mirror of
https://github.com/netsurf-browser/netsurf
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420 lines
10 KiB
C
420 lines
10 KiB
C
/*
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* This file is part of NetSurf, http://netsurf-browser.org/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
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*/
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/** \file
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* Target independent plotting (RISC OS screen implementation).
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*/
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#include <math.h>
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#include "oslib/colourtrans.h"
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#include "oslib/draw.h"
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#include "oslib/os.h"
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#include "netsurf/desktop/plotters.h"
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#include "netsurf/render/font.h"
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#include "netsurf/riscos/bitmap.h"
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#include "netsurf/riscos/image.h"
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#include "netsurf/riscos/gui.h"
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#include "netsurf/utils/log.h"
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static bool ro_plot_clg(colour c);
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static bool ro_plot_rectangle(int x0, int y0, int width, int height,
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int line_width, colour c, bool dotted, bool dashed);
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static bool ro_plot_line(int x0, int y0, int x1, int y1, int width,
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colour c, bool dotted, bool dashed);
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static bool ro_plot_path(const draw_path * const path, int width,
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colour c, bool dotted, bool dashed);
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static bool ro_plot_polygon(int *p, unsigned int n, colour fill);
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static bool ro_plot_fill(int x0, int y0, int x1, int y1, colour c);
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static bool ro_plot_clip(int clip_x0, int clip_y0,
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int clip_x1, int clip_y1);
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static bool ro_plot_text(int x, int y, struct css_style *style,
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const char *text, size_t length, colour bg, colour c);
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static bool ro_plot_disc(int x, int y, int radius, colour colour, bool filled);
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static bool ro_plot_arc(int x, int y, int radius, int angle1, int angle2,
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colour c);
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static bool ro_plot_bitmap(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg);
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static bool ro_plot_bitmap_tile(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg,
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bool repeat_x, bool repeat_y);
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struct plotter_table plot;
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const struct plotter_table ro_plotters = {
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ro_plot_clg,
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ro_plot_rectangle,
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ro_plot_line,
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ro_plot_polygon,
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ro_plot_fill,
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ro_plot_clip,
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ro_plot_text,
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ro_plot_disc,
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ro_plot_arc,
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ro_plot_bitmap,
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ro_plot_bitmap_tile,
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NULL,
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NULL,
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NULL
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};
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int ro_plot_origin_x = 0;
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int ro_plot_origin_y = 0;
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float ro_plot_scale = 1.0;
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/** One version of the A9home OS is incapable of drawing patterned lines */
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bool ro_plot_patterned_lines = true;
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bool ro_plot_clg(colour c)
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{
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os_error *error;
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error = xcolourtrans_set_gcol(c << 8,
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colourtrans_SET_BG | colourtrans_USE_ECFS,
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os_ACTION_OVERWRITE, 0, 0);
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if (error) {
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LOG(("xcolourtrans_set_gcol: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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error = xos_clg();
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if (error) {
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LOG(("xos_clg: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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return true;
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}
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bool ro_plot_rectangle(int x0, int y0, int width, int height,
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int line_width, colour c, bool dotted, bool dashed)
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{
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const int path[] = { draw_MOVE_TO,
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(ro_plot_origin_x + x0 * 2) * 256,
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(ro_plot_origin_y - y0 * 2 - 1) * 256,
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draw_LINE_TO,
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(ro_plot_origin_x + (x0 + width) * 2) * 256,
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(ro_plot_origin_y - y0 * 2 - 1) * 256,
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draw_LINE_TO,
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(ro_plot_origin_x + (x0 + width) * 2) * 256,
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(ro_plot_origin_y - (y0 + height) * 2 - 1) * 256,
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draw_LINE_TO,
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(ro_plot_origin_x + x0 * 2) * 256,
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(ro_plot_origin_y - (y0 + height) * 2 - 1) * 256,
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draw_CLOSE_LINE,
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(ro_plot_origin_x + x0 * 2) * 256,
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(ro_plot_origin_y - y0 * 2 - 1) * 256,
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draw_END_PATH };
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return ro_plot_path((const draw_path *) path, line_width, c,
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dotted, dashed);
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}
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bool ro_plot_line(int x0, int y0, int x1, int y1, int width,
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colour c, bool dotted, bool dashed)
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{
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const int path[] = { draw_MOVE_TO,
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(ro_plot_origin_x + x0 * 2) * 256,
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(ro_plot_origin_y - y0 * 2 - 1) * 256,
