void Program::Link()
{
GLint res;
glLinkProgram( obj );
glGetProgramiv( obj, GL_LINK_STATUS, &res );
if ( res == GL_FALSE )
throw LinkException( GetInfoLog() );
}
void Shader::Compile()
{
GLint res;
glCompileShader( obj );
glGetShaderiv( obj, GL_COMPILE_STATUS, &res );
if ( res == GL_FALSE )
throw CompileException( GetInfoLog() );
}
bool operator()()
{
GLint logLength;
Getiv(object_, GL_INFO_LOG_LENGTH, &logLength);
if (logLength) {
GLchar *log = new GLchar[logLength];
GetInfoLog(object_, logLength, &logLength, log);
std::cout << "GLSL: " << log << std::endl;
delete [] log;
return false;
}
return true;
}
void ShaderProgram::PrintInfoLog()
{
std::string errStr = GetInfoLog();
std::cout << errStr << std::endl;
}
ShaderSource::ShaderSource(const string& name, Type shaderType, const string& source)
: mShader(glCreateShader(shaderType == Vertex ? GL_VERTEX_SHADER : GL_FRAGMENT_SHADER))
{
pwnAssert_NoGLError();
if(mShader == 0)
{
throw "failed to create shader";
}
GLint length = source.length();
const char* sourcep = source.c_str();
glShaderSource(mShader, 1, &sourcep, &length);
pwnAssert_NoGLError();
glCompileShader(mShader);
pwnAssert_NoGLError();
if(false == CompileStatus(mShader))
{
throw
static_cast<string>(core::Str() << "Shader: " << name << " failed to compile: " << GetInfoLog(mShader));
}
}
//
// Link
//
void CShadingProgram::Link()
{
m_UniformCache.clear();
m_SamplerUniformCache.clear();
m_BindableUniformCache.clear();
m_Samplers.clear();
glLinkProgram( m_Program );
GLint LinkStatus;
glGetProgramiv( m_Program, GL_LINK_STATUS, &LinkStatus );
if (LinkStatus != GL_TRUE)
{
m_LastInfoLog = GetInfoLog().c_str();
throw Sys::CException( this, "::Link() : Failed to link GLSL program. See program log for more details." );
}
GLint ActiveUniforms;
GLint MaxLength;
glGetProgramiv( m_Program, GL_ACTIVE_UNIFORMS, &ActiveUniforms );
glGetProgramiv( m_Program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &MaxLength );
vector<GLchar> Name( MaxLength, '\0' );
GLenum Unit = GL_TEXTURE0;
// Получаем описание всех юниформов, и если очередной юниформ является самплером,
// резервируем для него текстурный блок и заносим его и местоположение юниформа в список.
for (int i = 0; i < ActiveUniforms; ++i)
{
GLint Size;
GLenum Type;
//GLint Location;
glGetActiveUniform( m_Program, i, MaxLength, NULL, &Size, &Type, &Name[ 0 ] );
switch (Type)
{
// OpenGL 2.0
case GL_SAMPLER_1D:
case GL_SAMPLER_2D:
case GL_SAMPLER_3D:
case GL_SAMPLER_CUBE:
case GL_SAMPLER_1D_SHADOW:
case GL_SAMPLER_2D_SHADOW:
// GL_ARB_shader_objects/GL_ARB_texture_rectangle
case GL_SAMPLER_2D_RECT_ARB:
case GL_SAMPLER_2D_RECT_SHADOW_ARB:
// GL_EXT_gpu_shader4
case GL_SAMPLER_1D_ARRAY_EXT:
case GL_SAMPLER_2D_ARRAY_EXT:
//case GL_SAMPLER_BUFFER_EXT: ?
case GL_SAMPLER_1D_ARRAY_SHADOW_EXT:
case GL_SAMPLER_2D_ARRAY_SHADOW_EXT:
case GL_SAMPLER_CUBE_SHADOW_EXT:
case GL_INT_SAMPLER_1D_EXT:
case GL_INT_SAMPLER_2D_EXT:
case GL_INT_SAMPLER_3D_EXT:
case GL_INT_SAMPLER_CUBE_EXT:
case GL_INT_SAMPLER_2D_RECT_EXT:
case GL_INT_SAMPLER_1D_ARRAY_EXT:
case GL_INT_SAMPLER_2D_ARRAY_EXT:
//case GL_INT_SAMPLER_BUFFER_EXT: ?
case GL_UNSIGNED_INT_SAMPLER_1D_EXT:
case GL_UNSIGNED_INT_SAMPLER_2D_EXT:
case GL_UNSIGNED_INT_SAMPLER_3D_EXT:
case GL_UNSIGNED_INT_SAMPLER_CUBE_EXT:
case GL_UNSIGNED_INT_SAMPLER_2D_RECT_EXT:
case GL_UNSIGNED_INT_SAMPLER_1D_ARRAY_EXT:
case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY_EXT:
//case GL_UNSIGNED_INT_SAMPLER_BUFFER_EXT: ?
if (Unit - GL_TEXTURE0 == m_Caps.MaxTextureImageUnits)
throw Sys::CException( this, "::Link() : Too many active uniforms of sampler type.\nNumber of samplers exceed implementation-dependent constant GL_MAX_TEXTURE_IMAGE_UNITS." );
{
GLint Location = glGetUniformLocation( m_Program, &Name[ 0 ] );
m_Samplers[ Location ] = Unit++;
}
break;
}
}
}
