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Diffstat (limited to 'src/unit-constants.h')
| -rw-r--r-- | src/unit-constants.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/unit-constants.h b/src/unit-constants.h new file mode 100644 index 000000000..f74207cf7 --- /dev/null +++ b/src/unit-constants.h @@ -0,0 +1,39 @@ +#ifndef INKSCAPE_UNIT_CONSTANTS_H +#define INKSCAPE_UNIT_CONSTANTS_H + +// 72 points per inch divided by the SVG-recommended value of 90 pixels per inch for computer screen +// For now it is constant throughout Inkscape, later we may make it changeable. +// Ideally this should be the only place to change it, but this is not guaranteed (be careful!) +#define DEVICESCALE 0.8 + +#define PT_PER_IN 72.0 +#define PT_PER_PX DEVICESCALE +#define PX_PER_PT (1/DEVICESCALE) +#define PX_PER_IN (PT_PER_IN / PT_PER_PX) +#define M_PER_IN 0.0254 +#define M_PER_PX (M_PER_IN / PX_PER_IN) +#define CM_PER_IN 2.54 +#define MM_PER_IN 25.4 +#define MM_PER_MM 1.0 +#define MM_PER_CM 10.0 +#define MM_PER_M 1000.0 +#define IN_PER_PT (1 / PT_PER_IN) +#define IN_PER_PX (1 / PX_PER_IN) +#define IN_PER_CM (1 / CM_PER_IN) +#define IN_PER_MM (1 / MM_PER_IN) +#define PT_PER_CM (PT_PER_IN / CM_PER_IN) +#define PX_PER_CM (PX_PER_IN / CM_PER_IN) +#define M_PER_PT (M_PER_IN / PT_PER_IN) +#define PT_PER_M (PT_PER_IN / M_PER_IN) +#define PX_PER_M (PX_PER_IN / M_PER_IN) +#define CM_PER_PT (CM_PER_IN / PT_PER_IN) +#define CM_PER_PX (CM_PER_IN / PX_PER_IN) +#define MM_PER_PT (MM_PER_IN / PT_PER_IN) +#define PT_PER_MM (PT_PER_IN / MM_PER_IN) +#define PX_PER_MM (PX_PER_IN / MM_PER_IN) +#define MM_PER_PX (MM_PER_IN / PX_PER_IN) +#define PT_PER_PT 1.0 +#define IN_PER_IN 1.0 +#define PX_PER_PX 1.0 + +#endif /* !INKSCAPE_UNIT_CONSTANTS_H */ |