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eeshow/cro.h, cro.c: add color override

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This commit is contained in:
Werner Almesberger 2016-08-07 08:13:16 -03:00
parent c2c58f6892
commit d953345397
2 changed files with 36 additions and 19 deletions
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53
eeshow/cro.c
View File

@ -53,6 +53,8 @@ struct cro_ctx {
unsigned n_sheets;
const char *output_name;
int color_override; /* FIG color, COLOR_NONE if no override */
};
@ -86,30 +88,32 @@ static inline float pt(struct cro_ctx *cc, int x)
}
static void set_color(cairo_t *cr, int color)
static void set_color(struct cro_ctx *cc, int color)
{
uint32_t c;
if (cc->color_override != COLOR_NONE)
color = cc->color_override;
if (color < 0)
return;
c = color_rgb[color];
cairo_set_source_rgb(cr, (c >> 16) / 255.0, ((c >> 8) & 255) / 255.0,
(c & 255) / 255.0);
cairo_set_source_rgb(cc-> cr,
(c >> 16) / 255.0, ((c >> 8) & 255) / 255.0, (c & 255) / 255.0);
}
static void paint(cairo_t *cr, int color, int fill_color)
static void paint(struct cro_ctx *cc, int color, int fill_color)
{
if (fill_color != COLOR_NONE) {
set_color(cr, fill_color);
set_color(cc, fill_color);
if (color == COLOR_NONE)
cairo_fill(cr);
cairo_fill(cc->cr);
else
cairo_fill_preserve(cr);
cairo_fill_preserve(cc->cr);
}
if (color != COLOR_NONE) {
set_color(cr, color);
cairo_stroke(cr);
set_color(cc, color);
cairo_stroke(cc->cr);
}
}
@ -127,7 +131,7 @@ static void cr_line(void *ctx, int sx, int sy, int ex, int ey,
cairo_move_to(cc->cr, cx(cc, sx), cy(cc, sy));
cairo_line_to(cc->cr, cx(cc, ex), cy(cc, ey));
cairo_set_dash(cc->cr, dashes, ARRAY_ELEMENTS(dashes), 0);
paint(cc->cr, color, COLOR_NONE);
paint(cc, color, COLOR_NONE);
cairo_set_dash(cc->cr, NULL, 0, 0);
}
@ -152,7 +156,7 @@ static void cr_poly(void *ctx,
if (closed)
cairo_close_path(cc->cr);
paint(cc->cr, color, fill_color);
paint(cc, color, fill_color);
}
@ -163,7 +167,7 @@ static void cr_circ(void *ctx, int x, int y, int r,
cairo_new_path(cc->cr);
cairo_arc(cc->cr, cx(cc, x), cy(cc, y), cd(cc, r), 0, 2 * M_PI);
paint(cc->cr, color, fill_color);
paint(cc, color, fill_color);
}
@ -175,7 +179,7 @@ static void cr_arc(void *ctx, int x, int y, int r, int sa, int ea,
cairo_new_path(cc->cr);
cairo_arc(cc->cr, cx(cc, x), cy(cc, y), cd(cc, r),
-ea / 180.0 * M_PI, -sa / 180.0 * M_PI);
paint(cc->cr, color, fill_color);
paint(cc, color, fill_color);
}
@ -192,7 +196,7 @@ static void cr_text(void *ctx, int x, int y, const char *s, unsigned size,
cairo_set_font_size(cc->cr, cd(cc, size) * TEXT_STRETCH);
cairo_text_extents(cc->cr, s, &ext);
set_color(cc->cr, color);
set_color(cc, color);
cairo_move_to(cc->cr, cx(cc, x), cy(cc, y));
@ -228,7 +232,16 @@ static unsigned cr_text_width(void *ctx, const char *s, unsigned size)
}
/* ----- Initializatio and termination ------------------------------------- */
/* ----- Color override ---------------------------------------------------- */
void cro_color_override(struct cro_ctx *cc, int color)
{
cc->color_override = color;
}
/* ----- Initialization and termination ------------------------------------ */
static const struct gfx_ops real_cro_ops = {
@ -254,6 +267,8 @@ static struct cro_ctx *init_common(int argc, char *const *argv)
cc->sheets = NULL;
cc->n_sheets = 0;
cc->color_override = COLOR_NONE;
cc->output_name = NULL;
while ((c = getopt(argc, argv, "o:s:")) != EOF)
switch (c) {
@ -348,7 +363,7 @@ static void cr_png_end(void *ctx)
cc->s = cairo_image_surface_create(CAIRO_FORMAT_RGB24, w, h);
cc->cr = cairo_create(cc->s);
set_color(cc->cr, COLOR_WHITE);
set_color(cc, COLOR_WHITE);
cairo_paint(cc->cr);
cairo_select_font_face(cc->cr, "Helvetica", CAIRO_FONT_SLANT_NORMAL,
@ -400,7 +415,7 @@ static void cr_pdf_end(void *ctx)
cairo_set_line_cap(cc->cr, CAIRO_LINE_CAP_SQUARE);
for (i = 0; i != cc->n_sheets; i++) {
set_color(cc->cr, COLOR_WHITE);
set_color(cc, COLOR_WHITE);
cairo_paint(cc->cr);
record_replay(cc->sheets + i);
@ -432,7 +447,7 @@ uint32_t *cro_img_end(struct cro_ctx *cc, int *w, int *h, int *stride)
CAIRO_FORMAT_RGB24, *w, *h, *stride);
cc->cr = cairo_create(cc->s);
set_color(cc->cr, COLOR_WHITE);
set_color(cc, COLOR_WHITE);
cairo_paint(cc->cr);
cairo_select_font_face(cc->cr, "Helvetica", CAIRO_FONT_SLANT_NORMAL,
@ -468,7 +483,7 @@ void cro_canvas_end(struct cro_ctx *cc, int *w, int *h, int *xmin, int *ymin)
void cro_canvas_draw(struct cro_ctx *cc, cairo_t *cr, int xo, int yo,
float scale)
{
set_color(cr, COLOR_WHITE);
set_color(cc, COLOR_WHITE);
cairo_paint(cr);
cairo_select_font_face(cr, "Helvetica", CAIRO_FONT_SLANT_NORMAL,

2
eeshow/cro.h
View File

@ -31,6 +31,8 @@ extern const struct gfx_ops cro_pdf_ops;
#define cro_canvas_ops cro_png_ops /* just don't call cro_canvas_ops.end */
void cro_color_override(struct cro_ctx *cc, int color);
uint32_t *cro_img_end(struct cro_ctx *cc, int *w, int *h, int *stride);
void cro_img_write(struct cro_ctx *cc, const char *name);