NetSurf
framebuffer.c
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1/*
2 * Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
3 *
4 * Framebuffer interface
5 *
6 * This file is part of NetSurf, http://www.netsurf-browser.org/
7 *
8 * NetSurf is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * NetSurf is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#include <stdio.h>
22#include <stdbool.h>
23#include <stdlib.h>
24#include <string.h>
25
26#include <libnsfb.h>
27#include <libnsfb_plot.h>
28#include <libnsfb_event.h>
29#include <libnsfb_cursor.h>
30
31#include "utils/utils.h"
32#include "utils/log.h"
33#include "utils/utf8.h"
35#include "netsurf/plotters.h"
36#include "netsurf/bitmap.h"
37
38#include "framebuffer/gui.h"
39#include "framebuffer/fbtk.h"
41#include "framebuffer/font.h"
42#include "framebuffer/bitmap.h"
43
44/* netsurf framebuffer library handle */
45static nsfb_t *nsfb;
46
47
48/**
49 * \brief Sets a clip rectangle for subsequent plot operations.
50 *
51 * \param ctx The current redraw context.
52 * \param clip The rectangle to limit all subsequent plot
53 * operations within.
54 * \return NSERROR_OK on success else error code.
55 */
56static nserror
57framebuffer_plot_clip(const struct redraw_context *ctx, const struct rect *clip)
58{
59 nsfb_bbox_t nsfb_clip;
60 nsfb_clip.x0 = clip->x0;
61 nsfb_clip.y0 = clip->y0;
62 nsfb_clip.x1 = clip->x1;
63 nsfb_clip.y1 = clip->y1;
64
65 if (!nsfb_plot_set_clip(nsfb, &nsfb_clip)) {
66 return NSERROR_INVALID;
67 }
68 return NSERROR_OK;
69}
70
71
72/**
73 * Plots an arc
74 *
75 * plot an arc segment around (x,y), anticlockwise from angle1
76 * to angle2. Angles are measured anticlockwise from
77 * horizontal, in degrees.
78 *
79 * \param ctx The current redraw context.
80 * \param style Style controlling the arc plot.
81 * \param x The x coordinate of the arc.
82 * \param y The y coordinate of the arc.
83 * \param radius The radius of the arc.
84 * \param angle1 The start angle of the arc.
85 * \param angle2 The finish angle of the arc.
86 * \return NSERROR_OK on success else error code.
87 */
88static nserror
90 const plot_style_t *style,
91 int x, int y, int radius, int angle1, int angle2)
92{
93 if (!nsfb_plot_arc(nsfb, x, y, radius, angle1, angle2, style->fill_colour)) {
94 return NSERROR_INVALID;
95 }
96 return NSERROR_OK;
97}
98
99
100/**
101 * Plots a circle
102 *
103 * Plot a circle centered on (x,y), which is optionally filled.
104 *
105 * \param ctx The current redraw context.
106 * \param style Style controlling the circle plot.
107 * \param x x coordinate of circle centre.
108 * \param y y coordinate of circle centre.
109 * \param radius circle radius.
110 * \return NSERROR_OK on success else error code.
111 */
112static nserror
114 const plot_style_t *style,
115 int x, int y, int radius)
116{
117 nsfb_bbox_t ellipse;
118 ellipse.x0 = x - radius;
119 ellipse.y0 = y - radius;
120 ellipse.x1 = x + radius;
121 ellipse.y1 = y + radius;
122
123 if (style->fill_type != PLOT_OP_TYPE_NONE) {
124 nsfb_plot_ellipse_fill(nsfb, &ellipse, style->fill_colour);
125 }
126
127 if (style->stroke_type != PLOT_OP_TYPE_NONE) {
128 nsfb_plot_ellipse(nsfb, &ellipse, style->stroke_colour);
129 }
130 return NSERROR_OK;
131}
132
133
134/**
135 * Plots a line
136 *
137 * plot a line from (x0,y0) to (x1,y1). Coordinates are at
138 * centre of line width/thickness.
