[Webkit-unassigned] [Bug 219204] Incorrect values of disabled (const) attribute when drawing with drawArraysInstanced

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=219204

--- Comment #1 from Marcin <msokalski at novomatic-tech.com> ---
More complete attributes description:

#0 size = 4, type UBYTE, stride = 6, offset = 0 (contains x1,y1,x2,y2 coordinates of rectangle)
#2 size = 2, type UBYTE, strand = 6, offset = 4 (contains texture coordinates of lower-left corner)

shader reconstructs vertex coordinates by testing gl_VertexID

actual draw call:

gl.drawArraysInstanced(gl.TRIANGLE_STRIP, 0, 4, number_of_rectangles_in_vbo);

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