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netsurf/riscos/htmlredraw.c
Richard Wilson 1fbcdd14d5 [project @ 2004-11-02 23:23:07 by rjw] 
Fix for recent GIF decoding bug. Rectangular pixel mode-friendly sprites for hotlist. Slight change to history image size to please Tinct. Support for foreground and background image quality settings. Support for error diffusion and bi-linear filtering (Tinct still requires some further work)

svn path=/import/netsurf/; revision=1336
2004-11-02 23:23:07 +00:00

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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 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
*/
/** \file
* Redraw of a CONTENT_HTML (RISC OS implementation).
*/
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include "oslib/colourtrans.h"
#include "oslib/draw.h"
#include "oslib/font.h"
#include "oslib/os.h"
#include "oslib/wimp.h"
#include "netsurf/utils/config.h"
#include "netsurf/content/content.h"
#include "netsurf/css/css.h"
#include "netsurf/render/box.h"
#include "netsurf/render/font.h"
#include "netsurf/render/form.h"
#include "netsurf/render/html.h"
#include "netsurf/riscos/bitmap.h"
#include "netsurf/riscos/gui.h"
#include "netsurf/riscos/image.h"
#include "netsurf/riscos/options.h"
#include "netsurf/riscos/theme.h"
#include "netsurf/riscos/ufont.h"
#include "netsurf/riscos/wimp.h"
#include "netsurf/utils/log.h"
#include "netsurf/utils/messages.h"
#include "netsurf/utils/utils.h"
static bool html_redraw_box(struct box *box,
int x, int y,
unsigned long current_background_color,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale);
static bool html_redraw_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1);
static bool html_redraw_rectangle(int x0, int y0, int width, int height,
os_colour colour);
static bool html_redraw_fill(int x0, int y0, int width, int height,
os_colour colour);
static bool html_redraw_circle(int x0, int y0, int radius,
os_colour colour);
static bool html_redraw_border(colour color, int width, css_border_style style,
int x0, int y0, int x1, int y1);
static bool html_redraw_checkbox(int x, int y, int width, int height,
bool selected);
static bool html_redraw_radio(int x, int y, int width, int height,
bool selected);
static bool html_redraw_file(int x, int y, int width, int height,
struct box *box, float scale);
static bool html_redraw_background(int x, int y, int width, int height,
struct box *box, float scale,
unsigned long background_colour);
bool gui_redraw_debug = false;
static int ro_gui_redraw_box_depth;
static os_trfm trfm = { {
{ 65536, 0 },
{ 0, 65536 },
{ 0, 0 } } };
/**
* Draw a CONTENT_HTML to a RISC OS window.
*
* \param c content of type CONTENT_HTML
* \param x coordinate for top-left of redraw
* \param y coordinate for top-left of redraw
* \param width available width (not used for HTML redraw)
* \param height available height (not used for HTML redraw)
* \param clip_x0 clip rectangle
* \param clip_y0 clip rectangle
* \param clip_x1 clip rectangle
* \param clip_y1 clip rectangle
* \param scale scale for redraw
* \param background_colour the background colour
* \return true if successful, false otherwise
*
* x, y, clip_[xy][01] are in RISC OS screen absolute OS-units.
*/
bool html_redraw(struct content *c, int x, int y,
int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, unsigned long background_colour)
{
struct box *box;
os_error *error;
assert(c->data.html.layout != NULL);
box = c->data.html.layout->children;
assert(box);
/* clear to background colour */
if (c->data.html.background_colour != TRANSPARENT)
background_colour = c->data.html.background_colour;
error = xcolourtrans_set_gcol(background_colour << 8,
colourtrans_SET_BG | colourtrans_USE_ECFS,
os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
error = xos_clg();
if (error) {
LOG(("xos_clg: 0x%x: %s", error->errnum, error->errmess));
}
trfm.entries[0][0] = trfm.entries[1][1] = 65536 * scale;
ro_gui_redraw_box_depth = 0;
return html_redraw_box(box, x, y, background_colour,
clip_x0, clip_y0, clip_x1, clip_y1, scale);
}
/**
* Recursively draw a box to a RISC OS window.
