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netsurf/riscos/save_draw.c
John Mark Bell 96aa983ac6 [project @ 2004-04-06 23:23:24 by jmb] 
Fix for changed GIF data structures

svn path=/import/netsurf/; revision=734
2004-04-06 23:23:24 +00:00

624 lines
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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2004 John M Bell <jmb202@ecs.soton.ac.uk>
*/
#include <math.h>
#include <stdbool.h>
#include <string.h>
#include "oslib/drawfile.h"
#include "oslib/jpeg.h"
#include "oslib/osfile.h"
#include "netsurf/utils/config.h"
#include "netsurf/content/content.h"
#include "netsurf/css/css.h"
#include "netsurf/render/form.h"
#include "netsurf/render/layout.h"
#include "netsurf/riscos/save_draw.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/utils.h"
#ifdef WITH_DRAW_EXPORT
/* in browser units = OS/2 = draw/512 */
#define A4PAGEWIDTH (744)
#define A4PAGEHEIGHT (1052)
static unsigned long length;
static drawfile_diagram *d;
static void add_font_table(struct content *content);
static void add_options(void);
static void add_objects(struct content *content, struct box *box,
unsigned long cbc, long x, long y);
static void add_graphic(struct content *content, struct box *box,
unsigned long cbc, long x, long y);
static void add_rect(struct content *content, struct box *box,
unsigned long cbc, long x, long y, bool bg);
static void add_line(struct content *content, struct box *box,
unsigned long cbc, long x, long y);
static void add_circle(struct content *content, struct box *box,
unsigned long cbc, long x, long y);
void save_as_draw(struct content *c, char *path)
{
struct box *box;
int temp;
unsigned long bc;
if (c->type != CONTENT_HTML) {
return;
}
box = c->data.html.layout->children;
temp = c->width;
bc = 0xffffff;
d = xcalloc(40, sizeof(char));
length = 40;
memcpy((char*)&d->tag, "Draw", 4);
d->major_version = 201;
d->minor_version = 0;
memcpy((char*)&d->source, "NetSurf ", 12);
/* recalculate box widths for an A4 page */
layout_document(box, A4PAGEWIDTH);
d->bbox.x0 = 0;
d->bbox.y0 = 0;
d->bbox.x1 = A4PAGEWIDTH*512;
d->bbox.y1 = A4PAGEHEIGHT*512;
add_font_table(c);
add_options();
if (c->data.html.background_colour != TRANSPARENT) {
bc = c->data.html.background_colour;
add_rect(c, box, bc<<8, 0, A4PAGEHEIGHT*512, true);
}
/* right, traverse the tree and grab the contents */
add_objects(c, box, bc, 0, A4PAGEHEIGHT*512);
xosfile_save_stamped(path, 0xaff, (byte*)d, (byte*)d+length);
xfree(d);
/* reset layout to current window width */
layout_document(box, temp);
}
/**
* add font table
*/
void add_font_table(struct content *content) {
drawfile_object *dro;
drawfile_font_table *ft = xcalloc(0, sizeof(char));
drawfile_font_def *fd = xcalloc(0, sizeof(char));
int handle = 0, ftlen=0;
const char *name;
do {
name = enumerate_fonts(content->data.html.fonts, &handle);
if (handle == -1 && name == 0)
break;
/* at this point, handle is always (font_table entry + 1) */
fd = xrealloc(fd, 1+strlen(name)+1);
memset(fd, 0, 1+strlen(name)+1);
fd->font_index = handle;
memcpy((char*)&fd->font_name, name, strlen(name));
ft = xrealloc(ft, ftlen+1+strlen(name)+1);
memcpy((char*)ft+ftlen, fd, 1+strlen(name)+1);
ftlen += 1+strlen(name)+1;
} while (handle != -1);
/* word align end of list */
if (((ftlen+3)/4*4) != 0) {
ft = xrealloc(ft, (unsigned)(ftlen+3)/4*4);
ftlen = (ftlen+3)/4*4;
}
dro = xcalloc((unsigned)8+ftlen, sizeof(char));
dro->type = drawfile_TYPE_FONT_TABLE;
dro->size = 8+ftlen;
memcpy((char*)&dro->data.font_table, ft, (unsigned)ftlen);
d = xrealloc(d, (unsigned)length+dro->size);
memcpy((char*)&d->objects, dro, (unsigned)dro->size);
length += 8+ftlen;
xfree(fd);
xfree(ft);
xfree(dro);
}
/**
* add options object
*/
void add_options() {
drawfile_object *dro = xcalloc(8+80, sizeof(char));
drawfile_options *dfo = xcalloc(80, sizeof(char));
dfo->bbox.x0 = dfo->bbox.y0 = dfo->bbox.x1 = dfo->bbox.y1 = 0;
dfo->paper_size = 0x500; /* A4 */
dfo->paper_options = (drawfile_paper_options)0;
dfo->grid_spacing = 1;
dfo->grid_division = 2;
dfo->isometric = false;
dfo->auto_adjust = false;
dfo->show = false;
dfo->lock = false;
dfo->cm = true;
dfo->zoom_mul = 1;
dfo->zoom_div = 1;
dfo->zoom_lock = false;
dfo->toolbox = true;
dfo->entry_mode = drawfile_ENTRY_MODE_SELECT;
dfo->undo_size = 5000;
dro->type = drawfile_TYPE_OPTIONS;
dro->size = 8+80;
memcpy((char*)&dro->data.options, dfo,(unsigned)dro->size-8);
d = xrealloc(d, length+dro->size);
memcpy((char*)d+length, dro, (unsigned)dro->size);
length += dro->size;
xfree(dfo);
xfree(dro);
}
/**
* Traverses box tree, adding objects to the diagram as it goes.
