mirror of
https://github.com/netsurf-browser/netsurf
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553 lines
14 KiB
C
553 lines
14 KiB
C
/*
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* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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 <stdbool.h>
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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 "desktop/plotters.h"
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#include "render/font.h"
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#include "riscos/bitmap.h"
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#include "riscos/image.h"
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#include "riscos/gui.h"
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#include "riscos/oslib_pre7.h"
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#include "utils/log.h"
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static bool ro_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style);
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static bool ro_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style);
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static bool ro_plot_draw_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(const int *p, unsigned int n, const plot_style_t *style);
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static bool ro_plot_path(const float *p, unsigned int n, colour fill, float width,
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colour c, const float transform[6]);
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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, const char *text, size_t length,
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const plot_font_style_t *fstyle);
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static bool ro_plot_disc(int x, int y, int radius, const plot_style_t *style);
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static bool ro_plot_arc(int x, int y, int radius, int angle1, int angle2,
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const plot_style_t *style);
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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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bitmap_flags_t flags);
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struct plotter_table plot;
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const struct plotter_table ro_plotters = {
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.rectangle = ro_plot_rectangle,
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.line = ro_plot_line,
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.polygon = ro_plot_polygon,
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.clip = ro_plot_clip,
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.text = ro_plot_text,
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.disc = ro_plot_disc,
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.arc = ro_plot_arc,
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.bitmap = ro_plot_bitmap,
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.path = ro_plot_path,
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.option_knockout = true,
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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_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
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{
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os_error *error;
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if (style->fill_type != PLOT_OP_TYPE_NONE) {
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error = xcolourtrans_set_gcol(style->fill_colour << 8,
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colourtrans_USE_ECFS_GCOL,
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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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}
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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bool dotted = false;
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bool dashed = false;
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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 - 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_LINE_TO,
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(ro_plot_origin_x + x0 * 2) * 256,
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(ro_plot_origin_y - (y1) * 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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if (style->stroke_type == PLOT_OP_TYPE_DOT)
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dotted = true;
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if (style->stroke_type == PLOT_OP_TYPE_DASH)
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dashed = true;
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ro_plot_draw_path((const draw_path *)path,
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style->stroke_width,
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style->stroke_colour,
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dotted, dashed);
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}
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return true;
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}
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bool ro_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
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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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bool dotted = false;
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bool dashed = false;
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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if (style->stroke_type == PLOT_OP_TYPE_DOT)
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dotted = true;
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if (style->stroke_type == PLOT_OP_TYPE_DASH)
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dashed = true;
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return ro_plot_draw_path((const draw_path *)path,
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style->stroke_width,
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style->stroke_colour,
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dotted, dashed);
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}
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return true;
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}
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bool ro_plot_draw_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(const int *p, unsigned int n, const plot_style_t *style)
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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(style->fill_colour << 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_path(const float *p, unsigned int n, colour fill, float width,
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colour c, const float transform[6])
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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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int *path = 0;
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unsigned int i;
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os_trfm trfm;
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os_error *error;
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if (n == 0)
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return true;
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if (p[0] != PLOTTER_PATH_MOVE) {
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LOG(("path doesn't start with a move"));
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goto error;
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}
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path = malloc(sizeof *path * (n + 10));
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if (!path) {
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LOG(("out of memory"));
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goto error;
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}
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for (i = 0; i < n; ) {
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if (p[i] == PLOTTER_PATH_MOVE) {
