When creating a QR-Tag in TEX-Format without a border, the resulting image has nonetheless a border left and border right of the QR-Code. Though these borders are transparent, they disturb the proper placement within a tikzpicture-environment (e. g. anchor=north west).
The root cause of this issue is the command '\pgfpathlineto', which indeed draws a black line from X0/Y on the left to X1/Y on the right. But, and this is the problem, '\pgfpathlineto' also adds a transparent cap to the left of the beginning and a transparent cap to the right of the end of the line. The caps have a width of half the path line width. The resulting image dimensions have the width too large for one module. I propose to draw filled rectangles instead of paths.
When creating a QR-Tag in TEX-Format without a border, the resulting image has nonetheless a border left and border right of the QR-Code. Though these borders are transparent, they disturb the proper placement within a tikzpicture-environment (e. g. anchor=north west). The root cause of this issue is the command '\pgfpathlineto', which indeed draws a black line from X0/Y on the left to X1/Y on the right. But, and this is the problem, '\pgfpathlineto' also adds a transparent cap to the left of the beginning and a transparent cap to the right of the end of the line. The caps have a width of half the path line width. The resulting image dimensions have the width too large for one module. I propose to draw filled rectangles instead of paths.
with best regards