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netsurf/frontends/riscos/plotters.c
Vincent Sanders 667605869f move plotters header into public API
2016-05-30 21:05:57 +01:00

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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 "netsurf/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);
}
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