summaryrefslogtreecommitdiff
path: root/amiga/font.c
blob: 4175100fde7832b00e6bf59d9db18f6b3338961b (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
/*
 * Copyright 2008,2009 Chris Young <chris@unsatisfactorysoftware.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 <assert.h>
#include "css/css.h"
#include "render/font.h"
#include "amiga/gui.h"
#include <proto/graphics.h>
#include <proto/diskfont.h>
#include <graphics/rpattr.h>
#include "amiga/font.h"
#include "desktop/options.h"
#include "amiga/utf8.h"
#include "utils/utf8.h"
#include <diskfont/diskfonttag.h>
#include <diskfont/oterrors.h>
#include <proto/Picasso96API.h>
#include <proto/exec.h>
#include <graphics/blitattr.h>
#include "amiga/options.h"

struct OutlineFont *of[CSS_FONT_FAMILY_NOT_SET];

static bool nsfont_width(const struct css_style *style,
	  const char *string, size_t length,
    int *width);
       
static bool nsfont_position_in_string(const struct css_style *style,
	       const char *string, size_t length,
	  int x, size_t *char_offset, int *actual_x);
       
static bool nsfont_split(const struct css_style *style,
	  const char *string, size_t length,
    int x, size_t *char_offset, int *actual_x);

const struct font_functions nsfont = {
	nsfont_width,
	nsfont_position_in_string,
	nsfont_split
};

bool nsfont_width(const struct css_style *style,
		const char *string, size_t length,
		int *width)
{
	struct TextFont *tfont;

	if(option_quick_text)
	{
		tfont = ami_open_font(style);
		*width = TextLength(currp,string,length); //buffer,strlen(buffer));
		ami_close_font(tfont);
	}
	else
	{
		*width = ami_unicode_text(NULL,string,length,style,0,0,0);
	}

	return true;
}

/**
 * Find the position in a string where an x coordinate falls.
 *
 * \param  style        css_style for this text, with style->font_size.size ==
 *                      CSS_FONT_SIZE_LENGTH
 * \param  string       UTF-8 string to measure
 * \param  length       length of string
 * \param  x            x coordinate to search for
 * \param  char_offset  updated to offset in string of actual_x, [0..length]
 * \param  actual_x     updated to x coordinate of character closest to x
 * \return  true on success, false on error and error reported
 */

bool nsfont_position_in_string(const struct css_style *style,
		const char *string, size_t length,
		int x, size_t *char_offset, int *actual_x)
{
	struct TextExtent extent;
	struct TextFont *tfont = ami_open_font(style);

	*char_offset = TextFit(currp,string,length,
						&extent,NULL,1,x,32767);

	*actual_x = extent.te_Extent.MaxX;

	ami_close_font(tfont);
	return true;
}


/**
 * Find where to split a string to make it fit a width.
 *
 * \param  style        css_style for this text, with style->font_size.size ==
 *                      CSS_FONT_SIZE_LENGTH
 * \param  string       UTF-8 string to measure
 * \param  length       length of string
 * \param  x            width available
 * \param  char_offset  updated to offset in string of actual_x, [0..length]
 * \param  actual_x     updated to x coordinate of character closest to x
 * \return  true on success, false on error and error reported
 *
 * On exit, [char_offset == 0 ||
 *           string[char_offset] == ' ' ||
 *           char_offset == length]
 */

bool nsfont_split(const struct css_style *style,
		const char *string, size_t length,
		int x, size_t *char_offset, int *actual_x)
{
	struct TextExtent extent;
	ULONG co;
	char *charp;
	struct TextFont *tfont = ami_open_font(style);

	co = TextFit(currp,string,length,
				&extent,NULL,1,x,32767);

	charp = string+co;
	while(((*charp != ' ')) && (charp > string))
	{
		charp--;
		co--;
	}

	*char_offset = co;
	if(string && co)
	{
		*actual_x = TextLength(currp,string,co);
	}
	else
	{
		*actual_x = 0;
	}

	ami_close_font(tfont);
	return true;
}

struct TextFont *ami_open_font(struct css_style *style)
{
	struct TextFont *tfont;
	struct TTextAttr tattr;
	struct TagItem tattrtags[2];
	char fontname[256];

	switch(style->font_family)
	{
		case CSS_FONT_FAMILY_SANS_SERIF:
			strcpy(fontname,option_font_sans);
		break;

		case CSS_FONT_FAMILY_SERIF:
			strcpy(fontname,option_font_serif);
		break;

		case CSS_FONT_FAMILY_MONOSPACE:
			strcpy(fontname,option_font_mono);
		break;

		case CSS_FONT_FAMILY_CURSIVE:
			strcpy(fontname,option_font_cursive);
		break;

		case CSS_FONT_FAMILY_FANTASY:
			strcpy(fontname,option_font_fantasy);
		break;

		default:
			strcpy(fontname,option_font_sans);
		break;
	}

	switch(style->font_style)
	{
		case CSS_FONT_STYLE_ITALIC:
		case CSS_FONT_STYLE_OBLIQUE:
			tattr.tta_Style = FSF_ITALIC;
		break;

		default:
			tattr.tta_Style = FS_NORMAL;
		break;
	}

	switch(style->font_weight)
	{
		case CSS_FONT_WEIGHT_BOLD:
		case CSS_FONT_WEIGHT_BOLDER:
			tattr.tta_Style |= FSF_BOLD;
		break;
	}

