tfontsrv: scaled pjw - plan9port - [fork] Plan 9 from user space
(HTM) git clone git://src.adamsgaard.dk/plan9port
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---
(DIR) commit 1785490baa3720b70ebf10d2e6da99ffb81db728
(DIR) parent c96d832508cc6a8db1420b93242af08ec08be720
(HTM) Author: Russ Cox <rsc@swtch.com>
Date: Sat, 1 Dec 2012 00:35:06 -0500
fontsrv: scaled pjw
R=rsc
https://codereview.appspot.com/6854130
Diffstat:
M src/cmd/fontsrv/a.h | 2 ++
M src/cmd/fontsrv/mkfile | 5 +++++
M src/cmd/fontsrv/osx.c | 14 +++-----------
A src/cmd/fontsrv/pjw.c | 321 +++++++++++++++++++++++++++++++
A src/cmd/fontsrv/showpjw.c | 38 +++++++++++++++++++++++++++++++
5 files changed, 369 insertions(+), 11 deletions(-)
---
(DIR) diff --git a/src/cmd/fontsrv/a.h b/src/cmd/fontsrv/a.h
t@@ -25,3 +25,5 @@ extern XFont *xfont;
extern int nxfont;
void *emalloc9p(ulong);
extern Memsubfont *defont;
+
+void drawpjw(Memimage*, Fontchar*, int, int, int, int);
(DIR) diff --git a/src/cmd/fontsrv/mkfile b/src/cmd/fontsrv/mkfile
t@@ -8,8 +8,13 @@ HFILES=a.h
OFILES=\
main.$O\
+ pjw.$O\
$WSYSTYPE.$O\
<$PLAN9/src/mkone
osx-cocoa.$O: osx.c
+
+showpjw: showpjw.c
+ 9c showpjw.c
+ 9l -o showpjw showpjw.o
(DIR) diff --git a/src/cmd/fontsrv/osx.c b/src/cmd/fontsrv/osx.c
t@@ -241,18 +241,10 @@ mksubfont(char *name, int lo, int hi, int size, int antialias)
if(g[0] == 0 || !CGFontGetGlyphBBoxes(font, g, n, r)) {
None:
fc->width = 0;
+ fc->left = 0;
if(i == 0) {
- Point p;
- Fontchar *i;
- p = Pt(x, y0);
- // memimagestring(m, p, memwhite, ZP, defont, peterface);
- i = defont->info + 0;
- memdraw(m, Rect(p.x+i->left, p.y+i->top, p.x+i->left+(i[1].x-i[0].x), p.y+i->bottom),
- memwhite, ZP, defont->bits, Pt(i->x, i->top), S);
- p.x += i->width;
- fc->left = i->left;
- fc->width = i->width;
- x = p.x;
+ drawpjw(m, fc, x, (int)(bbox.size.width * size / unit + 0.99999999), y, y - y0);
+ x += fc->width;
}
continue;
}
(DIR) diff --git a/src/cmd/fontsrv/pjw.c b/src/cmd/fontsrv/pjw.c
t@@ -0,0 +1,321 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <memdraw.h>
+#include "a.h"
+
+uchar pjw[] = {
+ 0x63, 0x6f, 0x6d, 0x70, 0x72, 0x65, 0x73, 0x73,