139 *
140 * \param ctx The current redraw context.
141 * \param style Style controlling the line plot.
142 * \param line A rectangle defining the line to be drawn
143 * \return NSERROR_OK on success else error code.
144 */
145static nserror
147 const plot_style_t *style,
148 const struct rect *line)
149{
150 nsfb_bbox_t rect;
151 nsfb_plot_pen_t pen;
152
153 rect.x0 = line->x0;
154 rect.y0 = line->y0;
155 rect.x1 = line->x1;
156 rect.y1 = line->y1;
157
158 if (style->stroke_type != PLOT_OP_TYPE_NONE) {
159
160 if (style->stroke_type == PLOT_OP_TYPE_DOT) {
161 pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
162 pen.stroke_pattern = 0xAAAAAAAA;
163 } else if (style->stroke_type == PLOT_OP_TYPE_DASH) {
164 pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
165 pen.stroke_pattern = 0xF0F0F0F0;
166 } else {
167 pen.stroke_type = NFSB_PLOT_OPTYPE_SOLID;
168 }
169
170 pen.stroke_colour = style->stroke_colour;
171 pen.stroke_width = plot_style_fixed_to_int(style->stroke_width);
172 nsfb_plot_line(nsfb, &rect, &pen);
173 }
174
175 return NSERROR_OK;
176}
177
178
179/**
180 * Plots a rectangle.
181 *
182 * The rectangle can be filled an outline or both controlled
183 * by the plot style The line can be solid, dotted or
184 * dashed. Top left corner at (x0,y0) and rectangle has given
185 * width and height.
186 *
187 * \param ctx The current redraw context.
188 * \param style Style controlling the rectangle plot.
189 * \param nsrect A rectangle defining the line to be drawn
190 * \return NSERROR_OK on success else error code.
191 */
192static nserror
194 const plot_style_t *style,
195 const struct rect *nsrect)
196{
197 nsfb_bbox_t rect;
198 bool dotted = false;
199 bool dashed = false;
200
201 rect.x0 = nsrect->x0;
202 rect.y0 = nsrect->y0;
203 rect.x1 = nsrect->x1;
204 rect.y1 = nsrect->y1;
205
206 if (style->fill_type != PLOT_OP_TYPE_NONE) {
207 nsfb_plot_rectangle_fill(nsfb, &rect, style->fill_colour);
208 }
209
210 if (style->stroke_type != PLOT_OP_TYPE_NONE) {
211 if (style->stroke_type == PLOT_OP_TYPE_DOT) {
212 dotted = true;
213 }
214
215 if (style->stroke_type == PLOT_OP_TYPE_DASH) {
216 dashed = true;
217 }
218
219 nsfb_plot_rectangle(nsfb, &rect,
221 style->stroke_colour, dotted, dashed);
222 }
223 return NSERROR_OK;
224}
225
226
227/**
228 * Plot a polygon
229 *
230 * Plots a filled polygon with straight lines between
231 * points. The lines around the edge of the ploygon are not
232 * plotted. The polygon is filled with the non-zero winding
233 * rule.
234 *
235 * \param ctx The current redraw context.
236 * \param style Style controlling the polygon plot.
237 * \param p verticies of polygon
238 * \param n number of verticies.
239 * \return NSERROR_OK on success else error code.
240 */
241static nserror
243 const plot_style_t *style,
244 const int *p,
245 unsigned int n)
246{
247 if (!nsfb_plot_polygon(nsfb, p, n, style->fill_colour)) {
248 return NSERROR_INVALID;
249 }
250 return NSERROR_OK;
251}
252
253
254/**
255 * Plots a path.
256 *
257 * Path plot consisting of cubic Bezier curves. Line and fill colour is
258 * controlled by the plot style.
259 *
260 * \param ctx The current redraw context.
261 * \param pstyle Style controlling the path plot.
