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sch2fig/: add Cairo PDF driver

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This commit is contained in:
Werner Almesberger 2016-08-01 00:37:32 -03:00
parent 4ef07e5e29
commit 93537be396
3 changed files with 91 additions and 14 deletions
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97
sch2fig/cairo.c
View File

@ -18,6 +18,7 @@
#include <math.h>
#include <cairo/cairo.h>
#include <cairo/cairo-pdf.h>
#include "util.h"
#include "style.h"
@ -220,7 +221,7 @@ static const struct gfx_ops real_cairo_ops = {
};
static void *cr_init(int argc, char *const *argv)
static struct cairo_ctx *init_common(int argc, char *const *argv)
{
struct cairo_ctx *cc;
char c;
@ -244,6 +245,16 @@ static void *cr_init(int argc, char *const *argv)
layer_init(&cc->layer, &real_cairo_ops, cc);
return cc;
}
static void *cr_png_init(int argc, char *const *argv)
{
struct cairo_ctx *cc;
cc = init_common(argc, argv);
/* cr_text_width needs *something* to work with */
cc->s = cairo_image_surface_create(CAIRO_FORMAT_RGB24, 16, 16);
@ -253,22 +264,45 @@ static void *cr_init(int argc, char *const *argv)
}
static void cr_end(void *ctx)
static void *cr_pdf_init(int argc, char *const *argv)
{
struct cairo_ctx *cc = ctx;
int x, y, w, h;
struct cairo_ctx *cc;
cc = init_common(argc, argv);
/* cr_text_width needs *something* to work with */
cc->s = cairo_pdf_surface_create(NULL, 16, 16);
cc->cr = cairo_create(cc->s);
return cc;
}
static void end_common(struct cairo_ctx *cc, int *w, int *h)
{
int x, y;
cairo_surface_destroy(cc->s);
cairo_destroy(cc->cr);
layer_bbox(&cc->layer, &x, &y, &w, &h);
layer_bbox(&cc->layer, &x, &y, w, h);
// fprintf(stderr, "%dx%d%+d%+d\n", w, h, x, y);
// fprintf(stderr, "%dx%d%+d%+d\n", *w, *h, x, y);
cc->xo = -cd(cc, x);
cc->yo = -cd(cc, y);
w = cd(cc, w);
h = cd(cc, h);
// fprintf(stderr, "%dx%d%+d%+d\n", w, h, x, y);
*w = cd(cc, *w);
*h = cd(cc, *h);
// fprintf(stderr, "%dx%d%+d%+d\n", *w, *h, x, y);
}
static void cr_png_end(void *ctx)
{
struct cairo_ctx *cc = ctx;
int w, h;
end_common(cc, &w, &h);
cc->s = cairo_image_surface_create(CAIRO_FORMAT_RGB24, w, h);
cc->cr = cairo_create(cc->s);
@ -288,10 +322,37 @@ static void cr_end(void *ctx)
}
static void cr_pdf_end(void *ctx)
{
struct cairo_ctx *cc = ctx;
int w, h;
end_common(cc, &w, &h);
cc->s = cairo_pdf_surface_create(cc->output_name, w, h);
cc->cr = cairo_create(cc->s);
set_color(cc->cr, COLOR_WHITE);
cairo_paint(cc->cr);
cairo_select_font_face(cc->cr, "Helvetica", CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_BOLD);
cairo_set_line_width(cc->cr, 3);
layer_replay(&cc->layer);
layer_destroy(&cc->layer);
cairo_show_page(cc->cr);
cairo_surface_destroy(cc->s);
cairo_destroy(cc->cr);
}
/* ----- Operations -------------------------------------------------------- */
const struct gfx_ops cairo_ops = {
const struct gfx_ops cairo_png_ops = {
.name = "png",
// .line = cr_line, @@@ later
.poly = layer_poly,
@ -299,6 +360,18 @@ const struct gfx_ops cairo_ops = {
.arc = layer_arc,
.text = layer_text,
.text_width = cr_text_width,
.init = cr_init,
.end = cr_end,
.init = cr_png_init,
.end = cr_png_end,
};
const struct gfx_ops cairo_pdf_ops = {
.name = "pdf",
// .line = cr_line, @@@ later
.poly = layer_poly,
.circ = layer_circ,
.arc = layer_arc,
.text = layer_text,
.text_width = cr_text_width,
.init = cr_pdf_init,
.end = cr_pdf_end,
};

3
sch2fig/cairo.h
View File

@ -17,6 +17,7 @@
#include "gfx.h"
extern const struct gfx_ops cairo_ops;
extern const struct gfx_ops cairo_png_ops;
extern const struct gfx_ops cairo_pdf_ops;
#endif /* !CAIRO_H */

5
sch2fig/main.c
View File

@ -29,7 +29,8 @@
static struct gfx_ops const *ops_list[] = {
&fig_ops,
&cairo_ops,
&cairo_png_ops,
&cairo_pdf_ops,
};
@ -47,6 +48,8 @@ void usage(const char *name)
" fig [-t template.fig] [var=value ...]\n"
" Cairo PNG driver spec:\n"
" png [-o output.png] [-s scale]\n"
" Cairo PDF driver spec:\n"
" pdf [-o output.pdf] [-s scale]\n"
, name);
exit(1);
}