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/cvs/deliantra/Deliantra-Client/texcache.c
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Comparing deliantra/Deliantra-Client/texcache.c (file contents):
Revision 1.3 by root, Fri Apr 27 21:27:51 2007 UTC vs.
Revision 1.8 by root, Sun Nov 29 14:45:12 2009 UTC

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
6typedef struct { 7typedef struct {
… …
8 int x, y, w, h; 9 int x, y, w, h;
9} tc_area; 10} tc_area;
10 11
11extern int tc_generation; 12extern int tc_generation;
12 13
13void tc_get (tc_area *area, int width, int height); 14static void tc_get (tc_area *area, int width, int height);
14void tc_put (tc_area *area); 15static void tc_put (tc_area *area);
15void tc_clear (); 16static void tc_clear (void);
17static void tc_backup (void);
18static void tc_restore (void);
16 19
17///////////////////////////////////////////////////////////////////////////// 20/////////////////////////////////////////////////////////////////////////////
21
22// required as bug-workaround for apple/ati/...
23static unsigned char tc_temptile [TC_WIDTH * TC_HEIGHT];
18 24
19#include <glib.h> 25#include <glib.h>
20 26
21int tc_generation; 27int tc_generation;
22 28
23typedef struct tc_texture { 29typedef struct tc_texture {
24 struct tc_texture *next; 30 struct tc_texture *next;
25 GLuint name; 31 GLuint name;
26 int avail; 32 int avail;
33 char *saved; /* stores saved texture data */
27} tc_texture; 34} tc_texture;
28 35
29typedef struct tc_slice { 36typedef struct tc_slice {
30 GLuint name; 37 GLuint name;
31 int avail, y; 38 int avail, y;
… …
33 40
34static tc_slice slices[TC_HEIGHT / TC_ROUND]; 41static tc_slice slices[TC_HEIGHT / TC_ROUND];
35static tc_texture *first_texture; 42static tc_texture *first_texture;
36 43
37void 44void
38tc_clear () 45tc_clear (void)
39{ 46{
40 int i; 47 int i;
41 48
42 for (i = TC_HEIGHT / TC_ROUND; i--; ) 49 for (i = TC_HEIGHT / TC_ROUND; i--; )
43 slices [i].name = 0; 50 slices [i].name = 0;
… …
49 g_slice_free (tc_texture, first_texture); 56 g_slice_free (tc_texture, first_texture);
50 first_texture = next; 57 first_texture = next;
51 } 58 }
52 59
53 ++tc_generation; 60 ++tc_generation;
61}
62
63void
64tex_backup (tc_texture *tex)
65{
66 tex->saved = 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
72void
73tex_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
84void
85tc_backup (void)
86{
87 tc_texture *tex;
88
89 for (tex = first_texture; tex; tex = tex->next)
90 tex_backup (tex);
91}
92
93void
94tc_restore (void)
95{
96 tc_texture *tex;
97
98 for (tex = first_texture; tex; tex = tex->next)
99 tex_restore (tex);
54} 100}
55 101
56void 102void
57tc_get (tc_area *area, int width, int height) 103tc_get (tc_area *area, int width, int height)
58{ 104{
… …
75 121
76 // create a new texture if necessary 122 // create a new texture if necessary
77 if (!match) 123 if (!match)
78 { 124 {
79 match = g_slice_new (tc_texture); 125 match = g_slice_new (tc_texture);
80 match->next = first_texture; 126 match->next = first_texture;
81 first_texture = match; 127 first_texture = match;
82 match->name = gen_texture (); 128 match->name = gen_texture ();
83 match->avail = TC_HEIGHT; 129 match->avail = TC_HEIGHT;
130 match->saved = 0;
84 131
85 glBindTexture (GL_TEXTURE_2D, match->name); 132 glBindTexture (GL_TEXTURE_2D, match->name);
86 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 133 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
87 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 134 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
88 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);
89 } 143 }
90 144
91 match->avail -= slice_height; 145 match->avail -= slice_height;
92 146
93 slice->name = match->name; 147 slice->name = match->name;

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