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Add support for transform, color none, and some colours in style attribute.

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svn path=/trunk/netsurf/; revision=3654
This commit is contained in:
James Bursa 2007-11-29 05:56:57 +00:00
parent f386520ff2
commit 069525fe89
1 changed files with 109 additions and 13 deletions
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122
image/svg.c
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@ -20,6 +20,7 @@
* Content for image/svg (implementation).
*/
#define _GNU_SOURCE /* for strndup */
#include <assert.h>
#include <setjmp.h>
#include <string.h>
@ -77,6 +78,8 @@ static void svg_parse_paint_attributes(const xmlNode *node,
static void svg_parse_color(const char *s, colour *c);
static void svg_parse_font_attributes(const xmlNode *node,
struct svg_redraw_state *state);
static void svg_parse_transform_attributes(const xmlNode *node,
struct svg_redraw_state *state);
/**
@ -138,6 +141,7 @@ bool svg_convert(struct content *c, int w, int h)
struct svg_redraw_state state;
state.viewport_width = w;
state.viewport_height = h;
state.style = css_base_style;
float x, y, width, height;
svg_parse_position_attributes(svg, state, &x, &y, &width, &height);
c->width = width;
@ -180,6 +184,8 @@ bool svg_redraw(struct content *c, int x, int y,
state.style.font_size.value.length.value = option_font_size * 0.1;
state.fill = 0x000000;
state.stroke = TRANSPARENT;
state.fill = TRANSPARENT;
state.stroke = 0x000000;
state.stroke_width = 1;
plot.clg(0xffffff);
@ -218,6 +224,8 @@ bool svg_redraw_svg(xmlNode *svg, struct svg_redraw_state state)
}
}
svg_parse_transform_attributes(svg, &state);
for (xmlNode *child = svg->children; child; child = child->next) {
bool ok = true;
@ -253,6 +261,7 @@ bool svg_redraw_svg(xmlNode *svg, struct svg_redraw_state state)
bool svg_redraw_path(xmlNode *path, struct svg_redraw_state state)
{
svg_parse_paint_attributes(path, &state);
svg_parse_transform_attributes(path, &state);
/* read d attribute */
char *s = (char *) xmlGetProp(path, (const xmlChar *) "d");
@ -280,11 +289,11 @@ bool svg_redraw_path(xmlNode *path, struct svg_redraw_state state)
float x, y, x1, y1, x2, y2;
int n;
LOG(("s \"%s\"", s));
/*LOG(("s \"%s\"", s));*/
/* M, m, L, l (2 arguments) */
if (sscanf(s, " %1[MmLl] %f %f %n", command, &x, &y, &n) == 3) {
LOG(("moveto or lineto"));
/*LOG(("moveto or lineto"));*/
if (*command == 'M' || *command == 'm')
plot_command = PLOTTER_PATH_MOVE;
else
@ -303,13 +312,13 @@ bool svg_redraw_path(xmlNode *path, struct svg_redraw_state state)
/* Z, z (no arguments) */
} else if (sscanf(s, " %1[Zz] %n", command, &n) == 1) {
LOG(("closepath"));
/*LOG(("closepath"));*/
p[i++] = PLOTTER_PATH_CLOSE;
s += n;
/* H, h (1 argument) */
} else if (sscanf(s, " %1[Hh] %f %n", command, &x, &n) == 2) {
LOG(("horizontal lineto"));
/*LOG(("horizontal lineto"));*/
do {
p[i++] = PLOTTER_PATH_LINE;
if (*command == 'h')
@ -321,7 +330,7 @@ bool svg_redraw_path(xmlNode *path, struct svg_redraw_state state)
/* V, v (1 argument) */
} else if (sscanf(s, " %1[Vv] %f %n", command, &y, &n) == 2) {
LOG(("vertical lineto"));
/*LOG(("vertical lineto"));*/
do {
p[i++] = PLOTTER_PATH_LINE;
if (*command == 'v')
@ -334,7 +343,7 @@ bool svg_redraw_path(xmlNode *path, struct svg_redraw_state state)
/* C, c (6 arguments) */
} else if (sscanf(s, " %1[Cc] %f %f %f %f %f %f %n", command,
&x1, &y1, &x2, &y2, &x, &y, &n) == 7) {
LOG(("curveto"));
/*LOG(("curveto"));*/
do {
p[i++] = PLOTTER_PATH_BEZIER;
if (*command == 'c') {
@ -356,22 +365,22 @@ bool svg_redraw_path(xmlNode *path, struct svg_redraw_state state)
&x1, &y1, &x2, &y2, &x, &y, &n) == 7);
} else {
LOG(("parse failed"));
/*LOG(("parse failed"));*/
break;
}
}
LOG(("path:"));
/*LOG(("path:"));
for (unsigned int j = 0; j != i; j++) {
LOG((" %f", p[j]));
}
}*/
bool ok = plot.path(p, i, state.fill, state.stroke_width, state.stroke,