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path[i] = draw_MOVE_TO;
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path[i + 1] = p[i + 1] * 2 * 256;
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path[i + 2] = -p[i + 2] * 2 * 256;
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i += 3;
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} else if (p[i] == PLOTTER_PATH_CLOSE) {
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path[i] = draw_CLOSE_LINE;
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i++;
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} else if (p[i] == PLOTTER_PATH_LINE) {
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path[i] = draw_LINE_TO;
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path[i + 1] = p[i + 1] * 2 * 256;
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path[i + 2] = -p[i + 2] * 2 * 256;
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i += 3;
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} else if (p[i] == PLOTTER_PATH_BEZIER) {
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path[i] = draw_BEZIER_TO;
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path[i + 1] = p[i + 1] * 2 * 256;
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path[i + 2] = -p[i + 2] * 2 * 256;
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path[i + 3] = p[i + 3] * 2 * 256;
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path[i + 4] = -p[i + 4] * 2 * 256;
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path[i + 5] = p[i + 5] * 2 * 256;
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path[i + 6] = -p[i + 6] * 2 * 256;
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i += 7;
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} else {
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LOG(("bad path command %f", p[i]));
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goto error;
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}
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}
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path[i] = draw_END_PATH;
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path[i + 1] = 0;
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trfm.entries[0][0] = transform[0] * 0x10000;
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trfm.entries[0][1] = transform[1] * 0x10000;
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trfm.entries[1][0] = transform[2] * 0x10000;
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trfm.entries[1][1] = transform[3] * 0x10000;
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trfm.entries[2][0] = (ro_plot_origin_x + transform[4] * 2) * 256;
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trfm.entries[2][1] = (ro_plot_origin_y - transform[5] * 2) * 256;
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if (fill != NS_TRANSPARENT) {
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error = xcolourtrans_set_gcol(fill << 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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goto error;
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}
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error = xdraw_fill((draw_path *) path, 0, &trfm, 0);
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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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goto error;
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}
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}
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if (c != NS_TRANSPARENT) {
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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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goto error;
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}
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error = xdraw_stroke((draw_path *) path, 0, &trfm, 0,
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width * 2 * 256, &line_style, 0);
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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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goto error;
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}
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}
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free(path);
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return true;
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error:
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free(path);
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return false;
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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, const char *text, size_t length,
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const plot_font_style_t *fstyle)
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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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fstyle->background << 8, fstyle->foreground << 8,
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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(fstyle, 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, const plot_style_t *style)
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{
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os_error *error;
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if (style->fill_type != PLOT_OP_TYPE_NONE) {
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error = xcolourtrans_set_gcol(style->fill_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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error = xos_plot(os_PLOT_CIRCLE | os_PLOT_BY, radius * 2, 0);
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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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}
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if (style->stroke_type != PLOT_OP_TYPE_NONE) {
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error = xcolourtrans_set_gcol(style->stroke_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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error = xos_plot(os_PLOT_CIRCLE_OUTLINE | os_PLOT_BY,
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radius * 2, 0);
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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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}
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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, const plot_style_t *style)
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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(style->fill_colour << 8, 0,
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|
os_ACTION_OVERWRITE, 0, 0);
|
|
|
|
if (error) {
|
|
LOG(("xcolourtrans_set_gcol: 0x%x: %s",
|
|
error->errnum, error->errmess));
|
|
return false;
|
|
}
|
|
|
|
t = ((double)angle1 * M_PI) / 180.0;
|
|
sx = (x + (int)(radius * cos(t)));
|
|
sy = (y + (int)(radius * sin(t)));
|
|
|
|
t = ((double)angle2 * M_PI) / 180.0;
|
|
ex = (x + (int)(radius * cos(t)));
|
|
ey = (y + (int)(radius * sin(t)));
|
|
|
|
error = xos_plot(os_MOVE_TO, x, y); /* move to centre */
|
|
if (error) {
|
|
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
|
|
return false;
|
|
}
|
|
|
|
error = xos_plot(os_MOVE_TO, sx, sy); /* move to start */
|
|
if (error) {
|
|
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
|
|
return false;
|
|
}
|
|
|
|
error = xos_plot(os_PLOT_ARC | os_PLOT_TO, ex, ey); /* arc to end */
|
|
if (error) {
|
|
LOG(("xos_plot: 0x%x: %s", error->errnum, error->errmess));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
bool ro_plot_bitmap(int x, int y, int width, int height,
|
|
struct bitmap *bitmap, colour bg,
|
|
bitmap_flags_t flags)
|
|
{
|
|
const uint8_t *buffer;
|
|
|
|
buffer = bitmap_get_buffer(bitmap);
|
|
if (!buffer) {
|
|
LOG(("bitmap_get_buffer failed"));
|
|
return false;
|
|
}
|
|
|
|
return image_redraw(bitmap->sprite_area,
|
|
ro_plot_origin_x + x * 2,
|
|
ro_plot_origin_y - y * 2,
|
|
width, height,
|
|
bitmap->width,
|
|
bitmap->height,
|
|
bg,
|
|
flags & BITMAPF_REPEAT_X, flags & BITMAPF_REPEAT_Y,
|
|
flags & BITMAPF_REPEAT_X || flags & BITMAPF_REPEAT_Y,
|
|
bitmap_get_opaque(bitmap) ? IMAGE_PLOT_TINCT_OPAQUE :
|
|
IMAGE_PLOT_TINCT_ALPHA);
|
|
}
|
|
|
|
/**
|
|
* Set the scale for subsequent text plotting.
|
|
*/
|
|
|
|
void ro_plot_set_scale(float scale)
|
|
{
|
|
ro_plot_scale = scale;
|
|
}
|