/**
* Link vertex shader, fragment shader and geometry shader objects into a
* usable shader executable.
*
* Prints linker errors (if any) to the log.
*
* @param vertex_object Compiled vertex shader object
* @param fragment_object Compiled fragment shader object
* @param geometry_object Compiled geometry shader object
* @return Shader executable
*/
GLhandleARB opengl_shader_link_object(GLhandleARB vertex_object, GLhandleARB fragment_object, GLhandleARB geometry_object)
{
GLhandleARB shader_object = 0;
GLint status = 0;
shader_object = vglCreateProgramObjectARB();
if (vertex_object) {
vglAttachObjectARB(shader_object, vertex_object);
}
if (fragment_object) {
vglAttachObjectARB(shader_object, fragment_object);
}
if (geometry_object) {
vglAttachObjectARB(shader_object, geometry_object);
if ( Current_geo_sdr_params != NULL) {
#ifdef __APPLE__
vglProgramParameteriEXT((long)shader_object, GL_GEOMETRY_INPUT_TYPE_EXT, Current_geo_sdr_params->input_type);
vglProgramParameteriEXT((long)shader_object, GL_GEOMETRY_OUTPUT_TYPE_EXT, Current_geo_sdr_params->output_type);
vglProgramParameteriEXT((long)shader_object, GL_GEOMETRY_VERTICES_OUT_EXT, Current_geo_sdr_params->vertices_out);
#else
vglProgramParameteriEXT((GLuint)shader_object, GL_GEOMETRY_INPUT_TYPE_EXT, Current_geo_sdr_params->input_type);
vglProgramParameteriEXT((GLuint)shader_object, GL_GEOMETRY_OUTPUT_TYPE_EXT, Current_geo_sdr_params->output_type);
vglProgramParameteriEXT((GLuint)shader_object, GL_GEOMETRY_VERTICES_OUT_EXT, Current_geo_sdr_params->vertices_out);
#endif
}
}
vglLinkProgramARB(shader_object);
// check if the link was successful
vglGetObjectParameterivARB(shader_object, GL_OBJECT_LINK_STATUS_ARB, &status);
opengl_shader_check_info_log(shader_object);
// we failed, bail out now...
if (status == 0) {
mprintf(("Shader failed to link:\n%s\n", GLshader_info_log));
if (shader_object) {
vglDeleteObjectARB(shader_object);
}
return 0;
}
// we succeeded, maybe output warnings too
if (strlen(GLshader_info_log) > 5) {
nprintf(("SHADER-DEBUG", "Shader linked with warnings:\n%s\n", GLshader_info_log));
}
return shader_object;
}
/**
* Link a vertex shader object and a fragment shader object into a usable shader executable.
* Prints linker errors (if any) to the log.
*
* @param vertex_object Compiled vertex shader object
* @param fragment_object Compiled fragment shader object
* @return Shader executable
*/
GLhandleARB opengl_shader_link_object(GLhandleARB vertex_object, GLhandleARB fragment_object)
{
GLhandleARB shader_object = 0;
GLint status = 0;
shader_object = vglCreateProgramObjectARB();
if (vertex_object) {
vglAttachObjectARB(shader_object, vertex_object);
}
if (fragment_object) {
vglAttachObjectARB(shader_object, fragment_object);
}
vglLinkProgramARB(shader_object);
// check if the link was successful
vglGetObjectParameterivARB(shader_object, GL_OBJECT_LINK_STATUS_ARB, &status);
opengl_shader_check_info_log(shader_object);
// we failed, bail out now...
if (status == 0) {
mprintf(("Shader failed to link:\n%s\n", GLshader_info_log));
if (shader_object) {
vglDeleteObjectARB(shader_object);
}
return 0;
}
// we succeeded, maybe output warnings too
if (strlen(GLshader_info_log) > 5) {
nprintf(("SHADER-DEBUG", "Shader linked with warnings:\n%s\n", GLshader_info_log));
}
return shader_object;
}
