source: mainline/uspace/app/fontviewer/fontviewer.c@ fc22069

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since fc22069 was 2c7fdaa, checked in by Martin Decky <martin@…>, 10 years ago

resize only those windows that declare and support resizing capabilities
introduce generic window flags
  • Property mode set to 100644
File size: 7.6 KB
Line 
1/*
2 * Copyright (c) 2014 Martin Sucha
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup fontviewer
30 * @{
31 */
32/** @file
33 */
34
35#include <stdio.h>
36#include <unistd.h>
37#include <fcntl.h>
38#include <sys/stat.h>
39#include <errno.h>
40#include <malloc.h>
41#include <stdbool.h>
42#include <window.h>
43#include <canvas.h>
44#include <surface.h>
45#include <codec/tga.h>
46#include <task.h>
47#include <drawctx.h>
48#include <font/embedded.h>
49#include <font/pcf.h>
50#include <stdarg.h>
51#include <io/verify.h>
52
53#define NAME "fontviewer"
54
55#define WINDOW_WIDTH 640
56#define WINDOW_HEIGHT 480
57
58static window_t *main_window;
59static surface_t *surface = NULL;
60static canvas_t *canvas = NULL;
61static surface_coord_t width, height;
62uint16_t points = 16;
63bool show_metrics = true;
64char *font_path = NULL;
65
66static int draw(void);
67
68static void on_keyboard_event(widget_t *widget, void *data)
69{
70 kbd_event_t *event = (kbd_event_t *) data;
71
72 if (event->type == KEY_PRESS) {
73 if (event->c == 'q')
74 exit(0);
75
76 if (event->key == KC_UP || event->key == KC_DOWN) {
77 uint16_t increment = (event->mods & KM_SHIFT) ? 10 : 1;
78
79 if (event->key == KC_UP)
80 points += increment;
81
82 if ((event->key == KC_DOWN)) {
83 if (points <= increment) {
84 points = 1;
85 }
86 else {
87 points-= increment;
88 }
89 }
90
91 if (points < 1)
92 points = 1;
93 }
94
95 if (event->c == 'm')
96 show_metrics = !show_metrics;
97 }
98
99 int rc = draw();
100 if (rc != EOK) {
101 printf("Failed drawing: %d.\n", rc);
102 exit(1);
103 }
104 update_canvas(canvas, surface);
105}
106
107static int create_font(font_t **font, uint16_t points)
108{
109 if (font_path == NULL) {
110 return embedded_font_create(font, points);
111 }
112
113 return pcf_font_create(font, font_path, points);
114}
115
116static source_t rgb(uint8_t r, uint8_t g, uint8_t b)
117{
118 source_t source;
119 source_init(&source);
120 source_set_color(&source, PIXEL(255, r, g, b));
121 return source;
122}
123
124static void horizontal_rectangle(drawctx_t *drawctx, surface_coord_t x1,
125 surface_coord_t y1, surface_coord_t x2, surface_coord_t y2,
126 source_t *source)
127{
128 if (y2 < y1)
129 return;
130
131 drawctx_set_source(drawctx, source);
132 drawctx_transfer(drawctx, x1, y1, x2 - x1 + 1, y2 - y1 + 1);
133}
134
135static void horizontal_line(drawctx_t *drawctx, surface_coord_t y,
136 surface_coord_t x1, surface_coord_t x2, source_t *source)
137{
138 horizontal_rectangle(drawctx, x1, y, x2, y, source);
139}
140
141static int text(drawctx_t *, font_t *, source_t *, surface_coord_t x,
142 surface_coord_t , const char *, ...) PRINTF_ATTRIBUTE(6, 7);
143static int text(drawctx_t *drawctx, font_t *font, source_t *source,
144 surface_coord_t x, surface_coord_t y, const char *fmt, ...)
