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
|
#include <asura-utils/exceptions/exception.h>
#include "shader_source.h"
#include "shader.h"
using namespace std;
namespace AsuraEngine
{
namespace Graphics
{
Shader::Shader()
{
mProgram = glCreateProgram();
if (mProgram == 0)
throw Exception("Cannot create OpenGL shader program.");
mVertShader = glCreateShader(GL_VERTEX_SHADER);
if (mVertShader == 0)
{
glDeleteProgram(mProgram);
throw Exception("Cannot create OpenGL vertex shader.");
}
mFragShader = glCreateShader(GL_FRAGMENT_SHADER);
if (mFragShader == 0)
{
glDeleteProgram(mProgram);
glDeleteShader(mVertShader);
throw Exception("Cannot create OpenGL fragment shader.");
}
}
Shader::~Shader()
{
glDeleteShader(mVertShader);
glDeleteShader(mFragShader);
glDeleteProgram(mProgram);
}
bool Shader::Renew(AEIO::DecodedData* db)
{
if (!db) return false;
ShaderSouce* shaderSource = static_cast<ShaderSouce*>(db);
if (!shaderSource) return false;
GLenum err = GL_NO_ERROR;
const GLchar* source;
GLint success;
string warnning = "";
// Compile vertex shader.
source = shaderSource->mVert.c_str();
glShaderSource(mVertShader, 1, &source, NULL);
glCompileShader(mVertShader);
glGetShaderiv(mVertShader, GL_COMPILE_STATUS, &success);
if (success == GL_FALSE)
{
warnning = GetShaderWarnings(mVertShader);
throw Exception("Compile vertex shader failed:\n%s", warnning.c_str());
}
// Compile fragment shader.
source = shaderSource->mFrag.c_str();
glShaderSource(mFragShader, 1, &source, NULL);
glCompileShader(mFragShader);
glGetShaderiv(mFragShader, GL_COMPILE_STATUS, &success);
if (success == GL_FALSE)
{
warnning = GetShaderWarnings(mFragShader);
throw Exception("Compile fragment shader failed:\n%s", warnning.c_str());
}
// Link program.
glAttachShader(mProgram, mVertShader);
glAttachShader(mProgram, mFragShader);
glLinkProgram(mProgram);
glGetProgramiv(mProgram, GL_LINK_STATUS, &success);
if (success == GL_FALSE)
{
warnning = GetProgramWarnings();
throw Exception("Link shader program failed:\n%s", warnning.c_str());
}
}
uint Shader::GetUniformLocation(const std::string& uniform)
{
return 0;
}
GLuint Shader::GetGLProgramHandle()
{
return mProgram;
}
void Shader::Use()
{
if (mProgram != 0)
{
gl.UseShader(this);
}
}
void Shader::Unuse()
{
gl.UnuseShader();
}
void Shader::SetUniformFloat(uint loc, float value)
{
if(gl.state.shader == this)
glUniform1f(loc, value);
}
void Shader::SetUniformTexture(uint loc, const Texture& texture)
{
if (gl.state.shader == this)
glUniform1i(loc, texture.GetGLTextureHandle());
}
void Shader::SetUniformVector2(uint loc, const Math::Vector2f& vec2)
{
if (gl.state.shader == this)
glUniform2f(loc, vec2.x, vec2.y);
}
void Shader::SetUniformVector3(uint loc, const Math::Vector3f& vec3)
{
if (gl.state.shader == this)
glUniform3f(loc, vec3.x, vec3.y, vec3.z);
}
void Shader::SetUniformVector4(uint loc, const Math::Vector4f& vec4)
{
if (gl.state.shader == this)
glUniform4f(loc, vec4.x, vec4.y, vec4.z, vec4.w);
}
uint Shader::GetGLTextureUnitCount()
{
GLint maxTextureUnits = 0;
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
return (uint)maxTextureUnits;
}
std::string Shader::GetProgramWarnings()
{
GLint strsize, nullpos;
glGetProgramiv(mProgram, GL_INFO_LOG_LENGTH, &strsize);
if (strsize == 0)
return "";
char *tempstr = new char[strsize];
memset(tempstr, '\0', strsize);
glGetProgramInfoLog(mProgram, strsize, &nullpos, tempstr);
tempstr[nullpos] = '\0';
std::string warnings(tempstr);
delete[] tempstr;
return warnings;
}
std::string Shader::GetShaderWarnings(GLuint shader)
{
GLint strsize, nullpos;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &strsize);
if (strsize == 0)
return "";
char *tempstr = new char[strsize];
memset(tempstr, '\0', strsize);
glGetShaderInfoLog(shader, strsize, &nullpos, tempstr);
tempstr[nullpos] = '\0';
std::string warnings(tempstr);
delete[] tempstr;
return warnings;
}
}
}
|