/* not supported
	switch(style->font_variant)
	{
		default:
			//printf("font variant: %ld\n",style->font_variant);
		break;
	}
*/

	tattr.tta_YSize = css_len2px(&style->font_size.value.length, style);

	if(tattr.tta_YSize < option_font_min_size)
		tattr.tta_YSize = option_font_min_size;

	tattr.tta_Flags = 0;

/* Uncommenting this changes the font's charset.
   106 is UTF-8 but OS4 doesn't support it so this only results in a crash! 

	tattrtags[0].ti_Tag = TA_CharSet;
	tattrtags[0].ti_Data = 106;
	tattrtags[1].ti_Tag = TAG_DONE;

	tattr.tta_Flags = FSB_TAGGED;  
	tattr.tta_Tags = &tattrtags;
*/

	strcat(fontname,".font");
	tattr.tta_Name = fontname;

	tfont = OpenDiskFont((struct TextAttr *)&tattr);

	if(tfont)
	{
		SetRPAttrs(currp,
				RPTAG_Font,tfont,
				TAG_DONE);
	}

	return tfont;
}

struct OutlineFont *ami_open_outline_font(struct css_style *style)
{
	struct OutlineFont *ofont;
	char *fontname;
	WORD ysize;

	ofont = of[style->font_family];

/* see diskfont implementation for currently unimplemented bold/italic stuff */

	ysize = css_len2px(&style->font_size.value.length, style);

	if(ysize < option_font_min_size)
		ysize = option_font_min_size;

	if(ESetInfo(&ofont->olf_EEngine,
			OT_DeviceDPI,(72<<16) | 72,
			OT_PointHeight,(ysize<<16),
			TAG_END) == OTERR_Success)
	{
		return ofont;
	}

	return NULL;
}

void ami_close_font(struct TextFont *tfont)
{
	SetRPAttrs(currp,
			RPTAG_Font,origrpfont,
			TAG_DONE);

	if(tfont) CloseFont(tfont);
}

ULONG ami_unicode_text(struct RastPort *rp,char *string,ULONG length,struct css_style *style,ULONG dx, ULONG dy, ULONG c)
{
	WORD *utf16 = NULL;
	struct OutlineFont *ofont;
	struct GlyphMap *glyph;
	ULONG i,gx,gy;
	UBYTE *glyphbm;
	UWORD posn;
	struct BitMap *tbm;
	struct RastPort trp;
	uint32 width,height;
	uint32 x=0,y=0;

	if(!string || string[0]=='\0') return;
	if(!length) return;

	if(utf8_to_enc(string,"UTF-16",length,&utf16) != UTF8_CONVERT_OK) return;

	if(!(ofont = ami_open_outline_font(style))) return 0;

	SetRPAttrs(currp,RPTAG_APenColor,p96EncodeColor(RGBFB_A8B8G8R8,c),TAG_DONE);

	for(i=0;i<length;i++)
	{
		if(ESetInfo(&ofont->olf_EEngine,
			OT_GlyphCode,utf16[i],
			TAG_END) == OTERR_Success)
		{
			if(EObtainInfo(&ofont->olf_EEngine,
				OT_GlyphMap8Bit,&glyph,
				TAG_END) == 0)
			{
				glyphbm = glyph->glm_BitMap;
				if(!glyphbm) continue;

				if(rp)
				{
					BltBitMapTags(BLITA_SrcX,glyph->glm_BlackLeft,
						BLITA_SrcY,glyph->glm_BlackTop,
						BLITA_DestX,dx+x,
						BLITA_DestY,dy-glyph->glm_Y1,
						BLITA_Width,glyph->glm_X1,
						BLITA_Height,glyph->glm_BlackHeight,
						BLITA_Source,glyphbm,
						BLITA_SrcType,BLITT_ALPHATEMPLATE,
						BLITA_Dest,rp,
						BLITA_DestType,BLITT_RASTPORT,
						BLITA_SrcBytesPerRow,glyph->glm_BMModulo,
						TAG_DONE);
				}

				x+= glyph->glm_X1;

				EReleaseInfo(&ofont->olf_EEngine,
					OT_GlyphMap8Bit,glyph,
					TAG_END);
			}
				
		}

	}

	return x;
}

void ami_init_fonts(void)
{
	if(!option_quick_text)
	{
		of[CSS_FONT_FAMILY_SANS_SERIF] = OpenOutlineFont(option_font_sans,NULL,OFF_OPEN);
		of[CSS_FONT_FAMILY_SERIF] = OpenOutlineFont(option_font_serif,NULL,OFF_OPEN);
		of[CSS_FONT_FAMILY_MONOSPACE] = OpenOutlineFont(option_font_mono,NULL,OFF_OPEN);
		of[CSS_FONT_FAMILY_CURSIVE] = OpenOutlineFont(option_font_cursive,NULL,OFF_OPEN);
		of[CSS_FONT_FAMILY_FANTASY] = OpenOutlineFont(option_font_fantasy,NULL,OFF_OPEN);
		of[CSS_FONT_FAMILY_UNKNOWN] = OpenOutlineFont(option_font_sans,NULL,OFF_OPEN);
		of[CSS_FONT_FAMILY_NOT_SET] = OpenOutlineFont(option_font_sans,NULL,OFF_OPEN);
	}
}

void ami_close_fonts(void)
{
	int i=0;

	if(!option_quick_text)
	{
		for(i=0;i<=CSS_FONT_FAMILY_NOT_SET;i++)
		{
			if(of[i]) CloseOutlineFont(of[i],NULL);
		}
	}
}