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draw_LINE_TO,
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(ro_plot_origin_x + x1 * 2) * 256,
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(ro_plot_origin_y - y1 * 2 - 1) * 256,
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draw_END_PATH };
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return ro_plot_path((const draw_path *) path, width, c, dotted, dashed);
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}
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bool ro_plot_path(const draw_path * const path, int width,
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colour c, bool dotted, bool dashed)
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{
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static const draw_line_style line_style = { draw_JOIN_MITRED,
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draw_CAP_BUTT, draw_CAP_BUTT, 0, 0x7fffffff,
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0, 0, 0, 0 };
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draw_dash_pattern dash = { 0, 1, { 512 } };
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const draw_dash_pattern *dash_pattern = 0;
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os_error *error;
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if (width < 1)
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width = 1;
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if (ro_plot_patterned_lines) {
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if (dotted) {
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dash.elements[0] = 512 * width;
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dash_pattern = ‐
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} else if (dashed) {
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dash.elements[0] = 1536 * width;
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dash_pattern = ‐
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}
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}
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error = xcolourtrans_set_gcol(c << 8, 0, os_ACTION_OVERWRITE, 0, 0);
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if (error) {
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LOG(("xcolourtrans_set_gcol: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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error = xdraw_stroke(path, 0, 0, 0, width * 2 * 256,
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&line_style, dash_pattern);
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if (error) {
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LOG(("xdraw_stroke: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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return true;
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}
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bool ro_plot_polygon(int *p, unsigned int n, colour fill)
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{
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int path[n * 3 + 2];
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unsigned int i;
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os_error *error;
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for (i = 0; i != n; i++) {
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path[i * 3 + 0] = draw_LINE_TO;
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path[i * 3 + 1] = (ro_plot_origin_x + p[i * 2 + 0] * 2) * 256;
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path[i * 3 + 2] = (ro_plot_origin_y - p[i * 2 + 1] * 2) * 256;
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}
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path[0] = draw_MOVE_TO;
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path[n * 3] = draw_END_PATH;
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path[n * 3 + 1] = 0;
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error = xcolourtrans_set_gcol(fill << 8, 0, os_ACTION_OVERWRITE, 0, 0);
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if (error) {
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LOG(("xcolourtrans_set_gcol: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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error = xdraw_fill((draw_path *) path, 0, 0, 0);
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if (error) {
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LOG(("xdraw_fill: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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return true;
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}
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bool ro_plot_fill(int x0, int y0, int x1, int y1, colour c)
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{
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os_error *error;
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error = xcolourtrans_set_gcol(c << 8, colourtrans_USE_ECFS,
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os_ACTION_OVERWRITE, 0, 0);
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if (error) {
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LOG(("xcolourtrans_set_gcol: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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error = xos_plot(os_MOVE_TO,
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ro_plot_origin_x + x0 * 2,
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ro_plot_origin_y - y0 * 2 - 1);
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if (error) {
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LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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error = xos_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
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ro_plot_origin_x + x1 * 2 - 1,
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ro_plot_origin_y - y1 * 2);
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if (error) {
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LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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return true;
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}
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bool ro_plot_clip(int clip_x0, int clip_y0,
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int clip_x1, int clip_y1)
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{
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os_error *error;
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char buf[12];
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clip_x0 = ro_plot_origin_x + clip_x0 * 2;
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clip_y0 = ro_plot_origin_y - clip_y0 * 2 - 1;
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clip_x1 = ro_plot_origin_x + clip_x1 * 2 - 1;
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clip_y1 = ro_plot_origin_y - clip_y1 * 2;
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if (clip_x1 < clip_x0 || clip_y0 < clip_y1) {
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LOG(("bad clip rectangle %i %i %i %i",
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clip_x0, clip_y0, clip_x1, clip_y1));
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return false;
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}
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buf[0] = os_VDU_SET_GRAPHICS_WINDOW;
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buf[1] = clip_x0;
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buf[2] = clip_x0 >> 8;
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buf[3] = clip_y1;
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buf[4] = clip_y1 >> 8;
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buf[5] = clip_x1;
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buf[6] = clip_x1 >> 8;
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buf[7] = clip_y0;
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buf[8] = clip_y0 >> 8;
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error = xos_writen(buf, 9);
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if (error) {
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LOG(("xos_writen: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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return true;
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}