*/
void add_objects(struct content *content, struct box *box,
unsigned long cbc, long x, long y) {
struct box *c;
int width, height, colour;
x += box->x * 512;
y -= box->y * 512;
width = (box->padding[LEFT] + box->width + box->padding[RIGHT]) * 2;
height = (box->padding[TOP] + box->height + box->padding[BOTTOM]) * 2;
if (box->style->visibility == CSS_VISIBILITY_HIDDEN) {
for (c = box->children; c; c = c->next)
add_objects(content, c, cbc, x, y);
return;
}
if (box->style != 0 && box->style->background_color != TRANSPARENT) {
cbc = box->style->background_color;
add_rect(content, box, cbc<<8, x, y, false);
}
if (box->object) {
if (box->object->type == CONTENT_PLUGIN ||
box->object->type == CONTENT_OTHER ||
box->object->type == CONTENT_UNKNOWN ||
box->object->type == CONTENT_HTML ||
box->object->type == CONTENT_TEXTPLAIN ||
box->object->type == CONTENT_CSS ||
box->object->type == CONTENT_DRAW) {
return; /* don't handle these */
}
else {
add_graphic(box->object, box, cbc, x, y);
return;
}
}
else if (box->gadget && (box->gadget->type == GADGET_CHECKBOX ||
box->gadget->type == GADGET_RADIO)) {
if (box->gadget->type == GADGET_CHECKBOX) {
add_rect(content, box, 0xDEDEDE00, x, y, false);
}
else {
add_circle(content, box, 0xDEDEDE00, x, y);
}
return;
}
else if (box->text && box->font) {
if (box->length == 0) {
return;
}
/* text-decoration */
colour = box->style->color;
colour = ((((colour >> 16) + (cbc >> 16)) / 2) << 16)
| (((((colour >> 8) & 0xff) +
((cbc >> 8) & 0xff)) / 2) << 8)
| ((((colour & 0xff) + (cbc & 0xff)) / 2) << 0);
if (box->style->text_decoration & CSS_TEXT_DECORATION_UNDERLINE || (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_UNDERLINE && box->parent->parent->type == BOX_BLOCK)) {
add_line(content, box, (unsigned)colour<<8, x, (int)(y+(box->height*0.1*512)));
}
if (box->style->text_decoration & CSS_TEXT_DECORATION_OVERLINE || (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_OVERLINE && box->parent->parent->type == BOX_BLOCK)) {
add_line(content, box, (unsigned)colour<<8, x, (int)(y+(box->height*0.9*512)));
}
if (box->style->text_decoration & CSS_TEXT_DECORATION_LINE_THROUGH || (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_LINE_THROUGH && box->parent->parent->type == BOX_BLOCK)) {
add_line(content, box, (unsigned)colour<<8, x, (int)(y+(box->height*0.4*512)));
}
/* normal text */
{
drawfile_object *dro = xcalloc(8+44+((box->length+1+3)/4*4), sizeof(char));
drawfile_text *dt = xcalloc(44+((box->length+1+3)/4*4), sizeof(char));
dt->bbox.x0 = x;
dt->bbox.y0 = y-(box->height*1.5*512);
dt->bbox.x1 = x+(box->width*512);
dt->bbox.y1 = y;
dt->fill = box->style->color<<8;
dt->bg_hint = cbc<<8;
dt->style.font_index = box->font->id+1;
dt->xsize = box->font->size*40;
dt->ysize = box->font->size*40;
dt->base.x = x;
dt->base.y = y-(box->height*512)+1536;
memcpy(dt->text, box->text, box->length);
dro->type = drawfile_TYPE_TEXT;
dro->size = ((box->length+1+3)/4*4) + 44 + 8;
memcpy((char*)&dro->data.text, dt, (unsigned)dro->size-8);
d = xrealloc(d, (unsigned)length + dro->size);
memcpy((char*)d+length, dro, (unsigned)dro->size);
length += dro->size;
xfree(dt);
xfree(dro);
return;
}
}
else {
for (c = box->children; c != 0; c = c->next) {
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
add_objects(content, c, cbc, x, y);
}
for (c = box->float_children; c != 0; c = c->next_float) {
add_objects(content, c, cbc, x, y);
}
}
}
/**
* Add images to the drawfile. Uses add_jpeg as a helper.