*
* \param box box to draw
* \param x coordinate of parent box
* \param y coordinate of parent box
* \param current_background_color background colour under this box
* \param clip_x0 clip rectangle
* \param clip_y0 clip rectangle
* \param clip_x1 clip rectangle
* \param clip_y1 clip rectangle
* \param scale scale for redraw
* \return true if successful, false otherwise
*
* x, y, clip_[xy][01] are in RISC OS screen absolute OS-units.
*/
bool html_redraw_box(struct box *box,
int x, int y,
unsigned long current_background_color,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale)
{
struct box *c;
int width, height;
int padding_left, padding_top, padding_width, padding_height;
int x0, y0, x1, y1;
int colour;
int x_scrolled, y_scrolled;
os_error *error;
ro_gui_redraw_box_depth++;
x += box->x * 2 * scale;
y -= box->y * 2 * scale;
width = box->width * 2 * scale;
height = box->height * 2 * scale;
padding_left = box->padding[LEFT] * 2 * scale;
padding_top = box->padding[TOP] * 2 * scale;
padding_width = (box->padding[LEFT] + box->width +
box->padding[RIGHT]) * 2 * scale;
padding_height = (box->padding[TOP] + box->height +
box->padding[BOTTOM]) * 2 * scale;
x_scrolled = x - box->scroll_x * 2 * scale;
y_scrolled = y + box->scroll_y * 2 * scale;
/* calculate clip rectangle for this box */
if (box->style && box->style->overflow != CSS_OVERFLOW_VISIBLE) {
x0 = x;
y0 = y - padding_height;
x1 = x + padding_width - 1;
y1 = y - 1;
} else {
x0 = x + box->descendant_x0 * 2 * scale;
y0 = y - box->descendant_y1 * 2 * scale;
x1 = x + box->descendant_x1 * 2 * scale + 1;
y1 = y - box->descendant_y0 * 2 * scale + 1;
}
/* if visibility is hidden render children only */
if (box->style && box->style->visibility == CSS_VISIBILITY_HIDDEN) {
for (c = box->children; c; c = c->next)
if (!html_redraw_box(c, x_scrolled, y_scrolled,
current_background_color,
x0, y0, x1, y1, scale))
return false;
return true;
}
if (gui_redraw_debug) {
if (!html_redraw_rectangle(x, y, padding_width,
padding_height, os_COLOUR_MAGENTA))
return false;
if (!html_redraw_rectangle(x + padding_left, y - padding_top,
width, height, os_COLOUR_CYAN))
return false;
if (!html_redraw_rectangle(x - (box->border[LEFT] +
box->margin[LEFT]) * 2 * scale,
y + (box->border[TOP] + box->margin[TOP]) *
2 * scale,
padding_width + (box->border[LEFT] +
box->margin[LEFT] + box->border[RIGHT] +
box->margin[RIGHT]) * 2 * scale,
padding_height + (box->border[TOP] +
box->margin[TOP] + box->border[BOTTOM] +
box->margin[BOTTOM]) * 2 * scale,
os_COLOUR_YELLOW))
return false;
}
/* borders */
if (box->style && box->border[TOP])
if (!html_redraw_border(box->style->border[TOP].color,
box->border[TOP] * 2 * scale,
box->style->border[TOP].style,
x - box->border[LEFT] * 2 * scale,
y + box->border[TOP] * scale,
x + padding_width + box->border[RIGHT] *
2 * scale,
y + box->border[TOP] * scale))
return false;
if (box->style && box->border[RIGHT])
if (!html_redraw_border(box->style->border[RIGHT].color,
box->border[RIGHT] * 2 * scale,
box->style->border[RIGHT].style,
x + padding_width + box->border[RIGHT] * scale,
y + box->border[TOP] * 2 * scale,
x + padding_width + box->border[RIGHT] * scale,
y - padding_height - box->border[BOTTOM] *
2 * scale))
return false;
if (box->style && box->border[BOTTOM])
if (!html_redraw_border(box->style->border[BOTTOM].color,
box->border[BOTTOM] * 2 * scale,
box->style->border[BOTTOM].style,
x - box->border[LEFT] * 2 * scale,
y - padding_height - box->border[BOTTOM] *
scale,
x + padding_width + box->border[RIGHT] *
2 * scale,
y - padding_height - box->border[BOTTOM] *
scale))
return false;
if (box->style && box->border[LEFT])
