summaryrefslogtreecommitdiff
path: root/framebuffer/fb_16bpp_plotters.c
blob: b97c42da5f432bb085fa332d1afd693db9c56af7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
/*
 * Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
 *
 * 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/>.
 */

#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include <limits.h>

#include "utils/log.h"
#include "utils/utf8.h"
#include "desktop/plotters.h"

#include "framebuffer/fb_gui.h"
#include "framebuffer/fb_plotters.h"
#include "framebuffer/fb_bitmap.h"
#include "framebuffer/fb_font.h"

static inline uint16_t *
fb_16bpp_get_xy_loc(int x, int y)
{
        return (void *)(framebuffer->ptr +
                            (y * framebuffer->linelen) +
                            (x << 1));
}

static inline colour fb_16bpp_to_colour(uint16_t pixel)
{
        return ((pixel & 0x1F) << 19) |
              ((pixel & 0x7E0) << 5) |
              ((pixel & 0xF800) >> 8);
}

/* convert a colour value to a 16bpp pixel value ready for screen output */
static inline uint16_t fb_colour_to_pixel(colour c)
{
        return ((c & 0xF8) << 8) | ((c & 0xFC00 ) >> 5) | ((c & 0xF80000) >> 19);
}

#define SIGN(x)  ((x<0) ?  -1  :  ((x>0) ? 1 : 0))

static bool fb_16bpp_line(int x0, int y0, int x1, int y1, int width,
			colour c, bool dotted, bool dashed)
{
        int w;
        uint16_t ent;
        uint16_t *pvideo;

        int x, y, i;
        int dx, dy, sdy;
        int dxabs, dyabs;

        /*LOG(("%d, %d, %d, %d, %d, 0x%lx, %d, %d",
	  x0,y0,x1,y1,width,c,dotted,dashed));*/

        if (y1 > fb_plot_ctx.y1)
                return true;
        if (y0 < fb_plot_ctx.y0)
                return true;

        ent = fb_colour_to_pixel(c);

        if (y0 == y1) {
                /* horizontal line special cased */
                if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
			return true; /* line outside clipping */

                /*LOG(("horiz: %d, %d, %d, %d, %d, 0x%lx, %d, %d",
		  x0,y0,x1,y1,width,c,dotted,dashed));*/

                pvideo = fb_16bpp_get_xy_loc(x0, y0);

                w = x1 - x0;
                while (w-- > 0) {
                        *(pvideo + w) = ent;
                }
                return true;
        } else {
                /* standard bresenham line */
                if (!fb_plotters_clip_line_ctx(&x0, &y0, &x1, &y1))
                        return true; /* line outside clipping */

                //LOG(("%d, %d, %d, %d", x0,y0,x1,y1));

                /* the horizontal distance of the line */
                dx = x1 - x0;
                dxabs = abs (dx);

                /* the vertical distance of the line */
                dy = y1 - y0;
                dyabs = abs (dy);

                sdy = dx ? SIGN(dy) * SIGN(dx) : SIGN(dy);

                if (dx >= 0)
                        pvideo = fb_16bpp_get_xy_loc(x0, y0);
                else
                        pvideo = fb_16bpp_get_xy_loc(x1, y1);

                x = dyabs >> 1;
                y = dxabs >> 1;

                if (dxabs >= dyabs) {
                        /* the line is more horizontal than vertical */
                        for (i = 0; i <= dxabs; i++) {
                                *pvideo = ent;

                                pvideo++;
                                y += dyabs;
                                if (y > dxabs) {
                                        y -= dxabs;
                                        pvideo += sdy * (framebuffer->linelen>>1);
                                }
                        }
                } else {
                        /* the line is more vertical than horizontal */
                        for (i = 0; i <= dyabs; i++) {
                                *pvideo = ent;
                                pvideo += sdy * (framebuffer->linelen >> 1);

                                x += dxabs;
                                if (x > dyabs) {
                                        x -= dyabs;
                                        pvideo++;
                                }
                        }
                }