262 * \param p elements of path
263 * \param n nunber of elements on path
264 * \param transform A transform to apply to the path.
265 * \return NSERROR_OK on success else error code.
266 */
267static nserror
269 const plot_style_t *pstyle,
270 const float *p,
271 unsigned int n,
272 const float transform[6])
273{
274 NSLOG(netsurf, INFO, "path unimplemented");
275 return NSERROR_OK;
276}
277
278
279/**
280 * Plot a bitmap
281 *
282 * Tiled plot of a bitmap image. (x,y) gives the top left
283 * coordinate of an explicitly placed tile. From this tile the
284 * image can repeat in all four directions -- up, down, left
285 * and right -- to the extents given by the current clip
286 * rectangle.
287 *
288 * The bitmap_flags say whether to tile in the x and y
289 * directions. If not tiling in x or y directions, the single
290 * image is plotted. The width and height give the dimensions
291 * the image is to be scaled to.
292 *
293 * \param ctx The current redraw context.
294 * \param bitmap The bitmap to plot
295 * \param x The x coordinate to plot the bitmap
296 * \param y The y coordiante to plot the bitmap
297 * \param width The width of area to plot the bitmap into
298 * \param height The height of area to plot the bitmap into
299 * \param bg the background colour to alpha blend into
300 * \param flags the flags controlling the type of plot operation
301 * \return NSERROR_OK on success else error code.
302 */
303static nserror
305 struct bitmap *bitmap,
306 int x, int y,
307 int width,
308 int height,
309 colour bg,
310 bitmap_flags_t flags)
311{
312 nsfb_bbox_t loc;
313 nsfb_bbox_t clipbox;
314 bool repeat_x = (flags & BITMAPF_REPEAT_X);
315 bool repeat_y = (flags & BITMAPF_REPEAT_Y);
316 int bmwidth;
317 int bmheight;
318 int bmstride;
319 enum nsfb_format_e bmformat;
320 unsigned char *bmptr;
321 nsfb_t *bm = (nsfb_t *)bitmap;
322
323 /* x and y define coordinate of top left of of the initial explicitly
324 * placed tile. The width and height are the image scaling and the
325 * bounding box defines the extent of the repeat (which may go in all
326 * four directions from the initial tile).
327 */
328
329 if (!(repeat_x || repeat_y)) {
330 /* Not repeating at all, so just plot it */
331 loc.x0 = x;
332 loc.y0 = y;
333 loc.x1 = loc.x0 + width;
334 loc.y1 = loc.y0 + height;
335
336 if (!nsfb_plot_copy(bm, NULL, nsfb, &loc)) {
337 return NSERROR_INVALID;
338 }
339 return NSERROR_OK;
340 }
341
342 nsfb_plot_get_clip(nsfb, &clipbox);
343 nsfb_get_geometry(bm, &bmwidth, &bmheight, &bmformat);
344 nsfb_get_buffer(bm, &bmptr, &bmstride);
345
346 /* Optimise tiled plots of 1x1 bitmaps by replacing with a flat fill
347 * of the area. Can only be done when image is fully opaque. */
348 if ((bmwidth == 1) && (bmheight == 1)) {
349 if ((*(nsfb_colour_t *)bmptr & 0xff000000) != 0) {
350 if (!nsfb_plot_rectangle_fill(nsfb, &clipbox,
351 *(nsfb_colour_t *)bmptr)) {
352 return NSERROR_INVALID;
353 }
354 return NSERROR_OK;
355 }
356 }
357
358 /* Optimise tiled plots of bitmaps scaled to 1x1 by replacing with