if (!html_redraw_border(box->style->border[LEFT].color,
box->border[LEFT] * 2 * scale,
box->style->border[LEFT].style,
x - box->border[LEFT] * scale,
y + box->border[TOP] * 2 * scale,
x - box->border[LEFT] * scale,
y - padding_height - box->border[BOTTOM] *
2 * scale))
return false;
/* return if the box is completely outside the clip rectangle */
if ((ro_gui_redraw_box_depth > 2) &&
(clip_y1 < y0 || y1 < clip_y0 || clip_x1 < x0 || x1 < clip_x0))
return true;
if ((ro_gui_redraw_box_depth > 2) &&
(box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->object)) {
/* find intersection of clip rectangle and box */
if (x0 < clip_x0) x0 = clip_x0;
if (y0 < clip_y0) y0 = clip_y0;
if (clip_x1 < x1) x1 = clip_x1;
if (clip_y1 < y1) y1 = clip_y1;
/* clip to it */
if (!html_redraw_clip(x0, y0, x1, y1))
return false;
} else {
/* clip box unchanged */
x0 = clip_x0;
y0 = clip_y0;
x1 = clip_x1;
y1 = clip_y1;
}
/* background colour and image */
if (box->style && (box->type != BOX_INLINE ||
box->style != box->parent->parent->style)) {
/* find intersection of clip box and padding box */
int px0 = x < x0 ? x0 : x;
int py0 = y - padding_height < y0 ? y0 : y - padding_height;
int px1 = x + padding_width < x1 ? x + padding_width : x1;
int py1 = y < y1 ? y : y1;
/* background colour */
if ((box->style->background_color != TRANSPARENT) &&
/* don't redraw background if there is an image covering it */
((box->style->background_repeat != CSS_BACKGROUND_REPEAT_REPEAT) ||
(box->background->bitmap == NULL) ||
(ro_gui_current_redraw_gui == NULL) ||
(!ro_gui_current_redraw_gui->option.background_images) ||
(!box->background->bitmap->opaque))) {
if (ro_gui_redraw_box_depth > 2) {
error = xcolourtrans_set_gcol(
box->style->background_color << 8,
colourtrans_USE_ECFS,
os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_plot(os_MOVE_TO, px0, py0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
if (px0 < px1 && py0 < py1) {
error = xos_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
px1 - 1, py1 - 1);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
}
}
/* set current background color for font painting */
current_background_color = box->style->background_color;
}
if (box->background) {
/* clip to padding box for everything but the main window */
if (ro_gui_redraw_box_depth > 2) {
if (!html_redraw_clip(px0, py0, px1, py1))
return false;
} else {
if (!html_redraw_clip(clip_x0, clip_y0, clip_x1, clip_y1))
return false;
}
/* plot background image */
if (!html_redraw_background(x, y, width, clip_y1 - clip_y0,
box, scale,
current_background_color))
return false;
/* restore previous graphics window */
if (!html_redraw_clip(x0, y0, x1, y1))
return false;
}
}
if (box->object) {
if (!content_redraw(box->object, x + padding_left, y - padding_top,
width, height, x0, y0, x1, y1, scale,
current_background_color))
return false;
} else if (box->gadget && box->gadget->type == GADGET_CHECKBOX) {
if (!html_redraw_checkbox(x + padding_left, y - padding_top,
width, height,
box->gadget->selected))
return false;
} else if (box->gadget && box->gadget->type == GADGET_RADIO) {
if (!html_redraw_radio(x + padding_left, y - padding_top,
width, height,
box->gadget->selected))
return false;
} else if (box->gadget && box->gadget->type == GADGET_FILE) {
error = xcolourtrans_set_font_colours(box->font->handle,
current_background_color << 8,
print_text_black ? os_COLOUR_BLACK :
box->style->color << 8,
14, 0, 0, 0);
if (error) {
LOG(("xcolourtrans_set_font_colours: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
if (!html_redraw_file(x + padding_left, y - padding_top,
width, height, box, scale))
return false;