+ 0x65, 0x64, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x20, 0x6b, 0x32, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x20, 0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x20, 0x20, 0x30, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x34, 0x38, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x20, 0x34, 0x38, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x34, 0x38, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x35, 0x34, 0x31, 0x20, 0x80,
+ 0xff, 0x20, 0x00, 0x08, 0x00, 0x82, 0xc0, 0x16,
+ 0x7f, 0x04, 0x06, 0x04, 0x00, 0x83, 0xfc, 0x01,
+ 0x04, 0x06, 0x04, 0x07, 0x04, 0x00, 0x83, 0xf1,
+ 0x00, 0x50, 0x11, 0x04, 0x18, 0x04, 0x00, 0x84,
+ 0xd4, 0x40, 0x48, 0x04, 0x05, 0x00, 0x07, 0x04,
+ 0x00, 0x87, 0xc1, 0x44, 0x11, 0x04, 0x51, 0xbf,
+ 0xff, 0xff, 0x04, 0x00, 0x87, 0x16, 0xfe, 0x81,
+ 0x01, 0x40, 0x5f, 0xff, 0xff, 0x04, 0x00, 0x87,
+ 0x5f, 0xff, 0xe4, 0x00, 0x40, 0x01, 0x1f, 0xff,
+ 0x00, 0x00, 0x88, 0xfd, 0x7f, 0xff, 0xfd, 0x11,
+ 0x11, 0x00, 0x3f, 0xff, 0x00, 0x00, 0x80, 0xe5,
+ 0x00, 0x03, 0x84, 0x50, 0x04, 0x10, 0x42, 0xff,
+ 0x00, 0x00, 0x80, 0x97, 0x00, 0x03, 0x84, 0x51,
+ 0x00, 0x00, 0x07, 0xff, 0x00, 0x00, 0x80, 0x67,
+ 0x00, 0x03, 0x84, 0xc4, 0x40, 0x41, 0x11, 0x3f,
+ 0x00, 0x75, 0x80, 0x4f, 0x00, 0x0b, 0x84, 0xd0,
+ 0x40, 0x00, 0x11, 0x1b, 0x82, 0xff, 0xff, 0xf5,
+ 0x04, 0x40, 0x84, 0xf0, 0x00, 0x00, 0x04, 0x5f,
+ 0x82, 0xff, 0xff, 0xe1, 0x04, 0x40, 0x84, 0xf4,
+ 0x00, 0x00, 0x01, 0x5b, 0x00, 0x1e, 0x80, 0x2f,
+ 0x04, 0x9e, 0x83, 0x00, 0x00, 0x00, 0x17, 0x82,
+ 0xff, 0xff, 0x40, 0x04, 0x96, 0x84, 0xfe, 0x40,
+ 0x00, 0x00, 0x0f, 0x82, 0xff, 0xfd, 0x00, 0x08,
+ 0xa2, 0x00, 0x0b, 0x80, 0x5f, 0x8b, 0xff, 0xf9,
+ 0x00, 0xb5, 0x11, 0x5f, 0xff, 0xa5, 0x64, 0x00,
+ 0x00, 0x1f, 0x85, 0xff, 0xf4, 0x01, 0x0a, 0xf5,
+ 0x42, 0x04, 0x2e, 0x81, 0x00, 0x2b, 0x87, 0xff,
+ 0xf0, 0x01, 0x0f, 0xe4, 0x54, 0xf0, 0x3f, 0x00,
+ 0x23, 0x80, 0x1f, 0x88, 0xff, 0xe0, 0x00, 0x4e,
+ 0x00, 0x04, 0x00, 0x00, 0x14, 0x00, 0x0b, 0x85,
+ 0xff, 0xd0, 0x00, 0x4c, 0x50, 0x44, 0x04, 0x22,
+ 0x81, 0x00, 0x0b, 0x00, 0x0b, 0x82, 0x49, 0xa6,
+ 0x6c, 0x00, 0x76, 0x00, 0x17, 0x00, 0x7d, 0x88,