359 * a flat fill of the area. Can only be done when image is fully
360 * opaque. */
361 if ((width == 1) && (height == 1)) {
363 /** TODO: Currently using top left pixel. Maybe centre
364 * pixel or average value would be better. */
365 if (!nsfb_plot_rectangle_fill(nsfb, &clipbox,
366 *(nsfb_colour_t *)bmptr)) {
367 return NSERROR_INVALID;
368 }
369 return NSERROR_OK;
370 }
371 }
372
373 /* get left most tile position */
374 if (repeat_x) {
375 for (; x > clipbox.x0; x -= width);
376 }
377
378 /* get top most tile position */
379 if (repeat_y) {
380 for (; y > clipbox.y0; y -= height);
381 }
382
383 /* set up top left tile location */
384 loc.x0 = x;
385 loc.y0 = y;
386 loc.x1 = loc.x0 + width;
387 loc.y1 = loc.y0 + height;
388
389 /* plot tiling across and down to extents */
390 nsfb_plot_bitmap_tiles(nsfb, &loc,
391 repeat_x ? ((clipbox.x1 - x) + width - 1) / width : 1,
392 repeat_y ? ((clipbox.y1 - y) + height - 1) / height : 1,
393 (nsfb_colour_t *)bmptr, bmwidth, bmheight,
394 bmstride * 8 / 32, bmformat == NSFB_FMT_ABGR8888);
395
396 return NSERROR_OK;
397}
398
399
400#ifdef FB_USE_FREETYPE
401/**
402 * Text plotting.
403 *
404 * \param ctx The current redraw context.
405 * \param fstyle plot style for this text
406 * \param x x coordinate
407 * \param y y coordinate
408 * \param text UTF-8 string to plot
409 * \param length length of string, in bytes
410 * \return NSERROR_OK on success else error code.
411 */
412static nserror
413framebuffer_plot_text(const struct redraw_context *ctx,
414 const struct plot_font_style *fstyle,
415 int x,
416 int y,
417 const char *text,
418 size_t length)
419{
420 uint32_t ucs4;
421 size_t nxtchr = 0;
422 FT_Glyph glyph;
423 FT_BitmapGlyph bglyph;
424 nsfb_bbox_t loc;
425
426 while (nxtchr < length) {
427 ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
428 nxtchr = utf8_next(text, length, nxtchr);
429
430 glyph = fb_getglyph(fstyle, ucs4);
431 if (glyph == NULL)
432 continue;
433
434 if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
435 bglyph = (FT_BitmapGlyph)glyph;
436
437 loc.x0 = x + bglyph->left;
438 loc.y0 = y - bglyph->top;
439 loc.x1 = loc.x0 + bglyph->bitmap.width;
440 loc.y1 = loc.y0 + bglyph->bitmap.rows;
441
442 /* now, draw to our target surface */
443 if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
444 nsfb_plot_glyph1(nsfb,
445 &loc,
446 bglyph->bitmap.buffer,
447 bglyph->bitmap.pitch,
448 fstyle->foreground);
449 } else {
450 nsfb_plot_glyph8(nsfb,
451 &loc,
452 bglyph->bitmap.buffer,
453 bglyph->bitmap.pitch,
454 fstyle->foreground);
455 }
456 }
457 x += glyph->advance.x >> 16;
458
459 }
460 return NSERROR_OK;
461
462}
463
464#else
465
466/**
467 * Text plotting.
468 *
469 * \param ctx The current redraw context.
470 * \param fstyle plot style for this text
471 * \param x x coordinate
472 * \param y y coordinate
473 * \param text UTF-8 string to plot
474 * \param length length of string, in bytes
475 * \return NSERROR_OK on success else error code.
