source: mainline/uspace/app/fontviewer/fontviewer.c@ 2aaba7e

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 2aaba7e was 05b59393, checked in by jzr <zarevucky.jiri@…>, 8 years ago

Fix a couple of benign clang warnings.
No change in semantics.
  • Property mode set to 100644
File size: 7.5 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 <stdlib.h>
37#include <errno.h>
38#include <malloc.h>
39#include <stdbool.h>
40#include <window.h>
41#include <canvas.h>
42#include <surface.h>
43#include <codec/tga.h>
44#include <task.h>
45#include <drawctx.h>
46#include <font/embedded.h>
47#include <font/pcf.h>
48#include <stdarg.h>
49#include <io/verify.h>
50
51#define NAME "fontviewer"
52
53#define WINDOW_WIDTH 640
54#define WINDOW_HEIGHT 480
55
56static window_t *main_window;
57static surface_t *surface = NULL;
58static canvas_t *canvas = NULL;
59static surface_coord_t width, height;
60uint16_t points = 16;
61bool show_metrics = true;
62char *font_path = NULL;
63
64static int draw(void);
65
66static void on_keyboard_event(widget_t *widget, void *data)
67{
68 kbd_event_t *event = (kbd_event_t *) data;
69
70 if (event->type == KEY_PRESS) {
71 if (event->c == 'q')
72 exit(0);
73
74 if (event->key == KC_UP || event->key == KC_DOWN) {
75 uint16_t increment = (event->mods & KM_SHIFT) ? 10 : 1;
76
77 if (event->key == KC_UP)
78 points += increment;
79
80 if (event->key == KC_DOWN) {
81 if (points <= increment) {
82 points = 1;
83 }
84 else {
85 points-= increment;
86 }
87 }
88
89 if (points < 1)
90 points = 1;
91 }
92
93 if (event->c == 'm')
94 show_metrics = !show_metrics;
95 }
96
97 int rc = draw();
98 if (rc != EOK) {
99 printf("Failed drawing: %d.\n", rc);
100 exit(1);
101 }
102 update_canvas(canvas, surface);
103}
104
105static int create_font(font_t **font, uint16_t points)
106{
107 if (font_path == NULL) {
108 return embedded_font_create(font, points);
109 }
110
111 return pcf_font_create(font, font_path, points);
112}
113
114static source_t rgb(uint8_t r, uint8_t g, uint8_t b)
115{
116 source_t source;
117 source_init(&source);
118 source_set_color(&source, PIXEL(255, r, g, b));
119 return source;
120}
121
122static void horizontal_rectangle(drawctx_t *drawctx, surface_coord_t x1,
123 surface_coord_t y1, surface_coord_t x2, surface_coord_t y2,
124 source_t *source)
125{
126 if (y2 < y1)
127 return;
128
129 drawctx_set_source(drawctx, source);
130 drawctx_transfer(drawctx, x1, y1, x2 - x1 + 1, y2 - y1 + 1);
131}
132
133static void horizontal_line(drawctx_t *drawctx, surface_coord_t y,
134 surface_coord_t x1, surface_coord_t x2, source_t *source)
135{
136 horizontal_rectangle(drawctx, x1, y, x2, y, source);
137}
138
139static int text(drawctx_t *, font_t *, source_t *, surface_coord_t x,
140 surface_coord_t , const char *, ...) PRINTF_ATTRIBUTE(6, 7);
141static int text(drawctx_t *drawctx, font_t *font, source_t *source,
142 surface_coord_t x, surface_coord_t y, const char *fmt, ...)
