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https://bugs.freedesktop.org/show_bug.cgi?id=8410
------- Additional Comments From [EMAIL PROTECTED] 2006-09-24 11:15 -------
<history-lesson>
Roland commented: "...there is some problem when using both glColor3x and
glColor4x within the same glBegin/glEnd pair (which doomsdays does). Btw
doomsday shouldn't do this, I think it's a mistake by the opengl api to even
allow things like that..."
The reason the API allows that sort of thing is to minimize the amount of data
transferred from CPU to GPU (memory cycles are slow compared to either CPU or
GPU compute cycles) and to maximize concurrent processing by the CPU and GPU
(CPU decides what data to send; GPU handles conversion, reformatting, and
inserting default values).
All this made more sense before hardware was designed for D3D, which makes
different assumptions about batching and data formats on the host than the
original OpenGL spec.
</history-lesson>
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