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
|
/*
* Copyright © 2012 Linaro Limited
*
* This file is part of the glmark2 OpenGL (ES) 2.0 benchmark.
*
* glmark2 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 3 of the License, or (at your option) any later
* version.
*
* glmark2 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
* glmark2. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Alexandros Frantzis
*/
#include "renderer.h"
BaseRenderer::BaseRenderer(const LibMatrix::vec2 &size) :
texture_(0), input_texture_(0), fbo_(0), depth_renderbuffer_(0),
min_filter_(GL_LINEAR), mag_filter_(GL_LINEAR),
wrap_s_(GL_CLAMP_TO_EDGE), wrap_t_(GL_CLAMP_TO_EDGE)
{
setup(size, true, true);
}
BaseRenderer::~BaseRenderer()
{
glDeleteTextures(1, &texture_);
glDeleteRenderbuffers(1, &depth_renderbuffer_);
glDeleteFramebuffers(1, &fbo_);
}
void
BaseRenderer::setup(const LibMatrix::vec2 &size, bool onscreen, bool has_depth)
{
size_ = size;
recreate(onscreen, has_depth);
}
void
BaseRenderer::setup_texture(GLint min_filter, GLint mag_filter,
GLint wrap_s, GLint wrap_t)
{
min_filter_ = min_filter;
mag_filter_ = mag_filter;
wrap_s_ = wrap_s;
wrap_t_ = wrap_t;
update_texture_parameters();
}
void
BaseRenderer::make_current()
{
glBindFramebuffer(GL_FRAMEBUFFER, fbo_);
glViewport(0, 0, size_.x(), size_.y());
if (!fbo_ || depth_renderbuffer_) {
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
}
else {
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
}
}
void
BaseRenderer::update_mipmap()
{
if (texture_ && min_filter_ != GL_NEAREST && min_filter_ != GL_LINEAR) {
glBindTexture(GL_TEXTURE_2D, texture_);
glGenerateMipmap(GL_TEXTURE_2D);
}
}
void
BaseRenderer::recreate(bool onscreen, bool has_depth)
{
if (texture_) {
glDeleteTextures(1, &texture_);
texture_ = 0;
}
if (fbo_) {
glDeleteRenderbuffers(1, &depth_renderbuffer_);
depth_renderbuffer_ = 0;
glDeleteFramebuffers(1, &fbo_);
fbo_ = 0;
}
if (!onscreen) {
create_texture();
create_fbo(has_depth);
}
}
void
BaseRenderer::create_texture()
{
glGenTextures(1, &texture_);
glBindTexture(GL_TEXTURE_2D, texture_);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size_.x(), size_.y(), 0,
GL_RGBA, GL_UNSIGNED_BYTE, 0);
update_texture_parameters();
}
void
BaseRenderer::update_texture_parameters()
{
if (texture_) {
glBindTexture(GL_TEXTURE_2D, texture_);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter_);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter_);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap_s_);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_t_);
}
update_mipmap();
}
void
BaseRenderer::create_fbo(bool has_depth)
{
if (has_depth) {
/* Create a renderbuffer for depth storage */
glGenRenderbuffers(1, &depth_renderbuffer_);
glBindRenderbuffer(GL_RENDERBUFFER, depth_renderbuffer_);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16,
size_.x(), size_.y());
}
/* Create the FBO and attach the texture and the renderebuffer */
glGenFramebuffers(1, &fbo_);
glBindFramebuffer(GL_FRAMEBUFFER, fbo_);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, texture_, 0);
if (has_depth) {
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, depth_renderbuffer_);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
|