+ 0x5e, 0xd6, 0xf9, 0xf1, 0x51, 0x11, 0x00, 0x00,
+ 0x3f, 0x88, 0xff, 0xf1, 0x02, 0x2e, 0xff, 0xf3,
+ 0xf4, 0x6a, 0x98, 0x00, 0x0b, 0x8b, 0xff, 0xf3,
+ 0x06, 0x2f, 0xff, 0xeb, 0xf8, 0xba, 0xa5, 0x04,
+ 0x00, 0xbf, 0x8b, 0xff, 0xf5, 0x42, 0x9f, 0xff,
+ 0xcf, 0xf9, 0x2b, 0xa5, 0xc0, 0x08, 0xff, 0x8b,
+ 0xff, 0xfc, 0xc5, 0xfd, 0x40, 0x3f, 0xfe, 0x0b,
+ 0xfb, 0x00, 0x0e, 0xff, 0x00, 0xae, 0x88, 0xfa,
+ 0x96, 0xff, 0xfa, 0x81, 0x54, 0x40, 0x1b, 0xff,
+ 0x00, 0x0b, 0x88, 0xfe, 0xaa, 0x96, 0x50, 0x59,
+ 0x41, 0x00, 0x7b, 0xff, 0x88, 0xff, 0xff, 0x53,
+ 0xff, 0xab, 0xc0, 0x00, 0x16, 0x54, 0x00, 0xba,
+ 0x8b, 0xff, 0xff, 0x43, 0xfe, 0xaf, 0xe8, 0x00,
+ 0x5a, 0x61, 0x41, 0xbf, 0xff, 0x8b, 0xff, 0xff,
+ 0xc2, 0xfe, 0xbf, 0xfd, 0x01, 0x59, 0x94, 0x51,
+ 0x1b, 0xff, 0x00, 0xef, 0x88, 0xfe, 0xeb, 0xed,
+ 0x95, 0x56, 0x51, 0x40, 0x0f, 0xff, 0x8b, 0xff,
+ 0xff, 0xe0, 0xfa, 0x92, 0xa6, 0x91, 0x11, 0x54,
+ 0x54, 0x0f, 0xff, 0x00, 0x0b, 0x84, 0xff, 0xa9,
+ 0xa4, 0x00, 0x01, 0x04, 0x17, 0x00, 0x6c, 0x88,
+ 0xba, 0xaf, 0xff, 0xfd, 0x96, 0x45, 0x40, 0x3f,
+ 0xff, 0x00, 0x00, 0x88, 0x2a, 0xbf, 0x6a, 0xa4,
+ 0x15, 0x54, 0x60, 0xbf, 0xff, 0x00, 0x00, 0x88,
+ 0xfa, 0xeb, 0x90, 0x00, 0x95, 0x41, 0xae, 0xff,
+ 0xff, 0x04, 0x0b, 0x84, 0xaa, 0xa5, 0x11, 0x45,
+ 0x05, 0x01, 0x49, 0x05, 0x27, 0x87, 0xae, 0xff,
+ 0xf9, 0x54, 0x11, 0x6e, 0xff, 0xff, 0x0c, 0x0b,
+ 0x85, 0xfa, 0x54, 0x56, 0xbb, 0xff, 0xff, 0x04,
+ 0x0b, 0x87, 0xab, 0xbf, 0xf6, 0x54, 0x43, 0xaf,
+ 0xff, 0xff, 0x04, 0x00, 0x87, 0x5a, 0xaa, 0x95,
+ 0x11, 0x46, 0xfb, 0xff, 0xff, 0x04, 0x00, 0x84,
+ 0xaa, 0x55, 0x10, 0x45, 0x07, 0x00, 0x17, 0x04,
+ 0x00, 0x84, 0x95, 0x54, 0x45, 0x14, 0x06, 0x00,
+ 0x5e, 0x04, 0x00, 0x87, 0xa5, 0x55, 0x50, 0x40,
+ 0x12, 0xff, 0xbf, 0xff,
+};
+
+static Memimage* resample(int, int, Memimage*);
+
+void
+drawpjw(Memimage *m, Fontchar *fc, int x, int width, int height, int ascent)
+{
+ int w, p[2];
+ Memimage *pm, *pm1, *pm2;
+ Rectangle r;
+ int margin;
+
+ w = width;
+
+ // assume margin below baseline is
+ // approximately how much room we should preserve at top above peter too
+ margin = height - ascent;
+ if(w > ascent-margin)
+ w = ascent-margin;
+
+ if(w < 9)
+ w = 9;
