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netsurf/riscos/save_draw.c
John Mark Bell 2565a37a52 Refactor text plotter and other font functions to remove dependency on CSS. 
svn path=/trunk/netsurf/; revision=8641
2009-07-21 10:59:53 +00:00

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/*
* Copyright 2004 John M Bell <jmb202@ecs.soton.ac.uk>
* Copyright 2004-2008 John Tytgat <joty@netsurf-browser.org>
* Copyright 2007 James Bursa <bursa@users.sourceforge.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Export a content as a DrawFile (implementation).
*/
#ifdef WITH_DRAW_EXPORT
#include <assert.h>
#include <limits.h>
#include "oslib/draw.h"
#include "oslib/osfile.h"
#include "pencil.h"
#include "content/content.h"
#include "desktop/plotters.h"
#include "riscos/bitmap.h"
#include "riscos/gui.h"
#include "riscos/save_draw.h"
#include "utils/log.h"
#include "utils/utils.h"
static bool ro_save_draw_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style);
static bool ro_save_draw_line(int x0, int y0, int x1, int y1, const plot_style_t *style);
static bool ro_save_draw_polygon(const int *p, unsigned int n, const plot_style_t *style);
static bool ro_save_draw_path(const float *p, unsigned int n, colour fill,
float width, colour c, const float transform[6]);
static bool ro_save_draw_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1);
static bool ro_save_draw_text(int x, int y, const char *text, size_t length,
const plot_font_style_t *fstyle);
static bool ro_save_draw_disc(int x, int y, int radius, const plot_style_t *style);
static bool ro_save_draw_arc(int x, int y, int radius, int angle1, int angle2,
const plot_style_t *style);
static bool ro_save_draw_bitmap(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg, bitmap_flags_t flags);
static bool ro_save_draw_group_start(const char *name);
static bool ro_save_draw_group_end(void);
static bool ro_save_draw_error(pencil_code code);
static const struct plotter_table ro_save_draw_plotters = {
.rectangle = ro_save_draw_rectangle,
.line = ro_save_draw_line,
.polygon = ro_save_draw_polygon,
.clip = ro_save_draw_clip,
.text = ro_save_draw_text,
.disc = ro_save_draw_disc,
.arc = ro_save_draw_arc,
.bitmap = ro_save_draw_bitmap,
.group_start = ro_save_draw_group_start,
.group_end = ro_save_draw_group_end,
.path = ro_save_draw_path,
.option_knockout = false,
};
static struct pencil_diagram *ro_save_draw_diagram;
static int ro_save_draw_width;
static int ro_save_draw_height;
/**
* Export a content as a DrawFile.
*
* \param c content to export
* \param path path to save DrawFile as
* \return true on success, false on error and error reported
*/
bool save_as_draw(struct content *c, const char *path)
{
pencil_code code;
char *drawfile_buffer;
size_t drawfile_size;
os_error *error;
ro_save_draw_diagram = pencil_create();
if (!ro_save_draw_diagram) {
warn_user("NoMemory", 0);
return false;
}
ro_save_draw_width = c->width;
ro_save_draw_height = c->height;
plot = ro_save_draw_plotters;
if (!content_redraw(c, 0, -c->height,
c->width, c->height,
INT_MIN, INT_MIN, INT_MAX, INT_MAX,
1,
0xFFFFFF))
{
pencil_free(ro_save_draw_diagram);
return false;
}
/*pencil_dump(ro_save_draw_diagram);*/
code = pencil_save_drawfile(ro_save_draw_diagram, "NetSurf",
&drawfile_buffer, &drawfile_size);
if (code != pencil_OK) {