145{
146 char *str = NULL;
147 va_list args;
148 va_start(args, fmt);
149 int ret = vasprintf(&str, fmt, args);
150 va_end(args);
151
152 if (ret <= 0)
153 return ret;
154
155 drawctx_set_source(drawctx, source);
156 drawctx_set_font(drawctx, font);
157 drawctx_print(drawctx, str, x, y);
158
159 free(str);
160
161 return ret;
162}
163
164
165static int draw(void)
166{
167 source_t background = rgb(255, 255, 255);
168 source_t foreground = rgb(0, 0, 0);
169 source_t glyphs = rgb(0, 0, 255);
170 source_t ascender_bg = rgb(255, 230, 128);
171 source_t ascender_fg = rgb(255, 153, 85);
172 source_t descender_bg = rgb(204, 255, 170);
173 source_t descender_fg = rgb(85, 212, 0);
174 source_t leading_bg = rgb(170, 238, 255);
175 source_t leading_fg = rgb(0, 170, 212);
176
177 font_t *font;
178 int rc = create_font(&font, points);
179 if (rc != EOK) {
180 printf("Failed creating font\n");
181 return rc;
182 }
183
184 font_t *info_font;
185 rc = embedded_font_create(&info_font, 16);
186 if (rc != EOK) {
187 printf("Failed creating info font\n");
188 return rc;
189 }
190
191 font_metrics_t font_metrics;
192 rc = font_get_metrics(font, &font_metrics);
193 if (rc != EOK)
194 return rc;
195
196 surface_coord_t top = 50;
197 metric_t ascender_top = top;
198 metric_t descender_top = ascender_top + font_metrics.ascender;
199 metric_t leading_top = descender_top + font_metrics.descender;
200 metric_t line_bottom = leading_top + font_metrics.leading;
201
202 drawctx_t drawctx;
203 drawctx_init(&drawctx, surface);
204
205 drawctx_set_source(&drawctx, &background);
206 drawctx_transfer(&drawctx, 0, 0,
207 width, height);
208
209 if (show_metrics) {
210 horizontal_rectangle(&drawctx, 0, ascender_top, width,
211 descender_top - 1, &ascender_bg);
212 horizontal_line(&drawctx, ascender_top, 0, width,
213 &ascender_fg);
214
215 horizontal_rectangle(&drawctx, 0, descender_top, width,
216 leading_top - 1, &descender_bg);
217 horizontal_line(&drawctx, descender_top, 0, width,
218 &descender_fg);
219
220 horizontal_rectangle(&drawctx, 0, leading_top,
221 width, line_bottom - 1, &leading_bg);
222 horizontal_line(&drawctx, leading_top, 0, width,
223 &leading_fg);
224 }
225
226 drawctx_set_source(&drawctx, &glyphs);
227 drawctx_set_font(&drawctx, font);
228 drawctx_print(&drawctx, "Čaj'_", 0, top);
229
230 if (show_metrics) {
231 surface_coord_t infos_top = line_bottom + 10;
232 text(&drawctx, info_font, &ascender_fg, 0, infos_top,
233 "Ascender: %d", font_metrics.ascender);
234 text(&drawctx, info_font, &descender_fg, 0, infos_top + 16,
235 "Descender: %d", font_metrics.descender);
236 text(&drawctx, info_font, &foreground, 0, infos_top + 32,
237 "Line height: %d",
238 font_metrics.ascender + font_metrics.descender);
239 text(&drawctx, info_font, &leading_fg, 0, infos_top + 48,
240 "Leading: %d", font_metrics.leading);
241
242 }
243
244 font_release(font);
245 return EOK;
246}
247
248int main(int argc, char *argv[])
249{
250 if (argc < 2) {
251 printf("Compositor server not specified.\n");
252 return 1;
253 }
254
255 if (argc < 3) {
256 font_path = NULL;
257 }
258 else {
259 font_path = argv[2];
260 }
261
262 main_window = window_open(argv[1], WINDOW_MAIN, "fontviewer");
263 if (!main_window) {
264 printf("Cannot open main window.\n");
265 return 2;
266 }
267
268 surface = surface_create(WINDOW_WIDTH, WINDOW_HEIGHT, NULL,
269 SURFACE_FLAG_NONE);
270 if (surface == NULL) {
271 printf("Cannot create surface.\n");
272 return 2;
273 }
274
275 width = WINDOW_WIDTH;
276 height = WINDOW_HEIGHT;
277
278 int rc = draw();
279 if (rc != EOK) {
280 printf("Failed drawing: %d.\n", rc);
281 return 2;
282 }
283
284 canvas = create_canvas(window_root(main_window),
285 WINDOW_WIDTH, WINDOW_HEIGHT, surface);
286 if (canvas == NULL) {
287 printf("Cannot create canvas.\n");
288 return 2;
289 }
290 sig_connect(&canvas->keyboard_event, NULL, on_keyboard_event);
291
292 window_resize(main_window, 200, 200, WINDOW_WIDTH, WINDOW_HEIGHT,
293 WINDOW_PLACEMENT_ABSOLUTE);
294 window_exec(main_window);
295
296 task_retval(0);
297 async_manager();
298
299 return 0;
300}
301
302/** @}
303 */
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