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/cvs/cf.schmorp.de/Deliantra-Client/rendercache.c
Revision: 1.15
Committed: Mon Nov 19 01:23:01 2018 UTC (5 years, 8 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.14: +4 -2 lines
Log Message:
*** empty log message ***

File Contents

# Content
1 #include <vector>
2
3 #include "salloc.h"
4
5 struct rc_key_t
6 {
7 GLenum mode;
8 GLenum format; // 0, GL_T2F_V3F, GL_V2F
9 GLuint texname;
10 unsigned char r, g, b, a;
11
12 bool operator == (const rc_key_t &o) const
13 {
14 return mode == o.mode
15 && format == o.format
16 && texname == o.texname
17 && r == o.r
18 && g == o.g
19 && b == o.b
20 && a == o.a;
21 }
22 };
23
24 namespace std {
25 template <>
26 struct hash<rc_key_t>
27 {
28 size_t operator () (const rc_key_t &v) const
29 {
30 return v.mode + (v.format << 4) + v.texname + (v.r << 8) + (v.g << 16) + (v.b << 24) + v.a;
31 }
32 };
33 }
34
35 struct rc_t
36 {
37 struct glyph_data
38 {
39 uint8_t u, v, w, h;
40 uint16_t x, y;
41 };
42
43 struct array_t
44 : std::vector<uint8_t, slice_allocator<uint8_t>>
45 {
46 using std::vector<uint8_t, slice_allocator<uint8_t>>::vector;
47
48 template<typename T>
49 T &append ()
50 {
51 auto ofs = size ();
52 resize (ofs + sizeof (T));
53 return *(T *)(data () + ofs);
54 }
55
56 void v2f (float x, float y)
57 {
58 auto &vec = append<float[2]> ();
59 vec[0] = x / 2;
60 vec[1] = y / 2;
61 }
62
63 void t2f_v3f (float u, float v, float x, float y, float z)
64 {
65 auto &vec = append<float[5]> ();
66 vec[0] = u;
67 vec[1] = v;
68 vec[2] = x;
69 vec[3] = y;
70 vec[4] = z;
71 }
72
73 void glyph (int u, int v, int w, int h, int x, int y)
74 {
75 if (w && h)
76 {
77 auto &c = append<glyph_data> ();
78
79 c.u = u;
80 c.v = v;
81 c.w = w;
82 c.h = h;
83 c.x = x + w;
84 c.y = y + h;
85 }
86 }
87 };
88
89 int drawcount = 0;
90 ska::flat_hash_map<rc_key_t, array_t> h;
91
92 void clear ()
93 {
94 drawcount = 0;
95 h.clear ();
96 }
97
98 array_t &array (const rc_key_t &k)
99 {
100 return h[k];
101 }
102
103 void draw ()
104 {
105 for (auto &&it = h.begin (); it != h.end (); ++it)
106 {
107 rc_key_t &key = it->first;
108 array_t &arr = it->second;
109 GLsizei stride;
110
111 if (key.texname)
112 {
113 glBindTexture (GL_TEXTURE_2D, key.texname);
114 glEnable (GL_TEXTURE_2D);
115 }
116 else
117 glDisable (GL_TEXTURE_2D);
118
119 glColor4ub (key.r, key.g, key.b, key.a);
120
121 if (key.format)
122 {
123 stride = key.format == GL_T2F_V3F ? sizeof (float) * 5
124 : key.format == GL_V2F ? sizeof (float) * 2
125 : 65536;
126
127 glInterleavedArrays (key.format, 0, (void *)arr.data ());
128 //glLockArraysEXT (0, len / stride);
129 glDrawArrays (key.mode, 0, arr.size () / stride);
130 //glUnlockArraysEXT ();
131 }
132 else
133 {
134 // optimised character quad storage. slower but nice on memory.
135 // reduces storage requirements from 80 bytes/char to 8
136 auto *c = (glyph_data *) arr.data ();
137 auto *e = (glyph_data *)(arr.data () + arr.size ());
138
139 glBegin (key.mode); // practically must be quads
140
141 while (c < e)
142 {
143 glTexCoord2f ( c->u * (1.f / TC_WIDTH), c->v * (1.f / TC_HEIGHT)); glVertex2i (c->x - c->w, c->y - c->h);
144 glTexCoord2f ((c->u + c->w) * (1.f / TC_WIDTH), c->v * (1.f / TC_HEIGHT)); glVertex2i (c->x , c->y - c->h);
145 glTexCoord2f ((c->u + c->w) * (1.f / TC_WIDTH), (c->v + c->h) * (1.f / TC_HEIGHT)); glVertex2i (c->x , c->y );
146 glTexCoord2f ( c->u * (1.f / TC_WIDTH), (c->v + c->h) * (1.f / TC_HEIGHT)); glVertex2i (c->x - c->w, c->y );
147
148 ++c;
149 }
150
151 glEnd ();
152 }
153 }
154
155 glDisable (GL_TEXTURE_2D);
156
157 if (ecb_expect_false (++drawcount == 16))
158 for (auto &&it = h.begin (); it != h.end (); ++it)
159 it->second.shrink_to_fit ();
160 }
161 };
162