| 1 | // all these must be powers of two |
1 | // all these must be powers of two |
|
|
2 | // width and height better be <=256 as we use bytes in the rendercache |
| 2 | #define TC_WIDTH 256 |
3 | #define TC_WIDTH 256 |
| 3 | #define TC_HEIGHT 256 |
4 | #define TC_HEIGHT 256 |
| 4 | #define TC_ROUND 4 |
5 | #define TC_ROUND 4 |
| 5 | |
6 | |
| 6 | typedef struct { |
7 | typedef struct { |
| 7 | GLuint name; |
8 | GLuint name; |
| 8 | int x, y, w, h; |
9 | int x, y, w, h; |
| 9 | } tc_area; |
10 | } tc_area; |
| 10 | |
11 | |
|
|
12 | extern int tc_generation; |
|
|
13 | |
| 11 | void tc_get (tc_area *area, int width, int height); |
14 | static void tc_get (tc_area *area, int width, int height); |
| 12 | void tc_put (tc_area *area); |
15 | static void tc_put (tc_area *area); |
| 13 | void tc_clear (); |
16 | static void tc_clear (void); |
|
|
17 | static void tc_backup (void); |
|
|
18 | static void tc_restore (void); |
| 14 | |
19 | |
| 15 | ///////////////////////////////////////////////////////////////////////////// |
20 | ///////////////////////////////////////////////////////////////////////////// |
| 16 | |
21 | |
|
|
22 | // required as bug-workaround for apple/ati/... |
|
|
23 | static unsigned char tc_temptile [TC_WIDTH * TC_HEIGHT]; |
|
|
24 | |
| 17 | #include <glib.h> |
25 | #include <glib.h> |
|
|
26 | |
|
|
27 | int tc_generation; |
| 18 | |
28 | |
| 19 | typedef struct tc_texture { |
29 | typedef struct tc_texture { |
| 20 | struct tc_texture *next; |
30 | struct tc_texture *next; |
| 21 | GLuint name; |
31 | GLuint name; |
| 22 | int avail; |
32 | int avail; |
|
|
33 | char *saved; /* stores saved texture data */ |
| 23 | } tc_texture; |
34 | } tc_texture; |
| 24 | |
35 | |
| 25 | typedef struct tc_slice { |
36 | typedef struct tc_slice { |
| 26 | GLuint name; |
37 | GLuint name; |
| 27 | int avail, y; |
38 | int avail, y; |
| … | |
… | |
| 29 | |
40 | |
| 30 | static tc_slice slices[TC_HEIGHT / TC_ROUND]; |
41 | static tc_slice slices[TC_HEIGHT / TC_ROUND]; |
| 31 | static tc_texture *first_texture; |
42 | static tc_texture *first_texture; |
| 32 | |
43 | |
| 33 | void |
44 | void |
| 34 | tc_clear () |
45 | tc_clear (void) |
| 35 | { |
46 | { |
| 36 | int i; |
47 | int i; |
| 37 | |
48 | |
| 38 | for (i = TC_HEIGHT / TC_ROUND; i--; ) |
49 | for (i = TC_HEIGHT / TC_ROUND; i--; ) |
| 39 | slices [i].name = 0; |
50 | slices [i].name = 0; |
| 40 | |
51 | |
| 41 | while (first_texture) |
52 | while (first_texture) |
| 42 | { |
53 | { |
| 43 | tc_texture *next = first_texture->next; |
54 | tc_texture *next = first_texture->next; |
| 44 | glDeleteTextures (1, &first_texture->name); |
55 | del_texture (first_texture->name); |
| 45 | g_slice_free (tc_texture, first_texture); |
56 | g_slice_free (tc_texture, first_texture); |
| 46 | first_texture = next; |
57 | first_texture = next; |
| 47 | } |
58 | } |
|
|
59 | |
|
|
60 | ++tc_generation; |
|
|
61 | } |
|
|
62 | |
|
|
63 | void |
|
|