+ fc->width = w;
+
+ pipe(p);
+ write(p[1], pjw, sizeof pjw);
+ close(p[1]);
+ pm = readmemimage(p[0]);
+ close(p[0]);
+ if(pm == nil)
+ goto Error;
+
+ pm1 = allocmemimage(pm->r, GREY8);
+ memimagedraw(pm1, pm1->r, pm, pm->r.min, nil, ZP, S);
+ pm2 = resample(w, w, pm1);
+ memimagedraw(m, Rect(x, ascent-w, x+w, ascent), memwhite, ZP, nil, ZP, SoverD);
+ memimagedraw(m, Rect(x, ascent-w, x+w, ascent), memblack, ZP, pm2, pm2->r.min, SoverD);
+ freememimage(pm2);
+ freememimage(pm1);
+ freememimage(pm);
+ return;
+
+Error:
+ // draw a box
+ r = Rect(x, 0, x+width, height);
+ memimagedraw(m, r, memwhite, ZP, nil, ZP, S);
+ memimagedraw(m, insetrect(r, 3), memblack, ZP, nil, ZP, S);
+ return;
+}
+
+#define K2 7 /* from -.7 to +.7 inclusive, meaning .2 into each adjacent pixel */
+#define NK (2*K2+1)
+static double K[NK];
+
+static void
+resamplex(uchar *in, int off, int d, int inx, uchar *out, int outx)
+{
+ int i, x, k;
+ double X, xx, v, rat;
+
+
+ rat = (double)inx/(double)outx;
+ for(x=0; x<outx; x++){
+ if(inx == outx){
+ /* don't resample if size unchanged */
+ out[off+x*d] = in[off+x*d];
+ continue;
+ }
+ v = 0.0;
+ X = x*rat;
+ for(k=-K2; k<=K2; k++){
+ xx = X + rat*k/10.;
+ i = xx;
+ if(i < 0)
+ i = 0;
+ if(i >= inx)
+ i = inx-1;
+ v += in[off+i*d] * K[K2+k];
+ }
+ out[off+x*d] = v;
+ }
+}
+
+static void
+resampley(uchar **in, int off, int iny, uchar **out, int outy)
+{
+ int y, i, k;
+ double Y, yy, v, rat;
+
+ rat = (double)iny/(double)outy;
+ for(y=0; y<outy; y++){
+ if(iny == outy){
+ /* don't resample if size unchanged */
+ out[y][off] = in[y][off];
+ continue;
+ }
+ v = 0.0;
+ Y = y*rat;
+ for(k=-K2; k<=K2; k++){
+ yy = Y + rat*k/10.;
+ i = yy;
+ if(i < 0)
+ i = 0;
+ if(i >= iny)
+ i = iny-1;
+ v += in[i][off] * K[K2+k];
+ }
+ out[y][off] = v;
+ }
+
+}
+
+static int
+max(int a, int b)
+{
+ if(a > b)
+ return a;
+ return b;
+}
+
+static double
+fac(int L)
+{
+ int i, f;
+
+ f = 1;
+ for(i=L; i>1; --i)
+ f *= i;
+ return f;
+}
+
+/*
+ * i0(x) is the modified Bessel function, Σ (x/2)^2L / (L!)²
+ * There are faster ways to calculate this, but we precompute
+ * into a table so let's keep it simple.