&state.ctm.a);
free(p);
return true;
return ok;
}
@ -386,6 +395,7 @@ bool svg_redraw_rect(xmlNode *rect, struct svg_redraw_state state)
svg_parse_position_attributes(rect, state,
&x, &y, &width, &height);
svg_parse_paint_attributes(rect, &state);
svg_parse_transform_attributes(rect, &state);
int p[8] = { x, y,
x + width, y,
@ -435,6 +445,7 @@ bool svg_redraw_circle(xmlNode *circle, struct svg_redraw_state state)
state.viewport_width, state);
}
svg_parse_paint_attributes(circle, &state);
svg_parse_transform_attributes(circle, &state);
int px = state.origin_x + state.ctm.a * x +
state.ctm.c * y + state.ctm.e;
@ -477,6 +488,7 @@ bool svg_redraw_line(xmlNode *line, struct svg_redraw_state state)
state.viewport_height, state);
}
svg_parse_paint_attributes(line, &state);
svg_parse_transform_attributes(line, &state);
int px1 = state.origin_x + state.ctm.a * x1 +
state.ctm.c * y1 + state.ctm.e;
@ -503,12 +515,14 @@ bool svg_redraw_text(xmlNode *text, struct svg_redraw_state state)
svg_parse_position_attributes(text, state,
&x, &y, &width, &height);
svg_parse_font_attributes(text, &state);
svg_parse_transform_attributes(text, &state);
int px = state.origin_x + state.ctm.a * x +
state.ctm.c * y + state.ctm.e;
int py = state.origin_y + state.ctm.b * x +
state.ctm.d * y + state.ctm.f;
state.ctm.e = px - state.origin_x;
state.ctm.f = py - state.origin_y;
/* state.ctm.e = px - state.origin_x; */
/* state.ctm.f = py - state.origin_y; */
struct css_style style = state.style;
style.font_size.value.length.value *= state.ctm.a;
@ -620,6 +634,34 @@ void svg_parse_paint_attributes(const xmlNode *node,
state->stroke_width = svg_parse_length(
attr->children->content,
state->viewport_width, *state);
else if (strcmp(attr->name, "style") == 0) {
const char *style = attr->children->content;
const char *s;
char *value;
if ((s = strstr(style, "fill:"))) {
s += 5;
while (*s == ' ')
s++;
value = strndup(s, strcspn(s, "; "));
svg_parse_color(value, &state->fill);
free(value);
}
if ((s = strstr(style, "stroke:"))) {
s += 7;
while (*s == ' ')
s++;
value = strndup(s, strcspn(s, "; "));
svg_parse_color(value, &state->stroke);
free(value);
}
if ((s = strstr(style, "stroke-width:"))) {
s += 13;
while (*s == ' ')
s++;
state->stroke_width = svg_parse_length(s,
state->viewport_width, *state);
}
}
}
}
@ -652,8 +694,12 @@ void svg_parse_color(const char *s, colour *c)
r = rf * 255 / 100;
*c = (b << 16) | (g << 8) | r;
}
} else if (len == 4 && strcmp(s, "none") == 0) {
*c = TRANSPARENT;
} else {
*c = named_colour(s);
colour named = named_colour(s);
if (named != CSS_COLOR_NONE)
*c = named;
}
}
@ -679,6 +725,56 @@ void svg_parse_font_attributes(const xmlNode *node,
}
/**
* Parse transform attributes, if present.
*/
void svg_parse_transform_attributes(const xmlNode *node,
struct svg_redraw_state *state)
{
float a, b, c, d, e, f;
float ctm_a, ctm_b, ctm_c, ctm_d, ctm_e, ctm_f;
int n;
/* parse transform */
xmlAttr *transform = xmlHasProp(node, (const xmlChar *) "transform");
if (transform) {
const char *s = (const char *) transform->children->content;
while (*s) {
if (sscanf(s, "matrix(%f,%f,%f,%f,%f,%f) %n",
&a, &b, &c, &d, &e, &f, &n) == 6) {
;
} else if (sscanf(s, "translate(%f,%f) %n",
&e, &f, &n) == 2) {
a = d = 1;
b = c = 0;
} else if (sscanf(s, "scale(%f,%f) %n",
&a, &d, &n) == 2) {
b = c = e = f = 0;
s += n;
} else {
break;
}
ctm_a = state->ctm.a * a + state->ctm.c * b;
ctm_b = state->ctm.b * a + state->ctm.d * b;
ctm_c = state->ctm.a * c + state->ctm.c * d;
ctm_d = state->ctm.b * c + state->ctm.d * d;
ctm_e = state->ctm.a * e + state->ctm.c * f +
state->ctm.e;
ctm_f = state->ctm.b * e + state->ctm.d * f +
state->ctm.f;
state->ctm.a = ctm_a;
state->ctm.b = ctm_b;
state->ctm.c = ctm_c;
state->ctm.d = ctm_d;
state->ctm.e = ctm_e;
state->ctm.f = ctm_f;
s += n;
}
}
}
/**
* Destroy a CONTENT_SVG and free all resources it owns.
*/