Base/GL_Program.cpp at master · linoclapton/Base · GitHub

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#include"GL_Program.h"

namespaceULY{


Shader::Shader(string path) {
read(path);
 }
voidShader::read(string path){
 ifstream fstream(path, std::ios::in);
if (fstream.is_open()) {
 std::string Line = "";
while (getline(fstream, Line))
 m_shader_source += "\n" + Line;
 fstream.close();
 }
else {
 cout<<""<<endl;
return;
 }
 }
voidShader::compile(GLenum type){
 m_shader = glCreateShader(type);
 GLint Result = GL_FALSE;
int InfoLogLength;
// Compile Vertex Shader
charconst * sourcePointer = m_shader_source.c_str();
glShaderSource(m_shader, 1, &sourcePointer, NULL);
glCompileShader(m_shader);
// Check Vertex Shader
glGetShaderiv(m_shader, GL_COMPILE_STATUS, &Result);
glGetShaderiv(m_shader, GL_INFO_LOG_LENGTH, &InfoLogLength);
if (InfoLogLength > 0){
 std::vector<char> VertexShaderErrorMessage(InfoLogLength + 1);
glGetShaderInfoLog(m_shader, InfoLogLength, NULL, &VertexShaderErrorMessage[0]);
 cout<<&VertexShaderErrorMessage[0]<<endl;
 }
 }
voidGL_VS::attach(GL_PG *p) {
if(m_shader!=0)
glAttachShader(p->m_program, m_shader);
 }
GL_PG::GL_PG(string vs,string fs){
 m_program = glCreateProgram();
 m_vs = newGL_VS(vs);
 m_fs = newGL_FS(fs);
link();
 }
voidGL_PG::link() {
 m_vs->attach(this);
 m_fs->attach(this);
glLinkProgram(m_program);
 GLint status;
glGetProgramiv(m_program, GL_LINK_STATUS, &status);
if (GL_FALSE == status) {
fprintf(stderr, "Failed to link shader program!\n");
 GLint logLen;
glGetProgramiv(m_program, GL_INFO_LOG_LENGTH,
 &logLen);
if (logLen > 0)
 {
char * log = (char *)malloc(logLen);
 GLsizei written;
glGetProgramInfoLog(m_program, logLen, &written, log);
 }
 }
 GLint maxLength,nUniforms;
glGetProgramiv(m_program, GL_ACTIVE_UNIFORM_MAX_LENGTH,&maxLength);
glGetProgramiv(m_program, GL_ACTIVE_UNIFORMS,&nUniforms);
 GLchar * name = new GLchar[maxLength];
 GLint written, size, location;
 GLenum type;
for (int i = 0; i < nUniforms; ++i) {
glGetActiveUniform(m_program, i, maxLength, &written,&size, &type, name);
 location = glGetUniformLocation(m_program, name);
 m_uniforms[name] = location;
 }
delete []name;
 }

voidGL_Debugger::printActiveAttirbs(GL_PG *pg) {
 GLint maxLength, nAttribs;
glGetProgramiv(pg->m_program, GL_ACTIVE_ATTRIBUTES, &nAttribs);
glGetProgramiv(pg->m_program, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH,
 &maxLength);
 GLchar * name = (GLchar *)malloc(maxLength);
 GLint written, size, location;
 GLenum type;
printf(" Index | Name\n");
printf("------------------------------------------------\n");
for (int i = 0; i < nAttribs; i++) {
glGetActiveAttrib(pg->m_program, i, maxLength, &written,
 &size, &type, name);
 location = glGetAttribLocation(pg->m_program, name);
printf(" %-8d | %-10s | %-2d | %s\n", location, name,size,glEnumToString(type));
 }
free(name);
 }

char* GL_Debugger::glEnumToString(GLenum type) {
switch(type){
caseGL_FLOAT_VEC2: return"GL_FLOAT_VEC2";
caseGL_FLOAT_VEC3: return"GL_FLOAT_VEC3";
caseGL_FLOAT_VEC4: return"GL_FLOAT_VEC4";
caseGL_FLOAT: return"GL_FLOAT";
caseGL_INT: return"GL_INT";
caseGL_FLOAT_MAT2: return"GL_FLOAT_MAT2";
caseGL_FLOAT_MAT3: return"GL_FLOAT_MAT3";
caseGL_FLOAT_MAT4: return"GL_FLOAT_MAT4";
caseGL_SAMPLER_1D: return"GL_SAMPLER_1D";
caseGL_SAMPLER_2D: return"GL_SAMPLER_2D";
caseGL_SAMPLER_3D: return"GL_SAMPLER_3D";
caseGL_SAMPLER_CUBE: return"GL_SAMPLER_CUBE";
caseGL_SAMPLER_1D_SHADOW: return"GL_SAMPLER_1D_SHADOW";
caseGL_SAMPLER_2D_SHADOW: return"GL_SAMPLER_2D_SHADOW";
default: return"UN_KNOWN_ENUM";
 }
 }

voidGL_Debugger::printActiveUniforms(GL_PG *pg){
 GLint maxLength,nUniforms;
glGetProgramiv(pg->m_program, GL_ACTIVE_UNIFORM_MAX_LENGTH,&maxLength);
glGetProgramiv(pg->m_program, GL_ACTIVE_UNIFORMS,&nUniforms);
 GLchar * name = (GLchar *)malloc(maxLength);
 GLint written, size, location;
 GLenum type;
printf(" Location | Name | Size | Type\n");
printf("------------------------------------------------\n");
for (int i = 0; i < nUniforms; ++i) {
glGetActiveUniform(pg->m_program, i, maxLength, &written,&size, &type, name);
 location = glGetUniformLocation(pg->m_program, name);
printf(" %-8d | %-10s | %-2d | %s\n", location, name,size,glEnumToString(type));
 }
 std::cout<<std::endl;
free(name);
 }

voidGL_Debugger::printGraphicInfo(){
const GLubyte *renderer = glGetString( GL_RENDERER );
const GLubyte *vendor = glGetString( GL_VENDOR );
const GLubyte *version = glGetString( GL_VERSION );
const GLubyte *glslVersion = glGetString( GL_SHADING_LANGUAGE_VERSION );
 GLint major, minor;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
printf("GL Vendor : %s\n", vendor);
printf("GL Renderer : %s\n", renderer);
printf("GL Version (string) : %s\n", version);
printf("GL Version (integer) : %d.%d\n", major, minor);
printf("GLSL Version : %s\n", glslVersion);
 }
voidGL_Debugger::printGLExtension(){
 GLint nExtensions;
glGetIntegerv(GL_NUM_EXTENSIONS, &nExtensions);
for( int i = 0; i < nExtensions; i++ )
printf("%s\n", glGetStringi( GL_EXTENSIONS, i ) );
 }
}