143{
144 char *str = NULL;
145 va_list args;
146 va_start(args, fmt);
147 int ret = vasprintf(&str, fmt, args);
148 va_end(args);
149
150 if (ret <= 0)
151 return ret;
152
153 drawctx_set_source(drawctx, source);
154 drawctx_set_font(drawctx, font);
155 drawctx_print(drawctx, str, x, y);
156
157 free(str);
158
159 return ret;
160}
161
162
163static int draw(void)
164{
165 source_t background = rgb(255, 255, 255);
166 source_t foreground = rgb(0, 0, 0);
167 source_t glyphs = rgb(0, 0, 255);
168 source_t ascender_bg = rgb(255, 230, 128);
169 source_t ascender_fg = rgb(255, 153, 85);
170 source_t descender_bg = rgb(204, 255, 170);
171 source_t descender_fg = rgb(85, 212, 0);
172 source_t leading_bg = rgb(170, 238, 255);
173 source_t leading_fg = rgb(0, 170, 212);
174
175 font_t *font;
176 int rc = create_font(&font, points);
177 if (rc != EOK) {
178 printf("Failed creating font\n");
179 return rc;
180 }
181
182 font_t *info_font;
183 rc = embedded_font_create(&info_font, 16);
184 if (rc != EOK) {
185 printf("Failed creating info font\n");
186 return rc;
187 }
188
189 font_metrics_t font_metrics;
190 rc = font_get_metrics(font, &font_metrics);
191 if (rc != EOK)
192 return rc;
193
194 surface_coord_t top = 50;
195 metric_t ascender_top = top;
196 metric_t descender_top = ascender_top + font_metrics.ascender;
197 metric_t leading_top = descender_top + font_metrics.descender;
198 metric_t line_bottom = leading_top + font_metrics.leading;
199
200 drawctx_t drawctx;
201 drawctx_init(&drawctx, surface);
202
203 drawctx_set_source(&drawctx, &background);
204 drawctx_transfer(&drawctx, 0, 0,
205 width, height);
206
207 if (show_metrics) {
208 horizontal_rectangle(&drawctx, 0, ascender_top, width,
209 descender_top - 1, &ascender_bg);
210 horizontal_line(&drawctx, ascender_top, 0, width,
211 &ascender_fg);
212
213 horizontal_rectangle(&drawctx, 0, descender_top, width,
214 leading_top - 1, &descender_bg);
215 horizontal_line(&drawctx, descender_top, 0, width,
216 &descender_fg);
217
218 horizontal_rectangle(&drawctx, 0, leading_top,
219 width, line_bottom - 1, &leading_bg);
220 horizontal_line(&drawctx, leading_top, 0, width,
221 &leading_fg);
222 }
223
224 drawctx_set_source(&drawctx, &glyphs);
225 drawctx_set_font(&drawctx, font);
226 drawctx_print(&drawctx, "Čaj'_", 0, top);
227
228 if (show_metrics) {
229 surface_coord_t infos_top = line_bottom + 10;
230 text(&drawctx, info_font, &ascender_fg, 0, infos_top,
231 "Ascender: %d", font_metrics.ascender);
232 text(&drawctx, info_font, &descender_fg, 0, infos_top + 16,
233 "Descender: %d", font_metrics.descender);
234 text(&drawctx, info_font, &foreground, 0, infos_top + 32,
235 "Line height: %d",
236 font_metrics.ascender + font_metrics.descender);
237 text(&drawctx, info_font, &leading_fg, 0, infos_top + 48,
238 "Leading: %d", font_metrics.leading);
239
240 }
241
242 font_release(font);
243 return EOK;
244}
245
246int main(int argc, char *argv[])
247{
248 if (argc < 2) {
249 printf("Compositor server not specified.\n");
250 return 1;
251 }
252
253 if (argc < 3) {
254 font_path = NULL;
255 }
256 else {
257 font_path = argv[2];
258 }
259
260 main_window = window_open(argv[1], NULL, WINDOW_MAIN, "fontviewer");
261 if (!main_window) {
262 printf("Cannot open main window.\n");
263 return 2;
264 }
265
266 surface = surface_create(WINDOW_WIDTH, WINDOW_HEIGHT, NULL,
267 SURFACE_FLAG_NONE);
268 if (surface == NULL) {
269 printf("Cannot create surface.\n");
270 return 2;
271 }
272
273 width = WINDOW_WIDTH;
274 height = WINDOW_HEIGHT;
275
276 int rc = draw();
277 if (rc != EOK) {
278 printf("Failed drawing: %d.\n", rc);
279 return 2;
280 }
281
282 canvas = create_canvas(window_root(main_window), NULL,
283 WINDOW_WIDTH, WINDOW_HEIGHT, surface);
284 if (canvas == NULL) {
285 printf("Cannot create canvas.\n");
286 return 2;
287 }
288 sig_connect(&canvas->keyboard_event, NULL, on_keyboard_event);
289
290 window_resize(main_window, 200, 200, WINDOW_WIDTH, WINDOW_HEIGHT,
291 WINDOW_PLACEMENT_ABSOLUTE);
292 window_exec(main_window);
293
294 task_retval(0);
295 async_manager();
296
297 return 0;
298}
299
300/** @}
301 */
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