+ */
+static double
+i0(double x)
+{
+ double v;
+ int L;
+
+ v = 1.0;
+ for(L=1; L<10; L++)
+ v += pow(x/2., 2*L)/pow(fac(L), 2);
+ return v;
+}
+
+static double
+kaiser(double x, double tau, double alpha)
+{
+ if(fabs(x) > tau)
+ return 0.;
+ return i0(alpha*sqrt(1-(x*x/(tau*tau))))/i0(alpha);
+}
+
+
+static Memimage*
+resample(int xsize, int ysize, Memimage *m)
+{
+ int i, j, bpl, nchan;
+ Memimage *new;
+ uchar **oscan, **nscan;
+ double v;
+
+ for(i=-K2; i<=K2; i++){
+ K[K2+i] = kaiser(i/10., K2/10., 4.);
+/* print("%g %g\n", i/10., K[K2+i]); */
+ }
+
+ /* normalize */
+ v = 0.0;
+ for(i=0; i<NK; i++)
+ v += K[i];
+ for(i=0; i<NK; i++)
+ K[i] /= v;
+
+ new = allocmemimage(Rect(0, 0, xsize, ysize), m->chan);
+ if(new == nil)
+ sysfatal("can't allocate new image: %r");
+
+ oscan = malloc(Dy(m->r)*sizeof(uchar*));
+ nscan = malloc(max(ysize, Dy(m->r))*sizeof(uchar*));
+ if(oscan == nil || nscan == nil)
+ sysfatal("can't allocate: %r");
+
+ /* unload original image into scan lines */
+ bpl = bytesperline(m->r, m->depth);
+ for(i=0; i<Dy(m->r); i++){
+ oscan[i] = malloc(bpl);
+ if(oscan[i] == nil)
+ sysfatal("can't allocate: %r");
+ j = unloadmemimage(m, Rect(m->r.min.x, m->r.min.y+i, m->r.max.x, m->r.min.y+i+1), oscan[i], bpl);
+ if(j != bpl)
+ sysfatal("unloadmemimage");
+ }
+
+ /* allocate scan lines for destination. we do y first, so need at least Dy(m->r) lines */
+ bpl = bytesperline(Rect(0, 0, xsize, Dy(m->r)), m->depth);
+ for(i=0; i<max(ysize, Dy(m->r)); i++){
+ nscan[i] = malloc(bpl);
+ if(nscan[i] == nil)
+ sysfatal("can't allocate: %r");
+ }
+
+ /* resample in X */
+ nchan = m->depth/8;
+ for(i=0; i<Dy(m->r); i++){
+ for(j=0; j<nchan; j++){
+ if(j==0 && m->chan==XRGB32)
+ continue;
+ resamplex(oscan[i], j, nchan, Dx(m->r), nscan[i], xsize);
+ }
+ free(oscan[i]);
+ oscan[i] = nscan[i];
+ nscan[i] = malloc(bpl);
+ if(nscan[i] == nil)
+ sysfatal("can't allocate: %r");
+ }
+
+ /* resample in Y */
+ for(i=0; i<xsize; i++)
+ for(j=0; j<nchan; j++)
+ resampley(oscan, nchan*i+j, Dy(m->r), nscan, ysize);
+
+ /* pack data into destination */
+ bpl = bytesperline(new->r, m->depth);
+ for(i=0; i<ysize; i++){
+ j = loadmemimage(new, Rect(0, i, xsize, i+1), nscan[i], bpl);
+ if(j != bpl)
+ sysfatal("loadmemimage: %r");
+ }
+ return new;
+}
(DIR) diff --git a/src/cmd/fontsrv/showpjw.c b/src/cmd/fontsrv/showpjw.c
t@@ -0,0 +1,38 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+
+void eresized(int);
+
+void
+main(void)
+{
+ initdraw(nil, nil, nil);
+
+ einit(Emouse);
+ eresized(0);
+ for(;;)
+ emouse();
+}
+
+void
+eresized(int new)
+{
+ Point p;
+ int i;
+ char buf[100];
+
+ if(new && getwindow(display, Refnone) < 0)
+ sysfatal("getwindow: %r");
+
+ p = addpt(screen->r.min, Pt(10, 10));
+ draw(screen, screen->r, display->white, nil, ZP);
+ for(i=10; i<=50; i+=i/10) {
+ sprint(buf, "/mnt/font/LucidaGrande/%da/font", i);
+ font = openfont(display, buf);
+ string(screen, p, display->black, ZP, font, "Unknown char: \xe1\x88\xb4");
+ p.y += stringsize(font, "Unknown char: \xe1\x88\xb4").y;
+ }
+ flushimage(display, 1);
+}