void Shader::_compile() {
if (shader != 0) return;
shader = glCreateShaderObjectARB(shaderType());
if (shader == 0) {
throw std::runtime_error("failed to create shader object");
}
const char *_prog = prog.c_str();
GLint length = prog.size();
glShaderSourceARB(shader, 1, &_prog, &length);
glCompileShaderARB(shader);
GLint compile_status = 0;
glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &compile_status);
if (compile_status == 0) {
std::ostringstream err;
err << "failed to compile shader:" << std::endl << glsl_log(shader) << std::endl;
glDeleteObjectARB(shader);
shader = 0;
throw std::runtime_error(err.str());
}
}
void Shader::compileFlat() {
if (shader != 0) return;
shader = glCreateShaderObjectARB(shaderType());
if (shader == 0) {
throw std::runtime_error("failed to create shader object");
}
std::list<std::string> all_source;
s_tag++;
_source(all_source);
std::ostringstream _prog;
std::copy(all_source.begin(), all_source.end(), std::ostream_iterator<std::string>(_prog, "\n"));
GLint length = _prog.str().size();
const char *_p = _prog.str().c_str();
glShaderSourceARB(shader, 1, &_p, &length);
glCompileShaderARB(shader);
GLint compile_status = 0;
glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &compile_status);
if (compile_status == 0) {
std::ostringstream err;
err << "failed to compile shader:" << std::endl << "----" << std::endl << glsl_log(shader) << std::endl << "----" << std::endl;
glDeleteObjectARB(shader);
shader = 0;
throw std::runtime_error(err.str());
}
}
/**
* Disable the shader.
*/
void GLShader::disable(void)
{
switch (shaderType()) {
case ST_GL_ARB_FRAGMENT_PROGRAM:
#ifdef ENABLE_ATI_TEXT_FRAGMENT_SHADER
case ST_GL_ATI_TEXT_FRAGMENT_SHADER:
#endif /* ENABLE_ATI_TEXT_FRAGMENT_SHADER */
{
if (m_ARB_program <= 0)
break;
#ifdef ENABLE_ATI_TEXT_FRAGMENT_SHADER
const GLenum prgType = (shaderType() == ST_GL_ARB_FRAGMENT_PROGRAM
? GL_FRAGMENT_PROGRAM_ARB
: GL_TEXT_FRAGMENT_SHADER_ATI
);
#else /* !ENABLE_ATI_TEXT_FRAGMENT_SHADER */
const GLenum prgType = GL_FRAGMENT_PROGRAM_ARB;
#endif /* ENABLE_ATI_TEXT_FRAGMENT_SHADER */
// Disable the shader.
glDisable(prgType);
#ifdef ENABLE_ATI_TEXT_FRAGMENT_SHADER
if (shaderType() == ST_GL_ATI_TEXT_FRAGMENT_SHADER) {
// HACK: at least the Mac OS X 10.5 PPC Radeon drivers are broken and
// without this disable the texture units while the program is still
// running (10.4 PPC seems to work without this though).
// Reference: http://git.mplayerhq.hu/?p=mplayer;a=blob;f=libvo/gl_common.c;hb=HEAD
// NOTE: It doesn't seem to help any...
glFlush();
}
#endif /* ENABLE_ATI_TEXT_FRAGMENT_SHADER */
break;
}
case ST_GL_ATI_FRAGMENT_SHADER:
if (m_ATI_fragment_shader == 0)
break;
glDisable(GL_FRAGMENT_SHADER_ATI);
break;
default:
break;
}
}
/**
* Enable the shader.
*/
void GLShader::enable(void)
{
switch (shaderType()) {
case ST_GL_ARB_FRAGMENT_PROGRAM:
#ifdef ENABLE_ATI_TEXT_FRAGMENT_SHADER
case ST_GL_ATI_TEXT_FRAGMENT_SHADER:
#endif /* ENABLE_ATI_TEXT_FRAGMENT_SHADER */
{
if (m_ARB_program == 0)
break;
#ifdef ENABLE_ATI_TEXT_FRAGMENT_SHADER
const GLenum prgType = (shaderType() == ST_GL_ARB_FRAGMENT_PROGRAM
? GL_FRAGMENT_PROGRAM_ARB
: GL_TEXT_FRAGMENT_SHADER_ATI
);
#else /* !ENABLE_ATI_TEXT_FRAGMENT_SHADER */
const GLenum prgType = GL_FRAGMENT_PROGRAM_ARB;
#endif /* ENABLE_ATI_TEXT_FRAGMENT_SHADER */
// Enable the shader.
glEnable(prgType);
glBindProgramARB(prgType, m_ARB_program);
break;
}
case ST_GL_ATI_FRAGMENT_SHADER:
if (m_ATI_fragment_shader == 0)
break;
glEnable(GL_FRAGMENT_SHADER_ATI);
glBindFragmentShaderATI(m_ATI_fragment_shader);
break;
default:
break;
}
}
const char* shaderTypeStr() { return shaderTypeToStr(shaderType()); }