        }



	return true;
}

static bool fb_16bpp_rectangle(int x0, int y0, int width, int height,
			int line_width, colour c, bool dotted, bool dashed)
{
        fb_16bpp_line(x0, y0, x0 + width, y0, line_width, c, dotted, dashed);
        fb_16bpp_line(x0, y0 + height, x0 + width, y0 + height, line_width, c, dotted, dashed);
        fb_16bpp_line(x0, y0, x0, y0 + height, line_width, c, dotted, dashed);
        fb_16bpp_line(x0 + width, y0, x0 + width, y0 + height, line_width, c, dotted, dashed);
	return true;
}

static bool fb_16bpp_polygon(const int *p, unsigned int n, colour fill)
{
        return fb_plotters_polygon(p, n, fill, fb_16bpp_line);
}


static bool fb_16bpp_fill(int x0, int y0, int x1, int y1, colour c)
{
        int w;
        uint16_t *pvid16;
        uint16_t ent16;
        uint32_t *pvid32;
        uint32_t ent32;
        uint32_t llen;
        uint32_t width;
        uint32_t height;

        if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
                return true; /* fill lies outside current clipping region */

        ent16 = fb_colour_to_pixel(c);
        width = x1 - x0;
        height = y1 - y0;

        pvid16 = fb_16bpp_get_xy_loc(x0, y0);

        if (((x0 & 1) == 0) && ((width & 1) == 0)) {
                /* aligned to 32bit value and width is even */
                width = width >> 1;
                llen = (framebuffer->linelen >> 2) - width;
                ent32 = ent16 | (ent16 << 16);
                pvid32 = (uint32_t *)pvid16;

                while (height-- > 0) {
                        w = width;
                        while (w >= 16) {
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                w-=16;
                        }
                        while (w >= 4) {
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                *pvid32++ = ent32; *pvid32++ = ent32;
                                w-=4;
                        }
                        while (w > 0) {
                                *pvid32++ = ent32;
                                w--;
                        }
                        // for (w = width; w > 0; w--) *pvid32++ = ent32;
                        pvid32 += llen;
                }

        } else {
                llen = (framebuffer->linelen >> 1) - width;


                while (height-- > 0) {
                        for (w = width; w > 0; w--) *pvid16++ = ent16;
                        pvid16 += llen;
                }
        }
	return true;
}

static bool fb_16bpp_clg(colour c)
{
        /* LOG(("c %lx", c)); */
        fb_16bpp_fill(fb_plot_ctx.x0,
                         fb_plot_ctx.y0,
                         fb_plot_ctx.x1,
                         fb_plot_ctx.y1,
                         c);
	return true;
}

#ifdef FB_USE_FREETYPE

static bool
fb_16bpp_draw_ft_monobitmap(FT_Bitmap *bp, int x, int y, colour c)
{
        return false;
}

static bool
fb_16bpp_draw_ft_bitmap(FT_Bitmap *bp, int x, int y, colour c)
{
        uint16_t *pvideo;
        uint8_t *pixel = (uint8_t *)bp->buffer;
        colour abpixel; /* alphablended pixel */
        int xloop, yloop;
        int x0,y0,x1,y1;
	int xoff, yoff; /* x and y offset into image */
        int height = bp->rows;
        int width = bp->width;
        uint32_t fgcol;

        /* The part of the scaled image actually displayed is cropped to the
         * current context.
         */
        x0 = x;
        y0 = y;
        x1 = x + width;
        y1 = y + height;

        if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
                return true;

        if (height > (y1 - y0))
                height = (y1 - y0);

        if (width > (x1 - x0))
                width = (x1 - x0);

	xoff = x0 - x;
	yoff = y0 - y;

        /* plot the image */
        pvideo = fb_16bpp_get_xy_loc(x0, y0);

        fgcol = c & 0xFFFFFF;

        for (yloop = 0; yloop < height; yloop++) {
                for (xloop = 0; xloop < width; xloop++) {
                        abpixel = (pixel[((yoff + yloop) * bp->pitch) + xloop + xoff] << 24) | fgcol;
                        if ((abpixel & 0xFF000000) != 0) {
                                if ((abpixel & 0xFF000000) != 0xFF000000) {
                                        abpixel = fb_plotters_ablend(abpixel,
                                         fb_16bpp_to_colour(*(pvideo + xloop)));
                                }