} else if (box->text && box->font) {
error = xcolourtrans_set_font_colours(box->font->handle,
current_background_color << 8,
print_text_black ? os_COLOUR_BLACK :
box->style->color << 8,
14, 0, 0, 0);
if (error) {
LOG(("xcolourtrans_set_font_colours: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
/* antialias colour for under/overline */
colour = print_text_black ? os_COLOUR_BLACK : box->style->color;
colour = ((((colour >> 16) + (current_background_color >> 16)) / 2) << 16)
| (((((colour >> 8) & 0xff) +
((current_background_color >> 8) & 0xff)) / 2) << 8)
| ((((colour & 0xff) +
(current_background_color & 0xff)) / 2) << 0);
error = xcolourtrans_set_gcol((unsigned int)colour << 8, colourtrans_USE_ECFS,
os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
if (box->style->text_decoration & CSS_TEXT_DECORATION_UNDERLINE) {
error = xos_plot(os_MOVE_TO, x, y - (int) (box->height * 1.8 * scale));
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
}
if (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_UNDERLINE && box->parent->parent->type == BOX_BLOCK) {
error = xcolourtrans_set_gcol((unsigned int)box->parent->parent->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_MOVE_TO, x, y - (int) (box->height * 1.8 * scale));
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xcolourtrans_set_gcol((unsigned int)box->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
}
if (box->style->text_decoration & CSS_TEXT_DECORATION_OVERLINE) {
error = xos_plot(os_MOVE_TO, x, y - (int) (box->height * 0.2 * scale));
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
}
if (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_OVERLINE && box->parent->parent->type == BOX_BLOCK) {
error = xcolourtrans_set_gcol((unsigned int)box->parent->parent->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_MOVE_TO, x, y - (int) (box->height * 0.2 * scale));
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xcolourtrans_set_gcol((unsigned int)box->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
}
if (box->style->text_decoration & CSS_TEXT_DECORATION_LINE_THROUGH) {
error = xos_plot(os_MOVE_TO, x, y - (int) (box->height * 1.0 * scale));
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
}
if (box->parent->parent->style->text_decoration & CSS_TEXT_DECORATION_LINE_THROUGH && box->parent->parent->type == BOX_BLOCK) {
error = xcolourtrans_set_gcol((unsigned int)box->parent->parent->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_MOVE_TO, x, y - (int) (box->height * 1.0 * scale));
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_plot(os_PLOT_SOLID_EX_END | os_PLOT_BY, box->width * 2 * scale, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xcolourtrans_set_gcol((unsigned int)box->style->color << 8, colourtrans_USE_ECFS, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
}
if (scale == 1)
nsfont_paint(box->font, box->text, box->length,
x, y - (int) (box->height * 1.5),
NULL);
else
nsfont_paint(box->font, box->text, box->length,
x, y - (int) (box->height * 1.5 * scale),
&trfm);
} else {
for (c = box->children; c != 0; c = c->next)
if (c->type != BOX_FLOAT_LEFT && c->type != BOX_FLOAT_RIGHT)
if (!html_redraw_box(c, x_scrolled, y_scrolled,
current_background_color,
x0, y0, x1, y1, scale))
return false;
for (c = box->float_children; c != 0; c = c->next_float)
if (!html_redraw_box(c, x_scrolled, y_scrolled,
current_background_color,
x0, y0, x1, y1, scale))
return false;
}
if (box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->object)
if (!html_redraw_clip(clip_x0, clip_y0, clip_x1, clip_y1))
return false;
return true;
}
/**
* Set the clip rectangle.
