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-rw-r--r--frontends/riscos/plotters.c525
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diff --git a/frontends/riscos/plotters.c b/frontends/riscos/plotters.c
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+/*
+ * Copyright 2004 James Bursa <bursa@users.sourceforge.net>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ * Target independent plotting (RISC OS screen implementation).
+ */
+
+#include <stdbool.h>
+#include <math.h>
+#include "oslib/colourtrans.h"
+#include "oslib/draw.h"
+#include "oslib/os.h"
+
+#include "utils/log.h"
+#include "utils/utils.h"
+#include "desktop/plotters.h"
+
+#include "riscos/bitmap.h"
+#include "riscos/image.h"
+#include "riscos/gui.h"
+#include "riscos/font.h"
+#include "riscos/oslib_pre7.h"
+
+static bool ro_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style);
+static bool ro_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style);
+static bool ro_plot_draw_path(const draw_path * const path, int width,
+ colour c, bool dotted, bool dashed);
+static bool ro_plot_polygon(const int *p, unsigned int n, const plot_style_t *style);
+static bool ro_plot_path(const float *p, unsigned int n, colour fill, float width,
+ colour c, const float transform[6]);
+static bool ro_plot_clip(const struct rect *clip);
+static bool ro_plot_text(int x, int y, const char *text, size_t length,
+ const plot_font_style_t *fstyle);
+static bool ro_plot_disc(int x, int y, int radius, const plot_style_t *style);
+static bool ro_plot_arc(int x, int y, int radius, int angle1, int angle2,
+ const plot_style_t *style);
+static bool ro_plot_bitmap(int x, int y, int width, int height,
+ struct bitmap *bitmap, colour bg,
+ bitmap_flags_t flags);
+
+
+struct plotter_table plot;
+
+const struct plotter_table ro_plotters = {
+ .rectangle = ro_plot_rectangle,
+ .line = ro_plot_line,
+ .polygon = ro_plot_polygon,
+ .clip = ro_plot_clip,
+ .text = ro_plot_text,
+ .disc = ro_plot_disc,
+ .arc = ro_plot_arc,
+ .bitmap = ro_plot_bitmap,
+ .path = ro_plot_path,
+ .option_knockout = true,
+};
+
+int ro_plot_origin_x = 0;
+int ro_plot_origin_y = 0;
+
+/** One version of the A9home OS is incapable of drawing patterned lines */
+bool ro_plot_patterned_lines = true;
+
+
+
+bool ro_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
+{
+ if (style->fill_type != PLOT_OP_TYPE_NONE) {
+ os_error *error;
+ error = xcolourtrans_set_gcol(style->fill_colour << 8,
+ colourtrans_USE_ECFS_GCOL,
+ 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,
+ ro_plot_origin_x + x0 * 2,
+ ro_plot_origin_y - y0 * 2 - 1);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+
+ error = xos_plot(os_PLOT_RECTANGLE | os_PLOT_TO,
+ ro_plot_origin_x + x1 * 2 - 1,
+ ro_plot_origin_y - y1 * 2);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+ }
+
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+ bool dotted = false;
+ bool dashed = false;
+
+ const int path[] = { draw_MOVE_TO,
+ (ro_plot_origin_x + x0 * 2) * 256,
+ (ro_plot_origin_y - y0 * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + (x1) * 2) * 256,
+ (ro_plot_origin_y - y0 * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + (x1) * 2) * 256,
+ (ro_plot_origin_y - (y1) * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + x0 * 2) * 256,
+ (ro_plot_origin_y - (y1) * 2 - 1) * 256,
+ draw_CLOSE_LINE,
+ (ro_plot_origin_x + x0 * 2) * 256,
+ (ro_plot_origin_y - y0 * 2 - 1) * 256,
+ draw_END_PATH };
+
+ if (style->stroke_type == PLOT_OP_TYPE_DOT)
+ dotted = true;
+
+ if (style->stroke_type == PLOT_OP_TYPE_DASH)
+ dashed = true;
+
+ ro_plot_draw_path((const draw_path *)path,
+ style->stroke_width,
+ style->stroke_colour,
+ dotted, dashed);
+ }
+
+ return true;
+}
+
+