warn_user("SaveError", 0);
pencil_free(ro_save_draw_diagram);
return false;
}
assert(drawfile_buffer);
error = xosfile_save_stamped(path, osfile_TYPE_DRAW,
(byte *) drawfile_buffer,
(byte *) drawfile_buffer + drawfile_size);
if (error) {
LOG(("xosfile_save_stamped failed: 0x%x: %s",
error->errnum, error->errmess));
warn_user("SaveError", error->errmess);
pencil_free(ro_save_draw_diagram);
return false;
}
pencil_free(ro_save_draw_diagram);
return true;
}
bool ro_save_draw_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
pencil_code code;
const int path[] = { draw_MOVE_TO, x0 * 2, -y0 * 2 - 1,
draw_LINE_TO, x1 * 2, -y0 * 2 - 1,
draw_LINE_TO, x1 * 2, -y1 * 2 - 1,
draw_LINE_TO, x0 * 2, -y1 * 2 - 1,
draw_CLOSE_LINE,
draw_END_PATH };
if (style->fill_type != PLOT_OP_TYPE_NONE) {
code = pencil_path(ro_save_draw_diagram,
path,
sizeof path / sizeof path[0],
style->fill_colour << 8,
pencil_TRANSPARENT,
0,
pencil_JOIN_MITRED,
pencil_CAP_BUTT,
pencil_CAP_BUTT,
0,
0,
false,
pencil_SOLID);
if (code != pencil_OK)
return ro_save_draw_error(code);
}
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
code = pencil_path(ro_save_draw_diagram,
path,
sizeof path / sizeof path[0],
pencil_TRANSPARENT,
style->stroke_colour << 8,
style->stroke_width,
pencil_JOIN_MITRED,
pencil_CAP_BUTT,
pencil_CAP_BUTT,
0,
0,
false,
pencil_SOLID);
if (code != pencil_OK)
return ro_save_draw_error(code);
}
return true;
}
bool ro_save_draw_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
pencil_code code;
const int path[] = { draw_MOVE_TO, x0 * 2, -y0 * 2 - 1,
draw_LINE_TO, x1 * 2, -y1 * 2 - 1,
draw_END_PATH };
code = pencil_path(ro_save_draw_diagram,
path,
sizeof path / sizeof path[0],
pencil_TRANSPARENT,
style->stroke_colour << 8,
style->stroke_width,
pencil_JOIN_MITRED,
pencil_CAP_BUTT,
pencil_CAP_BUTT,
0, 0, false,
pencil_SOLID);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
bool ro_save_draw_polygon(const int *p, unsigned int n, const plot_style_t *style)
{
pencil_code code;
int path[n * 3 + 1];
unsigned int i;
for (i = 0; i != n; i++) {
path[i * 3 + 0] = draw_LINE_TO;
path[i * 3 + 1] = p[i * 2 + 0] * 2;
path[i * 3 + 2] = -p[i * 2 + 1] * 2;
}
path[0] = draw_MOVE_TO;
path[n * 3] = draw_END_PATH;
code = pencil_path(ro_save_draw_diagram,
path, n * 3 + 1,
style->fill_colour << 8,
pencil_TRANSPARENT,
0,
pencil_JOIN_MITRED,
pencil_CAP_BUTT,
pencil_CAP_BUTT,
0,
0,
false,
pencil_SOLID);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
bool ro_save_draw_path(const float *p, unsigned int n, colour fill,
float width, colour c, const float transform[6])
{
if (n == 0)
return true;
if (p[0] != PLOTTER_PATH_MOVE) {
LOG(("path doesn't start with a move"));
return false;
}
int *path = malloc(sizeof *path * (n + 10));
if (!path) {
LOG(("out of memory"));
return false;
}
unsigned int i;
bool empty_path = true;
for (i = 0; i < n; ) {
if (p[i] == PLOTTER_PATH_MOVE) {
path[i] = draw_MOVE_TO;
path[i + 1] = (transform[0] * p[i + 1] +
transform[2] * -p[i + 2] +
transform[4]) * 2;
path[i + 2] = (transform[1] * p[i + 1] +
transform[3] * -p[i + 2] +
-transform[5]) * 2;
i += 3;
} else if (p[i] == PLOTTER_PATH_CLOSE) {
path[i] = draw_CLOSE_LINE;
i++;
} else if (p[i] == PLOTTER_PATH_LINE) {
path[i] = draw_LINE_TO;
path[i + 1] = (transform[0] * p[i + 1] +
transform[2] * -p[i + 2] +
transform[4]) * 2;