*/
void add_graphic(struct content *content, struct box *box,
unsigned long cbc, long x, long y) {
drawfile_object *dro;
drawfile_sprite *ds;
long sprite_length = 0;
/* cast-tastic... */
switch (content->type) {
case CONTENT_JPEG:
sprite_length = ((osspriteop_header*)((char*)content->data.jpeg.sprite_area+content->data.jpeg.sprite_area->first))->size;
break;
case CONTENT_PNG:
sprite_length = ((osspriteop_header*)((char*)content->data.png.sprite_area+content->data.png.sprite_area->first))->size;
break;
case CONTENT_GIF:
sprite_length = content->data.gif.gif->frame_image->size;
break;
case CONTENT_SPRITE:
sprite_length = ((osspriteop_header*)((char*)content->data.sprite.data+(((osspriteop_area*)content->data.sprite.data)->first)))->size;
break;
default:
break;
}
dro = xcalloc((unsigned)8 + 16 + sprite_length, sizeof(char));
ds = xcalloc((unsigned)16 + sprite_length, sizeof(char));
ds->bbox.x0 = x;
ds->bbox.y0 = y-((box->padding[TOP] + box->height + box->padding[BOTTOM])*512);
ds->bbox.x1 = x+((box->padding[LEFT] + box->width + box->padding[RIGHT])*512);
ds->bbox.y1 = y;
switch (content->type) {
case CONTENT_JPEG:
memcpy((char*)ds+16, (char*)content->data.jpeg.sprite_area+content->data.jpeg.sprite_area->first,
(unsigned)sprite_length);
break;
case CONTENT_PNG:
memcpy((char*)ds+16, (char*)content->data.png.sprite_area+content->data.png.sprite_area->first,
(unsigned)sprite_length);
break;
case CONTENT_GIF:
memcpy((char*)ds+16, (char*)content->data.gif.gif->frame_image,
(unsigned)sprite_length);
break;
case CONTENT_SPRITE:
memcpy((char*)ds+16, (char*)content->data.sprite.data+((osspriteop_area*)content->data.sprite.data)->first,
(unsigned)sprite_length);
break;
default:
break;
}
dro->type = drawfile_TYPE_SPRITE;
dro->size = 8 + 16 + sprite_length;
memcpy((char*)&dro->data.sprite, ds, (unsigned)16 + sprite_length);
d = xrealloc(d, length+dro->size);
memcpy((char*)d+length, dro, (unsigned)dro->size);
length += dro->size;
xfree(ds);
xfree(dro);
}
/**
* Add a filled, borderless rectangle to the diagram
* Set bg to true to produce the background rectangle.