*/
bool html_redraw_clip(int clip_x0, int clip_y0,
int clip_x1, int clip_y1)
{
os_error *error;
error = xos_set_graphics_window();
if (error) {
LOG(("xos_set_graphics_window: 0x%x: %s", error->errnum,
error->errmess));
return false;
}
error = xos_writec((char) (clip_x0 & 0xff));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_writec((char) (clip_x0 >> 8));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_writec((char) (clip_y0 & 0xff));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_writec((char) (clip_y0 >> 8));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_writec((char) (clip_x1 & 0xff));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_writec((char) (clip_x1 >> 8));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_writec((char) (clip_y1 & 0xff));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_writec((char) (clip_y1 >> 8));
if (error) {
LOG(("xos_writec: 0x%x: %s", error->errnum, error->errmess));
return false;
}
return true;
}
/**
* Plot a dotted rectangle outline.
*/
bool html_redraw_rectangle(int x0, int y0, int width, int height,
os_colour colour)
{
os_error *error;
error = xcolourtrans_set_gcol(colour, 0, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
error = xos_plot(os_MOVE_TO, x0, y0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_plot(os_PLOT_DOTTED | os_PLOT_BY, width, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_plot(os_PLOT_DOTTED | os_PLOT_BY, 0, -height);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_plot(os_PLOT_DOTTED | os_PLOT_BY, -width, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_plot(os_PLOT_DOTTED | os_PLOT_BY, 0, height);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
return true;
}
/**
* Fill a rectangle of colour.
*/
bool html_redraw_fill(int x0, int y0, int width, int height,
os_colour colour)
{
os_error *error;
error = xcolourtrans_set_gcol(colour, 0, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
error = xos_plot(os_MOVE_TO, x0, y0 - height);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_plot(os_PLOT_RECTANGLE | os_PLOT_BY, width - 1, height - 1);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
return true;
}
/**
* Fill a circle of colour.
*/
bool html_redraw_circle(int x0, int y0, int radius,
os_colour colour)
{
os_error *error;
error = xcolourtrans_set_gcol(colour, 0, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
error = xos_plot(os_MOVE_TO, x0, y0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
error = xos_plot(os_PLOT_CIRCLE | os_PLOT_BY, radius, 0);
if (error) {
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
return false;
}
return true;
}
static int path[] = { draw_MOVE_TO, 0, 0, draw_LINE_TO, 0, 0,
draw_END_PATH, 0 };
static const draw_line_style line_style = { draw_JOIN_MITRED,
draw_CAP_BUTT, draw_CAP_BUTT, 0, 0x7fffffff,
0, 0, 0, 0 };
static const int dash_pattern_dotted[] = { 0, 1, 512 };
static const int dash_pattern_dashed[] = { 0, 1, 2048 };
/**
* Draw a border.
*/
bool html_redraw_border(colour color, int width, css_border_style style,
int x0, int y0, int x1, int y1)
{
const draw_dash_pattern *dash_pattern;
os_error *error;
if (style == CSS_BORDER_STYLE_DOTTED)
dash_pattern = (const draw_dash_pattern *) &dash_pattern_dotted;
else if (style == CSS_BORDER_STYLE_DASHED)
dash_pattern = (const draw_dash_pattern *) &dash_pattern_dashed;
else
dash_pattern = NULL;
path[1] = x0 * 256;
path[2] = y0 * 256;
path[4] = x1 * 256;
path[5] = y1 * 256;
error = xcolourtrans_set_gcol(color << 8, 0, os_ACTION_OVERWRITE, 0, 0);
if (error) {
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
error = xdraw_stroke((draw_path *) path, 0, 0, 0, width * 256,
&line_style, dash_pattern);
if (error) {
LOG(("xdraw_stroke: 0x%x: %s",
error->errnum, error->errmess));
return false;
}
return true;
}
/**
* Plot a checkbox.
*/
bool html_redraw_checkbox(int x, int y, int width, int height,
bool selected)
{
int z = width * 0.15;
if (z == 0)
z = 1;
if (!html_redraw_fill(x, y, width, height, os_COLOUR_BLACK))
return false;
if (!html_redraw_fill(x + z, y - z, width - z - z, height - z - z,
os_COLOUR_WHITE))
return false;
if (selected)
if (!html_redraw_fill(x + z + z, y - z - z,
width - z - z - z - z, height - z - z - z - z,
os_COLOUR_RED))
return false;
return true;
}
/**
* Plot a radio icon.
