https://bugs.freedesktop.org/show_bug.cgi?id=96853
Bug ID: 96853
Summary: gl_PrimitiveID is zero when rendering points of size >
1
Product: Mesa
Version: git
Hardware: Other
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Mesa core
Assignee: mesa-dev@lists.freedesktop.org
Reporter: denis.fisse...@tu-dortmund.de
QA Contact: mesa-dev@lists.freedesktop.org
Using Mesa3d 12.1.0-devel with Ubuntu 16.04 LTS in VMware, I stumbled upon a
bug regarding the contents of gl_PrimitiveID in the fragment shader.
I am using gl_PrimitiveID for color generation. When rendering a VAO as
GL_POINTS and the point size set by glPointSize() is larger than 1,
gl_PrimitiveID constantly had a value of 0. As soon as the point size is
reduced to 1 or the type on primitive is changed to GL_TRIANGLES,
gl_PrimitiveID contains correct values. For rasterized points, the value of
gl_PrimitiveID in the fragment shader should equal the value of a
variable(declared using "flat") set to gl_VertexID in the vertex shader. Using
this workaround i was able to produce the desired values.
--
You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact for the bug._______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