                                *(pvideo + xloop) = fb_colour_to_pixel(abpixel);

                        }
                }
                pvideo += (framebuffer->linelen >> 1);
        }

	return true;
}

static bool fb_16bpp_text(int x, int y, const struct css_style *style,
			const char *text, size_t length, colour bg, colour c)
{
        uint32_t ucs4;
        size_t nxtchr = 0;
        FT_Glyph glyph;
        FT_BitmapGlyph bglyph;

        while (nxtchr < length) {
                ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
                nxtchr = utf8_next(text, length, nxtchr);

                glyph = fb_getglyph(style, ucs4);
                if (glyph == NULL)
                        continue;
                if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
                        bglyph = (FT_BitmapGlyph)glyph;

                        /* now, draw to our target surface */
                        if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
                                fb_16bpp_draw_ft_monobitmap(&bglyph->bitmap,
                                                            x + bglyph->left,
                                                            y - bglyph->top,
                                                            c);
                        } else {
                                fb_16bpp_draw_ft_bitmap(&bglyph->bitmap,
                                                        x + bglyph->left,
                                                        y - bglyph->top,
                                                        c);
                        }
                }
                x += glyph->advance.x >> 16;

        }
        return true;
}

#else
static bool fb_16bpp_text(int x, int y, const struct css_style *style,
			const char *text, size_t length, colour bg, colour c)
{
        const struct fb_font_desc* fb_font = fb_get_font(style);
        const uint32_t *font_data;
        int xloop, yloop;
        uint32_t row;
        size_t chr;

        uint16_t *pvideo;
        uint16_t fgcol;
        uint16_t bgcol;

	unsigned char *buffer = NULL;
        int x0,y0,x1,y1;
	int xoff, yoff; /* x and y offset into image */
        int height = fb_font->height;

        /* aquire thge text in local font encoding */
	utf8_to_font_encoding(fb_font, text, length, (char **)&buffer);
	if (!buffer)
                return true;
        length = strlen((char *)buffer);


        /* y is given to the fonts baseline we need it to the fonts top */
        y-=((fb_font->height * 75)/100);

        y+=1; /* the coord is the bottom-left of the pixels offset by 1 to make
               *   it work since fb coords are the top-left of pixels
               */

        /* The part of the text displayed is cropped to the current context. */
        x0 = x;
        y0 = y;
        x1 = x + (fb_font->width * length);
        y1 = y + fb_font->height;

        if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
                return true; /* text lies outside current clipping region */

        /* find width and height to plot */
        if (height > (y1 - y0))
                height = (y1 - y0);

	xoff = x0 - x;
	yoff = y0 - y;

        fgcol = fb_colour_to_pixel(c);

        bgcol = fb_colour_to_pixel(bg);

        /*LOG(("x %d, y %d, style %p, txt %.*s , len %d, bg 0x%lx, fg 0x%lx",
          x,y,style,length,text,length,bg,c));*/

        for (chr = 0; chr < length; chr++, x += fb_font->width) {
                if ((x + fb_font->width) > x1)
                        break;

                if (x < x0)
                        continue;

                pvideo = fb_16bpp_get_xy_loc(x, y0);

                /* move our font-data to the correct position */
                font_data = fb_font->data + (buffer[chr] * fb_font->height);

                for (yloop = 0; yloop < height; yloop++) {
                        row = font_data[yoff + yloop];
                        for (xloop = fb_font->width; xloop > 0 ; xloop--) {
                                if ((row & 1) != 0)
                                        *(pvideo + xloop) = fgcol;
                                row = row >> 1;
                        }
                        pvideo += (framebuffer->linelen >> 1);
                }
        }

	free(buffer);
	return true;
}
#endif

static bool fb_16bpp_disc(int x, int y, int radius, colour c, bool filled)
{
        LOG(("x %d, y %d, r %d, c 0x%lx, fill %d",
             x, y, radius, (unsigned long)c, filled));

	return true;
}

static bool fb_16bpp_arc(int x, int y, int radius, int angle1, int angle2,
                         colour c)
{
        LOG(("x %d, y %d, r %d, a1 %d, a2 %d, c 0x%lx",
             x, y, radius, angle1, angle2, (unsigned long)c));
	return true;
}


static bool fb_16bpp_bitmap(int x, int y, int width, int height,
			struct bitmap *bitmap, colour bg,
                        struct content *content)
{
        uint16_t *pvideo;
        colour *pixel = (colour *)bitmap->pixdata;
        colour abpixel; /* alphablended pixel */
        int xloop, yloop;
        int x0,y0,x1,y1;
	int xoff, yoff; /* x and y offset into image */