*/
void add_rect(struct content *content, struct box *box,
unsigned long cbc, long x, long y, bool bg) {
drawfile_object *dro = xcalloc(8+96, sizeof(char));
drawfile_path *dp = xcalloc(96, sizeof(char));
draw_path_element *dpe = xcalloc(12, sizeof(char));
if (bg) {
dp->bbox.x0 = 0;
dp->bbox.y0 = 0;
dp->bbox.x1 = A4PAGEWIDTH*512;
dp->bbox.y1 = A4PAGEHEIGHT*512;
}
else {
dp->bbox.x0 = x;
dp->bbox.y0 = y-((box->padding[TOP] + box->height + box->padding[BOTTOM])*512);
dp->bbox.x1 = x+((box->padding[LEFT] + box->width + box->padding[RIGHT])*512);
dp->bbox.y1 = y;
}
dp->fill = cbc;
dp->outline = cbc;
dp->width = 0;
dp->style.flags = 0;
/**
* X<------X
* | ^
* | |
* v |
* -->X------>X
*/
/* bottom left */
dpe->tag = draw_MOVE_TO;
dpe->data.move_to.x = dp->bbox.x0;
dpe->data.move_to.y = dp->bbox.y0;
memcpy((char*)&dp->path, dpe, 12);
/* bottom right */
dpe->tag = draw_LINE_TO;
dpe->data.line_to.x = dp->bbox.x1;
dpe->data.line_to.y = dp->bbox.y0;
memcpy((char*)&dp->path+12, dpe, 12);
/* top right */
dpe->tag = draw_LINE_TO;
dpe->data.line_to.x = dp->bbox.x1;
dpe->data.line_to.y = dp->bbox.y1;
memcpy((char*)&dp->path+24, dpe, 12);
/* top left */
dpe->tag = draw_LINE_TO;
dpe->data.line_to.x = dp->bbox.x0;
dpe->data.line_to.y = dp->bbox.y1;
memcpy((char*)&dp->path+36, dpe, 12);
/* bottom left */
dpe->tag = draw_LINE_TO;
dpe->data.line_to.x = dp->bbox.x0;
dpe->data.line_to.y = dp->bbox.y0;
memcpy((char*)&dp->path+48, dpe, 12);
/* end */
dpe->tag = draw_END_PATH;
memcpy((char*)&dp->path+60, dpe, 4);
dro->type = drawfile_TYPE_PATH;
dro->size = 8+96;
memcpy((char*)&dro->data.path, dp, (unsigned)dro->size-8);
d = xrealloc(d, length+dro->size);
memcpy((char*)d+length, dro, (unsigned)dro->size);
length += dro->size;
xfree(dpe);
xfree(dp);
xfree(dro);
}
/**
* add a line to the diagram
*/
void add_line(struct content *content, struct box *box,
unsigned long cbc, long x, long y) {
drawfile_object *dro = xcalloc(8+60, sizeof(char));
drawfile_path *dp = xcalloc(60, sizeof(char));
draw_path_element *dpe = xcalloc(12, sizeof(char));
dp->bbox.x0 = x;
dp->bbox.y0 = y-((box->padding[TOP] + box->height + box->padding[BOTTOM])*512);
dp->bbox.x1 = x+((box->padding[LEFT] + box->width + box->padding[RIGHT])*512);
dp->bbox.y1 = y;
dp->fill = cbc;
dp->outline = cbc;
dp->width = 0;
dp->style.flags = 0;
/* left end */
dpe->tag = draw_MOVE_TO;
dpe->data.move_to.x = dp->bbox.x0;
dpe->data.move_to.y = dp->bbox.y0;
memcpy((char*)&dp->path, dpe, 12);
/* right end */
dpe->tag = draw_LINE_TO;
dpe->data.line_to.x = dp->bbox.x1;
dpe->data.line_to.y = dp->bbox.y0;
memcpy((char*)&dp->path+12, dpe, 12);
/* end */
dpe->tag = draw_END_PATH;
memcpy((char*)&dp->path+24, dpe, 4);
dro->type = drawfile_TYPE_PATH;
dro->size = 8+60;
memcpy((char*)&dro->data.path, dp, (unsigned)dro->size-8);
d = xrealloc(d, length+dro->size);
memcpy((char*)d+length, dro, (unsigned)dro->size);
length += dro->size;
xfree(dpe);
xfree(dp);
xfree(dro);
}
/**
* add a circle to the diagram.
*/
void add_circle(struct content *content, struct box *box,
unsigned long cbc, long x, long y) {
drawfile_object *dro = xcalloc(8+160, sizeof(char));
drawfile_path *dp = xcalloc(160, sizeof(char));
draw_path_element *dpe = xcalloc(28, sizeof(char));
double radius = 0, kappa;
double cx, cy;
dp->bbox.x0 = x;
dp->bbox.y0 = y-((box->padding[TOP] + box->height + box->padding[BOTTOM])*512);
dp->bbox.x1 = x+((box->padding[LEFT] + box->width + box->padding[RIGHT])*512);
dp->bbox.y1 = y;
cx = ((dp->bbox.x1-dp->bbox.x0)/2.0);
cy = ((dp->bbox.y1-dp->bbox.y0)/2.0);
if (cx == cy) {
radius = cx; /* box is square */
}
else if (cx > cy) {
radius = cy;
dp->bbox.x1 -= (cx-cy); /* reduce box width */
}
else if (cy > cx) {
radius = cx;
dp->bbox.y0 += (cy-cx); /* reduce box height */
}
kappa = radius * ((4.0/3.0)*(sqrt(2.0)-1.0)); /* ~= 0.5522847498 */
dp->fill = cbc;
dp->outline = cbc;
dp->width = 0;
dp->style.flags = drawfile_PATH_ROUND;
/*
* Z b Y
*
* a X c
*
* V d W
*
* V = (x0,y0)
* W = (x1,y0)
* Y = (x1,y1)
* Z = (x0,y1)
*
* X = centre of circle (x0+cx, y0+cx)
*
* The points a,b,c,d are where the circle intersects
* the bounding box. at these points, the bounding box is
* tangental to the circle.
