92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
//
|
|
// Copyright 2015 Pixar
|
|
//
|
|
// Licensed under the terms set forth in the LICENSE.txt file available at
|
|
// https://opensubdiv.org/license.
|
|
//
|
|
|
|
#include "glLoader.h"
|
|
|
|
#include "glShaderCache.h"
|
|
#include "glUtils.h"
|
|
|
|
#include <vector>
|
|
#include <opensubdiv/far/error.h>
|
|
|
|
GLDrawConfig::GLDrawConfig(const std::string &version)
|
|
: _version(version), _numShaders(0) {
|
|
_program = glCreateProgram();
|
|
}
|
|
|
|
|
|
GLDrawConfig::~GLDrawConfig() {
|
|
if (_program)
|
|
glDeleteProgram(_program);
|
|
}
|
|
|
|
bool
|
|
GLDrawConfig::CompileAndAttachShader(GLenum shaderType,
|
|
const std::string &source) {
|
|
|
|
|
|
GLuint shader = glCreateShader(shaderType);
|
|
|
|
#if 0
|
|
const char *sources[2];
|
|
sources[0] = _version.c_str();
|
|
sources[1] = source.c_str();
|
|
#endif
|
|
|
|
std::string sources = _version + source;
|
|
|
|
const char *src = sources.c_str();
|
|
|
|
glShaderSource(shader, 1, &src, NULL);
|
|
glCompileShader(shader);
|
|
|
|
GLint status;
|
|
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
|
|
if (status == GL_FALSE) {
|
|
GLint infoLogLength;
|
|
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLogLength);
|
|
char * infoLog = new char[infoLogLength];
|
|
glGetShaderInfoLog(shader, infoLogLength, NULL, infoLog);
|
|
OpenSubdiv::Far::Error(OpenSubdiv::Far::FAR_RUNTIME_ERROR,
|
|
"Error compiling GLSL shader: %s\n",
|
|
infoLog);
|
|
delete[] infoLog;
|
|
return false;
|
|
}
|
|
|
|
glAttachShader(_program, shader);
|
|
++_numShaders;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
GLDrawConfig::Link() {
|
|
glLinkProgram(_program);
|
|
|
|
std::vector<GLuint> shaders(_numShaders);
|
|
GLsizei count = 0;
|
|
glGetAttachedShaders(_program, _numShaders, &count, &shaders[0]);
|
|
for (int i = 0; i < (int)count; ++i) {
|
|
glDeleteShader(shaders[i]);
|
|
}
|
|
|
|
GLint status;
|
|
glGetProgramiv(_program, GL_LINK_STATUS, &status );
|
|
if (status == GL_FALSE) {
|
|
GLint infoLogLength;
|
|
glGetProgramiv(_program, GL_INFO_LOG_LENGTH, &infoLogLength);
|
|
char * infoLog = new char[infoLogLength];
|
|
glGetProgramInfoLog(_program, infoLogLength, NULL, infoLog);
|
|
OpenSubdiv::Far::Error(OpenSubdiv::Far::FAR_RUNTIME_ERROR,
|
|
"Error linking GLSL program: %s\n", infoLog);
|
|
delete[] infoLog;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|