+bool ro_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
+{
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+ const int path[] = { draw_MOVE_TO,
+ (ro_plot_origin_x + x0 * 2) * 256,
+ (ro_plot_origin_y - y0 * 2 - 1) * 256,
+ draw_LINE_TO,
+ (ro_plot_origin_x + x1 * 2) * 256,
+ (ro_plot_origin_y - y1 * 2 - 1) * 256,
+ draw_END_PATH };
+ bool dotted = false;
+ bool dashed = false;
+
+ if (style->stroke_type == PLOT_OP_TYPE_DOT)
+ dotted = true;
+
+ if (style->stroke_type == PLOT_OP_TYPE_DASH)
+ dashed = true;
+
+ return ro_plot_draw_path((const draw_path *)path,
+ style->stroke_width,
+ style->stroke_colour,
+ dotted, dashed);
+ }
+ return true;
+}
+
+
+bool ro_plot_draw_path(const draw_path * const path, int width,
+ colour c, bool dotted, bool dashed)
+{
+ static const draw_line_style line_style = { draw_JOIN_MITRED,
+ draw_CAP_BUTT, draw_CAP_BUTT, 0, 0x7fffffff,
+ 0, 0, 0, 0 };
+ draw_dash_pattern dash = { 0, 1, { 512 } };
+ const draw_dash_pattern *dash_pattern = 0;
+ os_error *error;
+
+ if (width < 1)
+ width = 1;
+
+ if (ro_plot_patterned_lines) {
+ if (dotted) {
+ dash.elements[0] = 512 * width;
+ dash_pattern = &dash;
+ } else if (dashed) {
+ dash.elements[0] = 1536 * width;
+ dash_pattern = &dash;
+ }
+ }
+
+ error = xcolourtrans_set_gcol(c << 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(path, 0, 0, 0, width * 2 * 256,
+ &line_style, dash_pattern);
+ if (error) {
+ LOG("xdraw_stroke: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+
+ return true;
+}
+
+
+bool ro_plot_polygon(const int *p, unsigned int n, const plot_style_t *style)
+{
+ int path[n * 3 + 2];
+ unsigned int i;
+ os_error *error;
+
+ for (i = 0; i != n; i++) {
+ path[i * 3 + 0] = draw_LINE_TO;
+ path[i * 3 + 1] = (ro_plot_origin_x + p[i * 2 + 0] * 2) * 256;
+ path[i * 3 + 2] = (ro_plot_origin_y - p[i * 2 + 1] * 2) * 256;
+ }
+ path[0] = draw_MOVE_TO;
+ path[n * 3] = draw_END_PATH;
+ path[n * 3 + 1] = 0;
+
+ error = xcolourtrans_set_gcol(style->fill_colour << 8, 0, os_ACTION_OVERWRITE, 0, 0);
+ if (error) {
+ LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+ error = xdraw_fill((draw_path *) path, 0, 0, 0);
+ if (error) {
+ LOG("xdraw_fill: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+
+ return true;
+}
+
+
+bool ro_plot_path(const float *p, unsigned int n, colour fill, float width,
+ colour c, const float transform[6])
+{
+ static const draw_line_style line_style = { draw_JOIN_MITRED,
+ draw_CAP_BUTT, draw_CAP_BUTT, 0, 0x7fffffff,
+ 0, 0, 0, 0 };
+ int *path = 0;
+ unsigned int i;
+ os_trfm trfm;
+ os_error *error;
+
+ if (n == 0)
+ return true;
+
+ if (p[0] != PLOTTER_PATH_MOVE) {
+ LOG("path doesn't start with a move");
+ goto error;
+ }
+
+ path = malloc(sizeof *path * (n + 10));
+ if (!path) {
+ LOG("out of memory");
+ goto error;
+ }
+
+ for (i = 0; i < n; ) {
+ if (p[i] == PLOTTER_PATH_MOVE) {
+ path[i] = draw_MOVE_TO;
+ path[i + 1] = p[i + 1] * 2 * 256;
+ path[i + 2] = -p[i + 2] * 2 * 256;
+ i += 3;
+ } else if (p[i] == PLOTTER_PATH_CLOSE) {
+ path[i] = draw_CLOSE_LINE;
+ i++;
+ } else if (p[i] == PLOTTER_PATH_LINE) {
+ path[i] = draw_LINE_TO;
+ path[i + 1] = p[i + 1] * 2 * 256;
+ path[i + 2] = -p[i + 2] * 2 * 256;
+ i += 3;
+ } else if (p[i] == PLOTTER_PATH_BEZIER) {
+ path[i] = draw_BEZIER_TO;
+ path[i + 1] = p[i + 1] * 2 * 256;
+ path[i + 2] = -p[i + 2] * 2 * 256;
+ path[i + 3] = p[i + 3] * 2 * 256;
+ path[i + 4] = -p[i + 4] * 2 * 256;
+ path[i + 5] = p[i + 5] * 2 * 256;
+ path[i + 6] = -p[i + 6] * 2 * 256;
+ i += 7;
+ } else {
+ LOG("bad path command %f", p[i]);
+ goto error;
+ }
+ }
+ path[i] = draw_END_PATH;
+ path[i + 1] = 0;
+
+ trfm.entries[0][0] = transform[0] * 0x10000;
+ trfm.entries[0][1] = transform[1] * 0x10000;
+ trfm.entries[1][0] = transform[2] * 0x10000;