*/
/* start at a */
dpe->tag = draw_MOVE_TO;
dpe->data.move_to.x = (dp->bbox.x0+cx)-radius;
dpe->data.move_to.y = (dp->bbox.y0+cy);
memcpy((char*)&dp->path, dpe, 12);
/* point1->point2 : (point1)(ctrl1)(ctrl2)(point2) */
/* a->b : (x-r, y)(x-r, y+k)(x-k, y+r)(x, y+r) */
dpe->tag = draw_BEZIER_TO;
dpe->data.bezier_to[0].x = (dp->bbox.x0+cx)-radius;
dpe->data.bezier_to[0].y = (dp->bbox.y0+cy)+kappa;
dpe->data.bezier_to[1].x = (dp->bbox.x0+cx)-kappa;
dpe->data.bezier_to[1].y = (dp->bbox.y0+cy)+radius;
dpe->data.bezier_to[2].x = (dp->bbox.x0+cx);
dpe->data.bezier_to[2].y = (dp->bbox.y0+cy)+radius;
memcpy((char*)&dp->path+12, dpe, 28);
/* b->c : (x, y+r)(x+k, y+r)(x+r, y+k)(x+r, y)*/
dpe->tag = draw_BEZIER_TO;
dpe->data.bezier_to[0].x = (dp->bbox.x0+cx)+kappa;
dpe->data.bezier_to[0].y = (dp->bbox.y0+cy)+radius;
dpe->data.bezier_to[1].x = (dp->bbox.x0+cx)+radius;
dpe->data.bezier_to[1].y = (dp->bbox.y0+cy)+kappa;
dpe->data.bezier_to[2].x = (dp->bbox.x0+cx)+radius;
dpe->data.bezier_to[2].y = (dp->bbox.y0+cy);
memcpy((char*)&dp->path+40, dpe, 28);
/* c->d : (x+r, y)(x+r, y-k)(x+k, y-r)(x, y-r) */
dpe->tag = draw_BEZIER_TO;
dpe->data.bezier_to[0].x = (dp->bbox.x0+cx)+radius;
dpe->data.bezier_to[0].y = (dp->bbox.y0+cy)-kappa;
dpe->data.bezier_to[1].x = (dp->bbox.x0+cx)+kappa;
dpe->data.bezier_to[1].y = (dp->bbox.y0+cy)-radius;
dpe->data.bezier_to[2].x = (dp->bbox.x0+cx);
dpe->data.bezier_to[2].y = (dp->bbox.y0+cy)-radius;
memcpy((char*)&dp->path+68, dpe, 28);
/* d->a : (x, y-r)(x-k, y-r)(x-r, y-k)(x-r, y)*/
dpe->tag = draw_BEZIER_TO;
dpe->data.bezier_to[0].x = (dp->bbox.x0+cx)-kappa;
dpe->data.bezier_to[0].y = (dp->bbox.y0+cy)-radius;
dpe->data.bezier_to[1].x = (dp->bbox.x0+cx)-radius;
dpe->data.bezier_to[1].y = (dp->bbox.y0+cy)-kappa;
dpe->data.bezier_to[2].x = (dp->bbox.x0+cx)-radius;
dpe->data.bezier_to[2].y = (dp->bbox.y0+cy);
memcpy((char*)&dp->path+96, dpe, 28);
/* end */
dpe->tag = draw_END_PATH;
memcpy((char*)&dp->path+124, dpe, 4);
dro->type = drawfile_TYPE_PATH;
dro->size = 8+160;
memcpy((char*)&dro->data.path, dp, (unsigned)dro->size-8);
d = xrealloc(d, length+dro->size);
memcpy((char*)d+length, dro, (unsigned)dro->size);
length += dro->size;
xfree(dpe);
xfree(dp);
xfree(dro);
}
#endif
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