476 */
477static nserror
479 const struct plot_font_style *fstyle,
480 int x,
481 int y,
482 const char *text,
483 size_t length)
484{
485 enum fb_font_style style = fb_get_font_style(fstyle);
486 int size = fb_get_font_size(fstyle);
487 const uint8_t *chrp;
488 size_t nxtchr = 0;
489 nsfb_bbox_t loc;
490 uint32_t ucs4;
491 int p = FB_FONT_PITCH * size;
492 int w = FB_FONT_WIDTH * size;
493 int h = FB_FONT_HEIGHT * size;
494
495 y -= ((h * 3) / 4);
496 /* the coord is the bottom-left of the pixels offset by 1 to make
497 * it work since fb coords are the top-left of pixels */
498 y += 1;
499
500 while (nxtchr < length) {
501 ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
502 nxtchr = utf8_next(text, length, nxtchr);
503
504 if (!codepoint_displayable(ucs4))
505 continue;
506
507 loc.x0 = x;
508 loc.y0 = y;
509 loc.x1 = loc.x0 + w;
510 loc.y1 = loc.y0 + h;
511
512 chrp = fb_get_glyph(ucs4, style, size);
513 nsfb_plot_glyph1(nsfb, &loc, chrp, p, fstyle->foreground);
514
515 x += w;
516
517 }
518
519 return NSERROR_OK;
520}
521#endif
522
523
524/** framebuffer plot operation table */
528 .disc = framebuffer_plot_disc,
529 .line = framebuffer_plot_line,
530 .rectangle = framebuffer_plot_rectangle,
531 .polygon = framebuffer_plot_polygon,
532 .path = framebuffer_plot_path,
533 .bitmap = framebuffer_plot_bitmap,
534 .text = framebuffer_plot_text,
535 .option_knockout = true,
536};
537
538
539static bool framebuffer_format_from_bpp(int bpp, enum nsfb_format_e *fmt)
540{
541 switch (bpp) {
542 case 32:
543 *fmt = NSFB_FMT_XRGB8888;
544 break;
545
546 case 24:
547 *fmt = NSFB_FMT_RGB888;
548 break;
549
550 case 16:
551 *fmt = NSFB_FMT_RGB565;
552 break;
553
554 case 8:
555 *fmt = NSFB_FMT_I8;
556 break;
557
558 case 4:
559 *fmt = NSFB_FMT_I4;
560 break;
561
562 case 1:
563 *fmt = NSFB_FMT_I1;
564 break;
565
566 default:
567 NSLOG(netsurf, INFO, "Bad bits per pixel (%d)\n", bpp);
568 return false;
569 }
570
571 return true;
572}
573
574
575
576nsfb_t *
577framebuffer_initialise(const char *fename, int width, int height, int bpp)
578{
579 enum nsfb_type_e fbtype;
580 enum nsfb_format_e fbfmt;
581
582 /* bpp is a proxy for the framebuffer format */
583 if (framebuffer_format_from_bpp(bpp, &fbfmt) == false) {
584 return NULL;
585 }
586
587 fbtype = nsfb_type_from_name(fename);
588 if (fbtype == NSFB_SURFACE_NONE) {
589 NSLOG(netsurf, INFO,
590 "The %s surface is not available from libnsfb\n", fename);
591 return NULL;
592 }
593
594 nsfb = nsfb_new(fbtype);
595 if (nsfb == NULL) {
596 NSLOG(netsurf, INFO, "Unable to create %s fb surface\n", fename);
597 return NULL;
598 }
599
600 if (nsfb_set_geometry(nsfb, width, height, fbfmt) == -1) {
601 NSLOG(netsurf, INFO, "Unable to set surface geometry\n");
602 nsfb_free(nsfb);
603 return NULL;
604 }
605
606 nsfb_cursor_init(nsfb);
607
608 if (nsfb_init(nsfb) == -1) {
609 NSLOG(netsurf, INFO, "Unable to initialise nsfb surface\n");
610 nsfb_free(nsfb);
611 return NULL;
612 }
613
614 return nsfb;
615
616}
617
618bool
619framebuffer_resize(nsfb_t *nsfb, int width, int height, int bpp)
620{
621 enum nsfb_format_e fbfmt;
622
623 /* bpp is a proxy for the framebuffer format */
624 if (framebuffer_format_from_bpp(bpp, &fbfmt) == false) {
625 return false;
626 }
627
628 if (nsfb_set_geometry(nsfb, width, height, fbfmt) == -1) {
629 NSLOG(netsurf, INFO, "Unable to change surface geometry\n");
630 return false;
631 }
632
633 return true;
634
635}
636
637void
639{
640 nsfb_free(nsfb);
641}
642
643bool
645{
646 return nsfb_cursor_set(nsfb, (nsfb_colour_t *)bm->pixdata, bm->width, bm->height, bm->width, bm->hot_x, bm->hot_y);
647}
648
649nsfb_t *framebuffer_set_surface(nsfb_t *new_nsfb)
650{
651 nsfb_t *old_nsfb;
652 old_nsfb = nsfb;
653 nsfb = new_nsfb;
654 return old_nsfb;
655}
Browser window creation and manipulation interface.
