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Shuffle scaling around so we always work on 100×100 pixels.

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Width variations are not catered for by scaling on output.
This commit is contained in:
Ben Harris 2017-08-01 18:11:51 +01:00
parent 530a41fab6
commit 7a06191a8f
1 changed files with 11 additions and 9 deletions
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bedstead.c
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@ -175,14 +175,16 @@ static int const nwidths = sizeof(widths) / sizeof(widths[0]);
struct width const *width = &widths[0];
/* Size of pixels in font design units (usually 1000/em) */
/* Size of output pixels in font design units (usually 1000/em) */
#define XPIX (width->xpix)
#define YPIX 100
/* We work internally in smaller units, though. */
#define SCALE 2
#define XPIX_S (XPIX * SCALE)
#define YPIX_S (YPIX * SCALE)
/* Internally, we work in pixels 100 design units square */
#define XPIX_S 100
#define YPIX_S 100
#define XSCALE ((double)XPIX_S / (double)XPIX)
#define YSCALE ((double)YPIX_S / (double)YPIX)
/* Position of diagonal lines within pixels */
#define XQTR_S (XPIX_S/4)
@ -1831,8 +1833,8 @@ emit_path()
started = 1;
do {
printf(" %g %g %s 1\n",
(double)p->v.x / SCALE,
(double)p->v.y / SCALE - 3*YPIX,
(double)p->v.x / XSCALE,
(double)p->v.y / YSCALE - 3*YPIX,
p == &points[i] && p->next ? "m" : "l");
p1 = p->next;
p->prev = p->next = NULL;
@ -1850,9 +1852,9 @@ emit_path()
* waveform of the SAA5050. This is implemented by moving all left
* edges left and right. The code below only handles cases where we
* don't run out of slack in horizontal lines, which limits weight to
* the range (-50 * SCALE) < weight < (25 * SCALE).
* the range (-0.5 * XPIX) < weight < (0.25 * XPIX).
*/
static int weight = 0 * SCALE;
static int weight = 0;
static void
adjust_weight()