64 | tex_backup (tc_texture *tex) |
|
|
65 | { |
|
|
66 | tex->saved = (char *)g_slice_alloc (TC_WIDTH * TC_HEIGHT); |
|
|
67 | |
|
|
68 | glBindTexture (GL_TEXTURE_2D, tex->name); |
|
|
69 | glGetTexImage (GL_TEXTURE_2D, 0, GL_ALPHA, GL_UNSIGNED_BYTE, tex->saved); |
|
|
70 | } |
|
|
71 | |
|
|
72 | void |
|
|
73 | tex_restore (tc_texture *tex) |
|
|
74 | { |
|
|
75 | glBindTexture (GL_TEXTURE_2D, tex->name); |
|
|
76 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
|
|
77 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
|
|
78 | glTexImage2D (GL_TEXTURE_2D, 0, GL_ALPHA, TC_WIDTH, TC_HEIGHT, 0, GL_ALPHA, GL_UNSIGNED_BYTE, tex->saved); |
|
|
79 | |
|
|
80 | g_slice_free1 (TC_WIDTH * TC_HEIGHT, tex->saved); |
|
|
81 | tex->saved = 0; |
|
|
82 | } |
|
|
83 | |
|
|
84 | void |
|
|
85 | tc_backup (void) |
|
|
86 | { |
|
|
87 | tc_texture *tex; |
|
|
88 | |
|
|
89 | for (tex = first_texture; tex; tex = tex->next) |
|
|
90 | tex_backup (tex); |
|
|
91 | } |
|
|
92 | |
|
|
93 | void |
|
|
94 | tc_restore (void) |
|
|
95 | { |
|
|
96 | tc_texture *tex; |
|
|
97 | |
|
|
98 | for (tex = first_texture; tex; tex = tex->next) |
|
|
99 | tex_restore (tex); |
| 48 | } |
100 | } |
| 49 | |
101 | |
| 50 | void |
102 | void |
| 51 | tc_get (tc_area *area, int width, int height) |
103 | tc_get (tc_area *area, int width, int height) |
| 52 | { |
104 | { |
| … | |
… | |
| 69 | |
121 | |
| 70 | // create a new texture if necessary |
122 | // create a new texture if necessary |
| 71 | if (!match) |
123 | if (!match) |
| 72 | { |
124 | { |
| 73 | match = g_slice_new (tc_texture); |
125 | match = g_slice_new (tc_texture); |
| 74 | match->next = first_texture; |
126 | match->next = first_texture; |
| 75 | first_texture = match; |
127 | first_texture = match; |
| 76 | glGenTextures (1, &match->name); |
128 | match->name = gen_texture (); |
| 77 | match->avail = TC_HEIGHT; |
129 | match->avail = TC_HEIGHT; |
|
|
130 | match->saved = 0; |
| 78 | |
131 | |
| 79 | glBindTexture (GL_TEXTURE_2D, match->name); |
132 | glBindTexture (GL_TEXTURE_2D, match->name); |
| 80 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
133 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
| 81 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
134 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
| 82 | glTexImage2D (GL_TEXTURE_2D, 0, GL_ALPHA, TC_WIDTH, TC_HEIGHT, 0, GL_ALPHA, GL_UNSIGNED_BYTE, 0); |
135 | |
|
|
136 | // the last parameter should be NULL, but way too amny drivers (ATI, Mesa) crash, |
|
|
137 | // so we better provide some random garbage data for them. |
|
|
138 | glTexImage2D (GL_TEXTURE_2D, |
|
|
139 | 0, GL_ALPHA, |
|
|
140 | TC_WIDTH, TC_HEIGHT, |
|
|
141 | 0, GL_ALPHA, |
|
|
142 | GL_UNSIGNED_BYTE, tc_temptile); |
| 83 | } |
143 | } |
| 84 | |
144 | |
| 85 | match->avail -= slice_height; |
145 | match->avail -= slice_height; |
| 86 | |
146 | |
| 87 | slice->name = match->name; |
147 | slice->name = match->name; |