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bool ro_plot_text(int x, int y, struct css_style *style,
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const char *text, size_t length, colour bg, colour c)
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{
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os_error *error;
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error = xcolourtrans_set_font_colours(font_CURRENT,
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bg << 8, c << 8, 14, 0, 0, 0);
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if (error) {
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LOG(("xcolourtrans_set_font_colours: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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return nsfont_paint(style, text, length,
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ro_plot_origin_x + x * 2,
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ro_plot_origin_y - y * 2,
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ro_plot_scale);
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}
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bool ro_plot_disc(int x, int y, int radius, colour colour, bool filled)
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{
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os_error *error;
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error = xcolourtrans_set_gcol(colour << 8, 0,
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os_ACTION_OVERWRITE, 0, 0);
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if (error) {
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LOG(("xcolourtrans_set_gcol: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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error = xos_plot(os_MOVE_TO,
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ro_plot_origin_x + x * 2,
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ro_plot_origin_y - y * 2);
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if (error) {
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LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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if (filled) {
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error = xos_plot(os_PLOT_CIRCLE | os_PLOT_BY, radius * 2, 0);
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} else {
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error = xos_plot(os_PLOT_CIRCLE_OUTLINE | os_PLOT_BY,
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radius * 2, 0);
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}
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if (error) {
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LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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return true;
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}
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bool ro_plot_arc(int x, int y, int radius, int angle1, int angle2, colour c)
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{
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os_error *error;
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int sx, sy, ex, ey;
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double t;
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x = ro_plot_origin_x + x * 2;
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y = ro_plot_origin_y - y * 2;
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radius <<= 1;
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error = xcolourtrans_set_gcol(c << 8, 0,
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os_ACTION_OVERWRITE, 0, 0);
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if (error) {
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LOG(("xcolourtrans_set_gcol: 0x%x: %s",
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error->errnum, error->errmess));
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return false;
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}
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t = ((double)angle1 * M_PI) / 180.0;
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sx = (x + (int)(radius * cos(t)));
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sy = (y + (int)(radius * sin(t)));
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t = ((double)angle2 * M_PI) / 180.0;
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ex = (x + (int)(radius * cos(t)));
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ey = (y + (int)(radius * sin(t)));
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error = xos_plot(os_MOVE_TO, x, y); /* move to centre */
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if (error) {
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LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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error = xos_plot(os_MOVE_TO, sx, sy); /* move to start */
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if (error) {
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LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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error = xos_plot(os_PLOT_ARC | os_PLOT_TO, ex, ey); /* arc to end */
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if (error) {
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LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
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return false;
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}
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return true;
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}
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bool ro_plot_bitmap(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg)
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{
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bitmap_get_buffer(bitmap);
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return image_redraw(bitmap->sprite_area,
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ro_plot_origin_x + x * 2,
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ro_plot_origin_y - y * 2,
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width, height,
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bitmap->width,
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bitmap->height,
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bg,
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false, false, false,
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bitmap_get_opaque(bitmap) ? IMAGE_PLOT_TINCT_OPAQUE :
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IMAGE_PLOT_TINCT_ALPHA);
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}
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bool ro_plot_bitmap_tile(int x, int y, int width, int height,
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struct bitmap *bitmap, colour bg,
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bool repeat_x, bool repeat_y)
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{
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bitmap_get_buffer(bitmap);
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return image_redraw(bitmap->sprite_area,
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ro_plot_origin_x + x * 2,
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ro_plot_origin_y - y * 2,
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width, height,
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bitmap->width,
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bitmap->height,
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bg,
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repeat_x, repeat_y, true,
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bitmap_get_opaque(bitmap) ? IMAGE_PLOT_TINCT_OPAQUE :
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IMAGE_PLOT_TINCT_ALPHA);
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}
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/**
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* Set the scale for subsequent text plotting.
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*/
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void ro_plot_set_scale(float scale)
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{
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ro_plot_scale = scale;
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}
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