+ trfm.entries[1][1] = transform[3] * 0x10000;
+ trfm.entries[2][0] = (ro_plot_origin_x + transform[4] * 2) * 256;
+ trfm.entries[2][1] = (ro_plot_origin_y - transform[5] * 2) * 256;
+
+ if (fill != NS_TRANSPARENT) {
+ error = xcolourtrans_set_gcol(fill << 8, 0,
+ os_ACTION_OVERWRITE, 0, 0);
+ if (error) {
+ LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
+ goto error;
+ }
+
+ error = xdraw_fill((draw_path *) path, 0, &trfm, 0);
+ if (error) {
+ LOG("xdraw_stroke: 0x%x: %s", error->errnum, error->errmess);
+ goto error;
+ }
+ }
+
+ if (c != NS_TRANSPARENT) {
+ error = xcolourtrans_set_gcol(c << 8, 0,
+ os_ACTION_OVERWRITE, 0, 0);
+ if (error) {
+ LOG("xcolourtrans_set_gcol: 0x%x: %s", error->errnum, error->errmess);
+ goto error;
+ }
+
+ error = xdraw_stroke((draw_path *) path, 0, &trfm, 0,
+ width * 2 * 256, &line_style, 0);
+ if (error) {
+ LOG("xdraw_stroke: 0x%x: %s", error->errnum, error->errmess);
+ goto error;
+ }
+ }
+
+ free(path);
+ return true;
+
+error:
+ free(path);
+ return false;
+}
+
+
+
+
+bool ro_plot_clip(const struct rect *clip)
+{
+ os_error *error;
+ char buf[12];
+
+ int clip_x0 = ro_plot_origin_x + clip->x0 * 2;
+ int clip_y0 = ro_plot_origin_y - clip->y0 * 2 - 1;
+ int clip_x1 = ro_plot_origin_x + clip->x1 * 2 - 1;
+ int clip_y1 = ro_plot_origin_y - clip->y1 * 2;
+
+ if (clip_x1 < clip_x0 || clip_y0 < clip_y1) {
+ LOG("bad clip rectangle %i %i %i %i", clip_x0, clip_y0, clip_x1, clip_y1);
+ return false;
+ }
+
+ buf[0] = os_VDU_SET_GRAPHICS_WINDOW;
+ buf[1] = clip_x0;
+ buf[2] = clip_x0 >> 8;
+ buf[3] = clip_y1;
+ buf[4] = clip_y1 >> 8;
+ buf[5] = clip_x1;
+ buf[6] = clip_x1 >> 8;
+ buf[7] = clip_y0;
+ buf[8] = clip_y0 >> 8;
+
+ error = xos_writen(buf, 9);
+ if (error) {
+ LOG("xos_writen: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+
+ return true;
+}
+
+
+bool ro_plot_text(int x, int y, const char *text, size_t length,
+ const plot_font_style_t *fstyle)
+{
+ os_error *error;
+
+ error = xcolourtrans_set_font_colours(font_CURRENT,
+ fstyle->background << 8, fstyle->foreground << 8,
+ 14, 0, 0, 0);
+ if (error) {
+ LOG("xcolourtrans_set_font_colours: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+
+ return nsfont_paint(fstyle, text, length,
+ ro_plot_origin_x + x * 2,
+ ro_plot_origin_y - y * 2);
+}
+
+
+bool ro_plot_disc(int x, int y, int radius, const plot_style_t *style)
+{
+ os_error *error;
+ if (style->fill_type != PLOT_OP_TYPE_NONE) {
+ error = xcolourtrans_set_gcol(style->fill_colour << 8, 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,
+ ro_plot_origin_x + x * 2,
+ ro_plot_origin_y - y * 2);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+ error = xos_plot(os_PLOT_CIRCLE | os_PLOT_BY, radius * 2, 0);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+ }
+
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+
+ error = xcolourtrans_set_gcol(style->stroke_colour << 8, 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,
+ ro_plot_origin_x + x * 2,
+ ro_plot_origin_y - y * 2);
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+ error = xos_plot(os_PLOT_CIRCLE_OUTLINE | os_PLOT_BY,
+ radius * 2, 0);
+
+ if (error) {
+ LOG("xos_plot: 0x%x: %s", error->errnum, error->errmess);
+ return false;
+ }
+ }
+ return true;
+}
+
+bool ro_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *style)
+{
+ os_error *error;
+ int sx, sy, ex, ey;
+ double t;
+
+ x = ro_plot_origin_x + x * 2;
+ y = ro_plot_origin_y - y * 2;
+ radius <<= 1;
+
+ error = xcolourtrans_set_gcol(style->fill_colour << 8, 0,
+ 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 = riscos_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,
+ riscos_bitmap_get_opaque(bitmap) ? IMAGE_PLOT_TINCT_OPAQUE :
+ IMAGE_PLOT_TINCT_ALPHA);
+}