*/
bool html_redraw_radio(int x, int y, int width, int height,
bool selected)
{
if (!html_redraw_circle(x + width * 0.5, y - height * 0.5,
width * 0.5 - 1, os_COLOUR_BLACK))
return false;
if (!html_redraw_circle(x + width * 0.5, y - height * 0.5,
width * 0.4 - 1, os_COLOUR_WHITE))
return false;
if (selected)
if (!html_redraw_circle(x + width * 0.5, y - height * 0.5,
width * 0.3 - 1, os_COLOUR_RED))
return false;
return true;
}
/**
* Plot a file upload input.
*/
bool html_redraw_file(int x, int y, int width, int height,
struct box *box, float scale)
{
int text_width;
const char *text;
const char *sprite;
size_t length;
if (box->gadget->value) {
text = box->gadget->value;
sprite = "file_fff";
} else {
text = messages_get("Form_Drop");
sprite = "drophere";
}
length = strlen(text);
text_width = nsfont_width(box->font, text, length) * 2 * scale;
if (width < text_width + 8)
x = x + width - text_width - 4;
else
x = x + 4;
nsfont_paint(box->font, text, length, x, y - height * 0.75, &trfm);
/* xwimpspriteop_put_sprite_user_coords(sprite, x + 4, */
/* y - height / 2 - 17, os_ACTION_OVERWRITE); */
return true;
}
bool html_redraw_background(int xi, int yi, int width, int height,
struct box *box, float scale, unsigned long background_colour)
{
int x = 0;
int y = 0;
unsigned int image_width, image_height;
os_coord image_size;
float multiplier;
bool fixed = false;
wimp_window_state state;
os_error *error;
bool repeat_x = false;
bool repeat_y = false;
if (box->background == 0) return true;
state.w = 0;
if (ro_gui_current_redraw_gui) {
/* exit if background images aren't wanted */
if (!ro_gui_current_redraw_gui->option.background_images)
return true;
/* read state of window we're drawing in */
state.w = ro_gui_current_redraw_gui->window;
error = xwimp_get_window_state(&state);
if (error) {
/* not fatal: fixed backgrounds will scroll. */
LOG(("xwimp_get_window_state: 0x%x: %s",
error->errnum, error->errmess));
/* invalidate state.w */
state.w = 0;
}
}
else {
/* exit if background images aren't wanted */
if (!option_background_images)
return true;
}
/* Get the image dimensions for our positioning and scaling */
image_size.x = box->background->width * scale;
image_size.y = box->background->height * scale;
/* handle background-attachment */
switch (box->style->background_attachment) {
case CSS_BACKGROUND_ATTACHMENT_FIXED:
/* uncomment this to enable fixed backgrounds */
/*if (state.w != 0)
fixed = true;*/
break;
case CSS_BACKGROUND_ATTACHMENT_SCROLL:
break;
default:
break;
}
/* handle background-repeat */
switch (box->style->background_repeat) {
case CSS_BACKGROUND_REPEAT_REPEAT:
repeat_x = repeat_y = true;
break;
case CSS_BACKGROUND_REPEAT_REPEAT_X:
repeat_x = true;
break;
case CSS_BACKGROUND_REPEAT_REPEAT_Y:
repeat_y = true;
break;
case CSS_BACKGROUND_REPEAT_NO_REPEAT:
break;
default:
break;
}
/* fixed background */
if (fixed) {
int toolbar_height = 0;
/* get toolbar height */
if (ro_gui_current_redraw_gui &&
ro_gui_current_redraw_gui->toolbar)
toolbar_height = ro_gui_current_redraw_gui->
toolbar->height;
/* top left of viewport, taking account of toolbar height */
x = state.visible.x0;
y = state.visible.y1 - toolbar_height;
/* handle background-position */
switch (box->style->background_position.horz.pos) {
case CSS_BACKGROUND_POSITION_PERCENT:
multiplier = box->style->background_position.horz.value.percent / 100;