path[i + 2] = (transform[1] * p[i + 1] +
transform[3] * -p[i + 2] +
-transform[5]) * 2;
i += 3;
empty_path = false;
} else if (p[i] == PLOTTER_PATH_BEZIER) {
path[i] = draw_BEZIER_TO;
path[i + 1] = (transform[0] * p[i + 1] +
transform[2] * -p[i + 2] +
transform[4]) * 2;
path[i + 2] = (transform[1] * p[i + 1] +
transform[3] * -p[i + 2] +
-transform[5]) * 2;
path[i + 3] = (transform[0] * p[i + 3] +
transform[2] * -p[i + 4] +
transform[4]) * 2;
path[i + 4] = (transform[1] * p[i + 3] +
transform[3] * -p[i + 4] +
-transform[5]) * 2;
path[i + 5] = (transform[0] * p[i + 5] +
transform[2] * -p[i + 6] +
transform[4]) * 2;
path[i + 6] = (transform[1] * p[i + 5] +
transform[3] * -p[i + 6] +
-transform[5]) * 2;
i += 7;
empty_path = false;
} else {
LOG(("bad path command %f", p[i]));
free(path);
return false;
}
}
path[i] = draw_END_PATH;
if (empty_path) {
free(path);
return true;
}
pencil_code code = pencil_path(ro_save_draw_diagram, path, i + 1,
fill == NS_TRANSPARENT ? pencil_TRANSPARENT : fill << 8,
c == NS_TRANSPARENT ? pencil_TRANSPARENT : c << 8,
width, pencil_JOIN_MITRED,
pencil_CAP_BUTT, pencil_CAP_BUTT, 0, 0, false,
pencil_SOLID);
free(path);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
bool ro_save_draw_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1)
{
return true;
}
bool ro_save_draw_text(int x, int y, const char *text, size_t length,
const plot_font_style_t *fstyle)
{
pencil_code code;
const char *font_family;
unsigned int font_size;
rufl_style font_style;
nsfont_read_style(fstyle, &font_family, &font_size, &font_style);
code = pencil_text(ro_save_draw_diagram, x * 2, -y * 2, font_family,
font_style, font_size, text, length,
fstyle->foreground << 8);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
bool ro_save_draw_disc(int x, int y, int radius, const plot_style_t *style)
{
return true;
}
bool ro_save_draw_arc(int x, int y, int radius, int angle1, int angle2,
const plot_style_t *style)
{
return true;
}
bool ro_save_draw_bitmap(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg, bitmap_flags_t flags)
{
pencil_code code;
const uint8_t *buffer;
buffer = bitmap_get_buffer(bitmap);
if (!buffer) {
warn_user("NoMemory", 0);
return false;
}
code = pencil_sprite(ro_save_draw_diagram, x * 2, (-y - height) * 2,
width * 2, height * 2,
((char *) bitmap->sprite_area) +
bitmap->sprite_area->first);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
bool ro_save_draw_group_start(const char *name)
{
pencil_code code;
code = pencil_group_start(ro_save_draw_diagram, name);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
bool ro_save_draw_group_end(void)
{
pencil_code code;
code = pencil_group_end(ro_save_draw_diagram);
if (code != pencil_OK)
return ro_save_draw_error(code);
return true;
}
/**
* Report an error from pencil.
*
* \param code error code
* \return false
*/
bool ro_save_draw_error(pencil_code code)
{
LOG(("code %i", code));
switch (code) {
case pencil_OK:
assert(0);
break;
case pencil_OUT_OF_MEMORY:
warn_user("NoMemory", 0);
break;
case pencil_FONT_MANAGER_ERROR:
warn_user("SaveError", rufl_fm_error->errmess);
break;
case pencil_FONT_NOT_FOUND:
case pencil_IO_ERROR:
case pencil_IO_EOF:
warn_user("SaveError", "generating the DrawFile failed");
break;
}
return false;
}
#endif
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