nserror
Enumeration of error codes.
Definition: errors.h:29
@ NSERROR_INVALID
Invalid data.
Definition: errors.h:49
@ NSERROR_OK
No error.
Definition: errors.h:30
FT_Glyph fb_getglyph(const plot_font_style_t *fstyle, uint32_t ucs4)
const uint8_t * fb_get_glyph(uint32_t ucs4, enum fb_font_style style, int scale)
int fb_get_font_size(const plot_font_style_t *fstyle)
enum fb_font_style fb_get_font_style(const plot_font_style_t *fstyle)
#define FB_FONT_PITCH
Definition: font_internal.h:31
fb_font_style
Definition: font_internal.h:33
#define FB_FONT_HEIGHT
Definition: font_internal.h:30
#define codepoint_displayable(u)
Definition: font_internal.h:43
#define FB_FONT_WIDTH
Definition: font_internal.h:29
static const char * fename
Definition: gui.c:463
static nserror framebuffer_plot_path(const struct redraw_context *ctx, const plot_style_t *pstyle, const float *p, unsigned int n, const float transform[6])
Plots a path.
Definition: framebuffer.c:268
nsfb_t * framebuffer_initialise(const char *fename, int width, int height, int bpp)
Definition: framebuffer.c:577
bool framebuffer_resize(nsfb_t *nsfb, int width, int height, int bpp)
Definition: framebuffer.c:619
static bool framebuffer_format_from_bpp(int bpp, enum nsfb_format_e *fmt)
Definition: framebuffer.c:539
static nserror framebuffer_plot_line(const struct redraw_context *ctx, const plot_style_t *style, const struct rect *line)
Plots a line.
Definition: framebuffer.c:146
const struct plotter_table fb_plotters
framebuffer plot operation table
Definition: framebuffer.c:525
static nserror framebuffer_plot_bitmap(const struct redraw_context *ctx, struct bitmap *bitmap, int x, int y, int width, int height, colour bg, bitmap_flags_t flags)
Plot a bitmap.
Definition: framebuffer.c:304
static nsfb_t * nsfb
Definition: framebuffer.c:45
nsfb_t * framebuffer_set_surface(nsfb_t *new_nsfb)
Set framebuffer surface to render into.
Definition: framebuffer.c:649
static nserror framebuffer_plot_polygon(const struct redraw_context *ctx, const plot_style_t *style, const int *p, unsigned int n)
Plot a polygon.
Definition: framebuffer.c:242
static nserror framebuffer_plot_text(const struct redraw_context *ctx, const struct plot_font_style *fstyle, int x, int y, const char *text, size_t length)
Text plotting.
Definition: framebuffer.c:478
static nserror framebuffer_plot_arc(const struct redraw_context *ctx, const plot_style_t *style, int x, int y, int radius, int angle1, int angle2)
Plots an arc.
Definition: framebuffer.c:89
static nserror framebuffer_plot_clip(const struct redraw_context *ctx, const struct rect *clip)
Sets a clip rectangle for subsequent plot operations.
Definition: framebuffer.c:57
static nserror framebuffer_plot_rectangle(const struct redraw_context *ctx, const plot_style_t *style, const struct rect *nsrect)
Plots a rectangle.