        /* TODO here we should scale the image from bitmap->width to width, for
         * now simply crop.
         */
        if (width > bitmap->width)
                width = bitmap->width;

        if (height > bitmap->height)
                height = bitmap->height;

        /* The part of the scaled image actually displayed is cropped to the
         * current context.
         */
        x0 = x;
        y0 = y;
        x1 = x + width;
        y1 = y + height;

        if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
                return true;


        LOG(("%d, %d  %d, %d  bitmap %p, content %p",
           x0,y0,x1,y1,bitmap,content));

        if (height > (y1 - y0))
                height = (y1 - y0);

        if (width > (x1 - x0))
                width = (x1 - x0);


	xoff = x0 - x;
	yoff = (y0 - y) * bitmap->width;
	height = height * bitmap->width + yoff;

        /* plot the image */
        pvideo = fb_16bpp_get_xy_loc(x0, y0);

        if (bitmap->opaque) {
                for (yloop = yoff; yloop < height; yloop += bitmap->width) {
                        for (xloop = 0; xloop < width; xloop++) {
                                abpixel = pixel[yloop + xloop + xoff];
                                *(pvideo + xloop) = fb_colour_to_pixel(abpixel);
                        }
                        pvideo += (framebuffer->linelen >> 1);
                }
        } else {
                for (yloop = yoff; yloop < height; yloop += bitmap->width) {
                        for (xloop = 0; xloop < width; xloop++) {
                                abpixel = pixel[yloop + xloop + xoff];
                                if ((abpixel & 0xFF000000) != 0) {
                                        if ((abpixel & 0xFF000000) != 0xFF000000) {
                                                abpixel = fb_plotters_ablend(abpixel,
                                                                             fb_16bpp_to_colour(*(pvideo + xloop)));
                                        }

                                        *(pvideo + xloop) = fb_colour_to_pixel(abpixel);
                                }
                        }
                        pvideo += (framebuffer->linelen >> 1);
                }
        }

	return true;
}

static bool fb_16bpp_bitmap_tile(int x, int y, int width, int height,
			struct bitmap *bitmap, colour bg,
			bool repeat_x, bool repeat_y,
                             struct content *content)
{
        return fb_plotters_bitmap_tile(x, y, width, height,
                                       bitmap, bg, repeat_x, repeat_y,
                                       content, fb_16bpp_bitmap);
}

static bool fb_16bpp_flush(void)
{
        LOG(("optional"));
	return true;
}

static bool fb_16bpp_path(const float *p, unsigned int n, colour fill, float width,
			colour c, const float transform[6])
{
        LOG(("%f, %d, 0x%lx, %f, 0x%lx, %f",
             *p, n, (unsigned long)fill, width, (unsigned long)c, *transform));
	return true;
}


const struct plotter_table framebuffer_16bpp_plot = {
	.clg = fb_16bpp_clg,
	.rectangle = fb_16bpp_rectangle,
	.line = fb_16bpp_line,
	.polygon = fb_16bpp_polygon,
	.fill = fb_16bpp_fill,
	.clip = fb_clip,
	.text = fb_16bpp_text,
	.disc = fb_16bpp_disc,
	.arc = fb_16bpp_arc,
	.bitmap = fb_16bpp_bitmap,
	.bitmap_tile = fb_16bpp_bitmap_tile,
	.flush = fb_16bpp_flush,
	.path = fb_16bpp_path,
        .option_knockout = true,
};

/*
 * Local Variables:
 * c-basic-offset:8
 * End:
 */