1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/* ResidualVM - A 3D game interpreter
*
* ResidualVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the AUTHORS
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/*
* This file is based on, or a modified version of code from TinyGL (C) 1997-1998 Fabrice Bellard,
* which is licensed under the zlib-license (see LICENSE).
* It also has modifications by the ResidualVM-team, which are covered under the GPLv2 (or later).
*/
#include "graphics/tinygl/zgl.h"
namespace TinyGL {
void glopViewport(GLContext *c, GLParam *p) {
int xsize, ysize, xmin, ymin, xsize_req, ysize_req;
xmin = p[1].i;
ymin = p[2].i;
xsize = p[3].i;
ysize = p[4].i;
// we may need to resize the zbuffer
if (c->viewport.xmin != xmin || c->viewport.ymin != ymin ||
c->viewport.xsize != xsize || c->viewport.ysize != ysize) {
xsize_req = xmin + xsize;
ysize_req = ymin + ysize;
if (c->gl_resize_viewport && c->gl_resize_viewport(c, &xsize_req, &ysize_req) != 0) {
error("glViewport: error while resizing display");
}
xsize = xsize_req - xmin;
ysize = ysize_req - ymin;
if (xsize <= 0 || ysize <= 0) {
error("glViewport: size too small");
}
c->viewport.xmin = xmin;
c->viewport.ymin = ymin;
c->viewport.xsize = xsize;
c->viewport.ysize = ysize;
c->viewport.updated = 1;
}
}
void glopEnableDisable(GLContext *c, GLParam *p) {
int code = p[1].i;
int v = p[2].i;
switch (code) {
case TGL_CULL_FACE:
c->cull_face_enabled = v;
break;
case TGL_LIGHTING:
c->lighting_enabled = v;
break;
case TGL_COLOR_MATERIAL:
c->color_material_enabled = v;
break;
case TGL_TEXTURE_2D:
c->texture_2d_enabled = v;
break;
case TGL_NORMALIZE:
c->normalize_enabled = v;
break;
case TGL_DEPTH_TEST:
c->depth_test = v;
c->fb->enableDepthTest(v);
break;
case TGL_ALPHA_TEST:
c->fb->enableAlphaTest(v);
break;
case TGL_BLEND:
c->fb->enableBlending(v);
break;
case TGL_POLYGON_OFFSET_FILL:
if (v)
c->offset_states |= TGL_OFFSET_FILL;
else
c->offset_states &= ~TGL_OFFSET_FILL;
break;
case TGL_POLYGON_OFFSET_POINT:
if (v)
c->offset_states |= TGL_OFFSET_POINT;
else
c->offset_states &= ~TGL_OFFSET_POINT;
break;
case TGL_POLYGON_OFFSET_LINE:
if (v)
c->offset_states |= TGL_OFFSET_LINE;
else
c->offset_states &= ~TGL_OFFSET_LINE;
break;
case TGL_SHADOW_MASK_MODE:
if (v)
c->shadow_mode |= 1;
else
c->shadow_mode &= ~1;
break;
case TGL_SHADOW_MODE:
if (v)
c->shadow_mode |= 2;
else
c->shadow_mode &= ~2;
break;
default:
if (code >= TGL_LIGHT0 && code < TGL_LIGHT0 + T_MAX_LIGHTS) {
gl_enable_disable_light(c, code - TGL_LIGHT0, v);
} else {
//warning("glEnableDisable: 0x%X not supported.", code);
}
break;
}
}
void glopBlendFunc(GLContext *c, GLParam *p) {
TGLenum sfactor = p[1].i;
TGLenum dfactor = p[2].i;
c->fb->setBlendingFactors(sfactor, dfactor);
}
void glopAlphaFunc(GLContext *c, GLParam *p) {
TGLenum func = p[1].i;
float ref = p[2].f;
c->fb->setAlphaTestFunc(func, (int)(ref * 255));
}
void glopDepthFunc(GLContext *c, GLParam *p) {
TGLenum func = p[1].i;
c->fb->setDepthFunc(func);
}
void glopShadeModel(GLContext *c, GLParam *p) {
int code = p[1].i;
c->current_shade_model = code;
}
void glopCullFace(GLContext *c, GLParam *p) {
int code = p[1].i;
c->current_cull_face = code;
}
void glopFrontFace(GLContext *c, GLParam *p) {
int code = p[1].i;
c->current_front_face = code;
}
void glopPolygonMode(GLContext *c, GLParam *p) {
int face = p[1].i;
int mode = p[2].i;
switch (face) {
case TGL_BACK:
c->polygon_mode_back = mode;
break;
case TGL_FRONT:
c->polygon_mode_front = mode;
break;
case TGL_FRONT_AND_BACK:
c->polygon_mode_front = mode;
c->polygon_mode_back = mode;
break;
default:
assert(0);
}
}
void glopHint(GLContext *, GLParam *) {
// do nothing
}
void glopPolygonOffset(GLContext *c, GLParam *p) {
c->offset_factor = p[1].f;
c->offset_units = p[2].f;
}
void glopColorMask(GLContext *c, TinyGL::GLParam *p) {
c->color_mask = p[1].i;
}
void glopDepthMask(GLContext *c, TinyGL::GLParam *p) {
c->fb->enableDepthWrite(p[1].i);
}
} // end of namespace TinyGL
|