Definition: framebuffer.c:193
void framebuffer_finalise(void)
Definition: framebuffer.c:638
bool framebuffer_set_cursor(struct fbtk_bitmap *bm)
Definition: framebuffer.c:644
static nserror framebuffer_plot_disc(const struct redraw_context *ctx, const plot_style_t *style, int x, int y, int radius)
Plots a circle.
Definition: framebuffer.c:113
framebuffer interface.
bool framebuffer_bitmap_get_opaque(void *bitmap)
Gets weather a bitmap should be plotted opaque.
Definition: bitmap.c:163
Generic bitmap handling interface.
Target independent plotting interface.
#define BITMAPF_REPEAT_X
Definition: plotters.h:38
#define BITMAPF_REPEAT_Y
Definition: plotters.h:39
unsigned long bitmap_flags_t
Definition: plotters.h:36
#define NSLOG(catname, level, logmsg, args...)
Definition: log.h:116
#define plot_style_fixed_to_int(v)
Definition: plot_style.h:54
@ PLOT_OP_TYPE_NONE
No operation.
Definition: plot_style.h:66
@ PLOT_OP_TYPE_DASH
Dashed plot.
Definition: plot_style.h:69
@ PLOT_OP_TYPE_DOT
Dotted plot.
Definition: plot_style.h:68
int width
Definition: gui.c:160
int height
Definition: gui.c:161
Interface to utility string handling.
RISC OS wimp toolkit bitmap.
Definition: bitmap.c:68
framebuffer toolkit bitmaps
Definition: fbtk.h:63
uint8_t * pixdata
Definition: fbtk.h:66
int hot_y
Definition: fbtk.h:71
int hot_x
Definition: fbtk.h:70
int height
Definition: fbtk.h:65
int width
Definition: fbtk.h:64
Font style for plotting.
Definition: plot_style.h:111
colour foreground
Colour of text.
Definition: plot_style.h:123
Plot style for stroke/fill plotters.
Definition: plot_style.h:76
colour fill_colour
Colour of fill.
Definition: plot_style.h:81
plot_style_fixed stroke_width
Width of stroke, in pixels.
Definition: plot_style.h:78
plot_operation_type_t fill_type
Fill plot type.
Definition: plot_style.h:80
colour stroke_colour
Colour of stroke.
Definition: plot_style.h:79
plot_operation_type_t stroke_type
Stroke plot type.
Definition: plot_style.h:77
Plotter operations table.
Definition: plotters.h:102
nserror(* clip)(const struct redraw_context *ctx, const struct rect *clip)
Sets a clip rectangle for subsequent plot operations.
Definition: plotters.h:111
Rectangle coordinates.
Definition: types.h:40
int x0
Definition: types.h:41
int y0
Top left.
Definition: types.h:41
int x1
Definition: types.h:42
int y1
Bottom right.
Definition: types.h:42
Redraw context.
Definition: plotters.h:51
uint32_t colour
Colour type: XBGR.
Definition: types.h:35
struct rect rect
Rectangle coordinates.
uint32_t utf8_to_ucs4(const char *s_in, size_t l)
Convert a UTF-8 multibyte sequence into a single UCS4 character.
Definition: utf8.c:41
size_t utf8_next(const char *s, size_t l, size_t o)
Find next legal UTF-8 char in string.
Definition: utf8.c:129
UTF-8 manipulation functions (interface).
Interface to a number of general purpose functionality.
static nserror line(const struct redraw_context *ctx, const plot_style_t *style, const struct rect *line)
Plots a line.
Definition: plot.c:579
static nserror text(const struct redraw_context *ctx, const struct plot_font_style *fstyle, int x, int y, const char *text, size_t length)
Text plotting.
Definition: plot.c:978
static nserror clip(const struct redraw_context *ctx, const struct rect *clip)
Sets a clip rectangle for subsequent plot operations.
Definition: plot.c:357