1 /*
2 * Copyright (C) 2014 Neverball authors
3 *
4 * NEVERBALL is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published
6 * by the Free Software Foundation; either version 2 of the License,
7 * or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 */
14
15 #include "theme.h"
16 #include "config.h"
17 #include "image.h"
18 #include "video.h"
19
20 /*---------------------------------------------------------------------------*/
21
22 static const char theme_images[THEME_IMAGES_MAX][PATHMAX] = {
23 "back-plain.png", /* off and inactive */
24 "back-plain-focus.png", /* off and active */
25 "back-hilite.png", /* on and inactive */
26 "back-hilite-focus.png" /* on and active */
27 };
28
theme_image(const char * path)29 static GLuint theme_image(const char *path)
30 {
31 const int W = video.device_w;
32 const int H = video.device_h;
33
34 int W2, H2;
35
36 int w, h, b;
37 void *p;
38
39 GLuint o = 0;
40
41 /*
42 * Disable mipmapping and do a manual downscale. Heuristic for
43 * downscaling the texture: assume target size to be roughly 1/16
44 * of a full screen texture, smallest size being 32x32.
45 */
46
47 image_near2(&W2, &H2, W, H);
48
49 W2 = MAX(W2 / 16, 32);
50 H2 = MAX(H2 / 16, 32);
51
52 if ((p = image_load(path, &w, &h, &b)))
53 {
54 void *q;
55
56 /* Prefer a small scale factor. */
57
58 int s = MAX(w, h) / MAX(W2, H2);
59
60 if (s > 1 && (q = image_scale(p, w, h, b, &w, &h, s)))
61 {
62 free(p);
63 p = q;
64 }
65
66 o = make_texture(p, w, h, b, 0);
67
68 free(p);
69 p = NULL;
70 }
71
72 return o;
73 }
74
theme_path(const char * name,const char * file)75 static const char *theme_path(const char *name, const char *file)
76 {
77 static char path[MAXSTR];
78
79 if ((name && *name) && (file && *file))
80 {
81 SAFECPY(path, "gui/");
82 SAFECAT(path, name);
83 SAFECAT(path, "/");
84 SAFECAT(path, file);
85 return path;
86 }
87 return "";
88 }
89
theme_load(struct theme * theme,const char * name)90 int theme_load(struct theme *theme, const char *name)
91 {
92 char buff[MAXSTR];
93 fs_file fp;
94
95 float s[4] = { 0.25f, 0.25f, 0.25f, 0.25f };
96
97 int i;
98
99 if (theme && name && *name)
100 {
101 memset(theme, 0, sizeof (*theme));
102
103 /* Load description. */
104
105 if ((fp = fs_open(theme_path(name, "theme.txt"), "r")))
106 {
107 while ((fs_gets(buff, sizeof (buff), fp)))
108 {
109 strip_newline(buff);
110
111 if (strncmp(buff, "slice ", 6) == 0)
112 sscanf(buff + 6, "%f %f %f %f", &s[0], &s[1], &s[2], &s[3]);
113 }
114
115 fs_close(fp);
116 }
117 else
118 {
119 log_printf("Failure to open \"%s\" theme file\n", name);
120 }
121
122 theme->s[0] = 0.0f;
123 theme->s[1] = s[0];
124 theme->s[2] = (1.0f - s[1]);
125 theme->s[3] = 1.0f;
126
127 theme->t[0] = 1.0f;
128 theme->t[1] = (1.0f - s[2]);
129 theme->t[2] = s[3];
130 theme->t[3] = 0.0f;
131
132 /* Load textures. */
133
134 for (i = 0; i < ARRAYSIZE(theme_images); i++)
135 theme->tex[i] = theme_image(theme_path(name, theme_images[i]));
136
137 return 1;
138 }
139 return 0;
140 }
141
theme_free(struct theme * theme)142 void theme_free(struct theme *theme)
143 {
144 int i;
145
146 if (theme)
147 {
148 glDeleteTextures(THEME_IMAGES_MAX, theme->tex);
149
150 for (i = 0; i < THEME_IMAGES_MAX; i++)
151 theme->tex[i] = 0;
152 }
153 }
154
155 /*---------------------------------------------------------------------------*/
156