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
|
void SliceWidget::initializeGL()
{
makeCurrent();
initializeOpenGLFunctions();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
Vertex = new QOpenGLShader(QOpenGLShader::Vertex);
Vertex->compileSourceCode(
"#version 450\n"
"layout(location = 0) in vec2 xy;\n"
"layout(location = 1) in vec2 uv;\n"
"out vec2 texCoord;\n"
"void main()"
"{\n"
" texCoord = uv;\n"
" gl_Position = vec4(xy, 0.0f, 1.0f);\n"
"}\n"
);
if (!Vertex->isCompiled())
std::cerr << "[Error] Vertex Shader is not compiled\n";
Fragment = new QOpenGLShader(QOpenGLShader::Fragment);
Fragment->compileSourceCode(
"#version 450\n"
"in vec2 texCoord;\n"
"out vec4 out_color;\n"
"uniform sampler2D tex;\n"
"void main()"
"{\n"
" out_color = texture(tex, texCoord).rgba;\n"
"}\n"
);
if (!Fragment->isCompiled())
std::cerr << "[Error] Fragment Shader is not compiled\n";
Program = new QOpenGLShaderProgram();
Program->addShader(Vertex);
Program->addShader(Fragment);
if (!Program->bind())
std::cerr << "[Error] " << Program->log().toStdString() << '\n';
if (!Vao.create())
std::cerr << "[Error] Vao create() fail\n";
Vao.bind();
glGenTextures(1, &Tex);
glBindTexture(GL_TEXTURE_2D, Tex);
glTexImage2D(GL_TEXTURE_2D, 0,
GL_RGBA,
Fd.width, Fd.height, 0,
GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glUniform1i(glGetUniformLocation(Program->programId(), "tex"), 0);
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
cudaGraphicsGLRegisterImage(&cuResource, Tex, GL_TEXTURE_2D,
cudaGraphicsMapFlags::cudaGraphicsMapFlagsNone);
const float data[16] = {
// Top-left
-1.0f, 1.0, //xy coord
0.0f, 0.0f, // uv coord
// Top-right
1.0f, 1.0f,
1.0f, 0.0f,
// Bottom-right
1.0f, -1.0f,
1.0f, 1.0f,
// Bottom-left
-1.0, -1.0,
0.0f, 1.0f
};
glGenBuffers(1, &Vbo);
glBindBuffer(GL_ARRAY_BUFFER, Vbo);
glBufferData(GL_ARRAY_BUFFER, 16 * sizeof(GLfloat), data, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), 0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float),
reinterpret_cast<void*>(2 * sizeof(float)));
glDisableVertexAttribArray(1);
glDisableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
const GLuint elements[6] = {
0, 1, 2,
2, 3, 0
};
glGenBuffers(1, &Ebo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, Ebo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, 6 * sizeof(GLuint), elements, GL_STATIC_DRAW);
Vao.release();
Program->release();
glViewport(0, 0, Width, Height);
doneCurrent();
} |