x += ((state.visible.x1 - state.visible.x0) - (image_size.x * 2)) * multiplier;
break;
case CSS_BACKGROUND_POSITION_LENGTH:
x += (int)(2. * css_len2px(&box->style->background_position.horz.value.length, box->style) * scale);
break;
default:
break;
}
switch (box->style->background_position.vert.pos) {
case CSS_BACKGROUND_POSITION_PERCENT:
multiplier = box->style->background_position.vert.value.percent / 100;
y -= ((state.visible.y1 - state.visible.y0 - toolbar_height) - (image_size.y * 2)) * multiplier;
break;
case CSS_BACKGROUND_POSITION_LENGTH:
y -= (int)(2. * css_len2px(&box->style->background_position.vert.value.length, box->style) * scale);
break;
default:
break;
}
}
else {
/* handle window offset */
x = xi;
y = yi;
/* handle background-position */
switch (box->style->background_position.horz.pos) {
case CSS_BACKGROUND_POSITION_PERCENT:
multiplier = box->style->background_position.horz.value.percent / 100;
x += 2 * (box->width + box->padding[LEFT] + box->padding[RIGHT] - image_size.x) * multiplier;
break;
case CSS_BACKGROUND_POSITION_LENGTH:
x += (int)(2. * css_len2px(&box->style->background_position.horz.value.length, box->style) * scale);
break;
default:
break;
}
switch (box->style->background_position.vert.pos) {
case CSS_BACKGROUND_POSITION_PERCENT:
multiplier = box->style->background_position.vert.value.percent / 100;
y -= 2 * (box->height + box->padding[TOP] + box->padding[BOTTOM] - image_size.y) * multiplier;
break;
case CSS_BACKGROUND_POSITION_LENGTH:
y -= (int)(2. * css_len2px(&box->style->background_position.vert.value.length, box->style) * scale);
break;
default:
break;
}
}
// LOG(("Body [%ld, %ld], Image: [%ld, %ld], Flags: %x", xi, yi, x, y, tinct_options));
/* convert our sizes into OS units */
// ro_convert_pixels_to_os_units(&image_size, (os_mode)-1);
image_width = image_size.x * 2;
image_height = image_size.y * 2;
/* and plot the image */
switch (box->background->type) {
#ifdef WITH_PNG
case CONTENT_PNG:
image_redraw(&box->background->bitmap->sprite_area,
x, y, image_width, image_height,
box->background->width * 2,
box->background->height * 2,
background_colour,
repeat_x, repeat_y, true,
((box->background->bitmap->opaque) ?
IMAGE_PLOT_TINCT_OPAQUE : IMAGE_PLOT_TINCT_ALPHA));
break;
#endif
#ifdef WITH_MNG
case CONTENT_JNG:
case CONTENT_MNG:
image_redraw(&box->background->bitmap->sprite_area,
x, y, image_width, image_height,
box->background->width * 2,
box->background->height * 2,
background_colour,
repeat_x, repeat_y, true,
((box->background->bitmap->opaque) ?
IMAGE_PLOT_TINCT_OPAQUE : IMAGE_PLOT_TINCT_ALPHA));
break;
#endif
#ifdef WITH_JPEG
case CONTENT_JPEG:
image_redraw(&box->background->bitmap->sprite_area,
x, y, image_width, image_height,
box->background->width * 2,
box->background->height * 2,
background_colour,
repeat_x, repeat_y, true,
IMAGE_PLOT_TINCT_OPAQUE);
break;
#endif
#ifdef WITH_GIF
case CONTENT_GIF:
image_redraw(&box->background->bitmap->sprite_area,
x, y, image_width, image_height,
box->background->width * 2,
box->background->height * 2,
background_colour,
repeat_x, repeat_y, true,
((box->background->bitmap->opaque) ?
IMAGE_PLOT_TINCT_OPAQUE : IMAGE_PLOT_TINCT_ALPHA));
break;
#endif
/**\todo Add draw/sprite background support? */
default:
break;
}
return true;
}
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