void Shader::Link(const char *name)
{
glLinkProgram(program);
GLint status;
glGetProgramiv(program, GL_LINK_STATUS, &status);
if (status != GL_TRUE)
{
GLSLError(program, true, nullptr);
throw string("linking failed for shader: ") + name;
}
mvp_i = glGetUniformLocation(program, "mvp");
col_i = glGetUniformLocation(program, "col");
camera_i = glGetUniformLocation(program, "camera");
light1_i = glGetUniformLocation(program, "light1");
lightparams1_i = glGetUniformLocation(program, "lightparams1");
bones_i = glGetUniformLocation(program, "bones");
pointscale_i = glGetUniformLocation(program, "pointscale");
glUseProgram(program);
for (int i = 0; i < MAX_SAMPLERS; i++)
{
tex_i[i] = glGetUniformLocation(program, ("tex" + to_string(i)).c_str());
if (tex_i[i] >= 0) glUniform1i(tex_i[i], i);
}
}
uint CompileGLSLShader(GLenum type, uint program, const GLchar *source, string &err)
{
uint obj = glCreateShader(type);
glShaderSource(obj, 1, &source, NULL);
glCompileShader(obj);
GLint success;
glGetShaderiv(obj, GL_COMPILE_STATUS, &success);
if (success)
{
glAttachShader(program, obj);
return obj;
}
err = GLSLError(obj, false, source);
glDeleteShader(obj);
return 0;
}
string Shader::Compile(const char *name, const char *vscode, const char *pscode)
{
program = glCreateProgram();
string err;
vs = CompileGLSLShader(GL_VERTEX_SHADER, program, vscode, err); if (!vs) return string("couldn't compile vertex shader: ") + name + "\n" + err;
ps = CompileGLSLShader(GL_FRAGMENT_SHADER, program, pscode, err); if (!ps) return string("couldn't compile pixel shader: ") + name + "\n" + err;
glBindAttribLocation(program, 0, "apos");
glBindAttribLocation(program, 1, "anormal");
glBindAttribLocation(program, 2, "atc");
glBindAttribLocation(program, 3, "acolor");
glBindAttribLocation(program, 4, "aweights");
glBindAttribLocation(program, 5, "aindices");
glLinkProgram(program);
GLint status;
glGetProgramiv(program, GL_LINK_STATUS, &status);
if (status != GL_TRUE)
{
GLSLError(program, true, NULL);
throw string("linking failed for shader: ") + name;
}
mvp_i = glGetUniformLocation(program, "mvp");
col_i = glGetUniformLocation(program, "col");
camera_i = glGetUniformLocation(program, "camera");
light1_i = glGetUniformLocation(program, "light1");
bones_i = glGetUniformLocation(program, "bones");
glUseProgram(program);
for (int i = 0; i < MAX_SAMPLERS; i++)
{
tex_i[i] = glGetUniformLocation(program, (string("tex") + inttoa(i)).c_str());
if (tex_i[i] >= 0) glUniform1i(tex_i[i], i);
}
return "";
}
