gecko/20100101 Firefox/65.0

Follow-up Comment #7, bug #54680 (project octave):

In Octave 4.2 on windows, Octave used to rely on the native opengl
implementation which may have higher GL_MAX_TEXTURE_SIZE, but only implements
opengl 1.1 (which is clearly too old).

As for pcolor, it uses a surface object as you pointed out, and the rendering
is thus very different: a quad primitive per pixel. This is much more
expensive than simple pixel data and we cannot afford to use this approach for
image objects. But we would indeed fallback to this approach when
GL_MAX_TEXTURE_SIZE is exceeded. 


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